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DEFINITIONS
This source file includes following definitions.
- AP_DECLARE
- AP_DECLARE
- AP_DECLARE
- set_threads_per_child
- set_thread_limit
- set_disable_acceptex
- setup_signal_names
- AP_DECLARE
- AP_DECLARE
- get_handles_from_parent
- send_handles_to_child
- get_listeners_from_parent
- send_listeners_to_child
- create_process
- master_main
- AP_DECLARE
- winnt_rewrite_args
- winnt_pre_config
- winnt_post_config
- winnt_open_logs
- winnt_child_init
- AP_DECLARE
- winnt_hooks
/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
#ifdef WIN32
#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 "apr_portable.h"
#include "apr_thread_proc.h"
#include "apr_getopt.h"
#include "apr_strings.h"
#include "apr_lib.h"
#include "apr_shm.h"
#include "apr_thread_mutex.h"
#include "ap_mpm.h"
#include "ap_config.h"
#include "ap_listen.h"
#include "mpm_default.h"
#include "mpm_winnt.h"
#include "mpm_common.h"
#include <malloc.h>
#include "apr_atomic.h"
/* scoreboard.c does the heavy lifting; all we do is create the child
* score by moving a handle down the pipe into the child's stdin.
*/
extern apr_shm_t *ap_scoreboard_shm;
server_rec *ap_server_conf;
/* Definitions of WINNT MPM specific config globals */
static HANDLE shutdown_event; /* used to signal the parent to shutdown */
static HANDLE restart_event; /* used to signal the parent to restart */
static char ap_coredump_dir[MAX_STRING_LEN];
static int one_process = 0;
static char const* signal_arg = NULL;
OSVERSIONINFO osver; /* VER_PLATFORM_WIN32_NT */
static DWORD parent_pid;
DWORD my_pid;
int ap_threads_per_child = 0;
int use_acceptex = 1;
static int thread_limit = DEFAULT_THREAD_LIMIT;
static int first_thread_limit = 0;
static int changed_limit_at_restart;
int winnt_mpm_state = AP_MPMQ_STARTING;
/* ap_my_generation are used by the scoreboard code */
ap_generation_t volatile ap_my_generation=0;
/* shared by service.c as global, although
* perhaps it should be private.
*/
apr_pool_t *pconf;
/* definitions from child.c */
void child_main(apr_pool_t *pconf);
/* used by parent to signal the child to start and exit
* NOTE: these are not sophisticated enough for multiple children
* so they ultimately should not be shared with child.c
*/
extern apr_proc_mutex_t *start_mutex;
extern HANDLE exit_event;
/* Only one of these, the pipe from our parent, ment only for
* one child worker's consumption (not to be inherited!)
* XXX: decorate this name for the trunk branch, was left simplified
* only to make the 2.2 patch trivial to read.
*/
static HANDLE pipe;
/* Stub functions until this MPM supports the connection status API */
AP_DECLARE(void) ap_update_connection_status(long conn_id, const char *key, \
const char *value)
{
/* NOP */
}
AP_DECLARE(void) ap_reset_connection_status(long conn_id)
{
/* NOP */
}
AP_DECLARE(apr_array_header_t *) ap_get_status_table(apr_pool_t *p)
{
/* NOP */
return NULL;
}
/*
* Command processors
*/
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 > thread_limit) {
ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
"WARNING: ThreadsPerChild of %d exceeds ThreadLimit "
"value of %d threads,", ap_threads_per_child,
thread_limit);
ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
" lowering ThreadsPerChild to %d. To increase, please"
" see the", thread_limit);
ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
" ThreadLimit directive.");
ap_threads_per_child = thread_limit;
}
else if (ap_threads_per_child < 1) {
ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
"WARNING: Require ThreadsPerChild > 0, setting to 1");
ap_threads_per_child = 1;
}
return NULL;
}
static const char *set_thread_limit (cmd_parms *cmd, void *dummy, const char *arg)
{
int tmp_thread_limit;
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
tmp_thread_limit = atoi(arg);
/* you cannot change ThreadLimit across a restart; ignore
* any such attempts
*/
if (first_thread_limit &&
tmp_thread_limit != thread_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;
}
thread_limit = tmp_thread_limit;
if (thread_limit > MAX_THREAD_LIMIT) {
ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
"WARNING: ThreadLimit of %d exceeds compile time limit "
"of %d threads,", thread_limit, MAX_THREAD_LIMIT);
ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
" lowering ThreadLimit to %d.", MAX_THREAD_LIMIT);
thread_limit = MAX_THREAD_LIMIT;
}
else if (thread_limit < 1) {
ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
"WARNING: Require ThreadLimit > 0, setting to 1");
thread_limit = 1;
}
return NULL;
}
static const char *set_disable_acceptex(cmd_parms *cmd, void *dummy, char *arg)
{
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
if (use_acceptex) {
use_acceptex = 0;
ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, NULL,
"Disabled use of AcceptEx() WinSock2 API");
}
return NULL;
}
static const command_rec winnt_cmds[] = {
LISTEN_COMMANDS,
AP_INIT_TAKE1("ThreadsPerChild", set_threads_per_child, NULL, RSRC_CONF,
"Number of threads each child creates" ),
AP_INIT_TAKE1("ThreadLimit", set_thread_limit, NULL, RSRC_CONF,
"Maximum worker threads in a server for this run of Apache"),
AP_INIT_NO_ARGS("Win32DisableAcceptEx", set_disable_acceptex, NULL, RSRC_CONF,
"Disable use of the high performance AcceptEx WinSock2 API to work around buggy VPN or Firewall software"),
{ 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.
