--- /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/>.
+ *
+ */
+
+#define CORE_PRIVATE
+
+#include "httpd.h"
+#include "http_main.h"
+#include "http_log.h"
+#include "http_config.h" /* for read_config */
+#include "http_core.h" /* for get_remote_host */
+#include "http_connection.h"
+#include "ap_mpm.h"
+#include "unixd.h"
+#include "iol_socket.h"
+#include "ap_listen.h"
+#include "scoreboard.h"
+#include "acceptlock.h"
+
+#include <poll.h>
+#include <netinet/tcp.h>
+#include <pthread.h>
+
+/*
+ * Actual definitions of config globals
+ */
+
+int ap_threads_per_child=0; /* Worker threads per child */
+int ap_max_requests_per_child=0;
+static char *ap_pid_fname=NULL;
+static int ap_num_daemons=0;
+static time_t ap_restart_time=0;
+API_VAR_EXPORT int ap_extended_status = 0;
+static int workers_may_exit = 0;
+static int requests_this_child;
+static int num_listenfds = 0;
+static struct pollfd *listenfds;
+
+/* The structure used to pass unique initialization info to each thread */
+typedef struct {
+ int pid;
+ int tid;
+ int sd;
+ pool *tpool; /* "pthread" would be confusing */
+} proc_info;
+
+#if 0
+#define SAFE_ACCEPT(stmt) do {if (ap_listeners->next != NULL) {stmt;}} while (0)
+#else
+#define SAFE_ACCEPT(stmt) do {stmt;} while (0)
+#endif
+
+/*
+ * The max child slot ever assigned, preserved across restarts. Necessary
+ * to deal with NumServers changes across SIGWINCH restarts. We use this
+ * value to optimize routines that have to scan the entire scoreboard.
+ */
+int max_daemons_limit = -1;
+
+
+static char ap_coredump_dir[MAX_STRING_LEN];
+
+static int pipe_of_death[2];
+static pthread_mutex_t pipe_of_death_mutex;
+
+/* *Non*-shared http_main globals... */
+
+static server_rec *server_conf;
+
+/* one_process --- debugging mode variable; can be set from the command line
+ * with the -X flag. If set, this gets you the child_main loop running
+ * in the process which originally started up (no detach, no make_child),
+ * which is a pretty nice debugging environment. (You'll get a SIGHUP
+ * early in standalone_main; just continue through. This is the server
+ * trying to kill off any child processes which it might have lying
+ * around --- Apache doesn't keep track of their pids, it just sends
+ * SIGHUP to the process group, ignoring it in the root process.
+ * Continue through and you'll be fine.).
+ */
+
+static int one_process = 0;
+
+#ifdef DEBUG_SIGSTOP
+int raise_sigstop_flags;
+#endif
+
+#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; /* Linux getpid() doesn't work except in main thread. Use
+ this instead */
+/* Keep track of the number of worker threads currently active */
+static int worker_thread_count;
+static pthread_mutex_t worker_thread_count_mutex;
+
+/* Global, alas, so http_core can talk to us */
+enum server_token_type ap_server_tokens = SrvTk_FULL;
+
+API_EXPORT(const server_rec *) ap_get_server_conf(void)
+{
+ return (server_conf);
+}
+
+/* a clean exit from a child with proper cleanup
+ static void clean_child_exit(int code) __attribute__ ((noreturn)); */
+void clean_child_exit(int code)
+{
+ if (pchild) {
+ ap_destroy_pool(pchild);
+ }
+ exit(code);
+}
+
+/*****************************************************************
+ * 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)
+{
+ return;
+#if 0
+ 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);
+ }
+#endif
+}
+
+/* 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
+
+static void reclaim_child_processes(int terminate)
+{
+ int i, status;
+ long int waittime = 1024 * 16; /* in usecs */
+ struct timeval tv;
+ int waitret, tries;
+ int not_dead_yet;
+#ifdef HAS_OTHER_CHILD
+ other_child_rec *ocr, *nocr;
+#endif
+
+ for (tries = terminate ? 4 : 1; tries <= 9; ++tries) {
+ /* don't want to hold up progress any more than
+ * necessary, but we need to allow children a few moments to exit.
