*
* Connection Manager
*
- * Copyright (C) 2007-2010 Intel Corporation. All rights reserved.
+ * Copyright (C) 2007-2012 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
#include <config.h>
#endif
+#define _GNU_SOURCE
+#include <errno.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <sys/inotify.h>
+
+#include <glib.h>
+
#include "connman.h"
-char *__connman_timezone_lookup(void)
+#define ETC_LOCALTIME "/etc/localtime"
+#define ETC_SYSCONFIG_CLOCK "/etc/sysconfig/clock"
+#define USR_SHARE_ZONEINFO "/usr/share/zoneinfo"
+
+static char *read_key_file(const char *pathname, const char *key)
+{
+ struct stat st;
+ char *map, *ptr, *str;
+ off_t ptrlen, keylen;
+ int fd;
+
+ fd = open(pathname, O_RDONLY | O_CLOEXEC);
+ if (fd < 0)
+ return NULL;
+
+ if (fstat(fd, &st) < 0) {
+ close(fd);
+ return NULL;
+ }
+
+ map = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
+ if (map == NULL || map == MAP_FAILED) {
+ close(fd);
+ return NULL;
+ }
+
+ ptr = map;
+ ptrlen = st.st_size;
+ keylen = strlen(key);
+
+ while (ptrlen > keylen + 1) {
+ int cmp = strncmp(ptr, key, keylen);
+
+ if (cmp == 0) {
+ if (ptr == map)
+ break;
+
+ if (*(ptr - 1) == '\n' && *(ptr + keylen) == '=')
+ break;
+ }
+
+ ptr = memchr(ptr + 1, key[0], ptrlen - 1);
+ if (ptr == NULL)
+ break;
+
+ ptrlen = st.st_size - (ptr - map);
+ }
+
+ if (ptr != NULL) {
+ char *end, *val;
+
+ ptrlen = st.st_size - (ptr - map);
+
+ end = memchr(ptr, '\n', ptrlen);
+ if (end != NULL)
+ ptrlen = end - ptr;
+
+ val = memchr(ptr, '"', ptrlen);
+ if (val != NULL) {
+ end = memchr(val + 1, '"', end - val - 1);
+ if (end != NULL)
+ str = g_strndup(val + 1, end - val - 1);
+ else
+ str = NULL;
+ } else
+ str = g_strndup(ptr + keylen + 1, ptrlen - keylen - 1);
+ } else
+ str = NULL;
+
+ munmap(map, st.st_size);
+
+ close(fd);
+
+ return str;
+}
+
+static int compare_file(void *src_map, struct stat *src_st,
+ const char *pathname)
{
+ struct stat dst_st;
+ void *dst_map;
+ int fd, result;
+
+ fd = open(pathname, O_RDONLY | O_CLOEXEC);
+ if (fd < 0)
+ return -1;
+
+ if (fstat(fd, &dst_st) < 0) {
+ close(fd);
+ return -1;
+ }
+
+ if (src_st->st_size != dst_st.st_size) {
+ close(fd);
+ return -1;
+ }
+
+ dst_map = mmap(0, dst_st.st_size, PROT_READ, MAP_SHARED, fd, 0);
+ if (dst_map == NULL || dst_map == MAP_FAILED) {
+ close(fd);
+ return -1;
+ }
+
+ result = memcmp(src_map, dst_map, src_st->st_size);
+
+ munmap(dst_map, dst_st.st_size);
+
+ close(fd);
+
+ return result;
+}
+
+static char *find_origin(void *src_map, struct stat *src_st,
+ const char *basepath, const char *subpath)
+{
+ DIR *dir;
+ struct dirent *d;
+ char *str, pathname[PATH_MAX];
+
+ if (subpath == NULL)
+ strncpy(pathname, basepath, sizeof(pathname));
+ else
+ snprintf(pathname, sizeof(pathname),
+ "%s/%s", basepath, subpath);
+
+ dir = opendir(pathname);
+ if (dir == NULL)
+ return NULL;
+
+ while ((d = readdir(dir))) {
+ if (strcmp(d->d_name, ".") == 0 ||
+ strcmp(d->d_name, "..") == 0 ||
+ strcmp(d->d_name, "posix") == 0 ||
+ strcmp(d->d_name, "right") == 0)
+ continue;
+
+ switch (d->d_type) {
+ case DT_REG:
+ if (subpath == NULL)
+ snprintf(pathname, PATH_MAX,
+ "%s/%s", basepath, d->d_name);
+ else
+ snprintf(pathname, PATH_MAX,
+ "%s/%s/%s", basepath,
+ subpath, d->d_name);
+
+ if (compare_file(src_map, src_st, pathname) == 0) {
+ str = g_strdup_printf("%s/%s",
+ subpath, d->d_name);
+ closedir(dir);
+ return str;
+ }
+ break;
+ case DT_DIR:
+ if (subpath == NULL)
+ strncpy(pathname, d->d_name, sizeof(pathname));
+ else
+ snprintf(pathname, sizeof(pathname),
+ "%s/%s", subpath, d->d_name);
+
+ str = find_origin(src_map, src_st, basepath, pathname);
+ if (str != NULL) {
+ closedir(dir);
+ return str;
+ }
+ break;
+ }
+ }
+
+ closedir(dir);
+
return NULL;
}
+
+char *__connman_timezone_lookup(void)
+{
+ struct stat st;
+ void *map;
+ int fd;
+ char *zone;
+
+ zone = read_key_file(ETC_SYSCONFIG_CLOCK, "ZONE");
+
