1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 * http_log.c: Dealing with the logs and errors
25 #include "apr_general.h" /* for signal stuff */
26 #include "apr_strings.h"
27 #include "apr_errno.h"
28 #include "apr_thread_proc.h"
30 #include "apr_signal.h"
32 #define APR_WANT_STDIO
33 #define APR_WANT_STRFUNC
43 #include "ap_config.h"
45 #include "http_config.h"
46 #include "http_core.h"
48 #include "http_main.h"
49 #include "util_time.h"
58 APR_HOOK_LINK(error_log)
61 int AP_DECLARE_DATA ap_default_loglevel = DEFAULT_LOGLEVEL;
65 static const TRANS facilities[] = {
68 {"authpriv",LOG_AUTHPRIV},
74 {"daemon", LOG_DAEMON},
92 {"syslog", LOG_SYSLOG},
101 {"local0", LOG_LOCAL0},
104 {"local1", LOG_LOCAL1},
107 {"local2", LOG_LOCAL2},
110 {"local3", LOG_LOCAL3},
113 {"local4", LOG_LOCAL4},
116 {"local5", LOG_LOCAL5},
119 {"local6", LOG_LOCAL6},
122 {"local7", LOG_LOCAL7},
128 static const TRANS priorities[] = {
129 {"emerg", APLOG_EMERG},
130 {"alert", APLOG_ALERT},
131 {"crit", APLOG_CRIT},
132 {"error", APLOG_ERR},
133 {"warn", APLOG_WARNING},
134 {"notice", APLOG_NOTICE},
135 {"info", APLOG_INFO},
136 {"debug", APLOG_DEBUG},
140 static apr_pool_t *stderr_pool = NULL;
142 static apr_file_t *stderr_log = NULL;
144 /* track pipe handles to close in child process */
145 typedef struct read_handle_t {
146 struct read_handle_t *next;
150 static read_handle_t *read_handles;
153 * @brief The piped logging structure.
155 * Piped logs are used to move functionality out of the main server.
156 * For example, log rotation is done with piped logs.
159 /** The pool to use for the piped log */
161 /** The pipe between the server and the logging process */
162 apr_file_t *read_fd, *write_fd;
163 /* XXX - an #ifdef that needs to be eliminated from public view. Shouldn't
165 #ifdef AP_HAVE_RELIABLE_PIPED_LOGS
166 /** The name of the program the logging process is running */
168 /** The pid of the logging process */
173 AP_DECLARE(apr_file_t *) ap_piped_log_read_fd(piped_log *pl)
178 AP_DECLARE(apr_file_t *) ap_piped_log_write_fd(piped_log *pl)
183 /* clear_handle_list() is called when plog is cleared; at that
184 * point we need to forget about our old list of pipe read
185 * handles. We let the plog cleanups close the actual pipes.
187 static apr_status_t clear_handle_list(void *v)
193 /* remember to close this handle in the child process
195 * On Win32 this makes zero sense, because we don't
196 * take the parent process's child procs.
197 * If the win32 parent instead passed each and every
198 * logger write handle from itself down to the child,
199 * and the parent manages all aspects of keeping the
200 * reliable pipe log children alive, this would still
201 * make no sense :) Cripple it on Win32.
203 static void close_handle_in_child(apr_pool_t *p, apr_file_t *f)
206 read_handle_t *new_handle;
208 new_handle = apr_pcalloc(p, sizeof(read_handle_t));
209 new_handle->next = read_handles;
210 new_handle->handle = f;
211 read_handles = new_handle;
215 void ap_logs_child_init(apr_pool_t *p, server_rec *s)
217 read_handle_t *cur = read_handles;
220 apr_file_close(cur->handle);
225 AP_DECLARE(void) ap_open_stderr_log(apr_pool_t *p)
227 apr_file_open_stderr(&stderr_log, p);
230 AP_DECLARE(apr_status_t) ap_replace_stderr_log(apr_pool_t *p,
233 apr_file_t *stderr_file;
235 char *filename = ap_server_root_relative(p, fname);
237 ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT,
238 APR_EBADPATH, NULL, "Invalid -E error log file %s",
242 if ((rc = apr_file_open(&stderr_file, filename,
243 APR_APPEND | APR_WRITE | APR_CREATE | APR_LARGEFILE,
244 APR_OS_DEFAULT, p)) != APR_SUCCESS) {
245 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
246 "%s: could not open error log file %s.",
247 ap_server_argv0, fname);
251 /* This is safe provided we revert it when we are finished.
