| 1 |
/* |
| 2 |
* Hydra, an http server |
| 3 |
* Copyright (C) 1995 Paul Phillips <paulp@go2net.com> |
| 4 |
* Some changes Copyright (C) 1996 Larry Doolittle <ldoolitt@boa.org> |
| 5 |
* Some changes Copyright (C) 1996-99 Jon Nelson <jnelson@boa.org> |
| 6 |
* Some changes Copyright (C) 1997 Alain Magloire <alain.magloire@rcsm.ee.mcgill.ca> |
| 7 |
* Portions Copyright (C) 2002 Nikos Mavroyanopoulos <nmav@gnutls.org> |
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* |
| 9 |
* This program is free software; you can redistribute it and/or modify |
| 10 |
* it under the terms of the GNU General Public License as published by |
| 11 |
* the Free Software Foundation; either version 1, or (at your option) |
| 12 |
* any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
| 15 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 |
* GNU General Public License for more details. |
| 18 |
* |
| 19 |
* You should have received a copy of the GNU General Public License |
| 20 |
* along with this program; if not, write to the Free Software |
| 21 |
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 22 |
* |
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*/ |
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|
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/* $Id: signals.c,v 1.19 2002/10/09 08:49:46 nmav Exp $*/ |
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|
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#include "boa.h" |
| 28 |
#ifdef HAVE_SYS_WAIT_H |
| 29 |
#include <sys/wait.h> /* wait */ |
| 30 |
#endif |
| 31 |
#include <signal.h> /* signal */ |
| 32 |
#include "ssl.h" |
| 33 |
|
| 34 |
#ifdef ENABLE_SMP |
| 35 |
extern pthread_t father_id; |
| 36 |
#endif |
| 37 |
|
| 38 |
void sigsegv(int); |
| 39 |
void sigbus(int); |
| 40 |
void sigterm(int); |
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void sighup(int); |
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void sigint(int); |
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void sigchld(int); |
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void sigalrm(int); |
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void sigusr1(int); |
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void sigusr2(int); /* needed in HIC thread */ |
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|
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/* |
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* Name: init_signals |
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* Description: Sets up signal handlers for all our friends. |
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*/ |
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|
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void init_signals(void) |
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{ |
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struct sigaction sa; |
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|
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sa.sa_flags = 0; |
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|
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sigemptyset(&sa.sa_mask); |
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sigaddset(&sa.sa_mask, SIGSEGV); |
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sigaddset(&sa.sa_mask, SIGBUS); |
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sigaddset(&sa.sa_mask, SIGTERM); |
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sigaddset(&sa.sa_mask, SIGHUP); |
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sigaddset(&sa.sa_mask, SIGINT); |
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sigaddset(&sa.sa_mask, SIGPIPE); |
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sigaddset(&sa.sa_mask, SIGCHLD); |
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sigaddset(&sa.sa_mask, SIGALRM); |
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sigaddset(&sa.sa_mask, SIGUSR1); |
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sigaddset(&sa.sa_mask, SIGUSR2); |
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|
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sa.sa_handler = sigsegv; |
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sigaction(SIGSEGV, &sa, NULL); |
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|
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sa.sa_handler = sigbus; |
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sigaction(SIGBUS, &sa, NULL); |
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|
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sa.sa_handler = SIG_IGN; |
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sigaction(SIGPIPE, &sa, NULL); |
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|
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sa.sa_handler = sigchld; |
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sigaction(SIGCHLD, &sa, NULL); |
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|
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sa.sa_handler = sigterm; |
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sigaction(SIGTERM, &sa, NULL); |
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|
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sa.sa_handler = sighup; |
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sigaction(SIGHUP, &sa, NULL); |
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|
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sa.sa_handler = sigint; |
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sigaction(SIGINT, &sa, NULL); |
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|
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sa.sa_handler = sigalrm; |
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sigaction(SIGALRM, &sa, NULL); |
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|
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sa.sa_handler = sigusr1; |
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sigaction(SIGUSR1, &sa, NULL); |
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|
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sa.sa_handler = sigusr2; |
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sigaction(SIGUSR2, &sa, NULL); |
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} |
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|
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/* Blocks all signals that should be handled by |
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* the main thread, so that other threads are |
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* not annoyed. |
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*/ |
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void block_main_signals() |
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{ |
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sigset_t sigset; |
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|
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sigemptyset(&sigset); |
