diff options
Diffstat (limited to 'samsung-ipc/util.c')
| -rw-r--r-- | samsung-ipc/util.c | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/samsung-ipc/util.c b/samsung-ipc/util.c new file mode 100644 index 0000000..85fffcb --- /dev/null +++ b/samsung-ipc/util.c @@ -0,0 +1,282 @@ +/* + * This file is part of libsamsung-ipc. + * + * Copyright (C) 2013 Paul Kocialkowski <contact@paulk.fr> + * + * libsamsung-ipc is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * libsamsung-ipc is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with libsamsung-ipc. If not, see <http://www.gnu.org/licenses/>. + * + */ + +#include <stdio.h> +#include <stdlib.h> +#include <stdint.h> +#include <string.h> +#include <fcntl.h> +#include <ctype.h> +#include <sys/ioctl.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <asm/types.h> +#include <mtd/mtd-abi.h> +#include <linux/netlink.h> +#include <net/if.h> + +#include "util.h" + +void *file_data_read(char *path, int size, int block_size) +{ + void *data = NULL; + int fd = -1; + + unsigned char *p; + int count; + int rc; + + if (path == NULL || size <= 0 || block_size <= 0) + return NULL; + + fd = open(path, O_RDONLY); + if (fd < 0) + goto error; + + data = malloc(size); + memset(data, 0, size); + + p = (unsigned char *) data; + + count = 0; + while (count < size) { + rc = read(fd, p, size - count > block_size ? block_size : size - count); + if (rc < 0) + goto error; + + p += rc; + count += rc; + } + + goto complete; + +error: + if (data != NULL) + free(data); + data = NULL; + +complete: + if (fd >= 0) + close(fd); + + return data; +} + +int network_iface_up(char *iface, int domain, int type) +{ + struct ifreq ifr; + int fd = -1; + int rc; + + if (iface == NULL) + return -1; + + memset(&ifr, 0, sizeof(ifr)); + strncpy(ifr.ifr_name, iface, IFNAMSIZ); + + fd = socket(domain, type, 0); + if (fd < 0) + goto error; + + rc = ioctl(fd, SIOCGIFFLAGS, &ifr); + if (rc < 0) + goto error; + + ifr.ifr_flags |= IFF_UP; + + rc = ioctl(fd, SIOCSIFFLAGS, &ifr); + if (rc < 0) + goto error; + + rc = 0; + goto complete; + +error: + rc = -1; + +complete: + if (fd >= 0) + close(fd); + + return rc; +} + +int network_iface_down(char *iface, int domain, int type) +{ + struct ifreq ifr; + int fd = -1; + int rc; + + if (iface == NULL) + return -1; + + memset(&ifr, 0, sizeof(ifr)); + strncpy(ifr.ifr_name, iface, IFNAMSIZ); + + fd = socket(domain, type, 0); + if (fd < 0) + goto error; + + rc = ioctl(fd, SIOCGIFFLAGS, &ifr); + if (rc < 0) + goto error; + + ifr.ifr_flags = (ifr.ifr_flags & (~IFF_UP)); + + rc = ioctl(fd, SIOCSIFFLAGS, &ifr); + if (rc < 0) + goto error; + + rc = 0; + goto complete; + +error: + rc = -1; + +complete: + if (fd >= 0) + close(fd); + + return rc; +} + +int sysfs_value_read(char *path) +{ + char buffer[100]; + int value; + int fd = -1; + int rc; + + if (path == NULL) + return -1; + + fd = open(path, O_RDONLY); + if (fd < 0) + goto error; + + rc = read(fd, &buffer, sizeof(buffer)); + if (rc <= 0) + goto error; + + value = atoi(buffer); + goto complete; + +error: + value = -1; + +complete: + if (fd >= 0) + close(fd); + + return value; +} + +int sysfs_value_write(char *path, int value) +{ + char buffer[100]; + int fd = -1; + int rc; + + if (path == NULL) + return -1; + + fd = open(path, O_WRONLY); + if (fd < 0) + goto error; + + snprintf((char *) &buffer, sizeof(buffer), "%d\n", value); + + rc = write(fd, buffer, strlen(buffer)); + if (rc < (int) strlen(buffer)) + goto error; + + rc = 0; + goto complete; + +error: + rc = -1; + +complete: + if (fd >= 0) + close(fd); + + return rc; +} + +int sysfs_string_read(char *path, char *buffer, int length) +{ + int fd = -1; + int rc; + + if (path == NULL || buffer == NULL || length <= 0) + return -1; + + fd = open(path, O_RDONLY); + if (fd < 0) + goto error; + + rc = read(fd, buffer, length); + if (rc <= 0) + goto error; + + rc = 0; + goto complete; + +error: + rc = -1; + +complete: + if (fd >= 0) + close(fd); + + return rc; +} + +int sysfs_string_write(char *path, char *buffer, int length) +{ + int fd = -1; + int rc; + + if (path == NULL || buffer == NULL || length <= 0) + return -1; + + fd = open(path, O_WRONLY); + if (fd < 0) + goto error; + + rc = write(fd, buffer, length); + if (rc <= 0) + goto error; + + rc = 0; + goto complete; + +error: + rc = -1; + +complete: + if (fd >= 0) + close(fd); + + return rc; +} + +// vim:ts=4:sw=4:expandtab |