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

   1 /* Definitions for Linux/HPPA sigaction.
   2    Copyright (C) 1996-2015 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _SIGNAL_H
  20 # error "Never include <bits/sigaction.h> directly; use <signal.h> instead."
  21 #endif
  22
  23 #include <bits/wordsize.h>
  24
  25 /* Structure describing the action to be taken when a signal arrives.  */
  26 struct sigaction
  27   {
  28     /* Signal handler.  */
  29 #ifdef __USE_POSIX199309
  30     union
  31       {
  32         /* Used if SA_SIGINFO is not set.  */
  33         __sighandler_t sa_handler;
  34         /* Used if SA_SIGINFO is set.  */
  35         void (*sa_sigaction) (int, siginfo_t *, void *);
  36       }
  37     __sigaction_handler;
  38 # define sa_handler     __sigaction_handler.sa_handler
  39 # define sa_sigaction   __sigaction_handler.sa_sigaction
  40 #else
  41     __sighandler_t sa_handler;
  42 #endif
  43
  44     /* Special flags.  */
  45 #if __WORDSIZE == 64
  46     int __glibc_reserved0;
  47 #endif
  48     int sa_flags;
  49
  50     /* Additional set of signals to be blocked.  */
  51     __sigset_t sa_mask;
  52   };
  53
  54 /* Bits in `sa_flags'.  */
  55
  56 #define SA_NOCLDSTOP  0x00000008  /* Don't send SIGCHLD when children stop.  */
  57 #define SA_NOCLDWAIT  0x00000080  /* Don't create zombie on child death.  */
  58 #define SA_SIGINFO    0x00000010  /* Invoke signal-catching function with
  59                                      three arguments instead of one.  */
  60 #if defined __USE_UNIX98 || defined __USE_MISC
  61 # define SA_ONSTACK   0x00000001 /* Use signal stack by using `sa_restorer'. */
  62 #endif
  63 #if defined __USE_UNIX98 || defined __USE_XOPEN2K8
  64 # define SA_RESETHAND 0x00000004 /* Reset to SIG_DFL on entry to handler.  */
  65 # define SA_NODEFER   0x00000020 /* Don't automatically block the signal
  66                                     when its handler is being executed.  */
  67 # define SA_RESTART   0x00000040 /* Restart syscall on signal return.  */
  68 #endif
  69 #ifdef __USE_MISC
  70 # define SA_INTERRUPT 0x20000000 /* Historic no-op.  */
  71
  72 /* Some aliases for the SA_ constants.  */
  73 # define SA_NOMASK    SA_NODEFER
  74 # define SA_ONESHOT   SA_RESETHAND
  75 # define SA_STACK     SA_ONSTACK
  76 #endif
  77
  78 /* Values for the HOW argument to `sigprocmask'.  */
  79 #define SIG_BLOCK          0    /* for blocking signals */
  80 #define SIG_UNBLOCK        1    /* for unblocking signals */
  81 #define SIG_SETMASK        2    /* for setting the signal mask */