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apache / httpd / a0ad84fbe89cfbd103570465d30ff14b87903f26 / . / server / mpm / winnt / mpm_winnt.c
blob: 1d0b246c54a81526e565c291036bb23624c05637 [file] [log] [blame]
/* ====================================================================
* Copyright (c) 1995-1999 The Apache Group. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* 4. The names "Apache Server" and "Apache Group" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Group and was originally based
* on public domain software written at the National Center for
* Supercomputing Applications, University of Illinois, Urbana-Champaign.
* For more information on the Apache Group and the Apache HTTP server
* project, please see <http://www.apache.org/>.
*
*/
#define CORE_PRIVATE
#include "httpd.h"
#include "http_main.h"
#include "http_log.h"
#include "http_config.h" /* for read_config */
#include "http_core.h" /* for get_remote_host */
#include "http_connection.h"
#include "ap_mpm.h"
#include "ap_config.h"
#include "ap_listen.h"
#include "multithread.h"
#include "../os/win32/getopt.h"
#include "mpm_default.h"
/*
* Actual definitions of WINNT MPM specific config globals
*/
int ap_max_requests_per_child=0;
int ap_daemons_to_start=0;
static char *mpm_pid_fname=NULL;
static int ap_threads_per_child = 0;
//static int ap_max_threads_per_child = 0;
static int workers_may_exit = 0;
static int max_requests_per_child = 0;
static int requests_this_child;
static int num_listenfds = 0;
static struct pollfd *listenfds;
static pool *pconf; /* Pool for config stuff */
static char ap_coredump_dir[MAX_STRING_LEN];
static server_rec *server_conf;
/*static int sd; ZZZ why is the global...? Only seems to be needed on Win32*/
/* 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;
#ifdef DEBUG_SIGSTOP
int raise_sigstop_flags;
#endif
/* *Non*-shared winnt.c globals... */
event *exit_event;
mutex *start_mutex;
int my_pid;
int parent_pid;
int listenmaxfd;
/* a clean exit from a child with proper cleanup
static void clean_child_exit(int code) __attribute__ ((noreturn));
void clean_child_exit(int code)
{
if (pchild) {
ap_destroy_pool(pchild);
}
exit(code);
}
*/
/*****************************************************************
* Connection structures and accounting...
*/
/* volatile just in case */
static int volatile shutdown_pending;
static int volatile restart_pending;
static int volatile is_graceful;
/*
* ap_start_shutdown() and ap_start_restart(), below, are a first stab at
* functions to initiate shutdown or restart without relying on signals.
* Previously this was initiated in sig_term() and restart() signal handlers,
* but we want to be able to start a shutdown/restart from other sources --
* e.g. on Win32, from the service manager. Now the service manager can
* call ap_start_shutdown() or ap_start_restart() as appropiate. Note that
* these functions can also be called by the child processes, since global
* variables are no longer used to pass on the required action to the parent.
*
* These should only be called from the parent process itself, since the
* parent process will use the shutdown_pending and restart_pending variables
* to determine whether to shutdown or restart. The child process should
* call signal_parent() directly to tell the parent to die -- this will
* cause neither of those variable to be set, which the parent will
* assume means something serious is wrong (which it will be, for the
* child to force an exit) and so do an exit anyway.
*/
void ap_start_shutdown(void)
{
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;
}
/* do a graceful restart if graceful == 1 */
void ap_start_restart(int graceful)
{
if (restart_pending == 1) {
/* Probably not an error - don't bother reporting it */
return;
}
restart_pending = 1;
is_graceful = graceful;
}
static void sig_term(int sig)
{
ap_start_shutdown();
}
static void restart(int sig)
{
ap_start_restart(1);
}
static ap_listen_rec *old_listeners;
static ap_listen_rec *head_listener;
static int setup_listeners(pool *pconf, server_rec *s)
{
ap_listen_rec *lr;
int num_listeners = 0;
if (ap_listen_open(pconf, s->port)) {
return 0;
}
for (lr = ap_listeners; lr; lr = lr->next) {
num_listeners++;
}
return num_listeners;
}
static int find_listener(ap_listen_rec *lr)
{
ap_listen_rec *or;
for (or = old_listeners; or; or = or->next) {
if (!memcmp(&or->local_addr, &lr->local_addr, sizeof(or->local_addr))) {
// or->used = 1;
return or->fd;
}
}
return -1;
}
static void close_unused_listeners(void)
{
ap_listen_rec *or, *next;
for (or = old_listeners; or; or = next) {
next = or->next;
// if (!or->used)
closesocket(or->fd);
free(or);
}
old_listeners = NULL;
}
/*
* Find a listener which is ready for accept(). This advances the
* head_listener global.
*/
static ap_inline ap_listen_rec *find_ready_listener(fd_set * main_fds)
//static ap_listen_rec *find_ready_listener(fd_set * main_fds)
{
ap_listen_rec *lr;
lr = head_listener;
do {
if (FD_ISSET(lr->fd, main_fds)) {
head_listener = lr->next;
return (lr);
}
lr = lr->next;
} while (lr != head_listener);
return NULL;
}
/*
* Signalling Apache on NT.
*
* Under Unix, Apache can be told to shutdown or restart by sending various
* signals (HUP, USR, TERM). On NT we don't have easy access to signals, so
* we use "events" instead. The parent apache process goes into a loop
* where it waits forever for a set of events. Two of those events are
* called
*
* apPID_shutdown
* apPID_restart
*
* (where PID is the PID of the apache parent process). When one of these
* is signalled, the Apache parent performs the appropriate action. The events
* can become signalled through internal Apache methods (e.g. if the child
* finds a fatal error and needs to kill its parent), via the service
* control manager (the control thread will signal the shutdown event when
* requested to stop the Apache service), from the -k Apache command line,
* or from any external program which finds the Apache PID from the
* httpd.pid file.
*
* The signal_parent() function, below, is used to signal one of these events.
* It can be called by any child or parent process, since it does not
* rely on global variables.
*
* On entry, type gives the event to signal. 0 means shutdown, 1 means
* graceful restart.
*/
static void signal_parent(int type)
{
HANDLE e;
char *signal_name;
extern char signal_shutdown_name[];
extern char signal_restart_name[];
/* after updating the shutdown_pending or restart flags, we need
* to wake up the parent process so it can see the changes. The
* parent will normally be waiting for either a child process
* to die, or for a signal on the "spache-signal" event. So set the
* "apache-signal" event here.
