--- /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 "scoreboard.h"
+
+#include "http_accept.h"
+#include <netinet/tcp.h>
+#include "pthread.h"
+
+/*
+ * Actual definitions of config globals
+ */
+
+static int ap_threads_per_child=0; /* Worker threads per child */
+static int ap_acceptors_per_child=0; /* Accept threads per child */
+static int ap_max_requests_per_child=0;
+static char *ap_pid_fname=NULL;
+static char *ap_scoreboard_fname=NULL;
+static char *ap_lock_fname;
+static struct in_addr ap_bind_address; /* ZZZZZ Abstract out the in_addr */
+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_listenbacklog;
+API_VAR_EXPORT int ap_extended_status = 0;
+
+
+/*
+ * The max child slot ever assigned, preserved across restarts. Necessary
+ * to deal with MaxClients changes across SIGWINCH restarts. We use this
+ * value to optimize routines that have to scan the entire scoreboard.
+ */
+static int max_daemons_limit = -1;
+
+/*
+ * During config time, listeners is treated as a NULL-terminated list.
+ * ;child_main previously would start at the beginning of the list each time
+ * through the loop, so a socket early on in the list could easily starve out
+ * sockets later on in the list. The solution is to start at the listener
+ * after the last one processed. But to do that fast/easily in child_main it's
+ * way more convenient for listeners to be a ring that loops back on itself.
+ * The routine setup_listeners() is called after config time to both open up
+ * the sockets and to turn the NULL-terminated list into a ring that loops back
+ * on itself.
+ *
+ * head_listener is used by each child to keep track of what they consider
+ * to be the "start" of the ring. It is also set by make_child to ensure
+ * that new children also don't starve any sockets.
+ *
+ * Note that listeners != NULL is ensured by read_config().
+ */
+listen_rec *ap_listeners;
+
+static char ap_coredump_dir[MAX_STRING_LEN];
+
+int ap_pipe_of_death[2];
+
+/* *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);
+}
+
+API_EXPORT(int) ap_get_max_daemons(void)
+{
+ return max_daemons_limit;
+}
+
+/* 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
+
+ ap_sync_scoreboard_image();
+
+ 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->parent[i].pid;
+
+ if (pid == my_pid || pid == 0)
+ continue;
+
+ waitret = waitpid(pid, &status, WNOHANG);
+ if (waitret == pid || waitret == -1) {
+ ap_scoreboard_image->parent[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_generation_t volatile ap_my_generation;
+
+/*
+ * 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
+}
+
+/*****************************************************************
+ * Here follows a long bunch of generic server bookkeeping stuff...
+ */
+
+/*****************************************************************
+ * Connection structures and accounting...
+ */
+
+
+static conn_rec *new_connection(pool *p, server_rec *server, BUFF *inout,
+ const struct sockaddr_in *remaddr, /* ZZZ */
+ const struct sockaddr_in *saddr, /* ZZZ */
+ int child_num, int thread_num)
+{
+ conn_rec *conn = (conn_rec *) ap_pcalloc(p, sizeof(conn_rec));
+
+ /* Got a connection structure, so initialize what fields we can
+ * (the rest are zeroed out by pcalloc).
+ */
+
+ conn->child_num = child_num;
+ conn->thread_num = thread_num;
+
+ conn->pool = p;
+ conn->local_addr = *saddr;
+ conn->base_server = server;
+ conn->client = inout;
+
+ conn->remote_addr = *remaddr;
+ conn->remote_ip = ap_pstrdup(conn->pool,
+ inet_ntoa(conn->remote_addr.sin_addr));
+
+ return conn;
+}
+
+#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
+
+
+static int make_sock(pool *p, const struct sockaddr_in *server)
+ /* abstract sockaddr_in */
+{
+ int s;
+ int one = 1;
+ char addr[512];
+
+ if (server->sin_addr.s_addr != htonl(INADDR_ANY))
+ ap_snprintf(addr, sizeof(addr), "address %s port %d",
+ inet_ntoa(server->sin_addr), ntohs(server->sin_port));
+ else
+ ap_snprintf(addr, sizeof(addr), "port %d", ntohs(server->sin_port));
+
+ /* note that because we're about to slack we don't use psocket */
+ if ((s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, server_conf,
+ "make_sock: failed to get a socket for %s", addr);
+ printf("make_sock: failed to get socket for %s\n", addr);
+ exit(1);
+ }
+
+ /* Solaris (probably versions 2.4, 2.5, and 2.5.1 with various levels
+ * of tcp patches) has some really weird bugs where if you dup the
+ * socket now it breaks things across SIGHUP restarts. It'll either
+ * be unable to bind, or it won't respond.
+ */
+#if defined (SOLARIS2) && SOLARIS2 < 260
+#define WORKAROUND_SOLARIS_BUG
+#endif
+
+ /* PR#1282 Unixware 1.x appears to have the same problem as solaris */
+#if defined (UW) && UW < 200
+#define WORKAROUND_SOLARIS_BUG
+#endif
+
+ /* PR#1973 NCR SVR4 systems appear to have the same problem */
+#if defined (MPRAS)
+#define WORKAROUND_SOLARIS_BUG
+#endif
+
+#ifndef WORKAROUND_SOLARIS_BUG
+ s = ap_slack(s, AP_SLACK_HIGH);
+
+ ap_note_cleanups_for_socket(p, s); /* arrange to close on exec or restart */
+#endif
+
+#ifndef MPE
+/* MPE does not support SO_REUSEADDR and SO_KEEPALIVE */
+#ifndef _OSD_POSIX
+ if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *) &one, sizeof(int)) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, server_conf,
+ "make_sock: for %s, setsockopt: (SO_REUSEADDR)", addr);
+ printf("make_sock: failed to setsockopt for %s\n", addr);
+ close(s);
+ return 0;
+ }
+#endif /*_OSD_POSIX*/
+ one = 1;
+#ifndef BEOS
+/* BeOS does not support SO_KEEPALIVE */
+ if (setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (char *) &one, sizeof(int)) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, server_conf,
+ "make_sock: for %s, setsockopt: (SO_KEEPALIVE)", addr);
+ close(s);
+ return 0;
+ }
+#endif
+#endif
+
+ sock_disable_nagle(s);
+/* sock_enable_linger(s); XXX - Need to reenable? - Manoj */
+
+
+
+ /*
+ * To send data over high bandwidth-delay connections at full
+ * speed we must force the TCP window to open wide enough to keep the
+ * pipe full. The default window size on many systems
+ * is only 4kB. Cross-country WAN connections of 100ms
+ * at 1Mb/s are not impossible for well connected sites.
+ * If we assume 100ms cross-country latency,
+ * a 4kB buffer limits throughput to 40kB/s.
+ *
+ * To avoid this problem I've added the SendBufferSize directive
+ * to allow the web master to configure send buffer size.
+ *
+ * The trade-off of larger buffers is that more kernel memory
+ * is consumed. YMMV, know your customers and your network!
+ *
+ * -John Heidemann <johnh@isi.edu> 25-Oct-96
+ *
+ * If no size is specified, use the kernel default.
+ */
+#ifndef BEOS /* BeOS does not support SO_SNDBUF */
+ if (server_conf->send_buffer_size) {
+ if (setsockopt(s, SOL_SOCKET, SO_SNDBUF,
+ (char *) &server_conf->send_buffer_size, sizeof(int)) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
+ "make_sock: failed to set SendBufferSize for %s, "
+ "using default", addr);
+ /* not a fatal error */
+ }
+ }
+#endif
+
+#ifdef MPE
+/* MPE requires CAP=PM and GETPRIVMODE to bind to ports less than 1024 */
+ if (ntohs(server->sin_port) < 1024)
+ GETPRIVMODE();
+#endif
+ if (bind(s, (struct sockaddr *) server, sizeof(struct sockaddr_in)) == -1) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, server_conf,
+ "make_sock: could not bind to %s", addr);
+#ifdef MPE
+ if (ntohs(server->sin_port) < 1024)
+ GETUSERMODE();
+#endif
+ close(s);
+ exit(1);
+ }
+#ifdef MPE
+ if (ntohs(server->sin_port) < 1024)
+ GETUSERMODE();
+#endif
+
+ if (listen(s, ap_listenbacklog) == -1) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
+ "make_sock: unable to listen for connections on %s", addr);
+ close(s);
+ exit(1);
+ }
+
+#ifdef WORKAROUND_SOLARIS_BUG
+ s = ap_slack(s, AP_SLACK_HIGH);
+
+ ap_note_cleanups_for_socket(p, s); /* arrange to close on exec or restart */
+#endif
+
+#ifdef CHECK_FD_SETSIZE
+ /* protect various fd_sets */
+ if (s >= FD_SETSIZE) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, NULL,
+ "make_sock: problem listening on %s, filedescriptor (%u) "
+ "larger than FD_SETSIZE (%u) "
+ "found, you probably need to rebuild Apache with a "
+ "larger FD_SETSIZE", addr, s, FD_SETSIZE);
+ close(s);
+ return 0;
+ }
+#endif
+
+ return s;
+}
+
+
+/*
+ * During a restart we keep track of the old listeners here, so that we
+ * can re-use the sockets. We have to do this because we won't be able
+ * to re-open the sockets ("Address already in use").
+ *
+ * Unlike the listeners ring, old_listeners is a NULL terminated list.
+ *
+ * copy_listeners() makes the copy, find_listener() finds an old listener
+ * and close_unused_listener() cleans up whatever wasn't used.
