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226 lines
7.3 KiB
C
226 lines
7.3 KiB
C
/* $Header: /src/pub/tcsh/tc.sig.h,v 3.26 2002/07/12 13:16:19 christos Exp $ */
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/*
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* tc.sig.h: Signal handling
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*
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*/
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/*-
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* Copyright (c) 1980, 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _h_tc_sig
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#define _h_tc_sig
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#if (SYSVREL > 0) || defined(BSD4_4) || defined(_MINIX) || defined(DGUX) || defined(WINNT_NATIVE)
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# include <signal.h>
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# ifndef SIGCHLD
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# define SIGCHLD SIGCLD
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# endif /* SIGCHLD */
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#else /* SYSVREL == 0 */
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# include <sys/signal.h>
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#endif /* SYSVREL > 0 */
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#if defined(__APPLE__) || defined(SUNOS4) || defined(DGUX) || defined(hp800) || (SYSVREL > 3 && defined(POSIXSIGS) && defined(VFORK))
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# define SAVESIGVEC
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#endif /* SUNOS4 || DGUX || hp800 || SVR4 & POSIXSIGS & VFORK */
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#if (SYSVREL > 0 && SYSVREL < 3 && !defined(BSDSIGS)) || defined(_MINIX) || defined(COHERENT)
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/*
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* If we have unreliable signals...
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*/
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# define UNRELSIGS
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#endif /* SYSVREL > 0 && SYSVREL < 3 && !BSDSIGS || _MINIX || COHERENT */
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#ifdef BSDSIGS
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/*
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* sigvec is not the same everywhere
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*/
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# if defined(_SEQUENT_) || (defined(_POSIX_SOURCE) && !defined(hpux))
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# define HAVE_SIGVEC
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# define mysigvec(a, b, c) sigaction(a, b, c)
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typedef struct sigaction sigvec_t;
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/* eliminate compiler warnings since these are defined in signal.h */
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# undef sv_handler
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# undef sv_flags
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# define sv_handler sa_handler
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# define sv_flags sa_flags
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# endif /* _SEQUENT || (_POSIX_SOURCE && !hpux) */
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# ifdef hpux
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# define HAVE_SIGVEC
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# define mysigvec(a, b, c) sigvector(a, b, c)
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typedef struct sigvec sigvec_t;
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# define NEEDsignal
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# endif /* hpux */
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# ifndef HAVE_SIGVEC
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# ifdef POSIXSIGS
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# define mysigvec(a, b, c) sigaction(a, b, c)
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typedef struct sigaction sigvec_t;
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# undef sv_handler
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# undef sv_flags
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# define sv_handler sa_handler
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# define sv_flags sa_flags
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# else /* BSDSIGS */
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# define mysigvec(a, b, c) sigvec(a, b, c)
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typedef struct sigvec sigvec_t;
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# endif /* POSIXSIGS */
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# endif /* HAVE_SIGVEC */
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# undef HAVE_SIGVEC
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#endif /* BSDSIGS */
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#if SYSVREL > 0
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# ifdef BSDJOBS
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/* here I assume that systems that have bsdjobs implement the
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* the setpgrp call correctly. Otherwise defining this would
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* work, but it would kill the world, because all the setpgrp
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* code is the the part defined when BSDJOBS are defined
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* NOTE: we don't want killpg(a, b) == kill(-getpgrp(a), b)
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* cause process a might be already dead and getpgrp would fail
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*/
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# define killpg(a, b) kill(-(a), (b))
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# else
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/* this is the poor man's version of killpg()! Just kill the
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* current process and don't worry about the rest. Someday
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* I hope I get to fix that.
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*/
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# define killpg(a, b) kill((a), (b))
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# endif /* BSDJOBS */
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#endif /* SYSVREL > 0 */
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#ifdef _MINIX
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# include <signal.h>
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# define killpg(a, b) kill((a), (b))
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# ifdef _MINIX_VMD
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# define signal(a, b) signal((a), (a) == SIGCHLD ? SIG_IGN : (b))
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# endif /* _MINIX_VMD */
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#endif /* _MINIX */
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#ifdef _VMS_POSIX
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# define killpg(a, b) kill(-(a), (b))
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#endif /* atp _VMS_POSIX */
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#if !defined(NSIG) && defined(SIGMAX)
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# define NSIG (SIGMAX+1)
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#endif /* !NSIG && SIGMAX */
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#if !defined(NSIG) && defined(_SIG_MAX)
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# define NSIG (_SIG_MAX+1)
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#endif /* !NSIG && _SIG_MAX */
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#if !defined(NSIG) && defined(_NSIG)
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# define NSIG _NSIG
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#endif /* !NSIG && _NSIG */
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#if !defined(MAXSIG) && defined(NSIG)
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# define MAXSIG NSIG
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#endif /* !MAXSIG && NSIG */
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#ifdef BSDSIGS
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/*
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* For 4.2bsd signals.
