httpd/server/mpm_common.c

	mpm_common.c revision 9b07fdbae72923016406bb66e2875e3324722a6f
3802a3d3d7af51ddff31943d5514382f01265770Lennart Poettering/* ====================================================================
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * The Apache Software License, Version 1.1
12b42c76672a66c2d4ea7212c14f8f1b5a62b78dTom Gundersen *
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * Copyright (c) 2000 The Apache Software Foundation.  All rights
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * reserved.
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * Redistribution and use in source and binary forms, with or without
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * modification, are permitted provided that the following conditions
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * are met:
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * 1. Redistributions of source code must retain the above copyright
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *    notice, this list of conditions and the following disclaimer.
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * 2. Redistributions in binary form must reproduce the above copyright
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *    notice, this list of conditions and the following disclaimer in
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *    the documentation and/or other materials provided with the
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *    distribution.
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * 3. The end-user documentation included with the redistribution,
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *    if any, must include the following acknowledgment:
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *       "This product includes software developed by the
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *        Apache Software Foundation (http://www.apache.org/)."
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *    Alternately, this acknowledgment may appear in the software itself,
301af7e4853ad0281402f8d86f5a77c6cb7ce9f4Josh Triplett *    if and wherever such third-party acknowledgments normally appear.
301af7e4853ad0281402f8d86f5a77c6cb7ce9f4Josh Triplett *
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * 4. The names "Apache" and "Apache Software Foundation" must
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *    not be used to endorse or promote products derived from this
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *    software without prior written permission. For written
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *    permission, please contact apache@apache.org.
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * 5. Products derived from this software may not be called "Apache",
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *    nor may "Apache" appear in their name, without prior written
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *    permission of the Apache Software Foundation.
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * SUCH DAMAGE.
301af7e4853ad0281402f8d86f5a77c6cb7ce9f4Josh Triplett * ====================================================================
301af7e4853ad0281402f8d86f5a77c6cb7ce9f4Josh Triplett *
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * This software consists of voluntary contributions made by many
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * individuals on behalf of the Apache Software Foundation.  For more
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * information on the Apache Software Foundation, please see
12b42c76672a66c2d4ea7212c14f8f1b5a62b78dTom Gundersen * <http://www.apache.org/>.
12b42c76672a66c2d4ea7212c14f8f1b5a62b78dTom Gundersen *
301af7e4853ad0281402f8d86f5a77c6cb7ce9f4Josh Triplett * Portions of this software are based upon public domain software
12b42c76672a66c2d4ea7212c14f8f1b5a62b78dTom Gundersen * originally written at the National Center for Supercomputing Applications,
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * University of Illinois, Urbana-Champaign.
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek */
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek/* The purpose of this file is to store the code that MOST mpm's will need
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * this does not mean a function only goes into this file if every MPM needs
dd2b607b7d1ce355e93f9f71cd256ec20b8ae9c4Thomas Hindoe Paaboel Andersen * it.  It means that if a function is needed by more than one MPM, and
18ead1b00dff180a97507d014325cb46198e6657Chris Mayo * future maintenance would be served by making the code common, then the
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * function belongs here.
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek *
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek * This is going in src/main because it is not platform specific, it is
e93549ef29c4123d9ee45acb5815048390201e49Zbigniew Jędrzejewski-Szmek * specific to multi-process servers, but NOT to Unix.  Which is why it
301af7e4853ad0281402f8d86f5a77c6cb7ce9f4Josh Triplett * does not belong in src/os/unix
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek */
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#include "apr_thread_proc.h"
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#include "httpd.h"
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#include "http_config.h"
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#include "http_log.h"
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#include "mpm.h"
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#include "mpm_common.h"
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#if HAVE_SYS_TIME_H
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#include <sys/time.h> /* for timeval definitions */
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#endif
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#if defined(DEXTER) || defined(MPMT_BEOS_MPM) || defined(BEOS_MPM)
8d0e0ddda6501479eb69164687c83c1a7667b33aJan Engelhardt#define CHILD_TABLE 1
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#define CHILD_INFO_TABLE     ap_child_table
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#elif defined(MPMT_PTHREAD) || defined (NO_THREADS) || defined(PREFORK_MPM)
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#define SCOREBOARD 1
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#define CHILD_INFO_TABLE     ap_scoreboard_image->parent
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#endif
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#ifdef CHILD_INFO_TABLE
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmekvoid ap_reclaim_child_processes(int terminate)
