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- /* $Header: /home/hyperion/mu/christos/src/sys/tcsh-6.01/RCS/tc.sig.h,v 3.5 1991/11/26 04:41:23 christos Exp $ */
- /*
- * tc.sig.h: Signal handling
- *
- */
- /*-
- * Copyright (c) 1980, 1991 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- #ifndef _h_tc_sig
- #define _h_tc_sig
-
- #if (SVID > 0) || defined(BSD4_4)
- # include <signal.h>
- # ifndef SIGCHLD
- # define SIGCHLD SIGCLD
- # endif /* SIGCHLD */
- #else /* SVID == 0 */
- # include <sys/signal.h>
- #endif /* SVID > 0 */
-
- #ifdef sun
- # define SAVESIGVEC
- #endif
-
- #if SVID > 0 && SVID < 3 && !defined(BSDSIGS)
- /*
- * If we have unreliable signals...
- */
- # define UNRELSIG
- #endif /* SVID > 0 && SVID < 3 && !BSDSIGS */
-
- #ifdef BSDSIGS
- /*
- * sigvec is not the same everywhere
- */
- # if defined(_SEQUENT_) || (defined(_POSIX_SOURCE) && !defined(hpux))
- # define HAVE_SIGVEC
- # define mysigvec(a, b, c) sigaction(a, b, c)
- typedef struct sigaction sigvec_t;
- # define sv_handler sa_handler
- # define sv_flags sa_flags
- # endif /* _SEQUENT || (_POSIX_SOURCE && !hpux) */
-
- # ifdef hpux
- # define HAVE_SIGVEC
- # define mysigvec(a, b, c) sigvector(a, b, c)
- typedef struct sigvec sigvec_t;
- # define NEEDsignal
- # endif /* hpux */
-
- # ifndef HAVE_SIGVEC
- # define mysigvec(a, b, c) sigvec(a, b, c)
- typedef struct sigvec sigvec_t;
- # endif /* HAVE_SIGVEC */
-
- # undef HAVE_SIGVEC
- #endif /* BSDSIGS */
-
- #if SVID > 0
- # ifdef BSDJOBS
- /* here I assume that systems that have bsdjobs implement the
- * the setpgrp call correctly. Otherwise defining this would
- * work, but it would kill the world, because all the setpgrp
- * code is the the part defined when BSDJOBS are defined
- * NOTE: we don't want killpg(a, b) == kill(-getpgrp(a), b)
- * cause process a might be already dead and getpgrp would fail
- */
- # define killpg(a, b) kill(-(a), (b))
- # else
- /* this is the poor man's version of killpg()! Just kill the
- * current process and don't worry about the rest. Someday
- * I hope I get to fix that.
- */
- # define killpg(a, b) kill((a), (b))
- # endif /* BSDJOBS */
- #endif /* SVID > 0 */
-
- #ifdef _MINIX
- #include <signal.h>
- # define killpg(a, b) kill((a), (b))
- #endif /* _MINIX */
-
- #ifdef BSDSIGS
- /*
- * For 4.2bsd signals.
- */
- # ifdef sigmask
- # undef sigmask
- # endif /* sigmask */
- # define sigmask(s) (1 << ((s)-1))
- # ifdef _SEQUENT_
- # define sigpause(a) bsd_sigpause(a)
- # define signal(a, b) sigset(a, b)
- # else /* _SEQUENT_ */
- # define sighold(s) sigblock(sigmask(s))
- # define sigignore(s) signal(s, SIG_IGN)
- # define sigset(s, a) signal(s, a)
- # endif /* _SEQUENT_ */
- # ifdef aiws
- # define sigrelse(a) sigsetmask(sigblock(0) & ~sigmask(a))
- # undef killpg
- # define killpg(a, b) kill(-getpgrp(a), b)
- # define NEEDsignal
- # endif /* aiws */
- #endif /* BSDSIGS */
-
-
- /*
- * We choose a define for the window signal if it exists..
- */
- #ifdef SIGWINCH
- # define SIG_WINDOW SIGWINCH
- #else
- # ifdef SIGWINDOW
- # define SIG_WINDOW SIGWINDOW
- # endif /* SIGWINDOW */
- #endif /* SIGWINCH */
-
- #if defined(convex) || defined(__convex__)
- # ifdef notdef
- /* Does not seem to work right... Christos */
- # define SIGSYNCH 0
- # endif
- # ifdef SIGSYNCH
- # define SYNCHMASK (sigmask(SIGCHLD)|sigmask(SIGSYNCH))
- # else
- # define SYNCHMASK (sigmask(SIGCHLD))
- # endif
- extern sigret_t synch_handler();
- #endif /* convex || __convex__ */
-
- #ifdef SAVESIGVEC
- # define NSIGSAVED 7
- /*
- * These are not inline for speed. gcc -traditional -O on the sparc ignores
- * the fact that vfork() corrupts the registers. Calling a routine is not
- * nice, since it can make the compiler put some things that we want saved
- * into registers - christos
- */
- # define savesigvec(sv) \
- (mysigvec(SIGINT, (sigvec_t *) 0, &(sv)[0]), \
- mysigvec(SIGQUIT, (sigvec_t *) 0, &(sv)[1]), \
- mysigvec(SIGTSTP, (sigvec_t *) 0, &(sv)[2]), \
- mysigvec(SIGTTIN, (sigvec_t *) 0, &(sv)[3]), \
- mysigvec(SIGTTOU, (sigvec_t *) 0, &(sv)[4]), \
- mysigvec(SIGTERM, (sigvec_t *) 0, &(sv)[5]), \
- mysigvec(SIGHUP, (sigvec_t *) 0, &(sv)[6]), \
- sigblock(sigmask(SIGINT) | sigmask(SIGQUIT) | \
- sigmask(SIGTSTP) | sigmask(SIGTTIN) | \
- sigmask(SIGTTOU) | sigmask(SIGTERM) | \
- sigmask(SIGHUP)))
-
- # define restoresigvec(sv, sm) \
- (void) (mysigvec(SIGINT, &(sv)[0], (sigvec_t *) 0), \
- mysigvec(SIGQUIT, &(sv)[1], (sigvec_t *) 0), \
- mysigvec(SIGTSTP, &(sv)[2], (sigvec_t *) 0), \
- mysigvec(SIGTTIN, &(sv)[3], (sigvec_t *) 0), \
- mysigvec(SIGTTOU, &(sv)[4], (sigvec_t *) 0), \
- mysigvec(SIGTERM, &(sv)[5], (sigvec_t *) 0), \
- mysigvec(SIGHUP, &(sv)[6], (sigvec_t *) 0), \
- sigsetmask(sm))
- # endif /* SAVESIGVEC */
-
- #endif /* _h_tc_sig */
-