*/
/*
* 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];
void setup_signal_names(char *prefix)
{
apr_snprintf(signal_name_prefix, sizeof(signal_name_prefix), prefix);
apr_snprintf(signal_shutdown_name, sizeof(signal_shutdown_name),
"%s_shutdown", signal_name_prefix);
apr_snprintf(signal_restart_name, sizeof(signal_restart_name),
"%s_restart", signal_name_prefix);
}
int volatile is_graceful = 0;
AP_DECLARE(int) ap_graceful_stop_signalled(void)
{
return is_graceful;
}
AP_DECLARE(void) ap_signal_parent(ap_signal_parent_e type)
{
HANDLE e;
char *signal_name;
if (parent_pid == my_pid) {
switch(type) {
case SIGNAL_PARENT_SHUTDOWN:
{
SetEvent(shutdown_event);
break;
}
/* This MPM supports only graceful restarts right now */
case SIGNAL_PARENT_RESTART:
case SIGNAL_PARENT_RESTART_GRACEFUL:
{
is_graceful = 1;
SetEvent(restart_event);
break;
}
}
return;
}
switch(type) {
case SIGNAL_PARENT_SHUTDOWN:
{
signal_name = signal_shutdown_name;
break;
}
/* This MPM supports only graceful restarts right now */
case SIGNAL_PARENT_RESTART:
case SIGNAL_PARENT_RESTART_GRACEFUL:
{
signal_name = signal_restart_name;
is_graceful = 1;
break;
}
default:
return;
}
e = OpenEvent(EVENT_MODIFY_STATE, 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, apr_get_os_error(), ap_server_conf,
"OpenEvent on %s event", signal_name);
return;
}
if (SetEvent(e) == 0) {
/* Same problem as above */
ap_log_error(APLOG_MARK, APLOG_EMERG, apr_get_os_error(), ap_server_conf,
"SetEvent on %s event", signal_name);
CloseHandle(e);
return;
}
CloseHandle(e);
}
/*
* Passed the following handles [in sync with send_handles_to_child()]
*
* ready event [signal the parent immediately, then close]
* exit event [save to poll later]
* start mutex [signal from the parent to begin accept()]
* scoreboard shm handle [to recreate the ap_scoreboard]
*/
void get_handles_from_parent(server_rec *s, HANDLE *child_exit_event,
apr_proc_mutex_t **child_start_mutex,
apr_shm_t **scoreboard_shm)
{
HANDLE hScore;
HANDLE ready_event;
HANDLE os_start;
DWORD BytesRead;
void *sb_shared;
apr_status_t rv;
/* *** We now do this was back in winnt_rewrite_args
* pipe = GetStdHandle(STD_INPUT_HANDLE);
*/
if (!ReadFile(pipe, &ready_event, sizeof(HANDLE),
&BytesRead, (LPOVERLAPPED) NULL)
|| (BytesRead != sizeof(HANDLE))) {
ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf,
"Child %d: Unable to retrieve the ready event from the parent", my_pid);
exit(APEXIT_CHILDINIT);
}
SetEvent(ready_event);
CloseHandle(ready_event);
if (!ReadFile(pipe, child_exit_event, sizeof(HANDLE),
&BytesRead, (LPOVERLAPPED) NULL)
|| (BytesRead != sizeof(HANDLE))) {
ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf,
"Child %d: Unable to retrieve the exit event from the parent", my_pid);
exit(APEXIT_CHILDINIT);
}
if (!ReadFile(pipe, &os_start, sizeof(os_start),
&BytesRead, (LPOVERLAPPED) NULL)
|| (BytesRead != sizeof(os_start))) {
ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf,
"Child %d: Unable to retrieve the start_mutex from the parent", my_pid);
exit(APEXIT_CHILDINIT);
}
*child_start_mutex = NULL;
if ((rv = apr_os_proc_mutex_put(child_start_mutex, &os_start, s->process->pool))
!= APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf,
"Child %d: Unable to access the start_mutex from the parent", my_pid);
exit(APEXIT_CHILDINIT);
}
if (!ReadFile(pipe, &hScore, sizeof(hScore),
&BytesRead, (LPOVERLAPPED) NULL)
|| (BytesRead != sizeof(hScore))) {
ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf,
"Child %d: Unable to retrieve the scoreboard from the parent", my_pid);
exit(APEXIT_CHILDINIT);
}
*scoreboard_shm = NULL;
if ((rv = apr_os_shm_put(scoreboard_shm, &hScore, s->process->pool))
!= APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf,
"Child %d: Unable to access the scoreboard from the parent", my_pid);
exit(APEXIT_CHILDINIT);
}
rv = ap_reopen_scoreboard(s->process->pool, scoreboard_shm, 1);
if (rv || !(sb_shared = apr_shm_baseaddr_get(*scoreboard_shm))) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL,
"Child %d: Unable to reopen the scoreboard from the parent", my_pid);
exit(APEXIT_CHILDINIT);
}
/* We must 'initialize' the scoreboard to relink all the
* process-local pointer arrays into the shared memory block.
*/
ap_init_scoreboard(sb_shared);
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf,
"Child %d: Retrieved our scoreboard from the parent.", my_pid);
}
static int send_handles_to_child(apr_pool_t *p,
HANDLE child_ready_event,
HANDLE child_exit_event,
apr_proc_mutex_t *child_start_mutex,
apr_shm_t *scoreboard_shm,
HANDLE hProcess,
apr_file_t *child_in)
{
apr_status_t rv;
HANDLE hCurrentProcess = GetCurrentProcess();
HANDLE hDup;
HANDLE os_start;
HANDLE hScore;
apr_size_t BytesWritten;
if (!DuplicateHandle(hCurrentProcess, child_ready_event, hProcess, &hDup,
EVENT_MODIFY_STATE | SYNCHRONIZE, FALSE, 0)) {
ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf,
"Parent: Unable to duplicate the ready event handle for the child");
return -1;
}
if ((rv = apr_file_write_full(child_in, &hDup, sizeof(hDup), &BytesWritten))
!= APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf,
"Parent: Unable to send the exit event handle to the child");
return -1;
}
if (!DuplicateHandle(hCurrentProcess, child_exit_event, hProcess, &hDup,
EVENT_MODIFY_STATE | SYNCHRONIZE, FALSE, 0)) {
ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf,
"Parent: Unable to duplicate the exit event handle for the child");
return -1;
}
if ((rv = apr_file_write_full(child_in, &hDup, sizeof(hDup), &BytesWritten))
!= APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf,
"Parent: Unable to send the exit event handle to the child");
return -1;
}
if ((rv = apr_os_proc_mutex_get(&os_start, child_start_mutex)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf,
"Parent: Unable to retrieve the start mutex for the child");
return -1;
}
if (!DuplicateHandle(hCurrentProcess, os_start, hProcess, &hDup,
SYNCHRONIZE, FALSE, 0)) {
ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf,
"Parent: Unable to duplicate the start mutex to the child");
return -1;
}
if ((rv = apr_file_write_full(child_in, &hDup, sizeof(hDup), &BytesWritten))
!= APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf,
"Parent: Unable to send the start mutex to the child");
return -1;
}
if ((rv = apr_os_shm_get(&hScore, scoreboard_shm)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf,
"Parent: Unable to retrieve the scoreboard handle for the child");
return -1;
}
if (!DuplicateHandle(hCurrentProcess, hScore, hProcess, &hDup,
FILE_MAP_READ | FILE_MAP_WRITE, FALSE, 0)) {
ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf,
"Parent: Unable to duplicate the scoreboard handle to the child");
return -1;
}
if ((rv = apr_file_write_full(child_in, &hDup, sizeof(hDup), &BytesWritten))
!= APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf,
"Parent: Unable to send the scoreboard handle to the child");
return -1;
}
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf,
"Parent: Sent the scoreboard to the child");
return 0;
}
/*
* get_listeners_from_parent()
* The listen sockets are opened in the parent. This function, which runs
* exclusively in the child process, receives them from the parent and
* makes them availeble in the child.
