--- /dev/null
+/* ====================================================================
+ * Copyright (c) 1995-1999 The Apache Group. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the Apache Group
+ * for use in the Apache HTTP server project (http://www.apache.org/)."
+ *
+ * 4. The names "Apache Server" and "Apache Group" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * apache@apache.org.
+ *
+ * 5. Products derived from this software may not be called "Apache"
+ * nor may "Apache" appear in their names without prior written
+ * permission of the Apache Group.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the Apache Group
+ * for use in the Apache HTTP server project (http://www.apache.org/)."
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Group and was originally based
+ * on public domain software written at the National Center for
+ * Supercomputing Applications, University of Illinois, Urbana-Champaign.
+ * For more information on the Apache Group and the Apache HTTP server
+ * project, please see <http://www.apache.org/>.
+ *
+ */
+
+/*
+ * httpd.c: simple http daemon for answering WWW file requests
+ *
+ *
+ * 03-21-93 Rob McCool wrote original code (up to NCSA HTTPd 1.3)
+ *
+ * 03-06-95 blong
+ * changed server number for child-alone processes to 0 and changed name
+ * of processes
+ *
+ * 03-10-95 blong
+ * Added numerous speed hacks proposed by Robert S. Thau (rst@ai.mit.edu)
+ * including set group before fork, and call gettime before to fork
+ * to set up libraries.
+ *
+ * 04-14-95 rst / rh
+ * Brandon's code snarfed from NCSA 1.4, but tinkered to work with the
+ * Apache server, and also to have child processes do accept() directly.
+ *
+ * April-July '95 rst
+ * Extensive rework for Apache.
+ */
+
+
+#define CORE_PRIVATE
+
+#include "httpd.h"
+#include "http_main.h"
+#include "http_log.h"
+#include "http_config.h"
+#include "http_core.h" /* for get_remote_host */
+#include "http_connection.h"
+#include "scoreboard.h"
+#include "ap_mpm.h"
+#include "ap_listen.h"
+#include "iol_socket.h"
+
+#define INCL_DOS
+#include <os2.h>
+#include <stdlib.h>
+
+/* config globals */
+
+static int ap_max_requests_per_child=0;
+static char *ap_pid_fname=NULL;
+static char *ap_server_argv0=NULL;
+static int ap_daemons_to_start=0;
+static int ap_daemons_min_free=0;
+static int ap_daemons_max_free=0;
+static int ap_daemons_limit=0;
+static time_t ap_restart_time=0;
+static int ap_extended_status = 0;
+
+/*
+ * The max child slot ever assigned, preserved across restarts. Necessary
+ * to deal with MaxClients changes across SIGUSR1 restarts. We use this
+ * value to optimize routines that have to scan the entire scoreboard.
+ */
+static int max_daemons_limit = -1;
+
+static char ap_coredump_dir[MAX_STRING_LEN];
+
+/* *Non*-shared http_main globals... */
+
+static server_rec *server_conf;
+static int sd;
+static fd_set listenfds;
+static int listenmaxfd;
+
+/* one_process --- debugging mode variable; can be set from the command line
+ * with the -X flag. If set, this gets you the child_main loop running
+ * in the process which originally started up (no detach, no make_child),
+ * which is a pretty nice debugging environment. (You'll get a SIGHUP
+ * early in standalone_main; just continue through. This is the server
+ * trying to kill off any child processes which it might have lying
+ * around --- Apache doesn't keep track of their pids, it just sends
+ * SIGHUP to the process group, ignoring it in the root process.
+ * Continue through and you'll be fine.).
+ */
+
+static int one_process = 0;
+
+#ifdef HAS_OTHER_CHILD
+/* used to maintain list of children which aren't part of the scoreboard */
+typedef struct other_child_rec other_child_rec;
+struct other_child_rec {
+ other_child_rec *next;
+ int pid;
+ void (*maintenance) (int, void *, ap_wait_t);
+ void *data;
+ int write_fd;
+};
+static other_child_rec *other_children;
+#endif
+
+static pool *pconf; /* Pool for config stuff */
+static pool *pchild; /* Pool for httpd child stuff */
+static int my_pid; /* it seems silly to call getpid all the time */
+static scoreboard *ap_scoreboard_image = NULL;
+static int volatile exit_after_unblock = 0;
+
+struct thread_globals {
+ int srv;
+ int csd;
+ int requests_this_child;
+ fd_set main_fds;
+ ap_generation_t ap_my_generation;
+};
+
+static struct thread_globals **ppthread_globals = NULL;
+
+#define THREAD_GLOBAL(gvar) ((*ppthread_globals)->gvar)
+
+
+void reinit_scoreboard(pool *p)
+{
+ ap_assert(!ap_scoreboard_image);
+ ap_scoreboard_image = (scoreboard *) malloc(SCOREBOARD_SIZE);
+ if (ap_scoreboard_image == NULL) {
+ fprintf(stderr, "Ouch! Out of memory reiniting scoreboard!\n");
+ }
+ memset(ap_scoreboard_image, 0, SCOREBOARD_SIZE);
+}
+
+void cleanup_scoreboard(void)
+{
+ ap_assert(ap_scoreboard_image);
+ free(ap_scoreboard_image);
+ ap_scoreboard_image = NULL;
+}
+
+
+/* a clean exit from a child with proper cleanup */
+static void clean_child_exit(int code) __attribute__ ((noreturn));
+static void clean_child_exit(int code)
+{
+ if (pchild) {
+ ap_destroy_pool(pchild);
+ }
+ exit(code);
+}
+
+
+#if defined(USE_OS2SEM_SERIALIZED_ACCEPT)
+
+static HMTX lock_sem = -1;
+
+static void accept_mutex_cleanup(void *foo)
+{
+ DosReleaseMutexSem(lock_sem);
+ DosCloseMutexSem(lock_sem);
+}
+
+/*
+ * Initialize mutex lock.
+ * Done by each child at it's birth
+ */
+static void accept_mutex_child_init(pool *p)
+{
+ int rc = DosOpenMutexSem(NULL, &lock_sem);
+
+ if (rc != 0) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_EMERG, server_conf,
+ "Child cannot open lock semaphore, rc=%d", rc);
+ clean_child_exit(APEXIT_CHILDINIT);
+ } else {
+ ap_register_cleanup(p, NULL, accept_mutex_cleanup, ap_null_cleanup);
+ }
+}
+
+/*
+ * Initialize mutex lock.
+ * Must be safe to call this on a restart.
+ */
+static void accept_mutex_init(pool *p)
+{
+ int rc = DosCreateMutexSem(NULL, &lock_sem, DC_SEM_SHARED, FALSE);
+fprintf(stderr, "Created mutex\n");
+ if (rc != 0) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_EMERG, server_conf,
+ "Parent cannot create lock semaphore, rc=%d", rc);
+ exit(APEXIT_INIT);
+ }
+
+ ap_register_cleanup(p, NULL, accept_mutex_cleanup, ap_null_cleanup);
+}
+
+static void accept_mutex_on(void)
+{
+ int rc = DosRequestMutexSem(lock_sem, SEM_INDEFINITE_WAIT);
+
+ if (rc != 0) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_EMERG, server_conf,
+ "OS2SEM: Error %d getting accept lock. Exiting!", rc);
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+}
+
+static void accept_mutex_off(void)
+{
+ int rc = DosReleaseMutexSem(lock_sem);
+
+ if (rc != 0) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_EMERG, server_conf,
+ "OS2SEM: Error %d freeing accept lock. Exiting!", rc);
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+}
+
+#endif
+
+
+/* On some architectures it's safe to do unserialized accept()s in the single
+ * Listen case. But it's never safe to do it in the case where there's
+ * multiple Listen statements. Define SINGLE_LISTEN_UNSERIALIZED_ACCEPT
+ * when it's safe in the single Listen case.
