5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#include "apr.h"

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#include "apr_portable.h"

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#include "apr_strings.h"

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#include "apr_thread_proc.h"

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#include "apr_signal.h"

60a4b2c422dcbb08a554fb193105c08da592718bpoirier

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#define APR_WANT_STDIO

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#define APR_WANT_STRFUNC

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#include "apr_want.h"

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#if APR_HAVE_UNISTD_H

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#include <unistd.h>

a04dcd330b05345681a4057702b2d43b2042e21dtrawick#endif

a04dcd330b05345681a4057702b2d43b2042e21dtrawick#if APR_HAVE_SYS_TYPES_H

a04dcd330b05345681a4057702b2d43b2042e21dtrawick#include <sys/types.h>

a04dcd330b05345681a4057702b2d43b2042e21dtrawick#endif

f8b7daeb0e3f0ac4544fcc665de10c6b69a1ce0dsf

f8b7daeb0e3f0ac4544fcc665de10c6b69a1ce0dsf#define CORE_PRIVATE

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#include "ap_config.h"

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#include "httpd.h"

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#include "mpm_default.h"

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#include "http_main.h"

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#include "http_log.h"

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#include "http_config.h"

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#include "http_core.h" /* for get_remote_host */

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#include "http_connection.h"

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#include "scoreboard.h"

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#include "ap_mpm.h"

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#include "unixd.h"

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#include "mpm_common.h"

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#include "ap_listen.h"

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#include "ap_mmn.h"

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#include "apr_poll.h"

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#ifdef HAVE_BSTRING_H

bed3c2e56e8f3328e780200466b9d009093db468sf#include <bstring.h> /* for IRIX, FD_SET calls bzero() */

bed3c2e56e8f3328e780200466b9d009093db468sf#endif

bed3c2e56e8f3328e780200466b9d009093db468sf#ifdef HAVE_TIME_H

bed3c2e56e8f3328e780200466b9d009093db468sf#include <time.h>

bed3c2e56e8f3328e780200466b9d009093db468sf#endif

bed3c2e56e8f3328e780200466b9d009093db468sf#ifdef HAVE_SYS_PROCESSOR_H

bed3c2e56e8f3328e780200466b9d009093db468sf#include <sys/processor.h> /* for bindprocessor() */

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#endif

60a4b2c422dcbb08a554fb193105c08da592718bpoirier

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#include <signal.h>

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#include <sys/times.h>

60a4b2c422dcbb08a554fb193105c08da592718bpoirier

bcb2c4ef861e8f8260284631b6753e1088643c8asf#ifndef DEFAULT_SERVER_LIMIT

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#define DEFAULT_SERVER_LIMIT 256

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#endif

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#ifndef MAX_SERVER_LIMIT

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#define MAX_SERVER_LIMIT 20000

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#endif

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#ifndef HARD_THREAD_LIMIT

d474d8ef01ec5c2a09341cd148851ed383c3287crbowen#define HARD_THREAD_LIMIT 1

d474d8ef01ec5c2a09341cd148851ed383c3287crbowen#endif

d474d8ef01ec5c2a09341cd148851ed383c3287crbowen

0236ede61169f34359c234625a1d792b97d7db12nd

0236ede61169f34359c234625a1d792b97d7db12ndint ap_threads_per_child=0; /* Worker threads per child */

0236ede61169f34359c234625a1d792b97d7db12ndstatic apr_proc_mutex_t *accept_mutex;

60a4b2c422dcbb08a554fb193105c08da592718bpoirierstatic int ap_daemons_to_start=0;

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sfstatic int ap_daemons_min_free=0;

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sfstatic int ap_daemons_max_free=0;

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sfstatic int ap_daemons_limit=0; /* MaxClients */

60a4b2c422dcbb08a554fb193105c08da592718bpoirierstatic int server_limit = DEFAULT_SERVER_LIMIT;

60a4b2c422dcbb08a554fb193105c08da592718bpoirierstatic int first_server_limit;

60a4b2c422dcbb08a554fb193105c08da592718bpoirierstatic int changed_limit_at_restart;

60a4b2c422dcbb08a554fb193105c08da592718bpoirier

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sfstatic ap_pod_t *pod;

60a4b2c422dcbb08a554fb193105c08da592718bpoirier

fed47023e9be04c612b5f6d4a5ee2b8e7c587181rbowenint ap_max_daemons_limit = -1;

fed47023e9be04c612b5f6d4a5ee2b8e7c587181rbowenserver_rec *ap_server_conf;

60a4b2c422dcbb08a554fb193105c08da592718bpoirier

60a4b2c422dcbb08a554fb193105c08da592718bpoirier

60a4b2c422dcbb08a554fb193105c08da592718bpoirierstatic int one_process = 0;

60a4b2c422dcbb08a554fb193105c08da592718bpoirier

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sfstatic apr_pool_t *pconf; /* Pool for config stuff */

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sfstatic apr_pool_t *pchild; /* Pool for httpd child stuff */

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf

60a4b2c422dcbb08a554fb193105c08da592718bpoirierstatic pid_t ap_my_pid; /* it seems silly to call getpid all the time */

60a4b2c422dcbb08a554fb193105c08da592718bpoirierstatic pid_t parent_pid;

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#ifndef MULTITHREAD

60a4b2c422dcbb08a554fb193105c08da592718bpoirierstatic int my_child_num;

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#endif

60a4b2c422dcbb08a554fb193105c08da592718bpoirierap_generation_t volatile ap_my_generation=0;

60a4b2c422dcbb08a554fb193105c08da592718bpoirier

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#ifdef TPF

60a4b2c422dcbb08a554fb193105c08da592718bpoirierint tpf_child = 0;