*/
void get_listeners_from_parent(server_rec *s)
{
WSAPROTOCOL_INFO WSAProtocolInfo;
ap_listen_rec *lr;
DWORD BytesRead;
int lcnt = 0;
SOCKET nsd;
/* Set up a default listener if necessary */
if (ap_listeners == NULL) {
ap_listen_rec *lr;
lr = apr_palloc(s->process->pool, sizeof(ap_listen_rec));
lr->sd = NULL;
lr->next = ap_listeners;
ap_listeners = lr;
}
/* Open the pipe to the parent process to receive the inherited socket
* data. The sockets have been set to listening in the parent process.
*
* *** We now do this was back in winnt_rewrite_args
* pipe = GetStdHandle(STD_INPUT_HANDLE);
*/
for (lr = ap_listeners; lr; lr = lr->next, ++lcnt) {
if (!ReadFile(pipe, &WSAProtocolInfo, sizeof(WSAPROTOCOL_INFO),
&BytesRead, (LPOVERLAPPED) NULL)) {
ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf,
"setup_inherited_listeners: Unable to read socket data from parent");
exit(APEXIT_CHILDINIT);
}
nsd = WSASocket(FROM_PROTOCOL_INFO, FROM_PROTOCOL_INFO, FROM_PROTOCOL_INFO,
&WSAProtocolInfo, 0, 0);
if (nsd == INVALID_SOCKET) {
ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_netos_error(), ap_server_conf,
"Child %d: setup_inherited_listeners(), WSASocket failed to open the inherited socket.", my_pid);
exit(APEXIT_CHILDINIT);
}
if (osver.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) {
HANDLE hProcess = GetCurrentProcess();
HANDLE dup;
if (DuplicateHandle(hProcess, (HANDLE) nsd, hProcess, &dup,
0, FALSE, DUPLICATE_SAME_ACCESS)) {
closesocket(nsd);
nsd = (SOCKET) dup;
}
}
else {
/* A different approach. Many users report errors such as
* (32538)An operation was attempted on something that is not
* a socket. : Parent: WSADuplicateSocket failed...
*
* This appears that the duplicated handle is no longer recognized
* as a socket handle. SetHandleInformation should overcome that
* problem by not altering the handle identifier. But this won't
* work on 9x - it's unsupported.
*/
if (!SetHandleInformation((HANDLE)nsd, HANDLE_FLAG_INHERIT, 0)) {
ap_log_error(APLOG_MARK, APLOG_ERR, apr_get_os_error(), ap_server_conf,
"set_listeners_noninheritable: SetHandleInformation failed.");
}
}
apr_os_sock_put(&lr->sd, &nsd, s->process->pool);
}
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf,
"Child %d: retrieved %d listeners from parent", my_pid, lcnt);
}
static int send_listeners_to_child(apr_pool_t *p, DWORD dwProcessId,
apr_file_t *child_in)
{
apr_status_t rv;
int lcnt = 0;
ap_listen_rec *lr;
LPWSAPROTOCOL_INFO lpWSAProtocolInfo;
apr_size_t BytesWritten;
/* 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.
*/
for (lr = ap_listeners; lr; lr = lr->next, ++lcnt) {
apr_os_sock_t nsd;
lpWSAProtocolInfo = apr_pcalloc(p, sizeof(WSAPROTOCOL_INFO));
apr_os_sock_get(&nsd,lr->sd);
ap_log_error(APLOG_MARK, APLOG_INFO, APR_SUCCESS, ap_server_conf,
"Parent: Duplicating socket %d and sending it to child process %d",
nsd, dwProcessId);
if (WSADuplicateSocket(nsd, dwProcessId,
lpWSAProtocolInfo) == SOCKET_ERROR) {
ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_netos_error(), ap_server_conf,
"Parent: WSADuplicateSocket failed for socket %d. Check the FAQ.", lr->sd );
return -1;
}
if ((rv = apr_file_write_full(child_in, lpWSAProtocolInfo,
sizeof(WSAPROTOCOL_INFO), &BytesWritten))
!= APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf,
"Parent: Unable to write duplicated socket %d to the child.", lr->sd );
return -1;
}
}
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf,
"Parent: Sent %d listeners to child %d", lcnt, dwProcessId);
return 0;
}
enum waitlist_e {
waitlist_ready = 0,
waitlist_term = 1
};
static int create_process(apr_pool_t *p, HANDLE *child_proc, HANDLE *child_exit_event,
DWORD *child_pid)
{
/* These NEVER change for the lifetime of this parent
*/
static char **args = NULL;
static char pidbuf[28];
apr_status_t rv;
apr_pool_t *ptemp;
apr_procattr_t *attr;
apr_proc_t new_child;
apr_file_t *child_out, *child_err;
HANDLE hExitEvent;
HANDLE waitlist[2]; /* see waitlist_e */
char *cmd;
char *cwd;
char **env;
int envc;
apr_pool_create_ex(&ptemp, p, NULL, NULL);
/* Build the command line. Should look something like this:
* C:/apache/bin/httpd.exe -f ap_server_confname
* First, get the path to the executable...
*/
apr_procattr_create(&attr, ptemp);
apr_procattr_cmdtype_set(attr, APR_PROGRAM);
apr_procattr_detach_set(attr, 1);
if (((rv = apr_filepath_get(&cwd, 0, ptemp)) != APR_SUCCESS)
|| ((rv = apr_procattr_dir_set(attr, cwd)) != APR_SUCCESS)) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf,
"Parent: Failed to get the current path");
}
if (!args) {
/* Build the args array, only once since it won't change
* for the lifetime of this parent process.
