/* System timezone handling * * Copyright (C) 2008 Novell, Inc. * * Authors: Vincent Untz * * This program 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. * * This program 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 this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. * * Some code is based on previous code in clock-location.c and on code from * tz.c (shipped with version <= 2.22.0). Those files were under the same * license, with those authors and copyrights: * * clock-location.c: * ================ * No header, but most of the work was done (AFAIK) by * Federico Mena Quintero * Matthias Clasen * * tz.c: * ==== * Copyright (C) 2000-2001 Ximian, Inc. * Copyright (C) 2004 Sun Microsystems, Inc. * * Authors: Hans Petter Jansson * additional functions by Erwann Chenede * reworked by Vincent Untz * * Largely based on Michael Fulbright's work on Anaconda. */ /* FIXME: it'd be nice to filter out the timezones that we might get when * parsing config files that are not in zone.tab. Note that it's also wrong * in some cases: eg, in tzdata2008b, Asia/Calcutta got renamed to * Asia/Kolkata and the old name is not in zone.tab. */ #include #include #include #include #include #include "system-timezone.h" /* Files that we look at and that should be monitored */ #define CHECK_NB 5 #define ETC_TIMEZONE "/etc/timezone" #define ETC_TIMEZONE_MAJ "/etc/TIMEZONE" #define ETC_RC_CONF "/etc/rc.conf" #define ETC_SYSCONFIG_CLOCK "/etc/sysconfig/clock" #define ETC_CONF_D_CLOCK "/etc/conf.d/clock" #define ETC_LOCALTIME "/etc/localtime" /* The first 4 characters in a timezone file, from tzfile.h */ #define TZ_MAGIC "TZif" static char *files_to_check[CHECK_NB] = { ETC_TIMEZONE, ETC_TIMEZONE_MAJ, ETC_SYSCONFIG_CLOCK, ETC_CONF_D_CLOCK, ETC_LOCALTIME }; static GObject *systz_singleton = NULL; G_DEFINE_TYPE (SystemTimezone, system_timezone, G_TYPE_OBJECT) typedef struct { char *tz; char *env_tz; GFileMonitor *monitors[CHECK_NB]; } SystemTimezonePrivate; enum { CHANGED, LAST_SIGNAL }; static guint system_timezone_signals[LAST_SIGNAL] = { 0 }; static GObject *system_timezone_constructor (GType type, guint n_construct_properties, GObjectConstructParam *construct_properties); static void system_timezone_finalize (GObject *obj); static void system_timezone_monitor_changed (GFileMonitor *handle, GFile *file, GFile *other_file, GFileMonitorEvent event, gpointer user_data); static char *system_timezone_find (void); #define PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), SYSTEM_TIMEZONE_TYPE, SystemTimezonePrivate)) SystemTimezone * system_timezone_new (void) { return g_object_new (SYSTEM_TIMEZONE_TYPE, NULL); } const char * system_timezone_get (SystemTimezone *systz) { SystemTimezonePrivate *priv; g_return_val_if_fail (IS_SYSTEM_TIMEZONE (systz), NULL); priv = PRIVATE (systz); return priv->tz; } const char * system_timezone_get_env (SystemTimezone *systz) { SystemTimezonePrivate *priv; g_return_val_if_fail (IS_SYSTEM_TIMEZONE (systz), NULL); priv = PRIVATE (systz); return priv->env_tz; } static void system_timezone_class_init (SystemTimezoneClass *class) { GObjectClass *g_obj_class = G_OBJECT_CLASS (class); g_obj_class->constructor = system_timezone_constructor; g_obj_class->finalize = system_timezone_finalize; system_timezone_signals[CHANGED] = g_signal_new ("changed", G_OBJECT_CLASS_TYPE (g_obj_class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (SystemTimezoneClass, changed), NULL, NULL, g_cclosure_marshal_VOID__STRING, G_TYPE_NONE, 1, G_TYPE_STRING); g_type_class_add_private (class, sizeof (SystemTimezonePrivate)); } static void system_timezone_init (SystemTimezone *systz) { int i; SystemTimezonePrivate *priv = PRIVATE (systz); priv->tz = NULL; priv->env_tz = NULL; for (i = 0; i < CHECK_NB; i++) priv->monitors[i] = NULL; } static GObject * system_timezone_constructor (GType type, guint n_construct_properties, GObjectConstructParam *construct_properties) { GObject *obj; SystemTimezonePrivate *priv; int i; /* This is a singleton, we don't need to have it per-applet */ if (systz_singleton) return g_object_ref (systz_singleton); obj = G_OBJECT_CLASS (system_timezone_parent_class)->constructor ( type, n_construct_properties, construct_properties); priv = PRIVATE (obj); priv->tz = system_timezone_find (); priv->env_tz = g_strdup (g_getenv ("TZ")); for (i = 0; i < CHECK_NB; i++) { GFile *file; GFile *parent; GFileType parent_type; file = g_file_new_for_path (files_to_check[i]); parent = g_file_get_parent (file); parent_type = g_file_query_file_type (parent, G_FILE_QUERY_INFO_NONE, NULL); g_object_unref (parent); /* We don't try to monitor the file if the parent directory * doesn't exist: this means we're on a system where this file * is not useful to determine the system timezone. * Since gio does not monitor file in non-existing directories * in a clever way (as of gio 2.22, it just polls every other * seconds to see if the directory now exists), this avoids * unnecessary wakeups. */ if (parent_type == G_FILE_TYPE_DIRECTORY) priv->monitors[i] = g_file_monitor_file (file, G_FILE_MONITOR_NONE, NULL, NULL); g_object_unref (file); if (priv->monitors[i]) g_signal_connect (G_OBJECT (priv->monitors[i]), "changed", G_CALLBACK (system_timezone_monitor_changed), obj); } systz_singleton = obj; return systz_singleton; } static void system_timezone_finalize (GObject *obj) { int i; SystemTimezonePrivate *priv = PRIVATE (obj); if (priv->tz) { g_free (priv->tz); priv->tz = NULL; } if (priv->env_tz) { g_free (priv->env_tz); priv->env_tz = NULL; } for (i = 0; i < CHECK_NB; i++) { if (priv->monitors[i]) g_object_unref (priv->monitors[i]); priv->monitors[i] = NULL; } G_OBJECT_CLASS (system_timezone_parent_class)->finalize (obj); g_assert (obj == systz_singleton); systz_singleton = NULL; } static void system_timezone_monitor_changed (GFileMonitor *handle, GFile *file, GFile *other_file, GFileMonitorEvent event, gpointer user_data) { SystemTimezonePrivate *priv = PRIVATE (user_data); char *new_tz; if (event != G_FILE_MONITOR_EVENT_CHANGED && event != G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT && event != G_FILE_MONITOR_EVENT_DELETED && event != G_FILE_MONITOR_EVENT_CREATED) return; new_tz = system_timezone_find (); g_assert (priv->tz != NULL && new_tz != NULL); if (strcmp (priv->tz, new_tz) != 0) { g_free (priv->tz); priv->tz = new_tz; g_signal_emit (G_OBJECT (user_data), system_timezone_signals[CHANGED], 0, priv->tz); } else g_free (new_tz); } /* * Code to deal with the system timezone on all distros. * There's no dependency on the SystemTimezone GObject here. * * Here's what we know: * * + /etc/localtime contains the binary data of the timezone. * It can be a symlink to the actual data file, a hard link to the data * file, or just a copy. So we can determine the timezone with this * (reading the symlink, comparing inodes, or comparing content). * * + However, most distributions also have the timezone setting * configured somewhere else. This might be better to read it from there. * * Debian/Ubuntu/Gentoo (new): content of /etc/timezone * Fedora/Mandriva: the ZONE key in /etc/sysconfig/clock * openSUSE: the TIMEZONE key in /etc/sysconfig/clock * Solaris/OpenSolaris: the TZ key in /etc/TIMEZONE * Arch Linux: the TIMEZONE key in /etc/rc.conf * Gentoo (old): the ZONE key in /etc/conf.d/clock * * FIXME: reading the system-tools-backends, it seems there's this too: * Solaris: the TZ key in /etc/default/init * /etc/TIMEZONE seems to be a link to /etc/default/init * * First, some functions to handle those system config files. * */ /* This works for Debian and derivatives (including Ubuntu), and new Gentoo */ static char * system_timezone_read_etc_timezone (void) { FILE *etc_timezone; GString *reading; int c; etc_timezone = g_fopen (ETC_TIMEZONE, "r"); if (!etc_timezone) return NULL; reading = g_string_new (""); c = fgetc (etc_timezone); /* only get the first line, we'll validate the value later */ while (c != EOF && !g_ascii_isspace (c)) { reading = g_string_append_c (reading, c); c = fgetc (etc_timezone); } fclose (etc_timezone); if (reading->str && reading->str[0] != '\0') return g_string_free (reading, FALSE); else g_string_free (reading, TRUE); return NULL; } static gboolean system_timezone_write_etc_timezone (const char *tz, GError **error) { char *content; GError *our_error; gboolean retval; if (!g_file_test (ETC_TIMEZONE, G_FILE_TEST_IS_REGULAR)) return TRUE; content = g_strdup_printf ("%s\n", tz); our_error = NULL; retval = g_file_set_contents (ETC_TIMEZONE, content, -1, &our_error); g_free (content); if (!retval) { g_set_error (error, SYSTEM_TIMEZONE_ERROR, SYSTEM_TIMEZONE_ERROR_GENERAL, ETC_TIMEZONE" cannot be overwritten: %s", our_error->message); g_error_free (our_error); } return retval; } /* Read a file that looks like a key-file (but there's no need for groups) * and get the last value for a specific key */ static char * system_timezone_read_key_file (const char *filename, const char *key) { GIOChannel *channel; char *key_eq; char *line; char *retval; if (!g_file_test (filename, G_FILE_TEST_IS_REGULAR)) return NULL; channel = g_io_channel_new_file (filename, "r", NULL); if (!channel) return NULL; key_eq = g_strdup_printf ("%s=", key); retval = NULL; while (g_io_channel_read_line (channel, &line, NULL, NULL, NULL) == G_IO_STATUS_NORMAL) { if (g_str_has_prefix (line, key_eq)) { char *value; int len; value = line + strlen (key_eq); g_strstrip (value); len = strlen (value); if (value[0] == '\"') { if (value[len - 1] == '\"') { if (retval) g_free (retval); retval = g_strndup (value + 1, len - 2); } } else { if (retval) g_free (retval); retval = g_strdup (line + strlen (key_eq)); } g_strstrip (retval); } g_free (line); } g_free (key_eq); g_io_channel_unref (channel); return retval; } static gboolean system_timezone_write_key_file (const char *filename, const char *key, const char *value, GError **error) { GError *our_error; char *content; gsize len; char *key_eq; char **lines; gboolean replaced; gboolean retval; int n; if (!g_file_test (filename, G_FILE_TEST_IS_REGULAR)) return TRUE; our_error = NULL; if (!g_file_get_contents (filename, &content, &len, &our_error)) { g_set_error (error, SYSTEM_TIMEZONE_ERROR, SYSTEM_TIMEZONE_ERROR_GENERAL, "%s cannot be read: %s", filename, our_error->message); g_error_free (our_error); return FALSE; } lines = g_strsplit (content, "\n", 0); g_free (content); key_eq = g_strdup_printf ("%s=", key); replaced = FALSE; for (n = 0; lines[n] != NULL; n++) { if (g_str_has_prefix (lines[n], key_eq)) { char *old_value; gboolean use_quotes; old_value = lines[n] + strlen (key_eq); g_strstrip (old_value); use_quotes = old_value[0] == '\"'; g_free (lines[n]); if (use_quotes) lines[n] = g_strdup_printf ("%s\"%s\"", key_eq, value); else lines[n] = g_strdup_printf ("%s%s", key_eq, value); replaced = TRUE; } } g_free (key_eq); if (!replaced) { g_strfreev (lines); return TRUE; } content = g_strjoinv ("\n", lines); g_strfreev (lines); retval = g_file_set_contents (filename, content, -1, &our_error); g_free (content); if (!retval) { g_set_error (error, SYSTEM_TIMEZONE_ERROR, SYSTEM_TIMEZONE_ERROR_GENERAL, "%s cannot be overwritten: %s", filename, our_error->message); g_error_free (our_error); } return retval; } /* This works for Solaris/OpenSolaris */ static char * system_timezone_read_etc_TIMEZONE (void) { return system_timezone_read_key_file (ETC_TIMEZONE_MAJ, "TZ"); } static gboolean system_timezone_write_etc_TIMEZONE (const char *tz, GError **error) { return system_timezone_write_key_file (ETC_TIMEZONE_MAJ, "TZ", tz, error); } /* This works for Fedora and Mandriva */ static char * system_timezone_read_etc_sysconfig_clock (void) { return