60a4b2c422dcbb08a554fb193105c08da592718bpoirierchar tpf_server_name[INETD_SERVNAME_LENGTH+1];

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#endif /* TPF */

60a4b2c422dcbb08a554fb193105c08da592718bpoirier

60a4b2c422dcbb08a554fb193105c08da592718bpoirierstatic int die_now = 0;

60a4b2c422dcbb08a554fb193105c08da592718bpoirier

60a4b2c422dcbb08a554fb193105c08da592718bpoirier#ifdef GPROF

60a4b2c422dcbb08a554fb193105c08da592718bpoirierstatic void chdir_for_gprof(void)

60a4b2c422dcbb08a554fb193105c08da592718bpoirier{

60a4b2c422dcbb08a554fb193105c08da592718bpoirier core_server_config *sconf =

60a4b2c422dcbb08a554fb193105c08da592718bpoirier ap_get_module_config(ap_server_conf->module_config, &core_module);

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf char *dir = sconf->gprof_dir;

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf const char *use_dir;

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf

60a4b2c422dcbb08a554fb193105c08da592718bpoirier if(dir) {

60a4b2c422dcbb08a554fb193105c08da592718bpoirier apr_status_t res;

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf char buf[512];

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf int len = strlen(sconf->gprof_dir) - 1;

b6529ec5115d80b7dedcfd0935746015b2096084minfrin if(*(dir + len) == '%') {

b6529ec5115d80b7dedcfd0935746015b2096084minfrin dir[len] = '\0';

b6529ec5115d80b7dedcfd0935746015b2096084minfrin apr_snprintf(buf, sizeof(buf), "%sgprof.%d", dir, (int)getpid());

b6529ec5115d80b7dedcfd0935746015b2096084minfrin }

b6529ec5115d80b7dedcfd0935746015b2096084minfrin use_dir = ap_server_root_relative(pconf, buf[0] ? buf : dir);

b6529ec5115d80b7dedcfd0935746015b2096084minfrin res = apr_dir_make(use_dir, 0755, pconf);

b6529ec5115d80b7dedcfd0935746015b2096084minfrin if(res != APR_SUCCESS && !APR_STATUS_IS_EEXIST(res)) {

b6529ec5115d80b7dedcfd0935746015b2096084minfrin ap_log_error(APLOG_MARK, APLOG_ERR, errno, ap_server_conf,

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf "gprof: error creating directory %s", dir);

60a4b2c422dcbb08a554fb193105c08da592718bpoirier }

60a4b2c422dcbb08a554fb193105c08da592718bpoirier }

60a4b2c422dcbb08a554fb193105c08da592718bpoirier else {

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf use_dir = ap_server_root_relative(pconf, DEFAULT_REL_RUNTIMEDIR);

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf }

78f97ce162b66a0dbfd7af4dcd9984f162569b04minfrin

b6529ec5115d80b7dedcfd0935746015b2096084minfrin chdir(use_dir);

b6529ec5115d80b7dedcfd0935746015b2096084minfrin}

b6529ec5115d80b7dedcfd0935746015b2096084minfrin#else

b6529ec5115d80b7dedcfd0935746015b2096084minfrin#define chdir_for_gprof()

b6529ec5115d80b7dedcfd0935746015b2096084minfrin#endif

b6529ec5115d80b7dedcfd0935746015b2096084minfrin

78f97ce162b66a0dbfd7af4dcd9984f162569b04minfrin#define ap_check_signals()

78f97ce162b66a0dbfd7af4dcd9984f162569b04minfrin

78f97ce162b66a0dbfd7af4dcd9984f162569b04minfrinstatic void clean_child_exit(int code) __attribute__ ((noreturn));

78f97ce162b66a0dbfd7af4dcd9984f162569b04minfrinstatic void clean_child_exit(int code)

78f97ce162b66a0dbfd7af4dcd9984f162569b04minfrin{

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf if (pchild) {

60a4b2c422dcbb08a554fb193105c08da592718bpoirier apr_pool_destroy(pchild);

60a4b2c422dcbb08a554fb193105c08da592718bpoirier }

60a4b2c422dcbb08a554fb193105c08da592718bpoirier ap_mpm_pod_close(pod);

60a4b2c422dcbb08a554fb193105c08da592718bpoirier chdir_for_gprof();

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf exit(code);

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf}

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf

60a4b2c422dcbb08a554fb193105c08da592718bpoirierstatic void accept_mutex_on(void)

60a4b2c422dcbb08a554fb193105c08da592718bpoirier{

60a4b2c422dcbb08a554fb193105c08da592718bpoirier apr_status_t rv = apr_proc_mutex_lock(accept_mutex);

60a4b2c422dcbb08a554fb193105c08da592718bpoirier if (rv != APR_SUCCESS) {

60a4b2c422dcbb08a554fb193105c08da592718bpoirier const char *msg = "couldn't grab the accept mutex";

7171511e7e2c17e9b54cc34dc247266b70138d6crbowen

7171511e7e2c17e9b54cc34dc247266b70138d6crbowen if (ap_my_generation !=

7171511e7e2c17e9b54cc34dc247266b70138d6crbowen ap_scoreboard_image->global->running_generation) {

60a4b2c422dcbb08a554fb193105c08da592718bpoirier ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, NULL, msg);

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf clean_child_exit(0);

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf }

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf else {

60a4b2c422dcbb08a554fb193105c08da592718bpoirier ap_log_error(APLOG_MARK, APLOG_EMERG, rv, NULL, msg);

60a4b2c422dcbb08a554fb193105c08da592718bpoirier exit(APEXIT_CHILDFATAL);

