diff options
Diffstat (limited to '20120831/sigcompat.c')
| -rw-r--r-- | 20120831/sigcompat.c | 325 |
1 files changed, 0 insertions, 325 deletions
diff --git a/20120831/sigcompat.c b/20120831/sigcompat.c deleted file mode 100644 index 608538d..0000000 --- a/20120831/sigcompat.c +++ /dev/null @@ -1,325 +0,0 @@ -/* - * NAME: - * sigcompat - BSD compat signals via POSIX - * - * SYNOPSIS: - * void (*signal(int "sig", void (*"handler")(int)))(int); - * int sigsetmask(int "mask"); - * int sigblock(int "mask"); - * int sigpause(int "mask"); - * int sigvec(int "signo", struct sigvec *"sv", struct sigvec *"osv"); - * - * DESCRIPTION: - * These implement the old BSD routines via the POSIX equivalents. - * This module can be used to provide the missing routines, or if - * 'FORCE_POSIX_SIGNALS' is defined, force use of these. - * - * Note that signal() is identical to my Signal() routine except - * for checking for recursion. Within libsig, signal() just - * calls Signal(). - * - * BUGS: - * This package assumes POSIX signal handling is available and - * NOT implemeneted using these routines. To be safe, we check - * for recursion and abort(3) if detected. - * - * Sadly, on some systems, sigset_t is an array, and we cannot - * test for this via #if sizeof(sigset_t) ..., so unless - * 'SIGSET_T_INT' is defined, we have to assume the worst and use - * memcpy(3) to handle args and return values. - * - * HISTORY: - * These routines originate from BSD, and are derrived from the - * NetBSD 1.1 implementation. They have been seriously hacked to - * make them portable to other systems. - * - * AUTHOR: - * Simon J. Gerraty <sjg@crufty.net> - */ -/* - * @(#)Copyright (c) 1994, Simon J. Gerraty. - * - * This is free software. It comes with NO WARRANTY. - * Permission to use, modify and distribute this source code - * is granted subject to the following conditions. - * 1/ that the above copyright notice and this notice - * are preserved in all copies and that due credit be given - * to the author. - * 2/ that any changes to this code are clearly commented - * as such so that the author does not get blamed for bugs - * other than his own. - * - * Please send copies of changes and bug-fixes to: - * sjg@crufty.net - */ - -/* - * Copyright (c) 1989 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. - */ -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif -#include <signal.h> -#ifdef HAVE_UNISTD_H -#include <unistd.h> -#endif - -#if defined(sun) && !(defined(__svr4__) || defined(__SVR4)) -# define NO_SIGCOMPAT -#endif -#if defined(__MINT__) -# define NO_SIGCOMPAT -#endif - -#if !defined(NO_SIGCOMPAT) && (defined(HAVE_SIGACTION) || defined(SA_NOCLDSTOP)) - -#if defined(LIBC_SCCS) && !defined(lint) -/*static char *sccsid = "from: @(#)sigcompat.c 5.3 (Berkeley) 2/24/91";*/ -static char *rcsid = "$Id: sigcompat.c,v 1.23 2011/02/14 00:07:11 sjg Exp $"; -#endif /* LIBC_SCCS and not lint */ - -#undef signal -#include <stdio.h> -#include <string.h> -#include <sys/param.h> -#include <sys/cdefs.h> -#include "assert.h" - -#ifndef ASSERT -# define ASSERT assert -#endif - -#ifdef NDEBUG -# define _DBUG(x) -#else -# define _DBUG(x) x -#endif - -#ifndef SA_RESTART -# define SA_RESTART 2 -#endif -#ifndef SV_INTERRUPT -# define SV_INTERRUPT SA_RESTART -#endif - -#ifndef MASK_T -# if defined(__hpux__) || defined(__hpux) -# define MASK_T long -# else -# define MASK_T int -# endif -#endif -/* I just hate HPsUX */ -#if (defined(__HPUX_VERSION) && __HPUX_VERSION > 9) || defined(__hpux) -# define PAUSE_MASK_T int -#else -# define PAUSE_MASK_T MASK_T -#endif - -#ifndef SIG_HDLR -# define SIG_HDLR void -#endif - -#ifdef FORCE_POSIX_SIGNALS -#if !