*/
if (one_process) {
return;
}
switch(type) {
case 0: signal_name = signal_shutdown_name; break;
case 1: signal_name = signal_restart_name; break;
default: return;
}
// APD2("signal_parent signalling event \"%s\"", signal_name);
e = OpenEvent(EVENT_ALL_ACCESS, FALSE, signal_name);
if (!e) {
/* Um, problem, can't signal the parent, which means we can't
* signal ourselves to die. Ignore for now...
*/
ap_log_error(APLOG_MARK, APLOG_EMERG|APLOG_WIN32ERROR, server_conf,
"OpenEvent on %s event", signal_name);
return;
}
if (SetEvent(e) == 0) {
/* Same problem as above */
ap_log_error(APLOG_MARK, APLOG_EMERG|APLOG_WIN32ERROR, server_conf,
"SetEvent on %s event", signal_name);
CloseHandle(e);
return;
}
CloseHandle(e);
}
/*****************************************************************
* Here follows a long bunch of generic server bookkeeping stuff...
*/
static void sock_disable_nagle(int s) /* ZZZ abstract */
{
/* The Nagle algorithm says that we should delay sending partial
* packets in hopes of getting more data. We don't want to do
* this; we are not telnet. There are bad interactions between
* persistent connections and Nagle's algorithm that have very severe
* performance penalties. (Failing to disable Nagle is not much of a
* problem with simple HTTP.)
*
* In spite of these problems, failure here is not a shooting offense.
*/
int just_say_no = 1;
if (setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (char *) &just_say_no,
sizeof(int)) < 0) {
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
"setsockopt: (TCP_NODELAY)");
}
}
/**********************************************************************
* Multithreaded implementation
*
* This code is fairly specific to Win32.
*
* The model used to handle requests is a set of threads. One "main"
* thread listens for new requests. When something becomes
* available, it does a select and places the newly available socket
* onto a list of "jobs" (add_job()). Then any one of a fixed number
* of "worker" threads takes the top job off the job list with
* remove_job() and handles that connection to completion. After
* the connection has finished the thread is free to take another
* job from the job list.
*
* In the code, the "main" thread is running within the worker_main()
* function. The first thing this function does is create the
* worker threads, which operate in the child_sub_main() function. The
* main thread then goes into a loop within worker_main() where they
* do a select() on the listening sockets. The select times out once
* per second so that the thread can check for an "exit" signal
* from the parent process (see below). If this signal is set, the
* thread can exit, but only after it has accepted all incoming
* connections already in the listen queue (since Win32 appears
* to through away listened but unaccepted connections when a
* process dies).
*
* Because the main and worker threads exist within a single process
* they are vulnerable to crashes or memory leaks (crashes can also
* be caused within modules, of course). There also needs to be a
* mechanism to perform restarts and shutdowns. This is done by
* creating the main & worker threads within a subprocess. A
* main process (the "parent process") creates one (or more)
* processes to do the work, then the parent sits around waiting
* for the working process to die, in which case it starts a new
* one. The parent process also handles restarts (by creating
* a new working process then signalling the previous working process
* exit ) and shutdowns (by signalling the working process to exit).
* The parent process operates within the master_main() function. This
* process also handles requests from the service manager (NT only).
*
* Signalling between the parent and working process uses a Win32
* event. Each child has a unique name for the event, which is
* passed to it with the -Z argument when the child is spawned. The
* parent sets (signals) this event to tell the child to die.
* At present all children do a graceful die - they finish all
* current jobs _and_ empty the listen queue before they exit.
* A non-graceful die would need a second event. The -Z argument in
* the child is also used to create the shutdown and restart events,
* since the prefix (apPID) contains the parent process PID.
*
* The code below starts with functions at the lowest level -
* worker threads, and works up to the top level - the main()
* function of the parent process.
*
* The scoreboard (in process memory) contains details of the worker
* threads (within the active working process). There is no shared
* "scoreboard" between processes, since only one is ever active
* at once (or at most, two, when one has been told to shutdown but
* is processes outstanding requests, and a new one has been started).
* This is controlled by a "start_mutex" which ensures only one working
* process is active at once.
**********************************************************************/
/* The code protected by #ifdef UNGRACEFUL_RESTARTS/#endif sections
* could implement a sort-of ungraceful restart for Win32. instead of
* graceful restarts.
*
* However it does not work too well because it does not intercept a
* connection already in progress (in child_sub_main()). We'd have to
* get that to poll on the exit event.
*/
/*
* Definition of jobs, shared by main and worker threads.
*/
typedef struct joblist_s {
struct joblist_s *next;
int sock;
} joblist;
/*
* Globals common to main and worker threads. This structure is not
* used by the parent process.
*/
typedef struct globals_s {
#ifdef UNGRACEFUL_RESTART
HANDLE thread_exit_event;
#else
int exit_now;
#endif
semaphore *jobsemaphore;
joblist *jobhead;
joblist *jobtail;
mutex *jobmutex;
int jobcount;
} globals;
globals allowed_globals =
{0, NULL, NULL, NULL, NULL, 0};
/*
* add_job()/remove_job() - add or remove an accepted socket from the
* list of sockets connected to clients. allowed_globals.jobmutex protects
* against multiple concurrent access to the linked list of jobs.
*/
void add_job(int sock)
{
joblist *new_job;
ap_assert(allowed_globals.jobmutex);
/* TODO: If too many jobs in queue, sleep, check for problems */
ap_acquire_mutex(allowed_globals.jobmutex);
new_job = (joblist *) malloc(sizeof(joblist));
if (new_job == NULL) {
fprintf(stderr, "Ouch! Out of memory in add_job()!\n");
}
new_job->next = NULL;
new_job->sock = sock;
if (allowed_globals.jobtail != NULL)
allowed_globals.jobtail->next = new_job;
allowed_globals.jobtail = new_job;
if (!allowed_globals.jobhead)
allowed_globals.jobhead = new_job;
allowed_globals.jobcount++;
release_semaphore(allowed_globals.jobsemaphore);
ap_release_mutex(allowed_globals.jobmutex);
}
int remove_job(void)
{
joblist *job;
int sock;
#ifdef UNGRACEFUL_RESTART
HANDLE hObjects[2];
int rv;
hObjects[0] = allowed_globals.jobsemaphore;
hObjects[1] = allowed_globals.thread_exit_event;
rv = WaitForMultipleObjects(2, hObjects, FALSE, INFINITE);
ap_assert(rv != WAIT_FAILED);
if (rv == WAIT_OBJECT_0 + 1) {
/* thread_exit_now */
// APD1("thread got exit now event");
return -1;
}
/* must be semaphore */
#else
acquire_semaphore(allowed_globals.jobsemaphore);
#endif
ap_assert(allowed_globals.jobmutex);
#ifdef UNGRACEFUL_RESTART
if (!allowed_globals.jobhead) {
#else
ap_acquire_mutex(allowed_globals.jobmutex);
if (allowed_globals.exit_now && !allowed_globals.jobhead) {
#endif
ap_release_mutex(allowed_globals.jobmutex);
return (-1);
}
job = allowed_globals.jobhead;
ap_assert(job);
allowed_globals.jobhead = job->next;
if (allowed_globals.jobhead == NULL)
allowed_globals.jobtail = NULL;
ap_release_mutex(allowed_globals.jobmutex);
sock = job->sock;
free(job);
return (sock);
}
/*
* child_sub_main() - this is the main loop for the worker threads
*
* Each thread runs within this function. They wait within remove_job()
* for a job to become available, then handle all the requests on that
* connection until it is closed, then return to remove_job().
