diff options
Diffstat (limited to 'src/timedate/timedated.c')
| -rw-r--r-- | src/timedate/timedated.c | 747 |
1 files changed, 0 insertions, 747 deletions
diff --git a/src/timedate/timedated.c b/src/timedate/timedated.c deleted file mode 100644 index 490929e93b..0000000000 --- a/src/timedate/timedated.c +++ /dev/null @@ -1,747 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2011 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <errno.h> -#include <string.h> -#include <unistd.h> - -#include "sd-bus.h" -#include "sd-event.h" -#include "sd-messages.h" - -#include "alloc-util.h" -#include "bus-common-errors.h" -#include "bus-error.h" -#include "bus-util.h" -#include "clock-util.h" -#include "def.h" -#include "fileio-label.h" -#include "fs-util.h" -#include "path-util.h" -#include "selinux-util.h" -#include "strv.h" -#include "user-util.h" -#include "util.h" - -#define NULL_ADJTIME_UTC "0.0 0 0\n0\nUTC\n" -#define NULL_ADJTIME_LOCAL "0.0 0 0\n0\nLOCAL\n" - -static BUS_ERROR_MAP_ELF_REGISTER const sd_bus_error_map timedated_errors[] = { - SD_BUS_ERROR_MAP("org.freedesktop.timedate1.NoNTPSupport", EOPNOTSUPP), - SD_BUS_ERROR_MAP_END -}; - -typedef struct Context { - char *zone; - bool local_rtc; - bool can_ntp; - bool use_ntp; - Hashmap *polkit_registry; -} Context; - -static void context_free(Context *c) { - assert(c); - - free(c->zone); - bus_verify_polkit_async_registry_free(c->polkit_registry); -} - -static int context_read_data(Context *c) { - _cleanup_free_ char *t = NULL; - int r; - - assert(c); - - r = get_timezone(&t); - if (r == -EINVAL) - log_warning_errno(r, "/etc/localtime should be a symbolic link to a time zone data file in /usr/share/zoneinfo/."); - else if (r < 0) - log_warning_errno(r, "Failed to get target of /etc/localtime: %m"); - - free(c->zone); - c->zone = t; - t = NULL; - - c->local_rtc = clock_is_localtime(NULL) > 0; - - return 0; -} - -static int context_write_data_timezone(Context *c) { - _cleanup_free_ char *p = NULL; - int r = 0; - - assert(c); - - if (isempty(c->zone)) { - if (unlink("/etc/localtime") < 0 && errno != ENOENT) - r = -errno; - - return r; - } - - p = strappend("../usr/share/zoneinfo/", c->zone); - if (!p) - return log_oom(); - - r = symlink_atomic(p, "/etc/localtime"); - if (r < 0) - return r; - - return 0; -} - -static int context_write_data_local_rtc(Context *c) { - int r; - _cleanup_free_ char *s = NULL, *w = NULL; - - assert(c); - - r = read_full_file("/etc/adjtime", &s, NULL); - if (r < 0) { - if (r != -ENOENT) - return r; - - if (!c->local_rtc) - return 0; - - w = strdup(NULL_ADJTIME_LOCAL); - if (!w) - return -ENOMEM; - } else { - char *p; - const char *e = "\n"; /* default if there is less than 3 lines */ - const char *prepend = ""; - size_t a, b; - - p = strchrnul(s, '\n'); - if (*p == '\0') - /* only one line, no \n terminator */ - prepend = "\n0\n"; - else if (p[1] == '\0') { - /* only one line, with \n terminator */ - ++p; - prepend = "0\n"; - } else { - p = strchr(p+1, '\n'); - if (!p) { - /* only two lines, no \n terminator */ - prepend = "\n"; - p = s + strlen(s); - } else { - char *end; - /* third line might have a \n terminator or not */ - p++; - end = strchr(p, '\n'); - /* if we actually have a fourth line, use that as suffix "e", otherwise the default \n */ - if (end) - e = end; - } - } - - a = p - s; - b = strlen(e); - - w = new(char, a + (c->local_rtc ? 