datatop: Snapshot of version 1.0.4

datatop is a utility that captures various linux system parameters
required for analyzing throughput and data path issues.

Fix some compilation and code style issues.

Acked-by: Brennan McConnell <brennanm@qti.qualcomm.com>
Change-Id: I2138f657a565fe3d7bcf4bce2ef7142f5557a868

28 files changed, 4482 insertions, 0 deletions

diff --git a/datatop/Android.mk b/datatop/Android.mk
new file mode 100644
index 0000000..8338432
--- /dev/null
+++ b/datatop/Android.mk
@@ -0,0 +1,2 @@
+include $(call all-subdir-makefiles)
+
diff --git a/datatop/Makefile.am b/datatop/Makefile.am
new file mode 100644
index 0000000..15ea2b3
--- /dev/null
+++ b/datatop/Makefile.am
@@ -0,0 +1,3 @@
+AUTOMAKE_OPTIONS = foreign
+
+SUBDIRS = src
diff --git a/datatop/autogen.sh b/datatop/autogen.sh
new file mode 100644
index 0000000..7141954
--- /dev/null
+++ b/datatop/autogen.sh
@@ -0,0 +1,51 @@
+#!/bin/sh
+
+# Copyright (c) 2015, The Linux Foundation. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of The Linux Foundation nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+# IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ACLOCAL=`which aclocal`
+AUTOCONF=`which autoconf`
+AUTOMAKE=`which automake`
+
+if [ ! -x "$ACLOCAL" ]; then
+	echo "Missing 'aclocal'; not in path. Make sure it is installed!"
+	exit -1
+fi
+
+if [ ! -x "$AUTOCONF" ]; then
+	echo "Missing 'autoconf'; not in path. Make sure it is installed!"
+	exit -1
+fi
+
+if [ ! -x "$AUTOMAKE" ]; then
+	echo "Missing 'automake'; not in path. Make sure it is installed!"
+	exit -1
+fi
+
+$ACLOCAL
+$AUTOCONF
+$AUTOMAKE -a
diff --git a/datatop/configure.ac b/datatop/configure.ac
new file mode 100644
index 0000000..b9f9abf
--- /dev/null
+++ b/datatop/configure.ac
@@ -0,0 +1,56 @@
+#                                               -*- Autoconf -*-
+
+# Copyright (c) 2015, The Linux Foundation. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of The Linux Foundation nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+# IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Process this file with autoconf to produce a configure script.
+
+AC_PREREQ([2.68])
+AC_INIT([Data Top], [1.0.4], [harouth@codeaurora.org])
+AC_CONFIG_SRCDIR([src/datatop.c])
+#AC_CONFIG_HEADERS([src/config.h])
+AC_CONFIG_FILES([Makefile
+		 src/Makefile])
+
+# Checks for programs.
+AC_PROG_CC
+
+# Checks for libraries.
+
+# Checks for header files.
+AC_CHECK_HEADERS([stdlib.h string.h])
+
+# Checks for typedefs, structures, and compiler characteristics.
+
+# Checks for library functions.
+AC_FUNC_MALLOC
+
+
+#### Generate Makefile Data
+AM_INIT_AUTOMAKE([datatop], [1.0.4])
+
+AC_OUTPUT
diff --git a/datatop/src/Android.mk b/datatop/src/Android.mk
new file mode 100644
index 0000000..835e969
--- /dev/null
+++ b/datatop/src/Android.mk
@@ -0,0 +1,29 @@
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := datatop.c
+LOCAL_SRC_FILES += datatop_cpu_stats_poll.c
+LOCAL_SRC_FILES += datatop_dev_poll.c
+LOCAL_SRC_FILES += datatop_dual_line_poll.c
+LOCAL_SRC_FILES += datatop_fileops.c
+LOCAL_SRC_FILES += datatop_gen_poll.c
+LOCAL_SRC_FILES += datatop_helpers.c
+LOCAL_SRC_FILES += datatop_linked_list.c
+LOCAL_SRC_FILES += datatop_meminfo_file_poll.c
+LOCAL_SRC_FILES += datatop_opt.c
+LOCAL_SRC_FILES += datatop_single_line_poll.c
+LOCAL_SRC_FILES += datatop_stat_poll.c
+LOCAL_SRC_FILES += datatop_str.c
+LOCAL_SRC_FILES += datatop_sys_snap.c
+LOCAL_SRC_FILES += datatop_value_only_poll.c
+
+LOCAL_CFLAGS := -Wall -Wextra -Werror -pedantic
+LOCAL_CFLAGS += -DVERSION="\"1.0.4"\"
+
+LOCAL_C_INCLUDES := $(LOCAL_PATH)
+
+LOCAL_MODULE := datatop
+LOCAL_MODULE_TAGS := optional
+
+include $(BUILD_EXECUTABLE)
diff --git a/datatop/src/Makefile.am b/datatop/src/Makefile.am
new file mode 100644
index 0000000..554b40c
--- /dev/null
+++ b/datatop/src/Makefile.am
@@ -0,0 +1,22 @@
+## Makefile.am for main application
+
+CFLAGS := -std=c99                        # Target c99 for portability
+CFLAGS += -Wall -Wextra -Werror -pedantic # Strict code quality enforcement
+CFLAGS += -g                              # Enable debugging
+
+bin_PROGRAMS = datatop
+datatop_SOURCES := datatop.c
+datatop_SOURCES += datatop_fileops.c
+datatop_SOURCES += datatop_dual_line_poll.c
+datatop_SOURCES += datatop_single_line_poll.c
+datatop_SOURCES += datatop_meminfo_file_poll.c
+datatop_SOURCES += datatop_dev_poll.c
+datatop_SOURCES += datatop_stat_poll.c
+datatop_SOURCES += datatop_value_only_poll.c
+datatop_SOURCES += datatop_str.c
+datatop_SOURCES += datatop_cpu_stats_poll.c
+datatop_SOURCES += datatop_helpers.c
+datatop_SOURCES += datatop_linked_list.c
+datatop_SOURCES += datatop_opt.c
+datatop_SOURCES += datatop_gen_poll.c
+datatop_SOURCES += datatop_sys_snap.c
diff --git a/datatop/src/datatop.c b/datatop/src/datatop.c
new file mode 100644
index 0000000..984de05
--- /dev/null
+++ b/datatop/src/datatop.c
@@ -0,0 +1,275 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+* @file datatop.c
+* @brief Executes commands for application.
+*
+* Contains the main() function where program executes. Calls appropriate
+* methods based on user's CLI commands. Executes parsing function to
+* determine necessary output and handles errors which may arise during the
+* parse. Initiliazes files for data collection. Will call functions designed
+* to poll and print the data in understandable format.
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include "datatop_interface.h"
+#include "datatop_linked_list.h"
+#include "datatop_opt.h"
+#include "datatop_fileops.h"
+#include "datatop_polling.h"
+#include "datatop_gen_poll.h"
+
+struct dtop_linked_list *first_dpg_list;
+struct cli_opts usr_cl_opts;
+
+/**
+ * @brief Prints the datapoint names and values to the terminal.
+ *
+ * @param dpg_list A pointer to the first node of a linked list which
+ *                 contains all data_point_gatherer structs to print.
+ */
+void dtop_print_terminal(struct dtop_linked_list *dpg_list)
+{
+	struct dtop_linked_list *curr_ptr = dpg_list;
+	struct dtop_data_point_gatherer *dpset;
+
+	while (curr_ptr) {
+		dpset = (struct dtop_data_point_gatherer *) curr_ptr->data;
+		dtop_print_dpg(dpset);
+		curr_ptr = curr_ptr->next_ptr;
+	}
+}
+
+/**
+ * @brief Polls the data periodically and prints to file specified by the user.
+ *
+ * Polls the data as often as specified by the user in their CLI arguments
+ * and outputs the data to a file also specified in CLI arguments. Then prints
+ * a snapshot of delta(dp_value) to the terminal.
+ *
+ * @param dpg_list A pointer to the first node of a linked list which contains
+ *                 all data_point_gatherer structs to poll and print.
+ * @param fw A pointer to the file which will be printed to.
+ * @return FILE_ERROR - Writing to file was unsuccessful.
+ * @return FILE_SUCCESS - Writing to file was successful.
+ */
+int dtop_poll_periodically(struct dtop_linked_list *dpg_list, FILE *fw)
+{
+	struct timeval tv, timeout;
+	fd_set rfds;
+	time_t curtime, endtime;
+	int inp, quit;
+	struct dtop_linked_list *curr_ptr = dpg_list;
+	struct dtop_data_point_gatherer *dpset;
+
+	gettimeofday(&tv, NULL);
+	curtime = tv.tv_sec;
+	endtime = tv.tv_sec + usr_cl_opts.poll_time;
+
+	/* print all of our datapoint names as column headers in csv format */
+	if (fprintf(fw, "\"Time\",") < 0)
+		return FILE_ERROR;
+
+	while (curr_ptr) {
+		dpset = (struct dtop_data_point_gatherer *) curr_ptr->data;
+		if (dtop_print_dpg_names_csv(dpset, fw) == FILE_ERROR)
+			return FILE_ERROR;
+		curr_ptr = curr_ptr->next_ptr;
+	}
+	if (fprintf(fw, "\n") < 0)
+		return FILE_ERROR;
+
+	dtop_print_interactive_opts();
+	/* periodically poll the datapoints and print in csv format */
+	while (curtime < endtime
+		|| usr_cl_opts.poll_time == POLL_NOT_SPECIFIED) {
+		FD_ZERO(&rfds);
+		FD_SET(0, &rfds);
+		timeout.tv_sec = usr_cl_opts.poll_per;
+		timeout.tv_usec = 0;
+		inp = select(1, &rfds, NULL, NULL, &timeout);
+		if (inp) {
+			char s[4];
+			scanf("%s", s);
+			if (strcmp(s, "quit") == 0
+			    || strcmp(s, "q") == 0) {
+				quit = QUIT;
+				break;
+			}
+			if (strcmp(s, "i") == 0) {
+				dtop_print_snapshot_diff(first_dpg_list);
+				dtop_reset_dp_initial_values(first_dpg_list);
+			}
+			if (strcmp(s, "l") == 0)
+				dtop_print_snapshot_diff(first_dpg_list);
+		}
+		gettimeofday(&tv, NULL);
+		curtime = tv.tv_sec;
+		dtop_poll(dpg_list);
+		printf("Polled at %ld.%06ld\n", tv.tv_sec, tv.tv_usec);
+		if (dtop_print_time_at_poll(fw) == FILE_ERROR)
+			return FILE_ERROR;
+		if (dtop_write_pollingdata_csv(dpg_list, fw) == FILE_ERROR)
+			return FILE_ERROR;
+	}
+
+	if (quit != QUIT)
+		dtop_print_snapshot_diff(dpg_list);
+	return FILE_SUCCESS;
+}
+
+static void dtop_set_niceness(int niceness)
+{
+	int pid, rc;
+	pid = getpid();
+	printf("Requesting nice %d\n", niceness);
+	rc = setpriority(PRIO_PROCESS, pid, niceness);
+	if (rc != 0)
+		fprintf(stderr, "Error setting priority [%d]\n", errno);
+
+	rc = getpriority(PRIO_PROCESS, pid);
+	printf("Running with nice %d.\n", rc);
+}
+
+int main(int argc, char **argv)
+{
+	int parse_status;
+	printf("DataTop - Version %s\n", VERSION);
+	printf("(c)2014-2015 Linux Foundation\n");
+
+	dtop_load_default_options(&usr_cl_opts);
+
+	parse_status = dtop_parse_cli_opts(&usr_cl_opts, argc, argv);
+	switch (parse_status) {
+	case PARSE_SUCCESS:
+		dtop_set_niceness(usr_cl_opts.priority);
+	break;
+
+	case PARSE_FORCE_EXIT:
+		exit(EXIT_SUCCESS);
+	break;
+
+	case PARSE_FAILURE:
+	default:
+		printf("Failed to parse command line arguments.\n");
+		exit(EXIT_FAILURE);
+	break;
+	}
+
+	dtop_dual_line_init("/proc/net/netstat");
+	dtop_dual_line_init("/proc/net/snmp");
+	dtop_single_line_init("/proc/net/snmp6");
+	dtop_gen_init("/proc/sys/net/");
+	dtop_gen_init("/sys/module/rmnet_data/parameters/");
+	dtop_gen_init("/sys/class/net/rmnet_mhi0/statistics/");
+	dtop_gen_init("/sys/class/net/usb_rmnet0/statistics/");
+	dtop_gen_init("/sys/class/net/rmnet_ipa0/statistics/");
+	dtop_meminfo_init();
+	dtop_dev_init();
+	dtop_stat_init();
+	dtop_cpu_stats_init();
+	dtop_gen_init("/sys/kernel/debug/clk/bimc_clk/");
+	dtop_gen_init("/sys/kernel/debug/clk/snoc_clk/");
+	dtop_gen_init("/sys/kernel/debug/clk/pnoc_clk/");
+
+	if (usr_cl_opts.print_cl == OPT_CHOSE) {
+		dtop_poll(first_dpg_list);
+		dtop_print_terminal(first_dpg_list);
+	}
+
+	if (usr_cl_opts.print_csv == OPT_CHOSE) {
+		FILE *to_file = NULL;
+		if ((dtop_open_writing_file(usr_cl_opts.file_name,
+						&to_file)) == VALID) {
+			printf("\nData being polled for %ld seconds.\n",
+						usr_cl_opts.poll_time);
+			if (dtop_poll_periodically(first_dpg_list, to_file)
+			    == FILE_ERROR) {
+				fprintf(stderr, "err=%d: %s\n", errno,
+							strerror(errno));
+				dtop_close_file(to_file);
+				deconstruct_dpgs(first_dpg_list);
+				dtop_rem_linked_list(first_dpg_list);
+				exit(EXIT_FAILURE);
+			}
+			dtop_close_file(to_file);
+		} else {
+			printf("File Can Not Be Opened\n");
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	if (usr_cl_opts.snapshot_file) {
+		if (dtop_print_system_snapshot(usr_cl_opts.snapshot_file)
+			    == FILE_ERROR) {
+			fprintf(stderr, "err=%d: %s\n", errno,
+						strerror(errno));
+			deconstruct_dpgs(first_dpg_list);
+			dtop_rem_linked_list(first_dpg_list);
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	if (usr_cl_opts.print_cl == OPT_NOT_CHOSE &&
+	    usr_cl_opts.print_csv == OPT_NOT_CHOSE) {
+		if ((!usr_cl_opts.snapshot_file)
+		   || usr_cl_opts.poll_time_selected == POLL_TIME_SELECTED) {
+			printf("\nData will now be polled for %ld seconds.\n",
+							usr_cl_opts.poll_time);
+			dtop_poll(first_dpg_list);
+			sleep(usr_cl_opts.poll_time);
+			dtop_poll(first_dpg_list);
+			dtop_print_snapshot_diff(first_dpg_list);
+		}
+	}
+
+	deconstruct_dpgs(first_dpg_list);
+	dtop_rem_linked_list(first_dpg_list);
+	return 0;
+}
+
+/**
+ * @brief Adds each dpg as a node to a linked list.
+ *
+ * Called when a dpg is initialized.
+ *
+ * @param dpg A pointer to a data_point_gatherer struct which is to be added to the linked list.
+ */
+void dtop_register(struct dtop_data_point_gatherer *dpg)
+{
+	if (dpg)
+		first_dpg_list = dtop_add_linked_list(dpg, first_dpg_list);
+}
diff --git a/datatop/src/datatop_cpu_stats_poll.c b/datatop/src/datatop_cpu_stats_poll.c
new file mode 100644
index 0000000..275ddd8
--- /dev/null
+++ b/datatop/src/datatop_cpu_stats_poll.c
@@ -0,0 +1,182 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_cpu_stats_poll.c
+ * @brief Calls dtop_value_only_init for necessary cpu datapoints.
+ *
+ * File contains methods for determing number of cpu's online and calling
+ * correct initialization function to gather scaling_cur_freq data point
+ * for each cpu along with each cpu's online status.
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <dirent.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <ctype.h>
+#include "datatop_interface.h"
+#include "datatop_fileops.h"
+#include "datatop_str.h"
+#include "datatop_polling.h"
+
+#define DTOP_GEN_SIZE 8192
+#define DTOP_GEN_LINE (DTOP_GEN_SIZE>>2)
+#define NO_CPUS_ONLINE -1
+
+/**
+ * @brief Searches /sys/devices/system/cpu/ directory to get find number of CPUs.
+ *
+ * @return Number of CPUs found in directory.
+ */
+static int dtop_cpu_search(void)
+{
+	DIR *dp;
+	struct dirent *entry;
+	struct stat s;
+	int cpu_amt;
+	char cwd[1024];
+
+	if (!getcwd(cwd, sizeof(cwd))) {
+		fprintf(stderr, "Failed to get current working dir\n");
+		return -1;
+	}
+
+	dp = opendir("/sys/devices/system/cpu/");
+	if (dp == NULL) {
+		fprintf(stderr, "err=%d: %s\n", errno, strerror(errno));
+		fprintf(stderr, "Cannot open directory: %s\n",
+					"/sys/devices/system/cpu/");
+		return NO_CPUS_ONLINE;
+	}
+
+	chdir("/sys/devices/system/cpu/");
+	cpu_amt = 0;
+	while ((entry = readdir(dp))) {
+		if (stat(entry->d_name, &s)) {
+			printf("stat err=%d: %s\n", errno, strerror(errno));
+			return NO_CPUS_ONLINE;
+		}
+
+		if (entry->d_name[0] == 'c' &&
+			entry->d_name[1] == 'p' &&
+			entry->d_name[2] == 'u' &&
+			(isdigit(entry->d_name[3]))) {
+
+			cpu_amt++;
+		}
+	}
+
+	closedir(dp);
+	chdir(cwd);
+	return cpu_amt;
+}
+
+/**
+ * @brief Creates a dpg designed for CPU online and CPU scaling_cur_freq stats.