+ */
+static listen_rec *old_listeners;
+
+/* unfortunately copy_listeners may be called before listeners is a ring */
+static void copy_listeners(pool *p)
+{
+ listen_rec *lr;
+
+ ap_assert(old_listeners == NULL);
+ if (ap_listeners == NULL) {
+ return;
+ }
+ lr = ap_listeners;
+ do {
+ listen_rec *nr = malloc(sizeof *nr);
+ if (nr == NULL) {
+ fprintf(stderr, "Ouch! malloc failed in copy_listeners()\n");
+ exit(1);
+ }
+ *nr = *lr;
+ ap_kill_cleanups_for_socket(p, nr->fd);
+ nr->next = old_listeners;
+ old_listeners = nr;
+ lr = lr->next;
+ } while (lr && lr != ap_listeners);
+}
+
+
+static int find_listener(listen_rec *lr)
+{
+ listen_rec *or;
+ for (or = old_listeners; or; or = or->next) {
+ if (!memcmp(&or->local_addr, &lr->local_addr, sizeof(or->local_addr))) {
+ or->used = 1;
+ return or->fd;
+ }
+ }
+ return -1;
+}
+
+
+static void close_unused_listeners(void)
+{
+ listen_rec *or, *next;
+
+ for (or = old_listeners; or; or = next) {
+ next = or->next;
+ if (!or->used)
+ closesocket(or->fd);
+ free(or);
+ }
+ old_listeners = NULL;
+}
+
+
+/* open sockets, and turn the listeners list into a singly linked ring */
+static int setup_listeners(pool *p)
+{
+ listen_rec *lr;
+ int fd;
+ int listener_count = 0;
+
+ lr = ap_listeners;
+ for (;;) {
+ fd = find_listener(lr);
+ if (fd < 0) {
+ fd = make_sock(p, &lr->local_addr);
+ }
+ else {
+ ap_note_cleanups_for_socket(p, fd);
+ }
+ if (fd >= 0) {
+ ++listener_count;
+ }
+ lr->fd = fd;
+ if (lr->next == NULL)
+ break;
+ lr = lr->next;
+ }
+ /* turn the list into a ring */
+ /*
+ lr->next = ap_listeners;
+ head_listener = ap_listeners;
+ */
+
+ close_unused_listeners();
+
+#ifdef NO_SERIALIZED_ACCEPT
+ /* warn them about the starvation problem if they're using multiple
+ * sockets
+ */
+ if (ap_listeners->next != ap_listeners) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_CRIT, NULL,
+ "You cannot use multiple Listens safely on your system, "
+ "proceeding anyway. See src/PORTING, search for "
+ "SERIALIZED_ACCEPT.");
+ }
+#endif
+ return listener_count;
+}
+
+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_note_cleanups_for_fd(p, csd);
+
+ /* ZZZ change to AP func */
+ if (getsockname(csd, &sa_server, &len) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, server_conf, "getsockname");
+ return;
+ }
+ (void) ap_update_child_status(my_child_num, my_thread_num,
+ SERVER_BUSY_READ, (request_rec *) NULL);
+ conn_io = ap_bcreate(p, B_RDWR | B_SOCKET);
+ ap_bpushfd(conn_io, csd);
+
+ current_conn = 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;
+ pool *ptrans; /* Pool for per-transaction stuff */
+
+ 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);
+
+ while (1) {
+ (void) ap_update_child_status(process_slot, thread_slot, SERVER_READY,
+ (request_rec *) NULL);
+ csd = get_connection(&sa_client);
+ if (csd < 0) {
+ break;
+ }
+ process_socket(ptrans, &sa_client, csd, process_slot, thread_slot);
+ ap_clear_pool(ptrans);
+ }
+
+ ap_destroy_pool(tpool);
+ ap_update_child_status(process_slot, thread_slot, SERVER_DEAD,
+ (request_rec *) NULL);
+ 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;
+
+ my_pid = getpid();
+ pchild = ap_make_sub_pool(pconf);
+
+ /*stuff to do before we switch id's, so we have permissions.*/
+ reopen_scoreboard(pchild);
+
+ if (unixd_setup_child()) {
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ accept_child_init(pchild, ap_threads_per_child);
+ 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");
+ }
+
+ /* Setup worker threads */
+
+ worker_thread_count = 0;
+ pthread_mutex_init(&worker_thread_count_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 */
+ (void) ap_update_child_status(my_child_num, i, SERVER_STARTING,
+ (request_rec *) NULL);
+ 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);
+ start_accepting_connections(my_child_num);
+
+ /* 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;
+
+ if (ap_acceptors_per_child + ap_threads_per_child > HARD_THREAD_LIMIT) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, s,
+ "Worker threads plus acceptor threads is greater than HARD_THREAD_LIMIT, please correct");
+ exit(-1);
+ }
+
+
+ if (slot + 1 > max_daemons_limit) {
+ max_daemons_limit = slot + 1;
+ }
+
+ if (one_process) {
+ set_signals();
+ ap_scoreboard_image->parent[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->parent[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_daemons_limit; ++i) {
+ if (ap_scoreboard_image->parent[i].pid != 0) {
+ continue;
+ }
+ if (make_child(server_conf, i, 0) < 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, j;
+ int idle_count_ceil, idle_count_floor, idle_thread_count;
+ thread_score *ss;
+ time_t now = 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;
+
+ idle_count_ceil = 0;
+ idle_count_floor = 0;
+ idle_thread_count = 0;
+ last_non_dead = -1;
+ total_non_dead = 0;
+
+ ap_check_signals();
+
+ ap_sync_scoreboard_image();
+ for (i = 0; i < ap_daemons_limit; ++i) {
+ /* Initialization to satisfy the compiler. It doesn't know
+ * that ap_threads_per_child is always > 0 */
+ int status = SERVER_DEAD;
+ int any_dying_threads = 0;
+ int all_dead_threads = 1;
+ int idle_thread_addition = 0;
+
+ if (i >= max_daemons_limit && free_length == idle_spawn_rate)
+ break;
+ for (j = 0; j < ap_threads_per_child; j++) {
+ ss = &ap_scoreboard_image->servers[i][j];
+ status = ss->status;
+
+ any_dying_threads = any_dying_threads || (status == SERVER_DEAD)
+ || (status == SERVER_GRACEFUL);
+ all_dead_threads = all_dead_threads && (status == SERVER_DEAD);
+
+ /* 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_thread_addition;
+ }
+ }
+ if (all_dead_threads && free_length < idle_spawn_rate) {
+ free_slots[free_length] = i;
+ ++free_length;
+ }
+ if (!all_dead_threads) {
+ last_non_dead = i;
+ }
+ if (!any_dying_threads) {
+ ++total_non_dead;
+ idle_thread_count += idle_thread_addition;
+ }
+ }
+ max_daemons_limit = last_non_dead + 1;
+ idle_count_floor = idle_thread_count / ap_threads_per_child;
+ idle_count_ceil = idle_count_floor;
+ if (idle_thread_count % ap_threads_per_child) {
+ idle_count_ceil++;
+ }
+
+ if (idle_count_ceil > ap_daemons_max_free) {
+ /* Kill off one child */
+ char char_of_death = '!';
+ if (write(ap_pipe_of_death[1], &char_of_death, 1) == -1) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "write ap_pipe_of_death");
+ }
+ idle_spawn_rate = 1;
+ }
+ else if (idle_count_floor < 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 {
+ /* ZZZZ */
+
+ 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_floor, 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 server_main_loop(int remaining_children_to_start)
+{
+ int child_slot;
+ ap_wait_t status;
+ int pid;
+ int i;
+
+ while (!restart_pending && !shutdown_pending) {
+ pid = wait_or_timeout(&status);
+
+ if (pid >= 0) {
+ child_slot = find_child_by_pid(pid);
+ if (child_slot >= 0) {
+ for (i = 0; i < ap_threads_per_child + ap_acceptors_per_child; i++)
+ ap_update_child_status(child_slot, i, 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
+ */
+ /* 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_idle_server_maintenance();
+ }
+}
+
+int ap_mpm_run(pool *_pconf, pool *plog, server_rec *s)
+{
+ int remaining_children_to_start;
+ int listener_count;
+
+ pconf = _pconf;
+ server_conf = s;
+ if (pipe(ap_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, ap_pipe_of_death[0]);
+ ap_note_cleanups_for_fd(pconf, ap_pipe_of_death[1]);
+ if (fcntl(ap_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;
+ listener_count = setup_listeners(pconf);
+ ap_clear_pool(plog);
+ ap_open_logs(server_conf, plog);
+ ap_log_pid(pconf, ap_pid_fname);
+ accept_parent_init(pconf, listener_count);
+ if (!is_graceful) {
+ reinit_scoreboard(pconf);
+ }
+
+ set_signals();
+ /* set up get_socket */
+
+ 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 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_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;
+
+ 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;
+ }
+
+ /* 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.
+ */
+ ++ap_my_generation;
+ ap_scoreboard_image->global.running_generation = ap_my_generation;
+ update_scoreboard_global();
+
+ if (is_graceful) {
+ int i, j;
+ char char_of_death = '!';
+
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, server_conf,
+ "SIGWINCH received. Doing graceful restart");
+
+ /* kill off the idle ones */
+ for (i = 0; i < ap_daemons_limit; ++i) {
+ if (write(ap_pipe_of_death[1], &char_of_death, 1) == -1) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf, "write ap_pipe_of_death");
+ }
+ }
+
+ /* This is mostly for debugging... so that we know what is still
+ * gracefully dealing with existing request.
+ */
+
+ for (i = 0; i < ap_daemons_limit; ++i) {
+ for (j = 0; j < ap_threads_per_child + ap_acceptors_per_child;
+ j++) {
+ if (ap_scoreboard_image->servers[i][j].status != SERVER_DEAD) {
+ ap_scoreboard_image->servers[i][j].status = SERVER_GRACEFUL;
+ }
+ }
+ }
+ }
+ 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");
+ }
+ copy_listeners(pconf);
+ if (!is_graceful) {
+ ap_restart_time = time(NULL); /* ZZZZZ */
+ }
+ return 0;
+}
+
+static void mpmt_pthread_pre_command_line(pool *pcommands)
+{
+ INIT_SIGLIST()
+ one_process = 0;
+}
+
+static void mpmt_pthread_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_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_threads_per_child = DEFAULT_THREADS_PER_CHILD;
+ ap_pid_fname = DEFAULT_PIDLOG;
+ ap_scoreboard_fname = DEFAULT_SCOREBOARD;
+ ap_lock_fname = DEFAULT_LOCKFILE;
+ ap_max_requests_per_child = DEFAULT_MAX_REQUESTS_PER_CHILD;
+ /* ZZZ Initialize the Network Address here. */
+ ap_bind_address.s_addr = htonl(INADDR_ANY);
+ ap_listeners = NULL;
+ ap_listenbacklog = DEFAULT_LISTENBACKLOG;
+ ap_extended_status = 0;
+
+ ap_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir));
+}
+
+static void mpmt_pthread_post_config(pool *pconf, pool *plog, pool *ptemp, server_rec *s)
+{
+ if (ap_listeners == NULL) {
+ /* allocate a default listener */
+ listen_rec *new;
+
+ new = ap_pcalloc(pconf, sizeof(listen_rec));
+ new->local_addr.sin_family = AF_INET;
+ new->local_addr.sin_addr = ap_bind_address;
+ new->local_addr.sin_port = htons(s->port ? s->port : DEFAULT_HTTP_PORT);
+ new->fd = -1;
+ new->next = NULL;
+ ap_listeners = new;
+ }
+}
+
+
+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_scoreboard(cmd_parms *cmd, void *dummy, char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_scoreboard_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_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_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 < 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;
+}
+
+static const char *set_listenbacklog(cmd_parms *cmd, void *dummy, char *arg)
+{
+ int b;
+
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ b = atoi(arg);
+ if (b < 1) {
+ return "ListenBacklog must be > 0";
+ }
+ ap_listenbacklog = b;
+ return NULL;
+}
+
+static const char *set_listener(cmd_parms *cmd, void *dummy, char *ips)
+{
+ listen_rec *new;
+ char *ports;
+ unsigned short port;
+
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ports = strchr(ips, ':');
+ if (ports != NULL) {
+ if (ports == ips) {
+ return "Missing IP address";
+ }
+ else if (ports[1] == '\0') {
+ return "Address must end in :<port-number>";
+ }
+ *(ports++) = '\0';
+ }
+ else {
+ ports = ips;
+ }
+
+ new=ap_pcalloc(cmd->pool, sizeof(listen_rec));
+ /* ZZZ let's set this using the AP funcs. */
+ new->local_addr.sin_family = AF_INET;
+ if (ports == ips) { /* no address */
+ /* ZZZ Initialize the Network Address */
+ new->local_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+ }
+ else {
+ new->local_addr.sin_addr.s_addr = ap_get_virthost_addr(ips, NULL);
+ }
+ port = atoi(ports);
+ if (!port) {
+ return "Port must be numeric";
+ }
+ /* ZZZ change to AP funcs.*/
+ new->local_addr.sin_port = htons(port);
+ new->fd = -1; /*ZZZ change to NULL */
+ new->used = 0;
+ new->next = ap_listeners;
+ ap_listeners = new;
+ 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 mpmt_pthread_cmds[] = {
+{ "PidFile", set_pidfile, NULL, RSRC_CONF, TAKE1,
+ "A file for logging the server process ID"},
+{ "ScoreBoardFile", set_scoreboard, NULL, RSRC_CONF, TAKE1,
+ "A file for Apache to maintain runtime process management information"},
+{ "LockFile", set_lockfile, NULL, RSRC_CONF, TAKE1,
+ "The lockfile used when Apache needs to lock the accept() call"},
+{ "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" },
+{ "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" },
+{ "ListenBacklog", set_listenbacklog, NULL, RSRC_CONF, TAKE1,
+ "Maximum length of the queue of pending connections, as used by listen(2)" },
+{ "Listen", set_listener, NULL, RSRC_CONF, TAKE1,
+ "A port number or a numeric IP address and a port number"},
+{ NULL }
+};
+
+module MODULE_VAR_EXPORT mpm_mpmt_pthread_module = {
+ STANDARD20_MODULE_STUFF,
+ mpmt_pthread_pre_command_line, /* pre_command_line */
+ mpmt_pthread_pre_config, /* pre_config */
+ mpmt_pthread_post_config, /* 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 */
+ mpmt_pthread_cmds, /* command table */
+ NULL, /* handlers */
+ NULL, /* translate_handler */
+ NULL, /* check_user_id */
+ NULL, /* check auth */
+ NULL, /* check access */
+ NULL, /* type_checker */
+ NULL, /* pre-run fixups */
+ NULL, /* logger */
+ NULL, /* header parser */
+ NULL /* post_read_request */
+};
+
+/* 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 */
+
+#include "acceptlock.c"
+#include "http_accept.c"
+#include "scoreboard.c"
--- /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.