5 : 3) + strlen(prepend) + b + 1); - if (!w) - return -ENOMEM; - - *(char*) mempcpy(stpcpy(stpcpy(mempcpy(w, s, a), prepend), c->local_rtc ? "LOCAL" : "UTC"), e, b) = 0; - - if (streq(w, NULL_ADJTIME_UTC)) { - if (unlink("/etc/adjtime") < 0) - if (errno != ENOENT) - return -errno; - - return 0; - } - } - - mac_selinux_init(); - return write_string_file_atomic_label("/etc/adjtime", w); -} - -static int context_read_ntp(Context *c, sd_bus *bus) { - _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; - _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; - const char *s; - int r; - - assert(c); - assert(bus); - - r = sd_bus_call_method( - bus, - "org.freedesktop.systemd1", - "/org/freedesktop/systemd1", - "org.freedesktop.systemd1.Manager", - "GetUnitFileState", - &error, - &reply, - "s", - "systemd-timesyncd.service"); - - if (r < 0) { - if (sd_bus_error_has_name(&error, SD_BUS_ERROR_FILE_NOT_FOUND) || - sd_bus_error_has_name(&error, "org.freedesktop.systemd1.LoadFailed") || - sd_bus_error_has_name(&error, "org.freedesktop.systemd1.NoSuchUnit")) - return 0; - - return r; - } - - r = sd_bus_message_read(reply, "s", &s); - if (r < 0) - return r; - - c->can_ntp = true; - c->use_ntp = STR_IN_SET(s, "enabled", "enabled-runtime"); - - return 0; -} - -static int context_start_ntp(sd_bus *bus, sd_bus_error *error, bool enabled) { - int r; - - assert(bus); - assert(error); - - r = sd_bus_call_method( - bus, - "org.freedesktop.systemd1", - "/org/freedesktop/systemd1", - "org.freedesktop.systemd1.Manager", - enabled ? "StartUnit" : "StopUnit", - error, - NULL, - "ss", - "systemd-timesyncd.service", - "replace"); - if (r < 0) { - if (sd_bus_error_has_name(error, SD_BUS_ERROR_FILE_NOT_FOUND) || - sd_bus_error_has_name(error, "org.freedesktop.systemd1.LoadFailed") || - sd_bus_error_has_name(error, "org.freedesktop.systemd1.NoSuchUnit")) - return sd_bus_error_set_const(error, "org.freedesktop.timedate1.NoNTPSupport", "NTP not supported."); - - return r; - } - - return 0; -} - -static int context_enable_ntp(sd_bus *bus, sd_bus_error *error, bool enabled) { - int r; - - assert(bus); - assert(error); - - if (enabled) - r = sd_bus_call_method( - bus, - "org.freedesktop.systemd1", - "/org/freedesktop/systemd1", - "org.freedesktop.systemd1.Manager", - "EnableUnitFiles", - error, - NULL, - "asbb", 1, - "systemd-timesyncd.service", - false, true); - else - r = sd_bus_call_method( - bus, - "org.freedesktop.systemd1", - "/org/freedesktop/systemd1", - "org.freedesktop.systemd1.Manager", - "DisableUnitFiles", - error, - NULL, - "asb", 1, - "systemd-timesyncd.service", - false); - - if (r < 0) { - if (sd_bus_error_has_name(error, SD_BUS_ERROR_FILE_NOT_FOUND)) - return sd_bus_error_set_const(error, "org.freedesktop.timedate1.NoNTPSupport", "NTP not supported."); - - return r; - } - - r = sd_bus_call_method( - bus, - "org.freedesktop.systemd1", - "/org/freedesktop/systemd1", - "org.freedesktop.systemd1.Manager", - "Reload", - error, - NULL, - NULL); - if (r < 0) - return r; - - return 0; -} - -static int property_get_rtc_time( - sd_bus *bus, - const char *path, - const char *interface, - const char *property, - sd_bus_message *reply, - void *userdata, - sd_bus_error *error) { - - struct tm tm; - usec_t t; - int r; - - zero(tm); - r = clock_get_hwclock(&tm); - if (r == -EBUSY) { - log_warning("/dev/rtc is busy. Is somebody keeping it open continuously? That's not a good idea... Returning a bogus RTC timestamp."); - t = 0; - } else if (r == -ENOENT) { - log_debug("/dev/rtc not found."); - t = 0; /* no RTC found */ - } else if (r < 0) - return sd_bus_error_set_errnof(error, r, "Failed to read RTC: %m"); - else - t = (usec_t) timegm(&tm) * USEC_PER_SEC; - - return