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1.2
date	2012.08.18.14.29.08;	author ohauer;	state dead;
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1.1
date	2010.05.06.23.26.43;	author pgollucci;	state Exp;
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desc
@@


1.2
log
@SVN rev 302724 on 2012-08-18 14:29:08Z by ohauer

- remove www/apache20 and devel/apr0
- s/USE_APACHE= 20+/USE_APACHE= 22+/
- unify s/YES/yes/
- cleanup APACHE_VERSION <= 22 usage
- add entry to MOVED

with hat apache@@
@
text
@diff -Nur server/mpm/config.m4 server/mpm/config.m4
--- server/mpm/config.m4	2004-11-24 20:31:09.000000000 +0100
+++ server/mpm/config.m4	2006-10-30 11:58:33.000000000 +0100
@@@@ -1,7 +1,7 @@@@
 AC_MSG_CHECKING(which MPM to use)
 AC_ARG_WITH(mpm,
 APACHE_HELP_STRING(--with-mpm=MPM,Choose the process model for Apache to use.
-                          MPM={beos|worker|prefork|mpmt_os2|perchild|leader|threadpool}),[
+                          MPM={beos|worker|prefork|mpmt_os2|perchild|leader|threadpool|itk}),[
   APACHE_MPM=$withval
 ],[
   if test "x$APACHE_MPM" = "x"; then
@@@@ -12,7 +12,7 @@@@
 
 apache_cv_mpm=$APACHE_MPM
 	
-if test "$apache_cv_mpm" = "worker" -o "$apache_cv_mpm" = "perchild" -o "$apache_cv_mpm" = "leader" -o "$apache_cv_mpm" = "threadpool" ; then
+if test "$apache_cv_mpm" = "worker" -o "$apache_cv_mpm" = "perchild" -o "$apache_cv_mpm" = "leader" -o "$apache_cv_mpm" = "threadpool" -o "$apache_cv_mpm" = "itk"; then
   APR_CHECK_APR_DEFINE(APR_HAS_THREADS)
 
   if test "x$ac_cv_define_APR_HAS_THREADS" = "xno"; then
@@@@ -26,7 +26,7 @@@@
 APACHE_FAST_OUTPUT(server/mpm/Makefile)
 
 MPM_NAME=$apache_cv_mpm
-if test "$MPM_NAME" = "leader" -o "$MPM_NAME" = "threadpool" -o "$MPM_NAME" = "perchild"; then
+if test "$MPM_NAME" = "leader" -o "$MPM_NAME" = "threadpool" -o "$MPM_NAME" = "perchild" -o "$MPM_NAME" = "itk"; then
   AC_MSG_WARN(You have selected an EXPERIMENTAL MPM.  Be warned!)
   MPM_SUBDIR_NAME=experimental/$MPM_NAME
 else
diff -Nur server/mpm/experimental/itk/Makefile.in server/mpm/experimental/itk/Makefile.in
--- server/mpm/experimental/itk/Makefile.in	1970-01-01 01:00:00.000000000 +0100
+++ server/mpm/experimental/itk/Makefile.in	2006-10-29 22:39:54.000000000 +0100
@@@@ -0,0 +1,5 @@@@
+
+LTLIBRARY_NAME    = libitk.la
+LTLIBRARY_SOURCES = itk.c
+
+include $(top_srcdir)/build/ltlib.mk
diff -Nur server/mpm/experimental/itk/config5.m4 server/mpm/experimental/itk/config5.m4
--- server/mpm/experimental/itk/config5.m4	1970-01-01 01:00:00.000000000 +0100
+++ server/mpm/experimental/itk/config5.m4	2006-10-29 22:39:54.000000000 +0100
@@@@ -0,0 +1,4 @@@@
+ if test "$MPM_NAME" = "itk" ; then
+   AC_CHECK_FUNCS(pthread_kill) 
+   APACHE_FAST_OUTPUT(server/mpm/$MPM_SUBDIR_NAME/Makefile)
+ fi
diff -Nur server/mpm/experimental/itk/itk.c server/mpm/experimental/itk/itk.c
--- server/mpm/experimental/itk/itk.c	1970-01-01 01:00:00.000000000 +0100
+++ server/mpm/experimental/itk/itk.c	2006-10-30 18:51:03.000000000 +0100
@@@@ -0,0 +1,1500 @@@@
+/* Copyright 1999-2004 The Apache Software Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "apr.h"
+#include "apr_portable.h"
+#include "apr_strings.h"
+#include "apr_thread_proc.h"
+#include "apr_signal.h"
+
+# define _DBG(text,par...) \
+    ap_log_error(APLOG_MARK, APLOG_WARNING, 0, NULL, \
+		 "(itkmpm: pid=%d uid=%d) %s(): " text, \
+		 getpid(), getuid(), __FUNCTION__, ##par, 0)
+
+#define APR_WANT_STDIO
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#if APR_HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if APR_HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#define CORE_PRIVATE
+
+#include "ap_config.h"
+#include "httpd.h"
+#include "mpm_default.h"
+#include "http_main.h"
+#include "http_log.h"
+#include "http_config.h"
+#include "http_core.h"		/* for get_remote_host */
+#include "http_connection.h"
+#include "scoreboard.h"
+#include "ap_mpm.h"
+#include "unixd.h"
+#include "mpm_common.h"
+#include "ap_listen.h"
+#include "ap_mmn.h"
+#include "apr_poll.h"
+
+#ifdef HAVE_BSTRING_H
+#include <bstring.h>		/* for IRIX, FD_SET calls bzero() */
+#endif
+#ifdef HAVE_TIME_H
+#include <time.h>
+#endif
+#ifdef HAVE_SYS_PROCESSOR_H
+#include <sys/processor.h> /* for bindprocessor() */
+#endif
+
+#include <signal.h>
+#include <sys/times.h>
+
+/* Limit on the total --- clients will be locked out if more servers than
+ * this are needed.  It is intended solely to keep the server from crashing
+ * when things get out of hand.
+ *
+ * We keep a hard maximum number of servers, for two reasons --- first off,
+ * in case something goes seriously wrong, we want to stop the fork bomb
+ * short of actually crashing the machine we're running on by filling some
+ * kernel table.  Secondly, it keeps the size of the scoreboard file small
+ * enough that we can read the whole thing without worrying too much about
+ * the overhead.
+ */
+#ifndef DEFAULT_SERVER_LIMIT
+#define DEFAULT_SERVER_LIMIT 256
+#endif
+
+/* Admin can't tune ServerLimit beyond MAX_SERVER_LIMIT.  We want
+ * some sort of compile-time limit to help catch typos.
+ */
+#ifndef MAX_SERVER_LIMIT
+#define MAX_SERVER_LIMIT 20000
+#endif
+
+#ifndef HARD_THREAD_LIMIT
+#define HARD_THREAD_LIMIT 1
+#endif
+
+/* config globals */
+
+int ap_threads_per_child=0;         /* Worker threads per child */
+static apr_proc_mutex_t *accept_mutex;
+static int ap_daemons_to_start=0;
+static int ap_daemons_min_free=0;
+static int ap_daemons_max_free=0;
+static int ap_daemons_limit=0;      /* MaxClients */
+static int server_limit = DEFAULT_SERVER_LIMIT;
+static int first_server_limit;
+static int changed_limit_at_restart;
+static int mpm_state = AP_MPMQ_STARTING;
+static ap_pod_t *pod;
+
+/*
+ * The max child slot ever assigned, preserved across restarts.  Necessary
+ * to deal with MaxClients changes across AP_SIG_GRACEFUL restarts.  We 
+ * use this value to optimize routines that have to scan the entire scoreboard.