+ */
+#ifdef SINGLE_LISTEN_UNSERIALIZED_ACCEPT
+#define SAFE_ACCEPT(stmt) do {if (ap_listeners->next) {stmt;}} while(0)
+#else
+#define SAFE_ACCEPT(stmt) do {stmt;} while(0)
+#endif
+
+
+/*****************************************************************
+ * dealing with other children
+ */
+
+#ifdef HAS_OTHER_CHILD
+API_EXPORT(void) ap_register_other_child(int pid,
+ void (*maintenance) (int reason, void *, ap_wait_t status),
+ void *data, int write_fd)
+{
+ other_child_rec *ocr;
+
+ ocr = ap_palloc(pconf, sizeof(*ocr));
+ ocr->pid = pid;
+ ocr->maintenance = maintenance;
+ ocr->data = data;
+ ocr->write_fd = write_fd;
+ ocr->next = other_children;
+ other_children = ocr;
+}
+
+/* note that since this can be called by a maintenance function while we're
+ * scanning the other_children list, all scanners should protect themself
+ * by loading ocr->next before calling any maintenance function.
+ */
+API_EXPORT(void) ap_unregister_other_child(void *data)
+{
+ other_child_rec **pocr, *nocr;
+
+ for (pocr = &other_children; *pocr; pocr = &(*pocr)->next) {
+ if ((*pocr)->data == data) {
+ nocr = (*pocr)->next;
+ (*(*pocr)->maintenance) (OC_REASON_UNREGISTER, (*pocr)->data, -1);
+ *pocr = nocr;
+ /* XXX: um, well we've just wasted some space in pconf ? */
+ return;
+ }
+ }
+}
+
+/* test to ensure that the write_fds are all still writable, otherwise
+ * invoke the maintenance functions as appropriate */
+static void probe_writable_fds(void)
+{
+ fd_set writable_fds;
+ int fd_max;
+ other_child_rec *ocr, *nocr;
+ struct timeval tv;
+ int rc;
+
+ if (other_children == NULL)
+ return;
+
+ fd_max = 0;
+ FD_ZERO(&writable_fds);
+ do {
+ for (ocr = other_children; ocr; ocr = ocr->next) {
+ if (ocr->write_fd == -1)
+ continue;
+ FD_SET(ocr->write_fd, &writable_fds);
+ if (ocr->write_fd > fd_max) {
+ fd_max = ocr->write_fd;
+ }
+ }
+ if (fd_max == 0)
+ return;
+
+ tv.tv_sec = 0;
+ tv.tv_usec = 0;
+ rc = ap_select(fd_max + 1, NULL, &writable_fds, NULL, &tv);
+ } while (rc == -1 && errno == EINTR);
+
+ if (rc == -1) {
+ /* XXX: uhh this could be really bad, we could have a bad file
+ * descriptor due to a bug in one of the maintenance routines */
+ ap_log_unixerr("probe_writable_fds", "select",
+ "could not probe writable fds", server_conf);
+ return;
+ }
+ if (rc == 0)
+ return;
+
+ for (ocr = other_children; ocr; ocr = nocr) {
+ nocr = ocr->next;
+ if (ocr->write_fd == -1)
+ continue;
+ if (FD_ISSET(ocr->write_fd, &writable_fds))
+ continue;
+ (*ocr->maintenance) (OC_REASON_UNWRITABLE, ocr->data, -1);
+ }
+}
+
+/* possibly reap an other_child, return 0 if yes, -1 if not */
+static int reap_other_child(int pid, ap_wait_t status)
+{
+ other_child_rec *ocr, *nocr;
+
+ for (ocr = other_children; ocr; ocr = nocr) {
+ nocr = ocr->next;
+ if (ocr->pid != pid)
+ continue;
+ ocr->pid = -1;
+ (*ocr->maintenance) (OC_REASON_DEATH, ocr->data, status);
+ return 0;
+ }
+ return -1;
+}
+#endif
+
+API_EXPORT(int) ap_exists_scoreboard_image(void)
+{
+ return (ap_scoreboard_image ? 1 : 0);
+}
+
+int ap_update_child_status(int child_num, int status, request_rec *r)
+{
+ int old_status;
+ short_score *ss;
+
+ if (child_num < 0)
+ return -1;
+
+ ap_check_signals();
+
+ ss = &ap_scoreboard_image->servers[child_num];
+ old_status = ss->status;
+ ss->status = status;
+
+ if (ap_extended_status) {
+ if (status == SERVER_READY || status == SERVER_DEAD) {
+ /*
+ * Reset individual counters
+ */
+ if (status == SERVER_DEAD) {
+ ss->my_access_count = 0L;
+ ss->my_bytes_served = 0L;
+ }
+ ss->conn_count = (unsigned short) 0;
+ ss->conn_bytes = (unsigned long) 0;
+ }
+ if (r) {
+ conn_rec *c = r->connection;
+ ap_cpystrn(ss->client, ap_get_remote_host(c, r->per_dir_config,
+ REMOTE_NOLOOKUP), sizeof(ss->client));
+ if (r->the_request == NULL) {
+ ap_cpystrn(ss->request, "NULL", sizeof(ss->request));
+ } else if (r->parsed_uri.password == NULL) {
+ ap_cpystrn(ss->request, r->the_request, sizeof(ss->request));
+ } else {
+ /* Don't reveal the password in the server-status view */
+ ap_cpystrn(ss->request, ap_pstrcat(r->pool, r->method, " ",
+ ap_unparse_uri_components(r->pool, &r->parsed_uri, UNP_OMITPASSWORD),
+ r->assbackwards ? NULL : " ", r->protocol, NULL),
+ sizeof(ss->request));
+ }
+ ss->vhostrec = r->server;
+ }
+ }
+ if (status == SERVER_STARTING && r == NULL) {
+ /* clean up the slot's vhostrec pointer (maybe re-used)
+ * and mark the slot as belonging to a new generation.
