chiark / gitweb /
systemctl: try to reload daemon after enable/disable only when not running in a chroot
[elogind.git] / src / timedate / timedated.c
index 9ca2eec5a8aa18ea3ae7ad0443c8c5721a3f14ff..80c24eb62b029f67470ddd3f919f350711d15b44 100644 (file)
@@ -34,6 +34,9 @@
 #include "def.h"
 #include "hwclock.h"
 #include "conf-files.h"
+#include "path-util.h"
+#include "fileio-label.h"
+#include "label.h"
 
 #define NULL_ADJTIME_UTC "0.0 0 0\n0\nUTC\n"
 #define NULL_ADJTIME_LOCAL "0.0 0 0\n0\nLOCAL\n"
@@ -76,9 +79,6 @@
         BUS_GENERIC_INTERFACES_LIST             \
         "org.freedesktop.timedate1\0"
 
-/* Must start and end with '/' */
-#define ZONEINFO_PATH "/usr/share/zoneinfo/"
-
 const char timedate_interface[] _introspect_("timedate1") = INTERFACE;
 
 typedef struct TZ {
@@ -132,7 +132,7 @@ static bool valid_timezone(const char *name) {
         if (slash)
                 return false;
 
-        t = strappend(ZONEINFO_PATH, name);
+        t = strappend("/usr/share/zoneinfo/", name);
         if (!t)
                 return false;
 
@@ -148,56 +148,29 @@ static bool valid_timezone(const char *name) {
         return true;
 }
 
-static void verify_timezone(void) {
-        char *p, *a = NULL, *b = NULL;
-        size_t l, q;
-        int j, k;
-
-        if (!tz.zone)
-                return;
-
-        p = strappend(ZONEINFO_PATH, tz.zone);
-        if (!p) {
-                log_oom();
-                return;
-        }
-
-        k = read_full_file(p, &b, &q);
-        free(p);
-
-        j = read_full_file("/etc/localtime", &a, &l);
-
-        if (j < 0 || k < 0 || l != q || memcmp(a, b, l)) {
-                log_warning("/etc/localtime and /etc/timezone out of sync.");
-                free(tz.zone);
-                tz.zone = NULL;
-        }
-
-        free(a);
-        free(b);
-}
-
 static int read_data(void) {
         int r;
-        char *t = NULL;
+        _cleanup_free_ char *t = NULL;
 
         free_data();
 
         r = readlink_malloc("/etc/localtime", &t);
         if (r < 0) {
                 if (r == -EINVAL)
-                        log_warning("/etc/localtime should be a symbolic link to a timezone data file in " ZONEINFO_PATH);
+                        log_warning("/etc/localtime should be a symbolic link to a timezone data file in /usr/share/zoneinfo/.");
                 else
-                        log_warning("Failed to get target of %s: %s", "/etc/localtime", strerror(-r));
+                        log_warning("Failed to get target of /etc/localtime: %s", strerror(-r));
         } else {
-                /* we only support the trivial relative link of (/etc/)..$ABSOLUTE */
-                int rel_link_offset = startswith(t, "..") ? strlen("..") : 0;
+                const char *e;
 
-                if (!startswith(t + rel_link_offset, ZONEINFO_PATH))
-                        log_warning("/etc/localtime should be a symbolic link to a timezone data file in " ZONEINFO_PATH);
+                e = path_startswith(t, "/usr/share/zoneinfo/");
+                if (!e)
+                        e = path_startswith(t, "../usr/share/zoneinfo/");
+
+                if (!e)
+                        log_warning("/etc/localtime should be a symbolic link to a timezone data file in /usr/share/zoneinfo/.");
                 else {
-                        tz.zone = strdup(t + rel_link_offset + strlen(ZONEINFO_PATH));
-                        free(t);
+                        tz.zone = strdup(e);
                         if (!tz.zone)
                                 return log_oom();
 
@@ -205,31 +178,12 @@ static int read_data(void) {
                 }
         }
 
-        free(t);
-
-        r = read_one_line_file("/etc/timezone", &tz.zone);
-        if (r < 0) {
-                if (r != -ENOENT)
-                        log_warning("Failed to read /etc/timezone: %s", strerror(-r));
-
-#ifdef TARGET_FEDORA
-                r = parse_env_file("/etc/sysconfig/clock", NEWLINE,
-                                   "ZONE", &tz.zone,
-                                   NULL);
-
-                if (r < 0 && r != -ENOENT)
-                        log_warning("Failed to read /etc/sysconfig/clock: %s", strerror(-r));
-#endif
-        }
-
 have_timezone:
         if (isempty(tz.zone)) {
                 free(tz.zone);
                 tz.zone = NULL;
         }
 