+ *
+ * @param name Name of file dpg represents.
+ */
+static void construct_cpu_stat_dpg(char *name)
+{
+	char *file = malloc(strlen(name) + 1);
+	struct dtop_data_point *dp =
+			malloc(sizeof(struct dtop_data_point));
+	struct dtop_data_point_gatherer *dpg = malloc
+		(sizeof(struct dtop_data_point_gatherer));
+
+	strlcpy(file, name, strlen(name) + 1);
+
+	dp[0].type = DTOP_ULONG;
+	dp[0].name = malloc(5);
+	strlcpy(dp[0].name, "", 5);
+	dp[0].prefix = NULL;
+	dp[0].data.d_ulong = 0;
+	dp[0].initial_data.d_ulong = 0;
+	dp[0].skip = DO_NOT_SKIP;
+	dp[0].initial_data_populated = NOT_POPULATED;
+
+	dpg->prefix = file;
+	dpg->file = file;
+	dpg->poll = dtop_value_only_poll;
+	dpg->data_points = dp;
+	dpg->data_points_len = 1;
+	dpg->deconstruct = dtop_value_only_dpg_deconstructor;
+
+	dtop_register(dpg);
+}
+
+/**
+ * @brief Calls dpg constructor for necessary CPU stat files.
+ *
+ * Creates file names based on number of CPUs found and calls the
+ * dpg constructor for them.
+ *
+ * @param file Directory where the CPUs are found.
+ * @param add String which is concatenated onto file and represents
+ * the path after a CPU directory is entered.
+ * @param cpu_amt Amount of CPUs found on device.
+ */
+static void cpu_poll_helper(char *file, char *add, int cpu_amt)
+{
+	int i;
+	for (i = 0; i < cpu_amt; i++) {
+		char *cpu_num = malloc(5);
+		char *newfile;
+		int nf_len;
+		snprintf(cpu_num, 5, "%d", i);
+		nf_len = strlen(file) + strlen(add) + strlen(cpu_num) + 2;
+		newfile = malloc(nf_len);
+		strlcpy(newfile, file, nf_len);
+		strlcat(newfile, cpu_num, nf_len);
+		strlcat(newfile, add, nf_len);
+		free(cpu_num);
+		construct_cpu_stat_dpg(newfile);
+		free(newfile);
+	}
+}
+
+/**
+ * @brief Calls necessary functions for CPU stat dpgs.
+ */
+void dtop_cpu_stats_init(void)
+{
+	int cpu_amt;
+	char *file = "/sys/devices/system/cpu/cpu";
+	char *add = "/cpufreq/scaling_cur_freq";
+
+	cpu_amt = dtop_cpu_search();
+	cpu_poll_helper(file, add, cpu_amt);
+	add = "/online";
+	cpu_poll_helper(file, add, cpu_amt);
+}
diff --git a/datatop/src/datatop_dev_poll.c b/datatop/src/datatop_dev_poll.c
new file mode 100644
index 0000000..0dcab1e
--- /dev/null
+++ b/datatop/src/datatop_dev_poll.c
@@ -0,0 +1,320 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_dev_poll.c
+ * @brief Adds ability for data collection from /proc/net/dev
+ *
+ * File contains methods for searching and polling data from
+ * "/proc/net/dev"
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "datatop_interface.h"
+#include "datatop_fileops.h"
+#include "datatop_str.h"
+
+#define DTOP_DEV_SIZE 8192
+#define DTOP_DEV_LINE (DTOP_DEV_SIZE>>2)
+
+/**
+* @struct dtop_dev_vars
+* @brief Struct used to hold necessary variables for /proc/net/dev dpg
+*
+* @var dtop_dev_vars::line
+* Array of strings where necessary dp names and values are held.
+* @var dtop_dev_vars::line_count
+* Number of lines the file is that the dpg represents.
+*/
+struct dtop_dev_vars {
+	char **line;
+	int line_count;
+};
+
+/**
+ * @brief Parses lines with data in "/proc/net/dev"
+ *
+ * @param line1 Line to parse to find datapoint names and values.
+ * @param len1 Length of line1.
+ * @param index Index in the dictionary the key (name) is added to.
+ * @param dict Dictionary the keys and values are added to.
+ */
+static void dt_dev_parse(char *line1, int len1,
+			 int index, struct dt_procdict *dict)
+{
+	int i, start = 0;
+	int j, k, n;
+	i = 0;
+	while (line1[i] == '	' || line1[i] == ' ')
+		i++;
+	dict->key[index] = &line1[i];
+	for (i = 0; i < len1; i++) {
+		if (line1[i] == ':') {
+			line1[i+1] = 0;
+			start = i+2;
+			break;
+		}
+	}
+
+	k = 0;
+	for (j = start; j < len1; j++) {
+		if (line1[j] != '	' && line1[j] != ' ') {
+			dict->val[k] = &line1[j];
+			n = j;
+			while (line1[n] != '	' && line1[n] != ' ')
+				n++;
+			if (n < len1)
+				line1[n] = 0;
+			j = n;
+			k++;
+		}
+	}
+}
+
+/**
+ * @brief Stores the data collected from "/proc/net/dev"
+ *
+ * @param dpg Struct that polled data is added to.
+ * @return DTOP_POLL_IO_ERR - Poll of dpg unsuccessful.
+ * @return DTOP_POLL_OK - Poll of dpg successful.
+ */
+int dtop_dev_poll(struct dtop_data_point_gatherer *dpg)
+{
+	char *data;
+	int *line_len = malloc(sizeof(int) *
+			((struct dtop_dev_vars *)
+			(dpg->priv))->line_count);
+	int read;
+	struct dt_procdict *dict = malloc(sizeof(struct dt_procdict)
+					*((struct dtop_dev_vars *)
+					(dpg->priv))->line_count-2);
+	int j, n, sum;
+	int index = 0;
+	int dp = 0;
+
+	read = dt_read_file(dpg->file, &data, DTOP_DEV_SIZE);
+	if (read == 0 || data == 0)
+		return DTOP_POLL_IO_ERR;
+
+	sum = 0;
+	/* Assigns each line read from the file, a length */
+	for (n = 0; n < ((struct dtop_dev_vars *)
+				(dpg->priv))->line_count; n++) {
+		line_len[n] = dt_read_line(((struct dtop_dev_vars *)
+					(dpg->priv))->line[n],
+					   DTOP_DEV_LINE, data,
+					   DTOP_DEV_SIZE, sum);
+		if (n <= (((struct dtop_dev_vars *)
+			(dpg->priv))->line_count - 1)) {
+			sum += (line_len[n] + 1);
+		}
+
+	}
+
+	for (n = 2; n < ((struct dtop_dev_vars *)
+			(dpg->priv))->line_count; n++) {
+		dt_dev_parse(((struct dtop_dev_vars *)
+				(dpg->priv))->line[n], line_len[n],
+					index, &dict[index]);
+		index++;
+	}
+
+
+	/* Assigns the dp value to the dp struct */
+	for (n = 2; n < ((struct dtop_dev_vars *)
+			(dpg->priv))->line_count; n++) {
+		for (j = 0; j < 16; j++) {
+			dtop_store_dp(&(dpg->data_points[dp]),
+						dict[n-2].val[j]);
+			dp++;
+		}
+	}
+
+	dt_free(&data);
+	free(line_len);
+	free(dict);
+	return DTOP_POLL_OK;
+}
+
+/**
+ * @brief Frees dynamically allocated "/proc/net/dev" dpg.
+ *
+ * Frees the memory of the dpg along with it's data_points
+ * and other malloc'd memory no longer needed.
+ *
+ * @param dpg Dpg to deconstruct and deallocate memory for.
+ */
+static void dtop_dev_dpg_deconstructor
+			(struct dtop_data_point_gatherer *dpset)
+{
+	int i, j, dp;
+	dp = 0;
+	for (j = 0; j < ((((struct dtop_dev_vars *)
+		(dpset->priv))->line_count)-2); j++) {
+		for (i = 0; i < 16; i++) {
+			free(dpset->data_points[dp].prefix);
+			dp++;
+		}
+	}
+	free(dpset->data_points);
+	for (i = 0; i < ((struct dtop_dev_vars *)
+				(dpset->priv))->line_count; i++)
+		free(((struct dtop_dev_vars *)(dpset->priv))->line[i]);
+	free(((struct dtop_dev_vars *)(dpset->priv))->line);
+	free(((struct dtop_dev_vars *)(dpset->priv)));
+	free(dpset);
+}
+
+/**
+ * @brief Creates a dpg for "/proc/net/dev" file
+ *
+ * Dynamically allocates memory for dpg which is then added to a linked list
+ * via the dtop_register(dpg) function call.
+ *
+ * @param data_points dtop_data_point struct that dpg points to.
+ * @param storage dtop_dev_vars struct that holds relevant dpg variables.
+ */
+static void construct_dev_file_dpg(struct dtop_dev_vars *storage,
+			int dp_count, struct dtop_data_point *data_points)
+{
+	struct dtop_data_point_gatherer *dpg = malloc
+		(sizeof(struct dtop_data_point_gatherer));
+
+	dpg->prefix = "/proc/net/dev";
+	dpg->file = "/proc/net/dev";
+	dpg->poll = dtop_dev_poll;
+	dpg->data_points = data_points;
+	dpg->priv = (struct dtop_dev_vars *)storage;
+	dpg->data_points_len = dp_count;
+	dpg->deconstruct = dtop_dev_dpg_deconstructor;
+
+	dtop_register(dpg);
+}
+
+/**
+ * @brief Scans "/proc/net/dev in order to autodetect dps.
+ *
+ * Searches through "/proc/net/dev" file for all available data
+ * points to create as dp structs.
+ *
+ * @param name This is the file name "/proc/net/dev" passed in by dtop_dev_init
+ * @param storage dtop_dev_vars struct where relevant variables are stored.
+ */
+int dtop_dev_search(char *name, struct dtop_dev_vars *storage)
+{
+	int i, n, sum;
+	char *data;
+	int *line_len = malloc(sizeof(int) * storage->line_count);
+	int read;
+	struct dt_procdict dict;
+	struct dt_procdict dev_dict;
+	struct dtop_data_point *data_points = malloc
+		(sizeof(struct dtop_data_point) * 16 * (storage->line_count-2));
+	int dp_count = (16 * (storage->line_count - 2));
+	int index = 0;
+	int dp = 0;
+
+	storage->line = malloc(storage->line_count * sizeof(*storage->line));
+
+	for (i = 0; i < storage->line_count; i++)
+		storage->line[i] = malloc(sizeof(char) * DTOP_DEV_LINE);
+
+	dev_dict.val[0] = "bytes";
+	dev_dict.val[1] = "packets";
+	dev_dict.val[2] = "errs";
+	dev_dict.val[3] = "drop";
+	dev_dict.val[4] = "fifo";
+	dev_dict.val[5] = "frame";
+	dev_dict.val[6] = "compressed";
+	dev_dict.val[7] = "multicast";
+	dev_dict.val[8] = "bytes";
+	dev_dict.val[9] = "packets";
+	dev_dict.val[10] = "errs";
+	dev_dict.val[11] = "drop";
+	dev_dict.val[12] = "fifo";
+	dev_dict.val[13] = "colls";
+	dev_dict.val[14] = "carrier";
+	dev_dict.val[15] = "compressed";
+
+	read = dt_read_file(name, &data, DTOP_DEV_SIZE);
+	if (read == 0 || data == 0)
+		return DTOP_POLL_IO_ERR;
+
+	sum = 0;
+	/* Assigns each line read from the file, a length */
+	for (n = 0; n < storage->line_count; n++) {
+		line_len[n] = dt_read_line(storage->line[n],
+					   DTOP_DEV_LINE, data,
+					   DTOP_DEV_SIZE, sum);
+		if (n < (storage->line_count - 1))
+			sum += (line_len[n] + 1);
+	}
+
+	construct_dev_file_dpg(storage, dp_count, data_points);
+
+	for (n = 2; n < storage->line_count; n++) {
+		dt_dev_parse(storage->line[n], line_len[n], index, &dict);
+		index++;
+	}
+
+	for (n = 2; n < storage->line_count; n++) {
+		for (i = 0; i < 16; i++) {
+			char *pref = malloc(30 * sizeof(char));
+			data_points[dp].skip = 0;
+			data_points[dp].initial_data_populated = NOT_POPULATED;
+			if (i < 8)
+				strlcpy(pref, "Receive:", 30 * sizeof(char));
+			else if (i >= 8)
+				strlcpy(pref, "Transmit:", 30 * sizeof(char));
+			strlcat(pref, dev_dict.val[i], 30 * sizeof(char));
+			data_points[dp].prefix = pref;
+			data_points[dp].name = dict.key[n-2];
+			data_points[dp].type = DTOP_ULONG;
+			dp++;
+		}
+		index++;
+	}
+
+	free(line_len);
+	dt_free(&data);
+	return DTOP_POLL_OK;
+}
+
+/**
+ * @brief Calls dtop_search for "/proc/net/dev" file.
+ */
+void dtop_dev_init(void)
+{
+	struct dtop_dev_vars *storage = malloc
+			(sizeof(struct dtop_dev_vars));
+	storage->line_count = dtop_get_file_line_amount("/proc/net/dev");
+	dtop_dev_search("/proc/net/dev", storage);
+}
diff --git a/datatop/src/datatop_dual_line_poll.c b/datatop/src/datatop_dual_line_poll.c
new file mode 100644
index 0000000..8ada0c1
--- /dev/null
+++ b/datatop/src/datatop_dual_line_poll.c
@@ -0,0 +1,319 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_dual_line_poll.c
+ * @brief Adds ability for data collection from dual line files.
+ *
+ * File contains methods for searching and polling data from
+ * dual line files, meaning the first line contains the dp names
+ * while the second line contains the corresponding values.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "datatop_interface.h"
+#include "datatop_fileops.h"
+#include "datatop_str.h"
+
+#define DTOP_DUAL_SIZE 8192
+#define DTOP_DUAL_LINE (DTOP_DUAL_SIZE>>2)
+
+/**
+* @struct dtop_dual_line_vars
+* @brief Struct used to hold necessary variables for dual_line_file dpgs.
+*
+* @var dtop_dual_line_vars::line
+* Array of strings where necessary dp names and values are held.
+* @var dtop_dual_line_vars::line2
+* Array of strings where necessary dp names and values are held.
+* @var dtop_dual_line_vars::line_count
+* Number of lines the file is that the dpg represents.
+*/
+struct dtop_dual_line_vars {
+	char **line;
+	char **line2;
+	int line_count;
+};
+
+/**
+ * @brief Stores the data collected from a dual_line file.
+ *
+ * @param dpg Struct that polled data is added to.
+ * @return DTOP_POLL_IO_ERR - Poll of dpg unsuccessful.
+ * @return DTOP_POLL_OK - Poll of dpg successful.
+ */
+int dtop_dual_line_poll(struct dtop_data_point_gatherer *dpg)
+{
+	char *data;
+	int *line_len = malloc(sizeof(int) *
+			((struct dtop_dual_line_vars *)
+			(dpg->priv))->line_count);
+	int *line_len2 = malloc(sizeof(int) *
+			((struct dtop_dual_line_vars *)
+			(dpg->priv))->line_count);
+	int read;
+
+	struct dt_procdict *dict = malloc(sizeof(struct dt_procdict)
+					* (((struct dtop_dual_line_vars *)
+					(dpg->priv))->line_count/2));
+	struct dt_procdict *prefix_dict = malloc(sizeof(struct dt_procdict)
+					* (((struct dtop_dual_line_vars *)
+					(dpg->priv))->line_count/2));
+	int i, j, k, n, sum, sum2;
+
+	read = dt_read_file(dpg->file, &data, DTOP_DUAL_SIZE);
+	if (read == 0 || data == 0)
+		return DTOP_POLL_IO_ERR;
+
+	sum = 0;
+	sum2 = 0;
+	/* Assigns each line read from the file, a length */
+	for (n = 0; n < ((struct dtop_dual_line_vars *)
+				(dpg->priv))->line_count; n++) {
+		line_len[n] = dt_read_line(((struct dtop_dual_line_vars *)
+					(dpg->priv))->line[n],
+					   DTOP_DUAL_LINE, data,
+					   DTOP_DUAL_SIZE, sum);
+		line_len2[n] = dt_read_line(((struct dtop_dual_line_vars *)
+					(dpg->priv))->line2[n],
+					    DTOP_DUAL_LINE, data,
+					    DTOP_DUAL_SIZE, sum2);
+		if (n <= (((struct dtop_dual_line_vars *)
+				(dpg->priv))->line_count-2)) {
+			sum += (line_len[n] + 1);
+			sum2 += (line_len2[n] + 1);
+		}
+
+	}
+
+	/* Stores dp names and values in dictionary */
+	for (i = 0; i < (((struct dtop_dual_line_vars *)
+				(dpg->priv))->line_count/2); i++)
+		dt_parse_proc_dictionary(((struct dtop_dual_line_vars *)
+					(dpg->priv))->line[2*i],
+					  line_len[2*i],
+					  ((struct dtop_dual_line_vars *)
+					  (dpg->priv))->line[(2*i)+1],
+					  line_len[(2*i)+1],
+					  &dict[i]);
+
+	/* Stores dp prefices in dictionary */
+	for (i = 0; i < (((struct dtop_dual_line_vars *)
+				(dpg->priv))->line_count/2); i++)
+		dt_parse_for_prefix(((struct dtop_dual_line_vars *)
+				(dpg->priv))->line2[2*i], line_len2[2*i],
+				    &prefix_dict[i]);
+
+	/* Assigns a dp value to each dp struct */
+	for (k = 0; k < (((struct dtop_dual_line_vars *)
+				(dpg->priv))->line_count/2); k++) {
+		for (j = 0; j < dpg->data_points_len; j++) {
+			i =  dt_find_dict_idx(dpg->data_points[j].name,
+					      &dict[k]);
+			if (i >= 0 && i < dict[k].max &&
+				(strcmp(dpg->data_points[j].prefix,
+				prefix_dict[k].val[i]) == 0))
+
+				dtop_store_dp(&(dpg->data_points[j]),
+					      dict[k].val[i]);
+		}
+	}
+
+	dt_free(&data);
+	free(line_len);
+	free(line_len2);
+	free(dict);
+	free(prefix_dict);
+	return DTOP_POLL_OK;
+}
+
+/**
+ * @brief Frees dynamically allocated dual_line_file dpgs.