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*/
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# ifdef sigmask
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# undef sigmask
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# endif /* sigmask */
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# define sigmask(s) (1 << ((s)-1))
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# ifdef POSIXSIGS
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# define sigpause(a) (void) bsd_sigpause(a)
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# ifdef WINNT_NATIVE
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# undef signal
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# endif /* WINNT_NATIVE */
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# define signal(a, b) bsd_signal(a, b)
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# endif /* POSIXSIGS */
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# ifndef _SEQUENT_
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# define sighold(s) sigblock(sigmask(s))
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# define sigignore(s) signal(s, SIG_IGN)
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# define sigset(s, a) signal(s, a)
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# endif /* !_SEQUENT_ */
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# ifdef aiws
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# define sigrelse(a) sigsetmask(sigblock(0) & ~sigmask(a))
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# undef killpg
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# define killpg(a, b) kill(-getpgrp(a), b)
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# define NEEDsignal
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# endif /* aiws */
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#endif /* BSDSIGS */
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/*
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* We choose a define for the window signal if it exists..
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*/
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#ifdef SIGWINCH
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# define SIG_WINDOW SIGWINCH
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#else
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# ifdef SIGWINDOW
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# define SIG_WINDOW SIGWINDOW
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# endif /* SIGWINDOW */
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#endif /* SIGWINCH */
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#ifdef convex
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# ifdef notdef
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/* Does not seem to work right... Christos */
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# define SIGSYNCH 0
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# endif
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# ifdef SIGSYNCH
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# define SYNCHMASK (sigmask(SIGCHLD)|sigmask(SIGSYNCH))
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# else
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# define SYNCHMASK (sigmask(SIGCHLD))
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# endif
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extern sigret_t synch_handler();
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#endif /* convex */
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#ifdef SAVESIGVEC
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# define NSIGSAVED 7
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/*
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* These are not inline for speed. gcc -traditional -O on the sparc ignores
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* the fact that vfork() corrupts the registers. Calling a routine is not
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* nice, since it can make the compiler put some things that we want saved
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* into registers - christos
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*/
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# define savesigvec(sv) \
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((void) mysigvec(SIGINT, (sigvec_t *) 0, &(sv)[0]), \
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(void) mysigvec(SIGQUIT, (sigvec_t *) 0, &(sv)[1]), \
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(void) mysigvec(SIGTSTP, (sigvec_t *) 0, &(sv)[2]), \
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(void) mysigvec(SIGTTIN, (sigvec_t *) 0, &(sv)[3]), \
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(void) mysigvec(SIGTTOU, (sigvec_t *) 0, &(sv)[4]), \
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(void) mysigvec(SIGTERM, (sigvec_t *) 0, &(sv)[5]), \
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(void) mysigvec(SIGHUP, (sigvec_t *) 0, &(sv)[6]), \
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sigblock(sigmask(SIGINT) | sigmask(SIGQUIT) | \
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sigmask(SIGTSTP) | sigmask(SIGTTIN) | \
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sigmask(SIGTTOU) | sigmask(SIGTERM) | \
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sigmask(SIGHUP)))
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# define restoresigvec(sv, sm) \
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(void) ((void) mysigvec(SIGINT, &(sv)[0], (sigvec_t *) 0), \
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(void) mysigvec(SIGQUIT, &(sv)[1], (sigvec_t *) 0), \
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(void) mysigvec(SIGTSTP, &(sv)[2], (sigvec_t *) 0), \
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(void) mysigvec(SIGTTIN, &(sv)[3], (sigvec_t *) 0), \
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(void) mysigvec(SIGTTOU, &(sv)[4], (sigvec_t *) 0), \
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(void) mysigvec(SIGTERM, &(sv)[5], (sigvec_t *) 0), \
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(void) mysigvec(SIGHUP, &(sv)[6], (sigvec_t *) 0), \
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(void) sigsetmask(sm))
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# endif /* SAVESIGVEC */
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#endif /* _h_tc_sig */
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