tc.sig.h revision 145479
1/* $Header: /src/pub/tcsh/tc.sig.h,v 3.28 2005/01/18 20:24:51 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34#ifndef _h_tc_sig 35#define _h_tc_sig 36 37#if (SYSVREL > 0) || defined(BSD4_4) || defined(_MINIX) || defined(DGUX) || defined(WINNT_NATIVE) 38# include <signal.h> 39# ifndef SIGCHLD 40# define SIGCHLD SIGCLD 41# endif /* SIGCHLD */ 42#else /* SYSVREL == 0 */ 43# include <sys/signal.h> 44#endif /* SYSVREL > 0 */ 45 46#if defined(__APPLE__) || defined(SUNOS4) || defined(DGUX) || defined(hp800) || (SYSVREL > 3 && defined(POSIXSIGS) && defined(VFORK)) 47# define SAVESIGVEC 48#endif /* SUNOS4 || DGUX || hp800 || SVR4 & POSIXSIGS & VFORK */ 49 50#if (SYSVREL > 0 && SYSVREL < 3 && !defined(BSDSIGS)) || defined(_MINIX) || defined(COHERENT) 51/* 52 * If we have unreliable signals... 53 */ 54# define UNRELSIGS 55#endif /* SYSVREL > 0 && SYSVREL < 3 && !BSDSIGS || _MINIX || COHERENT */ 56 57#ifdef BSDSIGS 58/* 59 * sigvec is not the same everywhere 60 */ 61# if defined(_SEQUENT_) || (defined(_POSIX_SOURCE) && !defined(hpux)) 62# define HAVE_SIGVEC 63# define mysigvec(a, b, c) sigaction(a, b, c) 64typedef struct sigaction sigvec_t; 65/* eliminate compiler warnings since these are defined in signal.h */ 66# undef sv_handler 67# undef sv_flags 68# define sv_handler sa_handler 69# define sv_flags sa_flags 70# endif /* _SEQUENT || (_POSIX_SOURCE && !hpux) */ 71 72# ifdef hpux 73# define HAVE_SIGVEC 74# define mysigvec(a, b, c) sigvector(a, b, c) 75typedef struct sigvec sigvec_t; 76# define NEEDsignal 77# endif /* hpux */ 78 79# ifndef HAVE_SIGVEC 80# ifdef POSIXSIGS 81# define mysigvec(a, b, c) sigaction(a, b, c) 82typedef struct sigaction sigvec_t; 83# undef sv_handler 84# undef sv_flags 85# define sv_handler sa_handler 86# define sv_flags sa_flags 87# else /* BSDSIGS */ 88# define mysigvec(a, b, c) sigvec(a, b, c) 89typedef struct sigvec sigvec_t; 90# endif /* POSIXSIGS */ 91# endif /* HAVE_SIGVEC */ 92 93# undef HAVE_SIGVEC 94#endif /* BSDSIGS */ 95 96#if SYSVREL > 0 97# ifdef BSDJOBS 98/* here I assume that systems that have bsdjobs implement the 99 * the setpgrp call correctly. Otherwise defining this would 100 * work, but it would kill the world, because all the setpgrp 101 * code is the the part defined when BSDJOBS are defined 102 * NOTE: we don't want killpg(a, b) == kill(-getpgrp(a), b) 103 * cause process a might be already dead and getpgrp would fail 104 */ 105# define killpg(a, b) kill(-(a), (b)) 106# else 107/* this is the poor man's version of killpg()! Just kill the 108 * current process and don't worry about the rest. Someday 109 * I hope I get to fix that. 110 */ 111# define killpg(a, b) kill((a), (b)) 112# endif /* BSDJOBS */ 113#endif /* SYSVREL > 0 */ 114 115#ifdef _MINIX 116# include <signal.h> 117# define killpg(a, b) kill((a), (b)) 118# ifdef _MINIX_VMD 119# define signal(a, b) signal((a), (a) == SIGCHLD ? SIG_IGN : (b)) 120# endif /* _MINIX_VMD */ 121#endif /* _MINIX */ 122 123#ifdef _VMS_POSIX 124# define killpg(a, b) kill(-(a), (b)) 125#endif /* atp _VMS_POSIX */ 126 127#if !defined(NSIG) && defined(SIGMAX) 128# define NSIG (SIGMAX+1) 129#endif /* !NSIG && SIGMAX */ 130#if !defined(NSIG) && defined(_SIG_MAX) 131# define NSIG (_SIG_MAX+1) 132#endif /* !NSIG && _SIG_MAX */ 133#if !defined(NSIG) && defined(_NSIG) 134# define NSIG _NSIG 135#endif /* !NSIG && _NSIG */ 136#if !defined(NSIG) 137#define NSIG (sizeof(sigset_t) * 8) 138#endif /* !NSIG */ 139#if !defined(MAXSIG) && defined(NSIG) 140# define MAXSIG NSIG 141#endif /* !MAXSIG && NSIG */ 142 143#ifdef BSDSIGS 144/* 145 * For 4.2bsd signals. 