+ * Set delay with an exponential backoff.
+ */
+ tv.tv_sec = waittime / 1000000;
+ tv.tv_usec = waittime % 1000000;
+ waittime = waittime * 4;
+ ap_select(0, NULL, NULL, NULL, &tv);
+
+ /* now see who is done */
+ not_dead_yet = 0;
+ for (i = 0; i < max_daemons_limit; ++i) {
+ int pid = ap_scoreboard_image[i].pid;
+
+ if (pid == my_pid || pid == 0)
+ continue;
+
+ waitret = waitpid(pid, &status, WNOHANG);
+ if (waitret == pid || waitret == -1) {
+ ap_scoreboard_image[i].pid = 0;
+ continue;
+ }
+ ++not_dead_yet;
+ switch (tries) {
+ case 1: /* 16ms */
+ case 2: /* 82ms */
+ break;
+ case 3: /* 344ms */
+ case 4: /* 16ms */
+ case 5: /* 82ms */
+ case 6: /* 344ms */
+ case 7: /* 1.4sec */
+ /* ok, now it's being annoying */
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING,
+ server_conf,
+ "child process %d still did not exit, sending a SIGTERM",
+ pid);
+ kill(pid, SIGTERM);
+ break;
+ case 8: /* 6 sec */
+ /* die child scum */
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, server_conf,
+ "child process %d still did not exit, sending a SIGKILL",
+ pid);
+ kill(pid, SIGKILL);
+ break;
+ case 9: /* 14 sec */
+ /* gave it our best shot, but alas... If this really
+ * is a child we are trying to kill and it really hasn't
+ * exited, we will likely fail to bind to the port
+ * after the restart.
+ */
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, server_conf,
+ "could not make child process %d exit, "
+ "attempting to continue anyway", pid);
+ break;
+ }
+ }
+#ifdef HAS_OTHER_CHILD
+ for (ocr = other_children; ocr; ocr = nocr) {
+ nocr = ocr->next;
+ if (ocr->pid == -1)
+ continue;
+
+ waitret = waitpid(ocr->pid, &status, WNOHANG);
+ if (waitret == ocr->pid) {
+ ocr->pid = -1;
+ (*ocr->maintenance) (OC_REASON_DEATH, ocr->data, status);
+ }
+ else if (waitret == 0) {
+ (*ocr->maintenance) (OC_REASON_RESTART, ocr->data, -1);
+ ++not_dead_yet;
+ }
+ else if (waitret == -1) {
+ /* uh what the heck? they didn't call unregister? */
+ ocr->pid = -1;
+ (*ocr->maintenance) (OC_REASON_LOST, ocr->data, -1);
+ }
+ }
+#endif
+ if (!not_dead_yet) {
+ /* nothing left to wait for */
+ break;
+ }
+ }
+}
+
+/* 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.
+ */
+}
+
+static void just_die(int sig)
+{
+ clean_child_exit(0);
+}
+
+/*****************************************************************
+ * Connection structures and accounting...
+ */
+
+/* volatile just in case */
+static int volatile shutdown_pending;
+static int volatile restart_pending;
+static int volatile is_graceful;
+
+/*
+ * ap_start_shutdown() and ap_start_restart(), below, are a first stab at
+ * functions to initiate shutdown or restart without relying on signals.
+ * Previously this was initiated in sig_term() and restart() signal handlers,
+ * but we want to be able to start a shutdown/restart from other sources --
+ * e.g. on Win32, from the service manager. Now the service manager can
+ * call ap_start_shutdown() or ap_start_restart() as appropiate. Note that
+ * these functions can also be called by the child processes, since global
+ * variables are no longer used to pass on the required action to the parent.
+ *
+ * These should only be called from the parent process itself, since the
+ * parent process will use the shutdown_pending and restart_pending variables
+ * to determine whether to shutdown or restart. The child process should
+ * call signal_parent() directly to tell the parent to die -- this will
+ * cause neither of those variable to be set, which the parent will
+ * assume means something serious is wrong (which it will be, for the
+ * child to force an exit) and so do an exit anyway.
