/*
* Please, don't add this file to libcommon because clock_gettime() requires
* -lrt on systems with old libc.
*/
#include <time.h>
#include <signal.h>
#include <sys/sysinfo.h>
#include <sys/time.h>
#include "c.h"
#include "nls.h"
#include "monotonic.h"
int get_boot_time(struct timeval *boot_time)
{
#ifdef CLOCK_BOOTTIME
struct timespec hires_uptime;
struct timeval lores_uptime;
#endif
struct timeval now;
#ifdef HAVE_SYSINFO
struct sysinfo info;
#endif
if (gettimeofday(&now, NULL) != 0) {
warn(_("gettimeofday failed"));
return -errno;
}
#ifdef CLOCK_BOOTTIME
if (clock_gettime(CLOCK_BOOTTIME, &hires_uptime) == 0) {
TIMESPEC_TO_TIMEVAL(&lores_uptime, &hires_uptime);
timersub(&now, &lores_uptime, boot_time);
return 0;
}
#endif
#ifdef HAVE_SYSINFO
/* fallback */
if (sysinfo(&info) != 0)
warn(_("sysinfo failed"));
boot_time->tv_sec = now.tv_sec - info.uptime;
boot_time->tv_usec = 0;
return 0;
#else
return -ENOSYS;
#endif
}
int gettime_monotonic(struct timeval *tv)
{
#ifdef CLOCK_MONOTONIC
/* Can slew only by ntp and adjtime */
int ret;
struct timespec ts;
# ifdef CLOCK_MONOTONIC_RAW
/* Linux specific, cant slew */
if (!(ret = clock_gettime(CLOCK_MONOTONIC_RAW, &ts))) {
# else
if (!(ret = clock_gettime(CLOCK_MONOTONIC, &ts))) {
# endif
tv->tv_sec = ts.tv_sec;
tv->tv_usec = ts.tv_nsec / 1000;
}
return ret;
#else
return gettimeofday(tv, NULL);
#endif
}
int setup_timer(timer_t * t_id, struct itimerval *timeout,
void (*timeout_handler)(void))
{
struct sigaction sig_a;
static struct sigevent sig_e = {
.sigev_notify = SIGEV_SIGNAL,
.sigev_signo = SIGALRM
};
struct itimerspec val = {
.it_value.tv_sec = timeout->it_value.tv_sec,
.it_value.tv_nsec = timeout->it_value.tv_usec * 1000,
.it_interval.tv_sec = 0,
.it_interval.tv_nsec = 0
};
if (sigemptyset(&sig_a.sa_mask))
return 1;
sig_a.sa_flags = SA_SIGINFO;
sig_a.sa_handler = timeout_handler;
if (sigaction(SIGALRM, &sig_a, 0))
return 1;
if (timer_create(CLOCK_MONOTONIC, &sig_e, t_id))
return 1;
if (timer_settime(*t_id, SA_SIGINFO, &val, NULL))
return 1;
return 0;
}
void cancel_timer(timer_t *t_id)
{
timer_delete(*t_id);
}