+ */
+ ss->vhostrec = NULL;
+ ap_scoreboard_image->parent[child_num].generation = THREAD_GLOBAL(ap_my_generation);
+ }
+
+ return old_status;
+}
+
+void ap_time_process_request(int child_num, int status)
+{
+ short_score *ss;
+#if defined(NO_GETTIMEOFDAY) && !defined(NO_TIMES)
+ struct tms tms_blk;
+#endif
+
+ if (child_num < 0)
+ return;
+
+ ss = &ap_scoreboard_image->servers[child_num];
+
+ if (status == START_PREQUEST) {
+#if defined(NO_GETTIMEOFDAY)
+#ifndef NO_TIMES
+ if ((ss->start_time = times(&tms_blk)) == -1)
+#endif /* NO_TIMES */
+ ss->start_time = (clock_t) 0;
+#else
+ if (gettimeofday(&ss->start_time, (struct timezone *) 0) < 0)
+ ss->start_time.tv_sec =
+ ss->start_time.tv_usec = 0L;
+#endif
+ }
+ else if (status == STOP_PREQUEST) {
+#if defined(NO_GETTIMEOFDAY)
+#ifndef NO_TIMES
+ if ((ss->stop_time = times(&tms_blk)) == -1)
+#endif
+ ss->stop_time = ss->start_time = (clock_t) 0;
+#else
+ if (gettimeofday(&ss->stop_time, (struct timezone *) 0) < 0)
+ ss->stop_time.tv_sec =
+ ss->stop_time.tv_usec =
+ ss->start_time.tv_sec =
+ ss->start_time.tv_usec = 0L;
+#endif
+
+ }
+}
+
+static void increment_counts(int child_num, request_rec *r)
+{
+ long int bs = 0;
+ short_score *ss;
+
+ ss = &ap_scoreboard_image->servers[child_num];
+
+ if (r->sent_bodyct)
+ ap_bgetopt(r->connection->client, BO_BYTECT, &bs);
+
+#ifndef NO_TIMES
+ times(&ss->times);
+#endif
+ ss->access_count++;
+ ss->my_access_count++;
+ ss->conn_count++;
+ ss->bytes_served += (unsigned long) bs;
+ ss->my_bytes_served += (unsigned long) bs;
+ ss->conn_bytes += (unsigned long) bs;
+}
+
+static int find_child_by_pid(int pid)
+{
+ int i;
+
+ for (i = 0; i < max_daemons_limit; ++i)
+ if (ap_scoreboard_image->parent[i].pid == pid)
+ return i;
+
+ return -1;
+}
+
+/* Finally, this routine is used by the caretaker process to wait for
+ * a while...
+ */
+
+/* number of calls to wait_or_timeout between writable probes */
+#ifndef INTERVAL_OF_WRITABLE_PROBES
+#define INTERVAL_OF_WRITABLE_PROBES 10
+#endif
+static int wait_or_timeout_counter;
+
+static int wait_or_timeout(ap_wait_t *status)
+{
+ struct timeval tv;
+ int ret;
+
+ ++wait_or_timeout_counter;
+ if (wait_or_timeout_counter == INTERVAL_OF_WRITABLE_PROBES) {
+ wait_or_timeout_counter = 0;
+#ifdef HAS_OTHER_CHILD
+ probe_writable_fds();
+#endif
+ }
+ ret = waitpid(-1, status, WNOHANG);
+ if (ret == -1 && errno == EINTR) {
+ return -1;
+ }
+ if (ret > 0) {
+ return ret;
+ }
+ tv.tv_sec = SCOREBOARD_MAINTENANCE_INTERVAL / 1000000;
+ tv.tv_usec = SCOREBOARD_MAINTENANCE_INTERVAL % 1000000;
+ ap_select(0, NULL, NULL, NULL, &tv);
+ return -1;
+}
+
+
+#if defined(NSIG)
+#define NumSIG NSIG
+#elif defined(_NSIG)
+#define NumSIG _NSIG
+#elif defined(__NSIG)
+#define NumSIG __NSIG
+#else
+#define NumSIG 32 /* for 1998's unixes, this is still a good assumption */
+#endif
+
+#ifdef SYS_SIGLIST /* platform has sys_siglist[] */
+#define INIT_SIGLIST() /*nothing*/
+#else /* platform has no sys_siglist[], define our own */
+#define SYS_SIGLIST ap_sys_siglist
+#define INIT_SIGLIST() siglist_init();
+
+const char *ap_sys_siglist[NumSIG];
+
+static void siglist_init(void)
+{
+ int sig;
+
+ ap_sys_siglist[0] = "Signal 0";
+#ifdef SIGHUP
+ ap_sys_siglist[SIGHUP] = "Hangup";
+#endif
+#ifdef SIGINT
+ ap_sys_siglist[SIGINT] = "Interrupt";
+#endif
+#ifdef SIGQUIT
+ ap_sys_siglist[SIGQUIT] = "Quit";
+#endif
+#ifdef SIGILL
+ ap_sys_siglist[SIGILL] = "Illegal instruction";
+#endif
+#ifdef SIGTRAP
+ ap_sys_siglist[SIGTRAP] = "Trace/BPT trap";
+#endif
+#ifdef SIGIOT
+ ap_sys_siglist[SIGIOT] = "IOT instruction";
+#endif
+#ifdef SIGABRT
+ ap_sys_siglist[SIGABRT] = "Abort";
+#endif
+#ifdef SIGEMT
+ ap_sys_siglist[SIGEMT] = "Emulator trap";
+#endif
+#ifdef SIGFPE
+ ap_sys_siglist[SIGFPE] = "Arithmetic exception";
+#endif
+#ifdef SIGKILL
+ ap_sys_siglist[SIGKILL] = "Killed";
+#endif
+#ifdef SIGBUS
+ ap_sys_siglist[SIGBUS] = "Bus error";
+#endif
+#ifdef SIGSEGV
+ ap_sys_siglist[SIGSEGV] = "Segmentation fault";
+#endif
+#ifdef SIGSYS
+ ap_sys_siglist[SIGSYS] = "Bad system call";
+#endif
+#ifdef SIGPIPE
+ ap_sys_siglist[SIGPIPE] = "Broken pipe";
+#endif
+#ifdef SIGALRM
+ ap_sys_siglist[SIGALRM] = "Alarm clock";
+#endif
+#ifdef SIGTERM
+ ap_sys_siglist[SIGTERM] = "Terminated";
+#endif
+#ifdef SIGUSR1
+ ap_sys_siglist[SIGUSR1] = "User defined signal 1";
+#endif
+#ifdef SIGUSR2
+ ap_sys_siglist[SIGUSR2] = "User defined signal 2";
+#endif
+#ifdef SIGCLD
+ ap_sys_siglist[SIGCLD] = "Child status change";
+#endif
+#ifdef SIGCHLD
+ ap_sys_siglist[SIGCHLD] = "Child status change";
+#endif
+#ifdef SIGPWR
+ ap_sys_siglist[SIGPWR] = "Power-fail restart";
+#endif
+#ifdef SIGWINCH
+ ap_sys_siglist[SIGWINCH] = "Window changed";
+#endif
+#ifdef SIGURG
+ ap_sys_siglist[SIGURG] = "urgent socket condition";
+#endif
+#ifdef SIGPOLL
+ ap_sys_siglist[SIGPOLL] = "Pollable event occurred";
+#endif
+#ifdef SIGIO
+ ap_sys_siglist[SIGIO] = "socket I/O possible";
+#endif
+#ifdef SIGSTOP
+ ap_sys_siglist[SIGSTOP] = "Stopped (signal)";
+#endif
+#ifdef SIGTSTP
+ ap_sys_siglist[SIGTSTP] = "Stopped";
+#endif
+#ifdef SIGCONT
+ ap_sys_siglist[SIGCONT] = "Continued";
+#endif
+#ifdef SIGTTIN
+ ap_sys_siglist[SIGTTIN] = "Stopped (tty input)";
+#endif
+#ifdef SIGTTOU
+ ap_sys_siglist[SIGTTOU] = "Stopped (tty output)";
+#endif
+#ifdef SIGVTALRM
+ ap_sys_siglist[SIGVTALRM] = "virtual timer expired";
+#endif
+#ifdef SIGPROF
+ ap_sys_siglist[SIGPROF] = "profiling timer expired";
+#endif
+#ifdef SIGXCPU
+ ap_sys_siglist[SIGXCPU] = "exceeded cpu limit";
+#endif
+#ifdef SIGXFSZ
+ ap_sys_siglist[SIGXFSZ] = "exceeded file size limit";
+#endif
+ for (sig=0; sig < sizeof(ap_sys_siglist)/sizeof(ap_sys_siglist[0]); ++sig)
+ if (ap_sys_siglist[sig] == NULL)
+ ap_sys_siglist[sig] = "";
+}
+#endif /* platform has sys_siglist[] */
+
+
+/* handle all varieties of core dumping signals */
+static void sig_coredump(int sig)
+{
+ chdir(ap_coredump_dir);
+ signal(sig, SIG_DFL);
+ kill(getpid(), sig);
+ /* At this point we've got sig blocked, because we're still inside
+ * the signal handler. When we leave the signal handler it will
+ * be unblocked, and we'll take the signal... and coredump or whatever
+ * is appropriate for this particular Unix. In addition the parent
+ * will see the real signal we received -- whereas if we called
+ * abort() here, the parent would only see SIGABRT.
