tc.sig.h revision 167465
1181834Sroberto/* $Header: /p/tcsh/cvsroot/tcsh/tc.sig.h,v 3.32 2006/03/11 15:32:00 mitr Exp $ */
2181834Sroberto/*
3181834Sroberto * tc.sig.h: Signal handling
4181834Sroberto *
5181834Sroberto */
6181834Sroberto/*-
7181834Sroberto * Copyright (c) 1980, 1991 The Regents of the University of California.
8181834Sroberto * All rights reserved.
9181834Sroberto *
10181834Sroberto * Redistribution and use in source and binary forms, with or without
11181834Sroberto * modification, are permitted provided that the following conditions
12181834Sroberto * are met:
13181834Sroberto * 1. Redistributions of source code must retain the above copyright
14285612Sdelphij *    notice, this list of conditions and the following disclaimer.
15285612Sdelphij * 2. Redistributions in binary form must reproduce the above copyright
16285612Sdelphij *    notice, this list of conditions and the following disclaimer in the
17181834Sroberto *    documentation and/or other materials provided with the distribution.
18181834Sroberto * 3. Neither the name of the University nor the names of its contributors
19181834Sroberto *    may be used to endorse or promote products derived from this software
20181834Sroberto *    without specific prior written permission.
21181834Sroberto *
22181834Sroberto * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23181834Sroberto * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24181834Sroberto * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25181834Sroberto * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26181834Sroberto * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27181834Sroberto * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28181834Sroberto * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29181834Sroberto * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30181834Sroberto * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31181834Sroberto * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32181834Sroberto * SUCH DAMAGE.
33181834Sroberto */
34181834Sroberto#ifndef _h_tc_sig
35181834Sroberto#define _h_tc_sig
36181834Sroberto
37181834Sroberto#if (SYSVREL > 0) || defined(BSD4_4) || defined(_MINIX) || defined(DGUX) || defined(WINNT_NATIVE)
38181834Sroberto# include <signal.h>
39181834Sroberto# ifndef SIGCHLD
40181834Sroberto#  define SIGCHLD SIGCLD
41181834Sroberto# endif /* SIGCHLD */
42181834Sroberto#else /* SYSVREL == 0 */
43181834Sroberto# include <sys/signal.h>
44181834Sroberto#endif /* SYSVREL > 0 */
45181834Sroberto
46181834Sroberto#if defined(__APPLE__) || defined(SUNOS4) || defined(DGUX) || defined(hp800) || (SYSVREL > 3 && defined(VFORK))
47181834Sroberto# define SAVESIGVEC
48181834Sroberto#endif /* SUNOS4 || DGUX || hp800 || SVR4 & VFORK */
49181834Sroberto
50181834Sroberto#if SYSVREL > 0
51181834Sroberto# ifdef BSDJOBS
52181834Sroberto/* here I assume that systems that have bsdjobs implement the
53181834Sroberto * the setpgrp call correctly. Otherwise defining this would
54181834Sroberto * work, but it would kill the world, because all the setpgrp
55181834Sroberto * code is the the part defined when BSDJOBS are defined
56181834Sroberto * NOTE: we don't want killpg(a, b) == kill(-getpgrp(a), b)
57181834Sroberto * cause process a might be already dead and getpgrp would fail
58181834Sroberto */
59181834Sroberto#  define killpg(a, b) kill(-(a), (b))
60181834Sroberto# else
61285612Sdelphij/* 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 */
174