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sigaddset(&sigset, SIGALRM); |
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sigaddset(&sigset, SIGUSR1); |
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sigaddset(&sigset, SIGUSR2); |
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sigaddset(&sigset, SIGTERM); |
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sigaddset(&sigset, SIGINT); |
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|
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sigprocmask(SIG_BLOCK, &sigset, NULL); |
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} |
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|
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void unblock_main_signals() |
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{ |
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sigset_t sigset; |
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|
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sigemptyset(&sigset); |
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sigaddset(&sigset, SIGALRM); |
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sigaddset(&sigset, SIGUSR1); |
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sigaddset(&sigset, SIGUSR2); |
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sigaddset(&sigset, SIGTERM); |
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sigaddset(&sigset, SIGHUP); |
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sigaddset(&sigset, SIGINT); |
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|
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sigprocmask(SIG_UNBLOCK, &sigset, NULL); |
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} |
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|
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void block_sigusr2() |
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{ |
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sigset_t sigset; |
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|
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sigemptyset(&sigset); |
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sigaddset(&sigset, SIGUSR2); |
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|
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sigprocmask(SIG_BLOCK, &sigset, NULL); |
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} |
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|
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void unblock_sigusr2() |
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{ |
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sigset_t sigset; |
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|
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sigemptyset(&sigset); |
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sigaddset(&sigset, SIGUSR2); |
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|
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sigprocmask(SIG_UNBLOCK, &sigset, NULL); |
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} |
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|
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|
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void sigsegv(int dummy) |
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{ |
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time(¤t_time); |
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log_error_time(); |
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fprintf(stderr, "caught SIGSEGV, dumping core in %s\n", tempdir); |
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fclose(stderr); |
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chdir(tempdir); |
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abort(); |
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} |
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|
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void sigbus(int dummy) |
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{ |
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server_params *params = &global_server_params[0]; |
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|
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/* Note that in multithreaded cases the SIGBUS is catched |
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* by the same thread that did the violation. So the following |
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* code should be ok. |
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*/ |
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|
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#ifdef ENABLE_SMP |
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pthread_t tid = pthread_self(); |
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int i; |
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|
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for (i = 0; i < global_server_params_size; i++) { |
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if (pthread_equal(global_server_params[i].tid, tid)) { |
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params = &global_server_params[i]; |
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break; |
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} |
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} |
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#endif |
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|
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if (params->handle_sigbus) { |
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longjmp(params->env, dummy); |
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} |
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time(¤t_time); |
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log_error_time(); |
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fprintf(stderr, "caught SIGBUS, dumping core in %s\n", tempdir); |
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fclose(stderr); |
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chdir(tempdir); |
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abort(); |
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} |
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|
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#define SET_PTH_SIGFLAG( flag, val) \ |
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global_server_params[0].flag = val |
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|
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#ifdef ENABLE_SMP |
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# define _SET_LOCAL_PTH_SIGFLAG( flag, val) \ |
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{ pthread_t tid = pthread_self(); int i; int set = 0; \ |
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for (i=0;i<global_server_params_size;i++) { \ |
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if ( pthread_equal( global_server_params[i].tid, tid)) { \ |