*/
if ((rv = ap_os_proc_filepath(&cmd, ptemp))
!= APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, ERROR_BAD_PATHNAME, ap_server_conf,
"Parent: Failed to get full path of %s",
ap_server_conf->process->argv[0]);
apr_pool_destroy(ptemp);
return -1;
}
args = malloc((ap_server_conf->process->argc + 1) * sizeof (char*));
memcpy(args + 1, ap_server_conf->process->argv + 1,
(ap_server_conf->process->argc - 1) * sizeof (char*));
args[0] = malloc(strlen(cmd) + 1);
strcpy(args[0], cmd);
args[ap_server_conf->process->argc] = NULL;
}
else {
cmd = args[0];
}
/* Create a pipe to send handles to the child */
if ((rv = apr_procattr_io_set(attr, APR_FULL_BLOCK,
APR_NO_PIPE, APR_NO_PIPE)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf,
"Parent: Unable to create child stdin pipe.");
apr_pool_destroy(ptemp);
return -1;
}
/* httpd-2.0/2.2 specific to work around apr_proc_create bugs */
/* set "NUL" as sysout for the child */
if (((rv = apr_file_open(&child_out, "NUL", APR_WRITE | APR_READ, APR_OS_DEFAULT,p))
!= APR_SUCCESS) ||
((rv = apr_procattr_child_out_set(attr, child_out, NULL))
!= APR_SUCCESS)) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf,
"Parent: Could not set child process stdout");
}
if (((rv = apr_file_open_stderr(&child_err, p))
!= APR_SUCCESS) ||
((rv = apr_procattr_child_err_set(attr, child_err, NULL))
!= APR_SUCCESS)) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf,
"Parent: Could not set child process stderr");
}
/* Create the child_ready_event */
waitlist[waitlist_ready] = CreateEvent(NULL, TRUE, FALSE, NULL);
if (!waitlist[waitlist_ready]) {
ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf,
"Parent: Could not create ready event for child process");
apr_pool_destroy (ptemp);
return -1;
}
/* Create the child_exit_event */
hExitEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
if (!hExitEvent) {
ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf,
"Parent: Could not create exit event for child process");
apr_pool_destroy(ptemp);
CloseHandle(waitlist[waitlist_ready]);
return -1;
}
/* Build the env array */
for (envc = 0; _environ[envc]; ++envc) {
;
}
env = apr_palloc(ptemp, (envc + 2) * sizeof (char*));
memcpy(env, _environ, envc * sizeof (char*));
apr_snprintf(pidbuf, sizeof(pidbuf), "AP_PARENT_PID=%i", parent_pid);
env[envc] = pidbuf;
env[envc + 1] = NULL;
rv = apr_proc_create(&new_child, cmd, args, env, attr, ptemp);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf,
"Parent: Failed to create the child process.");
apr_pool_destroy(ptemp);
CloseHandle(hExitEvent);
CloseHandle(waitlist[waitlist_ready]);
CloseHandle(new_child.hproc);
return -1;
}
apr_file_close(child_out);
ap_log_error(APLOG_MARK, APLOG_NOTICE, APR_SUCCESS, ap_server_conf,
"Parent: Created child process %d", new_child.pid);
if (send_handles_to_child(ptemp, waitlist[waitlist_ready], hExitEvent,
start_mutex, ap_scoreboard_shm,
new_child.hproc, new_child.in)) {
/*
* This error is fatal, mop up the child and move on
* We toggle the child's exit event to cause this child
* to quit even as it is attempting to start.
*/
SetEvent(hExitEvent);
apr_pool_destroy(ptemp);
CloseHandle(hExitEvent);
CloseHandle(waitlist[waitlist_ready]);
CloseHandle(new_child.hproc);
return -1;
}
/* Important:
* Give the child process a chance to run before dup'ing the sockets.
* We have already set the listening sockets noninheritable, but if
* WSADuplicateSocket runs before the child process initializes
* the listeners will be inherited anyway.
*/
waitlist[waitlist_term] = new_child.hproc;
rv = WaitForMultipleObjects(2, waitlist, FALSE, INFINITE);
CloseHandle(waitlist[waitlist_ready]);
if (rv != WAIT_OBJECT_0) {
/*
* Outch... that isn't a ready signal. It's dead, Jim!
*/
SetEvent(hExitEvent);
apr_pool_destroy(ptemp);
CloseHandle(hExitEvent);
CloseHandle(new_child.hproc);
return -1;
}
if (send_listeners_to_child(ptemp, new_child.pid, new_child.in)) {
/*
* This error is fatal, mop up the child and move on
* We toggle the child's exit event to cause this child
* to quit even as it is attempting to start.
*/
SetEvent(hExitEvent);
apr_pool_destroy(ptemp);
CloseHandle(hExitEvent);
CloseHandle(new_child.hproc);
return -1;
}
apr_file_close(new_child.in);
*child_exit_event = hExitEvent;
*child_proc = new_child.hproc;
*child_pid = new_child.pid;
return 0;
}
/***********************************************************************
* master_main()
* master_main() runs in the parent process. It creates the child
* process which handles HTTP requests then waits on one of three
* events:
*
* restart_event
* -------------
* The restart event causes master_main to start a new child process and
* tells the old child process to exit (by setting the child_exit_event).
* The restart event is set as a result of one of the following:
* 1. An apache -k restart command on the command line
* 2. A command received from Windows service manager which gets
* translated into an ap_signal_parent(SIGNAL_PARENT_RESTART)
* call by code in service.c.
* 3. The child process calling ap_signal_parent(SIGNAL_PARENT_RESTART)
* as a result of hitting MaxRequestsPerChild.
*
* shutdown_event
* --------------
* The shutdown event causes master_main to tell the child process to
* exit and that the server is shutting down. The shutdown event is
* set as a result of one of the following:
* 1. An apache -k shutdown command on the command line
* 2. A command received from Windows service manager which gets
* translated into an ap_signal_parent(SIGNAL_PARENT_SHUTDOWN)
* call by code in service.c.
*
* child process handle
* --------------------
* The child process handle will be signaled if the child process
* exits for any reason. In a normal running server, the signaling
* of this event means that the child process has exited prematurely
* due to a seg fault or other irrecoverable error. For server
* robustness, master_main will restart the child process under this
* condtion.
*
* master_main uses the child_exit_event to signal the child process
* to exit.
**********************************************************************/
#define NUM_WAIT_HANDLES 3
#define CHILD_HANDLE 0
#define SHUTDOWN_HANDLE 1
#define RESTART_HANDLE 2
static int master_main(server_rec *s, HANDLE shutdown_event, HANDLE restart_event)
{
int rv, cld;
int restart_pending;
int shutdown_pending;
HANDLE child_exit_event;
HANDLE event_handles[NUM_WAIT_HANDLES];
DWORD child_pid;
restart_pending = shutdown_pending = 0;
event_handles[SHUTDOWN_HANDLE] = shutdown_event;
event_handles[RESTART_HANDLE] = restart_event;
/* Create a single child process */
rv = create_process(pconf, &event_handles[CHILD_HANDLE],
&child_exit_event, &child_pid);
if (rv < 0)
{
ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf,
"master_main: create child process failed. Exiting.");
shutdown_pending = 1;
goto die_now;
}
if (!strcasecmp(signal_arg, "runservice")) {
mpm_service_started();
}
/* Update the scoreboard. Note that there is only a single active
* child at once.
*/
ap_scoreboard_image->parent[0].quiescing = 0;
ap_scoreboard_image->parent[0].pid = child_pid;
/* Wait for shutdown or restart events or for child death */
winnt_mpm_state = AP_MPMQ_RUNNING;
rv = WaitForMultipleObjects(NUM_WAIT_HANDLES, (HANDLE *) event_handles, FALSE, INFINITE);
cld = rv - WAIT_OBJECT_0;
if (rv == WAIT_FAILED) {
/* Something serious is wrong */
ap_log_error(APLOG_MARK,APLOG_CRIT, apr_get_os_error(), ap_server_conf,
"master_main: WaitForMultipeObjects WAIT_FAILED -- doing server shutdown");
shutdown_pending = 1;
}
else if (rv == WAIT_TIMEOUT) {
/* Hey, this cannot happen */
ap_log_error(APLOG_MARK, APLOG_ERR, apr_get_os_error(), s,
"master_main: WaitForMultipeObjects with INFINITE wait exited with WAIT_TIMEOUT");
shutdown_pending = 1;
}
else if (cld == SHUTDOWN_HANDLE) {
/* shutdown_event signalled */
shutdown_pending = 1;
ap_log_error(APLOG_MARK, APLOG_NOTICE, APR_SUCCESS, s,
"Parent: Received shutdown signal -- Shutting down the server.");
if (ResetEvent(shutdown_event) == 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, apr_get_os_error(), s,
"ResetEvent(shutdown_event)");
}
}
else if (cld == RESTART_HANDLE) {
/* Received a restart event. Prepare the restart_event to be reused
* then signal the child process to exit.
