mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2025-01-07 15:21:46 +00:00
199 lines
5.1 KiB
C
199 lines
5.1 KiB
C
/* syssignal.h - System-dependent definitions for signals.
|
|
Copyright (C) 1993, 1999 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Emacs.
|
|
|
|
GNU Emacs is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Emacs is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Emacs; see the file COPYING. If not, write to
|
|
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#ifdef POSIX_SIGNALS
|
|
|
|
/* Don't #include <signal.h>. That header should always be #included
|
|
before "config.h", because some configuration files (like s/hpux.h)
|
|
indicate that SIGIO doesn't work by #undef-ing SIGIO. If this file
|
|
#includes <signal.h>, then that will re-#define SIGIO and confuse
|
|
things. */
|
|
|
|
#define SIGMASKTYPE sigset_t
|
|
|
|
#define SIGEMPTYMASK (empty_mask)
|
|
#define SIGFULLMASK (full_mask)
|
|
extern sigset_t empty_mask, full_mask;
|
|
extern void init_signals P_ ((void));
|
|
|
|
/* POSIX pretty much destroys any possibility of writing sigmask as a
|
|
macro in standard C. We always define our own version because the
|
|
predefined macro in Glibc 2.1 is only provided for compatility for old
|
|
programs that use int as signal mask type. */
|
|
#undef sigmask
|
|
#ifdef __GNUC__
|
|
#define sigmask(SIG) \
|
|
({ \
|
|
sigset_t _mask; \
|
|
sigemptyset (&_mask); \
|
|
sigaddset (&_mask, SIG); \
|
|
_mask; \
|
|
})
|
|
#else /* ! defined (__GNUC__) */
|
|
extern sigset_t sys_sigmask ();
|
|
#define sigmask(SIG) (sys_sigmask (SIG))
|
|
#endif /* ! defined (__GNUC__) */
|
|
|
|
#undef sigpause
|
|
#define sigpause(MASK) sigsuspend (&(MASK))
|
|
|
|
#define sigblock(SIG) sys_sigblock (SIG)
|
|
#define sigunblock(SIG) sys_sigunblock (SIG)
|
|
#ifndef sigsetmask
|
|
#define sigsetmask(SIG) sys_sigsetmask (SIG)
|
|
#endif
|
|
#define sighold(SIG) ONLY_USED_IN_BSD_4_1
|
|
#define sigrelse(SIG) ONLY_USED_IN_BSD_4_1
|
|
#undef signal
|
|
#define signal(SIG,ACT) sys_signal(SIG,ACT)
|
|
|
|
/* Whether this is what all systems want or not, this is what
|
|
appears to be assumed in the source, for example data.c:arith_error. */
|
|
typedef RETSIGTYPE (*signal_handler_t) (/*int*/);
|
|
|
|
signal_handler_t sys_signal P_ ((int signal_number, signal_handler_t action));
|
|
sigset_t sys_sigblock P_ ((sigset_t new_mask));
|
|
sigset_t sys_sigunblock P_ ((sigset_t new_mask));
|
|
sigset_t sys_sigsetmask P_ ((sigset_t new_mask));
|
|
|
|
#define sys_sigdel(MASK,SIG) sigdelset (&MASK,SIG)
|
|
|
|
#else /* ! defined (POSIX_SIGNALS) */
|
|
#ifdef USG5_4
|
|
|
|
extern SIGMASKTYPE sigprocmask_set;
|
|
|
|
#ifndef sigblock
|
|
#define sigblock(sig) \
|
|
