tc.sig.h revision 59243
1/* $Header: /src/pub/tcsh/tc.sig.h,v 3.20 1998/04/08 17:57:37 christos Exp $ */ 2/* 3 * tc.sig.h: Signal handling 4 * 5 */ 6/*- 7 * Copyright (c) 1980, 1991 The Regents of the University of California. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38#ifndef _h_tc_sig 39#define _h_tc_sig 40 41#if (SYSVREL > 0) || defined(BSD4_4) || defined(_MINIX) || defined(DGUX) || defined(WINNT) 42# include <signal.h> 43# ifndef SIGCHLD 44# define SIGCHLD SIGCLD 45# endif /* SIGCHLD */ 46#else /* SYSVREL == 0 */ 47# include <sys/signal.h> 48#endif /* SYSVREL > 0 */ 49 50#if defined(SUNOS4) || defined(DGUX) || defined(hp800) || (SYSVREL > 3 && defined(POSIXSIGS) && defined(VFORK)) 51# define SAVESIGVEC 52#endif /* SUNOS4 || DGUX || hp800 || SVR4 & POSIXSIGS & VFORK */ 53 54#if (SYSVREL > 0 && SYSVREL < 3 && !defined(BSDSIGS)) || defined(_MINIX) || defined(COHERENT) 55/* 56 * If we have unreliable signals... 57 */ 58# define UNRELSIGS 59#endif /* SYSVREL > 0 && SYSVREL < 3 && !BSDSIGS || _MINIX || COHERENT */ 60 61#ifdef BSDSIGS 62/* 63 * sigvec is not the same everywhere 64 */ 65# if defined(_SEQUENT_) || (defined(_POSIX_SOURCE) && !defined(hpux)) 66# define HAVE_SIGVEC 67# define mysigvec(a, b, c) sigaction(a, b, c) 68typedef struct sigaction sigvec_t; 69# if defined(convex) || defined(__convex__) 70 /* eliminate compiler warnings since these are defined in signal.h */ 71# undef sv_handler 72# undef sv_flags 73# endif 74# define sv_handler sa_handler 75# define sv_flags sa_flags 76# endif /* _SEQUENT || (_POSIX_SOURCE && !hpux) */ 77 78# ifdef hpux 79# define HAVE_SIGVEC 80# define mysigvec(a, b, c) sigvector(a, b, c) 81typedef struct sigvec sigvec_t; 82# define NEEDsignal 83# endif /* hpux */ 84 85# ifndef HAVE_SIGVEC 86# ifdef POSIXSIGS 87# define mysigvec(a, b, c) sigaction(a, b, c) 88typedef struct sigaction sigvec_t; 89# define sv_handler sa_handler 90# define sv_flags sa_flags 91# else /* BSDSIGS */ 92# define mysigvec(a, b, c) sigvec(a, b, c) 93typedef struct sigvec sigvec_t; 94# endif /* POSIXSIGS */ 95# endif /* HAVE_SIGVEC */ 96 97# undef HAVE_SIGVEC 98#endif /* BSDSIGS */ 99 100#if SYSVREL > 0 101# ifdef BSDJOBS 102/* here I assume that systems that have bsdjobs implement the 103 * the setpgrp call correctly. Otherwise defining this would 104 * work, but it would kill the world, because all the setpgrp 105 * code is the the part defined when BSDJOBS are defined 106 * NOTE: we don't want killpg(a, b) == kill(-getpgrp(a), b) 107 * cause process a might be already dead and getpgrp would fail 108 */ 109# define killpg(a, b) kill(-(a), (b)) 110# else 111/* this is the poor man's version of killpg()! Just kill the 112 * current process and don't worry about the rest. Someday 113 * I hope I get to fix that. 114 */ 115# define killpg(a, b) kill((a), (b)) 116# endif /* BSDJOBS */ 117#endif /* SYSVREL > 0 */ 118 119#ifdef _MINIX 120# include <signal.h> 121# define killpg(a, b) kill((a), (b)) 122#endif /* _MINIX */ 123 124#ifdef _VMS_POSIX 125# define killpg(a, b) kill(-(a), (b)) 126#endif /* atp _VMS_POSIX */ 127 128#if !defined(NSIG) && defined(SIGMAX) 129# define NSIG (SIGMAX+1) 130#endif /* !NSIG && SIGMAX */ 131#if !defined(NSIG) && defined(_SIG_MAX) 132# define NSIG (_SIG_MAX+1) 133#endif /* !NSIG && _SIG_MAX */ 134#if !defined(NSIG) && defined(_NSIG) 135# define NSIG _NSIG 136#endif /* !NSIG && _NSIG */ 137#if !defined(MAXSIG) && defined(NSIG) 138# define MAXSIG NSIG 139#endif /* !MAXSIG && NSIG */ 140 141#ifdef BSDSIGS 142/* 143 * For 4.2bsd signals. 