*/
restart_pending = 1;
ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, s,
"Parent: Received restart signal -- Restarting the server.");
if (ResetEvent(restart_event) == 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, apr_get_os_error(), s,
"Parent: ResetEvent(restart_event) failed.");
}
if (SetEvent(child_exit_event) == 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, apr_get_os_error(), s,
"Parent: SetEvent for child process %d failed.",
event_handles[CHILD_HANDLE]);
}
/* Don't wait to verify that the child process really exits,
* just move on with the restart.
*/
CloseHandle(event_handles[CHILD_HANDLE]);
event_handles[CHILD_HANDLE] = NULL;
}
else {
/* The child process exited prematurely due to a fatal error. */
DWORD exitcode;
if (!GetExitCodeProcess(event_handles[CHILD_HANDLE], &exitcode)) {
/* HUH? We did exit, didn't we? */
exitcode = APEXIT_CHILDFATAL;
}
if ( exitcode == APEXIT_CHILDFATAL
|| exitcode == APEXIT_CHILDINIT
|| exitcode == APEXIT_INIT) {
ap_log_error(APLOG_MARK, APLOG_CRIT, 0, ap_server_conf,
"Parent: child process exited with status %u -- Aborting.", exitcode);
shutdown_pending = 1;
}
else {
int i;
restart_pending = 1;
ap_log_error(APLOG_MARK, APLOG_NOTICE, APR_SUCCESS, ap_server_conf,
"Parent: child process exited with status %u -- Restarting.", exitcode);
for (i = 0; i < ap_threads_per_child; i++) {
ap_update_child_status_from_indexes(0, i, SERVER_DEAD, NULL);
}
}
CloseHandle(event_handles[CHILD_HANDLE]);
event_handles[CHILD_HANDLE] = NULL;
}
if (restart_pending) {
++ap_my_generation;
ap_scoreboard_image->global->running_generation = ap_my_generation;
}
die_now:
if (shutdown_pending)
{
int timeout = 30000; /* Timeout is milliseconds */
winnt_mpm_state = AP_MPMQ_STOPPING;
/* This shutdown is only marginally graceful. We will give the
* child a bit of time to exit gracefully. If the time expires,
* the child will be wacked.
*/
if (!strcasecmp(signal_arg, "runservice")) {
mpm_service_stopping();
}
/* Signal the child processes to exit */
if (SetEvent(child_exit_event) == 0) {
ap_log_error(APLOG_MARK,APLOG_ERR, apr_get_os_error(), ap_server_conf,
"Parent: SetEvent for child process %d failed", event_handles[CHILD_HANDLE]);
}
if (event_handles[CHILD_HANDLE]) {
rv = WaitForSingleObject(event_handles[CHILD_HANDLE], timeout);
if (rv == WAIT_OBJECT_0) {
ap_log_error(APLOG_MARK,APLOG_NOTICE, APR_SUCCESS, ap_server_conf,
"Parent: Child process exited successfully.");
CloseHandle(event_handles[CHILD_HANDLE]);
event_handles[CHILD_HANDLE] = NULL;
}
else {
ap_log_error(APLOG_MARK,APLOG_NOTICE, APR_SUCCESS, ap_server_conf,
"Parent: Forcing termination of child process %d ", event_handles[CHILD_HANDLE]);
TerminateProcess(event_handles[CHILD_HANDLE], 1);
CloseHandle(event_handles[CHILD_HANDLE]);
event_handles[CHILD_HANDLE] = NULL;
}
}
CloseHandle(child_exit_event);
return 0; /* Tell the caller we do not want to restart */
}
winnt_mpm_state = AP_MPMQ_STARTING;
CloseHandle(child_exit_event);
return 1; /* Tell the caller we want a restart */
}
/* service_nt_main_fn needs to append the StartService() args
* outside of our call stack and thread as the service starts...
*/
apr_array_header_t *mpm_new_argv;
/* Remember service_to_start failures to log and fail in pre_config.
* Remember inst_argc and inst_argv for installing or starting the
* service after we preflight the config.
*/
AP_DECLARE(apr_status_t) ap_mpm_query(int query_code, int *result)
{
switch(query_code){
case AP_MPMQ_MAX_DAEMON_USED:
*result = MAXIMUM_WAIT_OBJECTS;
return APR_SUCCESS;
case AP_MPMQ_IS_THREADED:
*result = AP_MPMQ_STATIC;
return APR_SUCCESS;
case AP_MPMQ_IS_FORKED:
*result = AP_MPMQ_NOT_SUPPORTED;
return APR_SUCCESS;
case AP_MPMQ_HARD_LIMIT_DAEMONS:
*result = HARD_SERVER_LIMIT;
return APR_SUCCESS;
case AP_MPMQ_HARD_LIMIT_THREADS:
*result = thread_limit;
return APR_SUCCESS;
case AP_MPMQ_MAX_THREADS:
*result = ap_threads_per_child;
return APR_SUCCESS;
case AP_MPMQ_MIN_SPARE_DAEMONS:
*result = 0;
return APR_SUCCESS;
case AP_MPMQ_MIN_SPARE_THREADS:
*result = 0;
return APR_SUCCESS;
case AP_MPMQ_MAX_SPARE_DAEMONS:
*result = 0;
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 = 0;
return APR_SUCCESS;
case AP_MPMQ_MPM_STATE:
*result = winnt_mpm_state;
return APR_SUCCESS;
}
return APR_ENOTIMPL;
}
#define SERVICE_UNSET (-1)
static apr_status_t service_set = SERVICE_UNSET;
static apr_status_t service_to_start_success;
static int inst_argc;
static const char * const *inst_argv;
static char *service_name = NULL;
void winnt_rewrite_args(process_rec *process)
{
/* Handle the following SCM aspects in this phase:
*
* -k runservice [transition for WinNT, nothing for Win9x]
* -k install
* -k config
* -k uninstall
* -k stop
* -k shutdown (same as -k stop). Maintained for backward compatability.
*
* We can't leave this phase until we know our identity
* and modify the command arguments appropriately.
*
* We do not care if the .conf file exists or is parsable when
* attempting to stop or uninstall a service.
*/
apr_status_t rv;
char *def_server_root;
char *binpath;
char optbuf[3];
const char *optarg;
int fixed_args;
char *pid;
apr_getopt_t *opt;
int running_as_service = 1;
int errout = 0;
pconf = process->pconf;
osver.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
GetVersionEx(&osver);
/* AP_PARENT_PID is only valid in the child */
pid = getenv("AP_PARENT_PID");
if (pid)
{
HANDLE filehand;
HANDLE hproc = GetCurrentProcess();
/* This is the child */
my_pid = GetCurrentProcessId();
parent_pid = (DWORD) atol(pid);
/* Prevent holding open the (nonexistant) console */
ap_real_exit_code = 0;
/* The parent gave us stdin, we need to remember this
* handle, and no longer inherit it at our children
* (we can't slurp it up now, we just aren't ready yet).
