Import tcsh-6.17.00
[dragonfly.git] / contrib / tcsh-6 / tc.sig.h
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57e3f2b5 1/* $Header: /p/tcsh/cvsroot/tcsh/tc.sig.h,v 3.33 2007/07/05 14:13:06 christos Exp $ */
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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
57e3f2b5 37#if (SYSVREL > 0) || defined(BSD4_4) || defined(_MINIX) || defined(DGUX) || defined(WINNT_NATIVE) || defined(__QNXNTO__)
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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(VFORK))
47# define SAVESIGVEC
48#endif /* SUNOS4 || DGUX || hp800 || SVR4 & VFORK */
49
50#if SYSVREL > 0
51# ifdef BSDJOBS
52/* here I assume that systems that have bsdjobs implement the
53 * the setpgrp call correctly. Otherwise defining this would
54 * work, but it would kill the world, because all the setpgrp
55 * code is the the part defined when BSDJOBS are defined
56 * NOTE: we don't want killpg(a, b) == kill(-getpgrp(a), b)
57 * cause process a might be already dead and getpgrp would fail
58 */
59# define killpg(a, b) kill(-(a), (b))
60# else
61/* this is the poor man's version of killpg()! Just kill the
62 * current process and don't worry about the rest. Someday
63 * I hope I get to fix that.
64 */
65# define killpg(a, b) kill((a), (b))
66# endif /* BSDJOBS */
67#endif /* SYSVREL > 0 */
68
69#ifdef _MINIX
70# include <signal.h>
71# define killpg(a, b) kill((a), (b))
72# ifdef _MINIX_VMD
73# define signal(a, b) signal((a), (a) == SIGCHLD ? SIG_IGN : (b))
74# endif /* _MINIX_VMD */
75#endif /* _MINIX */
76
77#ifdef _VMS_POSIX
78# define killpg(a, b) kill(-(a), (b))
79#endif /* atp _VMS_POSIX */
80
81#ifdef aiws
82# undef killpg
83# define killpg(a, b) kill(-getpgrp(a), b)
84#endif /* aiws */
85
86#if !defined(NSIG) && defined(SIGMAX)
87# define NSIG (SIGMAX+1)
88#endif /* !NSIG && SIGMAX */
89#if !defined(NSIG) && defined(_SIG_MAX)
90# define NSIG (_SIG_MAX+1)
91#endif /* !NSIG && _SIG_MAX */
92#if !defined(NSIG) && defined(_NSIG)
93# define NSIG _NSIG
94#endif /* !NSIG && _NSIG */
95#if !defined(NSIG)
96#define NSIG (sizeof(sigset_t) * 8)
97#endif /* !NSIG */
98#if !defined(MAXSIG) && defined(NSIG)
99# define MAXSIG NSIG
100#endif /* !MAXSIG && NSIG */
101
102/*
103 * We choose a define for the window signal if it exists..
104 */
105#ifdef SIGWINCH
106# define SIG_WINDOW SIGWINCH
107#else
108# ifdef SIGWINDOW
109# define SIG_WINDOW SIGWINDOW
110# endif /* SIGWINDOW */
111#endif /* SIGWINCH */
112
113#ifdef SAVESIGVEC
114# define NSIGSAVED 7
115 /*
116 * These are not inline for speed. gcc -traditional -O on the sparc ignores
117 * the fact that vfork() corrupts the registers. Calling a routine is not
118 * nice, since it can make the compiler put some things that we want saved
119 * into registers - christos
120 */
121# define savesigvec(sv, sm) \
122 do { \
123 sigset_t m__; \
124 \
125 sigaction(SIGINT, NULL, &(sv)[0]); \
126 sigaction(SIGQUIT, NULL, &(sv)[1]); \
127 sigaction(SIGTSTP, NULL, &(sv)[2]); \
128 sigaction(SIGTTIN, NULL, &(sv)[3]); \
129 sigaction(SIGTTOU, NULL, &(sv)[4]); \
130 sigaction(SIGTERM, NULL, &(sv)[5]); \
131 sigaction(SIGHUP, NULL, &(sv)[6]); \
132 sigemptyset(&m__); \
133 sigaddset(&m__, SIGINT); \
134 sigaddset(&m__, SIGQUIT); \
135 sigaddset(&m__, SIGTSTP); \
136 sigaddset(&m__, SIGTTIN); \
137 sigaddset(&m__, SIGTTOU); \
138 sigaddset(&m__, SIGTERM); \
139 sigaddset(&m__, SIGHUP); \
140 sigprocmask(SIG_BLOCK, &m__, &sm); \
141 } while (0)
142
143# define restoresigvec(sv, sm) \
144 do { \
145 sigaction(SIGINT, &(sv)[0], NULL); \
146 sigaction(SIGQUIT, &(sv)[1], NULL); \
147 sigaction(SIGTSTP, &(sv)[2], NULL); \
148 sigaction(SIGTTIN, &(sv)[3], NULL); \
149 sigaction(SIGTTOU, &(sv)[4], NULL); \
150 sigaction(SIGTERM, &(sv)[5], NULL); \
151 sigaction(SIGHUP, &(sv)[6], NULL); \
152 sigprocmask(SIG_SETMASK, &sm, NULL); \
153 } while (0)
154# endif /* SAVESIGVEC */
155
156extern int alrmcatch_disabled;
157extern int pchild_disabled;
158extern int phup_disabled;
159extern int pintr_disabled;
160
161extern void sigset_interrupting(int, void (*) (int));
162extern void handle_pending_signals(void);
163
164extern void queue_alrmcatch(int);
165extern void queue_pchild(int);
166extern void queue_phup(int);
167extern void queue_pintr(int);
168
169extern void disabled_cleanup(void *);
170extern void pintr_disabled_restore(void *);
171extern void pintr_push_enable(int *);
172
173#endif /* _h_tc_sig */