+ */
+
+void ap_start_shutdown(void)
+{
+ if (shutdown_pending == 1) {
+ /* Um, is this _probably_ not an error, if the user has
+ * tried to do a shutdown twice quickly, so we won't
+ * worry about reporting it.
+ */
+ return;
+ }
+ shutdown_pending = 1;
+}
+
+/* do a graceful restart if graceful == 1 */
+void ap_start_restart(int graceful)
+{
+
+ if (restart_pending == 1) {
+ /* Probably not an error - don't bother reporting it */
+ return;
+ }
+ restart_pending = 1;
+ is_graceful = graceful;
+}
+
+static void sig_term(int sig)
+{
+ ap_start_shutdown();
+}
+
+static void restart(int sig)
+{
+#ifndef WIN32
+ ap_start_restart(sig == SIGWINCH);
+#else
+ ap_start_restart(1);
+#endif
+}
+
+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 WINCH while we're busy processing one */
+ sigaddset(&sa.sa_mask, SIGHUP);
+ sigaddset(&sa.sa_mask, SIGWINCH);
+ sa.sa_handler = restart;
+ if (sigaction(SIGHUP, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "sigaction(SIGHUP)");
+ if (sigaction(SIGWINCH, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "sigaction(SIGWINCH)");
+#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 SIGWINCH
+ signal(SIGWINCH, restart);
+#endif /* SIGWINCH */
+#ifdef SIGPIPE
+ signal(SIGPIPE, SIG_IGN);
+#endif /* SIGPIPE */
+
+#endif
+}
+
+static int setup_listeners(pool *pconf, server_rec *s)
+{
+ ap_listen_rec *lr;
+ int num_listeners = 0;
+
+ if (ap_listen_open(pconf, s->port)) {
+ return 0;
+ }
+ for (lr = ap_listeners; lr; lr = lr->next) {
+ num_listeners++;
+ }
+ return num_listeners;
+}
+
+/*****************************************************************
+ * Here follows a long bunch of generic server bookkeeping stuff...
+ */
+
+#if defined(TCP_NODELAY) && !defined(MPE) && !defined(TPF)
+static void sock_disable_nagle(int s) /* ZZZ abstract */
+{
+ /* The Nagle algorithm says that we should delay sending partial
+ * packets in hopes of getting more data. We don't want to do
+ * this; we are not telnet. There are bad interactions between
+ * persistent connections and Nagle's algorithm that have very severe
+ * performance penalties. (Failing to disable Nagle is not much of a
+ * problem with simple HTTP.)
+ *
+ * In spite of these problems, failure here is not a shooting offense.
+ */
+ int just_say_no = 1;
+
+ if (setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (char *) &just_say_no,
+ sizeof(int)) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
+ "setsockopt: (TCP_NODELAY)");
+ }
+}
+
+#else
+#define sock_disable_nagle(s) /* NOOP */
+#endif
+
+int ap_graceful_stop_signalled(void)
+{
+ /* XXX - Does this really work? - Manoj */
+ return is_graceful;
+}
+
+/*****************************************************************
+ * Child process main loop.