*
* The worker thread will exit when it removes a job which contains
* socket number -1. This provides a graceful thread exit, since
* it will never exit during a connection.
*
* This code in this function is basically equivalent to the child_main()
* from the multi-process (Unix) environment, except that we
*
* - do not call child_init_modules (child init API phase)
* - block in remove_job, and when unblocked we have an already
* accepted socket, instead of blocking on a mutex or select().
*/
static void child_sub_main(int child_num)
{
NET_SIZE_T clen;
struct sockaddr sa_server;
struct sockaddr sa_client;
pool *ptrans;
int requests_this_child = 0;
int csd = -1;
int dupped_csd = -1;
int srv = 0;
/* Note: current_conn used to be a defined at file scope as follows... Since the signal code is
not being used in WIN32, make the variable local */
// static APACHE_TLS conn_rec *volatile current_conn;
conn_rec *current_conn;
ptrans = ap_make_sub_pool(pconf);
#if 0
/* ZZZ scoreboard */
(void) ap_update_child_status(child_num, SERVER_READY, (request_rec *) NULL);
#endif
/*
* Setup the jump buffers so that we can return here after a timeout.
*/
#if 0 /* ZZZ */
#if defined(USE_LONGJMP)
setjmp(jmpbuffer);
#else
sigsetjmp(jmpbuffer, 1);
#endif
#ifdef SIGURG
signal(SIGURG, timeout);
#endif
#endif
while (1) {
BUFF *conn_io;
request_rec *r;
/*
* (Re)initialize this child to a pre-connection state.
*/
#if 0 /* ZZZ Alarms... */
ap_set_callback_and_alarm(NULL, 0); /* Cancel any outstanding alarms */
#endif
#if 0 /* ZZZ what is this? It's not thread safe! */
timeout_req = NULL; /* No request in progress */
#endif
current_conn = NULL;
ap_clear_pool(ptrans);
#if 0
/* ZZZ scoreboard */
(void) ap_update_child_status(child_num, SERVER_READY,
(request_rec *) NULL);
#endif
/* Get job from the job list. This will block until a job is ready.
* If -1 is returned then the main thread wants us to exit.
*/
csd = remove_job();
if (csd == -1)
break; /* time to exit */
requests_this_child++;
ap_note_cleanups_for_socket(ptrans, csd);
/*
* We now have a connection, so set it up with the appropriate
* socket options, file descriptors, and read/write buffers.
*/
clen = sizeof(sa_server);
if (getsockname(csd, &sa_server, &clen) < 0) {
ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "getsockname");
continue;
}
clen = sizeof(sa_client);
if ((getpeername(csd, &sa_client, &clen)) < 0) {
/* get peername will fail if the input isn't a socket */
perror("getpeername");
memset(&sa_client, '\0', sizeof(sa_client));
}
sock_disable_nagle(csd);
#if 0
/* ZZZ scoreboard */
(void) ap_update_child_status(child_num, SERVER_BUSY_READ,
(request_rec *) NULL);
#endif
/* ZZZ . This will break CGIs since they need to know whether a fd is a socket or
a file handle... Fix with APR
*/
conn_io = ap_bcreate(ptrans, B_RDWR | B_SOCKET);
// conn_io = ap_bcreate(ptrans, B_RDWR);
dupped_csd = csd;
#if defined(NEED_DUPPED_CSD)
if ((dupped_csd = dup(csd)) < 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
"dup: couldn't duplicate csd");
dupped_csd = csd; /* Oh well... */
}
ap_note_cleanups_for_socket(ptrans, dupped_csd);
#endif
ap_bpushfd(conn_io, csd); /* ap_bpushfd(conn_io, csd, dupped_csd); why did we drop duped fd? */
current_conn = ap_new_connection(ptrans, server_conf, conn_io,
(struct sockaddr_in *) &sa_client,
(struct sockaddr_in *) &sa_server,
child_num, 0); /* Set my_thread_num to 0 for now */
ap_process_connection(current_conn);
}
}
void child_main(int child_num_arg)
{
/*
* Only reason for this function, is to pass in
* arguments to child_sub_main() on its stack so
* that longjump doesn't try to corrupt its local
* variables and I don't need to make those
* damn variables static/global
*/
child_sub_main(child_num_arg);
}
void cleanup_thread(thread **handles, int *thread_cnt, int thread_to_clean)
{
int i;
free_thread(handles[thread_to_clean]);
for (i = thread_to_clean; i < ((*thread_cnt) - 1); i++)
handles[i] = handles[i + 1];
(*thread_cnt)--;
}
/*
* The Win32 call WaitForMultipleObjects will only allow you to wait for
* a maximum of MAXIMUM_WAIT_OBJECTS (current 64). Since the threading
* model in the multithreaded version of apache wants to use this call,
* we are restricted to a maximum of 64 threads. This is a simplistic
* routine that will increase this size.
*/
static DWORD wait_for_many_objects(DWORD nCount, CONST HANDLE *lpHandles,
DWORD dwSeconds)
{
time_t tStopTime;
DWORD dwRet = WAIT_TIMEOUT;
DWORD dwIndex=0;
BOOL bFirst = TRUE;
tStopTime = time(NULL) + dwSeconds;
do {
if (!bFirst)
Sleep(1000);
else
bFirst = FALSE;
for (dwIndex = 0; dwIndex * MAXIMUM_WAIT_OBJECTS < nCount; dwIndex++) {
dwRet = WaitForMultipleObjects(
min(MAXIMUM_WAIT_OBJECTS,
nCount - (dwIndex * MAXIMUM_WAIT_OBJECTS)),
lpHandles + (dwIndex * MAXIMUM_WAIT_OBJECTS),
0, 0);
if (dwRet != WAIT_TIMEOUT) {
break;
}
}
} while((time(NULL) < tStopTime) && (dwRet == WAIT_TIMEOUT));
return dwRet;
}
//extern void main_control_server(void *); /* in hellop.c */
#define MAX_SELECT_ERRORS 100
/*
* Initialise the signal names, in the global variables signal_name_prefix,
* signal_restart_name and signal_shutdown_name.
