contrib/tcsh-6/tc.sig.h

   1 /*
   2  * tc.sig.h: Signal handling
   3  *
   4  */
   5 /*-
   6  * Copyright (c) 1980, 1991 The Regents of the University of California.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33 #ifndef _h_tc_sig
  34 #define _h_tc_sig
  35
  36 #if (SYSVREL > 0) || defined(BSD4_4) || defined(_MINIX) || defined(DGUX) || defined(WINNT_NATIVE) || defined(__QNXNTO__)
  37 # include <signal.h>
  38 # ifndef SIGCHLD
  39 #  define SIGCHLD SIGCLD
  40 # endif /* SIGCHLD */
  41 #else /* SYSVREL == 0 */
  42 # include <sys/signal.h>
  43 #endif /* SYSVREL > 0 */
  44
  45 #if defined(SUNOS4) || defined(DGUX) || defined(hp800) || (SYSVREL > 3 && defined(VFORK))
  46 # define SAVESIGVEC
  47 #endif /* SUNOS4 || DGUX || hp800 || SVR4 & VFORK */
  48
  49 #if SYSVREL > 0
  50 # ifdef BSDJOBS
  51 /* here I assume that systems that have bsdjobs implement the
  52  * the setpgrp call correctly. Otherwise defining this would
  53  * work, but it would kill the world, because all the setpgrp
  54  * code is the the part defined when BSDJOBS are defined
  55  * NOTE: we don't want killpg(a, b) == kill(-getpgrp(a), b)
  56  * cause process a might be already dead and getpgrp would fail
  57  */
  58 #  define killpg(a, b) kill(-(a), (b))
  59 # else
  60 /* this is the poor man's version of killpg()! Just kill the
  61  * current process and don't worry about the rest. Someday
  62  * I hope I get to fix that.
  63  */
  64 #  define killpg(a, b) kill((a), (b))
  65 # endif /* BSDJOBS */
  66 #endif /* SYSVREL > 0 */
  67
  68 #ifdef _MINIX
  69 # include <signal.h>
  70 # define killpg(a, b) kill((a), (b))
  71 # ifdef _MINIX_VMD
  72 #  define signal(a, b) signal((a), (a) == SIGCHLD ? SIG_IGN : (b))
  73 # endif /* _MINIX_VMD */
  74 #endif /* _MINIX */
  75
  76 #ifdef _VMS_POSIX
  77 # define killpg(a, b) kill(-(a), (b))
  78 #endif /* atp _VMS_POSIX */
  79
  80 #ifdef aiws
  81 # undef killpg
  82 # define        killpg(a, b)    kill(-getpgrp(a), b)
  83 #endif /* aiws */
  84
  85 #if !defined(NSIG) && defined(SIGMAX)
  86 # define NSIG (SIGMAX+1)
  87 #endif /* !NSIG && SIGMAX */
  88 #if !defined(NSIG) && defined(_SIG_MAX)
  89 # define NSIG (_SIG_MAX+1)
  90 #endif /* !NSIG && _SIG_MAX */
  91 #if !defined(NSIG) && defined(_NSIG)
  92 # define NSIG _NSIG
  93 #endif /* !NSIG && _NSIG */
  94 #if !defined(NSIG)
  95 #define NSIG (sizeof(sigset_t) * 8)
  96 #endif /* !NSIG */
  97 #if !defined(MAXSIG) && defined(NSIG)
  98 # define MAXSIG NSIG
  99 #endif /* !MAXSIG && NSIG */
 100
 101 /*
 102  * We choose a define for the window signal if it exists..
 103  */
 104 #ifdef SIGWINCH
 105 # define SIG_WINDOW SIGWINCH
 106 #else
 107 # ifdef SIGWINDOW
 108 #  define SIG_WINDOW SIGWINDOW
 109 # endif /* SIGWINDOW */
 110 #endif /* SIGWINCH */
 111
 112 #ifdef SAVESIGVEC
 113 # define NSIGSAVED 7
 114  /*
 115   * These are not inline for speed. gcc -traditional -O on the sparc ignores
 116   * the fact that vfork() corrupts the registers. Calling a routine is not
 117   * nice, since it can make the compiler put some things that we want saved
 118   * into registers                              - christos
 119   */
 120 # define savesigvec(sv, sm)                     \
 121     do {                                        \
 122         sigset_t m__;                           \
 123                                                 \
 124         sigaction(SIGINT,  NULL, &(sv)[0]);     \
 125         sigaction(SIGQUIT, NULL, &(sv)[1]);     \
 126         sigaction(SIGTSTP, NULL, &(sv)[2]);     \
 127         sigaction(SIGTTIN, NULL, &(sv)[3]);     \
 128         sigaction(SIGTTOU, NULL, &(sv)[4]);     \
 129         sigaction(SIGTERM, NULL, &(sv)[5]);     \
 130         sigaction(SIGHUP,  NULL, &(sv)[6]);     \
 131         sigemptyset(&m__);                      \
 132         sigaddset(&m__, SIGINT);                \
 133         sigaddset(&m__, SIGQUIT);               \
 134         sigaddset(&m__, SIGTSTP);               \
 135         sigaddset(&m__, SIGTTIN);               \
 136         sigaddset(&m__, SIGTTOU);               \
 137         sigaddset(&m__, SIGTERM);               \
 138         sigaddset(&m__, SIGHUP);                \
 139         sigprocmask(SIG_BLOCK, &m__, &sm);      \
 140     } while (0)
 141
 142 # define restoresigvec(sv, sm)                  \
 143     do {                                        \
 144         sigaction(SIGINT,  &(sv)[0], NULL);     \
 145         sigaction(SIGQUIT, &(sv)[1], NULL);     \
 146         sigaction(SIGTSTP, &(sv)[2], NULL);     \
 147         sigaction(SIGTTIN, &(sv)[3], NULL);     \
 148         sigaction(SIGTTOU, &(sv)[4], NULL);     \
 149         sigaction(SIGTERM, &(sv)[5], NULL);     \
 150         sigaction(SIGHUP,  &(sv)[6], NULL);     \
 151         sigprocmask(SIG_SETMASK, &sm, NULL);    \
 152     } while (0)
 153 # endif /* SAVESIGVEC */
 154
 155 extern int alrmcatch_disabled;
 156 extern int pchild_disabled;
 157 extern int phup_disabled;
 158 extern int pintr_disabled;
 159
 160 extern void sigset_interrupting(int, void (*) (int));
 161 extern int handle_pending_signals(void);
 162
 163 extern void queue_alrmcatch(int);
 164 extern void queue_pchild(int);
 165 extern void queue_phup(int);
 166 extern void queue_pintr(int);
 167
 168 extern void disabled_cleanup(void *);
 169 extern void pintr_disabled_restore(void *);
 170 extern void pintr_push_enable(int *);
 171
 172 #endif /* _h_tc_sig */