Initial Contribution

1 files changed, 891 insertions, 0 deletions

diff --git a/init/init.c b/init/init.c
new file mode 100644
index 00000000..f6e9b398
--- /dev/null
+++ b/init/init.c
@@ -0,0 +1,891 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <signal.h>
+#include <sys/wait.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <sys/poll.h>
+#include <time.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <mtd/mtd-user.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/reboot.h>
+
+#include <cutils/sockets.h>
+#include <termios.h>
+#include <linux/kd.h>
+
+#include <sys/system_properties.h>
+
+#include "devices.h"
+#include "init.h"
+#include "property_service.h"
+
+#ifndef BOOTCHART
+# define  BOOTCHART  0
+#endif
+
+static int property_triggers_enabled = 0;
+
+#if BOOTCHART
+static int   bootchart_count;
+extern int   bootchart_init(void);
+extern int   bootchart_step(void);
+extern void  bootchart_finish(void);
+# define BOOTCHART_POLLING_MS   200 /* polling period in ms */
+# define BOOTCHART_MAX_TIME_MS  (2*60*1000) /* max polling time from boot */
+# define BOOTCHART_MAX_COUNT    (BOOTCHART_MAX_TIME_MS/BOOTCHART_POLLING_MS)
+#endif
+
+static char console[32];
+static char serialno[32];
+static char bootmode[32];
+static char baseband[32];
+static char carrier[32];
+static char bootloader[32];
+static char hardware[32];
+static unsigned revision = 0;
+static char qemu[32];
+
+static void drain_action_queue(void);
+
+static void notify_service_state(const char *name, const char *state)
+{
+    char pname[PROP_NAME_MAX];
+    int len = strlen(name);
+    if ((len + 10) > PROP_NAME_MAX)
+        return;
+    snprintf(pname, sizeof(pname), "init.svc.%s", name);
+    property_set(pname, state);
+}
+
+static int have_console;
+static char *console_name = "/dev/console";
+static time_t process_needs_restart;
+
+static const char *ENV[32];
+
+/* add_environment - add "key=value" to the current environment */
+int add_environment(const char *key, const char *val)
+{
+    int n;
+ 
+    for (n = 0; n < 31; n++) {
+        if (!ENV[n]) {
+            size_t len = strlen(key) + strlen(val) + 2;
+            char *entry = malloc(len);
+            snprintf(entry, len, "%s=%s", key, val);
+            ENV[n] = entry;
+            return 0;
+        }
+    }
+
+    return 1;
+}
+
+static void zap_stdio(void)
+{
+    int fd;
+    fd = open("/dev/null", O_RDWR);
+    dup2(fd, 0);
+    dup2(fd, 1);
+    dup2(fd, 2);
+    close(fd);
+}
+
+static void open_console()
+{
+    int fd;
+    if ((fd = open(console_name, O_RDWR)) < 0) {
+        fd = open("/dev/null", O_RDWR);
+    }
+    dup2(fd, 0);
+    dup2(fd, 1);
+    dup2(fd, 2);
+    close(fd);
+}
+
+/*
+ * gettime() - returns the time in seconds of the system's monotonic clock or
+ * zero on error.