60a4b2c422dcbb08a554fb193105c08da592718bpoirier }

60a4b2c422dcbb08a554fb193105c08da592718bpoirier }

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf}

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sfstatic void accept_mutex_off(void)

60a4b2c422dcbb08a554fb193105c08da592718bpoirier{

60a4b2c422dcbb08a554fb193105c08da592718bpoirier apr_status_t rv = apr_proc_mutex_unlock(accept_mutex);

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf if (rv != APR_SUCCESS) {

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf const char *msg = "couldn't release the accept mutex";

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf

60a4b2c422dcbb08a554fb193105c08da592718bpoirier if (ap_my_generation !=

60a4b2c422dcbb08a554fb193105c08da592718bpoirier ap_scoreboard_image->global->running_generation) {

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, NULL, msg);

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf /* don't exit here... we have a connection to

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf }

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf else {

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf ap_log_error(APLOG_MARK, APLOG_EMERG, rv, NULL, msg);

60a4b2c422dcbb08a554fb193105c08da592718bpoirier exit(APEXIT_CHILDFATAL);

60a4b2c422dcbb08a554fb193105c08da592718bpoirier }

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf }

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf}

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#ifdef SINGLE_LISTEN_UNSERIALIZED_ACCEPT

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#define SAFE_ACCEPT(stmt) do {if (ap_listeners->next) {stmt;}} while(0)

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#else

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#define SAFE_ACCEPT(stmt) do {stmt;} while(0)

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf#endif

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sfAP_DECLARE(apr_status_t) ap_mpm_query(int query_code, int *result)

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf{

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf switch(query_code){

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf case AP_MPMQ_MAX_DAEMON_USED:

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf *result = ap_daemons_limit;

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf return APR_SUCCESS;

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf case AP_MPMQ_IS_THREADED:

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf *result = AP_MPMQ_NOT_SUPPORTED;

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf return APR_SUCCESS;

50c04f297d76a57ead2fa6b73845f7563b1fc788sf case AP_MPMQ_IS_FORKED:

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf *result = AP_MPMQ_DYNAMIC;

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf return APR_SUCCESS;

8cef90cad1b259d4a94f6095aa30439c60549a5drbowen case AP_MPMQ_HARD_LIMIT_DAEMONS:

8cef90cad1b259d4a94f6095aa30439c60549a5drbowen *result = server_limit;

8cef90cad1b259d4a94f6095aa30439c60549a5drbowen return APR_SUCCESS;

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf case AP_MPMQ_HARD_LIMIT_THREADS:

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf *result = HARD_THREAD_LIMIT;

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick return APR_SUCCESS;

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick case AP_MPMQ_MAX_THREADS:

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick *result = 0;

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick return APR_SUCCESS;

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick case AP_MPMQ_MIN_SPARE_DAEMONS:

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick *result = ap_daemons_min_free;

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick return APR_SUCCESS;

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick case AP_MPMQ_MIN_SPARE_THREADS:

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick *result = 0;

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick return APR_SUCCESS;

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick case AP_MPMQ_MAX_SPARE_DAEMONS:

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick *result = ap_daemons_max_free;

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick return APR_SUCCESS;

9a58dc6a2b26ec128b1270cf48810e705f1a90dbsf case AP_MPMQ_MAX_SPARE_THREADS:

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick *result = 0;

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick return APR_SUCCESS;

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick case AP_MPMQ_MAX_REQUESTS_DAEMON:

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick *result = ap_max_requests_per_child;

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick return APR_SUCCESS;

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick case AP_MPMQ_MAX_DAEMONS:

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick *result = server_limit;

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick return APR_SUCCESS;

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick }

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick return APR_ENOTIMPL;

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick}

33e4ab6c78a779cb3f72f7afed0fef9068f1b822trawick

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#if defined(NEED_WAITPID)

68e7d4f7d80c3e5ed94185cb28100bc786e4304atrawickint reap_children(int *exitcode, apr_exit_why_e *status)

68e7d4f7d80c3e5ed94185cb28100bc786e4304atrawick{

68e7d4f7d80c3e5ed94185cb28100bc786e4304atrawick int n, pid;

68e7d4f7d80c3e5ed94185cb28100bc786e4304atrawick

68e7d4f7d80c3e5ed94185cb28100bc786e4304atrawick for (n = 0; n < ap_max_daemons_limit; ++n) {

68e7d4f7d80c3e5ed94185cb28100bc786e4304atrawick if (ap_scoreboard_image->servers[n][0].status != SERVER_DEAD &&

9a58dc6a2b26ec128b1270cf48810e705f1a90dbsf kill((pid = ap_scoreboard_image->parent[n].pid), 0) == -1) {

68e7d4f7d80c3e5ed94185cb28100bc786e4304atrawick ap_update_child_status_from_indexes(n, 0, SERVER_DEAD, NULL);

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick /* just mark it as having a successful exit status */

2509f1cd3be884abbe4852e15b8da00bebaad5b1poirier *status = APR_PROC_EXIT;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick *exitcode = 0;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick return(pid);

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick }

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick }

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick return 0;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick}

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#endif

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick

2509f1cd3be884abbe4852e15b8da00bebaad5b1poirierstatic void just_die(int sig)

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick{

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick clean_child_exit(0);

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick}

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawickstatic int volatile shutdown_pending;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawickstatic int volatile restart_pending;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawickstatic int volatile is_graceful;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawickstatic void sig_term(int sig)

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick{

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick if (shutdown_pending == 1) {

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick /* Um, is this _probably_ not an error, if the user has

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick return;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick }

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick shutdown_pending = 1;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick}

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawickstatic void restart(int sig)

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick{

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick if (restart_pending == 1) {

