src/regression/pthread_atfork-errno-clobber.c

   1 #include <errno.h>
   2 #include <pthread.h>
   3 #include <stdio.h>
   4 #include <unistd.h>
   5 #include <sys/resource.h>
   6 #include <sys/types.h>
   7 #include <sys/wait.h>
   8 #include "test.h"
   9
  10 #define TEST(c, ...) ((c) ? 1 : (t_error(#c" failed: " __VA_ARGS__),0))
  11
  12 static void handler_errno(void)
  13 {
  14         errno = 0;
  15 }
  16
  17 int main(void)
  18 {
  19         t_setrlim(RLIMIT_NPROC, 0);
  20         pthread_atfork(handler_errno, handler_errno, handler_errno);
  21
  22         pid_t pid;
  23         if (!TEST((pid = fork()) == -1, "fork succeeded despite rlimit\n")) {
  24                 if (!pid) _exit(0);
  25                 while (waitpid(pid, NULL, 0)<0 && errno==EINTR);
  26         } else {
  27                 TEST(errno != 0, "fork failed but errno was clobbered\n");
  28         }
  29
  30         return t_status;
  31 }
  32