2 * $Id: fcgi_pm.c,v 1.36 2000/08/03 16:47:32 robs Exp $
10 #define seteuid(arg) setresuid(-1, (arg), -1)
13 int fcgi_dynamic_total_proc_count
= 0; /* number of running apps */
14 time_t fcgi_dynamic_epoch
= 0; /* last time kill_procs was
15 * invoked by process mgr */
16 time_t fcgi_dynamic_last_analyzed
= 0; /* last time calculation was
17 * made for the dynamic procs */
19 static time_t now
= 0;
21 /* Information about a process we are doing a blocking kill of. */
24 const char *lockFileName
; /* name of the lock file to lock */
26 FcgiRWLock
*lock
; /* reader/writer lock for dynamic app */
28 ServerProcess
*process
; /* process to issue SIGTERM to */
32 static BOOL bTimeToDie
= FALSE
; /* process termination flag */
33 HANDLE fcgi_event_handles
[3];
38 static int seteuid_root(void)
40 int rc
= seteuid((uid_t
)0);
42 ap_log_error(FCGI_LOG_ALERT
, fcgi_apache_main_server
,
43 "FastCGI: seteuid(0) failed");
48 static int seteuid_user(void)
50 int rc
= seteuid(ap_user_id
);
52 ap_log_error(FCGI_LOG_ALERT
, fcgi_apache_main_server
,
53 "FastCGI: seteuid(%u) failed", (unsigned)ap_user_id
);
59 static int fcgi_kill(ServerProcess
*process
, int sig
)
62 FCGIDBG2("fcgi_kill(%ld)", process
->pid
);
69 rc
= kill(process
->pid
, sig
);
76 rc
= TerminateProcess(process
->handle
, sig
);
82 /*******************************************************************************
83 * Send SIGTERM to each process in the server class, remove socket and lock
84 * file if appropriate. Currently this is only called when the PM is shutting
85 * down and thus memory isn't freed and sockets and files aren't closed.
87 static void kill_fs_procs(pool
*p
, fcgi_server
*s
)
89 ServerProcess
*proc
= s
->procs
;
92 if (s
->directive
== APP_CLASS_DYNAMIC
)
93 numChildren
= dynamicMaxClassProcs
;
95 numChildren
= s
->numProcesses
;
97 for (i
= 0; i
< numChildren
; i
++, proc
++) {
100 fcgi_kill(proc
, SIGTERM
);
104 if (proc
->handle
!= INVALID_HANDLE_VALUE
) {
106 CloseHandle(proc
->handle
);
107 proc
->handle
= INVALID_HANDLE_VALUE
;
113 /* Remove the dead lock file */
114 if (s
->directive
== APP_CLASS_DYNAMIC
) {
116 const char *lockFileName
= fcgi_util_socket_get_lock_filename(p
, s
->socket_path
);
118 if (unlink(lockFileName
) != 0) {
119 ap_log_error(FCGI_LOG_ERR
, fcgi_apache_main_server
,
120 "FastCGI: unlink() failed to remove lock file \"%s\" for (dynamic) server \"%s\"",
121 lockFileName
, s
->fs_path
);
124 fcgi_rdwr_destroy(s
->dynamic_lock
);
128 /* Remove the socket file */
129 if (s
->socket_path
!= NULL
&& s
->directive
!= APP_CLASS_EXTERNAL
) {
131 if (unlink(s
->socket_path
) != 0) {
132 ap_log_error(FCGI_LOG_ERR
, fcgi_apache_main_server
,
133 "FastCGI: unlink() failed to remove socket file \"%s\" for%s server \"%s\"",
135 (s
->directive
== APP_CLASS_DYNAMIC
) ? " (dynamic)" : "", s
->fs_path
);
138 CloseHandle((HANDLE
)s
->listenFd
);
141 fcgi_servers
= s
->next
;
144 /*******************************************************************************
145 * Bind an address to a socket and set it to listen for incoming connects.
146 * The error messages are allocated from the pool p, use temp storage.
147 * Don't forget to close the socket, if an error occurs.
149 static const char *bind_n_listen(pool
*p
, struct sockaddr
*socket_addr
,
150 int socket_addr_len
, int backlog
, int sock
)
153 if (socket_addr
->sa_family
== AF_UNIX
) {
154 /* Remove any existing socket file.. just in case */
155 unlink(((struct sockaddr_un
*)socket_addr
)->sun_path
);
161 setsockopt(sock
, SOL_SOCKET
, SO_REUSEADDR
, (char *)&flag
, sizeof(flag
));
164 /* Bind it to the socket_addr */
165 if (bind(sock
, socket_addr
, socket_addr_len
) != 0)
166 return "bind() failed";
169 /* Twiddle permissions */
170 if (socket_addr
->sa_family
== AF_UNIX
) {
171 if (chmod(((struct sockaddr_un
*)socket_addr
)->sun_path
, S_IRUSR
| S_IWUSR
))
172 return "chmod() of socket failed";
177 if (listen(sock
, backlog
) != 0)
178 return "listen() failed";
184 *----------------------------------------------------------------------
186 * dynamic_blocking_kill
188 * Block on the lock file until it is available, and then
189 * issue a kill signal to the corresponding application.
190 * Since this function is executed in the child process,
191 * _exit() is called upon completion.
194 * Pointer to the data structure containing a process id to
195 * issue a signal to and the full pathname to the lockfile
196 * that needs to be locked before the issue of the signal.
199 * Memory is allocated by the caller, but is freed by this
202 *----------------------------------------------------------------------
204 static void dynamic_blocking_kill(void *data
)
206 struct FuncData
*funcData
= (struct FuncData
*)data
;
211 ap_assert(funcData
->lockFileName
);
212 if ((lockFd
= open(funcData
->lockFileName
, O_RDWR
)) < 0) {
213 /* There is something terribly wrong here */
215 if (fcgi_wait_for_shared_write_lock(lockFd
) < 0) {
216 /* This is a major problem */
218 fcgi_kill(funcData
->process
, SIGTERM
);
221 /* exit() may flush stdio buffers inherited from the parent. */
225 FCGIDBG1("dynamic_blocking_kill()");
226 if (fcgi_wait_for_shared_write_lock(funcData
->lock
) < 0) {
227 // This is a major problem
228 FCGIDBG1("fcgi_wait_for_shared_write_lock() failed >> MAJOR PROBLEM");
231 fcgi_kill(funcData
->process
, 1);
232 fcgi_rdwr_unlock(funcData
->lock
, WRITER
);
240 *----------------------------------------------------------------------
244 * The FastCGI process manager, which runs as a separate
245 * process responsible for:
246 * - Starting all the FastCGI proceses.
247 * - Restarting any of these processes that die (indicated
249 * - Catching SIGTERM and relaying it to all the FastCGI
250 * processes before exiting.
253 * Uses global variable fcgi_servers.