+ */
+
+/* TODO: this is a cobbled together prefork MPM example... it should mostly
+ * TODO: behave like apache-1.3... here's a short list of things I think
+ * TODO: need cleaning up still:
+ * TODO: - use ralf's mm stuff for the shared mem and mutexes
+ * TODO: - abstract the Listen stuff, it's going to be common with other MPM
+ * TODO: - clean up scoreboard stuff when we figure out how to do it in 2.0
+ */
+
+#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_prefork.h"
+#include "ap_mpm.h"
+#include "unixd.h"
+#ifdef USE_SHMGET_SCOREBOARD
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#endif
+
+#ifdef HAVE_BSTRING_H
+#include <bstring.h> /* for IRIX, FD_SET calls bzero() */
+#endif
+
+/* config globals */
+
+static int ap_max_requests_per_child=0;
+static char *ap_pid_fname=NULL;
+static char *ap_scoreboard_fname=NULL;
+static char *ap_lock_fname;
+static char *ap_server_argv0=NULL;
+static struct in_addr ap_bind_address;
+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_listenbacklog;
+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;
+
+/*
+ * During config time, listeners is treated as a NULL-terminated list.
+ * child_main previously would start at the beginning of the list each time
+ * through the loop, so a socket early on in the list could easily starve out
+ * sockets later on in the list. The solution is to start at the listener
+ * after the last one processed. But to do that fast/easily in child_main it's
+ * way more convenient for listeners to be a ring that loops back on itself.
+ * The routine setup_listeners() is called after config time to both open up
+ * the sockets and to turn the NULL-terminated list into a ring that loops back
+ * on itself.
+ *
+ * head_listener is used by each child to keep track of what they consider
+ * to be the "start" of the ring. It is also set by make_child to ensure
+ * that new children also don't starve any sockets.
+ *
+ * Note that listeners != NULL is ensured by read_config().
+ */
+static listen_rec *ap_listeners;
+static listen_rec *head_listener;
+
+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 */
+#ifndef MULTITHREAD
+static int my_child_num;
+#endif
+
+#ifdef TPF
+int tpf_child = 0;
+char tpf_server_name[INETD_SERVNAME_LENGTH+1];
+#endif /* TPF */
+
+static scoreboard *ap_scoreboard_image = NULL;
+
+static int volatile exit_after_unblock = 0;
+
+#ifdef GPROF
+/*
+ * change directory for gprof to plop the gmon.out file
+ * configure in httpd.conf:
+ * GprofDir logs/ -> $ServerRoot/logs/gmon.out
+ * GprofDir logs/% -> $ServerRoot/logs/gprof.$pid/gmon.out
+ */
+static void chdir_for_gprof(void)
+{
+ core_server_config *sconf =
+ ap_get_module_config(server_conf->module_config, &core_module);
+ char *dir = sconf->gprof_dir;
+
+ if(dir) {
+ char buf[512];
+ int len = strlen(sconf->gprof_dir) - 1;
+ if(*(dir + len) == '%') {
+ dir[len] = '\0';
+ ap_snprintf(buf, sizeof(buf), "%sgprof.%d", dir, (int)getpid());
+ }
+ dir = ap_server_root_relative(pconf, buf[0] ? buf : dir);
+ if(mkdir(dir, 0755) < 0 && errno != EEXIST) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
+ "gprof: error creating directory %s", dir);
+ }
+ }
+ else {
+ dir = ap_server_root_relative(pconf, "logs");
+ }
+
+ chdir(dir);
+}
+#else
+#define chdir_for_gprof()
+#endif
+
+/* 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);
+ }
+ chdir_for_gprof();
+ exit(code);
+}
+
+#if defined(USE_FCNTL_SERIALIZED_ACCEPT) || defined(USE_FLOCK_SERIALIZED_ACCEPT)
+static void expand_lock_fname(pool *p)
+{
+ /* XXXX possibly bogus cast */
+ ap_lock_fname = ap_psprintf(p, "%s.%lu",
+ ap_server_root_relative(p, ap_lock_fname), (unsigned long)getpid());
+}
+#endif
+
+#if defined (USE_USLOCK_SERIALIZED_ACCEPT)
+
+#include <ulocks.h>
+
+static ulock_t uslock = NULL;
+
+#define accept_mutex_child_init(x)
+
+static void accept_mutex_init(pool *p)
+{
+ ptrdiff_t old;
+ usptr_t *us;
+
+
+ /* default is 8, allocate enough for all the children plus the parent */
+ if ((old = usconfig(CONF_INITUSERS, HARD_SERVER_LIMIT + 1)) == -1) {
+ perror("usconfig(CONF_INITUSERS)");
+ exit(-1);
+ }
+
+ if ((old = usconfig(CONF_LOCKTYPE, US_NODEBUG)) == -1) {
+ perror("usconfig(CONF_LOCKTYPE)");
+ exit(-1);
+ }
+ if ((old = usconfig(CONF_ARENATYPE, US_SHAREDONLY)) == -1) {
+ perror("usconfig(CONF_ARENATYPE)");
+ exit(-1);
+ }
+ if ((us = usinit("/dev/zero")) == NULL) {
+ perror("usinit");
+ exit(-1);
+ }
+
+ if ((uslock = usnewlock(us)) == NULL) {
+ perror("usnewlock");
+ exit(-1);
+ }
+}
+
+static void accept_mutex_on(void)
+{
+ switch (ussetlock(uslock)) {
+ case 1:
+ /* got lock */
+ break;
+ case 0:
+ fprintf(stderr, "didn't get lock\n");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ case -1:
+ perror("ussetlock");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+}
+
+static void accept_mutex_off(void)
+{
+ if (usunsetlock(uslock) == -1) {
+ perror("usunsetlock");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+}
+
+#elif defined (USE_PTHREAD_SERIALIZED_ACCEPT)
+
+/* This code probably only works on Solaris ... but it works really fast
+ * on Solaris. Note that pthread mutexes are *NOT* released when a task
+ * dies ... the task has to free it itself. So we block signals and
+ * try to be nice about releasing the mutex.
+ */
+
+#include <pthread.h>
+
+static pthread_mutex_t *accept_mutex = (void *)(caddr_t) -1;
+static int have_accept_mutex;
+static sigset_t accept_block_mask;
+static sigset_t accept_previous_mask;
+
+static void accept_mutex_child_cleanup(void *foo)
+{
+ if (accept_mutex != (void *)(caddr_t)-1
+ && have_accept_mutex) {
+ pthread_mutex_unlock(accept_mutex);
+ }
+}
+
+static void accept_mutex_child_init(pool *p)
+{
+ ap_register_cleanup(p, NULL, accept_mutex_child_cleanup, ap_null_cleanup);
+}
+
+static void accept_mutex_cleanup(void *foo)
+{
+ if (accept_mutex != (void *)(caddr_t)-1
+ && munmap((caddr_t) accept_mutex, sizeof(*accept_mutex))) {
+ perror("munmap");
+ }
+ accept_mutex = (void *)(caddr_t)-1;
+}
+
+static void accept_mutex_init(pool *p)
+{
+ pthread_mutexattr_t mattr;
+ int fd;
+
+ fd = open("/dev/zero", O_RDWR);
+ if (fd == -1) {
+ perror("open(/dev/zero)");
+ exit(APEXIT_INIT);
+ }
+ accept_mutex = (pthread_mutex_t *) mmap((caddr_t) 0, sizeof(*accept_mutex),
+ PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+ if (accept_mutex == (void *) (caddr_t) - 1) {
+ perror("mmap");
+ exit(APEXIT_INIT);
+ }
+ close(fd);
+ if ((errno = pthread_mutexattr_init(&mattr))) {
+ perror("pthread_mutexattr_init");
+ exit(APEXIT_INIT);
+ }
+ if ((errno = pthread_mutexattr_setpshared(&mattr,
+ PTHREAD_PROCESS_SHARED))) {
+ perror("pthread_mutexattr_setpshared");
+ exit(APEXIT_INIT);
+ }
+ if ((errno = pthread_mutex_init(accept_mutex, &mattr))) {
+ perror("pthread_mutex_init");
+ exit(APEXIT_INIT);
+ }
+ sigfillset(&accept_block_mask);
+ sigdelset(&accept_block_mask, SIGHUP);
+ sigdelset(&accept_block_mask, SIGTERM);
+ sigdelset(&accept_block_mask, SIGUSR1);
+ ap_register_cleanup(p, NULL, accept_mutex_cleanup, ap_null_cleanup);
+}
+
+static void accept_mutex_on(void)
+{
+ int err;
+
+ if (sigprocmask(SIG_BLOCK, &accept_block_mask, &accept_previous_mask)) {
+ perror("sigprocmask(SIG_BLOCK)");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+ if ((err = pthread_mutex_lock(accept_mutex))) {
+ errno = err;
+ perror("pthread_mutex_lock");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+ have_accept_mutex = 1;
+}
+
+static void accept_mutex_off(void)
+{
+ int err;
+
+ if ((err = pthread_mutex_unlock(accept_mutex))) {
+ errno = err;
+ perror("pthread_mutex_unlock");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+ /* There is a slight race condition right here... if we were to die right
+ * now, we'd do another pthread_mutex_unlock. Now, doing that would let
+ * another process into the mutex. pthread mutexes are designed to be
+ * fast, as such they don't have protection for things like testing if the
+ * thread owning a mutex is actually unlocking it (or even any way of
+ * testing who owns the mutex).
