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/* $Header: /src/pub/tcsh/tc.sig.h,v 3.28 2005/01/18 20:24:51 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)
# 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(POSIXSIGS) && defined(VFORK))
# define SAVESIGVEC
#endif /* SUNOS4 || DGUX || hp800 || SVR4 & POSIXSIGS & VFORK */
#if (SYSVREL > 0 && SYSVREL < 3 && !defined(BSDSIGS)) || defined(_MINIX) || defined(COHERENT)
/*
* If we have unreliable signals...
*/
# define UNRELSIGS
#endif /* SYSVREL > 0 && SYSVREL < 3 && !BSDSIGS || _MINIX || COHERENT */
#ifdef BSDSIGS
/*
* sigvec is not the same everywhere
*/
# if defined(_SEQUENT_) || (defined(_POSIX_SOURCE) && !defined(hpux))
# define HAVE_SIGVEC
# define mysigvec(a, b, c) sigaction(a, b, c)
typedef struct sigaction sigvec_t;
/* eliminate compiler warnings since these are defined in signal.h */
# undef sv_handler
# undef sv_flags
# define sv_handler sa_handler
# define sv_flags sa_flags
# endif /* _SEQUENT || (_POSIX_SOURCE && !hpux) */
# ifdef hpux
# define HAVE_SIGVEC
# define mysigvec(a, b, c) sigvector(a, b, c)
typedef struct sigvec sigvec_t;
# define NEEDsignal
# endif /* hpux */
# ifndef HAVE_SIGVEC
# ifdef POSIXSIGS
# define mysigvec(a, b, c) sigaction(a, b, c)
typedef struct sigaction sigvec_t;
# undef sv_handler
# undef sv_flags
# define sv_handler sa_handler
# define sv_flags sa_flags
# else /* BSDSIGS */
# define mysigvec(a, b, c) sigvec(a, b, c)
typedef struct sigvec sigvec_t;
# endif /* POSIXSIGS */
# endif /* HAVE_SIGVEC */
# undef HAVE_SIGVEC
#endif /* BSDSIGS */
#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 */
#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 */
#ifdef BSDSIGS
/*
* For 4.2bsd signals.
*/
# ifdef sigmask
# undef sigmask
# endif /* sigmask */
# define sigmask(s) (1 << ((s)-1))
# ifdef POSIXSIGS
# define sigpause(a) (void) bsd_sigpause(a)
# ifdef WINNT_NATIVE
# undef signal
# endif /* WINNT_NATIVE */
# define signal(a, b) bsd_signal(a, b)
# endif /* POSIXSIGS */
# ifndef _SEQUENT_
# define sighold(s) sigblock(sigmask(s))
# define sigignore(s) signal(s, SIG_IGN)
# define sigset(s, a) signal(s, a)
# endif /* !_SEQUENT_ */
# ifdef aiws
# define sigrelse(a) sigsetmask(sigblock(0) & ~sigmask(a))
# undef killpg
# define killpg(a, b) kill(-getpgrp(a), b)
# define NEEDsignal
# endif /* aiws */
#endif /* BSDSIGS */
/*
* 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 convex
# ifdef notdef
/* Does not seem to work right... Christos */
# define SIGSYNCH 0
# endif
# ifdef SIGSYNCH
# define SYNCHMASK (sigmask(SIGCHLD)|sigmask(SIGSYNCH))
# else
# define SYNCHMASK (sigmask(SIGCHLD))
# endif
extern RETSIGTYPE synch_handler();
#endif /* convex */
#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) \
((void) mysigvec(SIGINT, (sigvec_t *) 0, &(sv)[0]), \
(void) mysigvec(SIGQUIT, (sigvec_t *) 0, &(sv)[1]), \
(void) mysigvec(SIGTSTP, (sigvec_t *) 0, &(sv)[2]), \
(void) mysigvec(SIGTTIN, (sigvec_t *) 0, &(sv)[3]), \
(void) mysigvec(SIGTTOU, (sigvec_t *) 0, &(sv)[4]), \
(void) mysigvec(SIGTERM, (sigvec_t *) 0, &(sv)[5]), \
(void) mysigvec(SIGHUP, (sigvec_t *) 0, &(sv)[6]), \
sigblock(sigmask(SIGINT) | sigmask(SIGQUIT) | \
sigmask(SIGTSTP) | sigmask(SIGTTIN) | \
sigmask(SIGTTOU) | sigmask(SIGTERM) | \
sigmask(SIGHUP)))
# define restoresigvec(sv, sm) \
(void) ((void) mysigvec(SIGINT, &(sv)[0], (sigvec_t *) 0), \
(void) mysigvec(SIGQUIT, &(sv)[1], (sigvec_t *) 0), \
(void) mysigvec(SIGTSTP, &(sv)[2], (sigvec_t *) 0), \
(void) mysigvec(SIGTTIN, &(sv)[3], (sigvec_t *) 0), \
(void) mysigvec(SIGTTOU, &(sv)[4], (sigvec_t *) 0), \
(void) mysigvec(SIGTERM, &(sv)[5], (sigvec_t *) 0), \
(void) mysigvec(SIGHUP, &(sv)[6], (sigvec_t *) 0), \
(void) sigsetmask(sm))
# endif /* SAVESIGVEC */
#endif /* _h_tc_sig */
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