261 *----------------------------------------------------------------------
264 static int caughtSigTerm
= FALSE
;
265 static int caughtSigChld
= FALSE
;
266 static int caughtSigUsr2
= FALSE
;
268 static void signal_handler(int signo
)
270 if ((signo
== SIGTERM
) || (signo
== SIGUSR1
) || (signo
== SIGHUP
)) {
271 /* SIGUSR1 & SIGHUP are sent by apache to its process group
272 * when apache get 'em. Apache follows up (1.2.x) with attacks
273 * on each of its child processes, but we've got the KillMgr
274 * sitting between us so we never see the KILL. The main loop
275 * in ProcMgr also checks to see if the KillMgr has terminated,
276 * and if it has, we handl it as if we should shutdown too. */
277 caughtSigTerm
= TRUE
;
278 } else if(signo
== SIGCHLD
) {
279 caughtSigChld
= TRUE
;
280 } else if(signo
== SIGALRM
) {
281 caughtSigUsr2
= TRUE
;
287 *----------------------------------------------------------------------
289 * spawn_fs_process --
291 * Fork and exec the specified fcgi process.
294 * 0 for successful fork, -1 for failed fork.
296 * In case the child fails before or in the exec, the child
297 * obtains the error log by calling getErrLog, logs
298 * the error, and exits with exit status = errno of
299 * the failed system call.
302 * Child process created.
304 *----------------------------------------------------------------------
307 static pid_t
spawn_fs_process(fcgi_server
*fs
, ServerProcess
*process
)
313 char *dnEnd
, *failedSysCall
;
320 /* We're the child. We're gonna exec() so pools don't matter. */
322 dnEnd
= strrchr(fs
->fs_path
, '/');
326 dirName
= ap_pcalloc(fcgi_config_pool
, dnEnd
- fs
->fs_path
+ 1);
327 dirName
= memcpy(dirName
, fs
->fs_path
, dnEnd
- fs
->fs_path
);
329 if (chdir(dirName
) < 0) {
330 failedSysCall
= "chdir()";
331 goto FailedSystemCallExit
;
335 /* OS/2 dosen't support nice() */
336 if (fs
->processPriority
!= 0) {
337 if (nice(fs
->processPriority
) == -1) {
338 failedSysCall
= "nice()";
339 goto FailedSystemCallExit
;
344 /* Open the listenFd on spec'd fd */
345 if (fs
->listenFd
!= FCGI_LISTENSOCK_FILENO
)
346 dup2(fs
->listenFd
, FCGI_LISTENSOCK_FILENO
);
348 /* Close all other open fds, except stdout/stderr. Leave these two open so
349 * FastCGI applications don't have to find and fix ALL 3rd party libs that
350 * write to stdout/stderr inadvertantly. For now, just leave 'em open to the
351 * main server error_log - @@@ provide a directive control where this goes.
353 ap_error_log2stderr(fcgi_apache_main_server
);
354 dup2(STDERR_FILENO
, STDOUT_FILENO
);
355 for (i
= 0; i
< FCGI_MAX_FD
; i
++) {
356 if (i
!= FCGI_LISTENSOCK_FILENO
&& i
!= STDERR_FILENO
&& i
!= STDOUT_FILENO
) {
361 /* Ignore SIGPIPE by default rather than terminate. The fs SHOULD
362 * install its own handler. */
363 signal(SIGPIPE
, SIG_IGN
);
365 if (fcgi_suexec
!= NULL
) {
366 char *shortName
= strrchr(fs
->fs_path
, '/') + 1;
368 /* Relinquish our root real uid powers */
373 execle(fcgi_suexec
, fcgi_suexec
, fs
->username
, fs
->group
, shortName
, NULL
, fs
->envp
);
374 } while (errno
== EINTR
);
378 execle(fs
->fs_path
, fs
->fs_path
, NULL
, fs
->envp
);
379 } while (errno
== EINTR
);
382 failedSysCall
= "execle()";
384 FailedSystemCallExit
:
385 fprintf(stderr
, "FastCGI: can't start server \"%s\" (pid %ld), %s failed: %s\n",
386 fs
->fs_path
, (long) getpid(), failedSysCall
, strerror(errno
));
389 /* avoid an irrelevant compiler warning */
394 /* Adapted from Apache's util_script.c ap_call_exec() */
395 char *interpreter
= NULL
;
397 char *exename
= NULL
;
399 char *quoted_filename
;
401 char *pEnvBlock
, *pNext
;
406 file_type_e fileType
;
409 PROCESS_INFORMATION pi
;
414 HANDLE listen_handle
, mutex
;
415 char * mutex_string
= NULL
;
417 pool
* tp
= ap_make_sub_pool(fcgi_config_pool
);
421 SECURITY_ATTRIBUTES sa
;
423 sa
.nLength
= sizeof(sa
);
424 sa
.lpSecurityDescriptor
= NULL
;
425 sa
.bInheritHandle
= TRUE
;
427 listen_handle
= CreateNamedPipe(fs
->socket_path
, PIPE_ACCESS_DUPLEX
,
428 PIPE_TYPE_BYTE
| PIPE_READMODE_BYTE
| PIPE_WAIT
,
429 PIPE_UNLIMITED_INSTANCES
, 4096,4096,0, &sa
);
430 if (listen_handle
== INVALID_HANDLE_VALUE
)
432 ap_log_error(FCGI_LOG_CRIT
, fcgi_apache_main_server
,
433 "FastCGI: can't exec server \"%s\", CreateNamedPipe() failed", fs
->fs_path
);
437 // This mutex is not really necessary, but for compatibility with
438 // the existing library, we need it.
440 mutex
= ap_create_mutex(NULL
);
443 ap_log_error(FCGI_LOG_CRIT
, fcgi_apache_main_server
,
444 "FastCGI: can't exec server \"%s\", ap_create_mutex() failed", fs
->fs_path
);
445 CloseHandle(listen_handle
);
449 SetHandleInformation(mutex
, HANDLE_FLAG_INHERIT
, TRUE
);
451 mutex_string
= ap_psprintf(tp
, "_FCGI_MUTEX_=%ld", mutex
);
455 listen_handle
= (HANDLE
) fs
->listenFd
;
458 memset(&si
, 0, sizeof(si
));
459 memset(&pi
, 0, sizeof(pi
));
460 memset(&r
, 0, sizeof(r
));
462 // Can up a fake request to pass to ap_get_win32_interpreter()
463 r
.per_dir_config
= fcgi_apache_main_server
->lookup_defaults
;
464 r
.server
= fcgi_apache_main_server
;
465 r
.filename
= (char *) fs
->fs_path
;
468 fileType
= ap_get_win32_interpreter(&r
, &interpreter
);
470 if (fileType
== eFileTypeUNKNOWN
) {
471 ap_log_error(APLOG_MARK
, APLOG_ERR
|APLOG_NOERRNO
, fcgi_apache_main_server
,
472 "FastCGI: %s is not executable; ensure interpreted scripts have "
473 "\"#!\" as their first line",
480 * We have the interpreter (if there is one) and we have
481 * the arguments (if there are any).
482 * Build the command string to pass to CreateProcess.
484 quoted_filename
= ap_pstrcat(tp
, "\"", fs
->fs_path
, "\"", NULL
);
485 if (interpreter
&& *interpreter
) {
486 pCommand
= ap_pstrcat(tp
, interpreter
, " ", quoted_filename
, NULL
);
489 pCommand
= quoted_filename
;
493 * Make child process use hPipeOutputWrite as standard out,
494 * and make sure it does not show on screen.