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick /* Probably not an error - don't bother reporting it */

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick return;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick }

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick restart_pending = 1;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick is_graceful = (sig == AP_SIG_GRACEFUL);

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick}

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawickstatic void set_signals(void)

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick{

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#ifndef NO_USE_SIGACTION

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick struct sigaction sa;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#endif

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick if (!one_process) {

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick ap_fatal_signal_setup(ap_server_conf, pconf);

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick }

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#ifndef NO_USE_SIGACTION

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick sigemptyset(&sa.sa_mask);

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick sa.sa_flags = 0;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick sa.sa_handler = sig_term;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick if (sigaction(SIGTERM, &sa, NULL) < 0)

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGTERM)");

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#ifdef SIGINT

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick if (sigaction(SIGINT, &sa, NULL) < 0)

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGINT)");

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#endif

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#ifdef SIGXCPU

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick sa.sa_handler = SIG_DFL;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick if (sigaction(SIGXCPU, &sa, NULL) < 0)

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGXCPU)");

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#endif

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#ifdef SIGXFSZ

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick sa.sa_handler = SIG_DFL;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick if (sigaction(SIGXFSZ, &sa, NULL) < 0)

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGXFSZ)");

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#endif

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#ifdef SIGPIPE

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick sa.sa_handler = SIG_IGN;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick if (sigaction(SIGPIPE, &sa, NULL) < 0)

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGPIPE)");

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#endif

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick /* we want to ignore HUPs and AP_SIG_GRACEFUL while we're busy

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick sigaddset(&sa.sa_mask, SIGHUP);

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick sigaddset(&sa.sa_mask, AP_SIG_GRACEFUL);

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick sa.sa_handler = restart;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick if (sigaction(SIGHUP, &sa, NULL) < 0)

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGHUP)");

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick if (sigaction(AP_SIG_GRACEFUL, &sa, NULL) < 0)

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(" AP_SIG_GRACEFUL_STRING ")");

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#else

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick if (!one_process) {

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#ifdef SIGXCPU

8cef90cad1b259d4a94f6095aa30439c60549a5drbowen apr_signal(SIGXCPU, SIG_DFL);

8cef90cad1b259d4a94f6095aa30439c60549a5drbowen#endif /* SIGXCPU */

8cef90cad1b259d4a94f6095aa30439c60549a5drbowen#ifdef SIGXFSZ

8cef90cad1b259d4a94f6095aa30439c60549a5drbowen apr_signal(SIGXFSZ, SIG_DFL);

8cef90cad1b259d4a94f6095aa30439c60549a5drbowen#endif /* SIGXFSZ */

8cef90cad1b259d4a94f6095aa30439c60549a5drbowen }

8cef90cad1b259d4a94f6095aa30439c60549a5drbowen

8cef90cad1b259d4a94f6095aa30439c60549a5drbowen apr_signal(SIGTERM, sig_term);

8cef90cad1b259d4a94f6095aa30439c60549a5drbowen#ifdef SIGHUP

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick apr_signal(SIGHUP, restart);

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#endif /* SIGHUP */

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#ifdef AP_SIG_GRACEFUL

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick apr_signal(AP_SIG_GRACEFUL, restart);

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#endif /* AP_SIG_GRACEFUL */

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#ifdef SIGPIPE

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick apr_signal(SIGPIPE, SIG_IGN);

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#endif /* SIGPIPE */

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick#endif

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick}

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawickstatic int requests_this_child;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawickstatic int num_listensocks = 0;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawickstatic ap_listen_rec *listensocks;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawickint ap_graceful_stop_signalled(void)

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick{

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick /* not ever called anymore... */

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick return 0;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick}

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick

2509f1cd3be884abbe4852e15b8da00bebaad5b1poirier

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawickstatic void child_main(int child_num_arg)

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick{

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick apr_pool_t *ptrans;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick apr_allocator_t *allocator;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick conn_rec *current_conn;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick apr_status_t status = APR_EINIT;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick int i;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick ap_listen_rec *lr;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick int curr_pollfd, last_pollfd = 0;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick apr_pollfd_t *pollset;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick int offset;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick void *csd;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick ap_sb_handle_t *sbh;

2d5f033e0b60accdc5c92470a71c6e9cd6c90803trawick apr_status_t rv;

2509f1cd3be884abbe4852e15b8da00bebaad5b1poirier apr_bucket_alloc_t *bucket_alloc;

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf my_child_num = child_num_arg;

5cd08ee4a8f5a665e656f70048a1268a02bc0e73sf ap_my_pid = getpid();

60a4b2c422dcbb08a554fb193105c08da592718bpoirier csd = NULL;

60a4b2c422dcbb08a554fb193105c08da592718bpoirier requests_this_child = 0;

60a4b2c422dcbb08a554fb193105c08da592718bpoirier

9c1260efa52c82c2a58e5b5f20cd6902563d95f5rbowen ap_fatal_signal_child_setup(ap_server_conf);

60a4b2c422dcbb08a554fb193105c08da592718bpoirier

60a4b2c422dcbb08a554fb193105c08da592718bpoirier /* Get a sub context for global allocations in this child, so that

apr_allocator_create(&allocator);

apr_allocator_max_free_set(allocator, ap_max_mem_free);

apr_pool_create_ex(&pchild, pconf, NULL, allocator);

apr_allocator_owner_set(allocator, pchild);

apr_pool_create(&ptrans, pchild);

apr_pool_tag(ptrans, "transaction");