(defined(libsig) || defined(libsjg)) -/* - * This little block is almost identical to Signal(), - * and make this module standalone. - * We don't use it in libsig by default, as some apps might use both - * and expect _SignalFlags to be used by both. - */ - -#ifndef SIGNAL_FLAGS -# define SIGNAL_FLAGS 0 /* no auto-restart */ -#endif -int _signalFlags = SIGNAL_FLAGS; - -SIG_HDLR(*signal(int sig, SIG_HDLR(*handler)(int)))(int) -{ - _DBUG(static int depth_signal = 0); - struct sigaction act, oact; - int n; - - _DBUG(++depth_signal); - ASSERT(depth_signal < 2); - act.sa_handler = handler; - sigemptyset(&act.sa_mask); - act.sa_flags = _signalFlags; - n = sigaction(sig, &act, &oact); - _DBUG(--depth_signal); - if (n < 0) - return (SIG_ERR); - return (oact.sa_handler); -} -#else -SIG_HDLR(*signal(int sig, SIG_HDLR(*handler)(int)))(int) -{ - extern SIG_HDLR(*Signal(int, void (*)(int)))(int); - _DBUG(static int depth_signal = 0); - SIG_HDLR(*old) __P((int)); - - _DBUG(++depth_signal); - ASSERT(depth_signal < 2); - old = Signal(sig, handler); - _DBUG(--depth_signal); - return old; -} -#endif -#endif - -/* - * on some systems, sigset_t is an array... - * it would be nicer if we could do - * #if sizeof(sigset_t) > sizeof(MASK_T) - */ -#ifdef SIGSET_T_INT -# define ss2m(ss) (MASK_T) *(ss) -# define m2ss(ss, m) *ss = (sigset_t) *(m) -#else -static MASK_T -ss2m(sigset_t *ss) -{ - MASK_T ma[(sizeof(sigset_t) / sizeof(MASK_T)) + 1]; - - memcpy((char *) ma, (char *) ss, sizeof(sigset_t)); - return ma[0]; -} - -static void -m2ss(sigset_t *ss, MASK_T *m) -{ - if (sizeof(sigset_t) > sizeof(MASK_T)) - memset((char *) ss, 0, sizeof(sigset_t)); - - memcpy((char *) ss, (char *) m, sizeof(MASK_T)); -} -#endif - -#if !defined(HAVE_SIGSETMASK) || defined(FORCE_POSIX_SIGNALS) -MASK_T -sigsetmask(MASK_T mask) -{ - _DBUG(static int depth_sigsetmask = 0); - sigset_t m, omask; - int n; - - _DBUG(++depth_sigsetmask); - ASSERT(depth_sigsetmask < 2); - m2ss(&m, &mask); - n = sigprocmask(SIG_SETMASK, (sigset_t *) & m, (sigset_t *) & omask); - _DBUG(--depth_sigsetmask); - if (n) - return (n); - - return ss2m(&omask); -} - - -MASK_T -sigblock(MASK_T mask) -{ - _DBUG(static int depth_sigblock = 0); - sigset_t m, omask; - int n; - - _DBUG(++depth_sigblock); - ASSERT(depth_sigblock < 2); - if (mask) - m2ss(&m, &mask); - n = sigprocmask(SIG_BLOCK, (sigset_t *) ((mask) ? &m : 0), (sigset_t *) & omask); - _DBUG(--depth_sigblock); - if (n) - return (n); - return ss2m(&omask); -} - -#undef sigpause /* Linux at least */ - -PAUSE_MASK_T -sigpause(PAUSE_MASK_T mask) -{ - _DBUG(static int depth_sigpause = 0); - sigset_t m; - PAUSE_MASK_T n; - - _DBUG(++depth_sigpause); - ASSERT(depth_sigpause < 2); - m2ss(&m, &mask); - n = sigsuspend(&m); - _DBUG(--depth_sigpause); - return n; -} -#endif - -#if defined(HAVE_SIGVEC) && defined(FORCE_POSIX_SIGNALS) -int -sigvec(int signo, struct sigvec *sv, struct sigvec *osv) -{ - _DBUG(static int depth_sigvec = 0); - int ret; - struct sigvec nsv; - - _DBUG(++depth_sigvec); - ASSERT(depth_sigvec < 2); - if (sv) { - nsv = *sv; - nsv.sv_flags ^= SV_INTERRUPT; /* !SA_INTERRUPT */ - } - ret = sigaction(signo, sv ? (struct sigaction *) & nsv : NULL, - (struct sigaction *) osv); - _DBUG(--depth_sigvec); - if (ret == 0 && osv) - osv->sv_flags ^= SV_INTERRUPT; /* !SA_INTERRUPT */ - return (ret); -} -#endif - -#ifdef MAIN -# ifndef sigmask -# define sigmask(n) ((unsigned int)1 << (((n) - 1) & (32 - 1))) -# endif - -int -main(int argc, char *argv[]) -{ - MASK_T old = 0; - - printf("expect: old=0,old=2\n"); - fflush(stdout); - signal(SIGQUIT, SIG_IGN); - old = sigblock(sigmask(SIGINT)); - printf("old=%d,", old); - old = sigsetmask(sigmask(SIGALRM)); - printf("old=%d\n", old); -} -#endif -#endif |