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global_server_params[i].flag = val; \ |
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set = 1; \ |
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break; \ |
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} \ |
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} |
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|
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# ifdef ENABLE_HIC |
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# define SET_LOCAL_PTH_SIGFLAG( flag, val) \ |
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_SET_LOCAL_PTH_SIGFLAG( flag, val) \ |
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\ |
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if (!set) { /* try hic threads */ \ |
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for (i=0;i<global_hic_params_size;i++) { \ |
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if ( pthread_equal( global_hic_params[i].tid, tid)) { \ |
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global_hic_params[i].flag = val; \ |
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break; \ |
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} \ |
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} \ |
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} \ |
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} |
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# else |
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|
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# define SET_LOCAL_PTH_SIGFLAG( flag, val) \ |
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_SET_LOCAL_PTH_SIGFLAG( flag, val) } |
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|
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# endif |
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|
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#else |
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# define SET_LOCAL_PTH_SIGFLAG SET_PTH_SIGFLAG |
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#endif |
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|
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void sigterm(int dummy) |
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{ |
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SET_PTH_SIGFLAG(sigterm_flag, 1); |
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} |
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|
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|
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void sigterm_stage1_run() |
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{ /* lame duck mode */ |
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#ifdef ENABLE_SMP |
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int i; |
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#endif |
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|
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time(¤t_time); |
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log_error_time(); |
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fputs("caught SIGTERM, starting shutdown\n", stderr); |
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|
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#ifdef ENABLE_SMP |
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{ |
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int ret; |
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/* remember that the first thread is actual the main process. |
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*/ |
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for (i = 1; i < global_server_params_size; i++) { |
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/* terminate all threads */ |
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if ((ret = pthread_cancel(global_server_params[i].tid)) != 0) { |
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log_error_time(); |
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fprintf(stderr, "Could not cancel thread: %d. errno = %d.\n", |
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(int) global_server_params[i].tid, ret); |
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exit(1); |
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} |
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} |
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|
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# ifdef ENABLE_HIC |
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for (i = 0; i < global_hic_params_size; i++) { |
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if ((ret = pthread_cancel(global_hic_params[i].tid)) != 0) { |
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log_error_time(); |
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fprintf(stderr, "Could not cancel thread: %d. errno = %d.\n", |
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(int) global_hic_params[i].tid, ret); |
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exit(1); |
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} |
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} |
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# endif |
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} |
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#endif |
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|
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if (global_server_params[0].server_s[0].socket != -1) { |
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FD_CLR(global_server_params[0].server_s[0].socket, |
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&global_server_params[0].block_read_fdset); |
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close(global_server_params[0].server_s[0].socket); |
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} |
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|
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if (global_server_params[0].server_s[1].socket != -1) { |
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FD_CLR(global_server_params[0].server_s[1].socket, |
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&global_server_params[0].block_read_fdset); |
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close(global_server_params[0].server_s[1].socket); |
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} |
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|
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SET_PTH_SIGFLAG(sigterm_flag, 2); |
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} |
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|
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|
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void sigterm_stage2_run() |
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{ /* lame duck mode */ |
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int i; |
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|