+ */
+
+static void process_socket(pool *p, struct sockaddr *sa_client, int csd, int my_child_num, int my_thread_num)
+{
+ struct sockaddr sa_server; /* ZZZZ */
+ size_t len = sizeof(struct sockaddr);
+ BUFF *conn_io;
+ conn_rec *current_conn;
+ ap_iol *iol;
+
+ if (getsockname(csd, &sa_server, &len) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, server_conf, "getsockname");
+ close(csd);
+ return;
+ }
+
+ sock_disable_nagle(csd);
+
+ iol = unix_attach_socket(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", csd, FD_SETSIZE);
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, NULL,
+ "error attaching to socket");
+ }
+ close(csd);
+ return;
+ }
+
+ conn_io = ap_bcreate(p, B_RDWR);
+ ap_bpush_iol(conn_io, iol);
+
+ current_conn = ap_new_connection(p, server_conf, conn_io,
+ (const struct sockaddr_in *) sa_client,
+ (const struct sockaddr_in *) &sa_server,
+ my_child_num, my_thread_num);
+
+ ap_process_connection(current_conn);
+}
+
+static void * worker_thread(void * dummy)
+{
+ proc_info * ti = dummy;
+ int process_slot = ti->pid;
+ int thread_slot = ti->tid;
+ pool *tpool = ti->tpool;
+ struct sockaddr sa_client;
+ int csd = -1;
+ pool *ptrans; /* Pool for per-transaction stuff */
+ int sd = -1;
+ int srv;
+ int ret;
+ char pipe_read_char;
+ int curr_pollfd, last_pollfd = 0;
+ size_t len = sizeof(struct sockaddr);
+
+ free(ti);
+
+ ptrans = ap_make_sub_pool(tpool);
+
+ pthread_mutex_lock(&worker_thread_count_mutex);
+ worker_thread_count++;
+ pthread_mutex_unlock(&worker_thread_count_mutex);
+
+ /* TODO: Switch to a system where threads reuse the results from earlier
+ poll calls - manoj */
+ while (!workers_may_exit) {
+ workers_may_exit |= (ap_max_requests_per_child != 0) && (requests_this_child <= 0);
+ if (workers_may_exit) break;
+
+ SAFE_ACCEPT(intra_mutex_on(0));
+ if (workers_may_exit) {
+ SAFE_ACCEPT(intra_mutex_off(0));
+ break;
+ }
+ SAFE_ACCEPT(accept_mutex_on(0));
+ while (!workers_may_exit) {
+ srv = poll(listenfds, num_listenfds + 1, -1);
+ if (srv < 0) {
+ if (errno == EINTR) {
+ continue;
+ }
+
+ /* poll() will only return errors in catastrophic
+ * circumstances. Let's try exiting gracefully, for now. */
+ ap_log_error(APLOG_MARK, APLOG_ERR, (const server_rec *)
+ ap_get_server_conf(), "poll: (listen)");
+ workers_may_exit = 1;
+ }
+
+ if (workers_may_exit) break;
+
+ if (listenfds[0].revents & POLLIN) {
+ /* A process got a signal on the shutdown pipe. Check if we're
+ * the lucky process to die. */
+ pthread_mutex_lock(&pipe_of_death_mutex);
+ if (!workers_may_exit) {
+ ret = read(listenfds[0].fd, &pipe_read_char, 1);
+ if (ret == -1 && errno == EAGAIN) {
+ /* It lost the lottery. It must continue to suffer
+ * through a life of servitude. */
+ pthread_mutex_unlock(&pipe_of_death_mutex);
+ continue;
+ }
+ else {
+ /* It won the lottery (or something else is very
+ * wrong). Embrace death with open arms. */
+ workers_may_exit = 1;
+ pthread_mutex_unlock(&pipe_of_death_mutex);
+ break;
+ }
+ }
+ pthread_mutex_unlock(&pipe_of_death_mutex);
+ }
+
+ if (num_listenfds == 1) {
+ sd = ap_listeners->fd;
+ goto got_fd;
+ }
+ else {
+ /* find a listener */
+ curr_pollfd = last_pollfd;
+ do {
+ curr_pollfd++;
+ if (curr_pollfd > num_listenfds) {
+ curr_pollfd = 1;
+ }
+ /* XXX: Should we check for POLLERR? */
+ if (listenfds[curr_pollfd].revents & POLLIN) {
+ last_pollfd = curr_pollfd;
+ sd = listenfds[curr_pollfd].fd;
+ goto got_fd;
+ }
+ } while (curr_pollfd != last_pollfd);
+ }
+ }
+ got_fd:
+ SAFE_ACCEPT(accept_mutex_off(0));
+ SAFE_ACCEPT(intra_mutex_off(0));
+ if (workers_may_exit) break;
+ csd = ap_accept(sd, &sa_client, &len);
+ process_socket(ptrans, &sa_client, csd, process_slot, thread_slot);
+ ap_clear_pool(ptrans);
+ requests_this_child--;
+ }
+
+ ap_destroy_pool(tpool);
+ pthread_mutex_lock(&worker_thread_count_mutex);
+ worker_thread_count--;
+ if (worker_thread_count == 0) {
+ /* All the threads have exited, now finish the shutdown process