497 si
.dwFlags
= STARTF_USESHOWWINDOW
| STARTF_USESTDHANDLES
;
498 si
.wShowWindow
= SW_HIDE
;
499 si
.hStdInput
= listen_handle
;
501 // XXX These should be open to the error_log
502 si
.hStdOutput
= INVALID_HANDLE_VALUE
;
503 si
.hStdError
= INVALID_HANDLE_VALUE
;
506 * Win32's CreateProcess call requires that the environment
507 * be passed in an environment block, a null terminated block of
508 * null terminated strings.
512 while (fs
->envp
[i
]) {
513 iEnvBlockLen
+= strlen(fs
->envp
[i
]) + 1;
519 iEnvBlockLen
+= strlen(mutex_string
) + 1;
522 pEnvBlock
= (char *) ap_pcalloc(tp
, iEnvBlockLen
);
526 while (fs
->envp
[i
]) {
527 strcpy(pNext
, fs
->envp
[i
]);
528 pNext
= pNext
+ strlen(pNext
) + 1;
534 strcpy(pNext
, mutex_string
);
537 if (CreateProcess(NULL
, pCommand
, NULL
, NULL
, TRUE
,
540 ap_make_dirstr_parent(tp
, fs
->fs_path
),
542 if (fileType
== eFileTypeEXE16
) {
543 /* Hack to get 16-bit CGI's working. It works for all the
544 * standard modules shipped with Apache. pi.dwProcessId is 0
545 * for 16-bit CGIs and all the Unix specific code that calls
546 * ap_call_exec interprets this as a failure case. And we can't
547 * use -1 either because it is mapped to 0 by the caller.
552 pid
= pi
.dwProcessId
;
553 process
->handle
= pi
.hProcess
;
554 CloseHandle(pi
.hThread
);
558 // We don't need these anymore..
561 CloseHandle(listen_handle
);
573 static void reduce_priveleges(void)
581 /* Get username if passed as a uid */
582 if (ap_user_name
[0] == '#') {
583 uid_t uid
= atoi(&ap_user_name
[1]);
584 struct passwd
*ent
= getpwuid(uid
);
587 ap_log_error(FCGI_LOG_ALERT
, fcgi_apache_main_server
,
588 "FastCGI: process manager exiting, getpwuid(%u) couldn't determine user name, "
589 "you probably need to modify the User directive", (unsigned)uid
);
598 if (setgid(ap_group_id
) == -1) {
599 ap_log_error(FCGI_LOG_ALERT
, fcgi_apache_main_server
,
600 "FastCGI: process manager exiting, setgid(%u) failed", (unsigned)ap_group_id
);
604 /* See Apache PR2580. Until its resolved, do it the same way CGI is done.. */
606 /* Initialize supplementary groups */
607 if (initgroups(name
, ap_group_id
) == -1) {
608 ap_log_error(FCGI_LOG_ALERT
, fcgi_apache_main_server
,
609 "FastCGI: process manager exiting, initgroups(%s,%u) failed",
610 name
, (unsigned)ap_group_id
);
617 if (seteuid_user() == -1) {
618 ap_log_error(FCGI_LOG_ALERT_NOERRNO
, fcgi_apache_main_server
,
619 "FastCGI: process manager exiting, failed to reduce priveleges");
624 if (setuid(ap_user_id
) == -1) {
625 ap_log_error(FCGI_LOG_ALERT
, fcgi_apache_main_server
,
626 "FastCGI: process manager exiting, setuid(%u) failed", (unsigned)ap_user_id
);
633 * Change the name of this process - best we can easily.
635 static void change_process_name(const char * const name
)
637 strncpy(ap_server_argv0
, name
, strlen(ap_server_argv0
));
641 static void schedule_start(fcgi_server
*s
, int proc
)
643 /* If we've started one recently, don't register another */
644 time_t time_passed
= now
- s
->restartTime
;
646 if ((s
->procs
[proc
].pid
&& time_passed
< (int) s
->restartDelay
)
647 || (s
->procs
[proc
].pid
== 0 && time_passed
< (int) s
->initStartDelay
))
649 FCGIDBG6("ignore_job: slot=%d, pid=%ld, time_passed=%ld, initStartDelay=%ld, restartDelay=%ld", proc
, s
->procs
[proc
].pid
, time_passed
, s
->initStartDelay
, s
->restartDelay
);
653 FCGIDBG3("scheduling_start: %s (%d)", s
->fs_path
, proc
);
654 s
->procs
[proc
].state
= STATE_NEEDS_STARTING
;
655 if (proc
== (int)dynamicMaxClassProcs
- 1) {
656 ap_log_error(FCGI_LOG_WARN_NOERRNO
, fcgi_apache_main_server
,
657 "FastCGI: scheduled the %sstart of the last (dynamic) server "
658 "\"%s\" process: reached dynamicMaxClassProcs (%d)",
659 s
->procs
[proc
].pid
? "re" : "", s
->fs_path
, dynamicMaxClassProcs
);
664 *----------------------------------------------------------------------
668 * Removes the records written by request handlers and decodes them.
669 * We also update the data structures to reflect the changes.
671 *----------------------------------------------------------------------
674 static void dynamic_read_msgs(int read_ready
)
680 static int buflen
= 0;
681 static char buf
[FCGI_MSGS_BUFSIZE
+ 1];
682 char *ptr1
, *ptr2
, opcode
;
683 char execName
[FCGI_MAXPATH
+ 1];
684 char user
[MAX_USER_NAME_LEN
+ 2];
685 char group
[MAX_GID_CHAR_LEN
+ 1];
686 unsigned long q_usec
= 0UL, req_usec
= 0UL;
688 fcgi_pm_job
*joblist
= NULL
;
689 fcgi_pm_job
*cjob
= NULL
;
695 user
[MAX_USER_NAME_LEN
+ 1] = group
[MAX_GID_CHAR_LEN
] = '\0';
699 * To prevent the idle application from running indefinitely, we
700 * check the timer and if it is expired, we recompute the values
701 * for each running application class. Then, when REQ_COMPLETE
702 * message is recieved, only updates are made to the data structures.
