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timedatectl: many fixes

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- print runtime warnings with log_warning()

- save and restore $TZ properly

- Get rid of exit() pseudo error handling

- Using time() is OK when connecting to a local container or when
  showing data about local host, but certainly not for remote hosts.
This commit is contained in:
Lennart Poettering 2015-04-02 12:15:53 +02:00
parent c4f5472117
commit d95a74ed11
1 changed files with 23 additions and 14 deletions
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37
src/timedate/timedatectl.c
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@ -77,31 +77,30 @@ static void print_status_info(const StatusInfo *i) {
struct tm tm;
time_t sec;
bool have_time = false;
const char *old_tz = NULL, *tz;
int r;
assert(i);
/* Enforce the values of /etc/localtime */
if (getenv("TZ")) {
fprintf(stderr, "Warning: Ignoring the TZ variable.\n\n");
unsetenv("TZ");
}
/* Save the old $TZ */
tz = getenv("TZ");
if (tz)
old_tz = strdupa(tz);
r = setenv("TZ", i->timezone, false);
if (r < 0) {
log_error_errno(errno, "Failed to set TZ environment variable: %m");
exit(EXIT_FAILURE);
}
tzset();
/* Set the new $TZ */
if (setenv("TZ", i->timezone, true) < 0)
log_warning_errno(errno, "Failed to set TZ environment variable, ignoring: %m");
else
tzset();
if (i->time != 0) {
sec = (time_t) (i->time / USEC_PER_SEC);
have_time = true;
} else if (IN_SET(arg_transport, BUS_TRANSPORT_REMOTE, BUS_TRANSPORT_MACHINE)) {
} else if (IN_SET(arg_transport, BUS_TRANSPORT_LOCAL, BUS_TRANSPORT_MACHINE)) {
sec = time(NULL);
have_time = true;
} else
fprintf(stderr, "Warning: Could not get time from timedated and not operating locally.\n\n");
log_warning("Could not get time from timedated and not operating locally, ignoring.");
if (have_time) {
xstrftime(a, "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&sec, &tm));
@ -117,7 +116,7 @@ static void print_status_info(const StatusInfo *i) {
if (i->rtc_time > 0) {
time_t rtc_sec;
rtc_sec = (time_t)(i->rtc_time / USEC_PER_SEC);
rtc_sec = (time_t) (i->rtc_time / USEC_PER_SEC);
xstrftime(a, "%a %Y-%m-%d %H:%M:%S", gmtime_r(&rtc_sec, &tm));
printf(" RTC time: %.*s\n", (int) sizeof(a), a);
} else
@ -126,6 +125,16 @@ static void print_status_info(const StatusInfo *i) {
if (have_time)
xstrftime(a, "%Z, %z", localtime_r(&sec, &tm));
/* Restore the $TZ */
if (old_tz)
r = setenv("TZ", old_tz, true);
else
r = unsetenv("TZ");
if (r < 0)
log_warning_errno(errno, "Failed to set TZ environment variable, ignoring: %m");
else
tzset();
printf(" Time zone: %s (%.*s)\n"
" NTP enabled: %s\n"
"NTP synchronized: %s\n"