+ */
+int ap_max_daemons_limit = -1;
+server_rec *ap_server_conf;
+
+/* one_process --- debugging mode variable; can be set from the command line
+ * with the -X flag.  If set, this gets you the child_main loop running
+ * in the process which originally started up (no detach, no make_child),
+ * which is a pretty nice debugging environment.  (You'll get a SIGHUP
+ * early in standalone_main; just continue through.  This is the server
+ * trying to kill off any child processes which it might have lying
+ * around --- Apache doesn't keep track of their pids, it just sends
+ * SIGHUP to the process group, ignoring it in the root process.
+ * Continue through and you'll be fine.).
+ */
+
+static int one_process = 0;
+
+static apr_pool_t *pconf;		/* Pool for config stuff */
+static apr_pool_t *pchild;		/* Pool for httpd child stuff */
+
+static pid_t ap_my_pid;	/* it seems silly to call getpid all the time */
+static pid_t parent_pid;
+#ifndef MULTITHREAD
+static int my_child_num;
+#endif
+ap_generation_t volatile ap_my_generation=0;
+
+#ifdef TPF
+int tpf_child = 0;
+char tpf_server_name[INETD_SERVNAME_LENGTH+1];
+#endif /* TPF */
+
+static int die_now = 0;
+
+typedef struct
+{
+	uid_t uid;
+	gid_t gid;
+	char *username;
+	int max_clients_vhost;
+} itk_server_conf;
+
+module AP_MODULE_DECLARE_DATA mpm_itk_module;
+
+#ifdef GPROF
+/* 
+ * change directory for gprof to plop the gmon.out file
+ * configure in httpd.conf:
+ * GprofDir $RuntimeDir/   -> $ServerRoot/$RuntimeDir/gmon.out
+ * GprofDir $RuntimeDir/%  -> $ServerRoot/$RuntimeDir/gprof.$pid/gmon.out
+ */
+static void chdir_for_gprof(void)
+{
+    core_server_config *sconf = 
+	ap_get_module_config(ap_server_conf->module_config, &core_module);    
+    char *dir = sconf->gprof_dir;
+    const char *use_dir;
+
+    if(dir) {
+        apr_status_t res;
+	char buf[512];
+	int len = strlen(sconf->gprof_dir) - 1;
+	if(*(dir + len) == '%') {
+	    dir[len] = '\0';
+	    apr_snprintf(buf, sizeof(buf), "%sgprof.%d", dir, (int)getpid());
+	} 
+	use_dir = ap_server_root_relative(pconf, buf[0] ? buf : dir);
+	res = apr_dir_make(use_dir, 0755, pconf);
+	if(res != APR_SUCCESS && !APR_STATUS_IS_EEXIST(res)) {
+	    ap_log_error(APLOG_MARK, APLOG_ERR, errno, ap_server_conf,
+			 "gprof: error creating directory %s", dir);
+	}
+    }
+    else {
+	use_dir = ap_server_root_relative(pconf, DEFAULT_REL_RUNTIMEDIR);
+    }
+
+    chdir(use_dir);
+}
+#else
+#define chdir_for_gprof()
+#endif
+
+/* XXX - I don't know if TPF will ever use this module or not, so leave
+ * the ap_check_signals calls in but disable them - manoj */
+#define ap_check_signals() 
+
+/* a clean exit from a child with proper cleanup */
+static void clean_child_exit(int code) __attribute__ ((noreturn));
+static void clean_child_exit(int code)
+{
+    mpm_state = AP_MPMQ_STOPPING;
+
+    if (pchild) {
+	apr_pool_destroy(pchild);
+    }
+    ap_mpm_pod_close(pod);
+    chdir_for_gprof();
+    exit(code);
+}
+
+static void accept_mutex_on(void)
+{
+    apr_status_t rv = apr_proc_mutex_lock(accept_mutex);
+    if (rv != APR_SUCCESS) {
+        const char *msg = "couldn't grab the accept mutex";
+
+        if (ap_my_generation != 
+            ap_scoreboard_image->global->running_generation) {
+            ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, NULL, msg);
+            clean_child_exit(0);
+        }
+        else {
+            ap_log_error(APLOG_MARK, APLOG_EMERG, rv, NULL, msg);
+            exit(APEXIT_CHILDFATAL);
+        }
+    }
+}
+
+static void accept_mutex_off(void)
+{
+    apr_status_t rv = apr_proc_mutex_unlock(accept_mutex);
+    if (rv != APR_SUCCESS) {
+        const char *msg = "couldn't release the accept mutex";
+
+        if (ap_my_generation != 
+            ap_scoreboard_image->global->running_generation) {
+            ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, NULL, msg);
+            /* don't exit here... we have a connection to
+             * process, after which point we'll see that the
+             * generation changed and we'll exit cleanly
+             */
+        }
+        else {
+            ap_log_error(APLOG_MARK, APLOG_EMERG, rv, NULL, msg);
+            exit(APEXIT_CHILDFATAL);
+        }
+    }
+}
+
+/* On some architectures it's safe to do unserialized accept()s in the single
+ * Listen case.  But it's never safe to do it in the case where there's
+ * multiple Listen statements.  Define SINGLE_LISTEN_UNSERIALIZED_ACCEPT
+ * when it's safe in the single Listen case.
+ */
+#ifdef SINGLE_LISTEN_UNSERIALIZED_ACCEPT
+#define SAFE_ACCEPT(stmt) do {if (ap_listeners->next) {stmt;}} while(0)
+#else
+#define SAFE_ACCEPT(stmt) do {stmt;} while(0)
+#endif
+
+AP_DECLARE(apr_status_t) ap_mpm_query(int query_code, int *result)
+{
+    switch(query_code){
+        case AP_MPMQ_MAX_DAEMON_USED:
+            *result = ap_daemons_limit;
+            return APR_SUCCESS;
+        case AP_MPMQ_IS_THREADED:
+            *result = AP_MPMQ_NOT_SUPPORTED;
+            return APR_SUCCESS;
+        case AP_MPMQ_IS_FORKED:
+            *result = AP_MPMQ_DYNAMIC;
+            return APR_SUCCESS;
+        case AP_MPMQ_HARD_LIMIT_DAEMONS:
+            *result = server_limit;
+            return APR_SUCCESS;
+        case AP_MPMQ_HARD_LIMIT_THREADS:
+            *result = HARD_THREAD_LIMIT;
+            return APR_SUCCESS;
+        case AP_MPMQ_MAX_THREADS:
+            *result = 0;
+            return APR_SUCCESS;
+        case AP_MPMQ_MIN_SPARE_DAEMONS:
+            *result = ap_daemons_min_free;
+            return APR_SUCCESS;
+        case AP_MPMQ_MIN_SPARE_THREADS:
+            *result = 0;
+            return APR_SUCCESS;
+        case AP_MPMQ_MAX_SPARE_DAEMONS:
+            *result = ap_daemons_max_free;
+            return APR_SUCCESS;
+        case AP_MPMQ_MAX_SPARE_THREADS:
+            *result = 0;
+            return APR_SUCCESS;
+        case AP_MPMQ_MAX_REQUESTS_DAEMON:
+            *result = ap_max_requests_per_child;
+            return APR_SUCCESS;
+        case AP_MPMQ_MAX_DAEMONS:
+            *result = server_limit;
+            return APR_SUCCESS;
+        case AP_MPMQ_MPM_STATE:
+            *result = mpm_state;
+            return APR_SUCCESS;
+    }
+    return APR_ENOTIMPL;
+}
+
+#if defined(NEED_WAITPID)
+/*
+   Systems without a real waitpid sometimes lose a child's exit while waiting
+   for another.  Search through the scoreboard for missing children.