*/
#define MAX_SIGNAL_NAME 30 /* Long enough for apPID_shutdown, where PID is an int */
char signal_name_prefix[MAX_SIGNAL_NAME];
char signal_restart_name[MAX_SIGNAL_NAME];
char signal_shutdown_name[MAX_SIGNAL_NAME];
static void setup_signal_names(char *prefix)
{
ap_snprintf(signal_name_prefix, sizeof(signal_name_prefix), prefix);
ap_snprintf(signal_shutdown_name, sizeof(signal_shutdown_name),
"%s_shutdown", signal_name_prefix);
ap_snprintf(signal_restart_name, sizeof(signal_restart_name),
"%s_restart", signal_name_prefix);
}
static void setup_inherited_listeners(pool *p)
{
HANDLE pipe;
ap_listen_rec *lr;
int fd;
WSAPROTOCOL_INFO WSAProtocolInfo;
DWORD BytesRead;
/* Open the pipe to the parent process to receive the inherited socket
* data. The sockets have been set to listening in the parent process.
*/
pipe = GetStdHandle(STD_INPUT_HANDLE);
/* Setup the listeners */
listenmaxfd = -1;
FD_ZERO(&listenfds);
lr = ap_listeners;
FD_ZERO(&listenfds);
for (;;) {
fd = find_listener(lr);
if (fd < 0) {
if (!ReadFile(pipe,
&WSAProtocolInfo, sizeof(WSAPROTOCOL_INFO),
&BytesRead,
(LPOVERLAPPED) NULL)){
ap_log_error(APLOG_MARK, APLOG_WIN32ERROR|APLOG_CRIT, server_conf,
"setup_inherited_listeners: Unable to read socket data from parent");
exit(1);
}
fd = WSASocket(FROM_PROTOCOL_INFO,
FROM_PROTOCOL_INFO,
FROM_PROTOCOL_INFO,
&WSAProtocolInfo,
0,
0);
if (fd == INVALID_SOCKET) {
ap_log_error(APLOG_MARK, APLOG_WIN32ERROR|APLOG_CRIT, server_conf,
"setup_inherited_listeners: WSASocket failed to get inherit the socket.");
exit(1);
}
// APD2("setup_inherited_listeners: WSASocket() returned socket %d", fd);
}
else {
ap_note_cleanups_for_socket(p, fd);
}
if (fd >= 0) {
FD_SET(fd, &listenfds);
if (fd > listenmaxfd)
listenmaxfd = fd;
}
lr->fd = fd;
if (lr->next == NULL)
break;
lr = lr->next;
}
/* turn the list into a ring */
lr->next = ap_listeners;
head_listener = ap_listeners;
close_unused_listeners();
CloseHandle(pipe);
return;
}
/*
* worker_main() is main loop for the child process. The loop in
* this function becomes the controlling thread for the actually working
* threads (which run in a loop in child_sub_main()).
*/
void worker_main(void)
{
int nthreads;
fd_set main_fds;
int srv;
int clen;
int csd;
int sd = -1; // made this local and not global
struct sockaddr_in sa_client;
int total_jobs = 0;
thread **child_handles;
int rv;
time_t end_time;
int i;
struct timeval tv;
int wait_time = 1;
HANDLE hObjects[2];
int count_select_errors = 0;
pool *pchild;
pchild = ap_make_sub_pool(pconf);
// ap_standalone = 1;
// sd = -1; ?? this variable is global in 1.3.x!
nthreads = ap_threads_per_child;
if (nthreads <= 0) /* maybe this is not needed... Should be checked in config... */
nthreads = 1;
my_pid = getpid();
ap_restart_time = time(NULL);
// reinit_scoreboard(pconf);
/*
* Wait until we have permission to start accepting connections.
* start_mutex is used to ensure that only one child ever
* goes into the listen/accept loop at once. Also wait on exit_event,
* in case we (this child) is told to die before we get a chance to
* serve any requests.
*/
hObjects[0] = (HANDLE)start_mutex;
hObjects[1] = (HANDLE)exit_event;
rv = WaitForMultipleObjects(2, hObjects, FALSE, INFINITE);
if (rv == WAIT_FAILED) {
ap_log_error(APLOG_MARK,APLOG_ERR|APLOG_WIN32ERROR, server_conf,
"Waiting for start_mutex or exit_event -- process will exit");
ap_destroy_pool(pchild);
// cleanup_scoreboard();
exit(0);
}
if (rv == WAIT_OBJECT_0 + 1) {
/* exit event signalled - exit now */
ap_destroy_pool(pchild);
// cleanup_scoreboard();
exit(0);
}
/* start_mutex obtained, continue into the select() loop */
if (one_process) {
setup_listeners(pconf, server_conf);
} else {
/* Get listeners from the parent process */
setup_inherited_listeners(pconf);
}
if (listenmaxfd == -1) {
/* Help, no sockets were made, better log something and exit */
ap_log_error(APLOG_MARK, APLOG_CRIT|APLOG_NOERRNO, NULL,
"No sockets were created for listening");
signal_parent(0); /* tell parent to die */
ap_destroy_pool(pchild);
// cleanup_scoreboard();
exit(0);
}
// set_signals();
// ap_child_init_modules(pconf, server_conf);
allowed_globals.jobsemaphore = create_semaphore(0);
allowed_globals.jobmutex = ap_create_mutex(NULL);
/* spawn off the threads */
child_handles = (thread *) alloca(nthreads * sizeof(int));
for (i = 0; i < nthreads; i++) {
child_handles[i] = create_thread((void (*)(void *)) child_main, (void *) i);
}
while (1) {
if (ap_max_requests_per_child && (total_jobs > ap_max_requests_per_child)) {
/* MaxRequestsPerChild hit...
*/
break;
}
/* Always check for the exit event being signaled.