+ * by signalling the sigwait thread */
+ kill(my_pid, SIGTERM);
+ }
+ pthread_mutex_unlock(&worker_thread_count_mutex);
+
+ return NULL;
+}
+
+static void child_main(int child_num_arg)
+{
+ sigset_t sig_mask;
+ int signal_received;
+ pthread_t thread;
+ pthread_attr_t thread_attr;
+ int i;
+ int my_child_num = child_num_arg;
+ proc_info *my_info = NULL;
+ ap_listen_rec *lr;
+
+ my_pid = getpid();
+ pchild = ap_make_sub_pool(pconf);
+
+ /*stuff to do before we switch id's, so we have permissions.*/
+
+ SAFE_ACCEPT(intra_mutex_init(pchild, 1));
+ SAFE_ACCEPT(accept_mutex_child_init(pchild));
+
+ if (unixd_setup_child()) {
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ ap_child_init_hook(pchild, server_conf);
+
+ /*done with init critical section */
+
+ /* All threads should mask signals out, accoring to sigwait(2) man page */
+ sigemptyset(&sig_mask);
+
+ if (pthread_sigmask(SIG_SETMASK, &sig_mask, NULL) != 0) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, server_conf, "pthread_sigmask");
+ }
+
+ requests_this_child = ap_max_requests_per_child;
+
+ /* Set up the pollfd array */
+ listenfds = ap_palloc(pchild, sizeof(struct pollfd) * (num_listenfds + 1));
+ listenfds[0].fd = pipe_of_death[0];
+ listenfds[0].events = POLLIN;
+ listenfds[0].revents = 0;
+ for (lr = ap_listeners, i = 1; i <= num_listenfds; lr = lr->next, ++i) {
+ listenfds[i].fd = lr->fd;
+ listenfds[i].events = POLLIN; /* should we add POLLPRI ?*/
+ listenfds[i].revents = 0;
+ }
+
+ /* Setup worker threads */
+
+ worker_thread_count = 0;
+ pthread_mutex_init(&worker_thread_count_mutex, NULL);
+ pthread_mutex_init(&pipe_of_death_mutex, NULL);
+ pthread_attr_init(&thread_attr);
+ pthread_attr_setdetachstate(&thread_attr, PTHREAD_CREATE_DETACHED);
+ for (i=0; i < ap_threads_per_child; i++) {
+
+ my_info = (proc_info *)malloc(sizeof(proc_info));
+ if (my_info == NULL) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, server_conf,
+ "malloc: out of memory");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+ my_info->pid = my_child_num;
+ my_info->tid = i;
+ my_info->sd = 0;
+ my_info->tpool = ap_make_sub_pool(pchild);
+
+ /* We are creating threads right now */
+ if (pthread_create(&thread, &thread_attr, worker_thread, my_info)) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, server_conf,
+ "pthread_create: unable to create worker thread");
+ /* In case system resources are maxxed out, we don't want
+ Apache running away with the CPU trying to fork over and
+ over and over again if we exit. */
+ sleep(10);
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ /* We let each thread update it's own scoreboard entry. This is done
+ * because it let's us deal with tid better.
+ */
+ }
+
+ pthread_attr_destroy(&thread_attr);
+
+ /* This thread will be the one responsible for handling signals */
+ sigemptyset(&sig_mask);
+ sigaddset(&sig_mask, SIGTERM);
+ sigaddset(&sig_mask, SIGINT);
+ sigwait(&sig_mask, &signal_received);
+ switch (signal_received) {
+ case SIGTERM:
+ case SIGINT:
+ just_die(signal_received);
+ break;
+ default:
+ ap_log_error(APLOG_MARK, APLOG_ALERT, server_conf,
+ "received impossible signal: %d", signal_received);
+ just_die(SIGTERM);
+ }
+}
+
+static int make_child(server_rec *s, int slot, time_t now) /* ZZZ */
+{
+ int pid;
+
+ (void) ap_update_child_status(slot, SERVER_ALIVE);
+
+ if (slot + 1 > max_daemons_limit) {
+ max_daemons_limit = slot + 1;
+ }
+
+ if (one_process) {
+ set_signals();
+ ap_scoreboard_image[slot].pid = getpid();
+ child_main(slot);
+ }
+
+ if ((pid = fork()) == -1) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, s, "fork: Unable to fork new process");
+ /* In case system resources are maxxed out, we don't want
+ Apache running away with the CPU trying to fork over and
+ over and over again. */
+ sleep(10);
+
+ return -1;
+ }
+
+ if (!pid) {
+#ifdef AIX_BIND_PROCESSOR
+ /* By default, AIX binds to a single processor. This bit unbinds
+ children which will then bind to another CPU.