+ DBG("sysconfig zone %s", zone);
+
+ fd = open(ETC_LOCALTIME, O_RDONLY | O_CLOEXEC);
+ if (fd < 0) {
+ g_free(zone);
+ return NULL;
+ }
+
+ if (fstat(fd, &st) < 0)
+ goto done;
+
+ if (S_ISREG(st.st_mode)) {
+ map = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
+ if (map == NULL || map == MAP_FAILED) {
+ g_free(zone);
+ zone = NULL;
+
+ goto done;
+ }
+
+ if (zone != NULL) {
+ char pathname[PATH_MAX];
+
+ snprintf(pathname, PATH_MAX, "%s/%s",
+ USR_SHARE_ZONEINFO, zone);
+
+ if (compare_file(map, &st, pathname) != 0) {
+ g_free(zone);
+ zone = NULL;
+ }
+ }
+
+ if (zone == NULL)
+ zone = find_origin(map, &st, USR_SHARE_ZONEINFO, NULL);
+
+ munmap(map, st.st_size);
+ } else {
+ g_free(zone);
+ zone = NULL;
+ }
+
+done:
+ close(fd);
+
+ DBG("localtime zone %s", zone);
+
+ return zone;
+}
+
+static int write_file(void *src_map, struct stat *src_st, const char *pathname)
+{
+ struct stat st;
+ int fd;
+ ssize_t written;
+
+ DBG("pathname %s", pathname);
+
+ if (lstat(pathname, &st) == 0) {
+ if (S_ISLNK(st.st_mode))
+ unlink(pathname);
+ }
+
+ fd = open(pathname, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, 0644);
+ if (fd < 0)
+ return -EIO;
+
+ written = write(fd, src_map, src_st->st_size);
+
+ close(fd);
+
+ if (written < 0)
+ return -EIO;
+
+ return 0;
+}
+
+int __connman_timezone_change(const char *zone)
+{
+ struct stat st;
+ char *map, pathname[PATH_MAX];
+ int fd, err;
+
+ DBG("zone %s", zone);
+
+ snprintf(pathname, PATH_MAX, "%s/%s", USR_SHARE_ZONEINFO, zone);
+
+ fd = open(pathname, O_RDONLY | O_CLOEXEC);
+ if (fd < 0)
+ return -EINVAL;
+
+ if (fstat(fd, &st) < 0) {
+ close(fd);
+ return -EIO;
+ }
+
+ map = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
+ if (map == NULL || map == MAP_FAILED) {
+ close(fd);
+ return -EIO;
+ }
+
+ err = write_file(map, &st, ETC_LOCALTIME);
+
+ munmap(map, st.st_size);
+
+ close(fd);
+
+ return err;
+}
+
+static guint inotify_watch = 0;
+
+static gboolean inotify_data(GIOChannel *channel, GIOCondition cond,
+ gpointer user_data)
+{
+ char buffer[256];
+ void *ptr = buffer;
+ GIOStatus status;
+ gsize bytes_read;
+
+ DBG("");
+
+ if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
+ inotify_watch = 0;
+ return FALSE;
+ }
+
+ status = g_io_channel_read_chars(channel, buffer, sizeof(buffer),
+ &bytes_read, NULL);
+
+ switch (status) {
+ case G_IO_STATUS_NORMAL:
+ break;
+ case G_IO_STATUS_AGAIN:
+ return TRUE;
+ default:
+ inotify_watch = 0;
+ return FALSE;
+ }
+
+ DBG("bytes read %zd", bytes_read);
+
+ while (bytes_read > 0) {
+ struct inotify_event *event = ptr;
+
+ if (bytes_read < sizeof(*event))
+ break;
+
+ ptr += sizeof(*event);
+ bytes_read -= sizeof(*event);
+
+ if (event->len == 0)
+ continue;
+
+ if (bytes_read < event->len)
+ break;
+
+ ptr += event->len;
+ bytes_read -= event->len;
+
+ if (g_strcmp0(event->name, "localtime") == 0)
+ __connman_clock_update_timezone();
+ }
+
+ return TRUE;
+}
+
+int __connman_timezone_init(void)
+{
+ GIOChannel *channel;
+ char *dirname;
+ int fd, wd;
+
+ DBG("");
+
+ fd = inotify_init1(IN_NONBLOCK | IN_CLOEXEC);
+ if (fd < 0)
+ return -EIO;
+
+ channel = g_io_channel_unix_new(fd);
+ if (channel == NULL) {
+ close(fd);
+ return -EIO;
+ }
+
+ g_io_channel_set_close_on_unref(channel, TRUE);
+ g_io_channel_set_encoding(channel, NULL, NULL);
+ g_io_channel_set_buffered(channel, FALSE);
+
+ inotify_watch = g_io_add_watch(channel,
+ G_IO_IN | G_IO_HUP | G_IO_NVAL | G_IO_ERR,
+ inotify_data, NULL);
+
+ g_io_channel_unref(channel);
+
+ dirname = g_path_get_dirname(ETC_LOCALTIME);
+
+ wd = inotify_add_watch(fd, dirname, IN_DONT_FOLLOW |
+ IN_CLOSE_WRITE | IN_MOVED_TO);
+
+ g_free(dirname);
+
+ if (wd < 0)
+ return -EIO;
+
+ return 0;
+}
+
+void __connman_timezone_cleanup(void)
+{
+ DBG("");
+
+ if (inotify_watch > 0) {
+ g_source_remove(inotify_watch);
+ inotify_watch = 0;
+ }
+}
projects / framework / connectivity / connman.git / blobdiff