nsz Git - musl/blob - src/linux/wait4.c

   1 #include <sys/wait.h>
   2 #include <sys/resource.h>
   3 #include <string.h>
   4 #include "syscall.h"
   5
   6 pid_t wait4(pid_t pid, int *status, int options, struct rusage *usage)
   7 {
   8         pid_t ret = syscall4(__NR_wait4, pid, (long)status, options, (long)usage);
   9         /* Fixup kernel time_t... */
  10         if (usage) {
  11                 long kusage[4];
  12                 memcpy(kusage, usage, sizeof kusage);
  13                 memmove((struct timeval *)usage + 2, (long *)usage + 4, sizeof *usage - 2*sizeof(struct timeval));
  14                 usage->ru_utime = (struct timeval){ kusage[0], kusage[1] };
  15                 usage->ru_stime = (struct timeval){ kusage[2], kusage[3] };
  16         }
  17         return ret;
  18 }