+ */
+#include <sys/processor.h>
+ int status = bindprocessor(BINDPROCESS, (int)getpid(),
+ PROCESSOR_CLASS_ANY);
+ if (status != OK)
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, server_conf,
+ "processor unbind failed %d", status);
+#endif
+
+ RAISE_SIGSTOP(MAKE_CHILD);
+
+ /* XXX - For an unthreaded server, a signal handler will be necessary
+ signal(SIGTERM, just_die);
+ */
+ child_main(slot);
+
+ return 0;
+ }
+ /* else */
+ ap_scoreboard_image[slot].pid = pid;
+ return 0;
+}
+
+/* start up a bunch of children */
+static void startup_children(int number_to_start)
+{
+ int i;
+
+ for (i = 0; number_to_start && i < ap_num_daemons; ++i) {
+ if (ap_scoreboard_image[i].pid != 0) {
+ continue;
+ }
+ if (make_child(server_conf, i, 0) < 0) {
+ break;
+ }
+ --number_to_start;
+ }
+}
+
+
+/*
+ * spawn_rate is the number of children that will be spawned on the
+ * next maintenance cycle if there aren't enough servers. It is
+ * doubled up to MAX_SPAWN_RATE, and reset only when a cycle goes by
+ * without the need to spawn.
+ */
+static int spawn_rate = 1;
+#ifndef MAX_SPAWN_RATE
+#define MAX_SPAWN_RATE (32)
+#endif
+static int hold_off_on_exponential_spawning;
+
+static void perform_child_maintenance(void)
+{
+ int i;
+ time_t now = 0;
+ int free_length;
+ int free_slots[MAX_SPAWN_RATE];
+ int last_non_dead = -1;
+
+ /* initialize the free_list */
+ free_length = 0;
+
+ ap_check_signals();
+
+ for (i = 0; i < ap_num_daemons; ++i) {
+ unsigned char status = ap_scoreboard_image[i].status;
+
+ if (status == SERVER_DEAD) {
+ free_slots[free_length] = i;
+ ++free_length;
+ } else {
+ last_non_dead = i;
+ }
+
+ if (free_length >= spawn_rate) {
+ break;
+ }
+ }
+ max_daemons_limit = last_non_dead + 1;
+
+ if (free_length > 0) {
+ 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 (spawn_rate < MAX_SPAWN_RATE) {
+ spawn_rate *= 2;
+ }
+ }
+ else {
+ spawn_rate = 1;
+ }
+}
+
+static void server_main_loop(int remaining_children_to_start)
+{
+ int child_slot;
+ ap_wait_t status;
+ int pid;
+
+ while (!restart_pending && !shutdown_pending) {
+ pid = wait_or_timeout(&status);
+
+ if (pid >= 0) {
+ child_slot = find_child_by_pid(pid);
+ if (child_slot >= 0) {
+ ap_update_child_status(child_slot, SERVER_DEAD);
+
+ if (remaining_children_to_start
+ && child_slot < ap_num_daemons) {
+ /* we're still doing a 1-for-1 replacement of dead
+ * children with new children
+ */
+ /* ZZZ abstract out for AP funcs. */
+ make_child(server_conf, child_slot, time(NULL));
+ --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_child_maintenance();
+ }
+}
+
+int ap_mpm_run(pool *_pconf, pool *plog, server_rec *s)
+{
+ int remaining_children_to_start;
+
+ pconf = _pconf;
+ server_conf = s;
+ if (pipe(pipe_of_death) == -1) {
+ ap_log_error(APLOG_MARK, APLOG_ERR,
+ (const server_rec*) server_conf,
+ "pipe: (pipe_of_death)");
+ exit(1);
+ }
+ ap_note_cleanups_for_fd(pconf, pipe_of_death[0]);
+ ap_note_cleanups_for_fd(pconf, pipe_of_death[1]);
+ if (fcntl(pipe_of_death[0], F_SETFD, O_NONBLOCK) == -1) {
+ ap_log_error(APLOG_MARK, APLOG_ERR,
+ (const server_rec*) server_conf,
+ "fcntl: O_NONBLOCKing (pipe_of_death)");
+ exit(1);
+ }
+ server_conf = s;
+ if ((num_listenfds = setup_listeners(pconf, server_conf)) < 1) {
+ /* XXX: hey, what's the right way for the mpm to indicate a fatal error? */