+ */
+}
+
+/*****************************************************************
+ * Connection structures and accounting...
+ */
+
+static void just_die(int sig)
+{
+ clean_child_exit(0);
+}
+
+static int volatile deferred_die;
+static int volatile usr1_just_die;
+
+static void usr1_handler(int sig)
+{
+ if (usr1_just_die) {
+ just_die(sig);
+ }
+ deferred_die = 1;
+}
+
+/* volatile just in case */
+static int volatile shutdown_pending;
+static int volatile restart_pending;
+static int volatile is_graceful;
+
+static void sig_term(int sig)
+{
+ if (shutdown_pending == 1) {
+ /* Um, is this _probably_ not an error, if the user has
+ * tried to do a shutdown twice quickly, so we won't
+ * worry about reporting it.
+ */
+ return;
+ }
+ shutdown_pending = 1;
+}
+
+static void restart(int sig)
+{
+ if (restart_pending == 1) {
+ /* Probably not an error - don't bother reporting it */
+ return;
+ }
+ restart_pending = 1;
+ is_graceful = sig == SIGUSR1;
+}
+
+static void set_signals(void)
+{
+#ifndef NO_USE_SIGACTION
+ struct sigaction sa;
+
+ sigemptyset(&sa.sa_mask);
+ sa.sa_flags = 0;
+
+ if (!one_process) {
+ sa.sa_handler = sig_coredump;
+#if defined(SA_ONESHOT)
+ sa.sa_flags = SA_ONESHOT;
+#elif defined(SA_RESETHAND)
+ sa.sa_flags = SA_RESETHAND;
+#endif
+ if (sigaction(SIGSEGV, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "sigaction(SIGSEGV)");
+#ifdef SIGBUS
+ if (sigaction(SIGBUS, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "sigaction(SIGBUS)");
+#endif
+#ifdef SIGABORT
+ if (sigaction(SIGABORT, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "sigaction(SIGABORT)");
+#endif
+#ifdef SIGABRT
+ if (sigaction(SIGABRT, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "sigaction(SIGABRT)");
+#endif
+#ifdef SIGILL
+ if (sigaction(SIGILL, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "sigaction(SIGILL)");
+#endif
+ sa.sa_flags = 0;
+ }
+ sa.sa_handler = sig_term;
+ if (sigaction(SIGTERM, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "sigaction(SIGTERM)");
+#ifdef SIGINT
+ if (sigaction(SIGINT, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "sigaction(SIGINT)");
+#endif
+#ifdef SIGXCPU
+ sa.sa_handler = SIG_DFL;
+ if (sigaction(SIGXCPU, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "sigaction(SIGXCPU)");
+#endif
+#ifdef SIGXFSZ
+ sa.sa_handler = SIG_DFL;
+ if (sigaction(SIGXFSZ, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "sigaction(SIGXFSZ)");
+#endif
+#ifdef SIGPIPE
+ sa.sa_handler = SIG_IGN;
+ if (sigaction(SIGPIPE, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "sigaction(SIGPIPE)");
+#endif
+
+ /* we want to ignore HUPs and USR1 while we're busy processing one */
+ sigaddset(&sa.sa_mask, SIGHUP);
+ sigaddset(&sa.sa_mask, SIGUSR1);
+ sa.sa_handler = restart;
+ if (sigaction(SIGHUP, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "sigaction(SIGHUP)");
+ if (sigaction(SIGUSR1, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "sigaction(SIGUSR1)");
+#else
+ if (!one_process) {
+ signal(SIGSEGV, sig_coredump);
+#ifdef SIGBUS
+ signal(SIGBUS, sig_coredump);
+#endif /* SIGBUS */
+#ifdef SIGABORT
+ signal(SIGABORT, sig_coredump);
+#endif /* SIGABORT */
+#ifdef SIGABRT
+ signal(SIGABRT, sig_coredump);
+#endif /* SIGABRT */
+#ifdef SIGILL
+ signal(SIGILL, sig_coredump);
+#endif /* SIGILL */
+#ifdef SIGXCPU
+ signal(SIGXCPU, SIG_DFL);
+#endif /* SIGXCPU */
+#ifdef SIGXFSZ
+ signal(SIGXFSZ, SIG_DFL);
+#endif /* SIGXFSZ */
+ }
+
+ signal(SIGTERM, sig_term);
+#ifdef SIGHUP
+ signal(SIGHUP, restart);
+#endif /* SIGHUP */
+#ifdef SIGUSR1
+ signal(SIGUSR1, restart);
+#endif /* SIGUSR1 */
+#ifdef SIGPIPE
+ signal(SIGPIPE, SIG_IGN);
+#endif /* SIGPIPE */
+
+#endif
+}
+
+#if defined(TCP_NODELAY) && !defined(MPE) && !defined(TPF)
+static void sock_disable_nagle(int s)
+{
+ /* The Nagle algorithm says that we should delay sending partial
+ * packets in hopes of getting more data. We don't want to do
+ * this; we are not telnet. There are bad interactions between
+ * persistent connections and Nagle's algorithm that have very severe
+ * performance penalties. (Failing to disable Nagle is not much of a
+ * problem with simple HTTP.)
+ *
+ * In spite of these problems, failure here is not a shooting offense.
+ */
+ int just_say_no = 1;
+
+ if (setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (char *) &just_say_no,
+ sizeof(int)) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
+ "setsockopt: (TCP_NODELAY)");
+ }
+}
+
+#else
+#define sock_disable_nagle(s) /* NOOP */
+#endif
+
+
+/*****************************************************************
+ * Child process main loop.
+ * The following vars are static to avoid getting clobbered by longjmp();
+ * they are really private to child_main.
