contrib/tcsh-6/tc.sig.h

   1 /* $Header: /p/tcsh/cvsroot/tcsh/tc.sig.h,v 3.32 2006/03/11 15:32:00 mitr 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(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
 156 extern int alrmcatch_disabled;
 157 extern int pchild_disabled;
 158 extern int phup_disabled;
 159 extern int pintr_disabled;
 160
 161 extern void sigset_interrupting(int, void (*) (int));
 162 extern void handle_pending_signals(void);
 163
 164 extern void queue_alrmcatch(int);
 165 extern void queue_pchild(int);
 166 extern void queue_phup(int);
 167 extern void queue_pintr(int);
 168
 169 extern void disabled_cleanup(void *);
 170 extern void pintr_disabled_restore(void *);
 171 extern void pintr_push_enable(int *);
 172
 173 #endif /* _h_tc_sig */