+ */
+static time_t gettime(void)
+{
+    struct timespec ts;
+    int ret;
+
+    ret = clock_gettime(CLOCK_MONOTONIC, &ts);
+    if (ret < 0) {
+        ERROR("clock_gettime(CLOCK_MONOTONIC) failed: %s\n", strerror(errno));
+        return 0;
+    }
+
+    return ts.tv_sec;
+}
+
+static void publish_socket(const char *name, int fd)
+{
+    char key[64] = ANDROID_SOCKET_ENV_PREFIX;
+    char val[64];
+
+    strlcpy(key + sizeof(ANDROID_SOCKET_ENV_PREFIX) - 1,
+            name,
+            sizeof(key) - sizeof(ANDROID_SOCKET_ENV_PREFIX));
+    snprintf(val, sizeof(val), "%d", fd);
+    add_environment(key, val);
+
+    /* make sure we don't close-on-exec */
+    fcntl(fd, F_SETFD, 0);
+}
+
+void service_start(struct service *svc)
+{
+    struct stat s;
+    pid_t pid;
+    int needs_console;
+    int n;
+
+        /* starting a service removes it from the disabled
+         * state and immediately takes it out of the restarting
+         * state if it was in there
+         */
+    svc->flags &= (~(SVC_DISABLED|SVC_RESTARTING));
+    svc->time_started = 0;
+    
+        /* running processes require no additional work -- if
+         * they're in the process of exiting, we've ensured
+         * that they will immediately restart on exit, unless
+         * they are ONESHOT
+         */
+    if (svc->flags & SVC_RUNNING) {
+        return;
+    }
+
+    needs_console = (svc->flags & SVC_CONSOLE) ? 1 : 0;
+    if (needs_console && (!have_console)) {
+        ERROR("service '%s' requires console\n", svc->name);
+        svc->flags |= SVC_DISABLED;
+        return;
+    }
+
+    if (stat(svc->args[0], &s) != 0) {
+        ERROR("cannot find '%s', disabling '%s'\n", svc->args[0], svc->name);
+        svc->flags |= SVC_DISABLED;
+        return;
+    }
+
+    NOTICE("starting '%s'\n", svc->name);
+
+    pid = fork();
+
+    if (pid == 0) {
+        struct socketinfo *si;
+        struct svcenvinfo *ei;
+        char tmp[32];
+        int fd, sz;
+
+        get_property_workspace(&fd, &sz);
+        sprintf(tmp, "%d,%d", dup(fd), sz);
+        add_environment("ANDROID_PROPERTY_WORKSPACE", tmp);
+
+        for (ei = svc->envvars; ei; ei = ei->next)
+            add_environment(ei->name, ei->value);
+
+        for (si = svc->sockets; si; si = si->next) {
+            int s = create_socket(si->name,
+                                  !strcmp(si->type, "dgram") ? 
+                                  SOCK_DGRAM : SOCK_STREAM,
+                                  si->perm, si->uid, si->gid);
+            if (s >= 0) {
+                publish_socket(si->name, s);
+            }
+        }
+
+        if (needs_console) {
+            setsid();
+            open_console();
+        } else {
+            zap_stdio();
+        }
+
+#if 0
+        for (n = 0; svc->args[n]; n++) {
+            INFO("args[%d] = '%s'\n", n, svc->args[n]);
+        }
+        for (n = 0; ENV[n]; n++) {
+            INFO("env[%d] = '%s'\n", n, ENV[n]);
+        }
+#endif
+
+        setpgid(0, getpid());
+
+	/* as requested, set our gid, supplemental gids, and uid */
+        if (svc->gid) {
+            setgid(svc->gid);
+        }
+        if (svc->nr_supp_gids) {
+            setgroups(svc->nr_supp_gids, svc->supp_gids);
+        }
+        if (svc->uid) {
+            setuid(svc->uid);
+        }
+
+        execve(svc->args[0], (char**) svc->args, (char**) ENV);
+        _exit(127);
+    }
+
+    if (pid < 0) {
+        ERROR("failed to start '%s'\n", svc->name);
+        svc->pid = 0;
+        return;
+    }
+
+    svc->time_started = gettime();
+    svc->pid = pid;
+    svc->flags |= SVC_RUNNING;
+
+    notify_service_state(svc->name, "running");
+}
+
+void service_stop(struct service *svc)
+{
+        /* we are no longer running, nor should we
