gdb/testsuite/gdb.base/signals-state-child.c

   1 /* Copyright 2016-2023 Free Software Foundation, Inc.
   2
   3    This file is part of GDB.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include <stdlib.h>
  19 #include <stdio.h>
  20 #include <signal.h>
  21 #include <assert.h>
  22 #include <errno.h>
  23
  24 #ifndef OUTPUT_TXT
  25 # define OUTPUT_TXT "output.txt"
  26 #endif
  27
  28 static void
  29 perror_and_exit (const char *s)
  30 {
  31   perror (s);
  32   exit (1);
  33 }
  34
  35 int
  36 main (int argc, char **argv)
  37 {
  38   int i;
  39   FILE *out;
  40   sigset_t sigset;
  41   int res;
  42
  43   res = sigprocmask (0,  NULL, &sigset);
  44   if (res != 0)
  45     perror_and_exit ("sigprocmask");
  46
  47   if (argc > 1)
  48     out = stdout;
  49   else
  50     {
  51       out = fopen (OUTPUT_TXT, "w");
  52       if (out == NULL)
  53         perror_and_exit ("fopen");
  54     }
  55
  56   for (i = 1; i < NSIG; i++)
  57     {
  58       struct sigaction oldact;
  59
  60       fprintf (out, "signal %d: ", i);
  61
  62       res = sigaction (i, NULL, &oldact);
  63       if (res == -1 && errno == EINVAL)
  64         {
  65           /* Some signal numbers in the range are invalid.  E.g.,
  66              signals 32 and 33 on GNU/Linux.  */
  67           fprintf (out, "invalid");
  68         }
  69       else if (res == -1)
  70         {
  71           perror_and_exit ("sigaction");
  72         }
  73       else
  74         {
  75           int m;
  76
  77           fprintf (out, "sigaction={sa_handler=");
  78
  79           if (oldact.sa_handler == SIG_DFL)
  80             fprintf (out, "SIG_DFL");
  81           else if (oldact.sa_handler == SIG_IGN)
  82             fprintf (out, "SIG_IGN");
  83           else
  84             abort ();
  85
  86           fprintf (out, ", sa_mask=");
  87           for (m = 1; m < NSIG; m++)
  88             fprintf (out, "%c", sigismember (&oldact.sa_mask, m) ? '1' : '0');
  89
  90           fprintf (out, ", sa_flags=%d", oldact.sa_flags);
  91
  92           fprintf (out, "}, masked=%d", sigismember (&sigset, i));
  93         }
  94       fprintf (out, "\n");
  95     }
  96
  97   if (out != stdout)
  98     fclose (out);
  99
 100   return 0;
 101 }