+ */
+int reap_children(int *exitcode, apr_exit_why_e *status)
+{
+    int n, pid;
+
+    for (n = 0; n < ap_max_daemons_limit; ++n) {
+	if (ap_scoreboard_image->servers[n][0].status != SERVER_DEAD &&
+		kill((pid = ap_scoreboard_image->parent[n].pid), 0) == -1) {
+	    ap_update_child_status_from_indexes(n, 0, SERVER_DEAD, NULL);
+	    /* just mark it as having a successful exit status */
+            *status = APR_PROC_EXIT;
+            *exitcode = 0;
+	    return(pid);
+	}
+    }
+    return 0;
+}
+#endif
+
+/*****************************************************************
+ * Connection structures and accounting...
+ */
+
+static void just_die(int sig)
+{
+    clean_child_exit(0);
+}
+
+/* volatile just in case */
+static int volatile shutdown_pending;
+static int volatile restart_pending;
+static int volatile is_graceful;
+
+static void sig_term(int sig)
+{
+    if (shutdown_pending == 1) {
+	/* Um, is this _probably_ not an error, if the user has
+	 * tried to do a shutdown twice quickly, so we won't
+	 * worry about reporting it.
+	 */
+	return;
+    }
+    shutdown_pending = 1;
+}
+
+/* restart() is the signal handler for SIGHUP and AP_SIG_GRACEFUL
+ * in the parent process, unless running in ONE_PROCESS mode
+ */
+static void restart(int sig)
+{
+    if (restart_pending == 1) {
+	/* Probably not an error - don't bother reporting it */
+	return;
+    }
+    restart_pending = 1;
+    is_graceful = (sig == AP_SIG_GRACEFUL);
+}
+
+static void set_signals(void)
+{
+#ifndef NO_USE_SIGACTION
+    struct sigaction sa;
+#endif
+
+    if (!one_process) {
+        ap_fatal_signal_setup(ap_server_conf, pconf);
+    }
+
+#ifndef NO_USE_SIGACTION
+    sigemptyset(&sa.sa_mask);
+    sa.sa_flags = 0;
+
+    sa.sa_handler = sig_term;
+    if (sigaction(SIGTERM, &sa, NULL) < 0)
+	ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGTERM)");
+#ifdef SIGINT
+    if (sigaction(SIGINT, &sa, NULL) < 0)
+        ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGINT)");
+#endif
+#ifdef SIGXCPU
+    sa.sa_handler = SIG_DFL;
+    if (sigaction(SIGXCPU, &sa, NULL) < 0)
+	ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGXCPU)");
+#endif
+#ifdef SIGXFSZ
+    sa.sa_handler = SIG_DFL;
+    if (sigaction(SIGXFSZ, &sa, NULL) < 0)
+	ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGXFSZ)");
+#endif
+#ifdef SIGPIPE
+    sa.sa_handler = SIG_IGN;
+    if (sigaction(SIGPIPE, &sa, NULL) < 0)
+	ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGPIPE)");
+#endif
+
+    /* we want to ignore HUPs and AP_SIG_GRACEFUL while we're busy 
+     * processing one */
+    sigaddset(&sa.sa_mask, SIGHUP);
+    sigaddset(&sa.sa_mask, AP_SIG_GRACEFUL);
+    sa.sa_handler = restart;
+    if (sigaction(SIGHUP, &sa, NULL) < 0)
+	ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGHUP)");
+    if (sigaction(AP_SIG_GRACEFUL, &sa, NULL) < 0)
+        ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(" AP_SIG_GRACEFUL_STRING ")");
+#else
+    if (!one_process) {
+#ifdef SIGXCPU
+	apr_signal(SIGXCPU, SIG_DFL);
+#endif /* SIGXCPU */
+#ifdef SIGXFSZ
+	apr_signal(SIGXFSZ, SIG_DFL);
+#endif /* SIGXFSZ */
+    }
+
+    apr_signal(SIGTERM, sig_term);
+#ifdef SIGHUP
+    apr_signal(SIGHUP, restart);
+#endif /* SIGHUP */
+#ifdef AP_SIG_GRACEFUL
+    apr_signal(AP_SIG_GRACEFUL, restart);
+#endif /* AP_SIG_GRACEFUL */
+#ifdef SIGPIPE
+    apr_signal(SIGPIPE, SIG_IGN);
+#endif /* SIGPIPE */
+
+#endif
+}
+
+/*****************************************************************
+ * Child process main loop.
+ * The following vars are static to avoid getting clobbered by longjmp();
+ * they are really private to child_main.
+ */
+
+static int requests_this_child;
+static int num_listensocks = 0;
+static ap_listen_rec *listensocks;
+
+int ap_graceful_stop_signalled(void)
+{
+    /* not ever called anymore... */
+    return 0;
+}
+
+
+static void child_main(int child_num_arg)
+{
+    apr_pool_t *ptrans;
+    apr_allocator_t *allocator;
+    conn_rec *current_conn;
+    apr_status_t status = APR_EINIT;
+    int i;
+    ap_listen_rec *lr;
+    int curr_pollfd, last_pollfd = 0;
+    apr_pollfd_t *pollset;
+    int offset;
+    void *csd;
+    ap_sb_handle_t *sbh;
+    apr_status_t rv;
+    apr_bucket_alloc_t *bucket_alloc;
+
+    mpm_state = AP_MPMQ_STARTING; /* for benefit of any hooks that run as this
+                                  * child initializes
+                                  */
+    
+    my_child_num = child_num_arg;
+    ap_my_pid = getpid();
+    csd = NULL;
+    requests_this_child = 0;
+
+    ap_fatal_signal_child_setup(ap_server_conf);
+
+    /* Get a sub context for global allocations in this child, so that
+     * we can have cleanups occur when the child exits.
+     */
+    apr_allocator_create(&allocator);
+    apr_allocator_max_free_set(allocator, ap_max_mem_free);
+    apr_pool_create_ex(&pchild, pconf, NULL, allocator);
+    apr_allocator_owner_set(allocator, pchild);
+
+    apr_pool_create(&ptrans, pchild);
+    apr_pool_tag(ptrans, "transaction");
+
+    /* needs to be done before we switch UIDs so we have permissions */
+    ap_reopen_scoreboard(pchild, NULL, 0);
+    rv = apr_proc_mutex_child_init(&accept_mutex, ap_lock_fname, pchild);
+    if (rv != APR_SUCCESS) {
+        ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,
+                     "Couldn't initialize cross-process lock in child");
+        clean_child_exit(APEXIT_CHILDFATAL);
+    }
+
+/*    if (unixd_setup_child()) {
+	clean_child_exit(APEXIT_CHILDFATAL);
+    } */
+
+    ap_run_child_init(pchild, ap_server_conf);
+
+    ap_create_sb_handle(&sbh, pchild, my_child_num, 0);
+
+    (void) ap_update_child_status(sbh, SERVER_READY, (request_rec *) NULL);
+
+    /* Set up the pollfd array */
+    listensocks = apr_pcalloc(pchild,
+                            sizeof(*listensocks) * (num_listensocks));
+    for (lr = ap_listeners, i = 0; i < num_listensocks; lr = lr->next, i++) {
+        listensocks[i].accept_func = lr->accept_func;
+        listensocks[i].sd = lr->sd;
+    }
+
+    pollset = apr_palloc(pchild, sizeof(*pollset) * num_listensocks);
+    pollset[0].p = pchild;
+    for (i = 0; i < num_listensocks; i++) {
+        pollset[i].desc.s = listensocks[i].sd;
+        pollset[i].desc_type = APR_POLL_SOCKET;
+        pollset[i].reqevents = APR_POLLIN;
+    }
+
+    mpm_state = AP_MPMQ_RUNNING;
+    
+    bucket_alloc = apr_bucket_alloc_create(pchild);
+
+    while (!die_now) {
+	/*
+	 * (Re)initialize this child to a pre-connection state.
