sysdeps/unix/sysv/minix/bits/sigaction.h

   1 /* Copyright (C) 1992, 1996, 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library 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 GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #ifndef _SIGNAL_H
  20 # error "Never include <bits/sigaction.h> directly; use <signal.h> instead."
  21 #endif
  22
  23 /* Structure describing the action to be taken when a signal arrives.  */
  24 struct sigaction
  25   {
  26     /* Signal handler.  */
  27     __sighandler_t sa_handler;
  28
  29     /* Additional set of signals to be blocked.  */
  30     __sigset_t sa_mask;
  31
  32     /* Special flags.  */
  33     int sa_flags;
  34   };
  35
  36 /* Bits in `sa_flags'.  */
  37 #ifdef  __USE_MISC
  38 # define SA_ONSTACK     0x1     /* Take signal on signal stack.  */
  39 # define SA_RESETHAND   0x2     /* Reset signal handler when signal caught.  */
  40 # define SA_NODEFER     0x4     /* Don't block signal while catching it.  */
  41 # define SA_RESTART     0x8     /* Restart syscall on signal return.  */
  42 # define SA_SIGINFO     0x10    /* Extended signal handling.  */
  43 # define SA_NOCLDWAIT   0x20    /* Don't create zombies.  */
  44 # define SA_COMPAT      0x80    /* Internal flag for old signal catchers.  */
  45 # define SA_DISABLE     0x100   /* Disable alternate signal stack.  */
  46 #endif
  47 #define SA_NOCLDSTOP    0x40    /* Don't send SIGCHLD when children stop.  */
  48
  49
  50 /* Values for the HOW argument to `sigprocmask'.  */
  51 #define SIG_BLOCK       0       /* Block signals.  */
  52 #define SIG_UNBLOCK     1       /* Unblock signals.  */
  53 #define SIG_SETMASK     2       /* Set the set of blocked signals.  */