252 * We don't manager the callers pool!
256 if ((rc = apr_file_open_stderr(&stderr_log, stderr_pool))
258 apr_file_flush(stderr_log);
259 if ((rc = apr_file_dup2(stderr_log, stderr_file, stderr_pool))
261 apr_file_close(stderr_file);
263 * You might ponder why stderr_pool should survive?
264 * The trouble is, stderr_pool may have s_main->error_log,
265 * so we aren't in a position to destory stderr_pool until
266 * the next recycle. There's also an apparent bug which
267 * is not; if some folk decided to call this function before
268 * the core open error logs hook, this pool won't survive.
269 * Neither does the stderr logger, so this isn't a problem.
273 /* Revert, see above */
274 if (stderr_pool == p)
277 if (rc != APR_SUCCESS) {
278 ap_log_error(APLOG_MARK, APLOG_CRIT, rc, NULL,
279 "unable to replace stderr with error log file");
284 static void log_child_errfn(apr_pool_t *pool, apr_status_t err,
285 const char *description)
287 ap_log_error(APLOG_MARK, APLOG_ERR, err, NULL,
291 /* Create a child process running PROGNAME with a pipe connected to
292 * the childs stdin. The write-end of the pipe will be placed in
293 * *FPIN on successful return. If dummy_stderr is non-zero, the
294 * stderr for the child will be the same as the stdout of the parent.
295 * Otherwise the child will inherit the stderr from the parent. */
296 static int log_child(apr_pool_t *p, const char *progname,
297 apr_file_t **fpin, int dummy_stderr)
299 /* Child process code for 'ErrorLog "|..."';
300 * may want a common framework for this, since I expect it will
301 * be common for other foo-loggers to want this sort of thing...
304 apr_procattr_t *procattr;
308 if (((rc = apr_procattr_create(&procattr, p)) == APR_SUCCESS)
309 && ((rc = apr_procattr_cmdtype_set(procattr,
310 APR_SHELLCMD_ENV)) == APR_SUCCESS)
311 && ((rc = apr_procattr_io_set(procattr,
314 APR_NO_PIPE)) == APR_SUCCESS)
315 && ((rc = apr_procattr_error_check_set(procattr, 1)) == APR_SUCCESS)
316 && ((rc = apr_procattr_child_errfn_set(procattr, log_child_errfn))
321 apr_tokenize_to_argv(progname, &args, p);
322 pname = apr_pstrdup(p, args[0]);
323 procnew = (apr_proc_t *)apr_pcalloc(p, sizeof(*procnew));
326 if ((rc = apr_file_open_stdout(&errfile, p)) == APR_SUCCESS)
327 rc = apr_procattr_child_err_set(procattr, errfile, NULL);
330 rc = apr_proc_create(procnew, pname, (const char * const *)args,
333 if (rc == APR_SUCCESS) {
334 apr_pool_note_subprocess(p, procnew, APR_KILL_AFTER_TIMEOUT);
335 (*fpin) = procnew->in;
336 /* read handle to pipe not kept open, so no need to call
337 * close_handle_in_child()
345 /* Open the error log for the given server_rec. If IS_MAIN is
346 * non-zero, s is the main server. */
347 static int open_error_log(server_rec *s, int is_main, apr_pool_t *p)
352 if (*s->error_fname == '|') {
353 apr_file_t *dummy = NULL;
355 /* Spawn a new child logger. If this is the main server_rec,
356 * the new child must use a dummy stderr since the current
357 * stderr might be a pipe to the old logger. Otherwise, the
358 * child inherits the parents stderr. */
359 rc = log_child(p, s->error_fname + 1, &dummy, is_main);
360 if (rc != APR_SUCCESS) {
361 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
362 "Couldn't start ErrorLog process '%s'.",
367 s->error_log = dummy;
371 else if (!strncasecmp(s->error_fname, "syslog", 6)) {