+ *
+ * Frees the memory of the dpg along with it's data_points
+ * and other malloc'd memory no longer needed.
+ *
+ * @param dpg Dpg to deconstruct and deallocate memory for.
+ */
+static void dtop_dual_line_dpg_deconstructor
+			(struct dtop_data_point_gatherer *dpset)
+{
+	int i;
+	free(dpset->data_points);
+	for (i = 0; i < ((struct dtop_dual_line_vars *)
+				(dpset->priv))->line_count; i++) {
+		free(((struct dtop_dual_line_vars *)(dpset->priv))->line[i]);
+		free(((struct dtop_dual_line_vars *)(dpset->priv))->line2[i]);
+	}
+	free(((struct dtop_dual_line_vars *)(dpset->priv))->line);
+	free(((struct dtop_dual_line_vars *)(dpset->priv))->line2);
+	free(((struct dtop_dual_line_vars *)(dpset->priv)));
+	free(dpset);
+}
+
+/**
+ * @brief Creates a dpg for a dual_line file.
+ *
+ * Dynamically allocates memory for dpg which is then added to a linked list
+ * via the dtop_register(dpg) function call.
+ *
+ * @param name Name of file dpg represents.
+ * @param data_points dtop_data_point struct that dpg points to.
+ * @param storage dtop_dual_line_vars struct that hold relevant dpg variables.
+ * @param dp_count Number of datapoints in dtop_data_point struct array.
+ */
+static void construct_dual_line_file_dpg(char *name, struct dtop_data_point
+		*data_points, struct dtop_dual_line_vars *storage, int dp_count)
+{
+	struct dtop_data_point_gatherer *dpg = malloc
+		(sizeof(struct dtop_data_point_gatherer));
+	dpg->prefix = name;
+	dpg->file = name;
+	dpg->poll = dtop_dual_line_poll;
+	dpg->data_points = data_points;
+	dpg->priv = (struct dtop_dual_line_vars *)storage;
+	dpg->data_points_len = dp_count;
+	dpg->deconstruct = dtop_dual_line_dpg_deconstructor;
+
+	dtop_register(dpg);
+}
+
+/**
+ * @brief Scans a dual_line file for all datapoints and creats dps.
+ *
+ * Searches through a dual_line file (Key on one line with value on next line)
+ * for all available data points to create as dp structs.
+ *
+ * @param name Name of file.
+ * @param storage dtop_dual_line_vars struct where relevant variables are stored.
+ */
+int dtop_dual_line_search(char *name, struct dtop_dual_line_vars *storage)
+{
+	int i, j, k, n, sum, sum2;
+	char *data;
+	int *line_len = malloc(sizeof(int) * storage->line_count);
+	int *line_len2 = malloc(sizeof(int) * storage->line_count);
+	int read;
+	struct dt_procdict *dict, *prefix_dict;
+	struct dtop_data_point *data_points;
+	int dp_count = 0;
+
+	storage->line = malloc(storage->line_count * sizeof(*storage->line));
+	storage->line2 = malloc(storage->line_count * sizeof(*storage->line2));
+	for (i = 0; i < storage->line_count; i++) {
+		storage->line[i] = malloc(sizeof(char) * DTOP_DUAL_LINE);
+		storage->line2[i] = malloc(sizeof(char) * DTOP_DUAL_LINE);
+	}
+	dict = malloc(sizeof(struct dt_procdict) * (storage->line_count/2));
+	prefix_dict = malloc(sizeof(struct dt_procdict)
+				* (storage->line_count/2));
+
+	read = dt_read_file(name, &data, DTOP_DUAL_SIZE);
+	if (read == 0 || data == 0)
+		return DTOP_POLL_IO_ERR;
+
+	sum = 0;
+	sum2 = 0;
+	/* Assigns each line read from the file, a length */
+	for (n = 0; n < storage->line_count; n++) {
+		line_len[n] = dt_read_line(storage->line[n],
+					   DTOP_DUAL_LINE, data,
+					   DTOP_DUAL_SIZE, sum);
+		line_len2[n] = dt_read_line(storage->line2[n],
+					    DTOP_DUAL_LINE, data,
+					    DTOP_DUAL_SIZE, sum2);
+		if (n <= (storage->line_count-2)) {
+			sum += (line_len[n] + 1);
+			sum2 += (line_len2[n] + 1);
+		}
+
+	}
+
+	/* Stores dp names and prefixes in dictionaries */
+	for (i = 0; i < (storage->line_count/2); i++)
+		dt_parse_proc_dictionary(storage->line[2*i], line_len[2*i],
+			 storage->line[(2*i)+1], line_len[(2*i)+1], &dict[i]);
+
+	for (i = 0; i < (storage->line_count/2); i++)
+		dt_parse_for_prefix(storage->line2[2*i], line_len2[2*i],
+				    &prefix_dict[i]);
+
+	/* Finds how many data points were gathered from the file */
+	for (j = 0; j < (storage->line_count/2); j++) {
+		for (i = 0; i < dict[j].max; i++)
+			dp_count++;
+	}
+
+	data_points = malloc(dp_count * sizeof(struct dtop_data_point));
+
+	k = 0;
+	/* Creates a dtop_data_point struct for each dp found in the file */
+	for (j = 0; j < (storage->line_count/2); j++)
+		for (i = 0; i < dict[j].max; i++) {
+			if (dict[j].val[i][0] == '-')
+				data_points[k].type = DTOP_LONG;
+			else
+				data_points[k].type = DTOP_ULONG;
+			data_points[k].name = dict[j].key[i];
+			data_points[k].prefix = prefix_dict[j].val[i];
+			data_points[k].skip = DO_NOT_SKIP;
+			data_points[k].initial_data_populated = NOT_POPULATED;
+			k++;
+		}
+
+	/* Calls dpg constructor, dpg will point to the dp struct */
+	construct_dual_line_file_dpg(name, data_points, storage, dp_count);
+
+	free(line_len);
+	free(line_len2);
+	free(dict);
+	free(prefix_dict);
+	dt_free(&data);
+
+	return DTOP_POLL_OK;
+}
+
+/**
+ * @brief Calls dtop_search for a file with dual line pairs.
+ */
+void dtop_dual_line_init(char *name)
+{
+	struct dtop_dual_line_vars *storage = malloc
+			(sizeof(struct dtop_dual_line_vars));
+	storage->line_count = dtop_get_file_line_amount(name);
+
+	if (storage->line_count%2 != 0) {
+		printf("Dual line file, %s, contains error.\n", name);
+		printf("Data will not be collected from %s\n", name);
+		return;
+	}
+	dtop_dual_line_search(name, storage);
+}
diff --git a/datatop/src/datatop_fileops.c b/datatop/src/datatop_fileops.c
new file mode 100644
index 0000000..52068f5
--- /dev/null
+++ b/datatop/src/datatop_fileops.c
@@ -0,0 +1,167 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_fileops.c
+ * @brief Declares functions for reading and writing to files.
+ *
+ * Declares functions called when reading from files which data is collected.
+ * Also contains methods to handle files which will be written to.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include "datatop_interface.h"
+#include "datatop_linked_list.h"
+#include "datatop_opt.h"
+#include "datatop_fileops.h"
+
+/**
+ * @brief Reads the lines from files which we are collecting data from.
+ *
+ * @param file File which is read from
+ * @param buffer Pointer to buffer where data will be read. The buffer is allocated
+ *               in dt_read_file() and passed back to the caller. Caller should
+ *               free this when done.
+ * @param len Maximum amount of data which should be read from the file.
+ * @return Number of bytes of data placed in *buffer.
+ */
+int dt_read_file(const char *file, char **buffer, int len)
+{
+	int read;
+	FILE *fp;
+
+	*buffer = (char *)malloc(len);
+	if (!(*buffer)) {
+		fprintf(stderr, "%s(): malloc(%d) failed\n", __func__, len);
+		return 0;
+	}
+
+	fp = fopen(file, "r");
+	if (!fp) {
+		fprintf(stderr, "%s(): Failed to open %s: ", __func__, file);
+		fprintf(stderr, "Error: %s\n", strerror(errno));
+		free(*buffer);
+		*buffer = 0;
+		return 0;
+	}
+	read = fread(*buffer, sizeof(char), len, fp);
+	fclose(fp);
+
+	return read;
+}
+
+/**
+ * @brief Deallocates memory no longer being used.
+ *
+ * @param buffer Buffer to be deallocated.
+ */
+void dt_free(char **buffer)
+{
+	free(*buffer);
+	*buffer = 0;
+}
+
+/**
+ * @brief Checks for access to a file for writing.
+ *
+ * @param fw File to check access of.
+ * @return INVALID - File already exists or write access denied.
+ * @return VALID - File does not exist and can be written to.
+ */
+int dtop_check_writefile_access(char *fw)
+{
+	if (!access(fw, F_OK)) {
+		printf("File specified already exists\n");
+		return INVALID;
+	}
+
+	if (!access(fw, W_OK)) {
+		printf("Permission to write to specified file denied\n");
+		return INVALID;
+	}
+
+	return VALID;
+}
+
+/**
+ * @brief Opens file and handles possible errors.
+ *
+ * @param fw File path to be opened.
+ * @param to_file Pointer to the *file that is opened.
+ * @return VALID - File opened successfully.
+ * @return INVALID - File could not be opened.
+ */
+int dtop_open_writing_file(char *fw, FILE **to_file)
+{
+	*to_file = fopen(fw, "w");
+	if (*to_file) {
+		return VALID;
+	} else {
+		fprintf(stderr, "Value of errno: %d\n", errno);
+		fprintf(stderr, "Error opening file: %s\n", strerror(errno));
+		fprintf(stderr, "Please try writing to a non-existent file\n");
+		printf("See datatop -h for help\n");
+		return INVALID;
+	}
+}
+
+/**
+ * @brief Closes a file if not a standard stream.
+ *
+ * @param fw File to be closed.
+ */
+void dtop_close_file(FILE *fw)
+{
+	if (fw != stdout && fw != stderr && fw != stdin)
+		fclose(fw);
+}
+
+/**
+ * @brief Helper function to find number of lines in dual_line file.
+ *
+ * @return Number of lines in a dual_line file.
+ */
+int dtop_get_file_line_amount(char *name)
+{
+	signed char rc = -1;
+	int line_count = 0;
+	FILE *file = fopen(name, "r");
+	while (rc != EOF) {
+		if (rc == '\n')
+			line_count++;
+		rc = fgetc(file);
+	}
+
+	fclose(file);
+	return line_count;
+}
diff --git a/datatop/src/datatop_fileops.h b/datatop/src/datatop_fileops.h
new file mode 100644
index 0000000..0078e06
--- /dev/null
+++ b/datatop/src/datatop_fileops.h
@@ -0,0 +1,48 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_fileops.h
+ * @brief Declares functions held within datatop_fileops.h
+ */
+
+#ifndef DATATOP_FILEOPS_H
+#define DATATOP_FILEOPS_H
+
+#include "datatop_interface.h"
+#include "datatop_linked_list.h"
+#include "datatop_opt.h"
+
+int dt_read_file(const char *file, char **buffer, int len);
+void dt_free(char **buffer);
+int dtop_check_writefile_access(char *fw);
+int dtop_open_writing_file(char *fw, FILE **to_file);
+void dtop_close_file(FILE *fw);
+int dtop_get_file_line_amount(char *file);
+#endif /* DATATOP_FILEOPS_H */
diff --git a/datatop/src/datatop_gen_poll.c b/datatop/src/datatop_gen_poll.c
new file mode 100644
index 0000000..457cc35
--- /dev/null
+++ b/datatop/src/datatop_gen_poll.c
@@ -0,0 +1,276 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_gen_poll.c
+ * @brief Contains functions which add ability to scan directories for data points.
+ *
+ * Contains functions that search through a directory and create dpg's for any
+ * important data values found which can then be polled for data collection.
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <dirent.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include "datatop_interface.h"
+#include "datatop_fileops.h"
+#include "datatop_str.h"
+#include "datatop_gen_poll.h"
+
+#define DTOP_GEN_SIZE 8192
+#define DTOP_GEN_LINE (DTOP_GEN_SIZE>>2)
+
+/**
+ * @brief Searches a file to find the number of data values it contains.
+ *
+ * @param dpg The struct which contains the file to search.
+ * @return Number of datapoints found in the file.
+ */
+static int get_number_of_values(struct dtop_data_point_gatherer *dpg)
+{
+	char *data;
+	int read;
+	char line[DTOP_GEN_LINE];
+	int line_len;
+	int i, num;
+
+	read = dt_read_file(dpg->file, &data, DTOP_GEN_SIZE);
+	line_len = dt_read_line(line, DTOP_GEN_LINE, data, DTOP_GEN_SIZE, 0);
+
+	if (line_len < 1) {
+		dt_free(&data);
+		return 0;
+	}
+
+	num = 1;
+	for (i = 0; i < line_len; i++) {
+		if ((line[i] == ' ' || line[i] == ','
+		    || line[i] == '	') &&line[i+1] != 0)
+			num++;
+	}
+
+	dt_free(&data);
+	return num;
+}
+
+/**
+ * @brief Stores the data collected from a dpg that was constructed during dtop_search.
+ *
+ * @param dpg Struct that polled data is added to.
+ * @return DTOP_POLL_IO_ERR - Poll of dpg unsuccessful.
+ * @return DTOP_POLL_OK - Poll of dpg successful.
+ */
+int dtop_gen_poll(struct dtop_data_point_gatherer *dpg)
+{
+	char *data;
+	int read;
+	char line[DTOP_GEN_LINE];
+	int line_len;
+	struct dt_procdict dict;
+	int i;
+
+	read = dt_read_file(dpg->file, &data, DTOP_GEN_SIZE);
+	line_len = dt_read_line(line, DTOP_GEN_LINE, data, DTOP_GEN_SIZE, 0);
+
+	if (read == 0 || data == 0)
+		return DTOP_POLL_IO_ERR;
+
+	dt_single_line_parse(line, line_len, &dict);
+
+	for (i = 0; i < dpg->data_points_len; i++) {
+		if (dict.val[i][0] == '-')
+			dpg->data_points[i].type = DTOP_LONG;
+		dtop_store_dp(&(dpg->data_points[i]), dict.val[i]);
+	}
+
+	dt_free(&data);
+	return DTOP_POLL_OK;
+}
+
+/**
+ * @brief Frees dynamically allocated dpg's.
+ *
+ * Frees the memory of dpg variables and the dpg for all dynamically allocated
+ * dpgs.
+ *
+ * @param dpg Dpg to deconstruct and deallocate memory for.
+ */
+static void dtop_gen_dpg_deconstructor(struct dtop_data_point_gatherer *dpset)
+{
+	int i;
+	for (i = 0; i < dpset->data_points_len; i++)
+		free(dpset->data_points[i].name);
+	free(dpset->data_points);
+	free(dpset->file);
+	free(dpset->prefix);
+	free(dpset);
+}
+
+/**
+ * @brief Creates a dpg and all necessary dp's corresponding to it.
+ *
+ * Dynamically allocates memory for dpg and dp structs which are then
+ * created and added to a linked_list of dpgs through the dtop_register
+ * function.
+ *
+ * @param dir Directory which file is located in, assigned to the dpg prefix.
+ * @param name Name of file that dpg represents, assigned to a dp name.
