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

   1 #include <sys/wait.h>
   2 #include <sys/resource.h>
   3 #include <string.h>
   4 #define SYSCALL_STANDALONE
   5 #include "syscall.h"
   6
   7 pid_t wait4(pid_t pid, int *status, int options, struct rusage *usage)
   8 {
   9         pid_t ret = syscall4(__NR_wait4, pid, (long)status, options, (long)usage);
  10         /* Fixup kernel time_t... */
  11         if (usage) {
  12                 long kusage[4];
  13                 memcpy(kusage, usage, sizeof kusage);
  14                 memmove((struct timeval *)usage + 2, (long *)usage + 4, sizeof *usage - 2*sizeof(struct timeval));
  15                 usage->ru_utime = (struct timeval){ kusage[0], kusage[1] };
  16                 usage->ru_stime = (struct timeval){ kusage[2], kusage[3] };
  17         }
  18         return ret;
  19 }