*/
rv = WaitForSingleObject(exit_event, 0);
ap_assert((rv == WAIT_TIMEOUT) || (rv == WAIT_OBJECT_0));
if (rv == WAIT_OBJECT_0) {
// APD1("child: exit event signalled, exiting");
break;
}
tv.tv_sec = wait_time;
tv.tv_usec = 0;
memcpy(&main_fds, &listenfds, sizeof(fd_set));
srv = ap_select(listenmaxfd + 1, &main_fds, NULL, NULL, &tv);
#ifdef WIN32
if (srv == SOCKET_ERROR) {
/* Map the Win32 error into a standard Unix error condition */
errno = WSAGetLastError();
srv = -1;
}
#endif /* WIN32 */
if (srv < 0) {
/* Error occurred - if EINTR, loop around with problem */
if (errno != EINTR) {
/* A "real" error occurred, log it and increment the count of
* select errors. This count is used to ensure we don't go into
* a busy loop of continuous errors.
*/
ap_log_error(APLOG_MARK, APLOG_ERR, server_conf, "select: (listen)");
count_select_errors++;
if (count_select_errors > MAX_SELECT_ERRORS) {
ap_log_error(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, server_conf,
"Too many errors in select loop. Child process exiting.");
break;
}
}
continue;
}
count_select_errors = 0; /* reset count of errors */
if (srv == 0) {
continue;
}
{
ap_listen_rec *lr;
lr = find_ready_listener(&main_fds);
if (lr != NULL) {
sd = lr->fd;
}
}
do {
clen = sizeof(sa_client);
csd = accept(sd, (struct sockaddr *) &sa_client, &clen);
#ifdef WIN32
if (csd == INVALID_SOCKET) {
csd = -1;
errno = WSAGetLastError();
}
#endif /* WIN32 */
} while (csd < 0 && errno == EINTR);
if (csd < 0) {
#if defined(EPROTO) && defined(ECONNABORTED)
if ((errno != EPROTO) && (errno != ECONNABORTED))
#elif defined(EPROTO)
if (errno != EPROTO)
#elif defined(ECONNABORTED)
if (errno != ECONNABORTED)
#endif
ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
"accept: (client socket)");
}
else {
add_job(csd);
total_jobs++;
}
}
// APD2("process PID %d exiting", my_pid);
/* Get ready to shutdown and exit */
allowed_globals.exit_now = 1;
ap_release_mutex(start_mutex);
#ifdef UNGRACEFUL_RESTART
SetEvent(allowed_globals.thread_exit_event);
#else
for (i = 0; i < nthreads; i++) {
add_job(-1);
}
#endif
// APD2("process PID %d waiting for worker threads to exit", my_pid);
/* Wait for all your children */
end_time = time(NULL) + 180;
while (nthreads) {
rv = wait_for_many_objects(nthreads, child_handles,
end_time - time(NULL));
if (rv != WAIT_TIMEOUT) {
rv = rv - WAIT_OBJECT_0;
ap_assert((rv >= 0) && (rv < nthreads));
cleanup_thread(child_handles, &nthreads, rv);
continue;
}
break;
}
// APD2("process PID %d killing remaining worker threads", my_pid);
for (i = 0; i < nthreads; i++) {
kill_thread(child_handles[i]);
free_thread(child_handles[i]);
}
#ifdef UNGRACEFUL_RESTART
ap_assert(CloseHandle(allowed_globals.thread_exit_event));
#endif
destroy_semaphore(allowed_globals.jobsemaphore);
ap_destroy_mutex(allowed_globals.jobmutex);
// ap_child_exit_modules(pconf, server_conf);
ap_destroy_pool(pchild);
// cleanup_scoreboard();
// APD2("process PID %d exited", my_pid);
// clean_parent_exit(0);
} /* standalone_main */
/*
* Spawn a child Apache process. The child process has the command line arguments from
* argc and argv[], plus a -Z argument giving the name of an event. The child should
* open and poll or wait on this event. When it is signalled, the child should die.
* prefix is a prefix string for the event name.
*
* The child_num argument on entry contains a serial number for this child (used to create
* a unique event name). On exit, this number will have been incremented by one, ready
* for the next call.
*
* On exit, the value pointed to be *ev will contain the event created
* to signal the new child process.
*
* The return value is the handle to the child process if successful, else -1. If -1 is
* returned the error will already have been logged by ap_log_error().
*/
/**********************************************************************
* master_main - this is the parent (main) process. We create a
* child process to do the work, then sit around waiting for either
* the child to exit, or a restart or exit signal. If the child dies,
* we just respawn a new one. If we have a shutdown or graceful restart,
* tell the child to die when it is ready. If it is a non-graceful
* restart, force the child to die immediately.
**********************************************************************/
#define MAX_PROCESSES 50 /* must be < MAX_WAIT_OBJECTS-1 */
static void cleanup_process(HANDLE *handles, HANDLE *events, int position, int *processes)
{
int i;
int handle = 0;
CloseHandle(handles[position]);
CloseHandle(events[position]);
handle = (int)handles[position];
for (i = position; i < (*processes)-1; i++) {
handles[i] = handles[i + 1];
events[i] = events[i + 1];
}
(*processes)--;
// APD4("cleanup_processes: removed child in slot %d handle %d, max=%d", position, handle, *processes);
}
static int create_process(pool *p, HANDLE *handles, HANDLE *events,
int *processes, int *child_num, char *kill_event_name)
{
int rv, i;
HANDLE kill_event;
char buf[1024];
char exit_event_name[40]; /* apPID_C# */
char *pCommand;
char *pEnvBlock;
STARTUPINFO si; /* Filled in prior to call to CreateProcess */
PROCESS_INFORMATION pi; /* filled in on call to CreateProces */
LPWSAPROTOCOL_INFO lpWSAProtocolInfo;
ap_listen_rec *lr;
DWORD BytesWritten;
HANDLE hPipeRead = NULL;
HANDLE hPipeWrite = NULL;
SECURITY_ATTRIBUTES sa = {0};
sa.nLength = sizeof(sa);
sa.bInheritHandle = TRUE;
sa.lpSecurityDescriptor = NULL;
/* Build the command line. Should look something like this:
* C:/apache/bin/apache.exe -f ap_server_confname
* First, get the path to the executable...
