nptl/tst-exec4.c

   1 /* Signal handler and mask set in thread which calls exec.
   2    Copyright (C) 2003-2024 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 <pthread.h>
  20 #include <signal.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24 #include <support/xsignal.h>
  25
  26 static void *
  27 tf (void *arg)
  28 {
  29   /* Ignore SIGUSR1 and block SIGUSR2.  */
  30   xsignal (SIGUSR1, SIG_IGN);
  31
  32   sigset_t ss;
  33   sigemptyset (&ss);
  34   sigaddset (&ss, SIGUSR2);
  35   if (pthread_sigmask (SIG_BLOCK, &ss, NULL) != 0)
  36     {
  37       puts ("1st run: sigmask failed");
  38       exit (1);
  39     }
  40
  41   char **oldargv = (char **) arg;
  42   size_t n = 1;
  43   while (oldargv[n] != NULL)
  44     ++n;
  45
  46   char **argv = (char **) alloca ((n + 1) * sizeof (char *));
  47   for (n = 0; oldargv[n + 1] != NULL; ++n)
  48     argv[n] = oldargv[n + 1];
  49   argv[n++] = (char *) "--direct";
  50   argv[n] = NULL;
  51
  52   execv (argv[0], argv);
  53
  54   puts ("execv failed");
  55
  56   exit (1);
  57 }
  58
  59
  60 static int
  61 do_test (int argc, char *argv[])
  62 {
  63   if (argc == 1)
  64     {
  65       /* This is the second call.  Perform the test.  */
  66       struct sigaction sa;
  67
  68       if (sigaction (SIGUSR1, NULL, &sa) != 0)
  69         {
  70           puts ("2nd run: sigaction failed");
  71           return 1;
  72         }
  73       if (sa.sa_handler != SIG_IGN)
  74         {
  75           puts ("SIGUSR1 not ignored");
  76           return 1;
  77         }
  78
  79       sigset_t ss;
  80       if (pthread_sigmask (SIG_SETMASK, NULL, &ss) != 0)
  81         {
  82           puts ("2nd run: sigmask failed");
  83           return 1;
  84         }
  85       if (! sigismember (&ss, SIGUSR2))
  86         {
  87           puts ("SIGUSR2 not blocked");
  88           return 1;
  89         }
  90
  91       return 0;
  92     }
  93
  94   pthread_t th;
  95   if (pthread_create (&th, NULL, tf, argv) != 0)
  96     {
  97       puts ("create failed");
  98       exit (1);
  99     }
 100
 101   /* This call should never return.  */
 102   pthread_join (th, NULL);
 103
 104   puts ("join returned");
 105
 106   return 1;
 107 }
 108
 109 #define TEST_FUNCTION do_test (argc, argv)
 110 #include "../test-skeleton.c"