+         * attempt to restart
+         */
+    svc->flags &= (~(SVC_RUNNING|SVC_RESTARTING));
+
+        /* if the service has not yet started, prevent
+         * it from auto-starting with its class
+         */
+    svc->flags |= SVC_DISABLED;
+
+    if (svc->pid) {
+        NOTICE("service '%s' is being killed\n", svc->name);
+        kill(-svc->pid, SIGTERM);
+        notify_service_state(svc->name, "stopping");
+    } else {
+        notify_service_state(svc->name, "stopped");
+    }
+}
+
+void property_changed(const char *name, const char *value)
+{
+    if (property_triggers_enabled) {
+        queue_property_triggers(name, value);
+        drain_action_queue();
+    }
+}
+
+#define CRITICAL_CRASH_THRESHOLD    4       /* if we crash >4 times ... */
+#define CRITICAL_CRASH_WINDOW       (4*60)  /* ... in 4 minutes, goto recovery*/
+
+static int wait_for_one_process(int block)
+{
+    pid_t pid;
+    int status;
+    struct service *svc;
+    struct socketinfo *si;
+    time_t now;
+    struct listnode *node;
+    struct command *cmd;
+
+    while ( (pid = waitpid(-1, &status, block ? 0 : WNOHANG)) == -1 && errno == EINTR );
+    if (pid <= 0) return -1;
+    INFO("waitpid returned pid %d, status = %08x\n", pid, status);
+
+    svc = service_find_by_pid(pid);
+    if (!svc) {
+        ERROR("untracked pid %d exited\n", pid);
+        return 0;
+    }
+
+    NOTICE("process '%s', pid %d exited\n", svc->name, pid);
+
+    if (!(svc->flags & SVC_ONESHOT)) {
+        kill(-pid, SIGKILL);
+        NOTICE("process '%s' killing any children in process group\n", svc->name);
+    }
+
+    /* remove any sockets we may have created */
+    for (si = svc->sockets; si; si = si->next) {
+        char tmp[128];
+        snprintf(tmp, sizeof(tmp), ANDROID_SOCKET_DIR"/%s", si->name);
+        unlink(tmp);
+    }
+
+    svc->pid = 0;
+    svc->flags &= (~SVC_RUNNING);
+
+        /* oneshot processes go into the disabled state on exit */
+    if (svc->flags & SVC_ONESHOT) {
+        svc->flags |= SVC_DISABLED;
+    }
+
+        /* disabled processes do not get restarted automatically */
+    if (svc->flags & SVC_DISABLED) {
+        notify_service_state(svc->name, "stopped");
+        return 0;
+    }
+
+    now = gettime();
+    if (svc->flags & SVC_CRITICAL) {
+        if (svc->time_crashed + CRITICAL_CRASH_WINDOW >= now) {
+            if (++svc->nr_crashed > CRITICAL_CRASH_THRESHOLD) {
+                ERROR("critical process '%s' exited %d times in %d minutes; "
+                      "rebooting into recovery mode\n", svc->name,
+                      CRITICAL_CRASH_THRESHOLD, CRITICAL_CRASH_WINDOW / 60);
+                sync();
+                __reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2,
+                         LINUX_REBOOT_CMD_RESTART2, "recovery");
+                return 0;
+            }
+        } else {
+            svc->time_crashed = now;
+            svc->nr_crashed = 1;
+        }
+    }
+
+    /* Execute all onrestart commands for this service. */
+    list_for_each(node, &svc->onrestart.commands) {
+        cmd = node_to_item(node, struct command, clist);
+        cmd->func(cmd->nargs, cmd->args);
+    }
+    svc->flags |= SVC_RESTARTING;
+    notify_service_state(svc->name, "restarting");
+    return 0;
+}
+
+static void restart_service_if_needed(struct service *svc)
+{
+    time_t next_start_time = svc->time_started + 5;
+
+    if (next_start_time <= gettime()) {
+        svc->flags &= (~SVC_RESTARTING);
+        service_start(svc);
+        return;
+    }
+
+    if ((next_start_time < process_needs_restart) ||
+        (process_needs_restart == 0)) {
+        process_needs_restart = next_start_time;
+    }
+}
+
+static void restart_processes()
+{