+	 */
+
+	current_conn = NULL;
+
+	apr_pool_clear(ptrans);
+
+	if ((ap_max_requests_per_child > 0
+	     && requests_this_child++ >= ap_max_requests_per_child)) {
+	    clean_child_exit(0);
+	}
+
+	(void) ap_update_child_status(sbh, SERVER_READY, (request_rec *) NULL);
+
+	/*
+	 * Wait for an acceptable connection to arrive.
+	 */
+
+	/* Lock around "accept", if necessary */
+	SAFE_ACCEPT(accept_mutex_on());
+
+        if (num_listensocks == 1) {
+            offset = 0;
+        }
+        else {
+            /* multiple listening sockets - need to poll */
+	    for (;;) {
+                apr_status_t ret;
+                apr_int32_t n;
+
+                ret = apr_poll(pollset, num_listensocks, &n, -1);
+                if (ret != APR_SUCCESS) {
+                    if (APR_STATUS_IS_EINTR(ret)) {
+                        continue;
+                    }
+    	            /* Single Unix documents select as returning errnos
+    	             * EBADF, EINTR, and EINVAL... and in none of those
+    	             * cases does it make sense to continue.  In fact
+    	             * on Linux 2.0.x we seem to end up with EFAULT
+    	             * occasionally, and we'd loop forever due to it.
+    	             */
+    	            ap_log_error(APLOG_MARK, APLOG_ERR, ret, ap_server_conf,
+                             "apr_poll: (listen)");
+    	            clean_child_exit(1);
+                }
+                /* find a listener */
+                curr_pollfd = last_pollfd;
+                do {
+                    curr_pollfd++;
+                    if (curr_pollfd >= num_listensocks) {
+                        curr_pollfd = 0;
+                    }
+                    /* XXX: Should we check for POLLERR? */
+                    if (pollset[curr_pollfd].rtnevents & APR_POLLIN) {
+                        last_pollfd = curr_pollfd;
+                        offset = curr_pollfd;
+                        goto got_fd;
+                    }
+                } while (curr_pollfd != last_pollfd);
+
+                continue;
+            }
+        }
+    got_fd:
+	/* if we accept() something we don't want to die, so we have to
+	 * defer the exit
+	 */
+        status = listensocks[offset].accept_func(&csd, 
+                                                 &listensocks[offset], ptrans);
+        SAFE_ACCEPT(accept_mutex_off());	/* unlock after "accept" */
+
+        if (status == APR_EGENERAL) {
+            /* resource shortage or should-not-occur occured */
+            clean_child_exit(1);
+        }
+        else if (status != APR_SUCCESS) {
+            continue;
+        }
+
+	/*
+	 * We now have a connection, so set it up with the appropriate
+	 * socket options, file descriptors, and read/write buffers.
+	 */
+	{
+		pid_t pid = fork();
+		int status;
+		switch (pid) {
+		case -1:
+			ap_log_error(APLOG_MARK, APLOG_ERR, errno, NULL, "fork: Unable to fork new process");
+			break;
+		case 0: /* child */
+			apr_proc_mutex_child_init(&accept_mutex, ap_lock_fname, pchild);
+			current_conn = ap_run_create_connection(ptrans, ap_server_conf, csd, my_child_num, sbh, bucket_alloc);
+		        if (current_conn) {
+		            ap_process_connection(current_conn, csd);
+		            ap_lingering_close(current_conn);
+		        }
+			exit(0);
+		default: /* parent; just wait for child to be done */
+			if (waitpid(pid, &status, 0) != pid || !WIFEXITED(status)) {
+				if (WIFSIGNALED(status)) {
+					ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, "child died with signal %u", WTERMSIG(status));
+				} else if (WEXITSTATUS(status) != 0) {
+					ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, "child exited with non-zero exit status %u", WEXITSTATUS(status));
+				} else {
+					ap_log_error(APLOG_MARK, APLOG_ERR, errno, NULL, "waitpid() failed");
+				}
+				clean_child_exit(1);
+			}
+			break;
+		}
+	}
+        
+        /* Check the pod and the generation number after processing a
+         * connection so that we'll go away if a graceful restart occurred
+         * while we were processing the connection or we are the lucky
+         * idle server process that gets to die.
+         */
+        if (ap_mpm_pod_check(pod) == APR_SUCCESS) { /* selected as idle? */
+            die_now = 1;
+        }
+        else if (ap_my_generation !=
+                 ap_scoreboard_image->global->running_generation) { /* restart? */
+            /* yeah, this could be non-graceful restart, in which case the
+             * parent will kill us soon enough, but why bother checking?
+             */
+            die_now = 1;
+        }
+
+	/* if we have already setuid(), die (we can't be used anyhow) */
+	if (getuid())
+	    die_now = 1;
+    }
+    clean_child_exit(0);
+}
+
+
+static int make_child(server_rec *s, int slot)
+{
+    int pid;
+
+    if (slot + 1 > ap_max_daemons_limit) {
+	ap_max_daemons_limit = slot + 1;
+    }
+
+    if (one_process) {
+	apr_signal(SIGHUP, just_die);
+        /* Don't catch AP_SIG_GRACEFUL in ONE_PROCESS mode :) */
+	apr_signal(SIGINT, just_die);
+#ifdef SIGQUIT
+	apr_signal(SIGQUIT, SIG_DFL);
+#endif
+	apr_signal(SIGTERM, just_die);
+	child_main(slot);
+    }
+
+    (void) ap_update_child_status_from_indexes(slot, 0, SERVER_STARTING,
+                                               (request_rec *) NULL);
+
+
+#ifdef _OSD_POSIX
+    /* BS2000 requires a "special" version of fork() before a setuid() call */
+    if ((pid = os_fork(unixd_config.user_name)) == -1) {
+#elif defined(TPF)
+    if ((pid = os_fork(s, slot)) == -1) {
+#else
+    if ((pid = fork()) == -1) {
+#endif
+	ap_log_error(APLOG_MARK, APLOG_ERR, errno, s, "fork: Unable to fork new process");
+
+	/* fork didn't succeed. Fix the scoreboard or else
+	 * it will say SERVER_STARTING forever and ever
+	 */
+	(void) ap_update_child_status_from_indexes(slot, 0, SERVER_DEAD,
+                                                   (request_rec *) NULL);
+
+	/* In case system resources are maxxed out, we don't want
+	   Apache running away with the CPU trying to fork over and
+	   over and over again. */
+	sleep(10);
+
+	return -1;
+    }
+
+    if (!pid) {
+#ifdef HAVE_BINDPROCESSOR
+        /* by default AIX binds to a single processor
+         * this bit unbinds children which will then bind to another cpu
+         */
+	int status = bindprocessor(BINDPROCESS, (int)getpid(), 
+				   PROCESSOR_CLASS_ANY);
+	if (status != OK) {
+	    ap_log_error(APLOG_MARK, APLOG_WARNING, errno, 
+                         ap_server_conf, "processor unbind failed %d", status);
+	}
+#endif
+	RAISE_SIGSTOP(MAKE_CHILD);
+        AP_MONCONTROL(1);
+        /* Disable the parent's signal handlers and set up proper handling in
+         * the child.
+	 */
+	apr_signal(SIGHUP, just_die);
+	apr_signal(SIGTERM, just_die);
+        /* The child process doesn't do anything for AP_SIG_GRACEFUL.  
+         * Instead, the pod is used for signalling graceful restart.
+         */
+        apr_signal(AP_SIG_GRACEFUL, SIG_IGN);
+	child_main(slot);
+    }
+
+    ap_scoreboard_image->parent[slot].pid = pid;
+
+    return 0;
+}
+
+
+/* start up a bunch of children */
+static void startup_children(int number_to_start)
+{
+    int i;
+
+    for (i = 0; number_to_start && i < ap_daemons_limit; ++i) {
+	if (ap_scoreboard_image->servers[i][0].status != SERVER_DEAD) {
+	    continue;
+	}
+	if (make_child(ap_server_conf, i) < 0) {
+	    break;
+	}
+	--number_to_start;
+    }
+}
+
+
+/*
+ * idle_spawn_rate is the number of children that will be spawned on the
+ * next maintenance cycle if there aren't enough idle servers.  It is
+ * doubled up to MAX_SPAWN_RATE, and reset only when a cycle goes by
+ * without the need to spawn.