144 */ 145# ifdef sigmask 146# undef sigmask 147# endif /* sigmask */ 148# define sigmask(s) (1 << ((s)-1)) 149# ifdef POSIXSIGS 150# define sigpause(a) (void) bsd_sigpause(a) 151# ifdef WINNT 152# undef signal 153# endif /* WINNT */ 154# define signal(a, b) bsd_signal(a, b) 155# endif /* POSIXSIGS */ 156# ifndef _SEQUENT_ 157# define sighold(s) sigblock(sigmask(s)) 158# define sigignore(s) signal(s, SIG_IGN) 159# define sigset(s, a) signal(s, a) 160# endif /* !_SEQUENT_ */ 161# ifdef aiws 162# define sigrelse(a) sigsetmask(sigblock(0) & ~sigmask(a)) 163# undef killpg 164# define killpg(a, b) kill(-getpgrp(a), b) 165# define NEEDsignal 166# endif /* aiws */ 167#endif /* BSDSIGS */ 168 169 170/* 171 * We choose a define for the window signal if it exists.. 172 */ 173#ifdef SIGWINCH 174# define SIG_WINDOW SIGWINCH 175#else 176# ifdef SIGWINDOW 177# define SIG_WINDOW SIGWINDOW 178# endif /* SIGWINDOW */ 179#endif /* SIGWINCH */ 180 181#ifdef convex 182# ifdef notdef 183/* Does not seem to work right... Christos */ 184# define SIGSYNCH 0 185# endif 186# ifdef SIGSYNCH 187# define SYNCHMASK (sigmask(SIGCHLD)|sigmask(SIGSYNCH)) 188# else 189# define SYNCHMASK (sigmask(SIGCHLD)) 190# endif 191extern sigret_t synch_handler(); 192#endif /* convex */ 193 194#ifdef SAVESIGVEC 195# define NSIGSAVED 7 196 /* 197 * These are not inline for speed. gcc -traditional -O on the sparc ignores 198 * the fact that vfork() corrupts the registers. Calling a routine is not 199 * nice, since it can make the compiler put some things that we want saved 200 * into registers - christos 201 */ 202# define savesigvec(sv) \ 203 ((void) mysigvec(SIGINT, (sigvec_t *) 0, &(sv)[0]), \ 204 (void) mysigvec(SIGQUIT, (sigvec_t *) 0, &(sv)[1]), \ 205 (void) mysigvec(SIGTSTP, (sigvec_t *) 0, &(sv)[2]), \ 206 (void) mysigvec(SIGTTIN, (sigvec_t *) 0, &(sv)[3]), \ 207 (void) mysigvec(SIGTTOU, (sigvec_t *) 0, &(sv)[4]), \ 208 (void) mysigvec(SIGTERM, (sigvec_t *) 0, &(sv)[5]), \ 209 (void) mysigvec(SIGHUP, (sigvec_t *) 0, &(sv)[6]), \ 210 sigblock(sigmask(SIGINT) | sigmask(SIGQUIT) | \ 211 sigmask(SIGTSTP) | sigmask(SIGTTIN) | \ 212 sigmask(SIGTTOU) | sigmask(SIGTERM) | \ 213 sigmask(SIGHUP))) 214 215# define restoresigvec(sv, sm) \ 216 (void) ((void) mysigvec(SIGINT, &(sv)[0], (sigvec_t *) 0), \ 217 (void) mysigvec(SIGQUIT, &(sv)[1], (sigvec_t *) 0), \ 218 (void) mysigvec(SIGTSTP, &(sv)[2], (sigvec_t *) 0), \ 219 (void) mysigvec(SIGTTIN, &(sv)[3], (sigvec_t *) 0), \ 220 (void) mysigvec(SIGTTOU, &(sv)[4], (sigvec_t *) 0), \ 221 (void) mysigvec(SIGTERM, &(sv)[5], (sigvec_t *) 0), \ 222 (void) mysigvec(SIGHUP, &(sv)[6], (sigvec_t *) 0), \ 223 (void) sigsetmask(sm)) 224# endif /* SAVESIGVEC */ 225 226#endif /* _h_tc_sig */ 227