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timedate: expose RTC time

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Since access to the RTC is privileged expose the current RTC time as bus
property so that unprivileged clients can read it.
This commit is contained in:
Lennart Poettering 2013-10-16 16:57:49 +02:00
parent d16dd6d42a
commit 6fc60278a9
1 changed files with 31 additions and 1 deletions
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32
src/timedate/timedated.c
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@ -452,6 +452,35 @@ static int context_enable_ntp(Context*c, sd_bus *bus, sd_bus_error *error) {
return -ENOTSUP;
}
static int property_get_rtc_time(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
sd_bus_error *error,
void *userdata) {
struct tm tm;
usec_t t;
int r;
zero(tm);
r = hwclock_get_time(&tm);
if (r < 0) {
sd_bus_error_set_errnof(error, -r, "Failed to read RTC: %s", strerror(-r));
return r;
}
t = (usec_t) mktime(&tm) * USEC_PER_SEC;
r = sd_bus_message_append(reply, "t", t);
if (r < 0)
return r;
return 1;
}
static int method_set_timezone(sd_bus *bus, sd_bus_message *m, void *userdata) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
Context *c = userdata;
@ -474,7 +503,7 @@ static int method_set_timezone(sd_bus *bus, sd_bus_message *m, void *userdata) {
if (r < 0)
return sd_bus_reply_method_errno(bus, m, r, &error);
if (r == 0)
return 1;
return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
t = strdup(z);
if (!t)
@ -706,6 +735,7 @@ static const sd_bus_vtable timedate_vtable[] = {
SD_BUS_PROPERTY("LocalRTC", "b", NULL, offsetof(Context, local_rtc), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("CanNTP", "b", bus_property_get_tristate, offsetof(Context, can_ntp), 0),
SD_BUS_PROPERTY("NTP", "b", bus_property_get_tristate, offsetof(Context, use_ntp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("RTCTimeUSec", "t", property_get_rtc_time, 0, 0),
SD_BUS_METHOD("SetTime", "xbb", NULL, method_set_time, 0),
SD_BUS_METHOD("SetTimezone", "sb", NULL, method_set_timezone, 0),
SD_BUS_METHOD("SetLocalRTC", "bbb", NULL, method_set_local_rtc, 0),