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#include <time.h>
#include <sys/sysinfo.h>
#include <sys/time.h>
#include "c.h"
#include "nls.h"
#include "boottime.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
}
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