+ */
+static int idle_spawn_rate = 1;
+#ifndef MAX_SPAWN_RATE
+#define MAX_SPAWN_RATE	(32)
+#endif
+static int hold_off_on_exponential_spawning;
+
+static void perform_idle_server_maintenance(apr_pool_t *p)
+{
+    int i;
+    int to_kill;
+    int idle_count;
+    worker_score *ws;
+    int free_length;
+    int free_slots[MAX_SPAWN_RATE];
+    int last_non_dead;
+    int total_non_dead;
+
+    /* initialize the free_list */
+    free_length = 0;
+
+    to_kill = -1;
+    idle_count = 0;
+    last_non_dead = -1;
+    total_non_dead = 0;
+
+    for (i = 0; i < ap_daemons_limit; ++i) {
+	int status;
+
+	if (i >= ap_max_daemons_limit && free_length == idle_spawn_rate)
+	    break;
+	ws = &ap_scoreboard_image->servers[i][0];
+	status = ws->status;
+	if (status == SERVER_DEAD) {
+	    /* try to keep children numbers as low as possible */
+	    if (free_length < idle_spawn_rate) {
+		free_slots[free_length] = i;
+		++free_length;
+	    }
+	}
+	else {
+	    /* We consider a starting server as idle because we started it
+	     * at least a cycle ago, and if it still hasn't finished starting
+	     * then we're just going to swamp things worse by forking more.
+	     * So we hopefully won't need to fork more if we count it.
+	     * This depends on the ordering of SERVER_READY and SERVER_STARTING.
+	     */
+	    if (status <= SERVER_READY) {
+		++ idle_count;
+		/* always kill the highest numbered child if we have to...
+		 * no really well thought out reason ... other than observing
+		 * the server behaviour under linux where lower numbered children
+		 * tend to service more hits (and hence are more likely to have
+		 * their data in cpu caches).
+		 */
+		to_kill = i;
+	    }
+
+	    ++total_non_dead;
+	    last_non_dead = i;
+	}
+    }
+    ap_max_daemons_limit = last_non_dead + 1;
+    if (idle_count > ap_daemons_max_free) {
+	/* kill off one child... we use the pod because that'll cause it to
+	 * shut down gracefully, in case it happened to pick up a request
+	 * while we were counting
+	 */
+	ap_mpm_pod_signal(pod);
+	idle_spawn_rate = 1;
+    }
+    else if (idle_count < ap_daemons_min_free) {
+	/* terminate the free list */
+	if (free_length == 0) {
+	    /* only report this condition once */
+	    static int reported = 0;
+
+	    if (!reported) {
+		ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf,
+			    "server reached MaxClients setting, consider"
+			    " raising the MaxClients setting");
+		reported = 1;
+	    }
+	    idle_spawn_rate = 1;
+	}
+	else {
+	    if (idle_spawn_rate >= 8) {
+		ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf,
+		    "server seems busy, (you may need "
+		    "to increase StartServers, or Min/MaxSpareServers), "
+		    "spawning %d children, there are %d idle, and "
+		    "%d total children", idle_spawn_rate,
+		    idle_count, total_non_dead);
+	    }
+	    for (i = 0; i < free_length; ++i) {
+#ifdef TPF
+        if (make_child(ap_server_conf, free_slots[i]) == -1) {
+            if(free_length == 1) {
+                shutdown_pending = 1;
+                ap_log_error(APLOG_MARK, APLOG_EMERG, 0, ap_server_conf,
+                "No active child processes: shutting down");
+            }
+        }
+#else
+		make_child(ap_server_conf, free_slots[i]);
+#endif /* TPF */
+	    }
+	    /* the next time around we want to spawn twice as many if this
+	     * wasn't good enough, but not if we've just done a graceful
+	     */
+	    if (hold_off_on_exponential_spawning) {
+		--hold_off_on_exponential_spawning;
+	    }
+	    else if (idle_spawn_rate < MAX_SPAWN_RATE) {
+		idle_spawn_rate *= 2;
+	    }
+	}
+    }
+    else {
+	idle_spawn_rate = 1;
+    }
+}
+
+/*****************************************************************
+ * Executive routines.
+ */
+
+int ap_mpm_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s)
+{
+    int index;
+    int remaining_children_to_start;
+    apr_status_t rv;
+
+    ap_log_pid(pconf, ap_pid_fname);
+
+    first_server_limit = server_limit;
+    if (changed_limit_at_restart) {
+        ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s,
+                     "WARNING: Attempt to change ServerLimit "
+                     "ignored during restart");
+        changed_limit_at_restart = 0;
+    }
+
+    /* Initialize cross-process accept lock */
+    ap_lock_fname = apr_psprintf(_pconf, "%s.%" APR_PID_T_FMT,
+                                 ap_server_root_relative(_pconf, ap_lock_fname),
+                                 ap_my_pid);
+
+    rv = apr_proc_mutex_create(&accept_mutex, ap_lock_fname, 
+                               ap_accept_lock_mech, _pconf);
+    if (rv != APR_SUCCESS) {
+        ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,
+                     "Couldn't create accept lock");
+        mpm_state = AP_MPMQ_STOPPING;
+        return 1;
+    }
+
+#if APR_USE_SYSVSEM_SERIALIZE
+    if (ap_accept_lock_mech == APR_LOCK_DEFAULT || 
+        ap_accept_lock_mech == APR_LOCK_SYSVSEM) {
+#else
+    if (ap_accept_lock_mech == APR_LOCK_SYSVSEM) {
+#endif
+        rv = unixd_set_proc_mutex_perms(accept_mutex);
+        if (rv != APR_SUCCESS) {
+            ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,
+                         "Couldn't set permissions on cross-process lock; "
+                         "check User and Group directives");
+            mpm_state = AP_MPMQ_STOPPING;
+            return 1;
+        }
+    }
+
+    if (!is_graceful) {
+        if (ap_run_pre_mpm(s->process->pool, SB_SHARED) != OK) {
+            mpm_state = AP_MPMQ_STOPPING;
+            return 1;
+        }
+        /* fix the generation number in the global score; we just got a new,
+         * cleared scoreboard
+         */
+        ap_scoreboard_image->global->running_generation = ap_my_generation;
+    }
+
+    set_signals();
+
+    if (one_process) {
+        AP_MONCONTROL(1);
+    }
+
+    if (ap_daemons_max_free < ap_daemons_min_free + 1)	/* Don't thrash... */
+	ap_daemons_max_free = ap_daemons_min_free + 1;
+
+    /* If we're doing a graceful_restart then we're going to see a lot
+	* of children exiting immediately when we get into the main loop
+	* below (because we just sent them AP_SIG_GRACEFUL).  This happens pretty
+	* rapidly... and for each one that exits we'll start a new one until
+	* we reach at least daemons_min_free.  But we may be permitted to
+	* start more than that, so we'll just keep track of how many we're
+	* supposed to start up without the 1 second penalty between each fork.
