sysdeps/unix/sysv/minix/sigaction.h

   1 /* Copyright (C) 1992 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 Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 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 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the, 1992 Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 /* Structure describing the action to be taken when a signal arrives.  */
  20 struct sigaction
  21   {
  22     /* Signal handler.  */
  23     __sighandler_t sa_handler;
  24
  25     /* Additional set of signals to be blocked.  */
  26     __sigset_t sa_mask;
  27
  28     /* Special flags.  */
  29     int sa_flags;
  30   };
  31
  32 /* Bits in `sa_flags'.  */
  33 #ifdef  __USE_MISC
  34 #define SA_ONSTACK      0x1     /* Take signal on signal stack.  */
  35 #define SA_RESETHAND    0x2     /* Reset signal handler when signal caught.  */
  36 #define SA_NODEFER      0x4     /* Don't block signal while catching it.  */
  37 #define SA_RESTART      0x8     /* Don't restart syscall on signal return.  */
  38 #define SA_SIGINFO      0x10    /* Extended signal handling.  */
  39 #define SA_NOCLDWAIT    0x20    /* Don't create zombies.  */
  40 #define SA_COMPAT       0x80    /* Internal flag for old signal catchers.  */
  41 #define SA_DISABLE      0x100   /* Disable alternate signal stack.  */
  42 #endif
  43 #define SA_NOCLDSTOP    0x40    /* Don't send SIGCHLD when children stop.  */
  44
  45
  46 /* Values for the HOW argument to `sigprocmask'.  */
  47 #define SIG_BLOCK       0       /* Block signals.  */
  48 #define SIG_UNBLOCK     1       /* Unblock signals.  */
  49 #define SIG_SETMASK     2       /* Set the set of blocked signals.  */