+ *
+ * If we were to unset have_accept_mutex prior to releasing the mutex
+ * then the race could result in the server unable to serve hits. Doing
+ * it this way means that the server can continue, but an additional
+ * child might be in the critical section ... at least it's still serving
+ * hits.
+ */
+ have_accept_mutex = 0;
+ if (sigprocmask(SIG_SETMASK, &accept_previous_mask, NULL)) {
+ perror("sigprocmask(SIG_SETMASK)");
+ clean_child_exit(1);
+ }
+}
+
+#elif defined (USE_SYSVSEM_SERIALIZED_ACCEPT)
+
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/sem.h>
+
+#ifdef NEED_UNION_SEMUN
+/* it makes no sense, but this isn't defined on solaris */
+union semun {
+ long val;
+ struct semid_ds *buf;
+ ushort *array;
+};
+
+#endif
+
+static int sem_id = -1;
+static struct sembuf op_on;
+static struct sembuf op_off;
+
+/* We get a random semaphore ... the lame sysv semaphore interface
+ * means we have to be sure to clean this up or else we'll leak
+ * semaphores.
+ */
+static void accept_mutex_cleanup(void *foo)
+{
+ union semun ick;
+
+ if (sem_id < 0)
+ return;
+ /* this is ignored anyhow */
+ ick.val = 0;
+ semctl(sem_id, 0, IPC_RMID, ick);
+}
+
+#define accept_mutex_child_init(x)
+
+static void accept_mutex_init(pool *p)
+{
+ union semun ick;
+ struct semid_ds buf;
+
+ /* acquire the semaphore */
+ sem_id = semget(IPC_PRIVATE, 1, IPC_CREAT | 0600);
+ if (sem_id < 0) {
+ perror("semget");
+ exit(APEXIT_INIT);
+ }
+ ick.val = 1;
+ if (semctl(sem_id, 0, SETVAL, ick) < 0) {
+ perror("semctl(SETVAL)");
+ exit(APEXIT_INIT);
+ }
+ if (!getuid()) {
+ /* restrict it to use only by the appropriate user_id ... not that this
+ * stops CGIs from acquiring it and dinking around with it.
+ */
+ buf.sem_perm.uid = unixd_config.user_id;
+ buf.sem_perm.gid = unixd_config.group_id;
+ buf.sem_perm.mode = 0600;
+ ick.buf = &buf;
+ if (semctl(sem_id, 0, IPC_SET, ick) < 0) {
+ perror("semctl(IPC_SET)");
+ exit(APEXIT_INIT);
+ }
+ }
+ ap_register_cleanup(p, NULL, accept_mutex_cleanup, ap_null_cleanup);
+
+ /* pre-initialize these */
+ op_on.sem_num = 0;
+ op_on.sem_op = -1;
+ op_on.sem_flg = SEM_UNDO;
+ op_off.sem_num = 0;
+ op_off.sem_op = 1;
+ op_off.sem_flg = SEM_UNDO;
+}
+
+static void accept_mutex_on(void)
+{
+ while (semop(sem_id, &op_on, 1) < 0) {
+ if (errno != EINTR) {
+ perror("accept_mutex_on");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+ }
+}
+
+static void accept_mutex_off(void)
+{
+ while (semop(sem_id, &op_off, 1) < 0) {
+ if (errno != EINTR) {
+ perror("accept_mutex_off");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+ }
+}
+
+#elif defined(USE_FCNTL_SERIALIZED_ACCEPT)
+static struct flock lock_it;
+static struct flock unlock_it;
+
+static int lock_fd = -1;
+
+#define accept_mutex_child_init(x)
+
+/*
+ * Initialize mutex lock.
+ * Must be safe to call this on a restart.
+ */
+static void accept_mutex_init(pool *p)
+{
+
+ lock_it.l_whence = SEEK_SET; /* from current point */
+ lock_it.l_start = 0; /* -"- */
+ lock_it.l_len = 0; /* until end of file */
+ lock_it.l_type = F_WRLCK; /* set exclusive/write lock */
+ lock_it.l_pid = 0; /* pid not actually interesting */
+ unlock_it.l_whence = SEEK_SET; /* from current point */
+ unlock_it.l_start = 0; /* -"- */
+ unlock_it.l_len = 0; /* until end of file */
+ unlock_it.l_type = F_UNLCK; /* set exclusive/write lock */
+ unlock_it.l_pid = 0; /* pid not actually interesting */
+
+ expand_lock_fname(p);
+ lock_fd = ap_popenf(p, ap_lock_fname, O_CREAT | O_WRONLY | O_EXCL, 0644);
+ if (lock_fd == -1) {
+ perror("open");
+ fprintf(stderr, "Cannot open lock file: %s\n", ap_lock_fname);
+ exit(APEXIT_INIT);
+ }
+ unlink(ap_lock_fname);
+}
+
+static void accept_mutex_on(void)
+{
+ int ret;
+
+ while ((ret = fcntl(lock_fd, F_SETLKW, &lock_it)) < 0 && errno == EINTR) {
+ /* nop */
+ }
+
+ if (ret < 0) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, server_conf,
+ "fcntl: F_SETLKW: Error getting accept lock, exiting! "
+ "Perhaps you need to use the LockFile directive to place "
+ "your lock file on a local disk!");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+}
+
+static void accept_mutex_off(void)
+{
+ int ret;
+
+ while ((ret = fcntl(lock_fd, F_SETLKW, &unlock_it)) < 0 && errno == EINTR) {
+ /* nop */
+ }
+ if (ret < 0) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, server_conf,
+ "fcntl: F_SETLKW: Error freeing accept lock, exiting! "
+ "Perhaps you need to use the LockFile directive to place "
+ "your lock file on a local disk!");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+}
+
+#elif defined(USE_FLOCK_SERIALIZED_ACCEPT)
+
+static int lock_fd = -1;
+
+static void accept_mutex_cleanup(void *foo)
+{
+ unlink(ap_lock_fname);
+}
+
+/*
+ * Initialize mutex lock.
+ * Done by each child at it's birth
+ */
+static void accept_mutex_child_init(pool *p)
+{
+
+ lock_fd = ap_popenf(p, ap_lock_fname, O_WRONLY, 0600);
+ if (lock_fd == -1) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, server_conf,
+ "Child cannot open lock file: %s", ap_lock_fname);
+ clean_child_exit(APEXIT_CHILDINIT);
+ }
+}
+
+/*
+ * Initialize mutex lock.
+ * Must be safe to call this on a restart.
+ */
+static void accept_mutex_init(pool *p)
+{
+ expand_lock_fname(p);
+ unlink(ap_lock_fname);
+ lock_fd = ap_popenf(p, ap_lock_fname, O_CREAT | O_WRONLY | O_EXCL, 0600);
+ if (lock_fd == -1) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, server_conf,
+ "Parent cannot open lock file: %s", ap_lock_fname);
+ exit(APEXIT_INIT);
+ }
+ ap_register_cleanup(p, NULL, accept_mutex_cleanup, ap_null_cleanup);
+}
+
+static void accept_mutex_on(void)
+{
+ int ret;
+
+ while ((ret = flock(lock_fd, LOCK_EX)) < 0 && errno == EINTR)
+ continue;
+
+ if (ret < 0) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, server_conf,
+ "flock: LOCK_EX: Error getting accept lock. Exiting!");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+}
+
+static void accept_mutex_off(void)
+{
+ if (flock(lock_fd, LOCK_UN) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, server_conf,
+ "flock: LOCK_UN: Error freeing accept lock. Exiting!");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+}
+
+#elif 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);
+ }
+}
+
+/*
+ * 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);
+
+ 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);
+ }
+}
+
+#elif defined(USE_TPF_CORE_SERIALIZED_ACCEPT)
+
+static int tpf_core_held;
+
+static void accept_mutex_cleanup(void *foo)
+{
+ if(tpf_core_held)
+ coruc(RESOURCE_KEY);
+}
+
+#define accept_mutex_init(x)
+
+static void accept_mutex_child_init(pool *p)
+{
+ ap_register_cleanup(p, NULL, accept_mutex_cleanup, ap_null_cleanup);
+ tpf_core_held = 0;
+}
+
+static void accept_mutex_on(void)
+{
+ corhc(RESOURCE_KEY);
+ tpf_core_held = 1;
+ ap_check_signals();
+}
+
+static void accept_mutex_off(void)
+{
+ coruc(RESOURCE_KEY);
+ tpf_core_held = 0;
+ ap_check_signals();
+}
+
+#else
+/* Default --- no serialization. Other methods *could* go here,
+ * as #elifs...
+ */
+#if !defined(MULTITHREAD)
+/* Multithreaded systems don't complete between processes for
+ * the sockets. */
+#define NO_SERIALIZED_ACCEPT
+#define accept_mutex_child_init(x)
+#define accept_mutex_init(x)
+#define accept_mutex_on()
+#define accept_mutex_off()
+#endif
+#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 != ap_listeners) {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
+
+/*****************************************************************
+ *
+ * Dealing with the scoreboard... a lot of these variables are global
+ * only to avoid getting clobbered by the longjmp() that happens when
+ * a hard timeout expires...
+ *
+ * We begin with routines which deal with the file itself...