+    process_needs_restart = 0;
+    service_for_each_flags(SVC_RESTARTING,
+                           restart_service_if_needed);
+}
+
+static int signal_fd = -1;
+
+static void sigchld_handler(int s)
+{
+    write(signal_fd, &s, 1);
+}
+
+static void msg_start(const char *name)
+{
+    struct service *svc = service_find_by_name(name);
+    
+    if (svc) {
+        service_start(svc);
+    } else {
+        ERROR("no such service '%s'\n", name);
+    }
+}
+
+static void msg_stop(const char *name)
+{
+    struct service *svc = service_find_by_name(name);
+
+    if (svc) {
+        service_stop(svc);
+    } else {
+        ERROR("no such service '%s'\n");
+    }
+}
+
+void handle_control_message(const char *msg, const char *arg)
+{
+    if (!strcmp(msg,"start")) {
+        msg_start(arg);
+    } else if (!strcmp(msg,"stop")) {
+        msg_stop(arg);
+    } else {
+        ERROR("unknown control msg '%s'\n", msg);
+    }
+}
+
+#define MAX_MTD_PARTITIONS 16
+
+static struct {
+    char name[16];
+    int number;
+} mtd_part_map[MAX_MTD_PARTITIONS];
+
+static int mtd_part_count = -1;
+
+static void find_mtd_partitions(void)
+{
+    int fd;
+    char buf[1024];
+    char *pmtdbufp;
+    ssize_t pmtdsize;
+    int r;
+
+    fd = open("/proc/mtd", O_RDONLY);
+    if (fd < 0)
+        return;
+
+    buf[sizeof(buf) - 1] = '\0';
+    pmtdsize = read(fd, buf, sizeof(buf) - 1);
+    pmtdbufp = buf;
+    while (pmtdsize > 0) {
+        int mtdnum, mtdsize, mtderasesize;
+        char mtdname[16];
+        mtdname[0] = '\0';
+        mtdnum = -1;
+        r = sscanf(pmtdbufp, "mtd%d: %x %x %15s",
+                   &mtdnum, &mtdsize, &mtderasesize, mtdname);
+        if ((r == 4) && (mtdname[0] == '"')) {
+            char *x = strchr(mtdname + 1, '"');
+            if (x) {
+                *x = 0;
+            }
+            INFO("mtd partition %d, %s\n", mtdnum, mtdname + 1);
+            if (mtd_part_count < MAX_MTD_PARTITIONS) {
+                strcpy(mtd_part_map[mtd_part_count].name, mtdname + 1);
+                mtd_part_map[mtd_part_count].number = mtdnum;
+                mtd_part_count++;
+            } else {
+                ERROR("too many mtd partitions\n");
+            }
+        }
+        while (pmtdsize > 0 && *pmtdbufp != '\n') {
+            pmtdbufp++;
+            pmtdsize--;
+        }
+        if (pmtdsize > 0) {
+            pmtdbufp++;
+            pmtdsize--;
+        }
+    }
+    close(fd);
+}
+
+int mtd_name_to_number(const char *name) 
+{
+    int n;
+    if (mtd_part_count < 0) {
+        mtd_part_count = 0;
+        find_mtd_partitions();
+    }
+    for (n = 0; n < mtd_part_count; n++) {
+        if (!strcmp(name, mtd_part_map[n].name)) {
+            return mtd_part_map[n].number;
+        }
+    }
+    return -1;
+}
+
+static void import_kernel_nv(char *name, int in_qemu)
+{
+    char *value = strchr(name, '=');
+
+    if (value == 0) return;
+    *value++ = 0;
+    if (*name == 0) return;
+
+    if (!in_qemu)
+    {
+        /* on a real device, white-list the kernel options */
+        if (!strcmp(name,"qemu")) {
+            strlcpy(qemu, value, sizeof(qemu));
+        } else if (!strcmp(name,"androidboot.console")) {
+            strlcpy(console, value, sizeof(console));
+        } else if (!strcmp(name,"androidboot.mode")) {
+            strlcpy(bootmode, value, sizeof(bootmode));
+        } else if (!strcmp(name,"androidboot.serialno")) {
+            strlcpy(serialno, value, sizeof(serialno));
+        } else if (!strcmp(name,"androidboot.baseband")) {
+            strlcpy(baseband, value, sizeof(baseband));
+        } else if (!strcmp(name,"androidboot.carrier")) {
+            strlcpy(carrier, value, sizeof(carrier));
+        } else if (!strcmp(name,"androidboot.bootloader")) {