+ */
+static void dpg_construction(char *dir, char *name)
+{
+	int num, i;
+	int both_len = strlen(dir) + strlen(name) + 1;
+	char *both = malloc(both_len);
+	char *maindir;
+	struct dtop_data_point_gatherer *dpg = malloc
+	       (sizeof(struct dtop_data_point_gatherer));
+	strlcpy(both, dir, both_len);
+	strlcat(both, name, both_len);
+	maindir = malloc(strlen(dir) + 1);
+	strlcpy(maindir, dir, strlen(dir) + 1);
+
+	dpg->prefix = maindir;
+	dpg->file = both;
+	dpg->poll = dtop_gen_poll;
+	dpg->deconstruct = dtop_gen_dpg_deconstructor;
+	num = get_number_of_values(dpg);
+
+	if (num != 0) {
+		struct dtop_data_point *dp = malloc
+		       (num * sizeof(struct dtop_data_point));
+		for (i = 0; i < num; i++) {
+			if (num == 1) {
+				dp[i].name = malloc(strlen(name) + 1);
+				strlcpy(dp[i].name, name, strlen(name) + 1);
+			} else {
+				char *add = malloc(7 * sizeof(char));
+				char *newname;
+				int nn_len, dpn_len;
+				snprintf(add, 7 * sizeof(char), "[%d]:", i);
+				nn_len = strlen(name) + strlen(add) + 1;
+				newname = malloc(nn_len);
+				strlcpy(newname, name, nn_len);
+				strlcat(newname, add, nn_len);
+				dpn_len = strlen(newname) + 1;
+				dp[i].name = malloc(dpn_len);
+				strlcpy(dp[i].name, newname, dpn_len);
+				free(add);
+				free(newname);
+			}
+			dp[i].prefix = NULL;
+			dp[i].type = DTOP_ULONG;
+			dp[i].skip = DO_NOT_SKIP;
+			dp[i].initial_data_populated = NOT_POPULATED;
+		}
+
+		dpg->data_points = dp;
+		dpg->data_points_len = num;
+
+		dtop_register(dpg);
+	} else {
+		free(dpg->prefix);
+		free(dpg->file);
+		free(dpg);
+	}
+}
+
+/**
+ * @brief Scans a directory for all important datapoints to be collected.
+ *
+ * Recursively scans a directory and locates all files which data will be
+ * collected from.
+ *
+ * @param dir Directory to search.
+ */
+static int dtop_search(char *dir)
+{
+	DIR *dp;
+	struct dirent *entry;
+	struct stat s;
+	char cwd[1024];
+
+	if (!getcwd(cwd, sizeof(cwd))) {
+		fprintf(stderr, "Failed to get current working dir\n");
+		return -1;
+	}
+
+	dp = opendir(dir);
+	if (dp == NULL) {
+		fprintf(stderr, "err=%d: %s\n", errno, strerror(errno));
+		fprintf(stderr, "Cannot open directory: %s\n", dir);
+		return DIR_FAILURE;
+	}
+
+	chdir(dir);
+
+	while ((entry = readdir(dp))) {
+		if (stat(entry->d_name, &s)) {
+			printf("stat err=%d: %s\n", errno, strerror(errno));
+			return DIR_FAILURE;
+		}
+
+		if (strcmp(".", entry->d_name) != 0 &&
+		   strcmp("..", entry->d_name) != 0 &&
+		   S_ISREG(s.st_mode)) {
+
+			dpg_construction(dir, entry->d_name);
+
+		} else if (strcmp(".", entry->d_name) != 0 &&
+			strcmp("..", entry->d_name) != 0 &&
+			S_ISDIR(s.st_mode)) {
+			int nd_len = strlen(dir) + strlen(entry->d_name) + 2;
+			char *newdir = malloc(nd_len);
+			strlcpy(newdir, dir, nd_len);
+			strlcat(newdir, entry->d_name, nd_len);
+			strlcat(newdir, "/", nd_len);
+			dtop_search(newdir);
+			free(newdir);
+		}
+	}
+
+	closedir(dp);
+	chdir(cwd);
+	return DIR_SUCCESS;
+}
+
+/**
+ * @brief Calls dtop_search for any specified directory.
+ *
+ * @param dir Directory to search.
+ */
+void dtop_gen_init(char *dir)
+{
+	dtop_search(dir);
+}
diff --git a/datatop/src/datatop_gen_poll.h b/datatop/src/datatop_gen_poll.h
new file mode 100644
index 0000000..6baffc9
--- /dev/null
+++ b/datatop/src/datatop_gen_poll.h
@@ -0,0 +1,43 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_gen_poll.h
+ * @brief Declares functions held within datatop_gen_poll.c
+ */
+
+#ifndef DATATOP_GEN_POLL_H
+#define DATATOP_GEN_POLL_H
+
+#define DIR_SUCCESS 0
+#define DIR_FAILURE 1
+
+void dtop_gen_init(char *dir);
+#endif /*  DATATOP_GEN_POLL_H */
+
diff --git a/datatop/src/datatop_helpers.c b/datatop/src/datatop_helpers.c
new file mode 100644
index 0000000..55fbb09
--- /dev/null
+++ b/datatop/src/datatop_helpers.c
@@ -0,0 +1,493 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_helpers.c
+ * @brief Contains functions which output data.
+ *
+ * Contains functions which are used for printing data to output streams.
+ * Handles all formatting for data output. Also contains functions which
+ * are responsible for data gathering and collection.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <sys/time.h>
+#include <string.h>
+#include <errno.h>
+#include "datatop_interface.h"
+#include "datatop_linked_list.h"
+#include "datatop_fileops.h"
+
+/**
+ * @brief Prints the name and prefix of a datapoint.
+ *
+ * @param dp Dp whose name and prefix is printed.
+ * @param prefix Directory where dp is contained.
+ * @param fw File to print the information to.
+ * @return FILE_ERROR - Writing to file was unsuccessful.
+ * @return FILE_SUCCESS - Writing to file was successful.
+ */
+static int dtop_format_dp_names(struct dtop_data_point *dp, const char
+						*prefix, FILE *fw)
+{
+	if (dp->prefix) {
+		if (fprintf(fw, "\"%s:%s:%s\",", prefix, dp->prefix,
+							dp->name) < 0)
+			return FILE_ERROR;
+	} else {
+		if (fprintf(fw, "\"%s::%s\",", prefix, dp->name) < 0)
+			return FILE_ERROR;
+	}
+	return FILE_SUCCESS;
+}
+
+/**
+ * @brief Prints the value of a datapoint.
+ *
+ * Checks the type of the value and will print it accordingly.
+ *
+ * @param dp Pointer to the data_point struct which holds the value that will
+ *           be printed.
+ * @param fw File to print the information to.
+ * @return FILE_ERROR - Writing to file was unsuccessful.
+ * @return FILE_SUCCESS - Writing to file was successful.
+ */
+static int dtop_format_dp_values(struct dtop_data_point *dp, FILE *fw)
+{
+	switch (dp->type) {
+	case DTOP_ULONG:
+		if (fprintf(fw, "%lu", dp->data.d_ulong) < 0)
+			return FILE_ERROR;
+	break;
+	case DTOP_LONG:
+		if (fprintf(fw, "%ld", dp->data.d_long) < 0)
+			return FILE_ERROR;
+	break;
+	case DTOP_UINT:
+		if (fprintf(fw, "%d", dp->data.d_uint) < 0)
+			return FILE_ERROR;
+	break;
+	case DTOP_INT:
+		if (fprintf(fw, "%u", dp->data.d_uint) < 0)
+			return FILE_ERROR;
+	break;
+	case DTOP_UCHAR:
+		if (fprintf(fw, "%c,", dp->data.d_uchar) < 0)
+			return FILE_ERROR;
+		if (fprintf(fw, "(0x%02X)", dp->data.d_uchar) < 0)
+			return FILE_ERROR;
+	break;
+	case DTOP_CHAR:
+		if (fprintf(fw, "%c,", dp->data.d_char) < 0)
+			return FILE_ERROR;
+		if (fprintf(fw, "(%d)", dp->data.d_char) < 0)
+			return FILE_ERROR;
+	break;
+	case DTOP_STR:
+		if (fprintf(fw, "\"%s\"", dp->data.d_str) < 0)
+			return FILE_ERROR;
+	break;
+	default:
+		if (fprintf(fw, "UNKNOWN_TYPE") < 0)
+			return FILE_ERROR;
+	break;
+	}
+	return FILE_SUCCESS;
+}
+
+/**
+ * @brief Prints the name and prefix of a dp, formatted appropriately.
+ *
+ * @param dpset data_point_gatherer used to access dp directory.
+ * @param dp data_point used to get datapoint prefix if available.
+ */
+static void dtop_format_text_for_snapshot
+	(struct dtop_data_point_gatherer *dpset, struct dtop_data_point dp)
+{
+	printf("%s:", dpset->prefix);
+	if (dp.prefix)
+		printf("%s:", dp.prefix);
+
+	printf("%s::", dp.name);
+}
+
+/**
+ * @brief Prints a datapoint value to a specified csv file.
+ *
+ * @param dp Datapoint that holds the value to be printed.
+ * @param fw File to print to.
+ * @return FILE_ERROR - Writing to file was unsuccessful.
+ * @return FILE_SUCCESS - Writing to file was successful.
+ */
+static int dtop_print_dp_csv(struct dtop_data_point *dp, FILE *fw)
+{
+	if (dtop_format_dp_values(dp, fw) == FILE_ERROR)
+		return FILE_ERROR;
+	if (fprintf(fw, ",") < 0)
+		return FILE_ERROR;
+	return FILE_SUCCESS;
+}
+
+/**
+ * @brief Prints a datapoint value to the terminal.
+ *
+ * @param dp Holds the value to be printed print.
+ * @param prefix Used to print prefix of the data_point.
+ */
+static void dtop_print_dp(struct dtop_data_point *dp, const char *prefix)
+{
+	dtop_format_dp_names(dp, prefix, stdout);
+	printf(" ");
+	dtop_format_dp_values(dp, stdout);
+	printf("\n");
+}
+
+/**
+ * @brief Finds delta(value) of a datapoint.
+ *
+ * Function accounts for different types that values may be.
+ *
+ * @param dpset Pointer to a data_point used as another parameter for printing.
+ * @param dp Datapoint which contains the value to find the difference of.
+ */
+static void dtop_handle_dp_type_for_snapshot(
+	struct dtop_data_point_gatherer *dpset, struct dtop_data_point dp)
+{
+	int64_t int64;
+
+	switch (dp.type) {
+	case DTOP_ULONG:
+	default:
+		/* This is less than ideal. Replace with 128-bit ops later */
+		int64 = (int64_t)dp.data.d_ulong
+			- (int64_t)dp.initial_data.d_ulong;
+		if (int64 != 0) {
+			dtop_format_text_for_snapshot(dpset, dp);
+			#if (__SIZEOF_LONG__ == 4)
+				printf("%lld\n", int64);
+			#elif (__SIZEOF_LONG__ == 8)
+				printf("%ld\n", int64);
+			#endif
+		}
+	break;
+
+	case DTOP_LONG:
+		/* This is less than ideal. Replace with 128-bit ops later */
+		int64 = (int64_t)dp.data.d_long
+			- (int64_t)dp.initial_data.d_long;
+		if (int64 != 0) {
+			dtop_format_text_for_snapshot(dpset, dp);
+			#if (__SIZEOF_LONG__ == 4)
+				printf("%lld\n", int64);
+			#elif (__SIZEOF_LONG__ == 8)
+				printf("%ld\n", int64);
+			#endif
+		}
+	break;
+
+	case DTOP_UINT:
+		int64 = (int64_t)dp.data.d_uint
+			- (int64_t)dp.initial_data.d_uint;
+		if (int64 != 0) {
+			dtop_format_text_for_snapshot(dpset, dp);
+			#if (__SIZEOF_LONG__ == 4)
+				printf("%lld\n", int64);
+			#elif (__SIZEOF_LONG__ == 8)
+				printf("%ld\n", int64);
+			#endif
+		}
+	break;
+
+	case DTOP_INT:
+		int64 = (int64_t)dp.data.d_int
+			- (int64_t)dp.initial_data.d_int;
+		if (int64 != 0) {
+			dtop_format_text_for_snapshot(dpset, dp);
+			#if (__SIZEOF_LONG__ == 4)
+				printf("%lld\n", int64);
+			#elif (__SIZEOF_LONG__ == 8)
+				printf("%ld\n", int64);
+			#endif
+		}
+	break;
+	}
+}
+
+/**
+ * @brief Calls the dtop_print_dp_csv function for each data_point a dpg has access to.
+ *
+ * @param dpg A data_point_gatherer struct that is iterated through for each datapoint.
+ * @param fw File to print datapoint values to.
+ * @return FILE_ERROR - Writing to file was unsuccessful.
+ * @return FILE_SUCCESS - Writing to file was successful.
+ */
+static int dtop_print_dpg_csv(struct dtop_data_point_gatherer *dpg, FILE *fw)
+{
+	int i;
+
+	for (i = 0; i < dpg->data_points_len; i++)
+		if (dtop_print_dp_csv(&(dpg->data_points[i]), fw) == FILE_ERROR)
+			return FILE_ERROR;
+	return FILE_SUCCESS;
+}
+
+/**
+ * @brief Calls the dtop_format_dp_names function for each data_point a dpg has access to.
+ *
+ * @param dpg A data_point_gatherer struct that is iterated through for each datapoint.
+ * @param fw File to printg datapoint names and prefixes to.
+ * @return FILE_ERROR - Writing to file was unsuccessful.
+ * @return FILE_SUCCESS - Writing to file was successful.
+ */
+int dtop_print_dpg_names_csv(struct dtop_data_point_gatherer *dpg, FILE *fw)
+{
+	int i;
+
+	for (i = 0; i < dpg->data_points_len; i++)
+		if (dtop_format_dp_names(&(dpg->data_points[i]),
+		dpg->prefix, fw) == FILE_ERROR)
+			return FILE_ERROR;
+
+	return FILE_SUCCESS;
+}
+
+/**
+ * @brief Prints all dp values to a specified file.
+ *
+ * This function is responsible for the printing of all data_point values
+ * to a specified file. It will iterate through the linked list which contains
+ * all of the dpgs and will print each dp value, being sure to flush the buffer.
+ *
+ * @param dpg_list Pointer to first node of linked list which contains all dpgs.
+ * @param fw File that data prints to.
+ * @return FILE_ERROR - Writing to file was unsuccessful.
+ * @return FILE_SUCCESS - Writing to file was successful.
+ */
+int dtop_write_pollingdata_csv(struct dtop_linked_list *dpg_list, FILE *fw)
+{
+	struct dtop_linked_list *curr_ptr = dpg_list;
+	struct dtop_data_point_gatherer *dpset;
+
+	while (curr_ptr) {
+		dpset = (struct dtop_data_point_gatherer *) curr_ptr->data;
+		if (dtop_print_dpg_csv(dpset, fw) == FILE_ERROR)
+			return FILE_ERROR;
+		curr_ptr = curr_ptr->next_ptr;
+		fflush(fw);
+	}
+
+	if (fprintf(fw, "\n") < 0)
+		return FILE_ERROR;
+
+	return FILE_SUCCESS;
+}
+
+/**
+ * @brief Calls the dtop_print_dp function for each data_point a dpg has access to.
+ *
+ * @param dpg A data_point_gatherer struct that is iterated through for each datapoint.
+ */
+void dtop_print_dpg(struct dtop_data_point_gatherer *dpg)
+{
+	int i;
+	for (i = 0; i < dpg->data_points_len; i++)
+		dtop_print_dp(&(dpg->data_points[i]), dpg->prefix);
+}
+
+/**
+ * @brief Stores the values for the datapoints and populates the initial value.
+ *
+ * @param dp A datapoint whose value will be stored.
+ * @param str Str used for sscanf function call to find value of dp.
+ */
+void dtop_store_dp(struct dtop_data_point *dp, const char *str)
+{
+	switch (dp->type) {
+	case DTOP_ULONG:
+		sscanf(str, "%lu", &(dp->data.d_ulong));
+		if (dp->initial_data_populated == NOT_POPULATED) {
+			dp->initial_data.d_ulong = dp->data.d_ulong;
+			dp->initial_data_populated = POPULATED;
+		}
+	break;
+	case DTOP_LONG:
+		sscanf(str, "%ld", &(dp->data.d_long));
+		if (dp->initial_data_populated == NOT_POPULATED) {
+			dp->initial_data.d_long = dp->data.d_long;
+			dp->initial_data_populated = POPULATED;
+		}
+	break;
+	case DTOP_UINT:
+		sscanf(str, "%u",  &(dp->data.d_uint));
+		if (dp->initial_data_populated == NOT_POPULATED) {
+			dp->initial_data.d_uint = dp->data.d_uint;
+			dp->initial_data_populated = POPULATED;
+		}
+	break;
+	case DTOP_INT:
+		sscanf(str, "%d",  &(dp->data.d_int));
+		if (dp->initial_data_populated == NOT_POPULATED) {
+			dp->initial_data.d_int = dp->data.d_int;
+			dp->initial_data_populated = POPULATED;
+		}
+	break;
+	case DTOP_UCHAR:
+		sscanf(str, "%c",  &(dp->data.d_uchar));
+		if (dp->initial_data_populated == NOT_POPULATED) {
+			dp->initial_data.d_uchar = dp->data.d_uchar;
+			dp->initial_data_populated = POPULATED;
+		}
+	break;
+	case DTOP_CHAR:
+		sscanf(str, "%c",  &(dp->data.d_char));
+		if (dp->initial_data_populated == NOT_POPULATED) {
+			dp->initial_data.d_char = dp->data.d_char;
+			dp->initial_data_populated = POPULATED;
+		}
+	break;
+	case DTOP_STR:
+		sscanf(str, "%s",  dp->data.d_str);
+		if (dp->initial_data_populated == NOT_POPULATED) {
+			memcpy(dp->initial_data.d_str, dp->data.d_str,
+			       DTOP_DP_MAX_STR_LEN);
+			dp->initial_data_populated = POPULATED;
+		}
+	break;
+	default:
+	break;
+	}
+}
+
+/**
+ * @brief Responsible for calculating and printing current time to file.
