1 /* $Header: /p/tcsh/cvsroot/tcsh/tc.sig.h,v 3.33 2007/07/05 14:13:06 christos Exp $ */
3 * tc.sig.h: Signal handling
7 * Copyright (c) 1980, 1991 The Regents of the University of California.
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11 * modification, are permitted provided that the following conditions
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.
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
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37 #if (SYSVREL > 0) || defined(BSD4_4) || defined(_MINIX) || defined(DGUX) || defined(WINNT_NATIVE) || defined(__QNXNTO__)
40 # define SIGCHLD SIGCLD
42 #else /* SYSVREL == 0 */
43 # include <sys/signal.h>
44 #endif /* SYSVREL > 0 */
46 #if defined(__APPLE__) || defined(SUNOS4) || defined(DGUX) || defined(hp800) || (SYSVREL > 3 && defined(VFORK))
48 #endif /* SUNOS4 || DGUX || hp800 || SVR4 & VFORK */
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
59 # define killpg(a, b) kill(-(a), (b))
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.
65 # define killpg(a, b) kill((a), (b))
67 #endif /* SYSVREL > 0 */
71 # define killpg(a, b) kill((a), (b))
73 # define signal(a, b) signal((a), (a) == SIGCHLD ? SIG_IGN : (b))
74 # endif /* _MINIX_VMD */
78 # define killpg(a, b) kill(-(a), (b))
79 #endif /* atp _VMS_POSIX */
83 # define killpg(a, b) kill(-getpgrp(a), b)
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)
94 #endif /* !NSIG && _NSIG */
96 #define NSIG (sizeof(sigset_t) * 8)
98 #if !defined(MAXSIG) && defined(NSIG)
100 #endif /* !MAXSIG && NSIG */
103 * We choose a define for the window signal if it exists..
106 # define SIG_WINDOW SIGWINCH
109 # define SIG_WINDOW SIGWINDOW
110 # endif /* SIGWINDOW */
111 #endif /* SIGWINCH */
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
121 # define savesigvec(sv, sm) \
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]); \
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); \
143 # define restoresigvec(sv, sm) \
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); \
154 # endif /* SAVESIGVEC */
156 extern int alrmcatch_disabled;
157 extern int pchild_disabled;
158 extern int phup_disabled;
159 extern int pintr_disabled;
161 extern void sigset_interrupting(int, void (*) (int));
162 extern void handle_pending_signals(void);
164 extern void queue_alrmcatch(int);
165 extern void queue_pchild(int);
166 extern void queue_phup(int);
167 extern void queue_pintr(int);
169 extern void disabled_cleanup(void *);
170 extern void pintr_disabled_restore(void *);
171 extern void pintr_push_enable(int *);
173 #endif /* _h_tc_sig */