372 if ((fname = strchr(s->error_fname, ':'))) {
376 for (fac = facilities; fac->t_name; fac++) {
377 if (!strcasecmp(fname, fac->t_name)) {
378 openlog(ap_server_argv0, LOG_NDELAY|LOG_CONS|LOG_PID,
386 openlog(ap_server_argv0, LOG_NDELAY|LOG_CONS|LOG_PID, LOG_LOCAL7);
393 fname = ap_server_root_relative(p, s->error_fname);
395 ap_log_error(APLOG_MARK, APLOG_STARTUP, APR_EBADPATH, NULL,
396 "%s: Invalid error log path %s.",
397 ap_server_argv0, s->error_fname);
400 if ((rc = apr_file_open(&s->error_log, fname,
401 APR_APPEND | APR_WRITE | APR_CREATE | APR_LARGEFILE,
402 APR_OS_DEFAULT, p)) != APR_SUCCESS) {
403 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
404 "%s: could not open error log file %s.",
405 ap_server_argv0, fname);
413 int ap_open_logs(apr_pool_t *pconf, apr_pool_t *p /* plog */,
414 apr_pool_t *ptemp, server_rec *s_main)
416 apr_pool_t *stderr_p;
417 server_rec *virt, *q;
421 /* Register to throw away the read_handles list when we
422 * cleanup plog. Upon fork() for the apache children,
423 * this read_handles list is closed so only the parent
424 * can relaunch a lost log child. These read handles
425 * are always closed on exec.
426 * We won't care what happens to our stderr log child
427 * between log phases, so we don't mind losing stderr's
428 * read_handle a little bit early.
430 apr_pool_cleanup_register(p, NULL, clear_handle_list,
431 apr_pool_cleanup_null);
433 /* HERE we need a stdout log that outlives plog.
434 * We *presume* the parent of plog is a process
435 * or global pool which spans server restarts.
436 * Create our stderr_pool as a child of the plog's
439 apr_pool_create(&stderr_p, apr_pool_parent_get(p));
440 apr_pool_tag(stderr_p, "stderr_pool");
442 if (open_error_log(s_main, 1, stderr_p) != OK) {
447 if (s_main->error_log) {
450 /* Replace existing stderr with new log. */
451 apr_file_flush(s_main->error_log);
452 rv = apr_file_dup2(stderr_log, s_main->error_log, stderr_p);
453 if (rv != APR_SUCCESS) {
454 ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s_main,
455 "unable to replace stderr with error_log");
458 /* We are done with stderr_pool, close it, killing
459 * the previous generation's stderr logger
462 apr_pool_destroy(stderr_pool);
463 stderr_pool = stderr_p;
466 * Now that we have dup'ed s_main->error_log to stderr_log
467 * close it and set s_main->error_log to stderr_log. This avoids
468 * this fd being inherited by the next piped logger who would
469 * keep open the writing end of the pipe that this one uses
470 * as stdin. This in turn would prevent the piped logger from
473 apr_file_close(s_main->error_log);
474 s_main->error_log = stderr_log;
477 /* note that stderr may still need to be replaced with something
478 * because it points to the old error log, or back to the tty
480 * XXX: This is BS - /dev/null is non-portable
482 if (replace_stderr && freopen("/dev/null", "w", stderr) == NULL) {
483 ap_log_error(APLOG_MARK, APLOG_CRIT, errno, s_main,
484 "unable to replace stderr with /dev/null");
487 for (virt = s_main->next; virt; virt = virt->next) {
488 if (virt->error_fname) {
489 for (q=s_main; q != virt; q = q->next) {
490 if (q->error_fname != NULL
491 && strcmp(q->error_fname, virt->error_fname) == 0) {
497 if (open_error_log(virt, 0, p) != OK) {
502 virt->error_log = q->error_log;
