sysdeps/unix/sysv/linux/hppa/bits/sigaction.h

   1 /* Definitions for Linux/HPPA sigaction.
   2    Copyright (C) 1996-2020 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