146 */ 147# ifdef sigmask 148# undef sigmask 149# endif /* sigmask */ 150# define sigmask(s) (1 << ((s)-1)) 151# ifdef POSIXSIGS 152# define sigpause(a) (void) bsd_sigpause(a) 153# ifdef WINNT_NATIVE 154# undef signal 155# endif /* WINNT_NATIVE */ 156# define signal(a, b) bsd_signal(a, b) 157# endif /* POSIXSIGS */ 158# ifndef _SEQUENT_ 159# define sighold(s) sigblock(sigmask(s)) 160# define sigignore(s) signal(s, SIG_IGN) 161# define sigset(s, a) signal(s, a) 162# endif /* !_SEQUENT_ */ 163# ifdef aiws 164# define sigrelse(a) sigsetmask(sigblock(0) & ~sigmask(a)) 165# undef killpg 166# define killpg(a, b) kill(-getpgrp(a), b) 167# define NEEDsignal 168# endif /* aiws */ 169#endif /* BSDSIGS */ 170 171 172/* 173 * We choose a define for the window signal if it exists.. 174 */ 175#ifdef SIGWINCH 176# define SIG_WINDOW SIGWINCH 177#else 178# ifdef SIGWINDOW 179# define SIG_WINDOW SIGWINDOW 180# endif /* SIGWINDOW */ 181#endif /* SIGWINCH */ 182 183#ifdef convex 184# ifdef notdef 185/* Does not seem to work right... Christos */ 186# define SIGSYNCH 0 187# endif 188# ifdef SIGSYNCH 189# define SYNCHMASK (sigmask(SIGCHLD)|sigmask(SIGSYNCH)) 190# else 191# define SYNCHMASK (sigmask(SIGCHLD)) 192# endif 193extern RETSIGTYPE synch_handler(); 194#endif /* convex */ 195 196#ifdef SAVESIGVEC 197# define NSIGSAVED 7 198 /* 199 * These are not inline for speed. gcc -traditional -O on the sparc ignores 200 * the fact that vfork() corrupts the registers. Calling a routine is not 201 * nice, since it can make the compiler put some things that we want saved 202 * into registers - christos 203 */ 204# define savesigvec(sv) \ 205 ((void) mysigvec(SIGINT, (sigvec_t *) 0, &(sv)[0]), \ 206 (void) mysigvec(SIGQUIT, (sigvec_t *) 0, &(sv)[1]), \ 207 (void) mysigvec(SIGTSTP, (sigvec_t *) 0, &(sv)[2]), \ 208 (void) mysigvec(SIGTTIN, (sigvec_t *) 0, &(sv)[3]), \ 209 (void) mysigvec(SIGTTOU, (sigvec_t *) 0, &(sv)[4]), \ 210 (void) mysigvec(SIGTERM, (sigvec_t *) 0, &(sv)[5]), \ 211 (void) mysigvec(SIGHUP, (sigvec_t *) 0, &(sv)[6]), \ 212 sigblock(sigmask(SIGINT) | sigmask(SIGQUIT) | \ 213 sigmask(SIGTSTP) | sigmask(SIGTTIN) | \ 214 sigmask(SIGTTOU) | sigmask(SIGTERM) | \ 215 sigmask(SIGHUP))) 216 217# define restoresigvec(sv, sm) \ 218 (void) ((void) mysigvec(SIGINT, &(sv)[0], (sigvec_t *) 0), \ 219 (void) mysigvec(SIGQUIT, &(sv)[1], (sigvec_t *) 0), \ 220 (void) mysigvec(SIGTSTP, &(sv)[2], (sigvec_t *) 0), \ 221 (void) mysigvec(SIGTTIN, &(sv)[3], (sigvec_t *) 0), \ 222 (void) mysigvec(SIGTTOU, &(sv)[4], (sigvec_t *) 0), \ 223 (void) mysigvec(SIGTERM, &(sv)[5], (sigvec_t *) 0), \ 224 (void) mysigvec(SIGHUP, &(sv)[6], (sigvec_t *) 0), \ 225 (void) sigsetmask(sm)) 226# endif /* SAVESIGVEC */ 227 228#endif /* _h_tc_sig */ 229