-        verify_timezone();
-
         tz.local_rtc = hwclock_is_localtime() > 0;
 
         return 0;
@@ -237,34 +191,22 @@ have_timezone:
 
 static int write_data_timezone(void) {
         int r = 0;
-        char *p;
-        struct stat st;
+        _cleanup_free_ char *p = NULL;
 
         if (!tz.zone) {
-                if (unlink("/etc/timezone") < 0 && errno != ENOENT)
-                        r = -errno;
-
                 if (unlink("/etc/localtime") < 0 && errno != ENOENT)
                         r = -errno;
 
                 return r;
         }
 
-        p = strappend(ZONEINFO_PATH, tz.zone);
+        p = strappend("../usr/share/zoneinfo/", tz.zone);
         if (!p)
                 return log_oom();
 
-        r = symlink(p, "/etc/localtime");
-        free(p);
-
+        r = symlink_atomic(p, "/etc/localtime");
         if (r < 0)
-                return -errno;
-
-        if (stat("/etc/timezone", &st) == 0 && S_ISREG(st.st_mode)) {
-                r = write_one_line_file_atomic("/etc/timezone", tz.zone);
-                if (r < 0)
-                        return r;
-        }
+                return r;
 
         return 0;
 }
@@ -329,8 +271,8 @@ static int write_data_local_rtc(void) {
                         return 0;
                 }
         }
-
-        r = write_one_line_file_atomic("/etc/adjtime", w);
+        label_init("/etc");
+        r = write_one_line_file_atomic_label("/etc/adjtime", w);
         free(w);
 
         return r;
@@ -340,7 +282,7 @@ static char** get_ntp_services(void) {
         char **r = NULL, **files, **i;
         int k;
 
-        k = conf_files_list(&files, ".list",
+        k = conf_files_list(&files, ".list", NULL,
                             "/etc/systemd/ntp-units.d",
                             "/run/systemd/ntp-units.d",
                             "/usr/local/lib/systemd/ntp-units.d",
@@ -722,13 +664,13 @@ static DBusHandlerResult timedate_message_handler(
                                 return bus_send_error_reply(connection, message, NULL, r);
                         }
 
+                        /* 2. Tell the kernel our time zone */
+                        hwclock_set_timezone(NULL);
+
                         if (tz.local_rtc) {
                                 struct timespec ts;
                                 struct tm *tm;
 
-                                /* 2. Teach kernel new timezone */
-                                hwclock_apply_localtime_delta(NULL);
-
                                 /* 3. Sync RTC from system clock, with the new delta */
                                 assert_se(clock_gettime(CLOCK_REALTIME, &ts) == 0);
                                 assert_se(tm = localtime(&ts.tv_sec));
@@ -736,7 +678,7 @@ static DBusHandlerResult timedate_message_handler(
                         }
 
                         log_struct(LOG_INFO,
-                                   "MESSAGE_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(SD_MESSAGE_TIMEZONE_CHANGE),
+                                   MESSAGE_ID(SD_MESSAGE_TIMEZONE_CHANGE),
                                    "TIMEZONE=%s", tz.zone,
                                    "MESSAGE=Changed timezone to '%s'.", tz.zone,
                                    NULL);
@@ -779,11 +721,8 @@ static DBusHandlerResult timedate_message_handler(
                                 return bus_send_error_reply(connection, message, NULL, r);
                         }
 
-                        /* 2. Teach kernel new timezone */
-                        if (tz.local_rtc)
-                                hwclock_apply_localtime_delta(NULL);
-                        else
-                                hwclock_reset_localtime_delta();
+                        /* 2. Tell the kernel our time zone */
+                        hwclock_set_timezone(NULL);
 
                         /* 3. Synchronize clocks */
                         assert_se(clock_gettime(CLOCK_REALTIME, &ts) == 0);
@@ -881,7 +820,7 @@ static DBusHandlerResult timedate_message_handler(
                         hwclock_set_time(tm);
 
                         log_struct(LOG_INFO,
-                                   "MESSAGE_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(SD_MESSAGE_TIME_CHANGE),
+                                   MESSAGE_ID(SD_MESSAGE_TIME_CHANGE),
                                    "REALTIME=%llu", (unsigned long long) timespec_load(&ts),
                                    "MESSAGE=Changed local time to %s", ctime(&ts.tv_sec),
                                    NULL);
@@ -974,7 +913,7 @@ static int connect_bus(DBusConnection **_bus) {
         if (!bus) {
                 log_error("Failed to get system D-Bus connection: %s", bus_error_message(&error));
                 r = -ECONNREFUSED;
-                goto fail;
+                goto fail2;
         }
 
         dbus_connection_set_exit_on_disconnect(bus, FALSE);
@@ -1006,7 +945,7 @@ static int connect_bus(DBusConnection **_bus) {
 fail:
         dbus_connection_close(bus);
         dbus_connection_unref(bus);
-
+fail2:
         dbus_error_free(&error);
 
         return r;
@@ -1061,7 +1000,7 @@ int main(int argc, char *argv[]) {
 
                 if (!exiting && remain_until < now(CLOCK_MONOTONIC)) {
                         exiting = true;
-                        bus_async_unregister_and_exit(bus, "org.freedesktop.hostname1");
+                        bus_async_unregister_and_exit(bus, "org.freedesktop.timedated1");
                 }
         }