sys_time_h.c

#define _XOPEN_SOURCE 600
#include <sys/time.h>

int main() {
  struct itimerval i1 = {{1, 100}, {2, 200}};
  int res = setitimer(ITIMER_REAL, &i1, 0);
  //@ assert res == 0;
  struct itimerval i2;
  res = setitimer(ITIMER_REAL, &i1, &i2);
  //@ assert res == 0;
  //@ assert \initialized(&i2);
  res = getitimer(ITIMER_REAL, &i2);
  //@ assert res == 0;
  //@ assert \initialized(&i2);
  int INVALID_ITIMER = -1;
  res = getitimer(INVALID_ITIMER, &i2);
  //@ assert res == -1;
  i2.it_interval.tv_usec = 1000000; // invalid tv_usec
  res = setitimer(ITIMER_VIRTUAL, &i2, &i1);
  //@ assert res == -1;

  int r1 = utimes("/tmp/utimes", 0);
  struct timeval tv[2] =
    {
     { .tv_sec = 10000000, .tv_usec = 999999 },
     { .tv_sec = -9000000, .tv_usec = 1 },
    };
  int r2 = utimes("/tmp/utimes", tv);

  return 0;
}