506 virt->error_log = s_main->error_log;
512 AP_DECLARE(void) ap_error_log2stderr(server_rec *s) {
513 apr_file_t *errfile = NULL;
515 apr_file_open_stderr(&errfile, s->process->pool);
516 if (s->error_log != NULL) {
517 apr_file_dup2(s->error_log, errfile, s->process->pool);
521 static void log_error_core(const char *file, int line, int level,
522 apr_status_t status, const server_rec *s,
524 const request_rec *r, apr_pool_t *pool,
525 const char *fmt, va_list args)
527 char errstr[MAX_STRING_LEN];
528 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
529 char scratch[MAX_STRING_LEN];
531 apr_size_t len, errstrlen;
532 apr_file_t *logf = NULL;
534 int level_and_mask = level & APLOG_LEVELMASK;
536 if (r && r->connection) {
542 * If we are doing stderr logging (startup), don't log messages that are
543 * above the default server log level unless it is a startup/shutdown
547 if ((level_and_mask != APLOG_NOTICE)
548 && (level_and_mask > ap_default_loglevel)) {
555 else if (s->error_log) {
557 * If we are doing normal logging, don't log messages that are
558 * above the server log level unless it is a startup/shutdown notice
560 if ((level_and_mask != APLOG_NOTICE)
561 && (level_and_mask > s->loglevel)) {
569 * If we are doing syslog logging, don't log messages that are
570 * above the server log level (including a startup/shutdown notice)
572 if (level_and_mask > s->loglevel) {
577 if (logf && ((level & APLOG_STARTUP) != APLOG_STARTUP)) {
579 ap_recent_ctime(errstr + 1, apr_time_now());
580 errstr[1 + APR_CTIME_LEN - 1] = ']';
581 errstr[1 + APR_CTIME_LEN ] = ' ';
582 len = 1 + APR_CTIME_LEN + 1;
587 if ((level & APLOG_STARTUP) != APLOG_STARTUP) {
588 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
589 "[%s] ", priorities[level_and_mask].t_name);
592 if (file && level_and_mask == APLOG_DEBUG) {
593 #if defined(_OSD_POSIX) || defined(WIN32) || defined(__MVS__)
595 char *e = strrchr(file, '/');
598 e = strrchr(file, '\\');
602 /* In OSD/POSIX, the compiler returns for __FILE__
603 * a string like: __FILE__="*POSIX(/usr/include/stdio.h)"
604 * (it even returns an absolute path for sources in
605 * the current directory). Here we try to strip this
606 * down to the basename.
608 if (e != NULL && e[1] != '\0') {
609 apr_snprintf(tmp, sizeof(tmp), "%s", &e[1]);
610 e = &tmp[strlen(tmp)-1];
616 #else /* _OSD_POSIX || WIN32 */
618 /* On Unix, __FILE__ may be an absolute path in a
620 if (file[0] == '/' && (p = ap_strrchr_c(file, '/')) != NULL) {
623 #endif /*_OSD_POSIX || WIN32 */
624 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
625 "%s(%d): ", file, line);
629 /* XXX: TODO: add a method of selecting whether logged client
630 * addresses are in dotted quad or resolved form... dotted
631 * quad is the most secure, which is why I'm implementing it
634 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
635 "[client %s] ", c->remote_ip);
638 if (status < APR_OS_START_EAIERR) {
639 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
642 else if (status < APR_OS_START_SYSERR) {
643 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
644 "(EAI %d)", status - APR_OS_START_EAIERR);
646 else if (status < 100000 + APR_OS_START_SYSERR) {
647 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
648 "(OS %d)", status - APR_OS_START_SYSERR);