+ */
+
+API_EXPORT(void) ap_child_terminate(request_rec *r)
+{
+ r->connection->keepalive = 0;
+ THREAD_GLOBAL(requests_this_child) = ap_max_requests_per_child = 1;
+}
+
+int ap_graceful_stop_signalled(void)
+{
+ if (deferred_die ||
+ ap_scoreboard_image->global.running_generation != THREAD_GLOBAL(ap_my_generation)) {
+ return 1;
+ }
+ return 0;
+}
+
+static void child_main(void *child_num_arg)
+{
+ NET_SIZE_T clen;
+ struct sockaddr sa_server;
+ struct sockaddr sa_client;
+ ap_listen_rec *lr;
+ ap_listen_rec *last_lr;
+ pool *ptrans;
+ conn_rec *current_conn;
+ int my_child_num = (int)child_num_arg;
+ ap_iol *iol;
+
+ my_pid = getpid();
+ last_lr = NULL;
+
+ /* Disable the restart signal handlers and enable the just_die stuff.
+ * Note that since restart() just notes that a restart has been
+ * requested there's no race condition here.
+ */
+ signal(SIGHUP, just_die);
+ signal(SIGUSR1, just_die);
+ signal(SIGTERM, just_die);
+
+ /* Get a sub pool for global allocations in this child, so that
+ * we can have cleanups occur when the child exits.
+ */
+ pchild = ap_make_sub_pool(pconf);
+ *ppthread_globals = (struct thread_globals *)ap_palloc(pchild, sizeof(struct thread_globals));
+ THREAD_GLOBAL(ap_my_generation) = 0;
+ THREAD_GLOBAL(requests_this_child) = 0;
+ THREAD_GLOBAL(csd) = -1;
+ ptrans = ap_make_sub_pool(pchild);
+
+ /* needs to be done before we switch UIDs so we have permissions */
+ SAFE_ACCEPT(accept_mutex_child_init(pchild));
+
+ ap_child_init_hook(pchild, server_conf);
+
+ (void) ap_update_child_status(my_child_num, SERVER_READY, (request_rec *) NULL);
+
+ signal(SIGHUP, just_die);
+ signal(SIGTERM, just_die);
+ set_signals();
+
+ while (!ap_graceful_stop_signalled()) {
+ BUFF *conn_io;
+
+ /* Prepare to receive a SIGUSR1 due to graceful restart so that
+ * we can exit cleanly.
+ */
+ usr1_just_die = 1;
+ signal(SIGUSR1, usr1_handler);
+
+ /*
+ * (Re)initialize this child to a pre-connection state.
+ */
+
+ current_conn = NULL;
+
+ ap_clear_pool(ptrans);
+
+ if ((ap_max_requests_per_child > 0
+ && THREAD_GLOBAL(requests_this_child)++ >= ap_max_requests_per_child)) {
+ clean_child_exit(0);
+ }
+
+ (void) ap_update_child_status(my_child_num, SERVER_READY, (request_rec *) NULL);
+
+ /*
+ * Wait for an acceptable connection to arrive.
+ */
+
+ /* Lock around "accept", if necessary */
+ SAFE_ACCEPT(accept_mutex_on());
+
+ for (;;) {
+ if (ap_listeners->next) {
+ /* more than one socket */
+ memcpy(&THREAD_GLOBAL(main_fds), &listenfds, sizeof(fd_set));
+ THREAD_GLOBAL(srv) = ap_select(listenmaxfd + 1, &THREAD_GLOBAL(main_fds), NULL, NULL, NULL);
+
+ if (THREAD_GLOBAL(srv) < 0 && errno != EINTR) {
+ /* Single Unix documents select as returning errnos
+ * EBADF, EINTR, and EINVAL... and in none of those
+ * cases does it make sense to continue. In fact
+ * on Linux 2.0.x we seem to end up with EFAULT
+ * occasionally, and we'd loop forever due to it.
+ */
+ ap_log_error(APLOG_MARK, APLOG_ERR, server_conf, "select: (listen)");
+ clean_child_exit(1);
+ }
+
+ if (THREAD_GLOBAL(srv) <= 0)
+ continue;
+
+ /* we remember the last_lr we searched last time around so that
+ we don't end up starving any particular listening socket */
+ if (last_lr == NULL) {
+ lr = ap_listeners;
+ }
+ else {
+ lr = last_lr->next;
+ }
+ while (lr != last_lr) {
+ if (!lr) {
+ lr = ap_listeners;
+ }
+ if (FD_ISSET(lr->fd, &THREAD_GLOBAL(main_fds))) break;
+ lr = lr->next;
+ }
+ if (lr == last_lr) {
+ continue;
+ }
+ last_lr = lr;
+ sd = lr->fd;
+ }
+ else {
+ /* only one socket, just pretend we did the other stuff */
+ sd = ap_listeners->fd;
+ }
+
+ /* if we accept() something we don't want to die, so we have to
+ * defer the exit
+ */
+ usr1_just_die = 0;
+ for (;;) {
+ if (deferred_die) {
+ /* we didn't get a socket, and we were told to die */
+ clean_child_exit(0);
+ }
+ clen = sizeof(sa_client);
+ THREAD_GLOBAL(csd) = ap_accept(sd, &sa_client, &clen);
+ if (THREAD_GLOBAL(csd) >= 0 || errno != EINTR)
+ break;
+ }
+
+ if (THREAD_GLOBAL(csd) >= 0)
+ break; /* We have a socket ready for reading */
+ else {
+
+ /* Our old behaviour here was to continue after accept()
+ * errors. But this leads us into lots of troubles
+ * because most of the errors are quite fatal. For
+ * example, EMFILE can be caused by slow descriptor
+ * leaks (say in a 3rd party module, or libc). It's
+ * foolish for us to continue after an EMFILE. We also
+ * seem to tickle kernel bugs on some platforms which
+ * lead to never-ending loops here. So it seems best
+ * to just exit in most cases.
+ */
+ switch (errno) {
+#ifdef EPROTO
+ /* EPROTO on certain older kernels really means
+ * ECONNABORTED, so we need to ignore it for them.
+ * See discussion in new-httpd archives nh.9701
+ * search for EPROTO.
+ *
+ * Also see nh.9603, search for EPROTO:
+ * There is potentially a bug in Solaris 2.x x<6,
+ * and other boxes that implement tcp sockets in
+ * userland (i.e. on top of STREAMS). On these
+ * systems, EPROTO can actually result in a fatal
+ * loop. See PR#981 for example. It's hard to
+ * handle both uses of EPROTO.
+ */
+ case EPROTO:
+#endif
+#ifdef ECONNABORTED
+ case ECONNABORTED:
+#endif
+ /* Linux generates the rest of these, other tcp
+ * stacks (i.e. bsd) tend to hide them behind
+ * getsockopt() interfaces. They occur when
+ * the net goes sour or the client disconnects
+ * after the three-way handshake has been done
+ * in the kernel but before userland has picked
+ * up the socket.
+ */
+#ifdef ECONNRESET
+ case ECONNRESET:
+#endif
+#ifdef ETIMEDOUT
+ case ETIMEDOUT:
+#endif
+#ifdef EHOSTUNREACH
+ case EHOSTUNREACH:
+#endif
+#ifdef ENETUNREACH
+ case ENETUNREACH:
+#endif
+ break;
+ default:
+ ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
+ "accept: (client socket)");
+ clean_child_exit(1);
+ }
+ }
+
+ if (ap_graceful_stop_signalled()) {
+ clean_child_exit(0);
+ }
+ usr1_just_die = 1;
+ }
+
+ SAFE_ACCEPT(accept_mutex_off()); /* unlock after "accept" */
+
+ /* We've got a socket, let's at least process one request off the
+ * socket before we accept a graceful restart request. We set
+ * the signal to ignore because we don't want to disturb any
+ * third party code.