(sigprocmask_set = SIGEMPTYMASK | (sig), \
|
|
sigprocmask (SIG_BLOCK, &sigprocmask_set, NULL))
|
|
#endif
|
|
|
|
#ifndef sigunblock
|
|
#define sigunblock(sig) \
|
|
(sigprocmask_set = SIGFULLMASK & ~(sig), \
|
|
sigprocmask (SIG_SETMASK, &sigprocmask_set, NULL))
|
|
#endif
|
|
|
|
#else
|
|
#ifdef USG
|
|
|
|
#ifndef sigunblock
|
|
#define sigunblock(sig)
|
|
#endif
|
|
|
|
#else
|
|
|
|
#ifndef sigunblock
|
|
#define sigunblock(SIG) \
|
|
{ SIGMASKTYPE omask = sigblock (SIGEMPTYMASK); sigsetmask (omask & ~SIG); }
|
|
#endif
|
|
|
|
#endif /* ! defined (USG) */
|
|
#endif /* ! defined (USG5_4) */
|
|
#endif /* ! defined (POSIX_SIGNALS) */
|
|
|
|
#ifndef SIGMASKTYPE
|
|
#define SIGMASKTYPE int
|
|
#endif
|
|
|
|
#ifndef SIGEMPTYMASK
|
|
#define SIGEMPTYMASK (0)
|
|
#endif
|
|
|
|
#ifndef SIGFULLMASK
|
|
#define SIGFULLMASK (0xffffffff)
|
|
#endif
|
|
|
|
#ifndef sigmask
|
|
#define sigmask(no) (1L << ((no) - 1))
|
|
#endif
|
|
|
|
#ifndef sigunblock
|
|
#define sigunblock(SIG) \
|
|
{ SIGMASKTYPE omask = sigblock (SIGFULLMASK); sigsetmask (omask & ~SIG); }
|
|
#endif
|
|
|
|
#ifndef BSD4_1
|
|
#define sigfree() sigsetmask (SIGEMPTYMASK)
|
|
#endif /* not BSD4_1 */
|
|
|
|
#if defined (SIGINFO) && defined (BROKEN_SIGINFO)
|
|
#undef SIGINFO
|
|
#endif
|
|
#if defined (SIGIO) && defined (BROKEN_SIGIO)
|
|
#undef SIGIO
|
|
#endif
|
|
#if defined (SIGPOLL) && defined (BROKEN_SIGPOLL)
|
|
#undef SIGPOLL
|
|
#endif
|
|
#if defined (SIGTSTP) && defined (BROKEN_SIGTSTP)
|
|
#undef SIGTSTP
|
|
#endif
|
|
#if defined (SIGURG) && defined (BROKEN_SIGURG)
|
|
#undef SIGURG
|
|
#endif
|
|
#if defined (SIGAIO) && defined (BROKEN_SIGAIO)
|
|
#undef SIGAIO
|
|
#endif
|
|
#if defined (SIGPTY) && defined (BROKEN_SIGPTY)
|
|
#undef SIGPTY
|
|
#endif
|
|
|
|
|
|
#if NSIG < NSIG_MINIMUM
|
|
# ifdef NSIG
|
|
# undef NSIG
|
|
# endif
|
|
# define NSIG NSIG_MINIMUM
|
|
#endif
|
|
|
|
#ifdef BSD4_1
|
|
#define SIGIO SIGTINT
|
|
/* sigfree is in sysdep.c */
|
|
#endif /* BSD4_1 */
|
|
|
|
/* On bsd, [man says] kill does not accept a negative number to kill a pgrp.
|
|
Must do that using the killpg call. */
|
|
#ifdef BSD_SYSTEM
|
|
#define EMACS_KILLPG(gid, signo) (killpg ( (gid), (signo)))
|
|
#else
|
|
#ifdef WINDOWSNT
|
|
#define EMACS_KILLPG(gid, signo) (kill (gid, signo))
|
|
#else
|
|
#define EMACS_KILLPG(gid, signo) (kill (-(gid), (signo)))
|
|
#endif
|
|
#endif
|
|
|
|
/* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
|
|
testing SIGCHLD. */
|
|
#ifndef VMS
|
|
#ifdef SIGCLD
|
|
#ifndef SIGCHLD
|
|
#define SIGCHLD SIGCLD
|
|
#endif /* SIGCHLD */
|
|
#endif /* ! defined (SIGCLD) */
|
|
#endif /* VMS */
|
|
|
|
#ifndef HAVE_STRSIGNAL
|
|
/* strsignal is in sysdep.c */
|
|
char *strsignal ();
|
|
#endif
|