651 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
652 "(os 0x%08x)", status - APR_OS_START_SYSERR);
654 apr_strerror(status, errstr + len, MAX_STRING_LEN - len);
655 len += strlen(errstr + len);
656 if (MAX_STRING_LEN - len > 2) {
664 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
665 if (apr_vsnprintf(scratch, MAX_STRING_LEN - len, fmt, args)) {
666 len += ap_escape_errorlog_item(errstr + len, scratch,
667 MAX_STRING_LEN - len);
670 len += apr_vsnprintf(errstr + len, MAX_STRING_LEN - len, fmt, args);
673 if ( r && (referer = apr_table_get(r->headers_in, "Referer"))
674 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
675 && ap_escape_errorlog_item(scratch, referer, MAX_STRING_LEN - len)
678 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
680 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
688 /* NULL if we are logging to syslog */
690 /* Truncate for the terminator (as apr_snprintf does) */
691 if (len > MAX_STRING_LEN - sizeof(APR_EOL_STR)) {
692 len = MAX_STRING_LEN - sizeof(APR_EOL_STR);
694 strcpy(errstr + len, APR_EOL_STR);
695 apr_file_puts(errstr, logf);
696 apr_file_flush(logf);
700 syslog(level_and_mask, "%s", errstr);
704 ap_run_error_log(file, line, level, status, s, r, pool, errstr + errstrlen);
707 AP_DECLARE(void) ap_log_error(const char *file, int line, int level,
708 apr_status_t status, const server_rec *s,
709 const char *fmt, ...)
714 log_error_core(file, line, level, status, s, NULL, NULL, NULL, fmt, args);
718 AP_DECLARE(void) ap_log_perror(const char *file, int line, int level,
719 apr_status_t status, apr_pool_t *p,
720 const char *fmt, ...)
725 log_error_core(file, line, level, status, NULL, NULL, NULL, p, fmt, args);
729 AP_DECLARE(void) ap_log_rerror(const char *file, int line, int level,
730 apr_status_t status, const request_rec *r,
731 const char *fmt, ...)
736 log_error_core(file, line, level, status, r->server, NULL, r, NULL, fmt,
740 * IF APLOG_TOCLIENT is set,
741 * AND the error level is 'warning' or more severe,
742 * AND there isn't already error text associated with this request,
743 * THEN make the message text available to ErrorDocument and
744 * other error processors.
748 if ((level & APLOG_TOCLIENT)
749 && ((level & APLOG_LEVELMASK) <= APLOG_WARNING)
750 && (apr_table_get(r->notes, "error-notes") == NULL)) {
751 apr_table_setn(r->notes, "error-notes",
752 ap_escape_html(r->pool, apr_pvsprintf(r->pool, fmt,
758 AP_DECLARE(void) ap_log_cerror(const char *file, int line, int level,
759 apr_status_t status, const conn_rec *c,
760 const char *fmt, ...)
765 log_error_core(file, line, level, status, c->base_server, c, NULL, NULL,
770 AP_DECLARE(void) ap_log_pid(apr_pool_t *p, const char *filename)
772 apr_file_t *pid_file = NULL;
774 static pid_t saved_pid = -1;
783 fname = ap_server_root_relative(p, filename);
785 ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT, APR_EBADPATH,
786 NULL, "Invalid PID file path %s, ignoring.", filename);
791 if (mypid != saved_pid
792 && apr_stat(&finfo, fname, APR_FINFO_MTIME, p) == APR_SUCCESS) {
793 /* AP_SIG_GRACEFUL and HUP call this on each restart.
794 * Only warn on first time through for this pid.
796 * XXX: Could just write first time through too, although
797 * that may screw up scripts written to do something
798 * based on the last modification time of the pid file.