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ALERT, s,
+ "no listening sockets available, shutting down");
+ return 1;
+ }
+ ap_clear_pool(plog);
+ ap_open_logs(server_conf, plog);
+ ap_log_pid(pconf, ap_pid_fname);
+ SAFE_ACCEPT(accept_mutex_init(pconf, 1));
+ if (!is_graceful) {
+ reinit_scoreboard(pconf);
+ }
+
+ set_signals();
+
+ /* 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 SIGWINCH). 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_num_daemons;
+ 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;
+
+ server_main_loop(remaining_children_to_start);
+
+ 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");
+ }
+ 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_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);
+
+ if (one_process) {
+ /* not worth thinking about */
+ return 1;
+ }
+
+ if (is_graceful) {
+ int i;
+ char char_of_death = '!';
+
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, server_conf,
+ "SIGWINCH received. Doing graceful restart");
+
+ /* This is mostly for debugging... so that we know what is still
+ * gracefully dealing with existing request.
+ */
+
+ for (i = 0; i < ap_num_daemons; ++i) {
+ if (ap_scoreboard_image[i].status != SERVER_DEAD) {
+ ap_scoreboard_image[i].status = SERVER_DYING;
+ }
+ }
+ /* kill off the idle ones */
+ for (i = 0; i < ap_num_daemons; ++i) {
+ if (write(pipe_of_death[1], &char_of_death, 1) == -1) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "write pipe_of_death");
+ }
+ }
+ }
+ else {
+ /* Kill 'em all. Since the child acts the same on the parents SIGTERM
+ * and a SIGHUP, we may as well use the same signal, because some user
+ * pthreads are stealing signals from us left and right.
+ */
+ if (ap_killpg(getpgrp(), SIGTERM) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "killpg SIGTERM");
+ }
+ reclaim_child_processes(1); /* Start with SIGTERM */
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, server_conf,
+ "SIGHUP received. Attempting to restart");
+ }
+ if (!is_graceful) {
+ ap_restart_time = time(NULL); /* ZZZZZ */
+ }
+ return 0;
+}
+
+static void dexter_pre_command_line(pool *pcommands)
+{
+ INIT_SIGLIST()
+ one_process = 0;
+}
+
+static void dexter_pre_config(pool *pconf, pool *plog, pool *ptemp)
+{
+ static int restart_num = 0;
+
+ one_process = ap_exists_config_define("ONE_PROCESS");
+
+ /* sigh, want this only the second time around */
+ if (restart_num++ == 1) {
+ is_graceful = 0;
+
+ if (!one_process) {
+ unixd_detach();
+ }
+
+ my_pid = getpid();
+ }
+
+ unixd_pre_config();
+ ap_listen_pre_config();
+ ap_num_daemons = HARD_SERVER_LIMIT;
+ ap_threads_per_child = DEFAULT_THREADS_PER_CHILD;
+ ap_pid_fname = DEFAULT_PIDLOG;
+ ap_lock_fname = DEFAULT_LOCKFILE;
+ 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_lockfile(cmd_parms *cmd, void *dummy, char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_lock_fname = arg;
+ return NULL;
+}
+static const char *set_num_daemons (cmd_parms *cmd, void *dummy, char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_num_daemons = atoi(arg);
+ if (ap_num_daemons > HARD_SERVER_LIMIT) {
+ fprintf(stderr, "WARNING: MaxClients of %d exceeds compile time limit "
+ "of %d servers,\n", ap_num_daemons, 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_num_daemons = HARD_SERVER_LIMIT;