+	*/
+    remaining_children_to_start = ap_daemons_to_start;
+    if (remaining_children_to_start > ap_daemons_limit) {
+	remaining_children_to_start = ap_daemons_limit;
+    }
+    if (!is_graceful) {
+	startup_children(remaining_children_to_start);
+	remaining_children_to_start = 0;
+    }
+    else {
+	/* give the system some time to recover before kicking into
+	    * exponential mode */
+	hold_off_on_exponential_spawning = 10;
+    }
+
+    ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf,
+		"%s configured -- resuming normal operations",
+		ap_get_server_version());
+    ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf,
+		"Server built: %s", ap_get_server_built());
+#ifdef AP_MPM_WANT_SET_ACCEPT_LOCK_MECH
+    ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf,
+		"AcceptMutex: %s (default: %s)",
+		apr_proc_mutex_name(accept_mutex),
+		apr_proc_mutex_defname());
+#endif
+    restart_pending = shutdown_pending = 0;
+
+    mpm_state = AP_MPMQ_RUNNING;
+    
+    while (!restart_pending && !shutdown_pending) {
+	int child_slot;
+        apr_exit_why_e exitwhy;
+	int status, processed_status;
+        /* this is a memory leak, but I'll fix it later. */
+	apr_proc_t pid;
+
+        ap_wait_or_timeout(&exitwhy, &status, &pid, pconf);
+
+	/* XXX: if it takes longer than 1 second for all our children
+	 * to start up and get into IDLE state then we may spawn an
+	 * extra child
+	 */
+	if (pid.pid != -1) {
+            processed_status = ap_process_child_status(&pid, exitwhy, status);
+            if (processed_status == APEXIT_CHILDFATAL) {
+                mpm_state = AP_MPMQ_STOPPING;
+                return 1;
+            }
+
+	    /* non-fatal death... note that it's gone in the scoreboard. */
+	    child_slot = find_child_by_pid(&pid);
+	    if (child_slot >= 0) {
+		(void) ap_update_child_status_from_indexes(child_slot, 0, SERVER_DEAD,
+                                                           (request_rec *) NULL);
+                if (processed_status == APEXIT_CHILDSICK) {
+                    /* child detected a resource shortage (E[NM]FILE, ENOBUFS, etc)
+                     * cut the fork rate to the minimum 
+                     */
+                    idle_spawn_rate = 1; 
+                }
+                else if (remaining_children_to_start
+		    && child_slot < ap_daemons_limit) {
+		    /* we're still doing a 1-for-1 replacement of dead
+			* children with new children
+			*/
+		    make_child(ap_server_conf, child_slot);
+		    --remaining_children_to_start;
+		}
+#if APR_HAS_OTHER_CHILD
+	    }
+	    else if (apr_proc_other_child_read(&pid, status) == 0) {
+		/* handled */
+#endif
+	    }
+	    else if (is_graceful) {
+		/* Great, we've probably just lost a slot in the
+		    * scoreboard.  Somehow we don't know about this
+		    * child.
+		    */
+		ap_log_error(APLOG_MARK, APLOG_WARNING, 
+                            0, ap_server_conf,
+			    "long lost child came home! (pid %ld)", (long)pid.pid);
+	    }
+	    /* Don't perform idle maintenance when a child dies,
+		* only do it when there's a timeout.  Remember only a
+		* finite number of children can die, and it's pretty
+		* pathological for a lot to die suddenly.
+		*/
+	    continue;
+	}
+	else if (remaining_children_to_start) {
+	    /* we hit a 1 second timeout in which none of the previous
+		* generation of children needed to be reaped... so assume
+		* they're all done, and pick up the slack if any is left.
+		*/
+	    startup_children(remaining_children_to_start);
+	    remaining_children_to_start = 0;
+	    /* In any event we really shouldn't do the code below because
+		* few of the servers we just started are in the IDLE state
+		* yet, so we'd mistakenly create an extra server.
+		*/
+	    continue;
+	}
+
+	perform_idle_server_maintenance(pconf);
+#ifdef TPF
+    shutdown_pending = os_check_server(tpf_server_name);
+    ap_check_signals();
+    sleep(1);
+#endif /*TPF */
+    }
+
+    mpm_state = AP_MPMQ_STOPPING;
+
+    if (shutdown_pending) {
+	/* Time to gracefully shut down:
+	 * Kill child processes, tell them to call child_exit, etc...
+	 */
+	if (unixd_killpg(getpgrp(), SIGTERM) < 0) {
+	    ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "killpg SIGTERM");
+	}
+	ap_reclaim_child_processes(1);		/* Start with SIGTERM */
+
+	/* cleanup pid file on normal shutdown */
+	{
+	    const char *pidfile = NULL;
+	    pidfile = ap_server_root_relative (pconf, ap_pid_fname);
+	    if ( pidfile != NULL && unlink(pidfile) == 0)
+		ap_log_error(APLOG_MARK, APLOG_INFO,
+				0, ap_server_conf,
+				"removed PID file %s (pid=%ld)",
+				pidfile, (long)getpid());
+	}
+
+	ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf,
+		    "caught SIGTERM, shutting down");
+	return 1;
+    }
+
+    /* we've been told to restart */
+    apr_signal(SIGHUP, SIG_IGN);
+    if (one_process) {
+	/* not worth thinking about */
+	return 1;
+    }
+
+    /* advance to the next generation */
+    /* XXX: we really need to make sure this new generation number isn't in
+     * use by any of the children.
+     */
+    ++ap_my_generation;
+    ap_scoreboard_image->global->running_generation = ap_my_generation;
+    
+    if (is_graceful) {
+	ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf,
+		    "Graceful restart requested, doing restart");
+
+	/* kill off the idle ones */
+        ap_mpm_pod_killpg(pod, ap_max_daemons_limit);
+
+	/* This is mostly for debugging... so that we know what is still
+	    * gracefully dealing with existing request.  This will break
+	    * in a very nasty way if we ever have the scoreboard totally
+	    * file-based (no shared memory)
+	    */
+	for (index = 0; index < ap_daemons_limit; ++index) {
+	    if (ap_scoreboard_image->servers[index][0].status != SERVER_DEAD) {
+		ap_scoreboard_image->servers[index][0].status = SERVER_GRACEFUL;
+	    }
+	}
+    }
+    else {
+	/* Kill 'em off */
+	if (unixd_killpg(getpgrp(), SIGHUP) < 0) {
+	    ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "killpg SIGHUP");
+	}
+	ap_reclaim_child_processes(0);		/* Not when just starting up */
+	ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf,
+		    "SIGHUP received.  Attempting to restart");
+    }
+
+    return 0;
+}
+
+/* This really should be a post_config hook, but the error log is already
+ * redirected by that point, so we need to do this in the open_logs phase.