+            strlcpy(bootloader, value, sizeof(bootloader));
+        } else if (!strcmp(name,"androidboot.hardware")) {
+            strlcpy(hardware, value, sizeof(hardware));
+        } else {
+            qemu_cmdline(name, value);
+        }
+    } else {
+        /* in the emulator, export any kernel option with the
+         * ro.kernel. prefix */
+        char  buff[32];
+        int   len = snprintf( buff, sizeof(buff), "ro.kernel.%s", name );
+        if (len < (int)sizeof(buff)) {
+            property_set( buff, value );
+        }
+    }
+}
+
+static void import_kernel_cmdline(int in_qemu)
+{
+    char cmdline[1024];
+    char *ptr;
+    int fd;
+
+    fd = open("/proc/cmdline", O_RDONLY);
+    if (fd >= 0) {
+        int n = read(fd, cmdline, 1023);
+        if (n < 0) n = 0;
+
+        /* get rid of trailing newline, it happens */
+        if (n > 0 && cmdline[n-1] == '\n') n--;
+
+        cmdline[n] = 0;
+        close(fd);
+    } else {
+        cmdline[0] = 0;
+    }
+
+    ptr = cmdline;
+    while (ptr && *ptr) {
+        char *x = strchr(ptr, ' ');
+        if (x != 0) *x++ = 0;
+        import_kernel_nv(ptr, in_qemu);
+        ptr = x;
+    }
+
+        /* don't expose the raw commandline to nonpriv processes */
+    chmod("/proc/cmdline", 0440);
+}
+
+static void get_hardware_name(void)
+{
+    char data[1024];
+    int fd, n;
+    char *x, *hw, *rev;
+
+    /* Hardware string was provided on kernel command line */
+    if (hardware[0])
+        return;
+
+    fd = open("/proc/cpuinfo", O_RDONLY);
+    if (fd < 0) return;
+
+    n = read(fd, data, 1023);
+    close(fd);
+    if (n < 0) return;
+
+    data[n] = 0;
+    hw = strstr(data, "\nHardware");
+    rev = strstr(data, "\nRevision");
+
+    if (hw) {
+        x = strstr(hw, ": ");
+        if (x) {
+            x += 2;
+            n = 0;
+            while (*x && !isspace(*x)) {
+                hardware[n++] = tolower(*x);
+                x++;
+                if (n == 31) break;
+            }
+            hardware[n] = 0;
+        }
+    }
+
+    if (rev) {
+        x = strstr(rev, ": ");
+        if (x) {
+            revision = strtoul(x + 2, 0, 16);
+        }
+    }
+}
+
+static void drain_action_queue(void)
+{
+    struct listnode *node;
+    struct command *cmd;
+    struct action *act;
+    int ret;
+
+    while ((act = action_remove_queue_head())) {
+        INFO("processing action %p (%s)\n", act, act->name);
+        list_for_each(node, &act->commands) {
+            cmd = node_to_item(node, struct command, clist);
+            ret = cmd->func(cmd->nargs, cmd->args);
+            INFO("command '%s' r=%d\n", cmd->args[0], ret);
+        }
+    }
+}
+
+void open_devnull_stdio(void)
+{
+    int fd;
+    static const char *name = "/dev/__null__";
+    if (mknod(name, S_IFCHR | 0600, (1 << 8) | 3) == 0) {
+        fd = open(name, O_RDWR);
+        unlink(name);
+        if (fd >= 0) {
+            dup2(fd, 0);
+            dup2(fd, 1);
+            dup2(fd, 2);
+            if (fd > 2) {
+                close(fd);
+            }
+            return;
+        }
+    }
+
+    exit(1);
+}
+
+int main(int argc, char **argv)
+{
+    int device_fd = -1;
+    int property_set_fd = -1;
+    int signal_recv_fd = -1;
+    int s[2];
+    int fd;
+    struct sigaction act;
+    char tmp[PROP_VALUE_MAX];
+    struct pollfd ufds[4];
+    char *tmpdev;
+
+    act.sa_handler = sigchld_handler;
+    act.sa_flags = SA_NOCLDSTOP;
+    act.sa_mask = 0;
+    act.sa_restorer = NULL;
+    sigaction(SIGCHLD, &act, 0);
+
+    /* clear the umask */
+    umask(0);
+
+        /* Get the basic filesystem setup we need put
+         * together in the initramdisk on / and then we'll
+         * let the rc file figure out the rest.