system_timezone_read_key_file (ETC_SYSCONFIG_CLOCK, "ZONE"); } static gboolean system_timezone_write_etc_sysconfig_clock (const char *tz, GError **error) { return system_timezone_write_key_file (ETC_SYSCONFIG_CLOCK, "ZONE", tz, error); } /* This works for openSUSE */ static char * system_timezone_read_etc_sysconfig_clock_alt (void) { return system_timezone_read_key_file (ETC_SYSCONFIG_CLOCK, "TIMEZONE"); } static gboolean system_timezone_write_etc_sysconfig_clock_alt (const char *tz, GError **error) { return system_timezone_write_key_file (ETC_SYSCONFIG_CLOCK, "TIMEZONE", tz, error); } /* This works for old Gentoo */ static char * system_timezone_read_etc_conf_d_clock (void) { return system_timezone_read_key_file (ETC_CONF_D_CLOCK, "TIMEZONE"); } static gboolean system_timezone_write_etc_conf_d_clock (const char *tz, GError **error) { return system_timezone_write_key_file (ETC_CONF_D_CLOCK, "TIMEZONE", tz, error); } /* This works for Arch Linux */ static char * system_timezone_read_etc_rc_conf (void) { return system_timezone_read_key_file (ETC_RC_CONF, "TIMEZONE"); } static gboolean system_timezone_write_etc_rc_conf (const char *tz, GError **error) { return system_timezone_write_key_file (ETC_RC_CONF, "TIMEZONE", tz, error); } /* * * First, getting the timezone. * */ static char * system_timezone_strip_path_if_valid (const char *filename) { int skip; if (!filename || !g_str_has_prefix (filename, SYSTEM_ZONEINFODIR"/")) return NULL; /* Timezone data files also live under posix/ and right/ for some * reason. * FIXME: make sure accepting those files is valid. I think "posix" is * okay, not sure about "right" */ if (g_str_has_prefix (filename, SYSTEM_ZONEINFODIR"/posix/")) skip = strlen (SYSTEM_ZONEINFODIR"/posix/"); else if (g_str_has_prefix (filename, SYSTEM_ZONEINFODIR"/right/")) skip = strlen (SYSTEM_ZONEINFODIR"/right/"); else skip = strlen (SYSTEM_ZONEINFODIR"/"); return g_strdup (filename + skip); } /* Read the soft symlink from /etc/localtime */ static char * system_timezone_read_etc_localtime_softlink (void) { char *file; char *tz; if (!g_file_test (ETC_LOCALTIME, G_FILE_TEST_IS_SYMLINK)) return NULL; file = g_file_read_link (ETC_LOCALTIME, NULL); if (!g_path_is_absolute (file)) { GFile *gf1; GFile *gf2; /* Resolve relative path. */ gf1 = g_file_new_for_path (ETC_LOCALTIME); gf2 = g_file_get_parent (gf1); g_object_unref (gf1); gf1 = g_file_resolve_relative_path (gf2, file); g_object_unref (gf2); g_free (file); file = g_file_get_path (gf1); g_object_unref (gf1); } tz = system_timezone_strip_path_if_valid (file); g_free (file); return tz; } typedef gboolean (*CompareFiles) (struct stat *a_stat, struct stat *b_stat, const char *a_content, gsize a_content_len, const char *b_filename); static char * recursive_compare (struct stat *localtime_stat, const char *localtime_content, gsize localtime_content_len, char *file, CompareFiles compare_func) { struct stat file_stat; if (g_stat (file, &file_stat) != 0) return NULL; if (S_ISREG (file_stat.st_mode)) { if (compare_func (localtime_stat, &file_stat, localtime_content, localtime_content_len, file)) return system_timezone_strip_path_if_valid (file); else return NULL; } else if (S_ISDIR (file_stat.st_mode)) { GDir *dir = NULL; char *ret = NULL; const char *subfile = NULL; char *subpath = NULL; dir = g_dir_open (file, 0, NULL); if (dir == NULL) return NULL; while ((subfile = g_dir_read_name (dir)) != NULL) { subpath = g_build_filename (file, subfile, NULL); ret = recursive_compare (localtime_stat, localtime_content, localtime_content_len, subpath, compare_func); g_free (subpath); if (ret != NULL) break; } g_dir_close (dir); return ret; } return NULL; } static gboolean files_are_identical_inode (struct stat *a_stat, struct stat *b_stat, const char *a_content, gsize a_content_len, const char *b_filename) { return (a_stat->st_ino == b_stat->st_ino); } /* Determine if /etc/localtime is a