/* needs to be done before we switch UIDs so we have permissions */

ap_reopen_scoreboard(pchild, NULL, 0);

rv = apr_proc_mutex_child_init(&accept_mutex, ap_lock_fname, pchild);

if (rv != APR_SUCCESS) {

ap_log_error(APLOG_MARK, APLOG_EMERG, rv, ap_server_conf,

"Couldn't initialize cross-process lock in child");

clean_child_exit(APEXIT_CHILDFATAL);

}

if (unixd_setup_child()) {

clean_child_exit(APEXIT_CHILDFATAL);

}

ap_run_child_init(pchild, ap_server_conf);

ap_create_sb_handle(&sbh, pchild, my_child_num, 0);

(void) ap_update_child_status(sbh, SERVER_READY, (request_rec *) NULL);

/* Set up the pollfd array */

listensocks = apr_pcalloc(pchild,

sizeof(*listensocks) * (num_listensocks));

for (lr = ap_listeners, i = 0; i < num_listensocks; lr = lr->next, i++) {

listensocks[i].accept_func = lr->accept_func;

listensocks[i].sd = lr->sd;

}

pollset = apr_palloc(pchild, sizeof(*pollset) * num_listensocks);

pollset[0].p = pchild;

for (i = 0; i < num_listensocks; i++) {

pollset[i].desc.s = listensocks[i].sd;

pollset[i].desc_type = APR_POLL_SOCKET;

pollset[i].reqevents = APR_POLLIN;

}

bucket_alloc = apr_bucket_alloc_create(pchild);

while (!die_now) {

/*

current_conn = NULL;

apr_pool_clear(ptrans);

if ((ap_max_requests_per_child > 0

&& requests_this_child++ >= ap_max_requests_per_child)) {

clean_child_exit(0);

}

(void) ap_update_child_status(sbh, SERVER_READY, (request_rec *) NULL);

/*

/* Lock around "accept", if necessary */

SAFE_ACCEPT(accept_mutex_on());

if (num_listensocks == 1) {

offset = 0;

}

else {

/* multiple listening sockets - need to poll */

for (;;) {

apr_status_t ret;

apr_int32_t n;

ret = apr_poll(pollset, num_listensocks, &n, -1);

if (ret != APR_SUCCESS) {

if (APR_STATUS_IS_EINTR(ret)) {

if (one_process && shutdown_pending) {

return;

}

continue;

}

/* Single Unix documents select as returning errnos

ap_log_error(APLOG_MARK, APLOG_ERR, ret, ap_server_conf,

"apr_poll: (listen)");

clean_child_exit(1);

}

/* find a listener */

curr_pollfd = last_pollfd;

do {

curr_pollfd++;

if (curr_pollfd >= num_listensocks) {

curr_pollfd = 0;

}

/* XXX: Should we check for POLLERR? */

if (pollset[curr_pollfd].rtnevents & APR_POLLIN) {

last_pollfd = curr_pollfd;

offset = curr_pollfd;

goto got_fd;

}

} while (curr_pollfd != last_pollfd);

continue;

}

}

got_fd:

/* if we accept() something we don't want to die, so we have to

for (;;) {

status = listensocks[offset].accept_func(&csd,

&listensocks[offset], ptrans);

if (status == APR_SUCCESS) {

break;

}

if (status == APR_EGENERAL) {

/* resource shortage or should-not-occur occured */

clean_child_exit(1);

}

if (APR_STATUS_IS_EINTR(status) && one_process && shutdown_pending) {

return;

}

}

SAFE_ACCEPT(accept_mutex_off()); /* unlock after "accept" */

/*

current_conn = ap_run_create_connection(ptrans, ap_server_conf, csd, my_child_num, sbh, bucket_alloc);

if (current_conn) {

ap_process_connection(current_conn, csd);

ap_lingering_close(current_conn);

}

/* Check the pod and the generation number after processing a

if (ap_mpm_pod_check(pod) == APR_SUCCESS) { /* selected as idle? */

die_now = 1;

}

else if (ap_my_generation !=

ap_scoreboard_image->global->running_generation) { /* restart? */

/* yeah, this could be non-graceful restart, in which case the

die_now = 1;

}

}

clean_child_exit(0);

}

static int make_child(server_rec *s, int slot)

{

int pid;

if (slot + 1 > ap_max_daemons_limit) {

ap_max_daemons_limit = slot + 1;

}

if (one_process) {

apr_signal(SIGHUP, sig_term);

/* Don't catch AP_SIG_GRACEFUL in ONE_PROCESS mode :) */

apr_signal(SIGINT, sig_term);

#ifdef SIGQUIT

apr_signal(SIGQUIT, SIG_DFL);

#endif

apr_signal(SIGTERM, sig_term);

child_main(slot);

return 0;

}

(void) ap_update_child_status_from_indexes(slot, 0, SERVER_STARTING,

(request_rec *) NULL);

#ifdef _OSD_POSIX

/* BS2000 requires a "special" version of fork() before a setuid() call */

if ((pid = os_fork(unixd_config.user_name)) == -1) {

#elif defined(TPF)

if ((pid = os_fork(s, slot)) == -1) {

#else

if ((pid = fork()) == -1) {

#endif

ap_log_error(APLOG_MARK, APLOG_ERR, errno, s, "fork: Unable to fork new process");

/* fork didn't succeed. Fix the scoreboard or else

(void) ap_update_child_status_from_indexes(slot, 0, SERVER_DEAD,

(request_rec *) NULL);

/* In case system resources are maxxed out, we don't want

sleep(10);

return -1;

}

if (!pid) {

#ifdef HAVE_BINDPROCESSOR

/* by default AIX binds to a single processor

int status = bindprocessor(BINDPROCESS, (int)getpid(),

PROCESSOR_CLASS_ANY);

if (status != OK) {

ap_log_error(APLOG_MARK, APLOG_WARNING, errno,

ap_server_conf, "processor unbind failed %d", status);