+ */
+static int itk_open_logs(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
+{
+    apr_status_t rv;
+
+    pconf = p;
+    ap_server_conf = s;
+
+    if ((num_listensocks = ap_setup_listeners(ap_server_conf)) < 1) {
+        ap_log_error(APLOG_MARK, APLOG_ALERT|APLOG_STARTUP, 0, 
+                     NULL, "no listening sockets available, shutting down");
+	return DONE;
+    }
+
+    if ((rv = ap_mpm_pod_open(pconf, &pod))) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT|APLOG_STARTUP, rv, NULL,
+		"Could not open pipe-of-death.");
+        return DONE;
+    }
+    return OK;
+}
+
+static int itk_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp)
+{
+    static int restart_num = 0;
+    int no_detach, debug, foreground;
+    apr_status_t rv;
+
+    mpm_state = AP_MPMQ_STARTING;
+
+    debug = ap_exists_config_define("DEBUG");
+
+    if (debug) {
+        foreground = one_process = 1;
+        no_detach = 0;
+    }
+    else
+    {
+        no_detach = ap_exists_config_define("NO_DETACH");
+        one_process = ap_exists_config_define("ONE_PROCESS");
+        foreground = ap_exists_config_define("FOREGROUND");
+    }
+
+    /* sigh, want this only the second time around */
+    if (restart_num++ == 1) {
+	is_graceful = 0;
+
+        if (!one_process && !foreground) {
+            rv = apr_proc_detach(no_detach ? APR_PROC_DETACH_FOREGROUND
+                                           : APR_PROC_DETACH_DAEMONIZE);
+            if (rv != APR_SUCCESS) {
+                ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL,
+                             "apr_proc_detach failed");
+                return HTTP_INTERNAL_SERVER_ERROR;
+            }
+        }
+
+	parent_pid = ap_my_pid = getpid();
+    }
+
+    unixd_pre_config(ptemp);
+    ap_listen_pre_config();
+    ap_daemons_to_start = DEFAULT_START_DAEMON;
+    ap_daemons_min_free = DEFAULT_MIN_FREE_DAEMON;
+    ap_daemons_max_free = DEFAULT_MAX_FREE_DAEMON;
+    ap_daemons_limit = server_limit;
+    ap_pid_fname = DEFAULT_PIDLOG;
+    ap_lock_fname = DEFAULT_LOCKFILE;
+    ap_max_requests_per_child = DEFAULT_MAX_REQUESTS_PER_CHILD;
+    ap_extended_status = 0;
+#ifdef AP_MPM_WANT_SET_MAX_MEM_FREE
+	ap_max_mem_free = APR_ALLOCATOR_MAX_FREE_UNLIMITED;
+#endif
+
+    apr_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir));
+
+    return OK;
+}
+
+static int itk_post_read(request_rec *r)
+{
+	uid_t wanted_uid;
+	gid_t wanted_gid;
+	const char *wanted_username;
+
+	itk_server_conf *sconf =
+		(itk_server_conf *) ap_get_module_config(r->server->module_config, &mpm_itk_module);
+
+	/* Enforce MaxClientsVhost. */
+	if (sconf->max_clients_vhost > 0) {
+		int i, num_other_servers = 0;
+		for (i = 0; i < ap_daemons_limit; ++i) {
+			worker_score *ws = &ap_scoreboard_image->servers[i][0];
+			if (ws->status >= SERVER_BUSY_READ && strncmp(ws->vhost, r->server->server_hostname, 31) == 0)
+				++num_other_servers;
+		}
+
+		if (num_other_servers > sconf->max_clients_vhost) {
+    			ap_log_error(APLOG_MARK, APLOG_WARNING, 0, NULL, \
+				 "MaxClientsVhost reached for %s, refusing client.",
+				 r->server->server_hostname);
+			return HTTP_SERVICE_UNAVAILABLE;
+		}
+	}
+	strncpy(ap_scoreboard_image->servers[my_child_num][0].vhost, r->server->server_hostname, 31);
+	ap_scoreboard_image->servers[my_child_num][0].vhost[31] = 0;
+
+	wanted_uid = sconf->uid;
+	wanted_gid = sconf->gid;
+	wanted_username = sconf->username;
+	
+	if (wanted_uid == -1 || wanted_gid == -1) {
+		wanted_uid = unixd_config.user_id;
+		wanted_gid = unixd_config.group_id;
+		wanted_username = unixd_config.user_name;
+	}
+	
+	if (wanted_uid != -1 && wanted_gid != -1 && (getuid() != wanted_uid || getgid() != wanted_gid)) {
+		int err = 0;
+		if (setgid(wanted_gid)) {
+			_DBG("setgid(): %s", strerror(errno));
+			err = 1;
+		} else if (initgroups(wanted_username, wanted_gid)) {
+			_DBG("initgroups(): %s", strerror(errno));
+			err = 1;
+		} else if (setuid(wanted_uid)) {
+			_DBG("setuid(): %s", strerror(errno));
+			err = 1;
+		}
+
+		/*
+		 * Most likely a case of switching uid/gid within a persistent
+		 * connection; the RFCs allow us to just close the connection
+		 * at anytime, so we excercise our right. :-)
+		 */
+		if (err) {
+    			ap_log_error(APLOG_MARK, APLOG_WARNING, 0, NULL, \
+				 "Couldn't set uid/gid, closing connection.");
+			ap_lingering_close(r->connection);
+			exit(0);
+		}
+	}
+	return OK;
+}
+
+static void itk_hooks(apr_pool_t *p)
+{
+    /* The itk open_logs phase must run before the core's, or stderr
+     * will be redirected to a file, and the messages won't print to the
+     * console.
+     */
+    static const char *const aszSucc[] = {"core.c", NULL};
+
+#ifdef AUX3
+    (void) set42sig();
+#endif
+
+    ap_hook_open_logs(itk_open_logs, NULL, aszSucc, APR_HOOK_MIDDLE);
+    /* we need to set the MPM state before other pre-config hooks use MPM query
+     * to retrieve it, so register as REALLY_FIRST
+     */
+    ap_hook_pre_config(itk_pre_config, NULL, NULL, APR_HOOK_REALLY_FIRST);
+
+    /* set the uid as fast as possible */
+    ap_hook_post_read_request(itk_post_read, NULL, NULL, APR_HOOK_REALLY_FIRST);
+	
+}
+
+static const char *set_daemons_to_start(cmd_parms *cmd, void *dummy, const char *arg) 
+{
+    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+    if (err != NULL) {
+        return err;
+    }
+
+    ap_daemons_to_start = atoi(arg);
+    return NULL;
+}
+
+static const char *set_min_free_servers(cmd_parms *cmd, void *dummy, const char *arg)
+{
+    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+    if (err != NULL) {
+        return err;
+    }
+
+    ap_daemons_min_free = atoi(arg);
+    if (ap_daemons_min_free <= 0) {
+       ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, 
+                    "WARNING: detected MinSpareServers set to non-positive.");
+       ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, 
+                    "Resetting to 1 to avoid almost certain Apache failure.");
+       ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, 
+                    "Please read the documentation.");
+       ap_daemons_min_free = 1;
+    }
+       
+    return NULL;
+}
+
+static const char *set_max_free_servers(cmd_parms *cmd, void *dummy, const char *arg)
+{
+    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+    if (err != NULL) {
+        return err;
+    }
+
+    ap_daemons_max_free = atoi(arg);
+    return NULL;
+}
+
+static const char *set_max_clients (cmd_parms *cmd, void *dummy, const char *arg) 
+{
+    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+    if (err != NULL) {
+        return err;
+    }
+
+    ap_daemons_limit = atoi(arg);
+    if (ap_daemons_limit > server_limit) {
+       ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, 
+                    "WARNING: MaxClients of %d exceeds ServerLimit value "
+                    "of %d servers,", ap_daemons_limit, server_limit);
+       ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, 
+                    " lowering MaxClients to %d.  To increase, please "
+                    "see the ServerLimit", server_limit);
+       ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
+                    " directive.");
+       ap_daemons_limit = server_limit;
+    } 
