-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2010-2012 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 <fcntl.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <time.h>
#include <linux/rtc.h>
#include <stdio.h>
#include <sys/ioctl.h>
return 0;
}
-int clock_is_localtime(void) {
+int clock_is_localtime(const char* adjtime_path) {
_cleanup_fclose_ FILE *f;
+ if (!adjtime_path)
+ adjtime_path = "/etc/adjtime";
+
/*
* The third line of adjtime is "UTC" or "LOCAL" or nothing.
* # /etc/adjtime
* 0
* UTC
*/
- f = fopen("/etc/adjtime", "re");
+ f = fopen(adjtime_path, "re");
if (f) {
char line[LINE_MAX];
bool b;
fgets(line, sizeof(line), f) &&
fgets(line, sizeof(line), f);
if (!b)
- return -EIO;
+ /* less than three lines -> default to UTC */
+ return 0;
truncate_nl(line);
return streq(line, "LOCAL");
} else if (errno != ENOENT)
return -errno;
+ /* adjtime not present -> default to UTC */
return 0;
}
* have read from the RTC.
*/
if (settimeofday(tv_null, &tz) < 0)
- return -errno;
+ return negative_errno();
+
if (min)
*min = minutesdelta;
return 0;
return 0;
}
+
+#define TIME_EPOCH_USEC ((usec_t) TIME_EPOCH * USEC_PER_SEC)
+
+int clock_apply_epoch(void) {
+ struct timespec ts;
+
+ if (now(CLOCK_REALTIME) >= TIME_EPOCH_USEC)
+ return 0;
+
+ if (clock_settime(CLOCK_REALTIME, timespec_store(&ts, TIME_EPOCH_USEC)) < 0)
+ return -errno;
+
+ return 1;
+}