1  /* Test of <signal.h> substitute.
       2     Copyright (C) 2009-2022 Free Software Foundation, Inc.
       3  
       4     This program is free software: you can redistribute it and/or modify
       5     it under the terms of the GNU General Public License as published by
       6     the Free Software Foundation, either version 3 of the License, or
       7     (at your option) any later version.
       8  
       9     This program is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12     GNU General Public License for more details.
      13  
      14     You should have received a copy of the GNU General Public License
      15     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      16  
      17  /* Written by Eric Blake <ebb9@byu.net>, 2009.  */
      18  
      19  #include <config.h>
      20  
      21  #include <signal.h>
      22  
      23  /* Check for required types.  */
      24  struct
      25  {
      26    size_t a;
      27    uid_t b;
      28    volatile sig_atomic_t c;
      29    sigset_t d;
      30    pid_t e;
      31  #if 0
      32    /* Not guaranteed by gnulib.  */
      33    pthread_t f;
      34    struct timespec g;
      35  #endif
      36  } s;
      37  
      38  /* Check that NSIG is defined.  */
      39  int nsig = NSIG;
      40  
      41  int
      42  main (void)
      43  {
      44    switch (0)
      45      {
      46        /* The following are guaranteed by C.  */
      47      case 0:
      48      case SIGABRT:
      49      case SIGFPE:
      50      case SIGILL:
      51      case SIGINT:
      52      case SIGSEGV:
      53      case SIGTERM:
      54        /* The following is guaranteed by gnulib.  */
      55  #if GNULIB_SIGPIPE || defined SIGPIPE
      56      case SIGPIPE:
      57  #endif
      58        /* Ensure no conflict with other standardized names.  */
      59  #ifdef SIGALRM
      60      case SIGALRM:
      61  #endif
      62        /* On Haiku, SIGBUS is mistakenly equal to SIGSEGV.  */
      63  #if defined SIGBUS && SIGBUS != SIGSEGV
      64      case SIGBUS:
      65  #endif
      66  #ifdef SIGCHLD
      67      case SIGCHLD:
      68  #endif
      69  #ifdef SIGCONT
      70      case SIGCONT:
      71  #endif
      72  #ifdef SIGHUP
      73      case SIGHUP:
      74  #endif
      75  #ifdef SIGKILL
      76      case SIGKILL:
      77  #endif
      78  #ifdef SIGQUIT
      79      case SIGQUIT:
      80  #endif
      81  #ifdef SIGSTOP
      82      case SIGSTOP:
      83  #endif
      84  #ifdef SIGTSTP
      85      case SIGTSTP:
      86  #endif
      87  #ifdef SIGTTIN
      88      case SIGTTIN:
      89  #endif
      90  #ifdef SIGTTOU
      91      case SIGTTOU:
      92  #endif
      93  #ifdef SIGUSR1
      94      case SIGUSR1:
      95  #endif
      96  #ifdef SIGUSR2
      97      case SIGUSR2:
      98  #endif
      99  #ifdef SIGSYS
     100      case SIGSYS:
     101  #endif
     102  #ifdef SIGTRAP
     103      case SIGTRAP:
     104  #endif
     105  #ifdef SIGURG
     106      case SIGURG:
     107  #endif
     108  #ifdef SIGVTALRM
     109      case SIGVTALRM:
     110  #endif
     111  #ifdef SIGXCPU
     112      case SIGXCPU:
     113  #endif
     114  #ifdef SIGXFSZ
     115      case SIGXFSZ:
     116  #endif
     117        /* SIGRTMIN and SIGRTMAX need not be compile-time constants.  */
     118  #if 0
     119  # ifdef SIGRTMIN
     120      case SIGRTMIN:
     121  # endif
     122  # ifdef SIGRTMAX
     123      case SIGRTMAX:
     124  # endif
     125  #endif
     126        ;
     127      }
     128    return s.a + s.b + s.c + s.e;
     129  }