sysdeps/pthread/tst-fork4.c

   1 /* Test of fork updating child universe's pthread structures.
   2    Copyright (C) 2003-2023 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 <unistd.h>
  23 #include <sys/types.h>
  24 #include <sys/wait.h>
  25 #include <string.h>
  26
  27
  28 static int
  29 do_test (void)
  30 {
  31   pthread_t me = pthread_self ();
  32
  33   pid_t pid = fork ();
  34
  35   if (pid < 0)
  36     {
  37       printf ("fork: %m\n");
  38       return 1;
  39     }
  40
  41   if (pid == 0)
  42     {
  43       int err = pthread_kill (me, SIGTERM);
  44       printf ("pthread_kill returned: %s\n", strerror (err));
  45       return 3;
  46     }
  47
  48   int status;
  49   errno = 0;
  50   if (wait (&status) != pid)
  51     printf ("wait failed: %m\n");
  52   else if (WIFSIGNALED (status) && WTERMSIG (status) == SIGTERM)
  53     {
  54       printf ("child correctly died with SIGTERM\n");
  55       return 0;
  56     }
  57   else
  58     printf ("child died with bad status %#x\n", status);
  59
  60   return 1;
  61 }
  62
  63 #define TEST_FUNCTION do_test ()
  64 #include "../test-skeleton.c"