1  #include <errno.h>
       2  #include <pthread.h>
       3  #include <stdio.h>
       4  #include <stdlib.h>
       5  #include <string.h>
       6  #include <unistd.h>
       7  #include <sys/wait.h>
       8  
       9  
      10  static pid_t pid;
      11  
      12  static void *
      13  pid_thread (void *arg)
      14  {
      15    if (pid != getpid ())
      16      {
      17        printf ("pid wrong in thread: should be %d, is %d\n",
      18  	      (int) pid, (int) getpid ());
      19        return (void *) 1L;
      20      }
      21  
      22    return NULL;
      23  }
      24  
      25  static int
      26  do_test (void)
      27  {
      28    pid = getpid ();
      29  
      30    pthread_t thr;
      31    int ret = pthread_create (&thr, NULL, pid_thread, NULL);
      32    if (ret)
      33      {
      34        printf ("pthread_create failed: %d\n", ret);
      35        return 1;
      36      }
      37  
      38    void *thr_ret;
      39    ret = pthread_join (thr, &thr_ret);
      40    if (ret)
      41      {
      42        printf ("pthread_create failed: %d\n", ret);
      43        return 1;
      44      }
      45    else if (thr_ret)
      46      {
      47        printf ("thread getpid failed\n");
      48        return 1;
      49      }
      50  
      51    pid_t child = fork ();
      52    if (child == -1)
      53      {
      54        printf ("fork failed: %m\n");
      55        return 1;
      56      }
      57    else if (child == 0)
      58      {
      59        if (pid == getpid ())
      60  	{
      61  	  puts ("pid did not change after fork");
      62  	  exit (1);
      63  	}
      64  
      65        pid = getpid ();
      66        ret = pthread_create (&thr, NULL, pid_thread, NULL);
      67        if (ret)
      68  	{
      69  	  printf ("pthread_create failed: %d\n", ret);
      70  	  return 1;
      71  	}
      72  
      73        ret = pthread_join (thr, &thr_ret);
      74        if (ret)
      75  	{
      76  	  printf ("pthread_create failed: %d\n", ret);
      77  	  return 1;
      78  	}
      79        else if (thr_ret)
      80  	{
      81  	  printf ("thread getpid failed\n");
      82  	  return 1;
      83  	}
      84  
      85        return 0;
      86      }
      87  
      88    int status;
      89    if (TEMP_FAILURE_RETRY (waitpid (child, &status, 0)) != child)
      90      {
      91        puts ("waitpid failed");
      92        kill (child, SIGKILL);
      93        return 1;
      94      }
      95  
      96    if (!WIFEXITED (status))
      97      {
      98        if (WIFSIGNALED (status))
      99  	printf ("died from signal %s\n", strsignal (WTERMSIG (status)));
     100        else
     101  	puts ("did not terminate correctly");
     102        return 1;
     103      }
     104    if (WEXITSTATUS (status) != 0)
     105      {
     106        printf ("exit code %d\n", WEXITSTATUS (status));
     107        return 1;
     108      }
     109  
     110    return 0;
     111  }
     112  
     113  #define TEST_FUNCTION do_test ()
     114  #include "../test-skeleton.c"