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implement settimeofday in terms of clock_settime, not old syscall 

this is yet another place where special handling of time syscalls can
and should be avoided by implementing legacy functions in terms of
their modern replacements. in theory a fallback to SYS_settimeofday
could be added to clock_settime, but SYS_clock_settime has been
available since Linux 2.6.0 or earlier, i.e. all the way back to the
minimum supported version.
This commit is contained in:
Rich Felker 2019-07-27 17:48:32 -04:00
parent 4bbd7baea7
commit 2c2c3605d3
1 changed files with 6 additions and 1 deletions
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7
src/linux/settimeofday.c
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@ -1,8 +1,13 @@
#define _BSD_SOURCE
#include <sys/time.h>
#include <time.h>
#include <errno.h>
#include "syscall.h"
int settimeofday(const struct timeval *tv, const struct timezone *tz)
{
return syscall(SYS_settimeofday, tv, 0);
if (!tv) return 0;
if (tv->tv_usec >= 1000000ULL) return __syscall_ret(-EINVAL);
return clock_settime(CLOCK_REALTIME, &((struct timespec){
.tv_sec = tv->tv_sec, .tv_nsec = tv->tv_usec * 1000}));
}