800 ap_log_perror(APLOG_MARK, APLOG_WARNING, 0, p,
801 "pid file %s overwritten -- Unclean "
802 "shutdown of previous Apache run?",
806 if ((rv = apr_file_open(&pid_file, fname,
807 APR_WRITE | APR_CREATE | APR_TRUNCATE,
808 APR_UREAD | APR_UWRITE | APR_GREAD | APR_WREAD, p))
810 ap_log_error(APLOG_MARK, APLOG_ERR, rv, NULL,
811 "could not create %s", fname);
812 ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL,
813 "%s: could not log pid to file %s",
814 ap_server_argv0, fname);
817 apr_file_printf(pid_file, "%ld" APR_EOL_STR, (long)mypid);
818 apr_file_close(pid_file);
822 AP_DECLARE(apr_status_t) ap_read_pid(apr_pool_t *p, const char *filename,
825 const apr_size_t BUFFER_SIZE = sizeof(long) * 3 + 2; /* see apr_ltoa */
826 apr_file_t *pid_file = NULL;
830 apr_size_t bytes_read;
836 fname = ap_server_root_relative(p, filename);
838 ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT, APR_EBADPATH,
839 NULL, "Invalid PID file path %s, ignoring.", filename);
843 rv = apr_file_open(&pid_file, fname, APR_READ, APR_OS_DEFAULT, p);
844 if (rv != APR_SUCCESS) {
848 buf = apr_palloc(p, BUFFER_SIZE);
850 rv = apr_file_read_full(pid_file, buf, BUFFER_SIZE - 1, &bytes_read);
851 if (rv != APR_SUCCESS && rv != APR_EOF) {
855 /* If we fill the buffer, we're probably reading a corrupt pid file.
856 * To be nice, let's also ensure the first char is a digit. */
857 if (bytes_read == 0 || bytes_read == BUFFER_SIZE - 1 || !apr_isdigit(*buf)) {
861 buf[bytes_read] = '\0';
862 *mypid = strtol(buf, &endptr, 10);
864 apr_file_close(pid_file);
868 AP_DECLARE(void) ap_log_assert(const char *szExp, const char *szFile,
871 char time_str[APR_CTIME_LEN];
873 apr_ctime(time_str, apr_time_now());
874 ap_log_error(APLOG_MARK, APLOG_CRIT, 0, NULL,
875 "[%s] file %s, line %d, assertion \"%s\" failed",
876 time_str, szFile, nLine, szExp);
880 /* unix assert does an abort leading to a core dump */
885 /* piped log support */
887 #ifdef AP_HAVE_RELIABLE_PIPED_LOGS
888 /* forward declaration */
889 static void piped_log_maintenance(int reason, void *data, apr_wait_t status);
891 /* Spawn the piped logger process pl->program. */
892 static apr_status_t piped_log_spawn(piped_log *pl)
894 apr_procattr_t *procattr;
895 apr_proc_t *procnew = NULL;
898 if (((status = apr_procattr_create(&procattr, pl->p)) != APR_SUCCESS) ||
899 ((status = apr_procattr_cmdtype_set(procattr,
900 APR_SHELLCMD_ENV)) != APR_SUCCESS) ||
901 ((status = apr_procattr_child_in_set(procattr,
905 ((status = apr_procattr_child_errfn_set(procattr, log_child_errfn))
907 ((status = apr_procattr_error_check_set(procattr, 1)) != APR_SUCCESS)) {
909 /* Something bad happened, give up and go away. */
910 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
911 "piped_log_spawn: unable to setup child process '%s': %s",
912 pl->program, apr_strerror(status, buf, sizeof(buf)));
918 apr_tokenize_to_argv(pl->program, &args, pl->p);
919 pname = apr_pstrdup(pl->p, args[0]);
920 procnew = apr_pcalloc(pl->p, sizeof(apr_proc_t));
921 status = apr_proc_create(procnew, pname, (const char * const *) args,
922 NULL, procattr, pl->p);
924 if (status == APR_SUCCESS) {
926 /* procnew->in was dup2'd from pl->write_fd;
927 * since the original fd is still valid, close the copy to
929 apr_file_close(procnew->in);
931 apr_proc_other_child_register(procnew, piped_log_maintenance, pl,
932 pl->write_fd, pl->p);
933 close_handle_in_child(pl->p, pl->read_fd);