sd_bus_message_append(reply, "t", t); -} - -static int property_get_time( - sd_bus *bus, - const char *path, - const char *interface, - const char *property, - sd_bus_message *reply, - void *userdata, - sd_bus_error *error) { - - return sd_bus_message_append(reply, "t", now(CLOCK_REALTIME)); -} - -static int property_get_ntp_sync( - sd_bus *bus, - const char *path, - const char *interface, - const char *property, - sd_bus_message *reply, - void *userdata, - sd_bus_error *error) { - - return sd_bus_message_append(reply, "b", ntp_synced()); -} - -static int method_set_timezone(sd_bus_message *m, void *userdata, sd_bus_error *error) { - Context *c = userdata; - const char *z; - int interactive; - char *t; - int r; - - assert(m); - assert(c); - - r = sd_bus_message_read(m, "sb", &z, &interactive); - if (r < 0) - return r; - - if (!timezone_is_valid(z)) - return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid time zone '%s'", z); - - if (streq_ptr(z, c->zone)) - return sd_bus_reply_method_return(m, NULL); - - r = bus_verify_polkit_async( - m, - CAP_SYS_TIME, - "org.freedesktop.timedate1.set-timezone", - NULL, - interactive, - UID_INVALID, - &c->polkit_registry, - error); - if (r < 0) - return r; - if (r == 0) - return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ - - t = strdup(z); - if (!t) - return -ENOMEM; - - free(c->zone); - c->zone = t; - - /* 1. Write new configuration file */ - r = context_write_data_timezone(c); - if (r < 0) { - log_error_errno(r, "Failed to set time zone: %m"); - return sd_bus_error_set_errnof(error, r, "Failed to set time zone: %m"); - } - - /* 2. Tell the kernel our timezone */ - clock_set_timezone(NULL); - - if (c->local_rtc) { - struct timespec ts; - struct tm *tm; - - /* 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)); - clock_set_hwclock(tm); - } - - log_struct(LOG_INFO, - LOG_MESSAGE_ID(SD_MESSAGE_TIMEZONE_CHANGE), - "TIMEZONE=%s", c->zone, - LOG_MESSAGE("Changed time zone to '%s'.", c->zone), - NULL); - - (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m), "/org/freedesktop/timedate1", "org.freedesktop.timedate1", "Timezone", NULL); - - return sd_bus_reply_method_return(m, NULL); -} - -static int method_set_local_rtc(sd_bus_message *m, void *userdata, sd_bus_error *error) { - int lrtc, fix_system, interactive; - Context *c = userdata; - struct timespec ts; - int r; - - assert(m); - assert(c); - - r = sd_bus_message_read(m, "bbb", &lrtc, &fix_system, &interactive); - if (r < 0) - return r; - - if (lrtc == c->local_rtc) - return sd_bus_reply_method_return(m, NULL); - - r = bus_verify_polkit_async( - m, - CAP_SYS_TIME, - "org.freedesktop.timedate1.set-local-rtc", - NULL, - interactive, - UID_INVALID, - &c->polkit_registry, - error); - if (r < 0) - return r; - if (r == 0) - return 1; - - c->local_rtc = lrtc; - - /* 1. Write new configuration file */ - r = context_write_data_local_rtc(c); - if (r < 0) { - log_error_errno(r, "Failed to set RTC to local/UTC: %m"); - return sd_bus_error_set_errnof(error, r, "Failed to set RTC to local/UTC: %m"); - } - - /* 2. Tell the kernel our timezone */ - clock_set_timezone(NULL); - - /* 3. Synchronize clocks */ - assert_se(clock_gettime(CLOCK_REALTIME, &ts) == 0); - - if (fix_system) { - struct tm tm; - - /* Sync system clock from RTC; first, - * initialize the timezone fields of - * struct tm. */ - if (c->local_rtc) - tm = *localtime(&ts.tv_sec); - else - tm = *gmtime(&ts.tv_sec); - - /* Override the main fields of - * struct tm, but not the timezone - * fields */ - if (clock_get_hwclock(&tm) >= 