704 if (fcgi_dynamic_last_analyzed
== 0) {
705 fcgi_dynamic_last_analyzed
= now
;
707 if ((now
- fcgi_dynamic_last_analyzed
) >= (int)dynamicUpdateInterval
) {
708 for (s
= fcgi_servers
; s
!= NULL
; s
= s
->next
) {
709 if (s
->directive
!= APP_CLASS_DYNAMIC
)
711 /* XXX what does this adjustment do? */
712 fcgi_dynamic_last_analyzed
+= (((long)(now
-fcgi_dynamic_last_analyzed
)/dynamicUpdateInterval
)*dynamicUpdateInterval
);
713 s
->smoothConnTime
= (unsigned long) ((1.0-dynamicGain
)*s
->smoothConnTime
+ dynamicGain
*s
->totalConnTime
);
714 s
->totalConnTime
= 0UL;
715 s
->totalQueueTime
= 0UL;
719 if (read_ready
<= 0) {
724 rc
= read(fcgi_pm_pipe
[0], (void *)(buf
+ buflen
), FCGI_MSGS_BUFSIZE
- buflen
);
726 if (!caughtSigTerm
) {
727 ap_log_error(FCGI_LOG_ALERT
, fcgi_apache_main_server
,
728 "FastCGI: read() from pipe failed (%d)", rc
);
730 ap_log_error(FCGI_LOG_ALERT
, fcgi_apache_main_server
,
731 "FastCGI: the PM is shutting down, Apache seems to have disappeared - bye");
732 caughtSigTerm
= TRUE
;
740 if (ap_acquire_mutex(fcgi_dynamic_mbox_mutex
) != MULTI_OK
) {
741 ap_log_error(FCGI_LOG_ALERT
, fcgi_apache_main_server
,
742 "FastCGI: Failed to aquire the dynamic mbox mutex!");
745 joblist
= fcgi_dynamic_mbox
;
746 fcgi_dynamic_mbox
= NULL
;
748 if (! ap_release_mutex(fcgi_dynamic_mbox_mutex
)) {
749 ap_log_error(FCGI_LOG_ALERT
, fcgi_apache_main_server
,
750 "FastCGI: Failed to release the dynamic mbox mutex!");
756 tp
= ap_make_sub_pool(fcgi_config_pool
);
759 for (ptr1
= buf
; ptr1
; ptr1
= ptr2
) {
762 ptr2
= strchr(ptr1
, '*');
774 if (sscanf(ptr1
, "%c %s %16s %15s",
775 &opcode
, execName
, user
, group
) != 4)
781 if (sscanf(ptr1
, "%c %s %16s %15s",
782 &opcode
, execName
, user
, group
) != 4)
788 if (sscanf(ptr1
, "%c %s %16s %15s %lu %lu",
789 &opcode
, execName
, user
, group
, &q_usec
, &req_usec
) != 6)
800 ap_log_error(FCGI_LOG_ERR_NOERRNO
, fcgi_apache_main_server
,
801 "FastCGI: bogus message, sscanf() failed: \"%s\"", ptr1
);
805 /* Update data structures for processing */
806 while (cjob
!= NULL
) {
807 joblist
= cjob
->next
;
808 FCGIDBG7("read_job: %c %s %s %s %lu %lu", cjob
->id
, cjob
->fs_path
, cjob
->user
, cjob
->group
, cjob
->qsec
, cjob
->start_time
);
812 s
= fcgi_util_fs_get(execName
, user
, group
);
814 s
= fcgi_util_fs_get(cjob
->fs_path
, cjob
->user
, cjob
->group
);
818 if (s
==NULL
&& opcode
!= REQ_COMPLETE
)
820 if (s
==NULL
&& cjob
->id
!= REQ_COMPLETE
)
825 const char *err
, *lockPath
;
828 /* Create a perm subpool to hold the new server data,
829 * we can destroy it if something doesn't pan out */
830 sp
= ap_make_sub_pool(fcgi_config_pool
);
832 /* Create a new "dynamic" server */
833 s
= fcgi_util_fs_new(sp
);
834 s
->directive
= APP_CLASS_DYNAMIC
;
835 s
->restartDelay
= dynamicRestartDelay
;
836 s
->listenQueueDepth
= dynamicListenQueueDepth
;
837 s
->initStartDelay
= dynamicInitStartDelay
;
838 s
->envp
= dynamicEnvp
;
840 s
->fs_path
= ap_pstrdup(sp
, cjob
->fs_path
);
842 s
->fs_path
= ap_pstrdup(sp
, execName
);
844 ap_getparents(s
->fs_path
);
845 ap_no2slash(s
->fs_path
);
846 s
->procs
= fcgi_util_fs_create_procs(sp
, dynamicMaxClassProcs
);
849 /* Create socket file's path */
850 s
->socket_path
= fcgi_util_socket_hash_filename(tp
, execName
, user
, group
);
851 s
->socket_path
= fcgi_util_socket_make_path_absolute(sp
, s
->socket_path
, 1);
853 /* Create sockaddr, prealloc it so it won't get created in tp */
854 s
->socket_addr
= ap_pcalloc(sp
, sizeof(struct sockaddr_un
));
855 err
= fcgi_util_socket_make_domain_addr(tp
, (struct sockaddr_un
**)&s
->socket_addr
,
856 &s
->socket_addr_len
, s
->socket_path
);
858 ap_log_error(FCGI_LOG_CRIT
, fcgi_apache_main_server
,
859 "FastCGI: can't create (dynamic) server \"%s\": %s", execName
, err
);
863 /* Create the socket */
864 if ((s
->listenFd
= ap_psocket(sp
, s
->socket_addr
->sa_family
, SOCK_STREAM
, 0)) < 0) {
865 ap_log_error(FCGI_LOG_CRIT
, fcgi_apache_main_server
,
866 "FastCGI: can't create (dynamic) server \"%s\": socket() failed", execName
);
870 /* bind() and listen() */
871 err
= bind_n_listen(tp
, s
->socket_addr
, s
->socket_addr_len
,
872 s
->listenQueueDepth
, s
->listenFd
);
874 ap_log_error(FCGI_LOG_CRIT
, fcgi_apache_main_server
,
875 "FastCGI: can't create (dynamic) server \"%s\": %s", execName
, err
);
879 /* Create the lock file */
880 lockPath
= fcgi_util_socket_get_lock_filename(tp
, s
->socket_path
);
881 fd
= ap_popenf(tp
, lockPath
,
882 O_WRONLY
| O_CREAT
| O_TRUNC
, S_IRUSR
| S_IWUSR
);
884 ap_log_error(FCGI_LOG_CRIT
, fcgi_apache_main_server
,
885 "FastCGI: can't create (dynamic) server \"%s\": can't open lock file \"%s\": popenf() failed",
891 /* If suexec is being used, config user/group info */
893 if (user
[0] == '~') {
894 /* its a user dir uri, the rest is a username, not a uid */
895 struct passwd
*pw
= getpwnam(&user
[1]);
898 ap_log_error(FCGI_LOG_CRIT
, fcgi_apache_main_server
,
899 "FastCGI: can't create (dynamic) server \"%s\": can't get uid/gid for suexec: getpwnam(%s) failed",
904 s
->user
= ap_pstrdup(sp
, user
);
905 s
->username
= s
->user
;
908 s
->group
= ap_psprintf(sp
, "%ld", (long)s
->gid
);
913 s
->uid
= (uid_t
)atol(user
);
914 pw
= getpwuid(s
->uid
);
916 ap_log_error(FCGI_LOG_CRIT
, fcgi_apache_main_server
,
917 "FastCGI: can't create (dynamic) server \"%s\": can't get uid/gid for suexec: getwpuid(%ld) failed",
918 execName
, (long)s
->uid
);
921 s
->user
= ap_pstrdup(sp
, user
);
922 s
->username
= ap_pstrdup(sp
, pw
->pw_name
);
924 s
->gid
= (gid_t
)atol(group
);
925 s
->group
= ap_pstrdup(sp
, group
);
929 /* Create socket file's path */
930 s
->socket_path
= fcgi_util_socket_hash_filename(tp
, cjob
->fs_path
, cjob
->user
, cjob
->group
);
931 s
->socket_path
= fcgi_util_socket_make_path_absolute(sp
, s
->socket_path
, 1);
934 /* Create the application lock */
935 if ((s
->dynamic_lock
= fcgi_rdwr_create()) == NULL
) {
936 ap_log_error(FCGI_LOG_CRIT
, fcgi_apache_main_server
,
937 "FastCGI: can;t create (dynamic) server \"%s\": fcgi_rdwr_create() failed",
942 // Lock it until the first process is started
943 fcgi_rdwr_lock(s
->dynamic_lock
, WRITER
);
950 if (opcode
== PLEASE_START
) {
952 if(cjob
->id
==PLEASE_START
) {
954 if (dynamicAutoUpdate
) {
955 /* Check to see if the binary has changed. If so,
956 * kill the FCGI application processes, and
963 if ((stat(execName
, &stbuf
)==0) &&
965 if ((stat(cjob
->fs_path
, &stbuf
)==0) &&
967 (stbuf
.st_mtime
> s
->restartTime
)) {
968 /* kill old server(s) */
969 for (i
= 0; i
< dynamicMaxClassProcs
; i
++) {
970 if (s
->procs
[i
].pid
> 0) {
971 fcgi_kill(&s
->procs
[i
], SIGTERM
);
975 ap_log_error(FCGI_LOG_WARN_NOERRNO
, fcgi_apache_main_server
,
976 "FastCGI: restarting server \"%s\" processes, newer version found",
984 /* If dynamicAutoRestart, don't mark any new processes
985 * for starting because we probably got the
986 * PLEASE_START due to dynamicAutoUpdate and the ProcMgr
987 * will be restarting all of those we just killed.
