nsz Git - musl/blob - src/process/fork.c

   1 #include <unistd.h>
   2 #include <string.h>
   3 #include "syscall.h"
   4 #include "libc.h"
   5 #include "pthread_impl.h"
   6
   7 static void dummy(int x)
   8 {
   9 }
  10
  11 weak_alias(dummy, __fork_handler);
  12
  13 pid_t fork(void)
  14 {
  15         pid_t ret;
  16         __fork_handler(-1);
  17         ret = syscall(SYS_fork);
  18         if (libc.main_thread && !ret) {
  19                 pthread_t self = __pthread_self();
  20                 self->tid = self->pid = syscall(SYS_getpid);
  21                 memset(&self->robust_list, 0, sizeof self->robust_list);
  22                 libc.threads_minus_1 = 0;
  23                 libc.main_thread = self;
  24         }
  25         __fork_handler(!ret);
  26         return ret;
  27 }