+ */
+ signal(SIGUSR1, SIG_IGN);
+
+ /*
+ * We now have a connection, so set it up with the appropriate
+ * socket options, file descriptors, and read/write buffers.
+ */
+
+ clen = sizeof(sa_server);
+ if (getsockname(THREAD_GLOBAL(csd), &sa_server, &clen) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, server_conf, "getsockname");
+ close(THREAD_GLOBAL(csd));
+ continue;
+ }
+
+ sock_disable_nagle(THREAD_GLOBAL(csd));
+
+ iol = os2_attach_socket(THREAD_GLOBAL(csd));
+
+ if (iol == NULL) {
+ if (errno == EBADF) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, NULL,
+ "filedescriptor (%u) larger than FD_SETSIZE (%u) "
+ "found, you probably need to rebuild Apache with a "
+ "larger FD_SETSIZE", THREAD_GLOBAL(csd), FD_SETSIZE);
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, NULL,
+ "error attaching to socket");
+ }
+ close(THREAD_GLOBAL(csd));
+ continue;
+ }
+
+ (void) ap_update_child_status(my_child_num, SERVER_BUSY_READ,
+ (request_rec *) NULL);
+
+ conn_io = ap_bcreate(ptrans, B_RDWR);
+ ap_bpush_iol(conn_io, iol);
+
+ current_conn = ap_new_connection(ptrans, server_conf, conn_io,
+ (struct sockaddr_in *) &sa_client,
+ (struct sockaddr_in *) &sa_server,
+ my_child_num, 0);
+
+ ap_process_connection(current_conn);
+ }
+}
+
+
+static int make_child(server_rec *s, int slot, time_t now)
+{
+ TID tid;
+
+ if (slot + 1 > max_daemons_limit) {
+ max_daemons_limit = slot + 1;
+ }
+
+ if (one_process) {
+ struct thread_globals *parent_globals = *ppthread_globals;
+ signal(SIGHUP, just_die);
+ signal(SIGINT, just_die);
+#ifdef SIGQUIT
+ signal(SIGQUIT, SIG_DFL);
+#endif
+ signal(SIGTERM, just_die);
+ child_main((void *)slot);
+ *ppthread_globals = parent_globals;
+ }
+
+ ap_update_child_status(slot, SERVER_STARTING, (request_rec *) NULL);
+fprintf(stderr, "Starting thread %d\n", slot);
+
+ if ((tid = _beginthread(child_main, NULL, 65536, (void *)slot)) == -1) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, s, "_beginthread: Unable to create new thread");
+
+ /* _beginthread didn't succeed. Fix the scoreboard or else
+ * it will say SERVER_STARTING forever and ever
+ */
+ (void) ap_update_child_status(slot, SERVER_DEAD, (request_rec *) NULL);
+
+ /* In case system resources are maxxed out, we don't want
+ Apache running away with the CPU trying to _beginthread over and
+ over and over again. */
+ sleep(10);
+
+ return -1;
+ }
+
+ ap_scoreboard_image->parent[slot].pid = tid;
+ return 0;
+}
+
+
+/* start up a bunch of children */
+static void startup_children(int number_to_start)
+{
+ int i;
+ time_t now = time(0);
+
+ for (i = 0; number_to_start && i < ap_daemons_limit; ++i) {
+ if (ap_scoreboard_image->servers[i].status != SERVER_DEAD) {
+ continue;
+ }
+ if (make_child(server_conf, i, now) < 0) {
+ break;
+ }
+ --number_to_start;
+ }
+}
+
+
+/*
+ * idle_spawn_rate is the number of children that will be spawned on the
+ * next maintenance cycle if there aren't enough idle servers. It is
+ * doubled up to MAX_SPAWN_RATE, and reset only when a cycle goes by
+ * without the need to spawn.
+ */
+static int idle_spawn_rate = 1;
+#ifndef MAX_SPAWN_RATE
+#define MAX_SPAWN_RATE (32)
+#endif
+static int hold_off_on_exponential_spawning;
+
+static void perform_idle_server_maintenance(void)
+{
+ int i;
+ int to_kill;
+ int idle_count;
+ short_score *ss;
+ time_t now = time(0);
+ 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 >= max_daemons_limit && free_length == idle_spawn_rate)
+ break;
+ ss = &ap_scoreboard_image->servers[i];
+ status = ss->status;
+ if (status == SERVER_DEAD) {
+ /* try to keep children numbers as low as possible */
+ if (free_length < idle_spawn_rate) {
+ free_slots[free_length] = i;
+ ++free_length;
+ }
+ }
+ else {
+ /* We consider a starting server as idle because we started it
+ * at least a cycle ago, and if it still hasn't finished starting
+ * then we're just going to swamp things worse by forking more.
+ * So we hopefully won't need to fork more if we count it.
+ * This depends on the ordering of SERVER_READY and SERVER_STARTING.
+ */
+ if (status <= SERVER_READY) {
+ ++ idle_count;
+ /* always kill the highest numbered child if we have to...
+ * no really well thought out reason ... other than observing
+ * the server behaviour under linux where lower numbered children
+ * tend to service more hits (and hence are more likely to have
+ * their data in cpu caches).
+ */
+ to_kill = i;
+ }
+
+ ++total_non_dead;
+ last_non_dead = i;
+ }
+ }
+ max_daemons_limit = last_non_dead + 1;
+ if (idle_count > ap_daemons_max_free) {
+ /* kill off one child... we use SIGUSR1 because that'll cause it to
+ * shut down gracefully, in case it happened to pick up a request
+ * while we were counting
+ */
+ kill(ap_scoreboard_image->parent[to_kill].pid, SIGUSR1);
+ 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_NOERRNO|APLOG_ERR, 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_NOERRNO|APLOG_INFO, 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) {
+ make_child(server_conf, free_slots[i], now);
+ }
+ /* the next time around we want to spawn twice as many if this
+ * wasn't good enough, but not if we've just done a graceful
+ */
+ if (hold_off_on_exponential_spawning) {
+ --hold_off_on_exponential_spawning;
+ }
+ else if (idle_spawn_rate < MAX_SPAWN_RATE) {
+ idle_spawn_rate *= 2;
+ }
+ }
+ }
+ else {
+ idle_spawn_rate = 1;
+ }
+}
+
+
+static void process_child_status(int pid, ap_wait_t status)
+{
+ /* Child died... if it died due to a fatal error,
+ * we should simply bail out.