989 if (dynamicAutoRestart
)
992 /* we've been asked to start a process--only start
993 * it if we're not already running at least one
998 for (i
= 0; i
< dynamicMaxClassProcs
; i
++) {
999 if (s
->procs
[i
].state
== STATE_STARTED
)
1002 /* if already running, don't start another one */
1003 if (i
< dynamicMaxClassProcs
) {
1020 if ((fcgi_dynamic_total_proc_count
+ 1) > (int) dynamicMaxProcs
) {
1022 * Extra instances should have been
1023 * terminated beforehand, probably need
1024 * to increase ProcessSlack parameter
1026 ap_log_error(FCGI_LOG_WARN_NOERRNO
, fcgi_apache_main_server
,
1027 "FastCGI: can't schedule the start of another (dynamic) server \"%s\" process: "
1028 "exceeded dynamicMaxProcs (%d)", s
->fs_path
, dynamicMaxProcs
);
1032 /* find next free slot */
1033 for (i
= 0; i
< dynamicMaxClassProcs
; i
++)
1035 if (s
->procs
[i
].state
== STATE_NEEDS_STARTING
)
1037 FCGIDBG2("ignore_job: slot (%d) is already scheduled for starting", i
);
1040 else if (s
->procs
[i
].state
== STATE_STARTED
)
1045 schedule_start(s
, i
);
1050 if (i
>= dynamicMaxClassProcs
) {
1051 FCGIDBG1("ignore_job: slots are max'd");
1056 /* only record stats if we have a structure */
1059 s
->totalConnTime
+= req_usec
;
1060 s
->totalQueueTime
+= q_usec
;
1062 s
->totalConnTime
+= cjob
->start_time
;
1063 s
->totalQueueTime
+= cjob
->qsec
;
1072 /* Cleanup job data */
1073 free(cjob
->fs_path
);
1083 ap_destroy_pool(sp
);
1086 free(cjob
->fs_path
);
1094 ap_log_error(FCGI_LOG_ERR_NOERRNO
, fcgi_apache_main_server
,
1095 "FastCGI: really bogus message: \"%s\"", ptr1
);
1096 ptr1
+= strlen(buf
);
1099 buflen
-= ptr1
- buf
;
1101 memmove(buf
, ptr1
, buflen
);
1105 ap_destroy_pool(tp
);
1109 *----------------------------------------------------------------------
1111 * dynamic_kill_idle_fs_procs
1113 * Implement a kill policy for the dynamic FastCGI applications.
1114 * We also update the data structures to reflect the changes.
1117 * Processes are marked for deletion possibly killed.
1119 *----------------------------------------------------------------------
1121 static void dynamic_kill_idle_fs_procs(void)
1124 struct FuncData
*funcData
= NULL
;
1125 unsigned long connTime
; /* server's smoothed running time, or
1126 * if that's 0, the current total */
1127 unsigned long totalTime
; /* maximum number of microseconds that all
1128 * of a server's running processes together
1129 * could have spent running since the
1131 double loadFactor
; /* percentage, 0-100, of totalTime that
1132 * the processes actually used */
1133 unsigned int i
, victims
= 0;
1135 const char *lockFileName
;
1139 pool
*tp
= ap_make_sub_pool(fcgi_config_pool
);
1141 /* pass 1 - locate and mark all victims */
1142 for(s
=fcgi_servers
; s
!=NULL
; s
=s
->next
) {
1143 /* Only kill dynamic apps */
1144 if (s
->directive
!= APP_CLASS_DYNAMIC
)
1147 /* If the number of non-victims is less than or equal to
1148 the minimum that may be running without being killed off,
1149 don't select any more victims. */
1150 if ((fcgi_dynamic_total_proc_count
- victims
) <= (int) dynamicMinProcs
) {
1154 connTime
= s
->smoothConnTime
? s
->smoothConnTime
: s
->totalConnTime
;
1155 totalTime
= (s
->numProcesses
)*(now
- fcgi_dynamic_epoch
)*1000000 + 1;
1157 /* XXX producing a heavy load with one client, I haven't been
1158 able to achieve a loadFactor greater than 0.5. Perhaps this
1159 should be scaled up by another order of magnitude or two. */
1160 loadFactor
= connTime
/totalTime
*100.0;
1162 if ((s
->numProcesses
> 1
1163 && s
->numProcesses
/(s
->numProcesses
- 1)*loadFactor
< dynamicThreshholdN
)
1164 || (s
->numProcesses
== 1 && loadFactor
< dynamicThreshhold1
))
1168 for (i
= 0; !got_one
&& i
< dynamicMaxClassProcs
; ++i
) {
1169 if (s
->procs
[i
].state
== STATE_NEEDS_STARTING
) {
1170 s
->procs
[i
].state
= STATE_READY
;
1173 else if (s
->procs
[i
].state
== STATE_VICTIM
|| s
->procs
[i
].state
== STATE_KILL
) {
1178 for (i
= 0; !got_one
&& i
< dynamicMaxClassProcs
; ++i
) {
1179 if (s
->procs
[i
].state
== STATE_STARTED
) {
1180 s
->procs
[i
].state
= STATE_KILL
;
1181 ap_log_error(FCGI_LOG_WARN_NOERRNO
, fcgi_apache_main_server
,
1182 "FastCGI: (dynamic) server \"%s\" (pid %ld) termination scheduled",
1183 s
->fs_path
, s
->procs
[i
].pid
);
1191 /* pass 2 - kill procs off */
1192 for(s
=fcgi_servers
; s
!=NULL
; s
=s
->next
) {
1193 /* Only kill dynamic apps */
1194 if (s
->directive
!= APP_CLASS_DYNAMIC
)
1197 for(i
= 0; i
< dynamicMaxClassProcs
; i
++) {
1198 if (s
->procs
[i
].state
== STATE_KILL
) {
1200 lockFileName
= fcgi_util_socket_get_lock_filename(tp
, s
->socket_path
);
1201 if ((lockFd
= ap_popenf(tp
, lockFileName
, O_RDWR
, 0))<0) {
1203 * If we need to kill an application and the
1204 * corresponding lock file does not exist, then
1205 * that means we are in big trouble here
1207 /*@@@ this should be logged, but since all the lock
1208 * file stuff will be tossed, I'll leave it now */
1209 ap_pclosef(tp
, lockFd
);
1213 if (fcgi_get_exclusive_write_lock_no_wait(lockFd
) < 0) {
1215 if (fcgi_get_exclusive_write_lock_no_wait(s
->dynamic_lock
) < 0) {
1217 FCGIDBG2("fcgi_get_exclusive_write_lock_no_wait() failed (%ld)", GetLastError());