0) { - - /* And set the system clock - * with this */ - if (c->local_rtc) - ts.tv_sec = mktime(&tm); - else - ts.tv_sec = timegm(&tm); - - clock_settime(CLOCK_REALTIME, &ts); - } - - } else { - struct tm *tm; - - /* Sync RTC from system clock */ - if (c->local_rtc) - tm = localtime(&ts.tv_sec); - else - tm = gmtime(&ts.tv_sec); - - clock_set_hwclock(tm); - } - - log_info("RTC configured to %s time.", c->local_rtc ? "local" : "UTC"); - - (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m), "/org/freedesktop/timedate1", "org.freedesktop.timedate1", "LocalRTC", NULL); - - return sd_bus_reply_method_return(m, NULL); -} - -static int method_set_time(sd_bus_message *m, void *userdata, sd_bus_error *error) { - int relative, interactive; - Context *c = userdata; - int64_t utc; - struct timespec ts; - usec_t start; - struct tm* tm; - int r; - - assert(m); - assert(c); - - if (c->use_ntp) - return sd_bus_error_setf(error, BUS_ERROR_AUTOMATIC_TIME_SYNC_ENABLED, "Automatic time synchronization is enabled"); - - /* this only gets used if dbus does not provide a timestamp */ - start = now(CLOCK_MONOTONIC); - - r = sd_bus_message_read(m, "xbb", &utc, &relative, &interactive); - if (r < 0) - return r; - - if (!relative && utc <= 0) - return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid absolute time"); - - if (relative && utc == 0) - return sd_bus_reply_method_return(m, NULL); - - if (relative) { - usec_t n, x; - - n = now(CLOCK_REALTIME); - x = n + utc; - - if ((utc > 0 && x < n) || - (utc < 0 && x > n)) - return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Time value overflow"); - - timespec_store(&ts, x); - } else - timespec_store(&ts, (usec_t) utc); - - r = bus_verify_polkit_async( - m, - CAP_SYS_TIME, - "org.freedesktop.timedate1.set-time", - NULL, - interactive, - UID_INVALID, - &c->polkit_registry, - error); - if (r < 0) - return r; - if (r == 0) - return 1; - - /* adjust ts for time spent in program */ - r = sd_bus_message_get_monotonic_usec(m, &start); - /* when sd_bus_message_get_monotonic_usec() returns -ENODATA it does not modify &start */ - if (r < 0 && r != -ENODATA) - return r; - - timespec_store(&ts, timespec_load(&ts) + (now(CLOCK_MONOTONIC) - start)); - - /* Set system clock */ - if (clock_settime(CLOCK_REALTIME, &ts) < 0) { - log_error_errno(errno, "Failed to set local time: %m"); - return sd_bus_error_set_errnof(error, errno, "Failed to set local time: %m"); - } - - /* Sync down to RTC */ - if (c->local_rtc) - tm = localtime(&ts.tv_sec); - else - tm = gmtime(&ts.tv_sec); - clock_set_hwclock(tm); - - log_struct(LOG_INFO, - LOG_MESSAGE_ID(SD_MESSAGE_TIME_CHANGE), - "REALTIME="USEC_FMT, timespec_load(&ts), - LOG_MESSAGE("Changed local time to %s", ctime(&ts.tv_sec)), - NULL); - - return sd_bus_reply_method_return(m, NULL); -} - -static int method_set_ntp(sd_bus_message *m, void *userdata, sd_bus_error *error) { - int enabled, interactive; - Context *c = userdata; - int r; - - assert(m); - assert(c); - - r = sd_bus_message_read(m, "bb", &enabled, &interactive); - if (r < 0) - return r; - - if ((bool)enabled == c->use_ntp) - return sd_bus_reply_method_return(m, NULL); - - r = bus_verify_polkit_async( - m, - CAP_SYS_TIME, - "org.freedesktop.timedate1.set-ntp", - NULL, - interactive, - UID_INVALID, - &c->polkit_registry, - error); - if (r < 0) - return r; - if (r == 0) - return 1; - - r = context_enable_ntp(sd_bus_message_get_bus(m), error, enabled); - if (r < 0) - return r; - - r = context_start_ntp(sd_bus_message_get_bus(m), error, enabled); - if (r < 0) - return r; - - c->use_ntp = enabled; - log_info("Set NTP to %sd", enable_disable(enabled)); - - (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m), "/org/freedesktop/timedate1", "org.freedesktop.timedate1", "NTP", NULL); - - return sd_bus_reply_method_return(m, NULL); -} - -static const sd_bus_vtable timedate_vtable[] = { - SD_BUS_VTABLE_START(0), - SD_BUS_PROPERTY("Timezone", "s", NULL, offsetof(Context, zone), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), - SD_BUS_PROPERTY("LocalRTC", "b", bus_property_get_bool, offsetof(Context, local_rtc), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), - SD_BUS_PROPERTY("CanNTP", "b", bus_property_get_bool, offsetof(Context, can_ntp), 0), - SD_BUS_PROPERTY("NTP", "b", bus_property_get_bool, offsetof(Context, use_ntp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), - SD_BUS_PROPERTY("NTPSynchronized", "b", property_get_ntp_sync, 0, 0), - SD_BUS_PROPERTY("TimeUSec", "t", property_get_time, 0, 0), - SD_BUS_PROPERTY("RTCTimeUSec", "t", property_get_rtc_time, 0, 0), - SD_BUS_METHOD("SetTime", "xbb", NULL, method_set_time, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("SetTimezone", "sb", NULL, method_set_timezone, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("SetLocalRTC", "bbb", NULL, method_set_local_rtc, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("SetNTP", "bb", NULL, method_set_ntp, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_VTABLE_END, -}; - -static int connect_bus(Context *c, sd_event *event, sd_bus **_bus) { - _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; - int r; - - assert(c); - assert(event); - assert(_bus); - - r = sd_bus_default_system(&bus); - if (r < 0) - return log_error_errno(r, "Failed to get system bus connection: %m"); - - r = sd_bus_add_object_vtable(bus, NULL, "/org/freedesktop/timedate1", "org.freedesktop.timedate1", timedate_vtable, c); - if (r < 0) - return log_error_errno(r, "Failed to register object: %m"); - - r = sd_bus_request_name(bus, "org.freedesktop.timedate1", 0); - if (r < 0) - return log_error_errno(r, "Failed to register name: %m"); - - r = sd_bus_attach_event(bus, event, 0); - if (r < 0) - return log_error_errno(r, "Failed to attach bus to event loop: %m"); - - *_bus = bus; - bus = NULL; - - return 0; -} - -int main(int argc, char *argv[]) { - Context context = {}; - _cleanup_(sd_event_unrefp) sd_event *event = NULL; - _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; - int r; - - log_set_target(LOG_TARGET_AUTO); - log_parse_environment(); - log_open(); - - umask(0022); - - if (argc != 1) { - log_error("This program takes no arguments."); - r = -EINVAL; - goto finish; - } - - r = sd_event_default(&event); - if (r < 0) { - log_error_errno(r, "Failed to allocate event loop: %m"); - goto finish; - } - - sd_event_set_watchdog(event, true); - - r = connect_bus(&context, event, &bus); - if (r < 0) - goto finish; - - (void) sd_bus_negotiate_timestamp(bus, true); - - r = context_read_data(&context); - if (r < 0) { - log_error_errno(r, "Failed to read time zone data: %m"); - goto finish; - } - - r = context_read_ntp(&context, bus); - if (r < 0) { - log_error_errno(r, "Failed to determine whether NTP is enabled: %m"); - goto finish; - } - - r = bus_event_loop_with_idle(event, bus, "org.freedesktop.timedate1", DEFAULT_EXIT_USEC, NULL, NULL); - if (r < 0) { - log_error_errno(r, "Failed to run event loop: %m"); - goto finish; - } - -finish: - context_free(&context); - - return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; -} |