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek{
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek    int i;
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek    long int waittime = 1024 * 16;      /* in usecs */
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek    ap_status_t waitret;
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek    int tries;
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek    int not_dead_yet;
8c9571d0ae50656f730a5e37378d5c3dcf3b9789Lennart Poettering    int max_daemons = ap_get_max_daemons();
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek
442f7f155358a7396a350d3c47ea42e86bee4024Chris Atkinson#ifdef SCOREBOARD
a8eaaee72a2f06e0fb64fb71de3b71ecba31dafbJan Engelhardt    ap_sync_scoreboard_image();
8c9571d0ae50656f730a5e37378d5c3dcf3b9789Lennart Poettering#endif
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek    for (tries = terminate ? 4 : 1; tries <= 9; ++tries) {
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek        /* don't want to hold up progress any more than
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek         * necessary, but we need to allow children a few moments to exit.
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek         * Set delay with an exponential backoff.
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek         */
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek        waittime = waittime * 4;
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek        ap_sleep(waittime);
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek        /* now see who is done */
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek        not_dead_yet = 0;
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek        for (i = 0; i < max_daemons; ++i) {
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek            pid_t pid = CHILD_INFO_TABLE[i].pid;
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek            ap_proc_t proc;
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#ifdef CHILD_TABLE
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek            if (ap_child_table[i].status == SERVER_DEAD)
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek#elif defined(SCOREBOARD)
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek            if (pid == ap_my_pid || pid == 0)
0dc5d23c85db85f96b141d4d32deee8018e56a6aLennart Poettering#endif
0dc5d23c85db85f96b141d4d32deee8018e56a6aLennart Poettering                continue;
0dc5d23c85db85f96b141d4d32deee8018e56a6aLennart Poettering
0dc5d23c85db85f96b141d4d32deee8018e56a6aLennart Poettering            proc.pid = pid;
0dc5d23c85db85f96b141d4d32deee8018e56a6aLennart Poettering            waitret = ap_wait_proc(&proc, APR_NOWAIT);
0dc5d23c85db85f96b141d4d32deee8018e56a6aLennart Poettering            if (waitret != APR_CHILD_NOTDONE) {
0dc5d23c85db85f96b141d4d32deee8018e56a6aLennart Poettering#ifdef CHILD_TABLE
0dc5d23c85db85f96b141d4d32deee8018e56a6aLennart Poettering                ap_child_table[i].status = SERVER_DEAD;
0dc5d23c85db85f96b141d4d32deee8018e56a6aLennart Poettering#elif defined(SCOREBOARD)
0dc5d23c85db85f96b141d4d32deee8018e56a6aLennart Poettering                ap_scoreboard_image->parent[i].pid = 0;
0dc5d23c85db85f96b141d4d32deee8018e56a6aLennart Poettering#endif
0dc5d23c85db85f96b141d4d32deee8018e56a6aLennart Poettering                continue;
0dc5d23c85db85f96b141d4d32deee8018e56a6aLennart Poettering            }
0dc5d23c85db85f96b141d4d32deee8018e56a6aLennart Poettering            ++not_dead_yet;
cbfaff65cb086e3eb3709cf86dcf63b46622389bKarel Zak            switch (tries) {
5470c03b37d8421a903564c2c8028c8b8d67d403Lennart Poettering            case 1:     /*  16ms */
b938cb902c3b5bca807a94b277672c64d6767886Jan Engelhardt            case 2:     /*  82ms */
5470c03b37d8421a903564c2c8028c8b8d67d403Lennart Poettering                break;
0dc5d23c85db85f96b141d4d32deee8018e56a6aLennart Poettering            case 3:     /* 344ms */
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek            case 4:     /*  16ms */
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek            case 5:     /*  82ms */
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek            case 6:     /* 344ms */
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek            case 7:     /* 1.4sec */
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek                /* ok, now it's being annoying */
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek                ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING,
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek                             0, ap_server_conf,
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek                   "child process %ld still did not exit, sending a SIGTERM",
0dc5d23c85db85f96b141d4d32deee8018e56a6aLennart Poettering                             (long)pid);
0dc5d23c85db85f96b141d4d32deee8018e56a6aLennart Poettering                kill(pid, SIGTERM);
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek                break;
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek            case 8:     /*  6 sec */
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek                /* die child scum */
3cc765d2718ac9b4ff978044ceabf5ad59d73edfZbigniew Jędrzejewski-Szmek                ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR,
                             0, ap_server_conf,
                   "child process %ld still did not exit, sending a SIGKILL",
                             (long)pid);
#ifndef BEOS
                kill(pid, SIGKILL);
#else
                /* sending a SIGKILL kills the entire team on BeOS, and as
                 * httpd thread is part of that team it removes any chance
                 * of ever doing a restart.  To counter this I'm changing to
                 * use a kinder, gentler way of killing a specific thread
                 * that is just as effective.
                 */
                kill_thread(pid);
#endif
                break;
            case 9:     /* 14 sec */
                /* gave it our best shot, but alas...  If this really
                 * is a child we are trying to kill and it really hasn't
                 * exited, we will likely fail to bind to the port
                 * after the restart.
                 */
                ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR,
                             0, ap_server_conf,
                             "could not make child process %ld exit, "
                             "attempting to continue anyway", (long)pid);
                break;
            }
        }
        ap_check_other_child();
        if (!not_dead_yet) {
            /* nothing left to wait for */
            break;
        }
    }
}
#endif