1219 * Unable to lock the lockfile, indicative
1220 * of WS performing operation with the given
1221 * application class. The simplest solution
1222 * is to spawn off another process and block
1223 * on lock to kill it. This is under assumptions
1224 * that fork() is not very costly and this
1225 * situation occurs very rarely, which it should
1228 funcData
= ap_pcalloc(tp
, sizeof(struct FuncData
));
1229 funcData
->lockFileName
= lockFileName
;
1231 funcData
= malloc(sizeof(struct FuncData
));
1232 funcData
->lock
= s
->dynamic_lock
;
1234 funcData
->process
= &s
->procs
[i
];
1237 if((pid
=fork())<0) {
1238 /*@@@ this should be logged, but since all the lock
1239 * file stuff will be tossed, I'll leave it now */
1240 ap_pclosef(tp
, lockFd
);
1245 /* rename the process for ps - best we can easily */
1246 change_process_name("fcgiBlkKill");
1248 dynamic_blocking_kill(funcData
);
1251 s
->procs
[i
].state
= STATE_VICTIM
;
1252 ap_pclosef(tp
, lockFd
);
1255 CreateThread(NULL
, 0, (LPTHREAD_START_ROUTINE
) dynamic_blocking_kill
, (LPVOID
) funcData
, 0, NULL
);
1256 s
->procs
[i
].state
= STATE_VICTIM
;
1260 FCGIDBG1("fcgi_get_exclusive_write_lock_no_wait() succeeded");
1261 s
->procs
[i
].state
= STATE_VICTIM
;
1263 fcgi_kill(&s
->procs
[i
], SIGTERM
);
1264 ap_pclosef(tp
, lockFd
);
1266 fcgi_kill(&s
->procs
[i
], 1);
1267 fcgi_rdwr_unlock(s
->dynamic_lock
, WRITER
);
1273 ap_destroy_pool(tp
);
1278 // This is a little bogus, there's gotta be a better way to do this
1279 // Can we use WaitForMultipleObjects()
1280 #define FCGI_PROC_WAIT_TIME 100
1282 void child_wait_thread(void *dummy
) {
1284 DWORD dwRet
= WAIT_TIMEOUT
;
1289 while (!bTimeToDie
) {
1292 for (s
= fcgi_servers
; s
!= NULL
; s
= s
->next
) {
1293 if (s
->directive
== APP_CLASS_EXTERNAL
|| s
->listenFd
< 0) {
1296 if (s
->directive
== APP_CLASS_DYNAMIC
) {
1297 numChildren
= dynamicMaxClassProcs
;
1300 numChildren
= s
->numProcesses
;
1303 for (i
=0; i
< numChildren
; i
++) {
1304 if (s
->procs
[i
].handle
!= INVALID_HANDLE_VALUE
) {
1305 /* timeout is currently set for 100 miliecond */
1306 /* it may need t longer or user customizable */
1307 dwRet
= WaitForSingleObject(s
->procs
[i
].handle
, FCGI_PROC_WAIT_TIME
);
1311 if (dwRet
!= WAIT_TIMEOUT
&& dwRet
!= WAIT_FAILED
) {
1312 /* a child fs has died */
1313 /* mark the child as dead */
1315 if (s
->directive
== APP_CLASS_STANDARD
) {
1316 /* restart static app */
1317 s
->procs
[i
].state
= STATE_NEEDS_STARTING
;
1322 fcgi_dynamic_total_proc_count
--;
1323 FCGIDBG2("-- fcgi_dynamic_total_proc_count=%d", fcgi_dynamic_total_proc_count
);
1325 if (s
->procs
[i
].state
== STATE_VICTIM
) {
1326 s
->procs
[i
].state
= STATE_KILLED
;
1329 /* dynamic app shouldn't have died or dynamicAutoUpdate killed it*/
1332 if (dynamicAutoRestart
) {
1333 s
->procs
[i
].state
= STATE_NEEDS_STARTING
;
1336 s
->procs
[i
].state
= STATE_READY
;
1341 ap_log_error(FCGI_LOG_WARN_NOERRNO
, fcgi_apache_main_server
,
1342 "FastCGI:%s server \"%s\" (pid %d) terminated",
1343 (s
->directive
== APP_CLASS_DYNAMIC
) ? " (dynamic)" : "",
1344 s
->fs_path
, s
->procs
[i
].pid
);
1346 CloseHandle(s
->procs
[i
].handle
);
1347 s
->procs
[i
].handle
= INVALID_HANDLE_VALUE
;
1348 s
->procs
[i
].pid
= -1;
1350 /* wake up the main thread */
1351 SetEvent(fcgi_event_handles
[WAKE_EVENT
]);
1356 Sleep(waited
? 0 : FCGI_PROC_WAIT_TIME
);
1362 static void setup_signals(void)
1365 struct sigaction sa
;
1369 sigaddset(&mask
, SIGUSR2
);
1370 sigprocmask(SIG_BLOCK
, &mask
, NULL
);
1372 /* Setup handlers */
1374 sa
.sa_handler
= signal_handler
;
1375 sigemptyset(&sa
.sa_mask
);
1378 if (sigaction(SIGTERM
, &sa
, NULL
) < 0) {
1379 ap_log_error(FCGI_LOG_ALERT
, fcgi_apache_main_server
,
1380 "sigaction(SIGTERM) failed");
1383 if (sigaction(SIGHUP
, &sa
, NULL
) < 0) {
1384 ap_log_error(FCGI_LOG_ALERT
, fcgi_apache_main_server
,
1385 "sigaction(SIGHUP) failed");
1387 /* httpd graceful restart */
1388 if (sigaction(SIGUSR1
, &sa
, NULL
) < 0) {
1389 ap_log_error(FCGI_LOG_ALERT
, fcgi_apache_main_server
,
1390 "sigaction(SIGUSR1) failed");
1392 /* read messages from request handlers - kill interval expired */
1393 if (sigaction(SIGALRM
, &sa
, NULL
) < 0) {
1394 ap_log_error(FCGI_LOG_ALERT
, fcgi_apache_main_server
,
1395 "sigaction(SIGALRM) failed");
1397 if (sigaction(SIGCHLD
, &sa
, NULL
) < 0) {
1398 ap_log_error(FCGI_LOG_ALERT
, fcgi_apache_main_server
,
1399 "sigaction(SIGCHLD) failed");
1405 int fcgi_pm_main(void *dummy
, child_info
*info
)
1407 void fcgi_pm_main(void *dummy
)
1420 HANDLE wait_thread
= INVALID_HANDLE_VALUE
;
1422 int callWaitPid
, callDynamicProcs
;
1426 // Add SystemRoot to the dyanmic environment
1427 char ** envp
= dynamicEnvp
;
1428 for (i
= 0; *envp
; ++i
) {
1431 fcgi_config_set_env_var(fcgi_config_pool
, dynamicEnvp
, &i
, "SystemRoot");
1434 reduce_priveleges();
1436 close(fcgi_pm_pipe
[1]);
1437 change_process_name("fcgi-pm");
1441 ap_log_error(FCGI_LOG_NOTICE_NOERRNO
, fcgi_apache_main_server
,
1442 "FastCGI: suEXEC mechanism enabled (wrapper: %s)", fcgi_suexec
);
1446 /* Initialize AppClass */
1447 tp
= ap_make_sub_pool(fcgi_config_pool
);
1448 for(s
= fcgi_servers
; s