+         */
+    mkdir("/dev", 0755);
+    mkdir("/proc", 0755);
+    mkdir("/sys", 0755);
+
+    mount("tmpfs", "/dev", "tmpfs", 0, "mode=0755");
+    mkdir("/dev/pts", 0755);
+    mkdir("/dev/socket", 0755);
+    mount("devpts", "/dev/pts", "devpts", 0, NULL);
+    mount("proc", "/proc", "proc", 0, NULL);
+    mount("sysfs", "/sys", "sysfs", 0, NULL);
+
+        /* We must have some place other than / to create the
+         * device nodes for kmsg and null, otherwise we won't
+         * be able to remount / read-only later on.
+         * Now that tmpfs is mounted on /dev, we can actually
+         * talk to the outside world.
+         */
+    open_devnull_stdio();
+    log_init();
+    
+    INFO("reading config file\n");
+    parse_config_file("/init.rc");
+
+    /* pull the kernel commandline and ramdisk properties file in */
+    qemu_init();
+    import_kernel_cmdline(0);
+
+    get_hardware_name();
+    snprintf(tmp, sizeof(tmp), "/init.%s.rc", hardware);
+    parse_config_file(tmp);
+
+    action_for_each_trigger("early-init", action_add_queue_tail);
+    drain_action_queue();
+
+    INFO("device init\n");
+    device_fd = device_init();
+
+    property_init();
+
+    if (console[0]) {
+        snprintf(tmp, sizeof(tmp), "/dev/%s", console);
+        console_name = strdup(tmp);
+    }
+
+    fd = open(console_name, O_RDWR);
+    if (fd >= 0)
+        have_console = 1;
+    close(fd);
+
+    if( load_565rle_image(INIT_IMAGE_FILE) ) {
+	fd = open("/dev/tty0", O_WRONLY);
+	if (fd >= 0) {
+	    const char *msg;
+            msg = "\n"
+		"\n"
+		"\n"
+		"\n"
+		"\n"
+		"\n"
+		"\n"  // console is 40 cols x 30 lines
+		"\n"
+		"\n"
+		"\n"
+		"\n"
+		"\n"
+		"\n"
+		"\n"
+		"             A N D R O I D ";
+	    write(fd, msg, strlen(msg));
+	    close(fd);
+	}
+    }
+
+    if (qemu[0])
+        import_kernel_cmdline(1); 
+
+    if (!strcmp(bootmode,"factory"))
+        property_set("ro.factorytest", "1");
+    else if (!strcmp(bootmode,"factory2"))
+        property_set("ro.factorytest", "2");
+    else
+        property_set("ro.factorytest", "0");
+
+    property_set("ro.serialno", serialno[0] ? serialno : "");
+    property_set("ro.bootmode", bootmode[0] ? bootmode : "unknown");
+    property_set("ro.baseband", baseband[0] ? baseband : "unknown");
+    property_set("ro.carrier", carrier[0] ? carrier : "unknown");
+    property_set("ro.bootloader", bootloader[0] ? bootloader : "unknown");
+
+    property_set("ro.hardware", hardware);
+    snprintf(tmp, PROP_VALUE_MAX, "%d", revision);
+    property_set("ro.revision", tmp);
+
+        /* execute all the boot actions to get us started */
+    action_for_each_trigger("init", action_add_queue_tail);
+    drain_action_queue();
+
+        /* read any property files on system or data and
+         * fire up the property service.  This must happen
+         * after the ro.foo properties are set above so
+         * that /data/local.prop cannot interfere with them.
