libc/sysdeps/linux/mips/bits/sigaction.h

   1 /* The proper definitions for Linux/MIPS's sigaction.
   2    Copyright (C) 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2003
   3         Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef _SIGNAL_H
  21 # error "Never include <bits/sigaction.h> directly; use <signal.h> instead."
  22 #endif
  23
  24 /* Structure describing the action to be taken when a signal arrives.  */
  25 struct sigaction {
  26         unsigned        sa_flags;
  27 #ifdef __USE_POSIX199309
  28         union {
  29                 __sighandler_t sa_handler;
  30                 void (*sa_sigaction)(int, siginfo_t *, void *);
  31         } __sigaction_handler;
  32 # define sa_handler     __sigaction_handler.sa_handler
  33 # define sa_sigaction   __sigaction_handler.sa_sigaction
  34 #else
  35         __sighandler_t  sa_handler;
  36 #endif
  37         sigset_t        sa_mask;
  38         void            (*sa_restorer)(void);
  39         /*int           s_resv[1]; - reserved [deleted in uclibc] */
  40 };
  41
  42 /* Bits in `sa_flags'.  */
  43 /* Please note that some Linux kernels versions use different values for these
  44    flags which is a bug in those kernel versions.  */
  45 #define SA_NOCLDSTOP  0x00000001 /* Don't send SIGCHLD when children stop.  */
  46 #define SA_NOCLDWAIT  0x00010000 /* Don't create zombie on child death.  */
  47 #define SA_SIGINFO    0x00000008 /* Invoke signal-catching function with
  48                                     three arguments instead of one.  */
  49 #if defined __USE_UNIX98 || defined __USE_MISC
  50 # define SA_ONSTACK   0x08000000 /* Use signal stack by using `sa_restorer'. */
  51 # define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler.  */
  52 # define SA_RESTART   0x10000000 /* Restart syscall on signal return.  */
  53 # define SA_NODEFER   0x40000000 /* Don't automatically block the signal when
  54                                     its handler is being executed.  */
  55 #endif
  56 #ifdef __USE_MISC
  57 # define SA_INTERRUPT 0x20000000 /* Historical no-op.  */
  58
  59 /* Some aliases for the SA_ constants.  */
  60 # define SA_NOMASK    SA_NODEFER
  61 # define SA_ONESHOT   SA_RESETHAND
  62 # define SA_STACK     SA_ONSTACK
  63 #endif
  64
  65 /* Values for the HOW argument to `sigprocmask'.  */
  66 #define SIG_NOP       0         /* 0 is unused to catch errors */
  67 #define SIG_BLOCK     1         /* Block signals.  */
  68 #define SIG_UNBLOCK   2         /* Unblock signals.  */
  69 #define SIG_SETMASK   3         /* Set the set of blocked signals.  */
  70 #ifdef __USE_MISC
  71 # define SIG_SETMASK32 256      /* Goodie from SGI for BSD compatibility:
  72                                    set only the low 32 bit of the sigset.  */
  73 #endif