glibc/time/settimeofday.c

48 lines
1.5 KiB
C

/* Copyright (C) 1991-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library 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.
The GNU C Library 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 the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <time.h>
#include <sys/time.h>
/* Set the current time of day and timezone information.
This call is restricted to the super-user. */
int
__settimeofday (const struct timeval *tv, const struct timezone *tz)
{
if (__glibc_unlikely (tz != 0))
{
if (tv != 0)
{
__set_errno (EINVAL);
return -1;
}
return __settimezone (tz);
}
struct timespec ts;
TIMEVAL_TO_TIMESPEC (tv, &ts);
return __clock_settime (CLOCK_REALTIME, &ts);
}
#ifdef VERSION_settimeofday
weak_alias (__settimeofday, __settimeofday_w);
default_symbol_version (__settimeofday_w, settimeofday, VERSION_settimeofday);
#else
weak_alias (__settimeofday, settimeofday);
#endif