}

#endif

RAISE_SIGSTOP(MAKE_CHILD);

AP_MONCONTROL(1);

/* Disable the parent's signal handlers and set up proper handling in

apr_signal(SIGHUP, just_die);

apr_signal(SIGTERM, just_die);

/* The child process doesn't do anything for AP_SIG_GRACEFUL.

apr_signal(AP_SIG_GRACEFUL, SIG_IGN);

child_main(slot);

}

ap_scoreboard_image->parent[slot].pid = pid;

return 0;

}

static void startup_children(int number_to_start)

{

int i;

for (i = 0; number_to_start && i < ap_daemons_limit; ++i) {

if (ap_scoreboard_image->servers[i][0].status != SERVER_DEAD) {

continue;

}

if (make_child(ap_server_conf, i) < 0) {

break;

}

--number_to_start;

}

}

static int idle_spawn_rate = 1;

#ifndef MAX_SPAWN_RATE

#define MAX_SPAWN_RATE (32)

#endif

static int hold_off_on_exponential_spawning;

static void perform_idle_server_maintenance(apr_pool_t *p)

{

int i;

int to_kill;

int idle_count;

worker_score *ws;

int free_length;

int free_slots[MAX_SPAWN_RATE];

int last_non_dead;

int total_non_dead;

/* initialize the free_list */

free_length = 0;

to_kill = -1;

idle_count = 0;

last_non_dead = -1;

total_non_dead = 0;

for (i = 0; i < ap_daemons_limit; ++i) {

int status;

if (i >= ap_max_daemons_limit && free_length == idle_spawn_rate)

break;

ws = &ap_scoreboard_image->servers[i][0];

status = ws->status;

if (status == SERVER_DEAD) {

/* try to keep children numbers as low as possible */

if (free_length < idle_spawn_rate) {

free_slots[free_length] = i;

++free_length;

}

}

else {

/* We consider a starting server as idle because we started it

if (status <= SERVER_READY) {

++ idle_count;

/* always kill the highest numbered child if we have to...

to_kill = i;

}

++total_non_dead;

last_non_dead = i;

}

}

ap_max_daemons_limit = last_non_dead + 1;

if (idle_count > ap_daemons_max_free) {

/* kill off one child... we use the pod because that'll cause it to

ap_mpm_pod_signal(pod);

idle_spawn_rate = 1;

}

else if (idle_count < ap_daemons_min_free) {

/* terminate the free list */

if (free_length == 0) {

/* only report this condition once */

static int reported = 0;

if (!reported) {

ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf,

"server reached MaxClients setting, consider"

" raising the MaxClients setting");

reported = 1;

}

idle_spawn_rate = 1;

}

else {

if (idle_spawn_rate >= 8) {

ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf,

"server seems busy, (you may need "

"to increase StartServers, or Min/MaxSpareServers), "

"spawning %d children, there are %d idle, and "

"%d total children", idle_spawn_rate,

idle_count, total_non_dead);

}

for (i = 0; i < free_length; ++i) {

#ifdef TPF

if (make_child(ap_server_conf, free_slots[i]) == -1) {

if(free_length == 1) {

shutdown_pending = 1;

ap_log_error(APLOG_MARK, APLOG_EMERG, 0, ap_server_conf,

"No active child processes: shutting down");

}

}

#else

make_child(ap_server_conf, free_slots[i]);

#endif /* TPF */

}

/* the next time around we want to spawn twice as many if this

if (hold_off_on_exponential_spawning) {

--hold_off_on_exponential_spawning;

}

else if (idle_spawn_rate < MAX_SPAWN_RATE) {

idle_spawn_rate *= 2;

}

}

}

else {

idle_spawn_rate = 1;

}

}

int ap_mpm_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s)

{

int index;

int remaining_children_to_start;

apr_status_t rv;

ap_log_pid(pconf, ap_pid_fname);

first_server_limit = server_limit;

if (changed_limit_at_restart) {

ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s,

"WARNING: Attempt to change ServerLimit "

"ignored during restart");

changed_limit_at_restart = 0;

}

/* Initialize cross-process accept lock */

ap_lock_fname = apr_psprintf(_pconf, "%s.%" APR_PID_T_FMT,

ap_server_root_relative(_pconf, ap_lock_fname),

ap_my_pid);

rv = apr_proc_mutex_create(&accept_mutex, ap_lock_fname,

ap_accept_lock_mech, _pconf);

if (rv != APR_SUCCESS) {

ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,

"Couldn't create accept lock");

return 1;

}

#if APR_USE_SYSVSEM_SERIALIZE

if (ap_accept_lock_mech == APR_LOCK_DEFAULT ||

ap_accept_lock_mech == APR_LOCK_SYSVSEM) {

#else

if (ap_accept_lock_mech == APR_LOCK_SYSVSEM) {

#endif

rv = unixd_set_proc_mutex_perms(accept_mutex);

if (rv != APR_SUCCESS) {

ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,

"Couldn't set permissions on cross-process lock; "

"check User and Group directives");

return 1;

}

}

if (!is_graceful) {

if (ap_run_pre_mpm(s->process->pool, SB_SHARED) != OK) {

return 1;

}

/* fix the generation number in the global score; we just got a new,

ap_scoreboard_image->global->running_generation = ap_my_generation;

}

set_signals();

if (one_process) {

AP_MONCONTROL(1);

make_child(ap_server_conf, 0);

}

else {

if (ap_daemons_max_free < ap_daemons_min_free + 1) /* Don't thrash... */

ap_daemons_max_free = ap_daemons_min_free + 1;