+ */
+ if ((WIFEXITED(status)) &&
+ WEXITSTATUS(status) == APEXIT_CHILDFATAL) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT|APLOG_NOERRNO, server_conf,
+ "Child %d returned a Fatal error... \n"
+ "Apache is exiting!",
+ pid);
+ exit(APEXIT_CHILDFATAL);
+ }
+ if (WIFSIGNALED(status)) {
+ switch (WTERMSIG(status)) {
+ case SIGTERM:
+ case SIGHUP:
+ case SIGUSR1:
+ case SIGKILL:
+ break;
+ default:
+#ifdef SYS_SIGLIST
+#ifdef WCOREDUMP
+ if (WCOREDUMP(status)) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE,
+ server_conf,
+ "child pid %d exit signal %s (%d), "
+ "possible coredump in %s",
+ pid, (WTERMSIG(status) >= NumSIG) ? "" :
+ SYS_SIGLIST[WTERMSIG(status)], WTERMSIG(status),
+ ap_coredump_dir);
+ }
+ else {
+#endif
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE,
+ server_conf,
+ "child pid %d exit signal %s (%d)", pid,
+ SYS_SIGLIST[WTERMSIG(status)], WTERMSIG(status));
+#ifdef WCOREDUMP
+ }
+#endif
+#else
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE,
+ server_conf,
+ "child pid %d exit signal %d",
+ pid, WTERMSIG(status));
+#endif
+ }
+ }
+}
+
+
+static int setup_listeners(pool *pconf, server_rec *s)
+{
+ ap_listen_rec *lr;
+
+ if (ap_listen_open(pconf, s->port)) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ALERT, s,
+ "no listening sockets available, shutting down");
+ return -1;
+ }
+
+ listenmaxfd = -1;
+ FD_ZERO(&listenfds);
+ for (lr = ap_listeners; lr; lr = lr->next) {
+ FD_SET(lr->fd, &listenfds);
+ if (lr->fd > listenmaxfd) {
+ listenmaxfd = lr->fd;
+ }
+ }
+ return 0;
+}
+
+
+/*****************************************************************
+ * Executive routines.
+ */
+
+int ap_mpm_run(pool *_pconf, pool *plog, server_rec *s)
+{
+ int remaining_children_to_start;
+
+ pconf = _pconf;
+
+ server_conf = s;
+
+ ap_log_pid(pconf, ap_pid_fname);
+
+ if (setup_listeners(pconf, s)) {
+ /* XXX: hey, what's the right way for the mpm to indicate a fatal error? */
+ return 1;
+ }
+
+ SAFE_ACCEPT(accept_mutex_init(pconf));
+
+ if (!is_graceful) {
+ reinit_scoreboard(pconf);
+ }
+
+ set_signals();
+
+ if (ppthread_globals == NULL) {
+ if (DosAllocThreadLocalMemory(1, (PULONG *)&ppthread_globals)) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT|APLOG_NOERRNO, server_conf,
+ "Error allocating thread local storage"
+ "Apache is exiting!");
+ } else {
+ *ppthread_globals = (struct thread_globals *)ap_palloc(pconf, sizeof(struct thread_globals));
+ }
+ }
+
+ if (ap_daemons_max_free < ap_daemons_min_free + 1) /* Don't thrash... */
+ ap_daemons_max_free = ap_daemons_min_free + 1;
+
+ /* If we're doing a graceful_restart then we're going to see a lot
+ * of children exiting immediately when we get into the main loop
+ * below (because we just sent them SIGUSR1). This happens pretty
+ * rapidly... and for each one that exits we'll start a new one until
+ * we reach at least daemons_min_free. But we may be permitted to
+ * start more than that, so we'll just keep track of how many we're
+ * supposed to start up without the 1 second penalty between each fork.
+ */
+ remaining_children_to_start = ap_daemons_to_start;
+ if (remaining_children_to_start > ap_daemons_limit) {
+ remaining_children_to_start = ap_daemons_limit;
+ }
+ if (!is_graceful) {
+ startup_children(remaining_children_to_start);
+ remaining_children_to_start = 0;
+ }
+ else {
+ /* give the system some time to recover before kicking into
+ * exponential mode */
+ hold_off_on_exponential_spawning = 10;
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, server_conf,
+ "%s configured -- resuming normal operations",
+ ap_get_server_version());
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, server_conf,
+ "Server built: %s", ap_get_server_built());
+ restart_pending = shutdown_pending = 0;
+
+ while (!restart_pending && !shutdown_pending) {
+ int child_slot;
+ ap_wait_t status;
+ int pid = wait_or_timeout(&status);
+
+ /* XXX: if it takes longer than 1 second for all our children
+ * to start up and get into IDLE state then we may spawn an
+ * extra child
+ */
+ if (pid >= 0) {
+ process_child_status(pid, status);
+ /* 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(child_slot, SERVER_DEAD,
+ (request_rec *) NULL);
+ if (remaining_children_to_start
+ && child_slot < ap_daemons_limit) {
+ /* we're still doing a 1-for-1 replacement of dead
+ * children with new children
+ */
+ make_child(server_conf, child_slot, time(0));
+ --remaining_children_to_start;
+ }
+#ifdef HAS_OTHER_CHILD
+ }
+ else if (reap_other_child(pid, status) == 0) {
+ /* handled */
+#endif
+ }
+ else if (is_graceful) {
+ /* Great, we've probably just lost a slot in the
+ * scoreboard. Somehow we don't know about this
+ * child.
+ */
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, server_conf,
+ "long lost child came home! (pid %d)", pid);
+ }
+ /* Don't perform idle maintenance when a child dies,
+ * only do it when there's a timeout. Remember only a
+ * finite number of children can die, and it's pretty
+ * pathological for a lot to die suddenly.
+ */
+ continue;
+ }
+ else if (remaining_children_to_start) {
+ /* we hit a 1 second timeout in which none of the previous
+ * generation of children needed to be reaped... so assume
+ * they're all done, and pick up the slack if any is left.
+ */
+ startup_children(remaining_children_to_start);
+ remaining_children_to_start = 0;
+ /* In any event we really shouldn't do the code below because
+ * few of the servers we just started are in the IDLE state
+ * yet, so we'd mistakenly create an extra server.
+ */
+ continue;
+ }
+
+ perform_idle_server_maintenance();
+ }
+
+ if (shutdown_pending) {
+ /* Time to gracefully shut down:
+ * Kill child processes, tell them to call child_exit, etc...
+ */
+ if (ap_killpg(getpgrp(), SIGTERM) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "killpg 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_NOERRNO|APLOG_INFO,
+ server_conf,
+ "removed PID file %s (pid=%ld)",
+ pidfile, (long)getpid());
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, server_conf,
+ "caught SIGTERM, shutting down");
+ return 1;
+ }
+
+ /* we've been told to restart */
+ signal(SIGHUP, SIG_IGN);
+ signal(SIGUSR1, SIG_IGN);
+
+ if (one_process) {
+ /* not worth thinking about */
+ return 1;
+ }
+
+ /* advance to the next generation */
+ /* XXX: we really need to make sure this new generation number isn't in
+ * use by any of the children.
+ */
+ ++THREAD_GLOBAL(ap_my_generation);
+ ap_scoreboard_image->global.running_generation = THREAD_GLOBAL(ap_my_generation);
+
+ if (is_graceful) {
+#ifndef SCOREBOARD_FILE
+ int i;
+#endif
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, server_conf,
+ "SIGUSR1 received. Doing graceful restart");
+
+ /* kill off the idle ones */
+ if (ap_killpg(getpgrp(), SIGUSR1) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "killpg SIGUSR1");
+ }
+#ifndef SCOREBOARD_FILE
+ /* This is mostly for debugging... so that we know what is still
+ * gracefully dealing with existing request. But we can't really
+ * do it if we're in a SCOREBOARD_FILE because it'll cause
+ * corruption too easily.