*/
rv = GetModuleFileName(NULL, buf, sizeof(buf));
if (rv == sizeof(buf)) {
ap_log_error(APLOG_MARK, APLOG_WIN32ERROR | APLOG_CRIT, server_conf,
"Parent: Path to Apache process too long");
return -1;
} else if (rv == 0) {
ap_log_error(APLOG_MARK, APLOG_WIN32ERROR | APLOG_CRIT, server_conf,
"Parent: GetModuleFileName() returned NULL for current process.");
return -1;
}
/* Create the exit event (apPID_C#). Parent signals this event to tell the
* child to exit
*/
ap_snprintf(exit_event_name, sizeof(exit_event_name), "%s_C%d", kill_event_name, ++(*child_num));
kill_event = CreateEvent(NULL, TRUE, FALSE, exit_event_name);
if (!kill_event) {
ap_log_error(APLOG_MARK, APLOG_WIN32ERROR | APLOG_CRIT, server_conf,
"Parent: Could not create exit event for child process");
return -1;
}
// pCommand = ap_psprintf(p, "\"%s\" -f \"%s\"", buf, ap_server_confname);
pCommand = ap_psprintf(p, "\"%s\" -f \"%s\"", buf, SERVER_CONFIG_FILE);
/* Create a pipe to send socket info to the child */
if (!CreatePipe(&hPipeRead, &hPipeWrite, &sa, 0)) {
ap_log_error(APLOG_MARK, APLOG_WIN32ERROR | APLOG_CRIT, server_conf,
"Parent: Unable to create pipe to child process.\n");
return -1;
}
pEnvBlock = ap_psprintf(p, "AP_PARENT_PID=%d\0AP_CHILD_NUM=%d\0\0",parent_pid,*child_num);
/* Give the read in of the pipe (hPipeRead) to the child as stdin. The
* parent will write the socket data to the child on this pipe.
*/
memset(&si, 0, sizeof(si));
memset(&pi, 0, sizeof(pi));
si.cb = sizeof(si);
si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
si.wShowWindow = SW_HIDE;
si.hStdInput = hPipeRead;
if (!CreateProcess(NULL, pCommand, NULL, NULL,
TRUE, /* Inherit handles */
0, /* Creation flags */
pEnvBlock, /* Environment block */
NULL,
&si, &pi)) {
ap_log_error(APLOG_MARK, APLOG_WIN32ERROR | APLOG_CRIT, server_conf,
"Parent: Not able to create the child process.");
/*
* We must close the handles to the new process and its main thread
* to prevent handle and memory leaks.
*/
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
return -1;
}
else {
ap_log_error(APLOG_MARK, APLOG_NOERRNO | APLOG_INFO, server_conf,
"Parent: Created child process %d", pi.dwProcessId);
/* Assume the child process lives. Update the process and event tables */
handles[*processes] = pi.hProcess;
events[*processes] = kill_event;
(*processes)++;
/* We never store the thread's handle, so close it now. */
CloseHandle(pi.hThread);
/* Run the chain of open sockets. For each socket, duplicate it
* for the target process then send the WSAPROTOCOL_INFO
* (returned by dup socket) to the child */
lr = ap_listeners;
while (lr != NULL) {
lpWSAProtocolInfo = ap_pcalloc(p, sizeof(WSAPROTOCOL_INFO));
ap_log_error(APLOG_MARK, APLOG_NOERRNO | APLOG_INFO, server_conf,
"Parent: Duplicating socket %d and sending it to child process %d", lr->fd, pi.dwProcessId);
if (WSADuplicateSocket(lr->fd,
pi.dwProcessId,
lpWSAProtocolInfo) == SOCKET_ERROR) {
ap_log_error(APLOG_MARK, APLOG_WIN32ERROR | APLOG_CRIT, server_conf,
"Parent: WSADuplicateSocket failed for socket %d.", lr->fd );
return -1;
}
if (!WriteFile(hPipeWrite, lpWSAProtocolInfo, (DWORD) sizeof(WSAPROTOCOL_INFO),
&BytesWritten,
(LPOVERLAPPED) NULL)) {
ap_log_error(APLOG_MARK, APLOG_WIN32ERROR | APLOG_CRIT, server_conf,
"Parent: Unable to write duplicated socket %d to the child.", lr->fd );
return -1;
}
lr = lr->next;
if (lr == ap_listeners)
break;
}
}
CloseHandle(hPipeRead);
CloseHandle(hPipeWrite);
return 0;
}
/* To share the semaphores with other processes, we need a NULL ACL
* Code from MS KB Q106387
*/
static PSECURITY_ATTRIBUTES GetNullACL()
{
PSECURITY_DESCRIPTOR pSD;
PSECURITY_ATTRIBUTES sa;
sa = (PSECURITY_ATTRIBUTES) LocalAlloc(LPTR, sizeof(SECURITY_ATTRIBUTES));
pSD = (PSECURITY_DESCRIPTOR) LocalAlloc(LPTR,
SECURITY_DESCRIPTOR_MIN_LENGTH);
if (pSD == NULL || sa == NULL) {
return NULL;
}
if (!InitializeSecurityDescriptor(pSD, SECURITY_DESCRIPTOR_REVISION)
|| GetLastError()) {
LocalFree( pSD );
LocalFree( sa );
return NULL;
}
if (!SetSecurityDescriptorDacl(pSD, TRUE, (PACL) NULL, FALSE)
|| GetLastError()) {
LocalFree( pSD );
LocalFree( sa );
return NULL;
}
sa->nLength = sizeof(sa);
sa->lpSecurityDescriptor = pSD;
sa->bInheritHandle = TRUE;
return sa;
}
static void CleanNullACL( void *sa ) {
if( sa ) {
LocalFree( ((PSECURITY_ATTRIBUTES)sa)->lpSecurityDescriptor);
LocalFree( sa );
}
}
static int master_main(server_rec *s, HANDLE shutdown_event, HANDLE restart_event)
{
int remaining_children_to_start = ap_daemons_to_start;
int i;
int rv, cld;
int child_num = 0;
int restart_pending = 0;
int shutdown_pending = 0;
int current_live_processes = 0; /* number of child process we know about */
HANDLE process_handles[MAX_PROCESSES];
HANDLE process_kill_events[MAX_PROCESSES];
/* Create child process
* Should only be one in this version of Apache for WIN32
*/
while (remaining_children_to_start--) {
if (create_process(pconf, process_handles, process_kill_events,
&current_live_processes, &child_num, signal_prefix_string) < 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
"master_main: create child process failed. Exiting.");
shutdown_pending = 1;
goto die_now;
}
}
/* service_set_status(SERVICE_RUNNING);*/
restart_pending = shutdown_pending = 0;
/* Wait for shutdown or restart events or for child death */
process_handles[current_live_processes] = shutdown_event;
process_handles[current_live_processes+1] = restart_event;
rv = WaitForMultipleObjects(current_live_processes+2, (HANDLE *)process_handles,
FALSE, INFINITE);
cld = rv - WAIT_OBJECT_0;
if (rv == WAIT_FAILED) {
/* Something serious is wrong */
ap_log_error(APLOG_MARK,APLOG_CRIT|APLOG_WIN32ERROR, server_conf,
"master_main: : WaitForMultipeObjects on process handles and apache-signal -- doing shutdown");
shutdown_pending = 1;
}
else if (rv == WAIT_TIMEOUT) {
/* Hey, this cannot happen */
ap_log_error(APLOG_MARK, APLOG_ERR, s,
