diff options
Diffstat (limited to 'contrib/bind/bin/named/ns_signal.c')
| -rw-r--r-- | contrib/bind/bin/named/ns_signal.c | 297 |
1 files changed, 0 insertions, 297 deletions
diff --git a/contrib/bind/bin/named/ns_signal.c b/contrib/bind/bin/named/ns_signal.c deleted file mode 100644 index a8a957d..0000000 --- a/contrib/bind/bin/named/ns_signal.c +++ /dev/null @@ -1,297 +0,0 @@ -#if !defined(lint) && !defined(SABER) -static const char sccsid[] = "@(#)ns_main.c 4.55 (Berkeley) 7/1/91"; -static const char rcsid[] = "$Id: ns_signal.c,v 8.15 2002/05/18 01:39:15 marka Exp $"; -#endif /* not lint */ - -/* - * Copyright (c) 1986, 1989, 1990 - * 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. - */ - -/* - * Portions Copyright (c) 1993 by Digital Equipment Corporation. - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies, and that - * the name of Digital Equipment Corporation not be used in advertising or - * publicity pertaining to distribution of the document or software without - * specific, written prior permission. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL - * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT - * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL - * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR - * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS - * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS - * SOFTWARE. - */ - -/* - * Portions Copyright (c) 1996-2000 by Internet Software Consortium. - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS - * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE - * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL - * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR - * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS - * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS - * SOFTWARE. - */ - -/* Import. */ - -#include "port_before.h" - -#include <sys/types.h> -#include <sys/param.h> -#include <sys/file.h> -#include <sys/stat.h> -#include <sys/wait.h> -#include <sys/ioctl.h> -#include <sys/socket.h> -#ifdef SVR4 /* XXX */ -# include <sys/sockio.h> -#else -#ifndef __hpux -# include <sys/mbuf.h> -#endif -#endif - -#include <netinet/in.h> -#include <net/route.h> -#include <net/if.h> -#include <arpa/nameser.h> -#include <arpa/inet.h> - -#include <ctype.h> -#include <errno.h> -#include <fcntl.h> -#include <grp.h> -#include <stdio.h> -#include <stdlib.h> -#include <signal.h> -#include <netdb.h> -#include <pwd.h> -#include <resolv.h> -#include <string.h> -#include <syslog.h> -#include <time.h> -#include <unistd.h> - -#include <isc/eventlib.h> -#include <isc/logging.h> -#include <isc/memcluster.h> -#include <isc/list.h> - -#include "port_after.h" -#include "named.h" - -/* Forward. */ - -static SIG_FN onhup(int); -static SIG_FN onintr(int); -static SIG_FN setdumpflg(int); -static SIG_FN setIncrDbgFlg(int); -static SIG_FN setNoDbgFlg(int); -static SIG_FN setQrylogFlg(int); -static SIG_FN setstatsflg(int); -static SIG_FN discard_pipe(int); -static SIG_FN setreapflg(int); - -/* Data. */ - -static struct { - int sig; - SIG_FN (*hand)(int); -} sighandlers[] = { -#ifdef DEBUG - { SIGUSR1, setIncrDbgFlg }, - { SIGUSR2, setNoDbgFlg }, -#endif -#if defined(SIGWINCH) && defined(QRYLOG) - { SIGWINCH, setQrylogFlg }, -#endif -#if defined(SIGXFSZ) - { SIGXFSZ, onhup }, /* Wierd DEC Hesiodism, harmless. */ -#endif - { SIGINT, setdumpflg }, - { SIGILL, setstatsflg }, - { SIGHUP, onhup }, - { SIGCHLD, setreapflg }, - { SIGPIPE, discard_pipe }, - { SIGTERM, onintr } -}; - -static sigset_t mask; -static int blocked = 0; - -/* Private. */ - -static SIG_FN -onhup(int sig) { - - UNUSED(sig); - - ns_need_unsafe(main_need_reload); -} - -static SIG_FN -onintr(int sig) { - - UNUSED(sig); - - ns_need_unsafe(main_need_exit); -} - -static SIG_FN -setdumpflg(int sig) { - - UNUSED(sig); - - ns_need_unsafe(main_need_dump); -} - -#ifdef DEBUG -static SIG_FN -setIncrDbgFlg(int sig) { - - UNUSED(sig); - - desired_debug++; - ns_need_unsafe(main_need_debug); -} - -static SIG_FN -setNoDbgFlg(int sig) { - - UNUSED(sig); - - desired_debug = 0; - ns_need_unsafe(main_need_debug); -} -#endif /*DEBUG*/ - -#if defined(QRYLOG) && defined(SIGWINCH) -static SIG_FN -setQrylogFlg(int sig) { - - UNUSED(sig); - - ns_need_unsafe(main_need_qrylog); -} -#endif /*QRYLOG && SIGWINCH*/ - -static SIG_FN -setstatsflg(int sig) { - - UNUSED(sig); - - ns_need_unsafe(main_need_statsdump); -} - -static SIG_FN -discard_pipe(int sig) { -#ifdef SIGPIPE_ONE_SHOT - int saved_errno = errno; - struct sigaction sa; - - UNUSED(sig); - - memset(&sa, 0, sizeof sa); - sa.sa_mask = mask; - sa.sa_handler = discard_pipe; - if (sigaction(SIGPIPE, &sa, NULL) < 0) - ns_error(ns_log_os, "sigaction failed in discard_pipe: %s", - strerror(errno)); - errno = saved_errno; -#else - UNUSED(sig); -#endif -} - -static SIG_FN -setreapflg(int sig) { - - UNUSED(sig); - - ns_need_unsafe(main_need_reap); -} - -/* Public. */ - -void -init_signals(void) { - size_t sh; - - /* The mask of all our handlers will block all our other handlers. */ - (void)sigemptyset(&mask); - for (sh = 0; sh < sizeof sighandlers / sizeof sighandlers[0]; sh++) - sigaddset(&mask, sighandlers[sh].sig); - - /* Install our signal handlers with that shared mask. */ - for (sh = 0; sh < sizeof sighandlers / sizeof sighandlers[0]; sh++) { - struct sigaction sa; - - memset(&sa, 0, sizeof sa); - sa.sa_mask = mask; - sa.sa_handler = sighandlers[sh].hand; - if (sigaction(sighandlers[sh].sig, &sa, NULL) < 0) - ns_error(ns_log_os, - "sigaction failed in set_signal_handler(%d): %s", - sighandlers[sh].sig, strerror(errno)); - } - /* Unblock all signals that we expect to handle. */ - if (sigprocmask(SIG_UNBLOCK, &mask, NULL) < 0) - ns_panic(ns_log_os, 1, "sigblock failed: %s", strerror(errno)); -} - -void -block_signals(void) { - INSIST(!blocked); - if (sigprocmask(SIG_BLOCK, &mask, NULL) < 0) - ns_panic(ns_log_os, 1, "sigblock failed: %s", strerror(errno)); - blocked = 1; -} - -void -unblock_signals(void) { - INSIST(blocked); - if (sigprocmask(SIG_UNBLOCK, &mask, NULL) < 0) - ns_panic(ns_log_os, 1, "sigblock failed: %s", strerror(errno)); - blocked = 0; -} |