hard link to some file, by looking at * the inodes */ static char * system_timezone_read_etc_localtime_hardlink (void) { struct stat stat_localtime; if (g_stat (ETC_LOCALTIME, &stat_localtime) != 0) return NULL; if (!S_ISREG (stat_localtime.st_mode)) return NULL; return recursive_compare (&stat_localtime, NULL, 0, SYSTEM_ZONEINFODIR, files_are_identical_inode); } static gboolean files_are_identical_content (struct stat *a_stat, struct stat *b_stat, const char *a_content, gsize a_content_len, const char *b_filename) { char *b_content = NULL; gsize b_content_len = -1; int cmp; if (a_stat->st_size != b_stat->st_size) return FALSE; if (!g_file_get_contents (b_filename, &b_content, &b_content_len, NULL)) return FALSE; if (a_content_len != b_content_len) { g_free (b_content); return FALSE; } cmp = memcmp (a_content, b_content, a_content_len); g_free (b_content); return (cmp == 0); } /* Determine if /etc/localtime is a copy of a timezone file */ static char * system_timezone_read_etc_localtime_content (void) { struct stat stat_localtime; char *localtime_content = NULL; gsize localtime_content_len = -1; char *retval; if (g_stat (ETC_LOCALTIME, &stat_localtime) != 0) return NULL; if (!S_ISREG (stat_localtime.st_mode)) return NULL; if (!g_file_get_contents (ETC_LOCALTIME, &localtime_content, &localtime_content_len, NULL)) return NULL; retval = recursive_compare (&stat_localtime, localtime_content, localtime_content_len, SYSTEM_ZONEINFODIR, files_are_identical_content); g_free (localtime_content); return retval; } typedef char * (*GetSystemTimezone) (void); /* The order of the functions here define the priority of the methods used * to find the timezone. First method has higher priority. */ static GetSystemTimezone get_system_timezone_methods[] = { /* cheap and "more correct" than data from a config file */ system_timezone_read_etc_localtime_softlink, /* reading various config files */ system_timezone_read_etc_timezone, system_timezone_read_etc_sysconfig_clock, system_timezone_read_etc_sysconfig_clock_alt, system_timezone_read_etc_TIMEZONE, system_timezone_read_etc_rc_conf, /* reading deprecated config files */ system_timezone_read_etc_conf_d_clock, /* reading /etc/timezone directly. Expensive since we have to stat * many files */ system_timezone_read_etc_localtime_hardlink, system_timezone_read_etc_localtime_content, NULL }; static gboolean system_timezone_is_valid (const char *tz) { const char *c; if (!tz) return FALSE; for (c = tz; *c != '\0'; c++) { if (!(g_ascii_isalnum (*c) || *c == '/' || *c == '-' || *c == '_')) return FALSE; } return TRUE; } static char * system_timezone_find (void) { char *tz; int i; for (i = 0; get_system_timezone_methods[i] != NULL; i++) { tz = get_system_timezone_methods[i] (); if (system_timezone_is_valid (tz)) return tz; g_free (tz); } return g_strdup ("UTC"); } /* * * Now, setting the timezone. * */ static gboolean system_timezone_is_zone_file_valid (const char *zone_file, GError **error) { GError *our_error; GIOChannel *channel; char buffer[strlen (TZ_MAGIC)]; gsize read; /* First, check the zone_file is properly rooted */ if (!g_str_has_prefix (zone_file, SYSTEM_ZONEINFODIR"/")) { g_set_error (error, SYSTEM_TIMEZONE_ERROR, SYSTEM_TIMEZONE_ERROR_INVALID_TIMEZONE_FILE, "Timezone file needs to be under "SYSTEM_ZONEINFODIR); return FALSE; } /* Second, check it's a regular file that exists */ if (!g_file_test (zone_file, G_FILE_TEST_IS_REGULAR)) { g_set_error (error, SYSTEM_TIMEZONE_ERROR, SYSTEM_TIMEZONE_ERROR_INVALID_TIMEZONE_FILE, "No such timezone file %s", zone_file); return FALSE; } /* Third, check that it's a tzfile (see tzfile(5)). The file has a 4 * bytes header which is TZ_MAGIC. * * TODO: is there glibc API for this? */ our_error = NULL; channel = g_io_channel_new_file (zone_file, "r", &our_error); if (!our_error) g_io_channel_read_chars (channel, buffer, strlen (TZ_MAGIC), &read, &our_error); if (channel) g_io_channel_unref (channel); if (our_error) { g_set_error (error, SYSTEM_TIMEZONE_ERROR, SYSTEM_TIMEZONE_ERROR_INVALID_TIMEZONE_FILE, "Timezone file %s cannot be read: %s", zone_file, our_error->message); g_error_free (our_error); return FALSE; } if (read != strlen (TZ_MAGIC) || strncmp (buffer, TZ_MAGIC, strlen (TZ_MAGIC)) != 0) { g_set_error (error, SYSTEM_TIMEZONE_ERROR, SYSTEM_TIMEZONE_ERROR_INVALID_TIMEZONE_FILE, "%s is not a timezone file", zone_file); return FALSE; } return TRUE; } static gboolean system_timezone_set_etc_timezone (const char *zone_file, GError **error) { GError *our_error; char *content; gsize len; if (!system_timezone_is_zone_file_valid (zone_file, error)) return FALSE; /* If /etc/localtime is a symlink, write a symlink */ if (g_file_test (ETC_LOCALTIME, G_FILE_TEST_IS_SYMLINK)) { if (g_unlink (ETC_LOCALTIME) == 0 && symlink (zone_file, ETC_LOCALTIME) == 0) return TRUE; /* If we couldn't symlink the file, we'll just fallback on * copying it */ } /* Else copy the file to /etc/localtime. We explicitly avoid doing * hard links since they break with different partitions */ our_error = NULL; if (!g_file_get_contents (zone_file, &content, &len, &our_error)) { g_set_error (error, SYSTEM_TIMEZONE_ERROR, SYSTEM_TIMEZONE_ERROR_GENERAL, "Timezone file %s cannot be read: %s", zone_file, our_error->message); g_error_free (our_error); return FALSE; } if (!g_file_set_contents (ETC_LOCALTIME, content, len, &our_error)) { g_set_error (error, SYSTEM_TIMEZONE_ERROR, SYSTEM_TIMEZONE_ERROR_GENERAL, ETC_LOCALTIME" cannot be overwritten: %s", our_error->message); g_error_free (our_error); g_free (content); return FALSE; } g_free (content); return TRUE; } typedef gboolean (*SetSystemTimezone) (const char *tz, GError **error); /* The order here does not matter too much: we'll try to change all files * that already have a timezone configured. It matters in case of error, * since the process will be stopped and the last methods won't be called. * So we use the same order as in get_system_timezone_methods */ static SetSystemTimezone set_system_timezone_methods[] = { /* writing various config files if they exist and have the * setting already present */ system_timezone_write_etc_timezone, system_timezone_write_etc_sysconfig_clock, system_timezone_write_etc_sysconfig_clock_alt, system_timezone_write_etc_TIMEZONE, system_timezone_write_etc_rc_conf, /* writing deprecated config files if they exist and have the * setting already present */ system_timezone_write_etc_conf_d_clock, NULL }; static gboolean system_timezone_update_config (const char *tz, GError **error) { int i; for (i = 0; set_system_timezone_methods[i] != NULL; i++) { if (!set_system_timezone_methods[i] (tz, error)) return FALSE; /* FIXME: maybe continue to change all config files if * possible? */ } return TRUE; } gboolean system_timezone_set_from_file (const char *zone_file, GError **error) { const char *tz; g_return_val_if_fail (error == NULL || *error == NULL, FALSE); tz = zone_file + strlen (SYSTEM_ZONEINFODIR"/"); /* FIXME: is it right to return FALSE even when /etc/localtime was * changed but not the config files? */ return (system_timezone_set_etc_timezone (zone_file, error) && system_timezone_update_config (tz, error)); } gboolean system_timezone_set (const char *tz, GError **error) { char *zone_file; gboolean retval; g_return_val_if_fail (error == NULL || *error == NULL, FALSE); zone_file = g_build_filename (SYSTEM_ZONEINFODIR, tz, NULL); /* FIXME: is it right to return FALSE even when /etc/localtime was * changed but not the config files? */ retval = system_timezone_set_etc_timezone (zone_file, error) && system_timezone_update_config (tz, error); g_free (zone_file); return retval; } GQuark system_timezone_error_quark (void) { static GQuark ret = 0; if (ret == 0) { ret = g_quark_from_static_string ("system-timezone-error"); } return ret; }