/* If we're doing a graceful_restart then we're going to see a lot

remaining_children_to_start = ap_daemons_to_start;

if (remaining_children_to_start > ap_daemons_limit) {

remaining_children_to_start = ap_daemons_limit;

}

if (!is_graceful) {

startup_children(remaining_children_to_start);

remaining_children_to_start = 0;

}

else {

/* give the system some time to recover before kicking into

hold_off_on_exponential_spawning = 10;

}

ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf,

"%s configured -- resuming normal operations",

ap_get_server_version());

ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf,

"Server built: %s", ap_get_server_built());

#ifdef AP_MPM_WANT_SET_ACCEPT_LOCK_MECH

ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf,

"AcceptMutex: %s (default: %s)",

apr_proc_mutex_name(accept_mutex),

apr_proc_mutex_defname());

#endif

restart_pending = shutdown_pending = 0;

while (!restart_pending && !shutdown_pending) {

int child_slot;

apr_exit_why_e exitwhy;

int status, processed_status;

/* this is a memory leak, but I'll fix it later. */

apr_proc_t pid;

ap_wait_or_timeout(&exitwhy, &status, &pid, pconf);

/* XXX: if it takes longer than 1 second for all our children

if (pid.pid != -1) {

processed_status = ap_process_child_status(&pid, exitwhy, status);

if (processed_status == APEXIT_CHILDFATAL) {

return 1;

}

/* non-fatal death... note that it's gone in the scoreboard. */

child_slot = find_child_by_pid(&pid);

if (child_slot >= 0) {

(void) ap_update_child_status_from_indexes(child_slot, 0, SERVER_DEAD,

(request_rec *) NULL);

if (processed_status == APEXIT_CHILDSICK) {

/* child detected a resource shortage (E[NM]FILE, ENOBUFS, etc)

idle_spawn_rate = 1;

}

else if (remaining_children_to_start

&& child_slot < ap_daemons_limit) {

/* we're still doing a 1-for-1 replacement of dead

make_child(ap_server_conf, child_slot);

--remaining_children_to_start;

}

#if APR_HAS_OTHER_CHILD

}

else if (apr_proc_other_child_read(&pid, status) == 0) {

/* handled */

#endif

}

else if (is_graceful) {

/* Great, we've probably just lost a slot in the

ap_log_error(APLOG_MARK, APLOG_WARNING,

0, ap_server_conf,

"long lost child came home! (pid %ld)", (long)pid.pid);

}

/* Don't perform idle maintenance when a child dies,

continue;

}

else if (remaining_children_to_start) {

/* we hit a 1 second timeout in which none of the previous

startup_children(remaining_children_to_start);

remaining_children_to_start = 0;

/* In any event we really shouldn't do the code below because

continue;

}

perform_idle_server_maintenance(pconf);

#ifdef TPF

shutdown_pending = os_check_server(tpf_server_name);

ap_check_signals();

sleep(1);

#endif /*TPF */

}

} /* one_process */

if (shutdown_pending) {

/* Time to gracefully shut down:

if (unixd_killpg(getpgrp(), SIGTERM) < 0) {

ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "killpg SIGTERM");

}

ap_reclaim_child_processes(1); /* Start with SIGTERM */

/* cleanup pid file on normal shutdown */

{

const char *pidfile = NULL;

pidfile = ap_server_root_relative (pconf, ap_pid_fname);

if ( pidfile != NULL && unlink(pidfile) == 0)

ap_log_error(APLOG_MARK, APLOG_INFO,

0, ap_server_conf,

"removed PID file %s (pid=%ld)",

pidfile, (long)getpid());

}

ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf,

"caught SIGTERM, shutting down");

return 1;

}

/* we've been told to restart */

apr_signal(SIGHUP, SIG_IGN);

if (one_process) {

/* not worth thinking about */

return 1;

}

/* advance to the next generation */

/* XXX: we really need to make sure this new generation number isn't in

++ap_my_generation;

ap_scoreboard_image->global->running_generation = ap_my_generation;

if (is_graceful) {

ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf,

"Graceful restart requested, doing restart");

/* kill off the idle ones */

ap_mpm_pod_killpg(pod, ap_daemons_limit);

/* This is mostly for debugging... so that we know what is still

for (index = 0; index < ap_daemons_limit; ++index) {

if (ap_scoreboard_image->servers[index][0].status != SERVER_DEAD) {

ap_scoreboard_image->servers[index][0].status = SERVER_GRACEFUL;

}

}

}

else {

/* Kill 'em off */

if (unixd_killpg(getpgrp(), SIGHUP) < 0) {

ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "killpg SIGHUP");

}

ap_reclaim_child_processes(0); /* Not when just starting up */

ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf,

"SIGHUP received. Attempting to restart");

}

return 0;

}

static int prefork_open_logs(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)

{

apr_status_t rv;

pconf = p;

ap_server_conf = s;

if ((num_listensocks = ap_setup_listeners(ap_server_conf)) < 1) {

ap_log_error(APLOG_MARK, APLOG_ALERT|APLOG_STARTUP, 0,

NULL, "no listening sockets available, shutting down");

return DONE;

}

if ((rv = ap_mpm_pod_open(pconf, &pod))) {

ap_log_error(APLOG_MARK, APLOG_CRIT|APLOG_STARTUP, rv, NULL,

"Could not open pipe-of-death.");

return DONE;

}

return OK;

}

static int prefork_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp)

{

static int restart_num = 0;

int no_detach, debug, foreground;

apr_status_t rv;

debug = ap_exists_config_define("DEBUG");

if (debug) {

foreground = one_process = 1;

no_detach = 0;

