nptl/tst-exec4.c

   1 /* Signal handler and mask set in thread which calls exec.
   2    Copyright (C) 2003-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <pthread.h>
  21 #include <signal.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25
  26
  27 static void *
  28 tf (void *arg)
  29 {
  30   /* Ignore SIGUSR1 and block SIGUSR2.  */
  31   if (sigignore (SIGUSR1) != 0)
  32     {
  33       puts ("sigignore failed");
  34       exit (1);
  35     }
  36
  37   sigset_t ss;
  38   sigemptyset (&ss);
  39   sigaddset (&ss, SIGUSR2);
  40   if (pthread_sigmask (SIG_BLOCK, &ss, NULL) != 0)
  41     {
  42       puts ("1st run: sigmask failed");
  43       exit (1);
  44     }
  45
  46   char **oldargv = (char **) arg;
  47   size_t n = 1;
  48   while (oldargv[n] != NULL)
  49     ++n;
  50
  51   char **argv = (char **) alloca ((n + 1) * sizeof (char *));
  52   for (n = 0; oldargv[n + 1] != NULL; ++n)
  53     argv[n] = oldargv[n + 1];
  54   argv[n++] = (char *) "--direct";
  55   argv[n] = NULL;
  56
  57   execv (argv[0], argv);
  58
  59   puts ("execv failed");
  60
  61   exit (1);
  62 }
  63
  64
  65 static int
  66 do_test (int argc, char *argv[])
  67 {
  68   if (argc == 1)
  69     {
  70       /* This is the second call.  Perform the test.  */
  71       struct sigaction sa;
  72
  73       if (sigaction (SIGUSR1, NULL, &sa) != 0)
  74         {
  75           puts ("2nd run: sigaction failed");
  76           return 1;
  77         }
  78       if (sa.sa_handler != SIG_IGN)
  79         {
  80           puts ("SIGUSR1 not ignored");
  81           return 1;
  82         }
  83
  84       sigset_t ss;
  85       if (pthread_sigmask (SIG_SETMASK, NULL, &ss) != 0)
  86         {
  87           puts ("2nd run: sigmask failed");
  88           return 1;
  89         }
  90       if (! sigismember (&ss, SIGUSR2))
  91         {
  92           puts ("SIGUSR2 not blocked");
  93           return 1;
  94         }
  95
  96       return 0;
  97     }
  98
  99   pthread_t th;
 100   if (pthread_create (&th, NULL, tf, argv) != 0)
 101     {
 102       puts ("create failed");
 103       exit (1);
 104     }
 105
 106   /* This call should never return.  */
 107   pthread_join (th, NULL);
 108
 109   puts ("join returned");
 110
 111   return 1;
 112 }
 113
 114 #define TEST_FUNCTION do_test (argc, argv)
 115 #include "../test-skeleton.c"