+ */
+
+#if defined(USE_OS2_SCOREBOARD)
+
+/* The next two routines are used to access shared memory under OS/2. */
+/* This requires EMX v09c to be installed. */
+
+caddr_t create_shared_heap(const char *name, size_t size)
+{
+ ULONG rc;
+ void *mem;
+ Heap_t h;
+
+ rc = DosAllocSharedMem(&mem, name, size,
+ PAG_COMMIT | PAG_READ | PAG_WRITE);
+ if (rc != 0)
+ return NULL;
+ h = _ucreate(mem, size, !_BLOCK_CLEAN, _HEAP_REGULAR | _HEAP_SHARED,
+ NULL, NULL);
+ if (h == NULL)
+ DosFreeMem(mem);
+ return (caddr_t) h;
+}
+
+caddr_t get_shared_heap(const char *Name)
+{
+
+ PVOID BaseAddress; /* Pointer to the base address of
+ the shared memory object */
+ ULONG AttributeFlags; /* Flags describing characteristics
+ of the shared memory object */
+ APIRET rc; /* Return code */
+
+ /* Request read and write access to */
+ /* the shared memory object */
+ AttributeFlags = PAG_WRITE | PAG_READ;
+
+ rc = DosGetNamedSharedMem(&BaseAddress, Name, AttributeFlags);
+
+ if (rc != 0) {
+ printf("DosGetNamedSharedMem error: return code = %ld", rc);
+ return 0;
+ }
+
+ return BaseAddress;
+}
+
+static void setup_shared_mem(pool *p)
+{
+ caddr_t m;
+
+ int rc;
+
+ m = (caddr_t) create_shared_heap("\\SHAREMEM\\SCOREBOARD", SCOREBOARD_SIZE);
+ if (m == 0) {
+ fprintf(stderr, "%s: Could not create OS/2 Shared memory pool.\n",
+ ap_server_argv0);
+ exit(APEXIT_INIT);
+ }
+
+ rc = _uopen((Heap_t) m);
+ if (rc != 0) {
+ fprintf(stderr,
+ "%s: Could not uopen() newly created OS/2 Shared memory pool.\n",
+ ap_server_argv0);
+ }
+ ap_scoreboard_image = (scoreboard *) m;
+ ap_scoreboard_image->global.running_generation = 0;
+}
+
+static void reopen_scoreboard(pool *p)
+{
+ caddr_t m;
+ int rc;
+
+ m = (caddr_t) get_shared_heap("\\SHAREMEM\\SCOREBOARD");
+ if (m == 0) {
+ fprintf(stderr, "%s: Could not find existing OS/2 Shared memory pool.\n",
+ ap_server_argv0);
+ exit(APEXIT_INIT);
+ }
+
+ rc = _uopen((Heap_t) m);
+ ap_scoreboard_image = (scoreboard *) m;
+}
+
+#elif defined(USE_POSIX_SCOREBOARD)
+#include <sys/mman.h>
+/*
+ * POSIX 1003.4 style
+ *
+ * Note 1:
+ * As of version 4.23A, shared memory in QNX must reside under /dev/shmem,
+ * where no subdirectories allowed.
+ *
+ * POSIX shm_open() and shm_unlink() will take care about this issue,
+ * but to avoid confusion, I suggest to redefine scoreboard file name
+ * in httpd.conf to cut "logs/" from it. With default setup actual name
+ * will be "/dev/shmem/logs.apache_status".
+ *
+ * If something went wrong and Apache did not unlinked this object upon
+ * exit, you can remove it manually, using "rm -f" command.
+ *
+ * Note 2:
+ * <sys/mman.h> in QNX defines MAP_ANON, but current implementation
+ * does NOT support BSD style anonymous mapping. So, the order of
+ * conditional compilation is important:
+ * this #ifdef section must be ABOVE the next one (BSD style).
+ *
+ * I tested this stuff and it works fine for me, but if it provides
+ * trouble for you, just comment out USE_MMAP_SCOREBOARD in QNX section
+ * of ap_config.h
+ *
+ * June 5, 1997,
+ * Igor N. Kovalenko -- infoh@mail.wplus.net
+ */
+
+static void cleanup_shared_mem(void *d)
+{
+ shm_unlink(ap_scoreboard_fname);
+}
+
+static void setup_shared_mem(pool *p)
+{
+ char buf[512];
+ caddr_t m;
+ int fd;
+
+ fd = shm_open(ap_scoreboard_fname, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
+ if (fd == -1) {
+ ap_snprintf(buf, sizeof(buf), "%s: could not open(create) scoreboard",
+ ap_server_argv0);
+ perror(buf);
+ exit(APEXIT_INIT);
+ }
+ if (ltrunc(fd, (off_t) SCOREBOARD_SIZE, SEEK_SET) == -1) {
+ ap_snprintf(buf, sizeof(buf), "%s: could not ltrunc scoreboard",
+ ap_server_argv0);
+ perror(buf);
+ shm_unlink(ap_scoreboard_fname);
+ exit(APEXIT_INIT);
+ }
+ if ((m = (caddr_t) mmap((caddr_t) 0,
+ (size_t) SCOREBOARD_SIZE, PROT_READ | PROT_WRITE,
+ MAP_SHARED, fd, (off_t) 0)) == (caddr_t) - 1) {
+ ap_snprintf(buf, sizeof(buf), "%s: cannot mmap scoreboard",
+ ap_server_argv0);
+ perror(buf);
+ shm_unlink(ap_scoreboard_fname);
+ exit(APEXIT_INIT);
+ }
+ close(fd);
+ ap_register_cleanup(p, NULL, cleanup_shared_mem, ap_null_cleanup);
+ ap_scoreboard_image = (scoreboard *) m;
+ ap_scoreboard_image->global.running_generation = 0;
+}
+
+static void reopen_scoreboard(pool *p)
+{
+}
+
+#elif defined(USE_MMAP_SCOREBOARD)
+
+static void setup_shared_mem(pool *p)
+{
+ caddr_t m;
+
+#if defined(MAP_ANON)
+/* BSD style */
+#ifdef CONVEXOS11
+ /*
+ * 9-Aug-97 - Jeff Venters (venters@convex.hp.com)
+ * ConvexOS maps address space as follows:
+ * 0x00000000 - 0x7fffffff : Kernel
+ * 0x80000000 - 0xffffffff : User
+ * Start mmapped area 1GB above start of text.
+ *
+ * Also, the length requires a pointer as the actual length is
+ * returned (rounded up to a page boundary).
+ */
+ {
+ unsigned len = SCOREBOARD_SIZE;
+
+ m = mmap((caddr_t) 0xC0000000, &len,
+ PROT_READ | PROT_WRITE, MAP_ANON | MAP_SHARED, NOFD, 0);
+ }
+#elif defined(MAP_TMPFILE)
+ {
+ char mfile[] = "/tmp/apache_shmem_XXXX";
+ int fd = mkstemp(mfile);
+ if (fd == -1) {
+ perror("open");
+ fprintf(stderr, "%s: Could not open %s\n", ap_server_argv0, mfile);
+ exit(APEXIT_INIT);
+ }
+ m = mmap((caddr_t) 0, SCOREBOARD_SIZE,
+ PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+ if (m == (caddr_t) - 1) {
+ perror("mmap");
+ fprintf(stderr, "%s: Could not mmap %s\n", ap_server_argv0, mfile);
+ exit(APEXIT_INIT);
+ }
+ close(fd);
+ unlink(mfile);
+ }
+#else
+ m = mmap((caddr_t) 0, SCOREBOARD_SIZE,
+ PROT_READ | PROT_WRITE, MAP_ANON | MAP_SHARED, -1, 0);
+#endif
+ if (m == (caddr_t) - 1) {
+ perror("mmap");
+ fprintf(stderr, "%s: Could not mmap memory\n", ap_server_argv0);
+ exit(APEXIT_INIT);
+ }
+#else
+/* Sun style */
+ int fd;
+
+ fd = open("/dev/zero", O_RDWR);
+ if (fd == -1) {
+ perror("open");
+ fprintf(stderr, "%s: Could not open /dev/zero\n", ap_server_argv0);
+ exit(APEXIT_INIT);
+ }
+ m = mmap((caddr_t) 0, SCOREBOARD_SIZE,
+ PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+ if (m == (caddr_t) - 1) {
+ perror("mmap");
+ fprintf(stderr, "%s: Could not mmap /dev/zero\n", ap_server_argv0);
+ exit(APEXIT_INIT);
+ }
+ close(fd);
+#endif
+ ap_scoreboard_image = (scoreboard *) m;
+ ap_scoreboard_image->global.running_generation = 0;
+}
+
+static void reopen_scoreboard(pool *p)
+{
+}
+
+#elif defined(USE_SHMGET_SCOREBOARD)
+static key_t shmkey = IPC_PRIVATE;
+static int shmid = -1;
+
+static void setup_shared_mem(pool *p)
+{
+ struct shmid_ds shmbuf;
+#ifdef MOVEBREAK
+ char *obrk;
+#endif
+
+ if ((shmid = shmget(shmkey, SCOREBOARD_SIZE, IPC_CREAT | SHM_R | SHM_W)) == -1) {
+#ifdef LINUX
+ if (errno == ENOSYS) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_EMERG, server_conf,
+ "Your kernel was built without CONFIG_SYSVIPC\n"
+ "%s: Please consult the Apache FAQ for details",
+ ap_server_argv0);
+ }
+#endif
+ ap_log_error(APLOG_MARK, APLOG_EMERG, server_conf,
+ "could not call shmget");
+ exit(APEXIT_INIT);
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, server_conf,
+ "created shared memory segment #%d", shmid);
+
+#ifdef MOVEBREAK
+ /*
+ * Some SysV systems place the shared segment WAY too close
+ * to the dynamic memory break point (sbrk(0)). This severely
+ * limits the use of malloc/sbrk in the program since sbrk will
+ * refuse to move past that point.
+ *
+ * To get around this, we move the break point "way up there",
+ * attach the segment and then move break back down. Ugly
+ */
+ if ((obrk = sbrk(MOVEBREAK)) == (char *) -1) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
+ "sbrk() could not move break");
+ }
+#endif
+
+#define BADSHMAT ((scoreboard *)(-1))
+ if ((ap_scoreboard_image = (scoreboard *) shmat(shmid, 0, 0)) == BADSHMAT) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, server_conf, "shmat error");
+ /*
+ * We exit below, after we try to remove the segment
+ */
+ }
+ else { /* only worry about permissions if we attached the segment */
+ if (shmctl(shmid, IPC_STAT, &shmbuf) != 0) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
+ "shmctl() could not stat segment #%d", shmid);
+ }
+ else {
+ shmbuf.shm_perm.uid = unixd_config.user_id;
+ shmbuf.shm_perm.gid = unixd_config.group_id;
+ if (shmctl(shmid, IPC_SET, &shmbuf) != 0) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
+ "shmctl() could not set segment #%d", shmid);
+ }
+ }
+ }
+ /*
+ * We must avoid leaving segments in the kernel's
+ * (small) tables.
