1  /* The proper definitions for Linux/SPARC 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      /* Additional set of signals to be blocked.  */
      48      __sigset_t sa_mask;
      49  
      50      /* Special flags.  */
      51  #if __WORDSIZE == 64
      52      int __glibc_reserved0;
      53  #endif
      54      int sa_flags;
      55  
      56      /* Not used by Linux/Sparc yet.  */
      57      void (*sa_restorer) (void);
      58    };
      59  
      60  
      61  /* Bits in `sa_flags'.  */
      62  #define	SA_NOCLDSTOP 0x00000008  /* Don't send SIGCHLD when children stop.  */
      63  #define SA_NOCLDWAIT 0x00000100  /* Don't create zombie on child death.  */
      64  #define SA_SIGINFO   0x00000200  /* Invoke signal-catching function with
      65  				    three arguments instead of one.  */
      66  #if defined __USE_XOPEN_EXTENDED || defined __USE_MISC
      67  # define SA_ONSTACK   0x00000001 /* Use signal stack by using `sa_restorer'. */
      68  #endif
      69  #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
      70  # define SA_RESTART   0x00000002 /* Restart syscall on signal return.  */
      71  # define SA_NODEFER   0x00000020 /* Don't automatically block the signal when
      72  				    its handler is being executed.  */
      73  # define SA_RESETHAND 0x00000004 /* Reset to SIG_DFL on entry to handler.  */
      74  #endif
      75  #ifdef __USE_MISC
      76  # define SA_INTERRUPT 0x00000010 /* Historical no-op.  */
      77  
      78  /* Some aliases for the SA_ constants.  */
      79  # define SA_NOMASK    SA_NODEFER
      80  # define SA_ONESHOT   SA_RESETHAND
      81  # define SA_STACK     SA_ONSTACK
      82  #endif
      83  
      84  /* Values for the HOW argument to `sigprocmask'.  */
      85  #define	SIG_BLOCK     1		 /* Block signals.  */
      86  #define	SIG_UNBLOCK   2		 /* Unblock signals.  */
      87  #define	SIG_SETMASK   4		 /* Set the set of blocked signals.  */
      88  
      89  #endif