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glibc  2.9
Defines | Functions | Variables
tst-signal1.c File Reference
#include <errno.h>
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.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 void receiver (void)
static int do_test (void)

Variables

static sigset_t ss
static pthread_barrier_t * b

Define Documentation

#define TEST_FUNCTION   do_test ()

Definition at line 188 of file tst-signal1.c.


Function Documentation

static int do_test ( void  ) [static]

Definition at line 95 of file tst-signal1.c.

{
  char tmp[] = "/tmp/tst-signal1-XXXXXX";

  int fd = mkstemp (tmp);
  if (fd == -1)
    {
      puts ("mkstemp failed");
      exit (1);
    }

  unlink (tmp);

  int i;
  for (i = 0; i < 20; ++i)
    write (fd, "foobar xyzzy", 12);

  b = mmap (NULL, sizeof (pthread_barrier_t), PROT_READ | PROT_WRITE,
           MAP_SHARED, fd, 0);
  if (b == MAP_FAILED)
    {
      puts ("mmap failed");
      exit (1);
    }

  pthread_barrierattr_t ba;
  if (pthread_barrierattr_init (&ba) != 0)
    {
      puts ("barrierattr_init failed");
      exit (1);
    }

  if (pthread_barrierattr_setpshared (&ba, PTHREAD_PROCESS_SHARED) != 0)
    {
      puts ("barrierattr_setpshared failed");
      exit (1);
    }

  if (pthread_barrier_init (b, &ba, 2) != 0)
    {
      puts ("barrier_init failed");
      exit (1);
    }

  if (pthread_barrierattr_destroy (&ba) != 0)
    {
      puts ("barrierattr_destroy failed");
      exit (1);
    }

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

  if (pid == 0)
    receiver ();

  pthread_barrier_wait (b);

  /* Wait a bit more.  */
  struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
  nanosleep (&ts, NULL);

  /* Send the signal.  */
  puts ("sending the signal now");
  kill (pid, SIGINT);

  /* Wait for the process to terminate.  */
  int status;
  if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
    {
      puts ("wrong child reported terminated");
      exit (1);
    }

  if (!WIFSIGNALED (status))
    {
      puts ("child wasn't signalled");
      exit (1);
    }

  if (WTERMSIG (status) != SIGINT)
    {
      puts ("child not terminated with SIGINT");
      exit (1);
    }

  return 0;
}

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static void receiver ( void  ) [static]

Definition at line 63 of file tst-signal1.c.

{
  pthread_t th;

  /* Make sure the process doesn't run forever.  */
  alarm (10);

  sigfillset (&ss);

  if (pthread_sigmask (SIG_SETMASK, &ss, NULL) != 0)
    {
      puts ("1st pthread_sigmask failed");
      exit (1);
    }

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

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

  _exit (0);
}

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

Definition at line 36 of file tst-signal1.c.

{
  sigdelset (&ss, SIGINT);

  if (pthread_sigmask (SIG_SETMASK, &ss, NULL) != 0)
    {
      puts ("2nd pthread_sigmask failed");
      exit (1);
    }

  pthread_barrier_wait (b);

  int sig;
  int res = sigwait (&ss, &sig);
  if (res == 0)
    {
      printf ("sigwait returned successfully with signal %d\n", sig);
      exit (1);
    }

  printf ("sigwait returned with %s (%d)\n", strerror (res), res);

  return NULL;
}

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Variable Documentation

pthread_barrier_t* b [static]

Definition at line 32 of file tst-signal1.c.

sigset_t ss [static]

Definition at line 31 of file tst-signal1.c.