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log_error_time(); |
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fprintf(stderr, |
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"exiting Hydra normally (uptime %d seconds)\n", |
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(int) (current_time - start_time)); |
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chdir(tempdir); |
| 305 |
clear_common_env(); |
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dump_mime(); |
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dump_passwd(); |
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dump_virthost(); |
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dump_directory_index(); |
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dump_hic_modules(); |
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|
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for (i = 0; i < global_server_params_size; i++) { |
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free_requests(&global_server_params[i]); |
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} |
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|
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exit(0); |
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} |
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|
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|
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void sighup(int dummy) |
| 321 |
{ |
| 322 |
SET_LOCAL_PTH_SIGFLAG(sighup_flag, 1); |
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} |
| 324 |
|
| 325 |
void sighup_run() |
| 326 |
{ |
| 327 |
int i; |
| 328 |
|
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/* In sighup case, the father frees all memory, and |
| 330 |
* the childen terminate. |
| 331 |
*/ |
| 332 |
|
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SET_LOCAL_PTH_SIGFLAG(sighup_flag, 0); |
| 334 |
|
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|
| 336 |
#ifdef ENABLE_SMP |
| 337 |
/* Kill all threads! */ |
| 338 |
if (pthread_self() == father_id) { |
| 339 |
int ret; |
| 340 |
|
| 341 |
time(¤t_time); |
| 342 |
log_error_time(); |
| 343 |
fputs("caught SIGHUP, restarting\n", stderr); |
| 344 |
|
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for (i = 1; i < global_server_params_size; i++) { |
| 346 |
if ((ret = pthread_kill(global_server_params[i].tid, SIGHUP)) != 0) { |
| 347 |
log_error_time(); |
| 348 |
fprintf(stderr, "Could not kill thread: %d. errno = %d.\n", |
| 349 |
(int) global_server_params[i].tid, ret); |
| 350 |
} else |
| 351 |
if ((ret=pthread_join( global_server_params[i].tid, NULL)) != 0) { |
| 352 |
log_error_time(); |
| 353 |
fprintf(stderr, "Could not join thread: %d. errno = %d.\n", |
| 354 |
(int) global_hic_params[i].tid, ret); |
| 355 |
} |
| 356 |
} |
| 357 |
log_error_time(); |
| 358 |
fputs("Terminated all the threads in the pool.\n", stderr); |
| 359 |
|
| 360 |
# ifdef ENABLE_HIC |
| 361 |
for (i = 0; i < global_hic_params_size; i++) { |
| 362 |
if ((ret = pthread_kill(global_hic_params[i].tid, SIGHUP)) != 0) { |
| 363 |
log_error_time(); |
| 364 |
fprintf(stderr, "Could not kill thread: %d. errno = %d.\n", |
| 365 |
(int) global_hic_params[i].tid, ret); |
| 366 |
} else |
| 367 |
/* wait too see it die */ |
| 368 |
if ((ret=pthread_join( global_hic_params[i].tid, NULL)) != 0) { |
| 369 |
log_error_time(); |
| 370 |
fprintf(stderr, "Could not join thread: %d. errno = %d.\n", |
| 371 |
(int) global_hic_params[i].tid, ret); |
| 372 |
} |
| 373 |
} |
| 374 |
|
| 375 |
log_error_time(); |
| 376 |
fputs("Terminated all the HIC threads.\n", stderr); |
| 377 |
# endif |
| 378 |
|
| 379 |
for (i = 0; i < global_server_params_size; i++) { |
| 380 |
free_requests(&global_server_params[i]); |
| 381 |
} |
| 382 |
|
| 383 |
#endif |
| 384 |
for (i = 0; i < global_server_params_size; i++) { |
| 385 |
FD_ZERO(&global_server_params[i].block_read_fdset); |
| 386 |
FD_ZERO(&global_server_params[i].block_write_fdset); |
| 387 |
} |
| 388 |
|
| 389 |
/* Philosophy change for 0.92: don't close and attempt reopen of logfiles, |
| 390 |
* since usual permission structure prevents such reopening. |
| 391 |
*/ |
| 392 |
|
| 393 |
/* clear_common_env(); NEVER DO THIS */ |
| 394 |
dump_mime(); |
| 395 |
dump_passwd(); |
| 396 |
dump_virthost(); |
| 397 |
dump_directory_index(); |
| 398 |
dump_hic_modules(); |
| 399 |
|
| 400 |
log_error_time(); |
| 401 |
fputs("re-reading configuration files\n", stderr); |
| 402 |
read_config_files(); |
| 403 |
|
| 404 |
/* We now need to dispatch the threads again */ |
| 405 |
#ifdef ENABLE_HIC |
| 406 |
hic_init(); |
| 407 |
#endif |
| 408 |
smp_reinit(); |
| 409 |
ssl_reinit(); |
| 410 |
mmap_reinit(); |
| 411 |
|
| 412 |
log_error_time(); |
| 413 |
fputs("successful restart\n", stderr); |
| 414 |
|
| 415 |
} else { /* a normal thread -- not father */ |
| 416 |
pthread_exit(NULL); |
| 417 |
} |
| 418 |
|
| 419 |
} |
| 420 |
|
| 421 |
void sigint(int dummy) |
| 422 |
{ |
| 423 |
time(¤t_time); |
| 424 |
log_error_time(); |
| 425 |
fputs("caught SIGINT: shutting down\n", stderr); |
| 426 |
fclose(stderr); |
| 427 |
chdir(tempdir); |
| 428 |
exit(1); |
| 429 |
} |
| 430 |
|
| 431 |
void sigchld(int dummy) |
| 432 |
{ |
| 433 |
SET_LOCAL_PTH_SIGFLAG(sigchld_flag, 1); |
| 434 |
} |
| 435 |
|
| 436 |
void sigchld_run(void) |
| 437 |
{ |
| 438 |
int status; |
| 439 |
pid_t pid; |
| 440 |
|
| 441 |
SET_LOCAL_PTH_SIGFLAG(sigchld_flag, 0); |
| 442 |
|
| 443 |
while ((pid = waitpid(-1, &status, WNOHANG)) > 0) |
| 444 |
if (verbose_cgi_logs) { |
| 445 |
time(¤t_time); |
| 446 |
log_error_time(); |
| 447 |
fprintf(stderr, "reaping child %d: status %d\n", (int) pid, |
| 448 |
status); |
| 449 |
} |
| 450 |
return; |
| 451 |
} |
| 452 |
|
| 453 |
void sigalrm(int dummy) |
| 454 |
{ |
| 455 |
SET_PTH_SIGFLAG(sigalrm_flag, 1); |
| 456 |
} |
| 457 |
|
| 458 |
void sigusr2(int dummy) |
| 459 |
{ |
| 460 |
return; |
| 461 |
} |
| 462 |
|
| 463 |
void sigusr1(int dummy) |
| 464 |
{ |
| 465 |
SET_PTH_SIGFLAG(sigusr1_flag, 1); |
| 466 |
} |
| 467 |
|
| 468 |
extern int ssl_params_refresh; |
| 469 |
extern int boa_ssl; |
| 470 |
|
| 471 |
void sigalrm_run(void) |
| 472 |
{ |
| 473 |
SET_PTH_SIGFLAG(sigalrm_flag, 0); |
| 474 |
|
| 475 |
#ifdef ENABLE_SSL |
| 476 |
if (boa_ssl) |
| 477 |
ssl_regenerate_params(); |
| 478 |
#endif |
| 479 |
|
| 480 |
if (boa_ssl && ssl_params_refresh) |
| 481 |
alarm(ssl_params_refresh); |
| 482 |
} |
| 483 |
|
| 484 |
void sigusr1_run(void) |
| 485 |
{ |
| 486 |
int i; |
| 487 |
|
| 488 |
SET_PTH_SIGFLAG(sigusr1_flag, 0); |
| 489 |
|
| 490 |
time(¤t_time); |
| 491 |
|
| 492 |
for (i = 0; i < global_server_params_size; i++) { |
| 493 |
log_error_time(); |
| 494 |
fprintf(stderr, "Thread %d: %ld requests, %ld errors\n", |
| 495 |
i + 1, global_server_params[i].status.requests, |
| 496 |
global_server_params[i].status.errors); |
| 497 |
} |
| 498 |
|
| 499 |
show_hash_stats(); |
| 500 |
|
| 501 |
} |
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