+ *
+ * Prints the time since 1970, in Seconds and Milliseconds.
+ *
+ * @param fw File that time is printed to.
+ * @return FILE_ERROR - Writing to file was unsuccessful.
+ * @return FILE_SUCCESS - Writing to file was successful.
+ */
+int dtop_print_time_at_poll(FILE *fw)
+{
+	struct timeval tv;
+	gettimeofday(&tv, NULL);
+
+	if (fprintf(fw, "%10ld", tv.tv_sec) < 0)
+		return FILE_ERROR;
+
+	if (fprintf(fw, ".%06ld,", tv.tv_usec) < 0)
+		return FILE_ERROR;
+
+	return FILE_SUCCESS;
+}
+
+/**
+ * @brief Polls all dp values and updates each value.
+ *
+ * @param dpg_list Pointer to first node of linked list which contains all dpgs.
+ */
+void dtop_poll(struct dtop_linked_list *dpg_list)
+{
+	struct dtop_linked_list *curr_ptr = dpg_list;
+	struct dtop_data_point_gatherer *dpset;
+
+	while (curr_ptr) {
+		dpset = (struct dtop_data_point_gatherer *) curr_ptr->data;
+		dpset->poll(dpset);
+		curr_ptr = curr_ptr->next_ptr;
+	}
+}
+
+/**
+ * @brief Prints the delta(value) of all data_points to terminal.
+ *
+ * @param dpg_list Pointer to first node of linked list which contains all dpgs.
+ */
+void dtop_print_snapshot_diff(struct dtop_linked_list *dpg_list)
+{
+	int i;
+
+	struct dtop_linked_list *curr_ptr = dpg_list;
+	struct dtop_data_point_gatherer *dpset;
+	printf("\n");
+	printf("Change In Datapoint Values\n");
+	printf("---------------------------\n");
+	while (curr_ptr) {
+		dpset = (struct dtop_data_point_gatherer *) curr_ptr->data;
+		for (i = 0; i < dpset->data_points_len; i++)
+			dtop_handle_dp_type_for_snapshot(dpset,
+					  dpset->data_points[i]);
+		curr_ptr = curr_ptr->next_ptr;
+	}
+	printf("\n");
+}
+
+/**
+ * @brief Resets the initial values of all data_points.
+ *
+ * @param dpg_list Pointer to first node of linked list which contains all dpgs.
+ */
+void dtop_reset_dp_initial_values(struct dtop_linked_list *dpg_list)
+{
+	int i;
+
+	struct dtop_linked_list *curr_ptr = dpg_list;
+	struct dtop_data_point_gatherer *dpset;
+
+	while (curr_ptr) {
+		dpset = (struct dtop_data_point_gatherer *) curr_ptr->data;
+		for (i = 0; i < dpset->data_points_len; i++)
+			dpset->data_points[i].initial_data_populated
+							= NOT_POPULATED;
+		curr_ptr = curr_ptr->next_ptr;
+	}
+}
+
+/**
+ * @brief Calls deconstructor method for all dpgs dynamically created.
+ *
+ * Checks to see if each dpg created has a deconstructor method. If not null,
+ * function calls the appropiate deconstructor method to deallocate memory.
+ *
+ * @param dpg_list Pointer to first node of linked list which contains all dpgs.
+ */
+void deconstruct_dpgs(struct dtop_linked_list *dpg_list)
+{
+	struct dtop_linked_list *curr_ptr = dpg_list;
+	struct dtop_data_point_gatherer *dpset;
+
+	while (curr_ptr) {
+		dpset = (struct dtop_data_point_gatherer *) curr_ptr->data;
+		if (dpset->deconstruct)
+			dpset->deconstruct(dpset);
+		curr_ptr = curr_ptr->next_ptr;
+	}
+}
diff --git a/datatop/src/datatop_interface.h b/datatop/src/datatop_interface.h
new file mode 100644
index 0000000..b3a3966
--- /dev/null
+++ b/datatop/src/datatop_interface.h
@@ -0,0 +1,159 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_interface.h
+ * @brief Declares functions held within datatop.c and datatop_helpers.c
+ *
+ * Declares functions which are held within datatop.c and datatop_helpers.c.
+ * Also defines data structures used for storing data gathered during polling
+ * such as datapoint names, values, and prefixes along with other valuable
+ * information.
+ */
+
+#ifndef DATATOP_INTERFACE_H
+#define DATATOP_INTERFACE_H
+
+#include <inttypes.h>
+#include "datatop_linked_list.h"
+
+#define DTOP_ULONG 0
+#define DTOP_LONG  1
+#define DTOP_UINT  2
+#define DTOP_INT   3
+#define DTOP_UCHAR 4
+#define DTOP_CHAR  5
+#define DTOP_STR   6
+
+#define FILE_ERROR       -1
+#define FILE_SUCCESS      0
+#define SKIP              1
+#define DO_NOT_SKIP       0
+#define POPULATED         1
+#define NOT_POPULATED     0
+
+#define DTOP_POLL_OK      0
+#define DTOP_POLL_IO_ERR  1
+#define NOT_CHECKED       0
+
+#define QUIT              1
+
+#define DTOP_DP_MAX_STR_LEN 32
+
+#define DTOP_DP_HFILL   .initial_data_populated = NOT_POPULATED, \
+			.skip = 0
+
+/**
+ * @struct dtop_data_union
+ * @brief Provides the type for dp value.
+ */
+union dtop_data_union {
+	uint64_t d_ulong;
+	int64_t d_long;
+	uint32_t d_uint;
+	int32_t d_int;
+	uint8_t d_uchar;
+	int8_t d_char;
+	char d_str[DTOP_DP_MAX_STR_LEN];
+};
+
+/**
+ * @struct dtop_data_point
+ * @brief Individual datapoint in a file.
+ *
+ * @var dtop_data_point::name
+ * Stores the datapoints name.
+ * @var dtop_data_point::prefix
+ * Stores the individual prefix for the dp.
+ * @var dtop_data_point::type
+ * Type dp value is, see definitions.
+ * @var dtop_data_point::initial_data
+ * Holds the initial value of the dp the first time it was polled.
+ * @var dtop_data_point::initial_data_populated
+ * Variable that is changed when initial_data is populated.
+ * @var dtop_data_point::data
+ * Value of the dp at the most recent poll.
+ */
+struct dtop_data_point {
+	char *name;
+	char *prefix;
+
+	/* Results of polling */
+	char type;
+	union dtop_data_union initial_data;
+	char initial_data_populated;
+	union dtop_data_union data;
+
+	/* Skip on subsequent polls */
+	char skip;
+};
+
+/**
+ * @struct dtop_data_point_gatherer
+ * @brief Struct used to hold data about a set of collected data.
+ *
+ * @var dtop_data_point_gatherer::prefix
+ * Name of directory which data is collected from.
+ * @var dtop_data_point_gatherer::file
+ * File path that data is collected from.
+ * @var dtop_data_point_gatherer::poll
+ * Poll function takes a dtop_data_point_gatherer as parameter.
+ * int equals, DTOP_POLL_IO_ERR - Poll of dpg unsuccessful, or
+ * DTOP_POLL_OK - Poll of dpg successful.
+ * @var dtop_data_point_gatherer::data_points
+ * Pointer to a dtop_data_point struct (dp).
+ * @var dtop_data_point_gatherer::data_points_len
+ * Number of elements in the array of dp's the dpg accesses.
+ */
+struct dtop_data_point_gatherer {
+	char *prefix;
+	char *file;
+	int (*poll)(struct dtop_data_point_gatherer *dpg);
+	void (*deconstruct)(struct dtop_data_point_gatherer *dpg);
+
+	struct dtop_data_point *data_points;
+	int data_points_len;
+
+	/* Private data */
+	void *priv;
+};
+
+void dtop_register(struct dtop_data_point_gatherer *dpg);
+void dtop_store_dp(struct dtop_data_point *dp, const char *str);
+void dtop_print_dpg(struct dtop_data_point_gatherer *dpg);
+void get_snapshot_diff(struct dtop_linked_list *dpg_list);
+void dtop_print_snapshot_diff(struct dtop_linked_list *dpg_list);
+void dtop_poll(struct dtop_linked_list *dpg_list);
+int dtop_print_time_at_poll(FILE *fw);
+int dtop_print_dpg_names_csv(struct dtop_data_point_gatherer *dpg, FILE *fw);
+int dtop_write_pollingdata_csv(struct dtop_linked_list *dpg_list, FILE *fw);
+void dtop_reset_dp_initial_values(struct dtop_linked_list *dpg_list);
+void deconstruct_dpgs(struct dtop_linked_list *dpg_list);
+int dtop_print_system_snapshot(char *file);
+#endif /*  DATATOP_INTERFACE_H */
diff --git a/datatop/src/datatop_linked_list.c b/datatop/src/datatop_linked_list.c
new file mode 100644
index 0000000..7e5b632
--- /dev/null
+++ b/datatop/src/datatop_linked_list.c
@@ -0,0 +1,84 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_linked_list.c
+ * @brief Necessary linked_list functions created.
+ *
+ * Holds function which adds to or creates a linked list
+ * used for storing dtop_data_point_gatherer's (dpg's).
+ * Datapoints are stored in linked list for ability to
+ * iteratively poll and print efficiently. Handles creation
+ * and deletion of memory for linked list nodes.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "datatop_linked_list.h"
+
+/**
+ * @brief Adds a node to the beginning of a linked list.
+ *
+ * @param data A void pointer which can hold any data in the node.
+ * @param list The list that is added to.
+ * @return Updated linked list struct.
+ */
+struct dtop_linked_list *dtop_add_linked_list(void *data,
+				struct dtop_linked_list *list)
+{
+	struct dtop_linked_list *list_node;
+	list_node = malloc(sizeof(struct dtop_linked_list));
+
+	if (!list_node) {
+		fprintf(stderr, "failed to allocate memory.\n");
+		exit(EXIT_FAILURE);
+	}
+
+	list_node->data = data;
+	list_node->next_ptr = list;
+	list = list_node;
+	return list;
+}
+
+/**
+ * @brief Deletes a linked list.
+ *
+ * @param head_ptr Pointer to the first node in the linked list that is to be deleted.
+ */
+void dtop_rem_linked_list(struct dtop_linked_list *head_ptr)
+{
+	struct dtop_linked_list *tmp_ptr = NULL;
+	while (head_ptr) {
+		tmp_ptr = head_ptr;
+		head_ptr = head_ptr->next_ptr;
+		free(tmp_ptr);
+	}
+}
diff --git a/datatop/src/datatop_linked_list.h b/datatop/src/datatop_linked_list.h
new file mode 100644
index 0000000..4386d02
--- /dev/null
+++ b/datatop/src/datatop_linked_list.h
@@ -0,0 +1,59 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_linked_list.h
+ * @brief Defines linked list struct and declares linked list methods.
+ *
+ * Defines linked list struct which can be used for any data
+ * storage. Declares methods held within datatop_linked_list.c.
+ */
+
+#ifndef DATATOP_LINKED_LIST_H
+#define DATATOP_LINKED_LIST_H
+
+/**
+ * @struct dtop_linked_list
+ * @brief Struct used to represent linked list node that stores a pointer with any type.
+ *
+ * @var dtop_linked_list::next_ptr
+ * Pointer to next node in the list.
+ * @var dtop_linked_list::data
+ * Pointer to data the node stores.
+ */
+struct dtop_linked_list {
+	struct dtop_linked_list *next_ptr;
+	void *data;
+};
+
+struct dtop_linked_list *dtop_add_linked_list(void *data,
+				struct dtop_linked_list *list);
+void dtop_rem_linked_list(struct dtop_linked_list *head_ptr);
+#endif /* DATATOP_LINKED_LIST_H */
+
diff --git a/datatop/src/datatop_meminfo_file_poll.c b/datatop/src/datatop_meminfo_file_poll.c
new file mode 100644
index 0000000..bef1c5d
--- /dev/null
+++ b/datatop/src/datatop_meminfo_file_poll.c
@@ -0,0 +1,280 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_meminfo_file_poll.c
+ * @brief Adds ability for data collection from /proc/meminfo
+ *
+ * File contains methods for searching and polling data from
+ * "/proc/meminfo"
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "datatop_interface.h"
+#include "datatop_fileops.h"
+#include "datatop_str.h"
+
+#define DTOP_MEM_SIZE 8192
+#define DTOP_MEM_LINE (DTOP_MEM_SIZE>>2)
+
+/**
+* @struct dtop_meminfo_vars
+* @brief Struct used to hold necessary variables for /proc/meminfo dpg
+*
+* @var dtop_meminfo_vars::line
+* Array of strings where necessary dp names and values are held.
+* @var dtop_meminfo_vars::line_count
+* Number of lines the file is that the dpg represents.
+*/
+struct dtop_meminfo_vars {
+	char **line;
+	int line_count;
+};
+
+/**
+ * @brief Parses lines with data in "/proc/meminfo"
+ *
+ * @param line1 Line to parse to find datapoint names and values.
+ * @param len1 Length of line1.
+ * @param l Index in the dictionary the key/value pair is added to.
+ * @param dict Dictionary the keys and values are added to.
+ */
+int dt_meminfo_parse(char *line1, int len1,
+			int l, struct dt_procdict *dict)
+{
+	int i, k, n;
+	if (len1 < 1)
+		return 0;
+
+	if (line1 == 0 || dict == 0)
+		return 0;
+
+	k = l;
+	dict->key[k] = &line1[0];
+	for (i = 0; i < len1 && k < DTOP_DICT_SIZE; i++) {
+		if (line1[i] == ' ' || line1[i] == '	') {
+			line1[i] = 0;
+			n = i+1;
+			while (line1[n] == '	' || line1[n] == ' ')
+				n++;
+			dict->val[k] = &line1[n];
+			while (line1[n] != ' ')
+				n++;
+			line1[n] = 0;
+			break;
+		}
+	}
+	k++;
+	dict->max = k;
+	return k;
+}
+
+/**
+ * @brief Stores the data collected from a "/proc/meminfo"
+ *
+ * @param dpg Struct that polled data is added to.
+ * @return DTOP_POLL_IO_ERR - Poll of dpg unsuccessful.
+ * @return DTOP_POLL_OK - Poll of dpg successful.
+ */
+int dtop_meminfo_poll(struct dtop_data_point_gatherer *dpg)
+{
+	char *data;
+	int *line_len = malloc(sizeof(int) *
+			((struct dtop_meminfo_vars *)
+			(dpg->priv))->line_count);
+	int read;
+	struct dt_procdict dict;
+	int i, j, n, sum;
+
+	read = dt_read_file(dpg->file, &data, DTOP_MEM_SIZE);
+	if (read == 0 || data == 0)
+		return DTOP_POLL_IO_ERR;
+
+	sum = 0;
+	/* Assigns each line read from the file, a length */
+	for (n = 0; n < ((struct dtop_meminfo_vars *)
+				(dpg->priv))->line_count; n++) {
+		line_len[n] = dt_read_line(((struct dtop_meminfo_vars *)
+					(dpg->priv))->line[n],
+					   DTOP_MEM_LINE, data,
+					   DTOP_MEM_SIZE, sum);
+		if (n <= (((struct dtop_meminfo_vars *)
+			(dpg->priv))->line_count - 1)) {
+			sum += (line_len[n] + 1);
+		}
+
+	}
+
+	/* Stores dp names and values in dictionary */
+	for (i = 0; i < dpg->data_points_len; i++)
+		dt_meminfo_parse(((struct dtop_meminfo_vars *)
+			(dpg->priv))->line[i], line_len[i], i, &dict);
+
+	/* Assigns the dp value to the dp struct */
+	for (j = 0; j < dpg->data_points_len; j++) {
+		i = dt_find_dict_idx(dpg->data_points[j].name, &dict);
+		if (i >= 0 && i < dict.max) {
+			sscanf(dict.val[i], "%lu",
+			       &(dpg->data_points[i].data.d_ulong));
+			dpg->data_points[i].data.d_ulong *= 1024;
+			if (dpg->data_points[i].
+				initial_data_populated == NOT_POPULATED) {
+				dpg->data_points[i].initial_data.d_ulong
+					= dpg->data_points[i].data.d_ulong;
+				dpg->data_points[i].initial_data_populated
+					= POPULATED;
+			}
+		}
+	}
+
+	dt_free(&data);
+	free(line_len);
+	return DTOP_POLL_OK;
+}
+
+/**
+ * @brief Frees dynamically allocated "/proc/meminfo" dpg.
+ *
+ * Frees the memory of the dpg along with it's data_points
+ * and other malloc'd memory no longer needed.
+ *
+ * @param dpg Dpg to deconstruct and deallocate memory for.
+ */
+static void dtop_meminfo_dpg_deconstructor
+			(struct dtop_data_point_gatherer *dpset)
+{
+	int i;
+	free(dpset->data_points);
+	for (i = 0; i < ((struct dtop_meminfo_vars *)
+				(dpset->priv))->line_count; i++)
+		free(((struct dtop_meminfo_vars *)(dpset->priv))->line[i]);
+	free(((struct dtop_meminfo_vars *)(dpset->priv))->line);
+	free(((struct dtop_meminfo_vars *)(dpset->priv)));
+	free(dpset);
+}
+
+/**
+ * @brief Creates a dpg for "/proc/meminfo" file
+ *
+ * Dynamically allocates memory for dpg which is then added to a linked list
+ * via the dtop_register(dpg) function call.