* The original handle is closed below, at apr_file_dup2()
*/
pipe = GetStdHandle(STD_INPUT_HANDLE);
if (DuplicateHandle(hproc, pipe,
hproc, &filehand, 0, FALSE,
DUPLICATE_SAME_ACCESS)) {
pipe = filehand;
}
/* The parent gave us stdout of the NUL device,
* and expects us to suck up stdin of all of our
* shared handles and data from the parent.
* Don't infect child processes with our stdin
* handle, use another handle to NUL!
*/
{
apr_file_t *infile, *outfile;
if ((apr_file_open_stdout(&outfile, process->pool) == APR_SUCCESS)
&& (apr_file_open_stdin(&infile, process->pool) == APR_SUCCESS))
apr_file_dup2(infile, outfile, process->pool);
}
/* This child needs the existing stderr opened for logging,
* already
*/
/* The parent is responsible for providing the
* COMPLETE ARGUMENTS REQUIRED to the child.
*
* No further argument parsing is needed, but
* for good measure we will provide a simple
* signal string for later testing.
*/
signal_arg = "runchild";
return;
}
/* This is the parent, we have a long way to go :-) */
parent_pid = my_pid = GetCurrentProcessId();
/* This behavior is voided by setting real_exit_code to 0 */
atexit(hold_console_open_on_error);
/* Rewrite process->argv[];
*
* strip out -k signal into signal_arg
* strip out -n servicename and set the names
* add default -d serverroot from the path of this executable
*
* The end result will look like:
*
* The invocation command (%0)
* The -d serverroot default from the running executable
* The requested service's (-n) registry ConfigArgs
* The WinNT SCM's StartService() args
*/
if ((rv = ap_os_proc_filepath(&binpath, process->pconf))
!= APR_SUCCESS) {
ap_log_error(APLOG_MARK,APLOG_CRIT, rv, NULL,
"Failed to get the full path of %s", process->argv[0]);
exit(APEXIT_INIT);
}
/* WARNING: There is an implict assumption here that the
* executable resides in ServerRoot or ServerRoot\bin
*/
def_server_root = (char *) apr_filepath_name_get(binpath);
if (def_server_root > binpath) {
*(def_server_root - 1) = '\0';
def_server_root = (char *) apr_filepath_name_get(binpath);
if (!strcasecmp(def_server_root, "bin"))
*(def_server_root - 1) = '\0';
}
apr_filepath_merge(&def_server_root, NULL, binpath,
APR_FILEPATH_TRUENAME, process->pool);
/* Use process->pool so that the rewritten argv
* lasts for the lifetime of the server process,
* because pconf will be destroyed after the
* initial pre-flight of the config parser.
*/
mpm_new_argv = apr_array_make(process->pool, process->argc + 2,
sizeof(const char *));
*(const char **)apr_array_push(mpm_new_argv) = process->argv[0];
*(const char **)apr_array_push(mpm_new_argv) = "-d";
*(const char **)apr_array_push(mpm_new_argv) = def_server_root;
fixed_args = mpm_new_argv->nelts;
optbuf[0] = '-';
optbuf[2] = '\0';
apr_getopt_init(&opt, process->pool, process->argc, (char**) process->argv);
opt->errfn = NULL;
while ((rv = apr_getopt(opt, "wn:k:" AP_SERVER_BASEARGS,
optbuf + 1, &optarg)) == APR_SUCCESS) {
switch (optbuf[1]) {
/* Shortcuts; include the -w option to hold the window open on error.
* This must not be toggled once we reset ap_real_exit_code to 0!
*/
case 'w':
if (ap_real_exit_code)
ap_real_exit_code = 2;
break;
case 'n':
service_set = mpm_service_set_name(process->pool, &service_name,
optarg);
break;
case 'k':
signal_arg = optarg;
break;
case 'E':
errout = 1;
/* Fall through so the Apache main() handles the 'E' arg */
default:
*(const char **)apr_array_push(mpm_new_argv) =
apr_pstrdup(process->pool, optbuf);
if (optarg) {
*(const char **)apr_array_push(mpm_new_argv) = optarg;
}
break;
}
}
/* back up to capture the bad argument */
if (rv == APR_BADCH || rv == APR_BADARG) {
opt->ind--;
}
while (opt->ind < opt->argc) {
*(const char **)apr_array_push(mpm_new_argv) =
apr_pstrdup(process->pool, opt->argv[opt->ind++]);
}
/* Track the number of args actually entered by the user */
inst_argc = mpm_new_argv->nelts - fixed_args;
/* Provide a default 'run' -k arg to simplify signal_arg tests */
if (!signal_arg)
{
signal_arg = "run";
running_as_service = 0;
}
if (!strcasecmp(signal_arg, "runservice"))
{
/* Start the NT Service _NOW_ because the WinNT SCM is
* expecting us to rapidly assume control of our own
* process, the SCM will tell us our service name, and
* may have extra StartService() command arguments to
* add for us.
*
* The SCM will generally invoke the executable with
* the c:\win\system32 default directory. This is very
* lethal if folks use ServerRoot /foopath on windows
* without a drive letter. Change to the default root
* (path to apache root, above /bin) for safety.
*/
apr_filepath_set(def_server_root, process->pool);
/* Any other process has a console, so we don't to begin
* a Win9x service until the configuration is parsed and
* any command line errors are reported.
*
* We hold the return value so that we can die in pre_config
* after logging begins, and the failure can land in the log.
*/
if (osver.dwPlatformId == VER_PLATFORM_WIN32_NT)
{
apr_file_t *nullfile;
if (!errout) {
mpm_nt_eventlog_stderr_open(service_name, process->pool);
}
service_to_start_success = mpm_service_to_start(&service_name,
process->pool);
if (service_to_start_success == APR_SUCCESS) {
service_set = APR_SUCCESS;
}
/* Open a null handle to soak stdout in this process.