}

else

{

no_detach = ap_exists_config_define("NO_DETACH");

one_process = ap_exists_config_define("ONE_PROCESS");

foreground = ap_exists_config_define("FOREGROUND");

}

/* sigh, want this only the second time around */

if (restart_num++ == 1) {

is_graceful = 0;

if (!one_process && !foreground) {

rv = apr_proc_detach(no_detach ? APR_PROC_DETACH_FOREGROUND

: APR_PROC_DETACH_DAEMONIZE);

if (rv != APR_SUCCESS) {

ap_log_error(APLOG_MARK, APLOG_CRIT, rv, NULL,

"apr_proc_detach failed");

return HTTP_INTERNAL_SERVER_ERROR;

}

}

parent_pid = ap_my_pid = getpid();

}

unixd_pre_config(ptemp);

ap_listen_pre_config();

ap_daemons_to_start = DEFAULT_START_DAEMON;

ap_daemons_min_free = DEFAULT_MIN_FREE_DAEMON;

ap_daemons_max_free = DEFAULT_MAX_FREE_DAEMON;

ap_daemons_limit = server_limit;

ap_pid_fname = DEFAULT_PIDLOG;

ap_lock_fname = DEFAULT_LOCKFILE;

ap_max_requests_per_child = DEFAULT_MAX_REQUESTS_PER_CHILD;

ap_extended_status = 0;

apr_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir));

return OK;

}

static void prefork_hooks(apr_pool_t *p)

{

/* The prefork open_logs phase must run before the core's, or stderr

static const char *const aszSucc[] = {"core.c", NULL};

#ifdef AUX3

(void) set42sig();

#endif

ap_hook_open_logs(prefork_open_logs, NULL, aszSucc, APR_HOOK_MIDDLE);

ap_hook_pre_config(prefork_pre_config, NULL, NULL, APR_HOOK_MIDDLE);

}

static const char *set_daemons_to_start(cmd_parms *cmd, void *dummy, const char *arg)

{

const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);

if (err != NULL) {

return err;

}

ap_daemons_to_start = atoi(arg);

return NULL;

}

static const char *set_min_free_servers(cmd_parms *cmd, void *dummy, const char *arg)

{

const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);

if (err != NULL) {

return err;

}

ap_daemons_min_free = atoi(arg);

if (ap_daemons_min_free <= 0) {

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"WARNING: detected MinSpareServers set to non-positive.");

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"Resetting to 1 to avoid almost certain Apache failure.");

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"Please read the documentation.");

ap_daemons_min_free = 1;

}

return NULL;

}

static const char *set_max_free_servers(cmd_parms *cmd, void *dummy, const char *arg)

{

const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);

if (err != NULL) {

return err;

}

ap_daemons_max_free = atoi(arg);

return NULL;

}

static const char *set_max_clients (cmd_parms *cmd, void *dummy, const char *arg)

{

const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);

if (err != NULL) {

return err;

}

ap_daemons_limit = atoi(arg);

if (ap_daemons_limit > server_limit) {

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"WARNING: MaxClients of %d exceeds ServerLimit value "

"of %d servers,", ap_daemons_limit, server_limit);

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

" lowering MaxClients to %d. To increase, please "

"see the ServerLimit", server_limit);

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

" directive.");

ap_daemons_limit = server_limit;

}

else if (ap_daemons_limit < 1) {

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"WARNING: Require MaxClients > 0, setting to 1");

ap_daemons_limit = 1;

}

return NULL;

}

static const char *set_server_limit (cmd_parms *cmd, void *dummy, const char *arg)

{

int tmp_server_limit;

const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);

if (err != NULL) {

return err;

}

tmp_server_limit = atoi(arg);

/* you cannot change ServerLimit across a restart; ignore

if (first_server_limit &&

tmp_server_limit != server_limit) {

/* how do we log a message? the error log is a bit bucket at this

changed_limit_at_restart = 1;

return NULL;

}

server_limit = tmp_server_limit;

if (server_limit > MAX_SERVER_LIMIT) {

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"WARNING: ServerLimit of %d exceeds compile time limit "

"of %d servers,", server_limit, MAX_SERVER_LIMIT);

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

" lowering ServerLimit to %d.", MAX_SERVER_LIMIT);

server_limit = MAX_SERVER_LIMIT;

}

else if (server_limit < 1) {

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"WARNING: Require ServerLimit > 0, setting to 1");

server_limit = 1;

}

return NULL;

}

static const command_rec prefork_cmds[] = {

UNIX_DAEMON_COMMANDS,

LISTEN_COMMANDS,

AP_INIT_TAKE1("StartServers", set_daemons_to_start, NULL, RSRC_CONF,

"Number of child processes launched at server startup"),

AP_INIT_TAKE1("MinSpareServers", set_min_free_servers, NULL, RSRC_CONF,

"Minimum number of idle children, to handle request spikes"),

AP_INIT_TAKE1("MaxSpareServers", set_max_free_servers, NULL, RSRC_CONF,

"Maximum number of idle children"),

AP_INIT_TAKE1("MaxClients", set_max_clients, NULL, RSRC_CONF,

"Maximum number of children alive at the same time"),

AP_INIT_TAKE1("ServerLimit", set_server_limit, NULL, RSRC_CONF,

"Maximum value of MaxClients for this run of Apache"),

{ NULL }

};

module AP_MODULE_DECLARE_DATA mpm_prefork_module = {

MPM20_MODULE_STUFF,

ap_mpm_rewrite_args, /* hook to run before apache parses args */

NULL, /* create per-directory config structure */

NULL, /* merge per-directory config structures */

NULL, /* create per-server config structure */

NULL, /* merge per-server config structures */

prefork_cmds, /* command apr_table_t */

prefork_hooks, /* register hooks */

};