+ *
+ * @param data_points dtop_data_point struct that dpg points to.
+ * @param storage dtop_meminfo_vars struct that holds relevant dpg variables.
+ */
+static void construct_meminfo_file_dpg(struct dtop_data_point
+		*data_points, struct dtop_meminfo_vars *storage)
+{
+	struct dtop_data_point_gatherer *dpg = malloc
+		(sizeof(struct dtop_data_point_gatherer));
+	dpg->prefix = "/proc/meminfo";
+	dpg->file = "/proc/meminfo";
+	dpg->poll = dtop_meminfo_poll;
+	dpg->data_points = data_points;
+	dpg->priv = (struct dtop_meminfo_vars *)storage;
+	dpg->data_points_len = storage->line_count;
+	dpg->deconstruct = dtop_meminfo_dpg_deconstructor;
+
+	dtop_register(dpg);
+}
+
+/**
+ * @brief Scans "/proc/meminfo in order to autodetect dps.
+ *
+ * Searches through "/proc/meminfo" file for all available data
+ * points to create as dp structs.
+ *
+ * @param storage dtop_meminfo_vars struct where relevant variables are stored.
+ */
+int dtop_meminfo_search(struct dtop_meminfo_vars *storage)
+{
+	int i, k, n, sum;
+	char *data;
+	int *line_len = malloc(sizeof(int) * storage->line_count);
+	int read;
+	struct dt_procdict dict;
+	struct dtop_data_point *data_points;
+
+	storage->line = malloc(storage->line_count * sizeof(*storage->line));
+
+	for (i = 0; i < storage->line_count; i++)
+		storage->line[i] = malloc(sizeof(char) * DTOP_MEM_LINE);
+
+	read = dt_read_file("/proc/meminfo", &data, DTOP_MEM_SIZE);
+	if (read == 0 || data == 0)
+		return DTOP_POLL_IO_ERR;
+
+	sum = 0;
+	/* Assigns each line read from the file, a length */
+	for (n = 0; n < storage->line_count; n++) {
+		line_len[n] = dt_read_line(storage->line[n],
+					   DTOP_MEM_LINE, data,
+					   DTOP_MEM_SIZE, sum);
+		if (n < (storage->line_count - 1))
+			sum += (line_len[n] + 1);
+	}
+
+	/* Stores dp names in dictionary */
+	for (i = 0; i < (storage->line_count); i++)
+		dt_parse_proc_same_line_key_and_val(storage->line[i],
+						line_len[i], i, &dict);
+
+	data_points = malloc
+		       (storage->line_count * sizeof(struct dtop_data_point));
+
+	k = 0;
+	/* Creates a dtop_data_point struct for each dp found in the file */
+	for (i = 0; i < dict.max; i++) {
+		data_points[i].name = dict.key[i];
+		data_points[i].prefix = NULL;
+		data_points[i].type = DTOP_ULONG;
+		k++;
+	}
+
+	/* Calls dpg constructor, dpg will point to the dp struct */
+	construct_meminfo_file_dpg(data_points, storage);
+
+	free(line_len);
+	dt_free(&data);
+
+	return DTOP_POLL_OK;
+}
+
+/**
+ * @brief Calls dtop_search for "/proc/meminfo" file.
+ */
+void dtop_meminfo_init(void)
+{
+	struct dtop_meminfo_vars *storage = malloc
+			(sizeof(struct dtop_meminfo_vars));
+	storage->line_count = dtop_get_file_line_amount("/proc/meminfo");
+	dtop_meminfo_search(storage);
+}
diff --git a/datatop/src/datatop_opt.c b/datatop/src/datatop_opt.c
new file mode 100644
index 0000000..c2bb366
--- /dev/null
+++ b/datatop/src/datatop_opt.c
@@ -0,0 +1,184 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_opt.c
+ * @brief Adds getopt functionality for CLI commands.
+ *
+ * Contains method for getopt functionality used for parsing
+ * the CLI arguments into executable commands. Handles
+ * errors which arise when parsing.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <getopt.h>
+#include "datatop_opt.h"
+#include "datatop_interface.h"
+#include "datatop_linked_list.h"
+#include "datatop_fileops.h"
+
+/**
+ * @brief Populate the comand line options with sane defaults
+ *
+ * @param clopts Struct used to hold data regarding CLI arguments.
+ */
+void dtop_load_default_options(struct cli_opts *clopts)
+{
+	memset(clopts, 0, sizeof(struct cli_opts));
+
+	clopts->priority = DEFAULT_NICE;
+}
+
+/**
+ * @brief Parses all CLI commands for main() to execute.
+ *
+ * @param clopts Struct used to hold data regarding CLI arguments.
+ * @param argc Parameter used to read CLI commands from.
+ * @param argv Parameter used to read CLI arguments from.
+ * @return PARSE_SUCCESS - CLI arguments read successfully,
+ * @return PARSE_FAILURE - CLI arguments and/or input not valid.
+ * @return PARSE_FORCE_EXIT - Exit immediately, print help options.
+ */
+int dtop_parse_cli_opts(struct cli_opts *clopts, int argc, char **argv)
+{
+	int option;
+
+	if (!clopts || !*argv) {
+		printf("Internal Error: Null Pointer\n");
+		goto error;
+	}
+
+	while ((option = getopt(argc, argv, "phi:t:w:s:n:")) != -1) {
+		switch (option) {
+		case 'p':
+			clopts->print_cl = OPT_CHOSE;
+		break;
+
+		case 'h':
+			dtop_print_help_opts();
+			return PARSE_FORCE_EXIT;
+		break;
+
+		case 'n':
+			clopts->priority = strtol(optarg, 0, 10);
+			if (clopts->priority > 19 || clopts->priority < -20) {
+				printf("Argument for -n is not valid. ");
+				printf("Must be between -20 and 19.\n");
+				goto error;
+			}
+		break;
+
+		case 'i':
+			clopts->poll_per = strtol(optarg, 0, 10);
+			if (clopts->poll_per <= 0) {
+				printf("Argument for -i is not valid. ");
+				printf("Must be positive integer.\n");
+				goto error;
+			}
+		break;
+
+		case 't':
+			clopts->poll_time = strtol(optarg, 0, 10);
+			clopts->poll_time_selected = POLL_TIME_SELECTED;
+			if (clopts->poll_time <= 0) {
+				printf("Argument for -t is not valid. ");
+				printf("Must be positive integer.\n");
+				goto error;
+			}
+		break;
+
+		case 'w':
+			if (dtop_check_writefile_access(optarg) == VALID) {
+				clopts->file_name = optarg;
+				clopts->print_csv = OPT_CHOSE;
+			} else {
+				goto error;
+			}
+		break;
+
+		case 's':
+			if (dtop_check_writefile_access(optarg) == VALID)
+				clopts->snapshot_file = optarg;
+			else
+				goto error;
+		break;
+
+		case '?':
+		default:
+			goto error;
+		}
+	}
+
+	if (clopts->poll_time == 0) {
+		if (clopts->print_csv == 1)
+			clopts->poll_time = POLL_NOT_SPECIFIED;
+		else
+			clopts->poll_time = POLL_TIME_DEFAULT;
+	}
+	if (clopts->poll_per == 0)
+		clopts->poll_per = DEFAULT_POLL_INTERVAL;
+
+	return PARSE_SUCCESS;
+
+error:
+	printf("See datatop -h for help\n");
+	return PARSE_FAILURE;
+}
+
+/**
+ * @brief Prints the options the user has for the program to terminal.
+ */
+void dtop_print_help_opts(void)
+{
+	printf("The following datatop commands are:\n");
+	printf("\t-p\t\t\tPrint output to terminal\n");
+	printf("\t-i , seconds\t\tSpecify polling period\n");
+	printf("\t-t , seconds\t\tSpecify polling duration\n");
+	printf("\t-w , file name (.csv)\tWrite output to a file\n");
+	printf("\t-s , file name\t\tPrint system snapshot to a file\n");
+	printf("\t-n , nice value\t\tSet niceness (default 19)\n");
+	printf("\t-h\t\t\tGet help\n");
+}
+
+
+/**
+* @brief Prints the interactive options the user can enter during runtime.
+*/
+void dtop_print_interactive_opts(void)
+{
+	printf("The following interactive commands are:\n");
+	printf("\tq | quit\tTerminate program at any time\n");
+	printf("\ti\t\tPrint dp differences, reset initial dp values\n");
+	printf("\tl\t\tPrint dp differences since last reset\n");
+	printf("\n");
+}
diff --git a/datatop/src/datatop_opt.h b/datatop/src/datatop_opt.h
new file mode 100644
index 0000000..8f2d855
--- /dev/null
+++ b/datatop/src/datatop_opt.h
@@ -0,0 +1,88 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_opt.h
+ * @brief Declares methods and defines struct used within datatop_opt.c
+ *
+ * Struct defined is used when parsing the CLI arguments.
+ */
+
+#ifndef DATATOP_OPT_H
+#define DATATOP_OPT_H
+
+#define OPT_CHOSE             1
+#define OPT_NOT_CHOSE         0
+#define DEFAULT_POLL_INTERVAL 1
+#define POLL_NOT_SPECIFIED   -1
+#define POLL_TIME_DEFAULT     30
+#define POLL_TIME_SELECTED     1
+#define PARSE_SUCCESS     0
+#define PARSE_FAILURE    -1
+#define PARSE_FORCE_EXIT -2
+#define VALID 0
+#define INVALID -1
+#define DEFAULT_NICE 19               /* Lowest priority */
+
+/**
+ * @struct cli_opts
+ * @brief Struct used to store arguments from CLI input.
+ *
+ * @var cli_opts::print_cl
+ * Represents -p argument.
+ * @var cli_opts::poll_per
+ * Polling frequency argument.
+ * @var cli_opts::poll_time
+ * Polling duration argument.
+ * @var cli_opts::cli_help
+ * Represents -h argument.
+ * @var cli_opts::file_name
+ * File name argument.
+ * @var cli_opts::print_csv
+ * Represents -w argument.
+ */
+struct cli_opts {
+	int print_cl;                   /* -p option */
+	long int poll_per;              /* -i option */
+	long int poll_time;             /* -t option */
+	int cli_help;                   /* -h option */
+	char *file_name;                /* -w option */
+	char *snapshot_file;            /* -s option */
+	int print_csv;
+	int poll_time_selected;
+	int priority;                   /* -n option (niceness) */
+};
+
+int dtop_parse_cli_opts(struct cli_opts *clopts, int argc, char **argv);
+void dtop_print_help_opts(void);
+void dtop_print_interactive_opts(void);
+void dtop_load_default_options(struct cli_opts *clopts);
+
+#endif /* DATATOP_OPT_H */
+
diff --git a/datatop/src/datatop_polling.h b/datatop/src/datatop_polling.h
new file mode 100644
index 0000000..d917474
--- /dev/null
+++ b/datatop/src/datatop_polling.h
@@ -0,0 +1,49 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_dual_line_poll.h
+ * @brief Declares methods held in datatop_dual_line_poll.c
+ */
+
+#ifndef DATATOP_DUAL_LINE_POLL_H
+#define DATATOP_DUAL_LINE_POLL_H
+
+void dtop_dual_line_init(char *name);
+void dtop_single_line_init(char *name);
+void dtop_value_only_init(char *name);
+void dtop_meminfo_init(void);
+void dtop_dev_init(void);
+void dtop_stat_init(void);
+void dtop_cpu_stats_init(void);
+int dtop_value_only_poll(struct dtop_data_point_gatherer *dpg);
+void dtop_value_only_dpg_deconstructor
+			(struct dtop_data_point_gatherer *dpset);
+
+#endif /* DATATOP_DUAL_LINE_POLL_H */
diff --git a/datatop/src/datatop_single_line_poll.c b/datatop/src/datatop_single_line_poll.c
new file mode 100644
index 0000000..a43036f
--- /dev/null
+++ b/datatop/src/datatop_single_line_poll.c
@@ -0,0 +1,243 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_single_line_poll.c
+ * @brief Adds ability for data collection from single line files
+ *
+ * File contains methods for searching and polling data from
+ * single line files, meaning a file with multiple lines, but each
+ * line contains the name of the dp, followed by the value.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "datatop_interface.h"
+#include "datatop_fileops.h"
+#include "datatop_str.h"
+
+#define DTOP_SINGLE_SIZE 8192
+#define DTOP_SINGLE_LINE (DTOP_SINGLE_SIZE>>2)
+
+/**
+* @struct dtop_single_line_vars
+* @brief Struct used to hold necessary variables for dual_line_file dpgs.
+*
+* @var dtop_single_line_vars::line
+* Array of strings where necessary dp names and values are held.
+* @var dtop_single_line_vars::line_count
+* Number of lines the file is that the dpg represents.
+*/
+struct dtop_single_line_vars {
+	char **line;
+	int line_count;
+};
+
+/**
+ * @brief Stores the data collected from a single_line files.
+ *
+ * @param dpg Struct that polled data is added to.
+ * @return DTOP_POLL_IO_ERR - Poll of dpg unsuccessful.
+ * @return DTOP_POLL_OK - Poll of dpg successful.
+ */
+int dtop_single_line_poll(struct dtop_data_point_gatherer *dpg)
+{
+	char *data;
+	int *line_len = malloc(sizeof(int) *
+			((struct dtop_single_line_vars *)
+			(dpg->priv))->line_count);
+	int read;
+	struct dt_procdict dict;
+	int i, j, n, sum;
+
+	read = dt_read_file(dpg->file, &data, DTOP_SINGLE_SIZE);
+	if (read == 0 || data == 0)
+		return DTOP_POLL_IO_ERR;
+
+	sum = 0;
+	/* Assigns each line read from the file, a length */
+	for (n = 0; n < ((struct dtop_single_line_vars *)
+				(dpg->priv))->line_count; n++) {
+		line_len[n] = dt_read_line(((struct dtop_single_line_vars *)
+					(dpg->priv))->line[n],
+					   DTOP_SINGLE_LINE, data,
+					   DTOP_SINGLE_SIZE, sum);
+		if (n <= (((struct dtop_single_line_vars *)
+			(dpg->priv))->line_count - 1)) {
+			sum += (line_len[n] + 1);
+		}
+
+	}
+
+	/* Stores dp names and values in dictionary */
+	for (i = 0; i < dpg->data_points_len; i++)
+		dt_parse_proc_same_line_key_and_val((
+			(struct dtop_single_line_vars *)
+			(dpg->priv))->line[i], line_len[i], i, &dict);
+
+	/* Assigns the dp value to the dp struct */
+	for (j = 0; j < dpg->data_points_len; j++) {
+		i = dt_find_dict_idx(dpg->data_points[j].name, &dict);
+		if (i >= 0 && i < dict.max)
+			dtop_store_dp(&(dpg->data_points[j]),
+				      dict.val[i]);
+	}
+
+	dt_free(&data);
+	free(line_len);
+	return DTOP_POLL_OK;
+}
+
+/**
+ * @brief Frees dynamically allocated single_line_file dpgs.
+ *
+ * Frees the memory of the dpg along with it's data_points
+ * and other malloc'd memory no longer needed.
+ *
+ * @param dpg Dpg to deconstruct and deallocate memory for.
+ */
+static void dtop_single_line_dpg_deconstructor
+			(struct dtop_data_point_gatherer *dpset)
+{
+	int i;
+	free(dpset->data_points);
+	for (i = 0; i < ((struct dtop_single_line_vars *)
+				(dpset->priv))->line_count; i++)
+		free(((struct dtop_single_line_vars *)(dpset->priv))->line[i]);
+	free(((struct dtop_single_line_vars *)(dpset->priv))->line);
+	free(((struct dtop_single_line_vars *)(dpset->priv)));
+	free(dpset);
+}
+
+/**
+ * @brief Creates a dpg for a single_line file.
+ *
+ * Dynamically allocates memory for dpg which is then added to a linked list
+ * via the dtop_register(dpg) function call.
+ *
+ * @param name Name of file dpg represents.
+ * @param data_points dtop_data_point struct that dpg points to.
+ * @param storage dtop_single_line_vars struct that holds relevant dpg variables.
+ */
+static void construct_single_line_file_dpg(char *name, struct dtop_data_point
+		*data_points, struct dtop_single_line_vars *storage)
+{
+	struct dtop_data_point_gatherer *dpg = malloc
+		(sizeof(struct dtop_data_point_gatherer));
+	dpg->prefix = name;
+	dpg->file = name;
+	dpg->poll = dtop_single_line_poll;
+	dpg->data_points = data_points;
+	dpg->priv = (struct dtop_single_line_vars *)storage;
+	dpg->data_points_len = storage->line_count;
+	dpg->deconstruct = dtop_single_line_dpg_deconstructor;
+
+	dtop_register(dpg);
+}
+
+/**
+ * @brief Scans a single_line file for all datapoints and creats dps.
+ *
+ * Searches through a single_line file (Key followed by value on the
+ * same line) for all available data points to create as dp structs.
+ *
+ * @param name Name of file.
+ * @param storage dtop_single_line_vars struct where relevant variables are stored.