+ */
+ if (shmctl(shmid, IPC_RMID, NULL) != 0) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
+ "shmctl: IPC_RMID: could not remove shared memory segment #%d",
+ shmid);
+ }
+ if (ap_scoreboard_image == BADSHMAT) /* now bailout */
+ exit(APEXIT_INIT);
+
+#ifdef MOVEBREAK
+ if (obrk == (char *) -1)
+ return; /* nothing else to do */
+ if (sbrk(-(MOVEBREAK)) == (char *) -1) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
+ "sbrk() could not move break back");
+ }
+#endif
+ ap_scoreboard_image->global.running_generation = 0;
+}
+
+static void reopen_scoreboard(pool *p)
+{
+}
+
+#elif defined(USE_TPF_SCOREBOARD)
+
+static void cleanup_scoreboard_heap()
+{
+ int rv;
+ rv = rsysc(ap_scoreboard_image, SCOREBOARD_FRAMES, SCOREBOARD_NAME);
+ if(rv == RSYSC_ERROR) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
+ "rsysc() could not release scoreboard system heap");
+ }
+}
+
+static void setup_shared_mem(pool *p)
+{
+ cinfc(CINFC_WRITE, CINFC_CMMCTK2);
+ ap_scoreboard_image = (scoreboard *) gsysc(SCOREBOARD_FRAMES, SCOREBOARD_NAME);
+
+ if (!ap_scoreboard_image) {
+ fprintf(stderr, "httpd: Could not create scoreboard system heap storage.\n");
+ exit(APEXIT_INIT);
+ }
+
+ ap_register_cleanup(p, NULL, cleanup_scoreboard_heap, ap_null_cleanup);
+ ap_scoreboard_image->global.running_generation = 0;
+}
+
+static void reopen_scoreboard(pool *p)
+{
+ cinfc(CINFC_WRITE, CINFC_CMMCTK2);
+}
+
+#else
+#define SCOREBOARD_FILE
+static scoreboard _scoreboard_image;
+static int scoreboard_fd = -1;
+
+/* XXX: things are seriously screwed if we ever have to do a partial
+ * read or write ... we could get a corrupted scoreboard
+ */
+static int force_write(int fd, void *buffer, int bufsz)
+{
+ int rv, orig_sz = bufsz;
+
+ do {
+ rv = write(fd, buffer, bufsz);
+ if (rv > 0) {
+ buffer = (char *) buffer + rv;
+ bufsz -= rv;
+ }
+ } while ((rv > 0 && bufsz > 0) || (rv == -1 && errno == EINTR));
+
+ return rv < 0 ? rv : orig_sz - bufsz;
+}
+
+static int force_read(int fd, void *buffer, int bufsz)
+{
+ int rv, orig_sz = bufsz;
+
+ do {
+ rv = read(fd, buffer, bufsz);
+ if (rv > 0) {
+ buffer = (char *) buffer + rv;
+ bufsz -= rv;
+ }
+ } while ((rv > 0 && bufsz > 0) || (rv == -1 && errno == EINTR));
+
+ return rv < 0 ? rv : orig_sz - bufsz;
+}
+
+static void cleanup_scoreboard_file(void *foo)
+{
+ unlink(ap_scoreboard_fname);
+}
+
+void reopen_scoreboard(pool *p)
+{
+ if (scoreboard_fd != -1)
+ ap_pclosef(p, scoreboard_fd);
+
+#ifdef TPF
+ ap_scoreboard_fname = ap_server_root_relative(p, ap_scoreboard_fname);
+#endif /* TPF */
+ scoreboard_fd = ap_popenf(p, ap_scoreboard_fname, O_CREAT | O_BINARY | O_RDWR, 0666);
+ if (scoreboard_fd == -1) {
+ perror(ap_scoreboard_fname);
+ fprintf(stderr, "Cannot open scoreboard file:\n");
+ clean_child_exit(1);
+ }
+}
+#endif
+
+/* Called by parent process */
+static void reinit_scoreboard(pool *p)
+{
+ int running_gen = 0;
+ if (ap_scoreboard_image)
+ running_gen = ap_scoreboard_image->global.running_generation;
+
+#ifndef SCOREBOARD_FILE
+ if (ap_scoreboard_image == NULL) {
+ setup_shared_mem(p);
+ }
+ memset(ap_scoreboard_image, 0, SCOREBOARD_SIZE);
+ ap_scoreboard_image->global.running_generation = running_gen;
+#else
+ ap_scoreboard_image = &_scoreboard_image;
+ ap_scoreboard_fname = ap_server_root_relative(p, ap_scoreboard_fname);
+
+ scoreboard_fd = ap_popenf(p, ap_scoreboard_fname, O_CREAT | O_BINARY | O_RDWR, 0644);
+ if (scoreboard_fd == -1) {
+ perror(ap_scoreboard_fname);
+ fprintf(stderr, "Cannot open scoreboard file:\n");
+ exit(APEXIT_INIT);
+ }
+ ap_register_cleanup(p, NULL, cleanup_scoreboard_file, ap_null_cleanup);
+
+ memset((char *) ap_scoreboard_image, 0, sizeof(*ap_scoreboard_image));
+ ap_scoreboard_image->global.running_generation = running_gen;
+ force_write(scoreboard_fd, ap_scoreboard_image, sizeof(*ap_scoreboard_image));
+#endif
+}
+
+/* Routines called to deal with the scoreboard image
+ * --- note that we do *not* need write locks, since update_child_status
+ * only updates a *single* record in place, and only one process writes to
+ * a given scoreboard slot at a time (either the child process owning that
+ * slot, or the parent, noting that the child has died).
+ *
+ * As a final note --- setting the score entry to getpid() is always safe,
+ * since when the parent is writing an entry, it's only noting SERVER_DEAD
+ * anyway.
+ */
+
+ap_inline void ap_sync_scoreboard_image(void)
+{
+#ifdef SCOREBOARD_FILE
+ lseek(scoreboard_fd, 0L, 0);
+ force_read(scoreboard_fd, ap_scoreboard_image, sizeof(*ap_scoreboard_image));
+#endif
+}
+
+API_EXPORT(int) ap_exists_scoreboard_image(void)
+{
+ return (ap_scoreboard_image ? 1 : 0);
+}
+
+static ap_inline void put_scoreboard_info(int child_num,
+ short_score *new_score_rec)
+{
+#ifdef SCOREBOARD_FILE
+ lseek(scoreboard_fd, (long) child_num * sizeof(short_score), 0);
+ force_write(scoreboard_fd, new_score_rec, sizeof(short_score));
+#endif
+}
+
+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();
+
+ ap_sync_scoreboard_image();
+ 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 = ap_my_generation;
+#ifdef SCOREBOARD_FILE
+ lseek(scoreboard_fd, XtOffsetOf(scoreboard, parent[child_num]), 0);
+ force_write(scoreboard_fd, &ap_scoreboard_image->parent[child_num],
+ sizeof(parent_score));
+#endif
+ }
+ put_scoreboard_info(child_num, ss);
+
+ return old_status;
+}
+
+static void update_scoreboard_global(void)
+{
+#ifdef SCOREBOARD_FILE
+ lseek(scoreboard_fd,
+ (char *) &ap_scoreboard_image->global -(char *) ap_scoreboard_image, 0);
+ force_write(scoreboard_fd, &ap_scoreboard_image->global,
+ sizeof ap_scoreboard_image->global);
+#endif
+}
+
+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;
+
+ ap_sync_scoreboard_image();
+ 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
+
+ }
+
+ put_scoreboard_info(child_num, ss);
+}
+
+static void increment_counts(int child_num, request_rec *r)
+{
+ long int bs = 0;
+ short_score *ss;
+
+ ap_sync_scoreboard_image();
+ 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;
+
+ put_scoreboard_info(child_num, ss);
+}
+
+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;
+}
+
+static void reclaim_child_processes(int terminate)
+{
+#ifndef MULTITHREAD
+ 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
+
+ ap_sync_scoreboard_image();
+
+ 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->parent[i].pid;
+
+ if (pid == my_pid || pid == 0)
+ continue;
+
+ waitret = waitpid(pid, &status, WNOHANG);
+ if (waitret == pid || waitret == -1) {
+ ap_scoreboard_image->parent[i].pid = 0;
+ continue;
+ }
+ ++not_dead_yet;
+ switch (tries) {
+ case 1: /* 16ms */
+ case 2: /* 82ms */
+ break;
+ case 3: /* 344ms */
+ /* perhaps it missed the SIGHUP, lets try again */
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING,
+ server_conf,
+ "child process %d did not exit, sending another SIGHUP",
+ pid);
+ kill(pid, SIGHUP);
+ waittime = 1024 * 16;
+ break;
+ case 4: /* 16ms */
+ case 5: /* 82ms */
+ case 6: /* 344ms */
+ break;
+ 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;
+ }
+ }
+#endif /* ndef MULTITHREAD */
+}
+
+
+#if defined(NEED_WAITPID)
+/*
+ Systems without a real waitpid sometimes lose a child's exit while waiting
+ for another. Search through the scoreboard for missing children.
+ */
+int reap_children(ap_wait_t *status)
+{
+ int n, pid;
+
+ for (n = 0; n < max_daemons_limit; ++n) {
+ ap_sync_scoreboard_image();
+ if (ap_scoreboard_image->servers[n].status != SERVER_DEAD &&
+ kill((pid = ap_scoreboard_image->parent[n].pid), 0) == -1) {
+ ap_update_child_status(n, SERVER_DEAD, NULL);
+ /* just mark it as having a successful exit status */
+ bzero((char *) status, sizeof(ap_wait_t));
+ return(pid);
+ }
+ }
+ return 0;
+}
+#endif
+
+/* 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;
+ }
+#ifdef NEED_WAITPID
+ if ((ret = reap_children(status)) > 0) {
+ return ret;
+ }
+#endif
+ 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;
+ap_generation_t volatile ap_my_generation=0;
+
+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
+}
+
+/*****************************************************************
+ * Connection structures and accounting...
+ */
+
+
+static conn_rec *new_connection(pool *p, server_rec *server, BUFF *inout,
+ const struct sockaddr_in *remaddr,
+ const struct sockaddr_in *saddr,
+ int child_num)
+{
+ conn_rec *conn = (conn_rec *) ap_pcalloc(p, sizeof(conn_rec));
+
+ /* Got a connection structure, so initialize what fields we can
+ * (the rest are zeroed out by pcalloc).
+ */
+
+ conn->child_num = child_num;
+
+ conn->pool = p;
+ conn->local_addr = *saddr;
+ conn->base_server = server;
+ conn->client = inout;
+
+ conn->remote_addr = *remaddr;
+ conn->remote_ip = ap_pstrdup(conn->pool,
+ inet_ntoa(conn->remote_addr.sin_addr));
+
+ return conn;
+}
+
+#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
+
+
+static int make_sock(pool *p, const struct sockaddr_in *server)
+{
+ int s;
+ int one = 1;
+ char addr[512];
+
+ if (server->sin_addr.s_addr != htonl(INADDR_ANY))
+ ap_snprintf(addr, sizeof(addr), "address %s port %d",
+ inet_ntoa(server->sin_addr), ntohs(server->sin_port));
+ else
+ ap_snprintf(addr, sizeof(addr), "port %d", ntohs(server->sin_port));
+
+ /* note that because we're about to slack we don't use psocket */
+ if ((s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, server_conf,
+ "make_sock: failed to get a socket for %s", addr);
+ exit(1);
+ }
+
+ /* Solaris (probably versions 2.4, 2.5, and 2.5.1 with various levels
+ * of tcp patches) has some really weird bugs where if you dup the
+ * socket now it breaks things across SIGHUP restarts. It'll either
+ * be unable to bind, or it won't respond.