"master_main: WaitForMultipeObjects with INFINITE wait exited with WAIT_TIMEOUT");
shutdown_pending = 1;
}
else if (cld == current_live_processes) {
/* shutdown_event signalled */
shutdown_pending = 1;
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, s,
"master_main: Shutdown event signaled. Shutting the server down.");
if (ResetEvent(shutdown_event) == 0) {
ap_log_error(APLOG_MARK, APLOG_ERR|APLOG_WIN32ERROR, s,
"ResetEvent(shutdown_event)");
}
/* Signal each child processes to die */
for (i = 0; i < current_live_processes; i++) {
// APD3("master_main: signalling child %d, handle %d to die", i, process_handles[i]);
if (SetEvent(process_kill_events[i]) == 0)
ap_log_error(APLOG_MARK,APLOG_ERR|APLOG_WIN32ERROR, server_conf,
"master_main: SetEvent for child process in slot #%d failed", i);
}
}
else if (cld == current_live_processes+1) {
/* restart_event signalled */
int children_to_kill = current_live_processes;
restart_pending = 1;
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, s,
"master_main: Restart event signaled. Doing a graceful restart.");
if (ResetEvent(restart_event) == 0) {
ap_log_error(APLOG_MARK, APLOG_ERR|APLOG_WIN32ERROR, s,
"master_main: ResetEvent(restart_event) failed.");
}
/* Signal each child process to die
* We are making a big assumption here that the child process, once signaled,
* will REALLY go away. Since this is a restart, we do not want to hold the
* new child process up waiting for the old child to die. Remove the old
* child out of the process_handles table and hope for the best...
*/
for (i = 0; i < children_to_kill; i++) {
/* APD3("master_main: signalling child #%d handle %d to die", i, process_handles[i]); */
if (SetEvent(process_kill_events[i]) == 0)
ap_log_error(APLOG_MARK, APLOG_ERR|APLOG_WIN32ERROR, s,
"master_main: SetEvent for child process in slot #%d failed", i);
cleanup_process(process_handles, process_kill_events, i, &current_live_processes);
}
}
else {
/* A child process must have exited because of MaxRequestPerChild being hit
* or a fatal error condition (seg fault, etc.). Remove the dead process
* from the process_handles and process_kill_events table and create a new
* child process.
* TODO: Consider restarting the child immediately without looping through http_main
* and without rereading the configuration. Will need this if we ever support multiple
* children. One option, create a parent thread which waits on child death and restarts it.
*/
restart_pending = 1;
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, server_conf,
"master_main: Child processed exited (due to MaxRequestsPerChild?). Restarting the child process.");
ap_assert(cld < current_live_processes);
cleanup_process(process_handles, process_kill_events, cld, &current_live_processes);
/* APD2("main_process: child in slot %d died", rv); */
/* restart_child(process_hancles, process_kill_events, cld, &current_live_processes); */
}
die_now:
if (shutdown_pending) {
int tmstart = time(NULL);
while (current_live_processes && ((tmstart+60) > time(NULL))) {
rv = WaitForMultipleObjects(current_live_processes, (HANDLE *)process_handles, FALSE, 2000);
if (rv == WAIT_TIMEOUT)
continue;
ap_assert(rv != WAIT_FAILED);
cld = rv - WAIT_OBJECT_0;
ap_assert(rv < current_live_processes);
// APD4("main_process: child in #%d handle %d died, left=%d",
// rv, process_handles[rv], current_live_processes);
cleanup_process(process_handles, process_kill_events, cld, &current_live_processes);
}
for (i = 0; i < current_live_processes; i++) {
ap_log_error(APLOG_MARK,APLOG_ERR|APLOG_NOERRNO, server_conf,
"forcing termination of child #%d (handle %d)", i, process_handles[i]);
TerminateProcess((HANDLE) process_handles[i], 1);
}
return (0); /* Tell the caller we are shutting down */
}
return (1); /* Tell the call we want a restart */
}
/*
* winnt_pre_config()
* Gets called twice at startup.
*/
static void winnt_pre_config(pool *pconf, pool *plog, pool *ptemp)
{
char *pid;
one_process = !!getenv("ONE_PROCESS");
/* Track parent/child pids... */
pid = getenv("AP_PARENT_PID");
if (pid) {
/* AP_PARENT_PID is only valid in the child */
parent_pid = atoi(pid);
my_pid = getpid();
}
else {
/* This is the parent... */
parent_pid = my_pid = getpid();
ap_log_pid(pconf, mpm_pid_fname);
}
ap_listen_pre_config();
ap_daemons_to_start = DEFAULT_NUM_DAEMON;
ap_threads_per_child = DEFAULT_START_THREAD;
mpm_pid_fname = DEFAULT_PIDLOG;
max_requests_per_child = DEFAULT_MAX_REQUESTS_PER_CHILD;
ap_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir));
}
/*
Need to register this hook if we want it...
*/
static void winnt_post_config(pool *pconf, pool *plog, pool *ptemp, server_rec* server_conf)
{
server_conf = server_conf;
}
API_EXPORT(int) ap_mpm_run(pool *_pconf, pool *plog, server_rec *s )
{
int child_num;
char* exit_event_name;
int i;
time_t tmstart;
HANDLE shutdown_event; /* used to signal shutdown to parent */
HANDLE restart_event; /* used to signal a restart to parent */
pconf = _pconf;
server_conf = s;
if ((parent_pid != my_pid) || one_process) {
/* Child process */
child_num = atoi(getenv("AP_CHILD_NUM"));
exit_event_name = ap_psprintf(pconf, "ap_%d_C%d", parent_pid, child_num);
exit_event = open_event(exit_event_name);
setup_signal_names(ap_psprintf(pconf,"ap_%d", parent_pid));
start_mutex = ap_open_mutex(signal_name_prefix);
ap_assert(start_mutex);
worker_main();
destroy_event(exit_event);
}
else {
/* Parent process */
static int restart = 0;
PSECURITY_ATTRIBUTES sa = GetNullACL(); /* returns NULL if invalid (Win95?) */
ap_clear_pool(plog);
ap_open_logs(server_conf, plog);
if (!restart) {
/* service_set_status(SERVICE_START_PENDING);*/
setup_signal_names(ap_psprintf(pconf,"ap_%d", parent_pid));
/* Create shutdown event, apPID_shutdown, where PID is the parent
* Apache process ID. Shutdown is signaled by 'apache -k shutdown'.