+ */
+int dtop_single_line_search(char *name, struct dtop_single_line_vars *storage)
+{
+	int i, k, n, sum;
+	char *data;
+	int *line_len = malloc(sizeof(int) * storage->line_count);
+	int read;
+	struct dt_procdict dict;
+	struct dtop_data_point *data_points;
+
+	storage->line = malloc(storage->line_count * sizeof(*storage->line));
+
+	for (i = 0; i < storage->line_count; i++)
+		storage->line[i] = malloc(sizeof(char) * DTOP_SINGLE_LINE);
+
+	read = dt_read_file(name, &data, DTOP_SINGLE_SIZE);
+	if (read == 0 || data == 0)
+		return DTOP_POLL_IO_ERR;
+
+	sum = 0;
+	/* Assigns each line read from the file, a length */
+	for (n = 0; n < storage->line_count; n++) {
+		line_len[n] = dt_read_line(storage->line[n],
+					   DTOP_SINGLE_LINE, data,
+					   DTOP_SINGLE_SIZE, sum);
+		if (n < (storage->line_count - 1))
+			sum += (line_len[n] + 1);
+	}
+
+	/* Stores dp names and values in dictionary */
+	for (i = 0; i < (storage->line_count); i++)
+		dt_parse_proc_same_line_key_and_val(storage->line[i],
+						line_len[i], i, &dict);
+
+	data_points = malloc
+		       (storage->line_count * sizeof(struct dtop_data_point));
+
+	k = 0;
+	/* Creates a dtop_data_point struct for each dp found in the file */
+	for (i = 0; i < dict.max; i++) {
+		if (dict.val[i][0] == '-')
+			data_points[k].type = DTOP_LONG;
+		else
+			data_points[k].type = DTOP_ULONG;
+		data_points[i].name = dict.key[i];
+		data_points[i].prefix = NULL;
+		k++;
+	}
+
+	/* Calls dpg constructor, dpg will point to the dp struct */
+	construct_single_line_file_dpg(name, data_points, storage);
+
+	free(line_len);
+	dt_free(&data);
+
+	return DTOP_POLL_OK;
+}
+
+/**
+ * @brief Calls dtop_search for a files with single line format.
+ *
+ * Single line format refers to a file, where each line contains
+ * the name of a dp, followed by the value of a dp.
+ */
+void dtop_single_line_init(char *name)
+{
+	struct dtop_single_line_vars *storage = malloc
+			(sizeof(struct dtop_single_line_vars));
+	storage->line_count = dtop_get_file_line_amount(name);
+	dtop_single_line_search(name, storage);
+}
diff --git a/datatop/src/datatop_stat_poll.c b/datatop/src/datatop_stat_poll.c
new file mode 100644
index 0000000..3eadaeb
--- /dev/null
+++ b/datatop/src/datatop_stat_poll.c
@@ -0,0 +1,320 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_stat_poll.c
+ * @brief Adds ability for data collection from /proc/stat
+ *
+ * File contains methods for searching and polling data from
+ * "/proc/stat"
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "datatop_interface.h"
+#include "datatop_fileops.h"
+#include "datatop_str.h"
+
+#define DTOP_STAT_SIZE 16384
+#define DTOP_STAT_LINE (DTOP_STAT_SIZE>>2)
+
+/**
+* @struct dtop_stat_vars
+* @brief Struct used to hold necessary variables for /proc/stat dpg
+*
+* @var dtop_stat_vars::line
+* Array of strings where necessary dp names and values are held.
+* @var dtop_stat_vars::line_count
+* Number of lines the file is that the dpg represents.
+*/
+struct dtop_stat_vars {
+	char **line;
+	int line_count;
+};
+
+/**
+ * @brief Parses lines with data in "/proc/stat"
+ *
+ * @param line1 Line to parse to find datapoint names and values.
+ * @param len1 Length of line1.
+ * @param n_index Index in the dictionary the key (name) is added to.
+ * @param v_index Index in the dictionary the value is added to.
+ * @param dict Dictionary the keys and values are added to.
+ */
+static int dt_stat_parse(char *line1, int len1,
+			int n_index, int v_index, struct dt_procdict *dict)
+{
+	int i, k, j, start = 0;
+	if (len1 < 1)
+		return 0;
+
+	if (line1 == 0 || dict == 0)
+		return 0;
+
+	dict->key[n_index] = &line1[0];
+	for (i = 0; i < len1; i++) {
+		if (line1[i] == ' ') {
+			line1[i] = 0;
+			start = (i+1);
+			break;
+		}
+	}
+
+	k = v_index;
+	for (i = start; i < len1 && k < DTOP_DICT_SIZE; i++) {
+		if (line1[i] != ' ') {
+			dict->val[k] = &line1[i];
+			for (j = i; j < len1; j++) {
+				if (line1[j] == ' ') {
+					line1[j] = 0;
+					break;
+				}
+			}
+			i = j;
+			k++;
+		}
+	}
+
+	dict->max = k;
+	return k;
+}
+
+/**
+ * @brief Stores the data collected from "/proc/stat"
+ *
+ * @param dpg Struct that polled data is added to.
+ * @return DTOP_POLL_IO_ERR - Poll of dpg unsuccessful.
+ * @return DTOP_POLL_OK - Poll of dpg successful.
+ */
+int dtop_stat_poll(struct dtop_data_point_gatherer *dpg)
+{
+	char *data;
+	int *line_len = malloc(sizeof(int) *
+			((struct dtop_stat_vars *)
+			(dpg->priv))->line_count);
+	int read;
+	struct dt_procdict dict;
+	int i, n, sum;
+	int dp_count = 0;
+
+	read = dt_read_file(dpg->file, &data, DTOP_STAT_SIZE);
+	if (read == 0 || data == 0)
+		return DTOP_POLL_IO_ERR;
+
+	sum = 0;
+	/* Assigns each line read from the file, a length */
+	for (n = 0; n < ((struct dtop_stat_vars *)
+				(dpg->priv))->line_count; n++) {
+		line_len[n] = dt_read_line(((struct dtop_stat_vars *)
+					(dpg->priv))->line[n],
+					   DTOP_STAT_LINE, data,
+					   DTOP_STAT_SIZE, sum);
+		if (n <= (((struct dtop_stat_vars *)
+			(dpg->priv))->line_count - 1)) {
+			sum += (line_len[n] + 1);
+		}
+
+	}
+
+	/* Stores dp names and values in dictionary */
+	for (i = 0; i < ((struct dtop_stat_vars *)(dpg->priv))->line_count; i++)
+		dp_count = dt_stat_parse(((struct dtop_stat_vars *)
+			(dpg->priv))->line[i], line_len[i], i, dp_count, &dict);
+
+	/* Assigns the dp value to the dp struct */
+	for (n = 0; n < dp_count; n++) {
+		dtop_store_dp(&(dpg->data_points[n]),
+				dict.val[n]);
+	}
+
+	dt_free(&data);
+	free(line_len);
+	return DTOP_POLL_OK;
+}
+
+/**
+ * @brief Frees dynamically allocated "/proc/stat" dpg.
+ *
+ * Frees the memory of the dpg along with it's data_points
+ * and other malloc'd memory no longer needed.
+ *
+ * @param dpg Dpg to deconstruct and deallocate memory for.
+ */
+static void dtop_stat_dpg_deconstructor
+			(struct dtop_data_point_gatherer *dpset)
+{
+	int i;
+	for (i = 0; i < dpset->data_points_len; i++)
+		free(dpset->data_points[i].name);
+	free(dpset->data_points);
+	for (i = 0; i < ((struct dtop_stat_vars *)
+				(dpset->priv))->line_count; i++)
+		free(((struct dtop_stat_vars *)(dpset->priv))->line[i]);
+	free(((struct dtop_stat_vars *)(dpset->priv))->line);
+	free(((struct dtop_stat_vars *)(dpset->priv)));
+
+	free(dpset);
+}
+
+/**
+ * @brief Creates a dpg for "/proc/stat" file
+ *
+ * Dynamically allocates memory for dpg which is then added to a linked list
+ * via the dtop_register(dpg) function call.
+ *
+ * @param data_points dtop_data_point struct that dpg points to.
+ * @param storage dtop_stat_vars struct that holds relevant dpg variables.
+ * @param dp_count Number of data_points in data_points array
+ */
+static void construct_stat_file_dpg(struct dtop_data_point
+		*data_points, struct dtop_stat_vars *storage, int dp_count)
+{
+	struct dtop_data_point_gatherer *dpg = malloc
+		(sizeof(struct dtop_data_point_gatherer));
+	dpg->prefix = "/proc/stat";
+	dpg->file = "/proc/stat";
+	dpg->poll = dtop_stat_poll;
+	dpg->data_points = data_points;
+	dpg->priv = (struct dtop_stat_vars *)storage;
+	dpg->data_points_len = dp_count;
+	dpg->deconstruct = dtop_stat_dpg_deconstructor;
+
+	dtop_register(dpg);
+}
+
+/**
+ * @brief Scans "/proc/stat" in order to autodetect dps.
+ *
+ * Searches through "/proc/stat" file for all available data
+ * points to create as dp structs.
+ *
+ * @param storage dtop_stat_vars struct where relevant variables are stored.
+ */
+int dtop_stat_search(struct dtop_stat_vars *storage)
+{
+	int i, k, n, sum;
+	char *data;
+	int *line_len = malloc(sizeof(int) * storage->line_count);
+	int read;
+	struct dt_procdict dict;
+	int dp_count = 0;
+	int end;
+	int *dp_per_line;
+	struct dtop_data_point *data_points;
+	int count = 0;
+
+	storage->line = malloc(storage->line_count * sizeof(*storage->line));
+
+	for (i = 0; i < storage->line_count; i++)
+		storage->line[i] = malloc(sizeof(char) * DTOP_STAT_LINE);
+
+	read = dt_read_file("/proc/stat", &data, DTOP_STAT_SIZE);
+	if (read == 0 || data == 0)
+		return DTOP_POLL_IO_ERR;
+
+	sum = 0;
+	/* Assigns each line read from the file, a length */
+	for (n = 0; n < storage->line_count; n++) {
+		line_len[n] = dt_read_line(storage->line[n],
+					   DTOP_STAT_LINE, data,
+					   DTOP_STAT_SIZE, sum);
+		if (n < (storage->line_count - 1))
+			sum += (line_len[n] + 1);
+	}
+
+	dp_per_line = malloc(sizeof(int) * (storage->line_count));
+	/* Stores dp names in dictionary */
+
+	for (i = 0; i < (storage->line_count); i++) {
+		end = dp_count;
+		dp_count = dt_stat_parse(storage->line[i],
+				line_len[i], i, dp_count, &dict);
+		dp_per_line[i] = (dp_count - end);
+	}
+
+	data_points = malloc(dp_count * sizeof(struct dtop_data_point));
+
+	for (i = 0; i < (storage->line_count); i++) {
+		for (n = 0; n < dp_per_line[i]; n++) {
+			if (dp_per_line[i] == 1) {
+				int dk_len = strlen(dict.key[i]) + 1;
+				int dp_len;
+				char *newname = malloc(dk_len);
+				strlcpy(newname, dict.key[i], dk_len);
+				dp_len = strlen(newname) + 1;
+				data_points[count].name = malloc(dp_len);
+				strlcpy(data_points[count].name, newname,
+					dp_len);
+				free(newname);
+			} else {
+				char *add = malloc(15 * sizeof(char));
+				char *newname;
+				int nn_len, dpn_len;
+				snprintf(add, 15 * sizeof(char), "[%d]:", n);
+				nn_len = strlen(dict.key[i]) + strlen(add) + 1;
+				newname = malloc(nn_len);
+				strlcpy(newname, dict.key[i], nn_len);
+				strlcat(newname, add, nn_len);
+				dpn_len = strlen(newname) + 1;
+				data_points[count].name = malloc(dpn_len);
+				strlcpy(data_points[count].name, newname,
+					dpn_len);
+				free(newname);
+				free(add);
+			}
+			data_points[count].prefix = NULL;
+			data_points[count].type = DTOP_ULONG;
+			data_points[count].initial_data_populated
+						= NOT_POPULATED;
+			data_points[count].skip = DO_NOT_SKIP;
+			count++;
+		}
+	}
+	k = 0;
+
+	/* Calls dpg constructor, dpg will point to the dp struct */
+	construct_stat_file_dpg(data_points, storage, dp_count);
+	free(dp_per_line);
+	free(line_len);
+	dt_free(&data);
+
+	return DTOP_POLL_OK;
+}
+
+/**
+ * @brief Calls dtop_search for "/proc/stat" file.
+ */
+void dtop_stat_init(void)
+{
+	struct dtop_stat_vars *storage = malloc
+			(sizeof(struct dtop_stat_vars));
+	storage->line_count = dtop_get_file_line_amount("/proc/stat");
+	dtop_stat_search(storage);
+}
diff --git a/datatop/src/datatop_str.c b/datatop/src/datatop_str.c
new file mode 100644
index 0000000..3d25751
--- /dev/null
+++ b/datatop/src/datatop_str.c
@@ -0,0 +1,260 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_str.c
+ * @brief Algorithms used for storing and polling data created.
+ *
+ * Methods created which store collected data from files in
+ * dictionaries for many different file formats.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include "datatop_str.h"
+
+/** @brief Reads an individual line from a file.
+ *
+ * Will read from buf2 until either a '\n' is reached, or the end of buf1
+ * or buf2 is reached. The result is guaranteed to be null terminated.
+ *
+ * @param buf1 Destination buffer to store the read line.
+ * @param len1 Size of destination buffer.
+ * @param buf2 Source buffer to read lines from. Const, will not be
+ *             modified by this function.
+ * @param len2 Size of the source buffer.
+ * @param start Offset (in bytes) to start reading from source buffer.
+ * @return Length of line (of chars).
+ */
+int dt_read_line(char *buf1, int len1, const char *buf2, int len2, int start)
+{
+	int i, j;
+
+	if (len1 < 1 || len2 < 1 || start < 0 || start > len2)
+		return 0;
+
+	if (buf1 == 0 || buf2 == 0)
+		return 0;
+
+	i = 0;
+	j = start;
+
+	while ((i < (len1-1)) && (j < len2)) {
+		buf1[i] = buf2[j];
+		if (buf1[i] == '\n')
+			break;
+		i++;
+		j++;
+	}
+	buf1[i] = 0;
+	return i;
+}
+
+/**
+ * @brief Parses files that have Names and Values on separate lines.
+ *
+ * Use this method to parse files that have names on one line, followed by
+ * the corresponding values on the next line. Such as "/proc/net/netstat"
+ *
+ * @param line1 First line that is parsed to store the datapoint names as keys.
+ * @param len1 Length of line1.
+ * @param line2 Second line that is parsed to store the datapoint values as dictionary values.
+ * @param len2 Length of line2.
+ * @param dict Dictionary that keys and values are added to.
+ * @return Number of key/val pairs in the dictionary.
+ */
+int dt_parse_proc_dictionary(char *line1, int len1, char *line2,
+			     int len2, struct dt_procdict *dict)
+{
+	int i, j, k;
+
+	if (len1 < 1 || len2 < 1)
+		return 0;
+
+	if (line1 == 0 || line2 == 0 || dict == 0)
+		return 0;
+
+	k = 0;
+	for (i = 0; i < len1 && k < DTOP_DICT_SIZE; i++) {
+		if (line1[i] == ' ') {
+			dict->key[k] = &line1[i+1];
+			line1[i] = 0;
+			k++;
+		}
+	}
+	j = k;
+
+	k = 0;
+	for (i = 0; i < len2 && k < DTOP_DICT_SIZE; i++) {
+		if (line2[i] == ' ') {
+			dict->val[k] = &line2[i+1];
+			line2[i] = 0;
+			k++;
+		}
+	}
+	if (j != k) {
+		if (k < j)
+			j = k;
+		fprintf(stderr, "Warning, list index length mismatch\n");
+	}
+	dict->max = j;
+	return j;
+}
+
+/**
+ * @brief Parses line for prefixes for files that have individual data_point prefixes.
+ *
+ * Use this method for lines that have a prefix before data begins. Such as
+ * "/proc/net/snmp"
+ *
+ * @param line1 Line to parse to find datapoint prefix.
+ * @param len1 Length of line1.
+ * @param dict Dictionary prefix is being added to.
+ */
+void dt_parse_for_prefix(char *line1, int len1, struct dt_procdict *dict)
+{
+	int i, j, k;
+
+	if (len1 < 1)
+		return;
+
+	if (line1 == 0 || dict == 0)
+		return;
+
+	k = 0;
+	for (i = 0; i < len1 && k < DTOP_DICT_SIZE; i++) {
+		if (line1[i] == ' ') {
+			dict->key[k] = &line1[i+1];
+			line1[i] = 0;
+			k++;
+		}
+	}
+
+	for (j = 0; j < k; j++)
+		dict->val[j] = &line1[0];
+
+	for (j = 0; j < len1; j++) {
+		if (line1[j] == ':')
+			line1[j] = 0;
+	}
+}
+
+/**
+ * @brief Finds the dictionary index of a data_point name.
+ *
+ * @param str Name of data_point that is to be located in dict.
+ * @param dict Dictionary to look through for dp name.
+ * @return Dictionary index of name if found.
+ * @return -1 if name not found in dictionary keys.
+ */
+int dt_find_dict_idx(const char *str, struct dt_procdict *dict)
+{
+	int i;
+	if (str == 0 || dict == 0)
+		return -1;
+
+	for (i = 0; i < dict->max; i++) {
+		if (dict->key[i] && !strcmp(str, dict->key[i]))
+			return i;
+	}
+	return -1;
+}
+
+/**
+ * @brief Parses files that have Names and Values on same line.
+ *
+ * Use this method to parse lines that have a dp name followed
+ * by a dp value. Such as "/proc/net/snmp6"
+ *
+ * @param line1 Line to parse to find datapoint names and values.