+    else if (ap_daemons_limit < 1) {
+	ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, 
+                     "WARNING: Require MaxClients > 0, setting to 1");
+	ap_daemons_limit = 1;
+    }
+    return NULL;
+}
+
+static const char *set_server_limit (cmd_parms *cmd, void *dummy, const char *arg) 
+{
+    int tmp_server_limit;
+    
+    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+    if (err != NULL) {
+        return err;
+    }
+
+    tmp_server_limit = atoi(arg);
+    /* you cannot change ServerLimit across a restart; ignore
+     * any such attempts
+     */
+    if (first_server_limit &&
+        tmp_server_limit != server_limit) {
+        /* how do we log a message?  the error log is a bit bucket at this
+         * point; we'll just have to set a flag so that ap_mpm_run()
+         * logs a warning later
+         */
+        changed_limit_at_restart = 1;
+        return NULL;
+    }
+    server_limit = tmp_server_limit;
+    
+    if (server_limit > MAX_SERVER_LIMIT) {
+       ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, 
+                    "WARNING: ServerLimit of %d exceeds compile time limit "
+                    "of %d servers,", server_limit, MAX_SERVER_LIMIT);
+       ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, 
+                    " lowering ServerLimit to %d.", MAX_SERVER_LIMIT);
+       server_limit = MAX_SERVER_LIMIT;
+    } 
+    else if (server_limit < 1) {
+	ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, 
+                     "WARNING: Require ServerLimit > 0, setting to 1");
+	server_limit = 1;
+    }
+    return NULL;
+}
+
+static const char *assign_user_id (cmd_parms *cmd, void *dummy, const char *user_name, const char *group_name)   
+{
+	itk_server_conf *sconf =
+		(itk_server_conf *) ap_get_module_config(cmd->server->module_config, &mpm_itk_module);
+	sconf->username = strdup(user_name);
+	sconf->uid = ap_uname2id(user_name);
+	sconf->gid = ap_gname2id(group_name);
+	return NULL;
+}   
+
+static const char *set_max_clients_vhost (cmd_parms *cmd, void *dummy, const char *arg)   
+{
+	itk_server_conf *sconf =
+		(itk_server_conf *) ap_get_module_config(cmd->server->module_config, &mpm_itk_module);
+	sconf->max_clients_vhost = atoi(arg);
+	return NULL;
+}   
+
+
+static const command_rec itk_cmds[] = {
+UNIX_DAEMON_COMMANDS,
+LISTEN_COMMANDS,
+AP_INIT_TAKE1("StartServers", set_daemons_to_start, NULL, RSRC_CONF,
+              "Number of child processes launched at server startup"),
+AP_INIT_TAKE1("MinSpareServers", set_min_free_servers, NULL, RSRC_CONF,
+              "Minimum number of idle children, to handle request spikes"),
+AP_INIT_TAKE1("MaxSpareServers", set_max_free_servers, NULL, RSRC_CONF,
+              "Maximum number of idle children"),
+AP_INIT_TAKE1("MaxClients", set_max_clients, NULL, RSRC_CONF,
+              "Maximum number of children alive at the same time"),
+AP_INIT_TAKE1("ServerLimit", set_server_limit, NULL, RSRC_CONF,
+              "Maximum value of MaxClients for this run of Apache"),
+AP_INIT_TAKE2("AssignUserID", assign_user_id, NULL, RSRC_CONF,
+              "Tie a virtual host to a specific child process."),
+AP_INIT_TAKE1("MaxClientsVHost", set_max_clients_vhost, NULL, RSRC_CONF,
+              "Maximum number of children alive at the same time for this virtual host."),
+{ NULL }
+};
+
+/* == allocate an private server config structure == */
+static void *itk_create_config(apr_pool_t *p, server_rec *s)
+{
+	itk_server_conf *c = (itk_server_conf *)
+		apr_pcalloc(p, sizeof(itk_server_conf));
+	c->uid = c->gid = -1;
+	c->max_clients_vhost = -1;
+	return c;
+}
+
+
+module AP_MODULE_DECLARE_DATA mpm_itk_module = {
+    MPM20_MODULE_STUFF,
+    ap_mpm_rewrite_args,        /* hook to run before apache parses args */
+    NULL,			/* create per-directory config structure */
+    NULL,			/* merge per-directory config structures */
+    itk_create_config,	/* create per-server config structure */
+    NULL,			/* merge per-server config structures */
+    itk_cmds,		/* command apr_table_t */
+    itk_hooks,		/* register hooks */
+};
diff -Nur server/mpm/experimental/itk/mpm.h server/mpm/experimental/itk/mpm.h
--- server/mpm/experimental/itk/mpm.h	1970-01-01 01:00:00.000000000 +0100
+++ server/mpm/experimental/itk/mpm.h	2006-10-29 22:39:54.000000000 +0100
@@@@ -0,0 +1,50 @@@@
+/* Copyright 2000-2004 The Apache Software Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "httpd.h"
+#include "mpm_default.h"
+#include "scoreboard.h"
+#include "unixd.h"
+
+#ifndef APACHE_MPM_PREFORK_H
+#define APACHE_MPM_PREFORK_H
+
+#define PREFORK_MPM
+
+#define MPM_NAME "Prefork"
+
+#define AP_MPM_WANT_RECLAIM_CHILD_PROCESSES
+#define AP_MPM_WANT_WAIT_OR_TIMEOUT
+#define AP_MPM_WANT_PROCESS_CHILD_STATUS
+#define AP_MPM_WANT_SET_PIDFILE
+#define AP_MPM_WANT_SET_SCOREBOARD
+#define AP_MPM_WANT_SET_LOCKFILE
+#define AP_MPM_WANT_SET_MAX_REQUESTS
+#define AP_MPM_WANT_SET_COREDUMPDIR
+#define AP_MPM_WANT_SET_ACCEPT_LOCK_MECH
+#define AP_MPM_WANT_SIGNAL_SERVER
+#define AP_MPM_WANT_SET_MAX_MEM_FREE
+#define AP_MPM_WANT_FATAL_SIGNAL_HANDLER
+#define AP_MPM_DISABLE_NAGLE_ACCEPTED_SOCK
+
+#define AP_MPM_USES_POD 1
+#define MPM_CHILD_PID(i) (ap_scoreboard_image->parent[i].pid)
+#define MPM_NOTE_CHILD_KILLED(i) (MPM_CHILD_PID(i) = 0)
+#define MPM_ACCEPT_FUNC unixd_accept
+
+extern int ap_threads_per_child;
+extern int ap_max_daemons_limit;
+extern server_rec *ap_server_conf;
+#endif /* APACHE_MPM_PREFORK_H */
diff -Nur server/mpm/experimental/itk/mpm_default.h server/mpm/experimental/itk/mpm_default.h
--- server/mpm/experimental/itk/mpm_default.h	1970-01-01 01:00:00.000000000 +0100
+++ server/mpm/experimental/itk/mpm_default.h	2006-10-29 22:39:54.000000000 +0100
@@@@ -0,0 +1,64 @@@@
+/* Copyright 1999-2004 The Apache Software Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef APACHE_MPM_DEFAULT_H
+#define APACHE_MPM_DEFAULT_H
+
+/* Number of servers to spawn off by default --- also, if fewer than
+ * this free when the caretaker checks, it will spawn more.
+ */
+#ifndef DEFAULT_START_DAEMON
+#define DEFAULT_START_DAEMON 5
+#endif
+
+/* Maximum number of *free* server processes --- more than this, and
+ * they will die off.
+ */
+
+#ifndef DEFAULT_MAX_FREE_DAEMON
+#define DEFAULT_MAX_FREE_DAEMON 10
+#endif
+
+/* Minimum --- fewer than this, and more will be created */
+
+#ifndef DEFAULT_MIN_FREE_DAEMON
+#define DEFAULT_MIN_FREE_DAEMON 5
+#endif
+
+/* File used for accept locking, when we use a file */
+#ifndef DEFAULT_LOCKFILE
+#define DEFAULT_LOCKFILE DEFAULT_REL_RUNTIMEDIR "/accept.lock"
+#endif
+
+/* Where the main/parent process's pid is logged */
+#ifndef DEFAULT_PIDLOG
+#define DEFAULT_PIDLOG DEFAULT_REL_RUNTIMEDIR "/httpd.pid"
+#endif
+
+/*
+ * Interval, in microseconds, between scoreboard maintenance.
+ */
+#ifndef SCOREBOARD_MAINTENANCE_INTERVAL
+#define SCOREBOARD_MAINTENANCE_INTERVAL 1000000
+#endif
+
+/* Number of requests to try to handle in a single process.  If <= 0,
+ * the children don't die off.
+ */
+#ifndef DEFAULT_MAX_REQUESTS_PER_CHILD
+#define DEFAULT_MAX_REQUESTS_PER_CHILD 10000
+#endif
+
+#endif /* AP_MPM_DEFAULT_H */
@


1.1
log
@- Sync with the www/apache22 layout for mpm itk and *only* conditionally
  apply this patch. [Note, they are different revisions]

With Hat:   apache@@
@
text
@@

