chiark / gitweb /
systemctl: try to reload daemon after enable/disable only when not running in a chroot
[elogind.git] / src / timedate / timedated.c
index 4be7c3a9973d4b671846cf27f1a7c8cca5ca4fbc..80c24eb62b029f67470ddd3f919f350711d15b44 100644 (file)
 #include <string.h>
 #include <unistd.h>
 
+#include "systemd/sd-id128.h"
+#include "systemd/sd-messages.h"
 #include "util.h"
 #include "strv.h"
 #include "dbus-common.h"
 #include "polkit.h"
 #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"
@@ -142,62 +148,42 @@ 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("/usr/share/zoneinfo/", tz.zone);
-        if (!p) {
-                log_error("Out of memory");
-                return;
-        }
-
-        j = read_full_file("/etc/localtime", &a, &l);
-        k = read_full_file(p, &b, &q);
-
-        free(p);
-
-        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;
+        _cleanup_free_ char *t = NULL;
 
         free_data();
 
-        r = read_one_line_file("/etc/timezone", &tz.zone);
+        r = readlink_malloc("/etc/localtime", &t);
         if (r < 0) {
-                if (r != -ENOENT)
-                        log_warning("Failed to read /etc/timezone: %s", strerror(-r));
+                if (r == -EINVAL)
+                        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 /etc/localtime: %s", strerror(-r));
+        } else {
+                const char *e;
 
-#ifdef TARGET_FEDORA
-                r = parse_env_file("/etc/sysconfig/clock", NEWLINE,
-                                   "ZONE", &tz.zone,
-                                   NULL);
+                e = path_startswith(t, "/usr/share/zoneinfo/");
+                if (!e)
+                        e = path_startswith(t, "../usr/share/zoneinfo/");
 
-                if (r < 0 && r != -ENOENT)
-                        log_warning("Failed to read /etc/sysconfig/clock: %s", strerror(-r));
-#endif
+                if (!e)
+                        log_warning("/etc/localtime should be a symbolic link to a timezone data file in /usr/share/zoneinfo/.");
+                else {
+                        tz.zone = strdup(e);
+                        if (!tz.zone)
+                                return log_oom();
+
+                        goto have_timezone;
+                }
         }
 
+have_timezone:
         if (isempty(tz.zone)) {
                 free(tz.zone);
                 tz.zone = NULL;
         }
 
-        verify_timezone();
-
         tz.local_rtc = hwclock_is_localtime() > 0;
 
         return 0;
@@ -205,31 +191,20 @@ static int read_data(void) {
 
 static int write_data_timezone(void) {
         int r = 0;
-        char *p;
+        _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("/usr/share/zoneinfo/", tz.zone);
-        if (!p) {
-                log_error("Out of memory");
-                return -ENOMEM;
-        }
-
-        r = symlink_or_copy_atomic(p, "/etc/localtime");
-        free(p);
-
-        if (r < 0)
-                return r;
+        p = strappend("../usr/share/zoneinfo/", tz.zone);
+        if (!p)
+                return log_oom();
 
-        r = write_one_line_file_atomic("/etc/timezone", tz.zone);
+        r = symlink_atomic(p, "/etc/localtime");
         if (r < 0)
                 return r;
 
@@ -296,50 +271,64 @@ 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;
 }
 
 static char** get_ntp_services(void) {
-        char **r = NULL;
-        FILE *f;
-
-        f = fopen(SYSTEMD_NTP_UNITS, "re");
-        if (!f)
+        char **r = NULL, **files, **i;
+        int k;
+
+        k = conf_files_list(&files, ".list", NULL,
+                            "/etc/systemd/ntp-units.d",
+                            "/run/systemd/ntp-units.d",
+                            "/usr/local/lib/systemd/ntp-units.d",
+                            "/usr/lib/systemd/ntp-units.d",
+                            NULL);
+        if (k < 0)
                 return NULL;
 
-        for (;;) {
-                char line[PATH_MAX], *l, **q;
+        STRV_FOREACH(i, files) {
+                FILE *f;
 
-                if (!fgets(line, sizeof(line), f)) {
+                f = fopen(*i, "re");
+                if (!f)
+                        continue;
 
-                        if (ferror(f))
-                                log_error("Failed to read NTP units file: %m");
+                for (;;) {
+                        char line[PATH_MAX], *l, **q;
 
-                        break;
-                }
+                        if (!fgets(line, sizeof(line), f)) {
 
-                l = strstrip(line);
-                if (l[0] == 0 || l[0] == '#')
-                        continue;
+                                if (ferror(f))
+                                        log_error("Failed to read NTP units file: %m");
 
+                                break;
+                        }
 
-                q = strv_append(r, l);
-                if (!q) {
-                        log_error("Out of memory");
-                        break;
+                        l = strstrip(line);
+                        if (l[0] == 0 || l[0] == '#')
+                                continue;
+
+                        q = strv_append(r, l);
+                        if (!q) {
+                                log_oom();
+                                break;
+                        }
+
+                        strv_free(r);
+                        r = q;
                 }
 
-                strv_free(r);
-                r = q;
+                fclose(f);
         }
 
-        fclose(f);
+        strv_free(files);
 
-        return r;
+        return strv_uniq(r);
 }
 
 static int read_ntp(DBusConnection *bus) {
@@ -364,16 +353,14 @@ static int read_ntp(DBusConnection *bus) {
                                 "org.freedesktop.systemd1.Manager",
                                 "GetUnitFileState");
                 if (!m) {
-                        log_error("Out of memory");
-                        r = -ENOMEM;
+                        r = log_oom();
                         goto finish;
                 }
 
                 if (!dbus_message_append_args(m,
                                               DBUS_TYPE_STRING, i,
                                               DBUS_TYPE_INVALID)) {
-                        log_error("Could not append arguments to message.");
-                        r = -ENOMEM;
+                        r = log_oom();
                         goto finish;
                 }
 
@@ -677,20 +664,24 @@ 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));
                                 hwclock_set_time(tm);
                         }
 
-                        log_info("Changed timezone to '%s'.", tz.zone);
+                        log_struct(LOG_INFO,
+                                   MESSAGE_ID(SD_MESSAGE_TIMEZONE_CHANGE),
+                                   "TIMEZONE=%s", tz.zone,
+                                   "MESSAGE=Changed timezone to '%s'.", tz.zone,
+                                   NULL);
 
                         changed = bus_properties_changed_new(
                                         "/org/freedesktop/timedate1",
@@ -730,11 +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);
@@ -831,7 +819,11 @@ static DBusHandlerResult timedate_message_handler(
 
                         hwclock_set_time(tm);
 
-                        log_info("Changed local time to %s", ctime(&ts.tv_sec));
+                        log_struct(LOG_INFO,
+                                   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);
                 }
         } else if (dbus_message_is_method_call(message, "org.freedesktop.timedate1", "SetNTP")) {
                 dbus_bool_t ntp;
@@ -921,15 +913,14 @@ 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);
 
         if (!dbus_connection_register_object_path(bus, "/org/freedesktop/timedate1", &timedate_vtable, NULL) ||
             !dbus_connection_add_filter(bus, bus_exit_idle_filter, &remain_until, NULL)) {
-                log_error("Not enough memory");
-                r = -ENOMEM;
+                r = log_oom();
                 goto fail;
         }
 
@@ -954,7 +945,7 @@ static int connect_bus(DBusConnection **_bus) {
 fail:
         dbus_connection_close(bus);
         dbus_connection_unref(bus);
-
+fail2:
         dbus_error_free(&error);
 
         return r;
@@ -1009,7 +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");
                 }
         }