937 /* Something bad happened, give up and go away. */
938 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
939 "unable to start piped log program '%s': %s",
940 pl->program, apr_strerror(status, buf, sizeof(buf)));
948 static void piped_log_maintenance(int reason, void *data, apr_wait_t status)
950 piped_log *pl = data;
955 case APR_OC_REASON_DEATH:
956 case APR_OC_REASON_LOST:
957 pl->pid = NULL; /* in case we don't get it going again, this
958 * tells other logic not to try to kill it
960 apr_proc_other_child_unregister(pl);
961 stats = ap_mpm_query(AP_MPMQ_MPM_STATE, &mpm_state);
962 if (stats != APR_SUCCESS) {
963 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
964 "can't query MPM state; not restarting "
965 "piped log program '%s'",
968 else if (mpm_state != AP_MPMQ_STOPPING) {
969 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
970 "piped log program '%s' failed unexpectedly",
972 if ((stats = piped_log_spawn(pl)) != APR_SUCCESS) {
973 /* what can we do? This could be the error log we're having
974 * problems opening up... */
976 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
977 "piped_log_maintenance: unable to respawn '%s': %s",
978 pl->program, apr_strerror(stats, buf, sizeof(buf)));
983 case APR_OC_REASON_UNWRITABLE:
984 /* We should not kill off the pipe here, since it may only be full.
985 * If it really is locked, we should kill it off manually. */
988 case APR_OC_REASON_RESTART:
989 if (pl->pid != NULL) {
990 apr_proc_kill(pl->pid, SIGTERM);
995 case APR_OC_REASON_UNREGISTER:
1001 static apr_status_t piped_log_cleanup_for_exec(void *data)
1003 piped_log *pl = data;
1005 apr_file_close(pl->read_fd);
1006 apr_file_close(pl->write_fd);
1011 static apr_status_t piped_log_cleanup(void *data)
1013 piped_log *pl = data;
1015 if (pl->pid != NULL) {
1016 apr_proc_kill(pl->pid, SIGTERM);
1018 return piped_log_cleanup_for_exec(data);
1022 AP_DECLARE(piped_log *) ap_open_piped_log(apr_pool_t *p, const char *program)
1026 pl = apr_palloc(p, sizeof (*pl));
1028 pl->program = apr_pstrdup(p, program);
1030 if (apr_file_pipe_create_ex(&pl->read_fd,
1032 APR_FULL_BLOCK, p) != APR_SUCCESS) {
1035 apr_pool_cleanup_register(p, pl, piped_log_cleanup,
1036 piped_log_cleanup_for_exec);
1037 if (piped_log_spawn(pl) != APR_SUCCESS) {
1038 apr_pool_cleanup_kill(p, pl, piped_log_cleanup);
1039 apr_file_close(pl->read_fd);
1040 apr_file_close(pl->write_fd);
1046 #else /* !AP_HAVE_RELIABLE_PIPED_LOGS */
1048 static apr_status_t piped_log_cleanup(void *data)
1050 piped_log *pl = data;
1052 apr_file_close(pl->write_fd);
1056 AP_DECLARE(piped_log *) ap_open_piped_log(apr_pool_t *p, const char *program)
1059 apr_file_t *dummy = NULL;
1062 rc = log_child(p, program, &dummy, 0);
1063 if (rc != APR_SUCCESS) {
1064 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
1065 "Couldn't start piped log process '%s'.",
1066 (program == NULL) ? "NULL" : program);
1070 pl = apr_palloc(p, sizeof (*pl));
1073 pl->write_fd = dummy;
1074 apr_pool_cleanup_register(p, pl, piped_log_cleanup, piped_log_cleanup);
1081 AP_DECLARE(void) ap_close_piped_log(piped_log *pl)
1083 apr_pool_cleanup_run(pl->p, pl, piped_log_cleanup);
1086 AP_IMPLEMENT_HOOK_VOID(error_log,
1087 (const char *file, int line, int level,
1088 apr_status_t status, const server_rec *s,
1089 const request_rec *r, apr_pool_t *pool,
1090 const char *errstr), (file, line, level,
1091 status, s, r, pool, errstr))