*/
shutdown_event = CreateEvent(sa, TRUE, FALSE, signal_shutdown_name);
if (!shutdown_event) {
ap_log_error(APLOG_MARK, APLOG_EMERG|APLOG_WIN32ERROR, s,
"master_main: Cannot create shutdown event %s", signal_shutdown_name);
CleanNullACL((void *)sa);
exit(1);
}
/* Create restart event, apPID_restart, where PID is the parent
* Apache process ID. Restart is signaled by 'apache -k restart'.
*/
restart_event = CreateEvent(sa, TRUE, FALSE, signal_restart_name);
if (!restart_event) {
CloseHandle(shutdown_event);
ap_log_error(APLOG_MARK, APLOG_EMERG|APLOG_WIN32ERROR, s,
"master_main: Cannot create restart event %s", signal_restart_name);
CleanNullACL((void *)sa);
exit(1);
}
CleanNullACL((void *)sa);
/* Create the start mutex, apPID, where PID is the parent Apache process ID.
* Ths start mutex is used during a restart to prevent more than one
* child process from entering the accept loop at once.
*/
start_mutex = ap_create_mutex(signal_prefix_string);
/* TOTD: Add some code to detect failure */
}
/* Go to work... */
restart = master_main(server_conf, shutdown_event, restart_event);
if (!restart) {
const char *pidfile = NULL;
/* Shutting down. Clean up... */
pidfile = ap_server_root_relative (pconf, mpm_pid_fname);
if ( pidfile != NULL && unlink(pidfile) == 0)
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO,
server_conf,
"removed PID file %s (pid=%ld)",
pidfile, (long)getpid());
ap_destroy_mutex(start_mutex);
CloseHandle(restart_event);
CloseHandle(shutdown_event);
/* service_set_status(SERVICE_STOPPED); */
}
return !restart;
}
return (0);
}
static void winnt_hooks(void)
{
// INIT_SIGLIST()
one_process = 0;
/* Configuration hooks implemented by http_config.c ... */
ap_hook_pre_config(winnt_pre_config, NULL, NULL, HOOK_MIDDLE);
/*
ap_hook_post_config()...);
ap_hook_open_logs(xxx,NULL,NULL,HOOK_MIDDLE);
*/
/*
ap_hook_translate_name(xxx,NULL,NULL,HOOK_REALLY_LAST);
ap_hook_process_connection(xxx,NULL,NULL,
HOOK_REALLY_LAST);
ap_hook_http_method(xxx,NULL,NULL,HOOK_REALLY_LAST);
ap_hook_default_port(xxx,NULL,NULL,HOOK_REALLY_LAST);
// FIXME: I suspect we can eliminate the need for these - Ben
ap_hook_type_checker(xxx,NULL,NULL,HOOK_REALLY_LAST);
*/
}
/*
* Command processors
*/
static const char *set_pidfile(cmd_parms *cmd, void *dummy, char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
if (cmd->server->is_virtual) {
return "PidFile directive not allowed in <VirtualHost>";
}
mpm_pid_fname = arg;
return NULL;
}
static const char *set_threads_per_child (cmd_parms *cmd, void *dummy, char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
ap_threads_per_child = atoi(arg);
if (ap_threads_per_child > HARD_THREAD_LIMIT) {
fprintf(stderr, "WARNING: ThreadsPerChild of %d exceeds compile time"
"limit of %d threads,\n", ap_threads_per_child,
HARD_THREAD_LIMIT);
fprintf(stderr, " lowering ThreadsPerChild to %d. To increase, please"
"see the\n", HARD_THREAD_LIMIT);
fprintf(stderr, " HARD_THREAD_LIMIT define in src/include/httpd.h.\n");
}
else if (ap_threads_per_child < 1) {
fprintf(stderr, "WARNING: Require ThreadsPerChild > 0, setting to 1\n");
ap_threads_per_child = 1;
}
return NULL;
}
static const char *set_max_requests(cmd_parms *cmd, void *dummy, char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
max_requests_per_child = atoi(arg);
return NULL;
}
static const char *set_coredumpdir (cmd_parms *cmd, void *dummy, char *arg)
{
struct stat finfo;
const char *fname;
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
fname = ap_server_root_relative(cmd->pool, arg);
/* ZZZ change this to the AP func FileInfo*/
if ((stat(fname, &finfo) == -1) || !S_ISDIR(finfo.st_mode)) {
return ap_pstrcat(cmd->pool, "CoreDumpDirectory ", fname,
" does not exist or is not a directory", NULL);
}
ap_cpystrn(ap_coredump_dir, fname, sizeof(ap_coredump_dir));
return NULL;
}
static const command_rec winnt_cmds[] = {
LISTEN_COMMANDS
{ "PidFile", set_pidfile, NULL, RSRC_CONF, TAKE1,
"A file for logging the server process ID"},
//{ "ScoreBoardFile", set_scoreboard, NULL, RSRC_CONF, TAKE1,
// "A file for Apache to maintain runtime process management information"},
{ "ThreadsPerChild", set_threads_per_child, NULL, RSRC_CONF, TAKE1,
"Number of threads each child creates" },
{ "MaxRequestsPerChild", set_max_requests, NULL, RSRC_CONF, TAKE1,
"Maximum number of requests a particular child serves before dying." },
{ "CoreDumpDirectory", set_coredumpdir, NULL, RSRC_CONF, TAKE1,
"The location of the directory Apache changes to before dumping core" },
{ NULL }
};
module MODULE_VAR_EXPORT mpm_winnt_module = {
STANDARD20_MODULE_STUFF,
NULL, /* child_init */
NULL, /* create per-directory config structure */
NULL, /* merge per-directory config structures */
NULL, /* create per-server config structure */
NULL, /* merge per-server config structures */
winnt_cmds, /* command table */
NULL, /* handlers */
NULL, /* check auth */
NULL, /* check access */
winnt_hooks /* register_hooks */
};
/* force Expat to be linked into the server executable */
#if defined(USE_EXPAT) && !defined(SHARED_CORE_BOOTSTRAP)
#include "xmlparse.h"
const XML_LChar *suck_in_expat(void);
const XML_LChar *suck_in_expat(void)
{
return XML_ErrorString(XML_ERROR_NONE);
}
#endif /* USE_EXPAT */