!= NULL
; s
= s
->next
) {
1449 if (s
->directive
== APP_CLASS_EXTERNAL
)
1460 /* Create the socket */
1461 s
->listenFd
= ap_psocket(fcgi_config_pool
, s
->socket_addr
->sa_family
, SOCK_STREAM
, 0);
1462 if (s
->listenFd
< 0) {
1463 ap_log_error(FCGI_LOG_CRIT
, fcgi_apache_main_server
,
1464 "FastCGI: server \"%s\" disabled, socket() failed", s
->fs_path
);
1468 /* bind() and listen() */
1469 err
= bind_n_listen(tp
, s
->socket_addr
, s
->socket_addr_len
,
1470 s
->listenQueueDepth
, s
->listenFd
);
1472 ap_log_error(FCGI_LOG_CRIT
, fcgi_apache_main_server
,
1473 "FastCGI: server \"%s\" disabled: %s",
1475 ap_pclosesocket(fcgi_config_pool
, s
->listenFd
);
1481 for (i
= 0; i
< s
->numProcesses
; i
++)
1482 s
->procs
[i
].state
= STATE_NEEDS_STARTING
;
1485 ap_destroy_pool(tp
);
1488 ap_log_error(FCGI_LOG_NOTICE_NOERRNO
, fcgi_apache_main_server
,
1489 "FastCGI: process manager initialized");
1491 ap_log_error(FCGI_LOG_NOTICE_NOERRNO
, fcgi_apache_main_server
,
1492 "FastCGI: process manager initialized (pid %ld)", (long)getpid());
1498 * Loop until SIGTERM
1501 int sleepSeconds
= min(dynamicKillInterval
, dynamicUpdateInterval
);
1508 unsigned int numChildren
;
1511 * If we came out of sigsuspend() for any reason other than
1512 * SIGALRM, pick up where we left off.
1515 sleepSeconds
= alarmLeft
;
1518 * Examine each configured AppClass for a process that needs
1519 * starting. Compute the earliest time when the start should
1520 * be attempted, starting it now if the time has passed. Also,
1521 * remember that we do NOT need to restart externally managed
1522 * FastCGI applications.
1524 for (s
= fcgi_servers
; s
!= NULL
; s
= s
->next
) {
1525 if (s
->directive
== APP_CLASS_EXTERNAL
|| s
->listenFd
< 0) {
1528 if (s
->directive
== APP_CLASS_DYNAMIC
) {
1529 numChildren
= dynamicMaxClassProcs
;
1531 numChildren
= s
->numProcesses
;
1534 for (i
= 0; i
< numChildren
; i
++) {
1535 if ((s
->procs
[i
].pid
<= 0) &&
1536 (s
->procs
[i
].state
== STATE_NEEDS_STARTING
))
1540 if (s
->procs
[i
].pid
== 0) {
1541 restartTime
= s
->restartTime
+ s
->initStartDelay
;
1543 restartTime
= s
->restartTime
+ s
->restartDelay
;
1546 if (restartTime
<= now
) {
1547 int restart
= (s
->procs
[i
].pid
< 0);
1549 s
->restartTime
= now
;
1552 if (caughtSigTerm
) {
1553 goto ProcessSigTerm
;
1556 s
->procs
[i
].pid
= spawn_fs_process(s
, &s
->procs
[i
]);
1557 if (s
->procs
[i
].pid
<= 0) {
1558 ap_log_error(FCGI_LOG_CRIT
, fcgi_apache_main_server
,
1559 "FastCGI: can't start%s server \"%s\": spawn_fs_process() failed",
1560 (s
->directive
== APP_CLASS_DYNAMIC
) ? " (dynamic)" : "",
1563 sleepSeconds
= min(sleepSeconds
,
1564 max((int) s
->restartDelay
, FCGI_MIN_EXEC_RETRY_DELAY
));
1566 ap_assert(s
->procs
[i
].pid
< 0);
1570 if (s
->directive
== APP_CLASS_DYNAMIC
) {
1572 fcgi_dynamic_total_proc_count
++;
1573 FCGIDBG2("++ fcgi_dynamic_total_proc_count=%d", fcgi_dynamic_total_proc_count
);
1575 if (i
== 0 && !restart
) {
1576 fcgi_rdwr_unlock(s
->dynamic_lock
, WRITER
);
1581 s
->procs
[i
].state
= STATE_STARTED
;
1586 if (fcgi_suexec
!= NULL
) {
1587 ap_log_error(FCGI_LOG_WARN_NOERRNO
, fcgi_apache_main_server
,
1588 "FastCGI:%s server \"%s\" (uid %ld, gid %ld) %sstarted (pid %ld)",
1589 (s
->directive
== APP_CLASS_DYNAMIC
) ? " (dynamic)" : "",
1590 s
->fs_path
, (long)s
->uid
, (long)s
->gid
,
1591 restart
? "re" : "", (long)s
->procs
[i
].pid
);
1594 ap_log_error(FCGI_LOG_WARN_NOERRNO
, fcgi_apache_main_server
,
1595 "FastCGI:%s server \"%s\" %sstarted (pid %ld)",
1596 (s
->directive
== APP_CLASS_DYNAMIC
) ? " (dynamic)" : "",
1597 s
->fs_path
, restart
? "re" : "", (long)s
->procs
[i
].pid
);
1599 ap_assert(s
->procs
[i
].pid
> 0);
1601 sleepSeconds
= min(sleepSeconds
, restartTime
- now
);
1609 goto ProcessSigTerm
;
1611 if((!caughtSigChld
) && (!caughtSigUsr2
)) {
1614 alarm(sleepSeconds
);
1617 FD_SET(fcgi_pm_pipe
[0], &rfds
);
1618 read_ready
= ap_select(fcgi_pm_pipe
[0] + 1, &rfds
, NULL
, NULL
, NULL
);
1620 alarmLeft
= alarm(0);
1622 callWaitPid
= caughtSigChld
;
1623 caughtSigChld
= FALSE
;
1624 callDynamicProcs
= caughtSigUsr2
;
1625 caughtSigUsr2
= FALSE
;
1630 * Dynamic fcgi process management
1632 if((callDynamicProcs
) || (!callWaitPid
)) {
1633 dynamic_read_msgs(read_ready
);
1634 if(fcgi_dynamic_epoch
== 0) {
1635 fcgi_dynamic_epoch
= now
;
1637 if(((long)(now
-fcgi_dynamic_epoch
)>=dynamicKillInterval
) ||
1638 ((fcgi_dynamic_total_proc_count
+dynamicProcessSlack
)>=dynamicMaxProcs
)) {
1639 dynamic_kill_idle_fs_procs();
1640 fcgi_dynamic_epoch
= now
;
1648 /* We've caught SIGCHLD, so find out who it was using waitpid,
1649 * write a log message and update its data structure. */
1653 goto ProcessSigTerm
;
1655 childPid
= waitpid(-1, &waitStatus
, WNOHANG
);
1657 if (childPid
== -1 || childPid
== 0)
1660 for (s
= fcgi_servers
; s
!= NULL
; s
= s
->next
) {
1661 if (s
->directive
== APP_CLASS_EXTERNAL
)
1664 if (s
->directive
== APP_CLASS_DYNAMIC
)
1665 numChildren
= dynamicMaxClassProcs
;
1667 numChildren
= s
->numProcesses
;
1669 for (i
= 0; i
< numChildren
; i
++) {
1670 if (s
->procs
[i
].pid
== childPid
)
1675 /* @@@ This (comment) needs to go away when dynamic gets cleaned up.
