1  /* Definitions for Linux/HPPA sigaction.
       2     Copyright (C) 1996-2023 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  #ifndef _BITS_SIGACTION_H
      20  #define _BITS_SIGACTION_H 1
      21  
      22  #ifndef _SIGNAL_H
      23  # error "Never include <bits/sigaction.h> directly; use <signal.h> instead."
      24  #endif
      25  
      26  #include <bits/wordsize.h>
      27  
      28  /* Structure describing the action to be taken when a signal arrives.  */
      29  struct sigaction
      30    {
      31      /* Signal handler.  */
      32  #if defined __USE_POSIX199309 || defined __USE_XOPEN_EXTENDED
      33      union
      34        {
      35  	/* Used if SA_SIGINFO is not set.  */
      36  	__sighandler_t sa_handler;
      37  	/* Used if SA_SIGINFO is set.  */
      38  	void (*sa_sigaction) (int, siginfo_t *, void *);
      39        }
      40      __sigaction_handler;
      41  # define sa_handler	__sigaction_handler.sa_handler
      42  # define sa_sigaction	__sigaction_handler.sa_sigaction
      43  #else
      44      __sighandler_t sa_handler;
      45  #endif
      46  
      47      /* Special flags.  */
      48  #if __WORDSIZE == 64
      49      int __glibc_reserved0;
      50  #endif
      51      int sa_flags;
      52  
      53      /* Additional set of signals to be blocked.  */
      54      __sigset_t sa_mask;
      55    };
      56  
      57  /* Bits in `sa_flags'.  */
      58  
      59  #define SA_NOCLDSTOP  0x00000008  /* Don't send SIGCHLD when children stop.  */
      60  #define SA_NOCLDWAIT  0x00000080  /* Don't create zombie on child death.  */
      61  #define SA_SIGINFO    0x00000010  /* Invoke signal-catching function with
      62  				     three arguments instead of one.  */
      63  #if defined __USE_XOPEN_EXTENDED || defined __USE_MISC
      64  # define SA_ONSTACK   0x00000001 /* Use signal stack by using `sa_restorer'. */
      65  #endif
      66  #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
      67  # define SA_RESETHAND 0x00000004 /* Reset to SIG_DFL on entry to handler.  */
      68  # define SA_NODEFER   0x00000020 /* Don't automatically block the signal
      69  				    when its handler is being executed.  */
      70  # define SA_RESTART   0x00000040 /* Restart syscall on signal return.  */
      71  #endif
      72  #ifdef __USE_MISC
      73  # define SA_INTERRUPT 0x20000000 /* Historic no-op.  */
      74  
      75  /* Some aliases for the SA_ constants.  */
      76  # define SA_NOMASK    SA_NODEFER
      77  # define SA_ONESHOT   SA_RESETHAND
      78  # define SA_STACK     SA_ONSTACK
      79  #endif
      80  
      81  /* Values for the HOW argument to `sigprocmask'.  */
      82  #define SIG_BLOCK          0	/* for blocking signals */
      83  #define SIG_UNBLOCK        1	/* for unblocking signals */
      84  #define SIG_SETMASK        2	/* for setting the signal mask */
      85  
      86  #endif