* Windows service processes are missing any file handle
* usable for stdin/out/err. This was the cause of later
* trouble with invocations of apr_file_open_stdout()
*/
if ((rv = apr_file_open(&nullfile, "NUL",
APR_READ | APR_WRITE, APR_OS_DEFAULT,
process->pool)) == APR_SUCCESS) {
apr_file_t *nullstdout;
if (apr_file_open_stdout(&nullstdout, process->pool)
== APR_SUCCESS)
apr_file_dup2(nullstdout, nullfile, process->pool);
apr_file_close(nullfile);
}
}
}
/* Get the default for any -k option, except run */
if (service_set == SERVICE_UNSET && strcasecmp(signal_arg, "run")) {
service_set = mpm_service_set_name(process->pool, &service_name,
AP_DEFAULT_SERVICE_NAME);
}
if (!strcasecmp(signal_arg, "install")) /* -k install */
{
if (service_set == APR_SUCCESS)
{
ap_log_error(APLOG_MARK,APLOG_ERR, 0, NULL,
"%s: Service is already installed.", service_name);
exit(APEXIT_INIT);
}
}
else if (running_as_service)
{
if (service_set == APR_SUCCESS)
{
/* Attempt to Uninstall, or stop, before
* we can read the arguments or .conf files
*/
if (!strcasecmp(signal_arg, "uninstall")) {
rv = mpm_service_uninstall();
exit(rv);
}
if ((!strcasecmp(signal_arg, "stop")) ||
(!strcasecmp(signal_arg, "shutdown"))) {
mpm_signal_service(process->pool, 0);
exit(0);
}
rv = mpm_merge_service_args(process->pool, mpm_new_argv,
fixed_args);
if (rv == APR_SUCCESS) {
ap_log_error(APLOG_MARK,APLOG_INFO, 0, NULL,
"Using ConfigArgs of the installed service "
"\"%s\".", service_name);
}
else {
ap_log_error(APLOG_MARK,APLOG_WARNING, rv, NULL,
"No installed ConfigArgs for the service "
"\"%s\", using Apache defaults.", service_name);
}
}
else
{
ap_log_error(APLOG_MARK,APLOG_ERR, service_set, NULL,
"No installed service named \"%s\".", service_name);
exit(APEXIT_INIT);
}
}
if (strcasecmp(signal_arg, "install") && service_set && service_set != SERVICE_UNSET)
{
ap_log_error(APLOG_MARK,APLOG_ERR, service_set, NULL,
"No installed service named \"%s\".", service_name);
exit(APEXIT_INIT);
}
/* Track the args actually entered by the user.
* These will be used for the -k install parameters, as well as
* for the -k start service override arguments.
*/
inst_argv = (const char * const *)mpm_new_argv->elts
+ mpm_new_argv->nelts - inst_argc;
/* Now, do service install or reconfigure then proceed to
* post_config to test the installed configuration.
*/
if (!strcasecmp(signal_arg, "config")) { /* -k config */
/* Reconfigure the service */
rv = mpm_service_install(process->pool, inst_argc, inst_argv, 1);
if (rv != APR_SUCCESS) {
exit(rv);
}
fprintf(stderr,"Testing httpd.conf....\n");
fprintf(stderr,"Errors reported here must be corrected before the "
"service can be started.\n");
}
else if (!strcasecmp(signal_arg, "install")) { /* -k install */
/* Install the service */
rv = mpm_service_install(process->pool, inst_argc, inst_argv, 0);
if (rv != APR_SUCCESS) {
exit(rv);
}
fprintf(stderr,"Testing httpd.conf....\n");
fprintf(stderr,"Errors reported here must be corrected before the "
"service can be started.\n");
}
process->argc = mpm_new_argv->nelts;
process->argv = (const char * const *) mpm_new_argv->elts;
}
static int winnt_pre_config(apr_pool_t *pconf_, apr_pool_t *plog, apr_pool_t *ptemp)
{
/* Handle the following SCM aspects in this phase:
*
* -k runservice [WinNT errors logged from rewrite_args]
*/
/* Initialize shared static objects.
* TODO: Put config related statics into an sconf structure.
*/
pconf = pconf_;
if (ap_exists_config_define("ONE_PROCESS") ||
ap_exists_config_define("DEBUG"))
one_process = -1;
if (!strcasecmp(signal_arg, "runservice")
&& (osver.dwPlatformId == VER_PLATFORM_WIN32_NT)
&& (service_to_start_success != APR_SUCCESS)) {
ap_log_error(APLOG_MARK,APLOG_CRIT, service_to_start_success, NULL,
"%s: Unable to start the service manager.",
service_name);
exit(APEXIT_INIT);
}
/* Win9x: disable AcceptEx */
if (osver.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) {
use_acceptex = 0;
}
ap_listen_pre_config();
ap_threads_per_child = DEFAULT_THREADS_PER_CHILD;
ap_pid_fname = DEFAULT_PIDLOG;
ap_max_requests_per_child = DEFAULT_MAX_REQUESTS_PER_CHILD;
#ifdef AP_MPM_WANT_SET_MAX_MEM_FREE
ap_max_mem_free = APR_ALLOCATOR_MAX_FREE_UNLIMITED;
#endif
/* use_acceptex which is enabled by default is not available on Win9x.
*/
if (osver.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) {
use_acceptex = 0;
}
apr_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir));
return OK;
}
static int winnt_post_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp, server_rec* s)
{
static int restart_num = 0;
apr_status_t rv = 0;
/* Handle the following SCM aspects in this phase:
*
* -k install (catch and exit as install was handled in rewrite_args)
* -k config (catch and exit as config was handled in rewrite_args)
* -k start
* -k restart
* -k runservice [Win95, only once - after we parsed the config]
*
* because all of these signals are useful _only_ if there
* is a valid conf\httpd.conf environment to start.
*
* We reached this phase by avoiding errors that would cause
* these options to fail unexpectedly in another process.
*/
if (!strcasecmp(signal_arg, "install")) {
/* Service install happens in the rewrite_args hooks. If we
* made it this far, the server configuration is clean and the
* service will successfully start.
*/
apr_pool_destroy(s->process->pool);
apr_terminate();
exit(0);
}
if (!strcasecmp(signal_arg, "config")) {
/* Service reconfiguration happens in the rewrite_args hooks. If we
* made it this far, the server configuration is clean and the
* service will successfully start.
*/
apr_pool_destroy(s->process->pool);
apr_terminate();
exit(0);
}
if (!strcasecmp(signal_arg, "start")) {
ap_listen_rec *lr;
/* Close the listening sockets. */
for (lr = ap_listeners; lr; lr = lr->next) {
apr_socket_close(lr->sd);
lr->active = 0;
}
rv = mpm_service_start(ptemp, inst_argc, inst_argv);
apr_pool_destroy(s->process->pool);
apr_terminate();
exit (rv);
}
if (!strcasecmp(signal_arg, "restart")) {
mpm_signal_service(ptemp, 1);
apr_pool_destroy(s->process->pool);
apr_terminate();
exit (rv);
}
if (parent_pid == my_pid)
{
if (restart_num++ == 1)
{
/* This code should be run once in the parent and not run
* across a restart
*/
PSECURITY_ATTRIBUTES sa = GetNullACL(); /* returns NULL if invalid (Win95?) */
setup_signal_names(apr_psprintf(pconf,"ap%d", parent_pid));
ap_log_pid(pconf, ap_pid_fname);
/* Create shutdown event, apPID_shutdown, where PID is the parent
* Apache process ID. Shutdown is signaled by 'apache -k shutdown'.