/* number of calls to wait_or_timeout between writable probes */
#ifndef INTERVAL_OF_WRITABLE_PROBES
#define INTERVAL_OF_WRITABLE_PROBES 10
#endif
static int wait_or_timeout_counter;

void ap_wait_or_timeout(ap_wait_t *status, ap_proc_t *ret, ap_pool_t *p)
{
    ap_status_t rv;

    ++wait_or_timeout_counter;
    if (wait_or_timeout_counter == INTERVAL_OF_WRITABLE_PROBES) {
        wait_or_timeout_counter = 0;
#ifdef APR_HAS_OTHER_CHILD
        ap_probe_writable_fds();
#endif
    }
    rv = ap_wait_all_procs(ret, status, APR_NOWAIT, p);
    if (ap_canonical_error(rv) == APR_EINTR) {
        ret->pid = -1;
        return;
    }
    if (rv == APR_CHILD_DONE) {
        return;
    }
#ifdef NEED_WAITPID
    if ((ret = reap_children(status)) > 0) {
        return;
    }
#endif
    ap_sleep(SCOREBOARD_MAINTENANCE_INTERVAL);
    ret->pid = -1;
    return;
}

void ap_process_child_status(ap_proc_t *pid, ap_wait_t status)
{
    /* Child died... if it died due to a fatal error,
        * we should simply bail out.
        */
    if ((WIFEXITED(status)) &&
        WEXITSTATUS(status) == APEXIT_CHILDFATAL) {
        ap_log_error(APLOG_MARK, APLOG_ALERT|APLOG_NOERRNO, 0, ap_server_conf,
                        "Child %ld returned a Fatal error... \n"
                        "Apache is exiting!",
                        (long)pid->pid);
        exit(APEXIT_CHILDFATAL);
    }
    if (WIFSIGNALED(status)) {
        switch (WTERMSIG(status)) {
        case SIGTERM:
        case SIGHUP:
        case SIGUSR1:
        case SIGKILL:
            break;
        default:
#ifdef SYS_SIGLIST
#ifdef WCOREDUMP
            if (WCOREDUMP(status)) {
                ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE,
                             0, ap_server_conf,
                             "child pid %ld exit signal %s (%d), "
                             "possible coredump in %s",
                             (long)pid->pid, (WTERMSIG(status) >= NumSIG) ? "" :
                             SYS_SIGLIST[WTERMSIG(status)], WTERMSIG(status),
                             ap_coredump_dir);
            }
            else {
#endif
                ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE,
                             0, ap_server_conf,
                             "child pid %ld exit signal %s (%d)",
                             (long)pid->pid,
                             SYS_SIGLIST[WTERMSIG(status)], WTERMSIG(status));
#ifdef WCOREDUMP
            }
#endif
#else
            ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE,
                         0, ap_server_conf,
                         "child pid %ld exit signal %d",
                         (long)pid->pid, WTERMSIG(status));
#endif
        }
    }
}