+ */
+#if defined (SOLARIS2) && SOLARIS2 < 260
+#define WORKAROUND_SOLARIS_BUG
+#endif
+
+ /* PR#1282 Unixware 1.x appears to have the same problem as solaris */
+#if defined (UW) && UW < 200
+#define WORKAROUND_SOLARIS_BUG
+#endif
+
+ /* PR#1973 NCR SVR4 systems appear to have the same problem */
+#if defined (MPRAS)
+#define WORKAROUND_SOLARIS_BUG
+#endif
+
+#ifndef WORKAROUND_SOLARIS_BUG
+ s = ap_slack(s, AP_SLACK_HIGH);
+
+ ap_note_cleanups_for_socket(p, s); /* arrange to close on exec or restart */
+#ifdef TPF
+ os_note_additional_cleanups(p, s);
+#endif /* TPF */
+#endif
+
+#ifndef MPE
+/* MPE does not support SO_REUSEADDR and SO_KEEPALIVE */
+#ifndef _OSD_POSIX
+ if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *) &one, sizeof(int)) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, server_conf,
+ "make_sock: for %s, setsockopt: (SO_REUSEADDR)", addr);
+ close(s);
+ return -1;
+ }
+#endif /*_OSD_POSIX*/
+ one = 1;
+#ifdef SO_KEEPALIVE
+ if (setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (char *) &one, sizeof(int)) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, server_conf,
+ "make_sock: for %s, setsockopt: (SO_KEEPALIVE)", addr);
+ close(s);
+ return -1;
+ }
+#endif
+#endif
+
+ sock_disable_nagle(s);
+
+ /*
+ * To send data over high bandwidth-delay connections at full
+ * speed we must force the TCP window to open wide enough to keep the
+ * pipe full. The default window size on many systems
+ * is only 4kB. Cross-country WAN connections of 100ms
+ * at 1Mb/s are not impossible for well connected sites.
+ * If we assume 100ms cross-country latency,
+ * a 4kB buffer limits throughput to 40kB/s.
+ *
+ * To avoid this problem I've added the SendBufferSize directive
+ * to allow the web master to configure send buffer size.
+ *
+ * The trade-off of larger buffers is that more kernel memory
+ * is consumed. YMMV, know your customers and your network!
+ *
+ * -John Heidemann <johnh@isi.edu> 25-Oct-96
+ *
+ * If no size is specified, use the kernel default.
+ */
+#ifndef BEOS /* BeOS does not support SO_SNDBUF */
+ if (server_conf->send_buffer_size) {
+ if (setsockopt(s, SOL_SOCKET, SO_SNDBUF,
+ (char *) &server_conf->send_buffer_size, sizeof(int)) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, server_conf,
+ "make_sock: failed to set SendBufferSize for %s, "
+ "using default", addr);
+ /* not a fatal error */
+ }
+ }
+#endif
+
+#ifdef MPE
+/* MPE requires CAP=PM and GETPRIVMODE to bind to ports less than 1024 */
+ if (ntohs(server->sin_port) < 1024)
+ GETPRIVMODE();
+#endif
+ if (bind(s, (struct sockaddr *) server, sizeof(struct sockaddr_in)) == -1) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, server_conf,
+ "make_sock: could not bind to %s", addr);
+#ifdef MPE
+ if (ntohs(server->sin_port) < 1024)
+ GETUSERMODE();
+#endif
+ close(s);
+ exit(1);
+ }
+#ifdef MPE
+ if (ntohs(server->sin_port) < 1024)
+ GETUSERMODE();
+#endif
+
+ if (listen(s, ap_listenbacklog) == -1) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
+ "make_sock: unable to listen for connections on %s", addr);
+ close(s);
+ exit(1);
+ }
+
+#ifdef WORKAROUND_SOLARIS_BUG
+ s = ap_slack(s, AP_SLACK_HIGH);
+
+ ap_note_cleanups_for_socket(p, s); /* arrange to close on exec or restart */
+#endif
+
+#ifdef CHECK_FD_SETSIZE
+ /* protect various fd_sets */
+ if (s >= FD_SETSIZE) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, NULL,
+ "make_sock: problem listening on %s, filedescriptor (%u) "
+ "larger than FD_SETSIZE (%u) "
+ "found, you probably need to rebuild Apache with a "
+ "larger FD_SETSIZE", addr, s, FD_SETSIZE);
+ close(s);
+ return -1;
+ }
+#endif
+
+ return s;
+}
+
+
+/*
+ * During a restart we keep track of the old listeners here, so that we
+ * can re-use the sockets. We have to do this because we won't be able
+ * to re-open the sockets ("Address already in use").
+ *
+ * Unlike the listeners ring, old_listeners is a NULL terminated list.
+ *
+ * copy_listeners() makes the copy, find_listener() finds an old listener
+ * and close_unused_listener() cleans up whatever wasn't used.
+ */
+static listen_rec *old_listeners;
+
+/* unfortunately copy_listeners may be called before listeners is a ring */
+static void copy_listeners(pool *p)
+{
+ listen_rec *lr;
+
+ ap_assert(old_listeners == NULL);
+ if (ap_listeners == NULL) {
+ return;
+ }
+ lr = ap_listeners;
+ do {
+ listen_rec *nr = malloc(sizeof *nr);
+ if (nr == NULL) {
+ fprintf(stderr, "Ouch! malloc failed in copy_listeners()\n");
+ exit(1);
+ }
+ *nr = *lr;
+ ap_kill_cleanups_for_socket(p, nr->fd);
+ nr->next = old_listeners;
+ ap_assert(!nr->used);
+ old_listeners = nr;
+ lr = lr->next;
+ } while (lr && lr != ap_listeners);
+}
+
+
+static int find_listener(listen_rec *lr)
+{
+ listen_rec *or;
+
+ for (or = old_listeners; or; or = or->next) {
+ if (!memcmp(&or->local_addr, &lr->local_addr, sizeof(or->local_addr))) {
+ or->used = 1;
+ return or->fd;
+ }
+ }
+ return -1;
+}
+
+
+static void close_unused_listeners(void)
+{
+ listen_rec *or, *next;
+
+ for (or = old_listeners; or; or = next) {
+ next = or->next;
+ if (!or->used)
+ closesocket(or->fd);
+ free(or);
+ }
+ old_listeners = NULL;
+}
+
+
+/* open sockets, and turn the listeners list into a singly linked ring */
+static void setup_listeners(pool *p)
+{
+ listen_rec *lr;
+ int fd;
+
+ listenmaxfd = -1;
+ FD_ZERO(&listenfds);
+ lr = ap_listeners;
+ for (;;) {
+ fd = find_listener(lr);
+ if (fd < 0) {
+ fd = make_sock(p, &lr->local_addr);
+ }
+ else {
+ ap_note_cleanups_for_socket(p, fd);
+ }
+ if (fd >= 0) {
+ FD_SET(fd, &listenfds);
+ if (fd > listenmaxfd)
+ listenmaxfd = fd;
+ }
+ lr->fd = fd;
+ if (lr->next == NULL)
+ break;
+ lr = lr->next;
+ }
+ /* turn the list into a ring */
+ lr->next = ap_listeners;
+ head_listener = ap_listeners;
+ close_unused_listeners();
+
+#ifdef NO_SERIALIZED_ACCEPT
+ /* warn them about the starvation problem if they're using multiple
+ * sockets
+ */
+ if (ap_listeners->next != ap_listeners) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_CRIT, NULL,
+ "You cannot use multiple Listens safely on your system, "
+ "proceeding anyway. See src/PORTING, search for "
+ "SERIALIZED_ACCEPT.");
+ }
+#endif
+}
+
+
+/*
+ * Find a listener which is ready for accept(). This advances the
+ * head_listener global.
+ */
+static ap_inline listen_rec *find_ready_listener(fd_set * main_fds)
+{
+ listen_rec *lr;
+
+ lr = head_listener;
+ do {
+ if (FD_ISSET(lr->fd, main_fds)) {
+ head_listener = lr->next;
+ return (lr);
+ }
+ lr = lr->next;
+ } while (lr != head_listener);
+ return NULL;
+}
+
+
+/*****************************************************************
+ * Child process main loop.
+ * The following vars are static to avoid getting clobbered by longjmp();
+ * they are really private to child_main.
+ */
+
+static int srv;
+static int csd;
+static int requests_this_child;
+static fd_set main_fds;
+
+API_EXPORT(void) ap_child_terminate(request_rec *r)
+{
+ r->connection->keepalive = 0;
+ requests_this_child = ap_max_requests_per_child = 1;
+}
+
+int ap_graceful_stop_signalled(void)
+{
+ ap_sync_scoreboard_image();
+ if (deferred_die ||
+ ap_scoreboard_image->global.running_generation != ap_my_generation) {
+ return 1;
+ }
+ return 0;
+}
+
+static void child_main(int child_num_arg)
+{
+ NET_SIZE_T clen;
+ struct sockaddr sa_server;
+ struct sockaddr sa_client;
+ listen_rec *lr;
+ pool *ptrans;
+ conn_rec *current_conn;
+
+ my_pid = getpid();
+ csd = -1;
+ my_child_num = child_num_arg;
+ requests_this_child = 0;
+
+ /* 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);
+
+ ptrans = ap_make_sub_pool(pchild);
+
+ /* needs to be done before we switch UIDs so we have permissions */
+ reopen_scoreboard(pchild);
+ SAFE_ACCEPT(accept_mutex_child_init(pchild));
+
+ if (unixd_setup_child()) {
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ 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);
+
+#ifdef OS2
+/* Stop Ctrl-C/Ctrl-Break signals going to child processes */
+ {
+ unsigned long ulTimes;
+ DosSetSignalExceptionFocus(0, &ulTimes);
+ }
+#endif
+
+ 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
+ && 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 != ap_listeners) {
+ /* more than one socket */
+ memcpy(&main_fds, &listenfds, sizeof(fd_set));
+ srv = ap_select(listenmaxfd + 1, &main_fds, NULL, NULL, NULL);
+
+ if (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 (srv <= 0)
+ continue;
+
+ lr = find_ready_listener(&main_fds);
+ if (lr == NULL)
+ continue;
+ 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);
+ csd = ap_accept(sd, &sa_client, &clen);
+ if (csd >= 0 || errno != EINTR)
+ break;
+ }
+
+ if (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;
+#ifdef TPF
+ case EINACT:
+ ap_log_error(APLOG_MARK, APLOG_EMERG, server_conf,
+ "offload device inactive");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ break;
+ default:
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, server_conf,
+ "select/accept error (%u)", errno);
+ clean_child_exit(APEXIT_CHILDFATAL);
+#else
+ default:
+ ap_log_error(APLOG_MARK, APLOG_ERR, server_conf,
+ "accept: (client socket)");
+ clean_child_exit(1);
+#endif
+ }
+ }
+
+ if (ap_graceful_stop_signalled()) {
+ clean_child_exit(0);
+ }
+ usr1_just_die = 1;
+ }
+
+ SAFE_ACCEPT(accept_mutex_off()); /* unlock after "accept" */
+
+#ifdef TPF
+ if (csd == 0) /* 0 is invalid socket for TPF */
+ continue;
+#endif
+
+ /* 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);
+
+ ap_note_cleanups_for_fd(ptrans, csd);
+
+ /* protect various fd_sets */
+#ifdef CHECK_FD_SETSIZE
+ if (csd >= FD_SETSIZE) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, NULL,
+ "[csd] filedescriptor (%u) larger than FD_SETSIZE (%u) "
+ "found, you probably need to rebuild Apache with a "
+ "larger FD_SETSIZE", csd, FD_SETSIZE);
+ continue;
+ }
+#endif
+
+ /*
+ * We now have a connection, so set it up with the appropriate
+ * socket options, file descriptors, and read/write buffers.
