Import the latest version of the 44BSD C-shell -- tcsh-6.09.vendor/tcsh/6.09

1 files changed, 226 insertions, 0 deletions

diff --git a/contrib/tcsh/tc.sig.h b/contrib/tcsh/tc.sig.h
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+/* $Header: /src/pub/tcsh/tc.sig.h,v 3.20 1998/04/08 17:57:37 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 (SYSVREL > 0) || defined(BSD4_4) || defined(_MINIX) || defined(DGUX) || defined(WINNT)
+# include <signal.h>
+# ifndef SIGCHLD
+#  define SIGCHLD SIGCLD
+# endif /* SIGCHLD */
+#else /* SYSVREL == 0 */
+# include <sys/signal.h>
+#endif /* SYSVREL > 0 */
+
+#if defined(SUNOS4) || defined(DGUX) || defined(hp800) || (SYSVREL > 3 && defined(POSIXSIGS) && defined(VFORK))
+# define SAVESIGVEC
+#endif /* SUNOS4 || DGUX || hp800 || SVR4 & POSIXSIGS & VFORK */
+
+#if (SYSVREL > 0 && SYSVREL < 3 && !defined(BSDSIGS)) || defined(_MINIX) || defined(COHERENT)
+/*
+ * If we have unreliable signals...
+ */
+# define UNRELSIGS
+#endif /* SYSVREL > 0 && SYSVREL < 3 && !BSDSIGS || _MINIX || COHERENT */
+
+#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;
+#  if defined(convex) || defined(__convex__)
+     /* eliminate compiler warnings since these are defined in signal.h  */
+#    undef sv_handler
+#    undef sv_flags
+#  endif
+#  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
+#  ifdef POSIXSIGS
+#  define mysigvec(a, b, c)	sigaction(a, b, c)
+typedef struct sigaction sigvec_t;
+#   define sv_handler sa_handler
+#   define sv_flags sa_flags
+#  else /* BSDSIGS */
+#  define mysigvec(a, b, c)	sigvec(a, b, c)
+typedef struct sigvec sigvec_t;
+#  endif /* POSIXSIGS */
+# endif /* HAVE_SIGVEC */
+
+# undef HAVE_SIGVEC
+#endif /* BSDSIGS */
+
+#if SYSVREL > 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 /* SYSVREL > 0 */
+
+#ifdef _MINIX
+# include <signal.h>
+#  define killpg(a, b) kill((a), (b))
+#endif /* _MINIX */
+
+#ifdef _VMS_POSIX
+# define killpg(a, b) kill(-(a), (b))
+#endif /* atp _VMS_POSIX */
+
+#if !defined(NSIG) && defined(SIGMAX)
+# define NSIG (SIGMAX+1)
+#endif /* !NSIG && SIGMAX */
+#if !defined(NSIG) && defined(_SIG_MAX)
+# define NSIG (_SIG_MAX+1)
+#endif /* !NSIG && _SIG_MAX */
+#if !defined(NSIG) && defined(_NSIG)
+# define NSIG _NSIG
+#endif /* !NSIG && _NSIG */
+#if !defined(MAXSIG) && defined(NSIG)
+# define MAXSIG NSIG
+#endif /* !MAXSIG && NSIG */
+
+#ifdef BSDSIGS
+/*
+ * For 4.2bsd signals.
+ */
+# ifdef sigmask
+#  undef sigmask
+# endif /* sigmask */
+# define	sigmask(s)	(1 << ((s)-1))
+# ifdef POSIXSIGS
+#  define 	sigpause(a)	(void) bsd_sigpause(a)
+#  ifdef WINNT
+#   undef signal
+#  endif /* WINNT */
+#  define 	signal(a, b)	bsd_signal(a, b)
+# endif /* POSIXSIGS */
+# ifndef _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 */
+
+#ifdef 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 */
+
+#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)						\
+   ((void) mysigvec(SIGINT,  (sigvec_t *) 0, &(sv)[0]),		\
+    (void) mysigvec(SIGQUIT, (sigvec_t *) 0, &(sv)[1]),		\
+    (void) mysigvec(SIGTSTP, (sigvec_t *) 0, &(sv)[2]),		\
+    (void) mysigvec(SIGTTIN, (sigvec_t *) 0, &(sv)[3]),		\
+    (void) mysigvec(SIGTTOU, (sigvec_t *) 0, &(sv)[4]),		\
+    (void) mysigvec(SIGTERM, (sigvec_t *) 0, &(sv)[5]),		\
+    (void) 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) ((void) mysigvec(SIGINT,  &(sv)[0], (sigvec_t *) 0),	\
+	    (void) mysigvec(SIGQUIT, &(sv)[1], (sigvec_t *) 0),	\
+	    (void) mysigvec(SIGTSTP, &(sv)[2], (sigvec_t *) 0),	\
+	    (void) mysigvec(SIGTTIN, &(sv)[3], (sigvec_t *) 0),	\
+	    (void) mysigvec(SIGTTOU, &(sv)[4], (sigvec_t *) 0),	\
+	    (void) mysigvec(SIGTERM, &(sv)[5], (sigvec_t *) 0),	\
+	    (void) mysigvec(SIGHUP,  &(sv)[6], (sigvec_t *) 0),	\
+	    (void) sigsetmask(sm))
+# endif /* SAVESIGVEC */
+
+#endif /* _h_tc_sig */