+ * @param len1 Length of line1.
+ * @param l Index in the dictionary the key/val pair is added to.
+ * @param dict Dictionary the keys and values are added to.
+ * @return Number of key/val pairs in the dictionary.
+ */
+int dt_parse_proc_same_line_key_and_val(char *line1, int len1,
+					int l, struct dt_procdict *dict)
+{
+	int i, k, n;
+	if (len1 < 1)
+		return 0;
+
+	if (line1 == 0 || dict == 0)
+		return 0;
+
+	k = l;
+	for (i = 0; i < len1 && k < DTOP_DICT_SIZE; i++) {
+		if (line1[i] == ' ') {
+			dict->key[k] = &line1[0];
+			line1[i] = 0;
+			for (n = i+1; n < len1; n++) {
+				if (line1[n] != ' ') {
+					dict->val[k] = &line1[n+1];
+					break;
+				}
+			}
+			break;
+		}
+	}
+	k++;
+	dict->max = k;
+	return k;
+}
+
+/**
+ * @brief Parses files that have a single line.
+ *
+ * Parses a single line file for csv, tab-separated, space-separated, and single
+ * value formats and adds values to a dictionary. Such as
+ * "/proc/sys/net/ipv4/ping_group_range"
+ *
+ * Use this method to parse lines that contain only values.
+ *
+ * @param line1 Line to parse.
+ * @param len1 Length of line1.
+ * @param dict Dictionary datapoints are added to.
+ * @return Number of values dictionary holds.
+ */
+int dt_single_line_parse(char *line1, int len1, struct dt_procdict *dict)
+{
+	int i, k;
+	k = 0;
+	dict->val[k] = &line1[0];
+	k++;
+
+	for (i = 0; i < len1; i++) {
+		if (line1[i] == ' ' || line1[i] == ',' || line1[i] == '	') {
+			line1[i] = 0;
+			dict->val[k] = &line1[i+1];
+			k++;
+		}
+	}
+	dict->max = k;
+	return k;
+}
diff --git a/datatop/src/datatop_str.h b/datatop/src/datatop_str.h
new file mode 100644
index 0000000..1f30370
--- /dev/null
+++ b/datatop/src/datatop_str.h
@@ -0,0 +1,70 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_str.h
+ * @brief Declares methods held in datatop_str.c and defines dictionary struct.
+ */
+
+#ifndef DATATOP_STR_H
+#define DATATOP_STR_H
+
+#define DTOP_DICT_SIZE 2048
+
+/**
+ * @struct dt_procdict
+ * @brief Struct used to create dictionary for parsing purposes.
+ *
+ * @var dt_procdict::max
+ * Number of key/val pairs in dictionary.
+ * @var dt_procdict::key
+ * Holds the key that is used to access the value.
+ * @var dt_procdict::val
+ * Value that the key accesses.
+ */
+struct dt_procdict {
+	int max;
+	char *key[DTOP_DICT_SIZE];
+	char *val[DTOP_DICT_SIZE];
+};
+
+int dt_read_line(char *buf1, int len1, const char *buf2, int len2, int start);
+
+int dt_parse_proc_dictionary(char *line1, int len1, char *line2, int len2,
+			     struct dt_procdict *dict);
+
+int dt_find_dict_idx(const char *str, struct dt_procdict *dict);
+
+int dt_parse_proc_same_line_key_and_val(char *line1, int len1, int l,
+					struct dt_procdict *dict);
+
+void dt_parse_for_prefix(char *line1, int len1, struct dt_procdict *dict);
+
+int dt_single_line_parse(char *line1, int len1, struct dt_procdict *dict);
+#endif /* DATATOP_STR_H */
diff --git a/datatop/src/datatop_sys_snap.c b/datatop/src/datatop_sys_snap.c
new file mode 100644
index 0000000..ee9ea95
--- /dev/null
+++ b/datatop/src/datatop_sys_snap.c
@@ -0,0 +1,199 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+#include <unistd.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+
+#include "datatop_interface.h"
+#include "datatop_fileops.h"
+#include "datatop_str.h"
+#include "datatop_opt.h"
+
+#define DTOP_SNAP_SIZE 8192
+#define DTOP_SNAP_LINE (DTOP_SNAP_SIZE>>2)
+
+static int dtop_system_snapshot_helper_print(char *file, const char *str)
+{
+	FILE *snap_file = fopen(file, "a");
+
+	if (snap_file) {
+		if (fprintf(snap_file, "%s", str) < 0) {
+			fclose(snap_file);
+			return FILE_ERROR;
+		}
+	} else {
+			return FILE_ERROR;
+	}
+	fflush(snap_file);
+	fclose(snap_file);
+	return FILE_SUCCESS;
+}
+
+/**
+ * @brief A helper function to dtop_print_system_snapshot.
+ *
+ * @param fw File that desired system data is printed to.
+ * @return FILE_ERROR - Writing to file was unsuccessful.
+ * @return FILE_SUCCESS - Writing to file was successful.
+ */
+static int dtop_run_and_log(char *file, const char *c1, const char **args)
+{
+	int i;
+	pid_t child_pid;
+
+	i = 0;
+	dtop_system_snapshot_helper_print(file, "\n"
+	"--------------------------------------------------------------\n"
+	"Command: ");
+	while(args[i] != 0) {
+		dtop_system_snapshot_helper_print(file, args[i++]);
+		dtop_system_snapshot_helper_print(file, " ");
+	}
+	dtop_system_snapshot_helper_print(file, "\n");
+
+
+	child_pid = fork();
+	if (child_pid == 0) {
+		int fd = open(file, O_WRONLY | O_APPEND | O_CREAT,
+						S_IRUSR | S_IWUSR);
+		dup2(fd, STDOUT_FILENO);
+		dup2(fd, STDERR_FILENO);
+		close(fd);
+		execvp(c1, (char * const *)args);
+		printf("Failed to execute %s\n", c1);
+		printf("errno=%d error=%s\n", errno, strerror(errno));
+		close(STDOUT_FILENO);
+		close(STDERR_FILENO);
+		exit(0);
+	} else if (child_pid < 0) {
+		return FILE_ERROR;
+	} else {
+		int return_status;
+		waitpid(child_pid, &return_status, 0);
+
+		if (return_status != 0)
+			return FILE_ERROR;
+	}
+
+	return FILE_SUCCESS;
+}
+
+
+
+/* IPv4 */
+const char *ip_addr_cmd[] = {"ip", "addr", 0};
+const char *ip_route_cmd[] = {"ip", "route", 0};
+const char *ip_route_all_tables_cmd[] = {"ip", "route", "show", "table", "all", 0};
+const char *ip_rule_cmd[] = {"ip", "rule", "show", 0};
+const char *ip_tables_cmd[] = {"iptables", "-L", "-n", "-v", 0};
+const char *ip_tables_nat_cmd[] = {"iptables", "-t", "nat", "-L", "-n", "-v", 0};
+const char *ip_tables_mangle_cmd[] = {"iptables", "-t", "mangle", "-L", "-n", "-v", 0};
+const char *ip_tables_raw_cmd[] = {"iptables", "-t", "raw", "-L", "-n", "-v", 0};
+
+/* IPv6 */
+const char *ip6_addr_cmd[] = {"ip", "-6", "addr", 0};
+const char *ip6_route_cmd[] = {"ip", "-6", "route", 0};
+const char *ip6_route_all_tables_cmd[] = {"ip", "-6", "route", "show", "table", "all", 0};
+const char *ip6_rule_cmd[] = {"ip", "-6", "rule", "show", 0};
+const char *ip6_tables_cmd[] = {"ip6tables", "-L", "-n", "-v", 0};
+const char *ip6_tables_nat_cmd[] = {"ip6tables", "-t", "nat", "-L", "-n", "-v", 0};
+const char *ip6_tables_mangle_cmd[] = {"ip6tables", "-t", "mangle", "-L", "-n", "-v", 0};
+const char *ip6_tables_raw_cmd[] = {"ip6tables", "-t", "raw", "-L", "-n", "-v", 0};
+
+/* Misc */
+const char *rps_config[] = {"cat", "/sys/class/net/rmnet_mhi0/queues/rx-0/rps_cpus", 0};
+const char *if_config[] = {"/data/busybox/busybox", "ifconfig", 0};
+const char *netcfg[] = {"netcfg", 0};
+const char *softnet_stat[] = {"cat", "/proc/net/softnet_stat", 0};
+
+/* XFRM logging */
+const char *xfrm_state[] = {"ip", "xfrm", "state", "show", 0};
+const char *xfrm_policy[] = {"ip", "xfrm", "policy", "show", 0};
+const char *xfrm_netstat[] = {"cat", "/proc/net/xfrm_stat", 0};
+
+#define DO_DTOP_RUN_AND_LOG(X) \
+	dtop_run_and_log(file, X[0], X);
+/**
+ * @brief Prints a System snapshot to a file specified by the user.
+ *
+ * @param fw File that system snapshot is printed to.
+ * @return FILE_ERROR - Writing to file was unsuccessful.
+ * @return FILE_SUCCESS - Writing to file was successful.
+ */
+int dtop_print_system_snapshot(char *file)
+{
+	dtop_system_snapshot_helper_print(file,
+	"==============================================================\n"
+	"    System Data Snapshot - Captured with Data Top             \n"
+	"    Version ");
+	dtop_system_snapshot_helper_print(file, VERSION);
+	dtop_system_snapshot_helper_print(file, "\n"
+	"==============================================================\n"
+	"\n");
+
+	/* IPv4 */
+	DO_DTOP_RUN_AND_LOG(ip_addr_cmd);
+	DO_DTOP_RUN_AND_LOG(ip_route_cmd);
+	DO_DTOP_RUN_AND_LOG(ip_route_all_tables_cmd);
+	DO_DTOP_RUN_AND_LOG(ip_rule_cmd);
+	DO_DTOP_RUN_AND_LOG(ip_tables_cmd);
+	DO_DTOP_RUN_AND_LOG(ip_tables_nat_cmd);
+	DO_DTOP_RUN_AND_LOG(ip_tables_mangle_cmd);
+	DO_DTOP_RUN_AND_LOG(ip_tables_raw_cmd);
+
+	/* IPv6 */
+	DO_DTOP_RUN_AND_LOG(ip6_addr_cmd);
+	DO_DTOP_RUN_AND_LOG(ip6_route_cmd);
+	DO_DTOP_RUN_AND_LOG(ip6_route_all_tables_cmd);
+	DO_DTOP_RUN_AND_LOG(ip6_rule_cmd);
+	DO_DTOP_RUN_AND_LOG(ip6_tables_cmd);
+	DO_DTOP_RUN_AND_LOG(ip6_tables_nat_cmd);
+	DO_DTOP_RUN_AND_LOG(ip6_tables_mangle_cmd);
+	DO_DTOP_RUN_AND_LOG(ip6_tables_raw_cmd);
+
+	/* Misc */
+	DO_DTOP_RUN_AND_LOG(rps_config);
+	DO_DTOP_RUN_AND_LOG(if_config);
+	DO_DTOP_RUN_AND_LOG(netcfg);
+	DO_DTOP_RUN_AND_LOG(softnet_stat);
+
+	/* XFRM logging */
+	DO_DTOP_RUN_AND_LOG(xfrm_state);
+	DO_DTOP_RUN_AND_LOG(xfrm_policy);
+	DO_DTOP_RUN_AND_LOG(xfrm_netstat);
+
+	return FILE_SUCCESS;
+}
diff --git a/datatop/src/datatop_value_only_poll.c b/datatop/src/datatop_value_only_poll.c
new file mode 100644
index 0000000..bf6fc54
--- /dev/null
+++ b/datatop/src/datatop_value_only_poll.c
@@ -0,0 +1,201 @@
+/************************************************************************
+Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+************************************************************************/
+
+/**
+ * @file datatop_value_only_poll.c
+ * @brief Adds ability for data collection from files with only values
+ *
+ * File contains methods for searching and polling data from
+ * value_only files, meaning a file with a single line, containing
+ * only values.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "datatop_interface.h"
+#include "datatop_fileops.h"
+#include "datatop_str.h"
+
+#define DTOP_SINGLE_SIZE 8192
+#define DTOP_SINGLE_LINE (DTOP_SINGLE_SIZE>>2)
+
+/**
+ * @brief Stores the data collected from a value_only files.
+ *
+ * @param dpg Struct that polled data is added to.
+ * @return DTOP_POLL_IO_ERR - Poll of dpg unsuccessful.
+ * @return DTOP_POLL_OK - Poll of dpg successful.
+ */
+int dtop_value_only_poll(struct dtop_data_point_gatherer *dpg)
+{
+	char *data;
+	int line_len;
+	char line[DTOP_SINGLE_LINE];
+	int read;
+	struct dt_procdict dict;
+	int j;
+	FILE *check = fopen(dpg->file, "r");
+	if (check) {
+		fclose(check);
+		read = dt_read_file(dpg->file, &data, DTOP_SINGLE_SIZE);
+	} else {
+		return DTOP_POLL_IO_ERR;
+	}
+
+	if (read == 0 || data == 0)
+		return DTOP_POLL_IO_ERR;
+
+	line_len = dt_read_line(line, DTOP_SINGLE_LINE, data,
+					   DTOP_SINGLE_SIZE, 0);
+
+	/* Stores dp values in dictionary */
+	dt_single_line_parse(line, line_len, &dict);
+
+	/* Assigns the dp value to the dp struct */
+	for (j = 0; j < dpg->data_points_len; j++)
+		dtop_store_dp(&(dpg->data_points[j]), dict.val[j]);
+
+	dt_free(&data);
+	return DTOP_POLL_OK;
+}
+
+/**
+ * @brief Frees dynamically allocated single line dpg.
+ *
+ * Frees the memory of the dpg along with it's data_points
+ * and other malloc'd memory no longer needed.
+ *
+ * @param dpg Dpg to deconstruct and deallocate memory for.
+ */
+void dtop_value_only_dpg_deconstructor
+			(struct dtop_data_point_gatherer *dpset)
+{
+	int i;
+	for (i = 0; i < dpset->data_points_len; i++)
+		free(dpset->data_points[i].name);
+	free(dpset->data_points);
+	free(dpset->file);
+	free(dpset);
+}
+
+/**
+ * @brief Creates a dpg for a single line file.
+ *
+ * Dynamically allocates memory for dpg which is then added to a linked list
+ * via the dtop_register(dpg) function call.
+ *
+ * @param name Name of file dpg represents.
+ * @param data_points dtop_data_point struct that dpg points to.
+ * @param dp_count Number of data_points in data_points array
+ */
+static void construct_value_only_dpg(char *name, struct dtop_data_point
+		*data_points, int dp_count)
+{
+	struct dtop_data_point_gatherer *dpg = malloc
+		(sizeof(struct dtop_data_point_gatherer));
+	dpg->prefix = name;
+	dpg->file = name;
+	dpg->poll = dtop_value_only_poll;
+	dpg->data_points = data_points;
+	dpg->data_points_len = dp_count;
+	dpg->deconstruct = dtop_value_only_dpg_deconstructor;
+
+	dtop_register(dpg);
+}
+
+/**
+ * @brief Scans a single line file in order to autodetect dps.
+ *
+ * Searches through a file that contains a single line and only
+ * values in order to detect and create dp's/
+ *
+ * @param name Name of file to scan.
+ */
+int dtop_value_only_search(char *name)
+{
+	int i;
+	char *data;
+	char line[DTOP_SINGLE_LINE];
+	int line_len;
+	int read;
+	struct dt_procdict dict;
+	struct dtop_data_point *data_points;
+
+
+	read = dt_read_file(name, &data, DTOP_SINGLE_SIZE);
+	if (read == 0 || data == 0) {
+		free(name);
+		return DTOP_POLL_IO_ERR;
+	}
+
+	line_len = dt_read_line(line,
+				DTOP_SINGLE_LINE, data,
+				DTOP_SINGLE_SIZE, 0);
+
+	/* Stores dp values in dictionary */
+	dt_single_line_parse(line, line_len, &dict);
+
+	data_points = malloc(dict.max * sizeof(struct dtop_data_point));
+
+	/* Creates a dtop_data_point struct for each dp found in the file */
+	for (i = 0; i < dict.max; i++) {
+		char *newname = malloc(sizeof(10));
+		if (dict.val[i][0] == '-')
+			data_points[i].type = DTOP_LONG;
+		else
+			data_points[i].type = DTOP_ULONG;
+		data_points[i].name = malloc(sizeof(10));
+		if (dict.max > 1)
+			snprintf(newname, sizeof(10), "[%d]:", i);
+		else
+			strlcpy(newname, "", sizeof(10));
+		strlcpy(data_points[i].name, newname, sizeof(10));
+		free(newname);
+		data_points[i].prefix = NULL;
+		data_points[i].skip = DO_NOT_SKIP;
+		data_points[i].initial_data_populated = NOT_POPULATED;
+	}
+
+	/* Calls dpg constructor, dpg will point to the dp struct */
+	construct_value_only_dpg(name, data_points, dict.max);
+
+	dt_free(&data);
+	return DTOP_POLL_OK;
+}
+
+/**
+ * @brief Calls dtop_search for files with a single line and only values.
+ */
+void dtop_value_only_init(char *name)
+{
+	char *file = malloc(strlen(name) + 1);
+	strlcpy(file, name, strlen(name) + 1);
+	dtop_value_only_search(file);
+}