+ */
+ for (i = 0; i < ap_daemons_limit; ++i) {
+ if (ap_scoreboard_image->servers[i].status != SERVER_DEAD) {
+ ap_scoreboard_image->servers[i].status = SERVER_GRACEFUL;
+ }
+ }
+#endif
+ }
+ else {
+ /* Kill 'em off */
+ if (ap_killpg(getpgrp(), SIGHUP) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "killpg SIGHUP");
+ }
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, server_conf,
+ "SIGHUP received. Attempting to restart");
+ }
+
+ if (!is_graceful) {
+ ap_restart_time = time(NULL);
+ }
+
+ return 0;
+}
+
+static void spmt_os2_pre_command_line(pool *pcommands)
+{
+ INIT_SIGLIST();
+ /* TODO: set one_process properly */ one_process = 0;
+}
+
+static void spmt_os2_pre_config(pool *pconf, pool *plog, pool *ptemp)
+{
+ static int restart_num = 0;
+
+ one_process = ap_exists_config_define("ONE_PROCESS");
+
+ is_graceful = 0;
+ my_pid = getpid();
+ 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 = HARD_SERVER_LIMIT;
+ ap_pid_fname = DEFAULT_PIDLOG;
+ ap_max_requests_per_child = DEFAULT_MAX_REQUESTS_PER_CHILD;
+ ap_extended_status = 0;
+
+ ap_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir));
+}
+
+static const char *set_pidfile(cmd_parms *cmd, void *dummy, char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ if (cmd->server->is_virtual) {
+ return "PidFile directive not allowed in <VirtualHost>";
+ }
+ ap_pid_fname = arg;
+ return NULL;
+}
+
+static const char *set_daemons_to_start(cmd_parms *cmd, void *dummy, 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, 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) {
+ fprintf(stderr, "WARNING: detected MinSpareServers set to non-positive.\n");
+ fprintf(stderr, "Resetting to 1 to avoid almost certain Apache failure.\n");
+ fprintf(stderr, "Please read the documentation.\n");
+ ap_daemons_min_free = 1;
+ }
+
+ return NULL;
+}
+
+static const char *set_max_free_servers(cmd_parms *cmd, void *dummy, 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_server_limit (cmd_parms *cmd, void *dummy, 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 > HARD_SERVER_LIMIT) {
+ fprintf(stderr, "WARNING: MaxClients of %d exceeds compile time limit "
+ "of %d servers,\n", ap_daemons_limit, HARD_SERVER_LIMIT);
+ fprintf(stderr, " lowering MaxClients to %d. To increase, please "
+ "see the\n", HARD_SERVER_LIMIT);
+ fprintf(stderr, " HARD_SERVER_LIMIT define in src/include/httpd.h.\n");
+ ap_daemons_limit = HARD_SERVER_LIMIT;
+ }
+ else if (ap_daemons_limit < 1) {
+ fprintf(stderr, "WARNING: Require MaxClients > 0, setting to 1\n");
+ ap_daemons_limit = 1;
+ }
+ return NULL;
+}
+
+static const char *set_max_requests(cmd_parms *cmd, void *dummy, char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_max_requests_per_child = atoi(arg);
+
+ return NULL;
+}
+
+static const char *set_coredumpdir (cmd_parms *cmd, void *dummy, char *arg)
+{
+ struct stat finfo;
+ const char *fname;
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ fname = ap_server_root_relative(cmd->pool, arg);
+ /* ZZZ change this to the AP func FileInfo*/
+ if ((stat(fname, &finfo) == -1) || !S_ISDIR(finfo.st_mode)) {
+ return ap_pstrcat(cmd->pool, "CoreDumpDirectory ", fname,
+ " does not exist or is not a directory", NULL);
+ }
+ ap_cpystrn(ap_coredump_dir, fname, sizeof(ap_coredump_dir));
+ return NULL;
+}
+
+
+struct ap_thread_mutex {
+ HMTX mutex_handle;
+};
+
+API_EXPORT(ap_thread_mutex *) ap_thread_mutex_new(void)
+{
+ ULONG rc;
+ ap_thread_mutex *mutex = malloc(sizeof(ap_thread_mutex));
+
+ rc = DosCreateMutexSem(NULL, &mutex->mutex_handle, 0, 0);
+ ap_assert(rc == 0);
+ return mutex;
+}
+
+API_EXPORT(void) ap_thread_mutex_lock(ap_thread_mutex *mtx)
+{
+ ULONG rc;
+ rc = DosRequestMutexSem(mtx->mutex_handle, SEM_INDEFINITE_WAIT);
+ ap_assert(rc == 0);
+}
+
+API_EXPORT(void) ap_thread_mutex_unlock(ap_thread_mutex *mtx)
+{
+ ULONG rc;
+ rc = DosReleaseMutexSem(mtx->mutex_handle);
+ ap_assert(rc == 0);
+}
+
+API_EXPORT(void) ap_thread_mutex_destroy(ap_thread_mutex *mtx)
+{
+ ap_thread_mutex_unlock(mtx);
+ DosCloseMutexSem(mtx->mutex_handle);
+ free(mtx);
+}
+
+
+static const command_rec spmt_os2_cmds[] = {
+LISTEN_COMMANDS
+{ "PidFile", set_pidfile, NULL, RSRC_CONF, TAKE1,
+ "A file for logging the server process ID"},
+{ "StartServers", set_daemons_to_start, NULL, RSRC_CONF, TAKE1,
+ "Number of child processes launched at server startup" },
+{ "MinSpareServers", set_min_free_servers, NULL, RSRC_CONF, TAKE1,
+ "Minimum number of idle children, to handle request spikes" },
+{ "MaxSpareServers", set_max_free_servers, NULL, RSRC_CONF, TAKE1,
+ "Maximum number of idle children" },
+{ "MaxClients", set_server_limit, NULL, RSRC_CONF, TAKE1,
+ "Maximum number of children alive at the same time" },
+{ "MaxRequestsPerChild", set_max_requests, NULL, RSRC_CONF, TAKE1,
+ "Maximum number of requests a particular child serves before dying." },
+{ "CoreDumpDirectory", set_coredumpdir, NULL, RSRC_CONF, TAKE1,
+ "The location of the directory Apache changes to before dumping core" },
+{ NULL }
+};
+
+module MODULE_VAR_EXPORT mpm_spmt_os2_module = {
+ STANDARD20_MODULE_STUFF,
+ spmt_os2_pre_command_line, /* pre_command_line */
+ spmt_os2_pre_config, /* pre_config */
+ NULL, /* post_config */
+ NULL, /* open_logs */
+ NULL, /* child_init */
+ NULL, /* create per-directory config structure */
+ NULL, /* merge per-directory config structures */
+ NULL, /* create per-server config structure */
+ NULL, /* merge per-server config structures */
+ spmt_os2_cmds, /* command table */
+ NULL, /* handlers */
+ NULL, /* check_user_id */
+ NULL, /* check auth */
+ NULL, /* check access */
+ NULL, /* type_checker */
+ NULL, /* pre-run fixups */
+ NULL, /* logger */
+ NULL /* register hooks */
+};
projects / apache / commitdiff