+         */
+    property_set_fd = start_property_service();
+
+    /* create a signalling mechanism for the sigchld handler */
+    if (socketpair(AF_UNIX, SOCK_STREAM, 0, s) == 0) {
+        signal_fd = s[0];
+        signal_recv_fd = s[1];
+        fcntl(s[0], F_SETFD, FD_CLOEXEC);
+        fcntl(s[0], F_SETFL, O_NONBLOCK);
+        fcntl(s[1], F_SETFD, FD_CLOEXEC);
+        fcntl(s[1], F_SETFL, O_NONBLOCK);
+    }
+
+    /* make sure we actually have all the pieces we need */
+    if ((device_fd < 0) ||
+        (property_set_fd < 0) ||
+        (signal_recv_fd < 0)) {
+        ERROR("init startup failure\n");
+        return 1;
+    }
+
+    /* execute all the boot actions to get us started */
+    action_for_each_trigger("early-boot", action_add_queue_tail);
+    action_for_each_trigger("boot", action_add_queue_tail);
+    drain_action_queue();
+
+        /* run all property triggers based on current state of the properties */
+    queue_all_property_triggers();
+    drain_action_queue();
+
+        /* enable property triggers */   
+    property_triggers_enabled = 1;     
+
+    ufds[0].fd = device_fd;
+    ufds[0].events = POLLIN;
+    ufds[1].fd = property_set_fd;
+    ufds[1].events = POLLIN;
+    ufds[2].fd = signal_recv_fd;
+    ufds[2].events = POLLIN;
+
+#if BOOTCHART
+    if (bootchart_init() < 0)
+        ERROR("bootcharting init failure\n");
+    else {
+        NOTICE("bootcharting started\n");
+        bootchart_count = BOOTCHART_MAX_COUNT;
+    }
+#endif
+
+    for(;;) {
+        int nr, timeout = -1;
+
+        ufds[0].revents = 0;
+        ufds[1].revents = 0;
+        ufds[2].revents = 0;
+
+        drain_action_queue();
+        restart_processes();
+
+        if (process_needs_restart) {
+            timeout = (process_needs_restart - gettime()) * 1000;
+            if (timeout < 0)
+                timeout = 0;
+        }
+
+#if BOOTCHART
+        if (bootchart_count > 0) {
+            if (timeout < 0 || timeout > BOOTCHART_POLLING_MS)
+                timeout = BOOTCHART_POLLING_MS;
+            if (bootchart_step() < 0 || --bootchart_count == 0) {
+                bootchart_finish();
+                bootchart_count = 0;
+            }
+        }
+#endif
+        nr = poll(ufds, 3, timeout);
+        if (nr <= 0)
+            continue;
+
+        if (ufds[2].revents == POLLIN) {
+            /* we got a SIGCHLD - reap and restart as needed */
+            read(signal_recv_fd, tmp, sizeof(tmp));
+            while (!wait_for_one_process(0))
+                ;
+            continue;
+        }
+
+        if (ufds[0].revents == POLLIN)
+            handle_device_fd(device_fd);
+
+        if (ufds[1].revents == POLLIN)
+            handle_property_set_fd(property_set_fd);
+    }
+
+    return 0;
+}