+ }
+ else if (ap_num_daemons < 1) {
+ fprintf(stderr, "WARNING: Require MaxClients > 0, setting to 1\n");
+ ap_num_daemons = 1;
+ }
+ return NULL;
+}
+
+static const char *set_threads_per_child (cmd_parms *cmd, void *dummy, char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_threads_per_child = atoi(arg);
+ if (ap_threads_per_child > HARD_THREAD_LIMIT) {
+ fprintf(stderr, "WARNING: ThreadsPerChild of %d exceeds compile time"
+ "limit of %d threads,\n", ap_threads_per_child,
+ HARD_THREAD_LIMIT);
+ fprintf(stderr, " lowering ThreadsPerChild to %d. To increase, please"
+ "see the\n", HARD_THREAD_LIMIT);
+ fprintf(stderr, " HARD_THREAD_LIMIT define in src/include/httpd.h.\n");
+ }
+ else if (ap_threads_per_child < 1) {
+ fprintf(stderr, "WARNING: Require ThreadsPerChild > 0, setting to 1\n");
+ ap_threads_per_child = 1;
+ }
+ return NULL;
+}
+
+static const char *set_max_requests(cmd_parms *cmd, void *dummy, char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ 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 {
+ pthread_mutex_t mutex;
+};
+
+API_EXPORT(ap_thread_mutex *) ap_thread_mutex_new(void)
+{
+ ap_thread_mutex *mtx;
+
+ mtx = malloc(sizeof(ap_thread_mutex));
+ pthread_mutex_init(&(mtx->mutex), NULL);
+ return mtx;
+}
+
+API_EXPORT(void) ap_thread_mutex_lock(ap_thread_mutex *mtx)
+{
+ /* Ignoring error conditions here. :( */
+ pthread_mutex_lock(&(mtx->mutex));
+}
+
+API_EXPORT(void) ap_thread_mutex_unlock(ap_thread_mutex *mtx)
+{
+ /* Here too. */
+ pthread_mutex_unlock(&(mtx->mutex));
+}
+
+API_EXPORT(void) ap_thread_mutex_destroy(ap_thread_mutex *mtx)
+{
+ /* Here too. */
+ pthread_mutex_destroy(&(mtx->mutex));
+ free(mtx);
+}
+
+
+static const command_rec dexter_cmds[] = {
+UNIX_DAEMON_COMMANDS
+LISTEN_COMMANDS
+{ "PidFile", set_pidfile, NULL, RSRC_CONF, TAKE1,
+ "A file for logging the server process ID"},
+{ "LockFile", set_lockfile, NULL, RSRC_CONF, TAKE1,
+ "The lockfile used when Apache needs to lock the accept() call"},
+{ "NumServers", set_num_daemons, NULL, RSRC_CONF, TAKE1,
+ "Number of children alive at the same time" },
+{ "ThreadsPerChild", set_threads_per_child, NULL, RSRC_CONF, TAKE1,
+ "Number of threads each child creates" },
+{ "MaxRequestsPerChild", set_max_requests, NULL, RSRC_CONF, TAKE1,
+ "Maximum number of requests a particular child serves before dying." },
+{ "CoreDumpDirectory", set_coredumpdir, NULL, RSRC_CONF, TAKE1,
+ "The location of the directory Apache changes to before dumping core" },
+{ NULL }
+};
+
+module MODULE_VAR_EXPORT mpm_dexter_module = {
+ STANDARD20_MODULE_STUFF,
+ dexter_pre_command_line, /* pre_command_line */
+ dexter_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 */
+ dexter_cmds, /* command table */
+ NULL, /* handlers */
+ NULL, /* check auth */
+ NULL, /* check access */
+ NULL, /* type_checker */
+ NULL, /* pre-run fixups */
+ NULL /* register hooks */
+};
+
+/* force Expat to be linked into the server executable */
+#if defined(USE_EXPAT) && !defined(SHARED_CORE_BOOTSTRAP)
+#include "xmlparse.h"
+const XML_LChar *suck_in_expat(void);
+const XML_LChar *suck_in_expat(void)
+{
+ return XML_ErrorString(XML_ERROR_NONE);
+}
+#endif /* USE_EXPAT */
projects / thirdparty / apache / httpd.git / commitdiff