1676 * If we get to this point, we have detected the
1677 * termination of the process that was spawned off by
1678 * the process manager to do a blocking kill above. */
1682 s
->procs
[i
].pid
= -1;
1684 if (s
->directive
== APP_CLASS_STANDARD
) {
1685 /* Always restart static apps */
1686 s
->procs
[i
].state
= STATE_NEEDS_STARTING
;
1691 fcgi_dynamic_total_proc_count
--;
1693 if (s
->procs
[i
].state
== STATE_VICTIM
) {
1694 s
->procs
[i
].state
= STATE_KILLED
;
1697 /* A dynamic app died or exited without provacation from the PM */
1700 if (dynamicAutoRestart
|| s
->numProcesses
<= 0)
1701 s
->procs
[i
].state
= STATE_NEEDS_STARTING
;
1703 s
->procs
[i
].state
= STATE_READY
;
1707 if (WIFEXITED(waitStatus
)) {
1708 ap_log_error(FCGI_LOG_WARN_NOERRNO
, fcgi_apache_main_server
,
1709 "FastCGI:%s server \"%s\" (pid %d) terminated by calling exit with status '%d'",
1710 (s
->directive
== APP_CLASS_DYNAMIC
) ? " (dynamic)" : "",
1711 s
->fs_path
, (int)childPid
, WEXITSTATUS(waitStatus
));
1713 else if (WIFSIGNALED(waitStatus
)) {
1714 ap_log_error(FCGI_LOG_WARN_NOERRNO
, fcgi_apache_main_server
,
1715 "FastCGI:%s server \"%s\" (pid %d) terminated due to uncaught signal '%d' (%s)%s",
1716 (s
->directive
== APP_CLASS_DYNAMIC
) ? " (dynamic)" : "",
1717 s
->fs_path
, (int)childPid
, WTERMSIG(waitStatus
), SYS_SIGLIST
[WTERMSIG(waitStatus
)],
1719 WCOREDUMP(waitStatus
) ? ", a core file may have been generated" : "");
1724 else if (WIFSTOPPED(waitStatus
)) {
1725 ap_log_error(FCGI_LOG_WARN_NOERRNO
, fcgi_apache_main_server
,
1726 "FastCGI:%s server \"%s\" (pid %d) stopped due to uncaught signal '%d' (%s)",
1727 (s
->directive
== APP_CLASS_DYNAMIC
) ? " (dynamic)" : "",
1728 s
->fs_path
, (int)childPid
, WTERMSIG(waitStatus
), SYS_SIGLIST
[WTERMSIG(waitStatus
)]);
1730 } /* for (;;), waitpid() */
1733 /* Start the child wait thread */
1734 wait_thread
= CreateThread(NULL
, 0, (LPTHREAD_START_ROUTINE
)child_wait_thread
, NULL
, 0, NULL
);
1738 /* wait for an event to occur or timer expires */
1739 expire
= time(NULL
) + sleepSeconds
;
1740 dwRet
= WaitForMultipleObjects(3, (HANDLE
*) fcgi_event_handles
, FALSE
, sleepSeconds
* 1000);
1742 if (dwRet
== WAIT_FAILED
) {
1743 /* There is something seriously wrong here */
1744 ap_log_error(APLOG_MARK
,APLOG_CRIT
|APLOG_WIN32ERROR
, fcgi_apache_main_server
,
1745 "FastDGI: WaitForMultipleObjects on event handles -- pm is shuting down");
1749 if (dwRet
!= WAIT_TIMEOUT
) {
1753 alarmLeft
= expire
- now
;
1757 * Dynamic fcgi process management
1759 if ((dwRet
== MBOX_EVENT
) || (dwRet
== WAIT_TIMEOUT
)) {
1760 if (dwRet
== MBOX_EVENT
) {
1766 dynamic_read_msgs(read_ready
);
1768 if(fcgi_dynamic_epoch
== 0) {
1769 fcgi_dynamic_epoch
= now
;
1772 if (((long)(now
-fcgi_dynamic_epoch
) >= (int)dynamicKillInterval
) ||
1773 ((fcgi_dynamic_total_proc_count
+dynamicProcessSlack
) >= dynamicMaxProcs
)) {
1774 dynamic_kill_idle_fs_procs();
1775 fcgi_dynamic_epoch
= now
;
1779 else if (dwRet
== WAKE_EVENT
) {
1782 else if (dwRet
== TERM_EVENT
) {
1783 ap_log_error(FCGI_LOG_INFO_NOERRNO
, fcgi_apache_main_server
,
1784 "FastCGI: Termination event received process manager shutting down");
1787 dwRet
= WaitForSingleObject(wait_thread
, INFINITE
);
1788 goto ProcessSigTerm
;
1791 // Have an received an unknown event - should not happen
1792 ap_log_error(APLOG_MARK
,APLOG_CRIT
|APLOG_WIN32ERROR
, fcgi_apache_main_server
,
1793 "FastCGI: WaitForMultipleobjects return an unrecognized event");
1795 dwRet
= WaitForSingleObject(wait_thread
, INFINITE
);
1796 goto ProcessSigTerm
;
1799 } /* for (;;), the whole shoot'n match */
1803 * Kill off the children, then exit.
1805 while (fcgi_servers
!= NULL
) {
1806 kill_fs_procs(fcgi_config_pool
, fcgi_servers
);
1817 int fcgi_pm_add_job(fcgi_pm_job
*new_job
) {
1819 if (new_job
== NULL
)
1822 if (ap_acquire_mutex(fcgi_dynamic_mbox_mutex
) != MULTI_OK
) {
1823 ap_log_error(FCGI_LOG_ALERT
, fcgi_apache_main_server
,
1824 "FastCGI: Failed to aquire the dynamic mbox mutex!");
1827 new_job
->next
= fcgi_dynamic_mbox
;
1828 fcgi_dynamic_mbox
= new_job
;
1830 if (! ap_release_mutex(fcgi_dynamic_mbox_mutex
)) {
1831 ap_log_error(FCGI_LOG_ALERT
, fcgi_apache_main_server
,
1832 "FastCGI: Failed to release the dynamic mbox mutex!");