1  /* Check for failure paths handling for cancellation points.
       2     Copyright (C) 2015-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <errno.h>
      20  #include <pthread.h>
      21  #include <stdio.h>
      22  #include <stdlib.h>
      23  #include <string.h>
      24  #include <unistd.h>
      25  
      26  /* Check that the cancel syscall points handles both the errno and return code
      27     correctly for invalid arguments.  */
      28  static void *
      29  tf (void *arg)
      30  {
      31  #ifdef SET_CANCEL_DISABLE
      32    pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, NULL);
      33  #endif
      34  
      35    /* This is a cancellation point, but we should not be cancelled.  */
      36    int r = write (-1, 0, 0);
      37  
      38    if (r != -1 || errno != EBADF)
      39      {
      40        printf ("error: write returned %d, errno %d\n", r, errno);
      41        exit (1);
      42      }
      43  
      44    return NULL;
      45  }
      46  
      47  static int
      48  do_test (void)
      49  {
      50    pthread_t th;
      51  
      52    if (pthread_create (&th, NULL, tf, NULL) != 0)
      53      {
      54        puts ("error: pthread_create failed");
      55        exit (1);
      56      }
      57  
      58    if (pthread_join (th, NULL) != 0)
      59      {
      60        puts ("error: pthread_join failed");
      61        exit (1);
      62      }
      63  
      64    return 0;
      65  }
      66  
      67  #define TEST_FUNCTION do_test ()
      68  #include "../test-skeleton.c"