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/* $Header: /p/tcsh/cvsroot/tcsh/tc.sig.h,v 3.34 2010/11/29 15:28:58 christos Exp $ */
/*
* tc.sig.h: Signal handling
*
*/
/*-
* Copyright (c) 1980, 1991 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _h_tc_sig
#define _h_tc_sig
#if (SYSVREL > 0) || defined(BSD4_4) || defined(_MINIX) || defined(DGUX) || defined(WINNT_NATIVE) || defined(__QNXNTO__)
# include <signal.h>
# ifndef SIGCHLD
# define SIGCHLD SIGCLD
# endif /* SIGCHLD */
#else /* SYSVREL == 0 */
# include <sys/signal.h>
#endif /* SYSVREL > 0 */
#if defined(__APPLE__) || defined(SUNOS4) || defined(DGUX) || defined(hp800) || (SYSVREL > 3 && defined(VFORK))
# define SAVESIGVEC
#endif /* SUNOS4 || DGUX || hp800 || SVR4 & VFORK */
#if SYSVREL > 0
# ifdef BSDJOBS
/* here I assume that systems that have bsdjobs implement the
* the setpgrp call correctly. Otherwise defining this would
* work, but it would kill the world, because all the setpgrp
* code is the the part defined when BSDJOBS are defined
* NOTE: we don't want killpg(a, b) == kill(-getpgrp(a), b)
* cause process a might be already dead and getpgrp would fail
*/
# define killpg(a, b) kill(-(a), (b))
# else
/* this is the poor man's version of killpg()! Just kill the
* current process and don't worry about the rest. Someday
* I hope I get to fix that.
*/
# define killpg(a, b) kill((a), (b))
# endif /* BSDJOBS */
#endif /* SYSVREL > 0 */
#ifdef _MINIX
# include <signal.h>
# define killpg(a, b) kill((a), (b))
# ifdef _MINIX_VMD
# define signal(a, b) signal((a), (a) == SIGCHLD ? SIG_IGN : (b))
# endif /* _MINIX_VMD */
#endif /* _MINIX */
#ifdef _VMS_POSIX
# define killpg(a, b) kill(-(a), (b))
#endif /* atp _VMS_POSIX */
#ifdef aiws
# undef killpg
# define killpg(a, b) kill(-getpgrp(a), b)
#endif /* aiws */
#if !defined(NSIG) && defined(SIGMAX)
# define NSIG (SIGMAX+1)
#endif /* !NSIG && SIGMAX */
#if !defined(NSIG) && defined(_SIG_MAX)
# define NSIG (_SIG_MAX+1)
#endif /* !NSIG && _SIG_MAX */
#if !defined(NSIG) && defined(_NSIG)
# define NSIG _NSIG
#endif /* !NSIG && _NSIG */
#if !defined(NSIG)
#define NSIG (sizeof(sigset_t) * 8)
#endif /* !NSIG */
#if !defined(MAXSIG) && defined(NSIG)
# define MAXSIG NSIG
#endif /* !MAXSIG && NSIG */
/*
* We choose a define for the window signal if it exists..
*/
#ifdef SIGWINCH
# define SIG_WINDOW SIGWINCH
#else
# ifdef SIGWINDOW
# define SIG_WINDOW SIGWINDOW
# endif /* SIGWINDOW */
#endif /* SIGWINCH */
#ifdef SAVESIGVEC
# define NSIGSAVED 7
/*
* These are not inline for speed. gcc -traditional -O on the sparc ignores
* the fact that vfork() corrupts the registers. Calling a routine is not
* nice, since it can make the compiler put some things that we want saved
* into registers - christos
*/
# define savesigvec(sv, sm) \
do { \
sigset_t m__; \
\
sigaction(SIGINT, NULL, &(sv)[0]); \
sigaction(SIGQUIT, NULL, &(sv)[1]); \
sigaction(SIGTSTP, NULL, &(sv)[2]); \
sigaction(SIGTTIN, NULL, &(sv)[3]); \
sigaction(SIGTTOU, NULL, &(sv)[4]); \
sigaction(SIGTERM, NULL, &(sv)[5]); \
sigaction(SIGHUP, NULL, &(sv)[6]); \
sigemptyset(&m__); \
sigaddset(&m__, SIGINT); \
sigaddset(&m__, SIGQUIT); \
sigaddset(&m__, SIGTSTP); \
sigaddset(&m__, SIGTTIN); \
sigaddset(&m__, SIGTTOU); \
sigaddset(&m__, SIGTERM); \
sigaddset(&m__, SIGHUP); \
sigprocmask(SIG_BLOCK, &m__, &sm); \
} while (0)
# define restoresigvec(sv, sm) \
do { \
sigaction(SIGINT, &(sv)[0], NULL); \
sigaction(SIGQUIT, &(sv)[1], NULL); \
sigaction(SIGTSTP, &(sv)[2], NULL); \
sigaction(SIGTTIN, &(sv)[3], NULL); \
sigaction(SIGTTOU, &(sv)[4], NULL); \
sigaction(SIGTERM, &(sv)[5], NULL); \
sigaction(SIGHUP, &(sv)[6], NULL); \
sigprocmask(SIG_SETMASK, &sm, NULL); \
} while (0)
# endif /* SAVESIGVEC */
extern int alrmcatch_disabled;
extern int pchild_disabled;
extern int phup_disabled;
extern int pintr_disabled;
extern void sigset_interrupting(int, void (*) (int));
extern int handle_pending_signals(void);
extern void queue_alrmcatch(int);
extern void queue_pchild(int);
extern void queue_phup(int);
extern void queue_pintr(int);
extern void disabled_cleanup(void *);
extern void pintr_disabled_restore(void *);
extern void pintr_push_enable(int *);
#endif /* _h_tc_sig */
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