+ */
+
+ clen = sizeof(sa_server);
+ if (getsockname(csd, &sa_server, &clen) < 0) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, server_conf, "getsockname");
+ continue;
+ }
+
+ sock_disable_nagle(csd);
+
+ (void) ap_update_child_status(my_child_num, SERVER_BUSY_READ,
+ (request_rec *) NULL);
+
+ conn_io = ap_bcreate(ptrans, B_RDWR | B_SOCKET);
+
+#ifdef B_SFIO
+ (void) sfdisc(conn_io->sf_in, SF_POPDISC);
+ sfdisc(conn_io->sf_in, bsfio_new(conn_io->pool, conn_io));
+ sfsetbuf(conn_io->sf_in, NULL, 0);
+
+ (void) sfdisc(conn_io->sf_out, SF_POPDISC);
+ sfdisc(conn_io->sf_out, bsfio_new(conn_io->pool, conn_io));
+ sfsetbuf(conn_io->sf_out, NULL, 0);
+#endif
+
+ ap_bpushfd(conn_io, csd);
+
+ current_conn = new_connection(ptrans, server_conf, conn_io,
+ (struct sockaddr_in *) &sa_client,
+ (struct sockaddr_in *) &sa_server,
+ my_child_num);
+
+ ap_process_connection(current_conn);
+ }
+}
+
+#ifdef TPF
+static void reset_tpf_listeners(APACHE_TPF_INPUT *input_parms)
+{
+ int count;
+ listen_rec *lr;
+
+ count = 0;
+ listenmaxfd = -1;
+ FD_ZERO(&listenfds);
+ lr = ap_listeners;
+
+ for(;;) {
+ lr->fd = input_parms->listeners[count];
+ if(lr->fd >= 0) {
+ FD_SET(lr->fd, &listenfds);
+ if(lr->fd > listenmaxfd)
+ listenmaxfd = lr->fd;
+ }
+ if(lr->next == NULL)
+ break;
+ lr = lr->next;
+ count++;
+ }
+ lr->next = ap_listeners;
+ head_listener = ap_listeners;
+ close_unused_listeners();
+}
+
+#endif /* TPF */
+
+static int make_child(server_rec *s, int slot, time_t now)
+{
+ int pid;
+
+ if (slot + 1 > max_daemons_limit) {
+ max_daemons_limit = slot + 1;
+ }
+
+ if (one_process) {
+ signal(SIGHUP, just_die);
+ signal(SIGINT, just_die);
+#ifdef SIGQUIT
+ signal(SIGQUIT, SIG_DFL);
+#endif
+ signal(SIGTERM, just_die);
+ child_main(slot);
+ }
+
+ /* avoid starvation */
+ head_listener = head_listener->next;
+
+ (void) ap_update_child_status(slot, SERVER_STARTING, (request_rec *) NULL);
+
+
+#ifdef _OSD_POSIX
+ /* BS2000 requires a "special" version of fork() before a setuid() call */
+ if ((pid = os_fork(unixd_config.user_name)) == -1) {
+#elif defined(TPF)
+ if ((pid = os_fork(s, slot)) == -1) {
+#else
+ if ((pid = fork()) == -1) {
+#endif
+ ap_log_error(APLOG_MARK, APLOG_ERR, s, "fork: Unable to fork new process");
+
+ /* fork 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 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);
+ /* 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);
+ child_main(slot);
+ }
+
+ ap_scoreboard_image->parent[slot].pid = pid;
+#ifdef SCOREBOARD_FILE
+ lseek(scoreboard_fd, XtOffsetOf(scoreboard, parent[slot]), 0);
+ force_write(scoreboard_fd, &ap_scoreboard_image->parent[slot],
+ sizeof(parent_score));
+#endif
+
+ 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;
+
+ ap_sync_scoreboard_image();
+ 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) {
+#ifdef TPF
+ if(make_child(server_conf, free_slots[i], now) == -1) {
+ if(free_length == 1) {
+ shutdown_pending = 1;
+ ap_log_error(APLOG_MARK, APLOG_EMERG, server_conf,
+ "No active child processes: shutting down");
+ }
+ }
+#else
+ make_child(server_conf, free_slots[i], now);
+#endif /* TPF */
+ }
+ /* 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
+ }
+ }
+}
+
+
+/*****************************************************************
+ * 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);
+ setup_listeners(pconf);
+
+ SAFE_ACCEPT(accept_mutex_init(pconf));
+ if (!is_graceful) {
+ reinit_scoreboard(pconf);
+ }
+#ifdef SCOREBOARD_FILE
+ else {
+ ap_scoreboard_fname = ap_server_root_relative(pconf, ap_scoreboard_fname);
+ ap_note_cleanups_for_fd(pconf, scoreboard_fd);
+ }
+#endif
+
+ set_signals();
+
+ 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. */
+ ap_sync_scoreboard_image();
+ 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();
+#ifdef TPF
+ shutdown_pending = os_check_server(tpf_server_name);
+ ap_check_signals();
+ sleep(1);
+#endif /*TPF */
+ }
+
+ 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);
+ 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.
+ */
+ ++ap_my_generation;
+ ap_scoreboard_image->global.running_generation = ap_my_generation;
+ update_scoreboard_global();
+
+ 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.
+ */
+ ap_sync_scoreboard_image();
+ 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");
+ }
+ reclaim_child_processes(0); /* Not when just starting up */
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, server_conf,
+ "SIGHUP received. Attempting to restart");
+ }
+
+ /* must copy now before pconf is cleared */
+ copy_listeners(pconf);
+ if (!is_graceful) {
+ ap_restart_time = time(NULL);
+ }
+
+ return 0;
+}
+
+static void prefork_pre_command_line(pool *pcommands)
+{
+ INIT_SIGLIST();
+#ifdef AUX3
+ (void) set42sig();
+#endif
+ /* TODO: set one_process properly */ one_process = 0;
+}
+
+static void prefork_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_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_scoreboard_fname = DEFAULT_SCOREBOARD;
+ ap_lock_fname = DEFAULT_LOCKFILE;
+ ap_max_requests_per_child = DEFAULT_MAX_REQUESTS_PER_CHILD;
+ /* ZZZ Initialize the Network Address here. */
+ ap_bind_address.s_addr = htonl(INADDR_ANY);
+ ap_listeners = NULL;
+ ap_listenbacklog = DEFAULT_LISTENBACKLOG;
+ ap_extended_status = 0;
+
+ ap_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir));
+}
+
+static void prefork_post_config(pool *pconf, pool *plog, pool *ptemp, server_rec *s)
+{
+ if (ap_listeners == NULL) {
+ /* allocate a default listener */
+ listen_rec *new;
+
+ new = ap_pcalloc(pconf, sizeof(listen_rec));
+ new->local_addr.sin_family = AF_INET;
+ new->local_addr.sin_addr = ap_bind_address;
+ new->local_addr.sin_port = htons(s->port ? s->port : DEFAULT_HTTP_PORT);
+ new->fd = -1;
+ new->next = NULL;
+ ap_listeners = new;
+ }
+}
+
+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_scoreboard(cmd_parms *cmd, void *dummy, char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_scoreboard_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_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;
+}
+
+static const char *set_listenbacklog(cmd_parms *cmd, void *dummy, char *arg)
+{
+ int b;
+
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ b = atoi(arg);
+ if (b < 1) {
+ return "ListenBacklog must be > 0";
+ }
+ ap_listenbacklog = b;
+ return NULL;
+}
+
+static const char *set_listener(cmd_parms *cmd, void *dummy, char *ips)
+{
+ listen_rec *new;
+ char *ports;
+ unsigned short port;
+
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ports = strchr(ips, ':');
+ if (ports != NULL) {
+ if (ports == ips) {
+ return "Missing IP address";
+ }
+ else if (ports[1] == '\0') {
+ return "Address must end in :<port-number>";
+ }
+ *(ports++) = '\0';
+ }
+ else {
+ ports = ips;
+ }
+
+ new=ap_pcalloc(cmd->pool, sizeof(listen_rec));
+ /* ZZZ let's set this using the AP funcs. */
+ new->local_addr.sin_family = AF_INET;
+ if (ports == ips) { /* no address */
+ /* ZZZ Initialize the Network Address */
+ new->local_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+ }
+ else {
+ new->local_addr.sin_addr.s_addr = ap_get_virthost_addr(ips, NULL);
+ }
+ port = atoi(ports);
+ if (!port) {
+ return "Port must be numeric";
+ }
+ /* ZZZ change to AP funcs.*/
+ new->local_addr.sin_port = htons(port);
+ new->fd = -1; /*ZZZ change to NULL */
+ new->used = 0;
+ new->next = ap_listeners;
+ ap_listeners = new;
+ return NULL;
+}
+
+/* there are no threads in the prefork model, so the mutexes are
+ nops. */
+/* TODO: make these #defines to eliminate the function call */
+
+struct ap_thread_mutex {
+ int dummy;
+};
+
+API_EXPORT(ap_thread_mutex *) ap_thread_mutex_new(void)
+{
+ return malloc(sizeof(ap_thread_mutex));
+}
+
+API_EXPORT(void) ap_thread_mutex_lock(ap_thread_mutex *mtx)
+{
+}
+
+API_EXPORT(void) ap_thread_mutex_unlock(ap_thread_mutex *mtx)
+{
+}
+
+API_EXPORT(void) ap_thread_mutex_destroy(ap_thread_mutex *mtx)
+{
+ free(mtx);
+}
+
+
+static const command_rec prefork_cmds[] = {
+UNIX_DAEMON_COMMANDS
+{ "PidFile", set_pidfile, NULL, RSRC_CONF, TAKE1,
+ "A file for logging the server process ID"},
+{ "ScoreBoardFile", set_scoreboard, NULL, RSRC_CONF, TAKE1,
+ "A file for Apache to maintain runtime process management information"},
+{ "LockFile", set_lockfile, NULL, RSRC_CONF, TAKE1,
+ "The lockfile used when Apache needs to lock the accept() call"},
+{ "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" },
+{ "ListenBacklog", set_listenbacklog, NULL, RSRC_CONF, TAKE1,
+ "Maximum length of the queue of pending connections, as used by listen(2)" },
+{ "Listen", set_listener, NULL, RSRC_CONF, TAKE1,
+ "A port number or a numeric IP address and a port number"},
+{ NULL }
+};
+
+module MODULE_VAR_EXPORT mpm_prefork_module = {
+ STANDARD20_MODULE_STUFF,
+ prefork_pre_command_line, /* pre_command_line */
+ prefork_pre_config, /* pre_config */
+ prefork_post_config, /* 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 */
+ prefork_cmds, /* command table */
+ NULL, /* handlers */
+ NULL, /* translate_handler */
+ NULL, /* check_user_id */
+ NULL, /* check auth */
+ NULL, /* check access */
+ NULL, /* type_checker */
+ NULL, /* pre-run fixups */
+ NULL, /* logger */
+ NULL, /* header parser */
+ NULL /* post_read_request */
+};
projects / thirdparty / apache / httpd.git / commitdiff