*/
shutdown_event = CreateEvent(sa, FALSE, FALSE, signal_shutdown_name);
if (!shutdown_event) {
ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf,
"Parent: Cannot create shutdown event %s", signal_shutdown_name);
CleanNullACL((void *)sa);
return HTTP_INTERNAL_SERVER_ERROR;
}
/* Create restart event, apPID_restart, where PID is the parent
* Apache process ID. Restart is signaled by 'apache -k restart'.
*/
restart_event = CreateEvent(sa, FALSE, FALSE, signal_restart_name);
if (!restart_event) {
CloseHandle(shutdown_event);
ap_log_error(APLOG_MARK, APLOG_CRIT, apr_get_os_error(), ap_server_conf,
"Parent: Cannot create restart event %s", signal_restart_name);
CleanNullACL((void *)sa);
return HTTP_INTERNAL_SERVER_ERROR;
}
CleanNullACL((void *)sa);
/* Now that we are flying at 15000 feet...
* wipe out the Win95 service console,
* signal the SCM the WinNT service started, or
* if not a service, setup console handlers instead.
*/
if (!strcasecmp(signal_arg, "runservice"))
{
if (osver.dwPlatformId != VER_PLATFORM_WIN32_NT)
{
rv = mpm_service_to_start(&service_name,
s->process->pool);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK,APLOG_ERR, rv, ap_server_conf,
"%s: Unable to start the service manager.",
service_name);
return HTTP_INTERNAL_SERVER_ERROR;
}
}
}
/* Create the start mutex, as an unnamed object for security.
* Ths start mutex is used during a restart to prevent more than
* one child process from entering the accept loop at once.
*/
rv = apr_proc_mutex_create(&start_mutex, NULL,
APR_LOCK_DEFAULT,
ap_server_conf->process->pool);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK,APLOG_ERR, rv, ap_server_conf,
"%s: Unable to create the start_mutex.",
service_name);
return HTTP_INTERNAL_SERVER_ERROR;
}
}
/* Always reset our console handler to be the first, even on a restart
* because some modules (e.g. mod_perl) might have set a console
* handler to terminate the process.
*/
if (strcasecmp(signal_arg, "runservice"))
mpm_start_console_handler();
}
else /* parent_pid != my_pid */
{
mpm_start_child_console_handler();
}
return OK;
}
/* 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 winnt_open_logs(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
{
/* Initialize shared static objects.
*/
ap_server_conf = s;
if (parent_pid != my_pid) {
return OK;
}
/* We cannot initialize our listeners if we are restarting
* (the parent process already has glomed on to them)
* nor should we do so for service reconfiguration
* (since the service may already be running.)
*/
if (!strcasecmp(signal_arg, "restart")
|| !strcasecmp(signal_arg, "config")) {
return OK;
}
if (ap_setup_listeners(s) < 1) {
ap_log_error(APLOG_MARK, APLOG_ALERT|APLOG_STARTUP, 0,
NULL, "no listening sockets available, shutting down");
return DONE;
}
return OK;
}
static void winnt_child_init(apr_pool_t *pchild, struct server_rec *s)
{
apr_status_t rv;
setup_signal_names(apr_psprintf(pchild,"ap%d", parent_pid));
/* This is a child process, not in single process mode */
if (!one_process) {
/* Set up events and the scoreboard */
get_handles_from_parent(s, &exit_event, &start_mutex,
&ap_scoreboard_shm);
/* Set up the listeners */
get_listeners_from_parent(s);
/* Done reading from the parent, close that channel */
CloseHandle(pipe);
ap_my_generation = ap_scoreboard_image->global->running_generation;
}
else {
/* Single process mode - this lock doesn't even need to exist */
rv = apr_proc_mutex_create(&start_mutex, signal_name_prefix,
APR_LOCK_DEFAULT, s->process->pool);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK,APLOG_ERR, rv, ap_server_conf,
"%s child %d: Unable to init the start_mutex.",
service_name, my_pid);
exit(APEXIT_CHILDINIT);
}
/* Borrow the shutdown_even as our _child_ loop exit event */
exit_event = shutdown_event;
}
}
AP_DECLARE(int) ap_mpm_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s )
{
static int restart = 0; /* Default is "not a restart" */
if (!restart) {
first_thread_limit = thread_limit;
}
if (changed_limit_at_restart) {
ap_log_error(APLOG_MARK, APLOG_WARNING, APR_SUCCESS, ap_server_conf,
"WARNING: Attempt to change ThreadLimit ignored "
"during restart");
changed_limit_at_restart = 0;
}
/* ### If non-graceful restarts are ever introduced - we need to rerun
* the pre_mpm hook on subsequent non-graceful restarts. But Win32
* has only graceful style restarts - and we need this hook to act
* the same on Win32 as on Unix.
*/
if (!restart && ((parent_pid == my_pid) || one_process)) {
/* Set up the scoreboard. */
if (ap_run_pre_mpm(s->process->pool, SB_SHARED) != OK) {
return 1;
}
}
if ((parent_pid != my_pid) || one_process)
{
/* The child process or in one_process (debug) mode
*/
ap_log_error(APLOG_MARK, APLOG_NOTICE, APR_SUCCESS, ap_server_conf,
"Child %d: Child process is running", my_pid);
child_main(pconf);
ap_log_error(APLOG_MARK, APLOG_NOTICE, APR_SUCCESS, ap_server_conf,
"Child %d: Child process is exiting", my_pid);
return 1;
}
else
{
/* A real-honest to goodness parent */
ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf,
"%s configured -- resuming normal operations",
ap_get_server_description());
ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf,
"Server built: %s", ap_get_server_built());
restart = master_main(ap_server_conf, shutdown_event, restart_event);
if (!restart)
{
/* Shutting down. Clean up... */
const char *pidfile = ap_server_root_relative (pconf, ap_pid_fname);
if (pidfile != NULL && unlink(pidfile) == 0) {
ap_log_error(APLOG_MARK, APLOG_INFO, APR_SUCCESS,
ap_server_conf, "removed PID file %s (pid=%ld)",
pidfile, GetCurrentProcessId());
}
apr_proc_mutex_destroy(start_mutex);
CloseHandle(restart_event);
CloseHandle(shutdown_event);
return 1;
}
}
return 0; /* Restart */
}
static void winnt_hooks(apr_pool_t *p)
{
/* The prefork 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};
ap_hook_pre_config(winnt_pre_config, NULL, NULL, APR_HOOK_MIDDLE);
ap_hook_post_config(winnt_post_config, NULL, NULL, 0);
ap_hook_child_init(winnt_child_init, NULL, NULL, APR_HOOK_MIDDLE);
ap_hook_open_logs(winnt_open_logs, NULL, aszSucc, APR_HOOK_MIDDLE);
}
AP_MODULE_DECLARE_DATA module mpm_winnt_module = {
MPM20_MODULE_STUFF,
winnt_rewrite_args, /* hook to run before apache parses args */
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 apr_table_t */
winnt_hooks /* register_hooks */
};
#endif /* def WIN32 */