diff options
Diffstat (limited to 'src/basic/clock-util.c')
| -rw-r--r-- | src/basic/clock-util.c | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/src/basic/clock-util.c b/src/basic/clock-util.c deleted file mode 100644 index 7fe8d35ea5..0000000000 --- a/src/basic/clock-util.c +++ /dev/null @@ -1,165 +0,0 @@ -/*** - 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> -#include <sys/time.h> - -#include "clock-util.h" -#include "fd-util.h" -#include "macro.h" -#include "string-util.h" -#include "util.h" - -int clock_get_hwclock(struct tm *tm) { - _cleanup_close_ int fd = -1; - - assert(tm); - - fd = open("/dev/rtc", O_RDONLY|O_CLOEXEC); - if (fd < 0) - return -errno; - - /* This leaves the timezone fields of struct tm - * uninitialized! */ - if (ioctl(fd, RTC_RD_TIME, tm) < 0) - return -errno; - - /* We don't know daylight saving, so we reset this in order not - * to confuse mktime(). */ - tm->tm_isdst = -1; - - return 0; -} - -int clock_set_hwclock(const struct tm *tm) { - _cleanup_close_ int fd = -1; - - assert(tm); - - fd = open("/dev/rtc", O_RDONLY|O_CLOEXEC); - if (fd < 0) - return -errno; - - if (ioctl(fd, RTC_SET_TIME, tm) < 0) - return -errno; - - return 0; -} - -int clock_is_localtime(const char* adjtime_path) { - _cleanup_fclose_ FILE *f; - - if (adjtime_path == NULL) - adjtime_path = "/etc/adjtime"; - - /* - * The third line of adjtime is "UTC" or "LOCAL" or nothing. - * # /etc/adjtime - * 0.0 0 0 - * 0 - * UTC - */ - f = fopen(adjtime_path, "re"); - if (f) { - char line[LINE_MAX]; - bool b; - - b = fgets(line, sizeof(line), f) && - fgets(line, sizeof(line), f) && - fgets(line, sizeof(line), f); - if (!b) - /* 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; -} - -int clock_set_timezone(int *min) { - const struct timeval *tv_null = NULL; - struct timespec ts; - struct tm *tm; - int minutesdelta; - struct timezone tz; - - assert_se(clock_gettime(CLOCK_REALTIME, &ts) == 0); - assert_se(tm = localtime(&ts.tv_sec)); - minutesdelta = tm->tm_gmtoff / 60; - - tz.tz_minuteswest = -minutesdelta; - tz.tz_dsttime = 0; /* DST_NONE */ - - /* - * If the RTC does not run in UTC but in local time, the very first - * call to settimeofday() will set the kernel's timezone and will warp the - * system clock, so that it runs in UTC instead of the local time we - * have read from the RTC. - */ - if (settimeofday(tv_null, &tz) < 0) - return negative_errno(); - - if (min) - *min = minutesdelta; - return 0; -} - -int clock_reset_timewarp(void) { - const struct timeval *tv_null = NULL; - struct timezone tz; - - tz.tz_minuteswest = 0; - tz.tz_dsttime = 0; /* DST_NONE */ - - /* - * The very first call to settimeofday() does time warp magic. Do a - * dummy call here, so the time warping is sealed and all later calls - * behave as expected. - */ - if (settimeofday(tv_null, &tz) < 0) - return -errno; - - 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; -} |