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glibc  2.9
Defines | Functions
tst-exec3.c File Reference
#include <errno.h>
#include <paths.h>
#include <pthread.h>
#include <signal.h>
#include <spawn.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
#include "../test-skeleton.c"

Go to the source code of this file.

Defines

#define TEST_FUNCTION   do_test ()

Functions

static void * tf (void *arg)
static int do_test (void)

Define Documentation

#define TEST_FUNCTION   do_test ()

Definition at line 152 of file tst-exec3.c.


Function Documentation

static int do_test ( void  ) [static]

Definition at line 44 of file tst-exec3.c.

{
  int fd[2];
  if (pipe (fd) != 0)
    {
      puts ("pipe failed");
      exit (1);
    }

  /* Not interested in knowing when the pipe is closed.  */
  if (sigignore (SIGPIPE) != 0)
    {
      puts ("sigignore failed");
      exit (1);
    }

  pid_t pid = fork ();
  if (pid == -1)
    {
      puts ("fork failed");
      exit (1);
    }

  if (pid == 0)
    {
      /* Use the fd for stdout.  This is kind of ugly because it
        substitutes the fd of stdout but we know what we are doing
        here...  */
      if (dup2 (fd[1], STDOUT_FILENO) != STDOUT_FILENO)
       {
         puts ("dup2 failed");
         exit (1);
       }

      close (fd[0]);

      pthread_t th;
      if (pthread_create (&th, NULL, tf, NULL) != 0)
       {
         puts ("create failed");
         exit (1);
       }

      if (pthread_join (th, NULL) == 0)
       {
         puts ("join succeeded!?");
         exit (1);
       }

      puts ("join returned!?");
      exit (1);
    }

  close (fd[1]);

  char buf[200];
  ssize_t n;
  bool seen_pid = false;
  while (TEMP_FAILURE_RETRY ((n = read (fd[0], buf, sizeof (buf)))) > 0)
    {
      /* We only expect to read the PID.  */
      char *endp;
      long int rpid = strtol (buf, &endp, 10);

      if (*endp != '\n')
       {
         printf ("didn't parse whole line: \"%s\"\n", buf);
         exit (1);
       }
      if (endp == buf)
       {
         puts ("read empty line");
         exit (1);
       }

      if (rpid != pid)
       {
         printf ("found \"%s\", expected PID %ld\n", buf, (long int) pid);
         exit (1);
       }

      if (seen_pid)
       {
         puts ("found more than one PID line");
         exit (1);
       }
      seen_pid = true;
    }

  close (fd[0]);

  int status;
  int err = waitpid (pid, &status, 0);
  if (err != pid)
    {
      puts ("waitpid failed");
      exit (1);
    }

  if (!seen_pid)
    {
      puts ("didn't get PID");
      exit (1);
    }

  return 0;
}

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static void* tf ( void *  arg) [static]

Definition at line 34 of file tst-exec3.c.

{
  execl (_PATH_BSHELL, _PATH_BSHELL, "-c", "echo $$", NULL);

  puts ("execl failed");
  exit (1);
}

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