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
45 #include "ap_config.h"
47 #include "http_config.h"
48 #include "http_core.h"
50 #include "http_main.h"
51 #include "util_time.h"
60 APR_HOOK_LINK(error_log)
63 int AP_DECLARE_DATA ap_default_loglevel = DEFAULT_LOGLEVEL;
67 static const TRANS facilities[] = {
70 {"authpriv",LOG_AUTHPRIV},
76 {"daemon", LOG_DAEMON},
94 {"syslog", LOG_SYSLOG},
103 {"local0", LOG_LOCAL0},
106 {"local1", LOG_LOCAL1},
109 {"local2", LOG_LOCAL2},
112 {"local3", LOG_LOCAL3},
115 {"local4", LOG_LOCAL4},
118 {"local5", LOG_LOCAL5},
121 {"local6", LOG_LOCAL6},
124 {"local7", LOG_LOCAL7},
130 static const TRANS priorities[] = {
131 {"emerg", APLOG_EMERG},
132 {"alert", APLOG_ALERT},
133 {"crit", APLOG_CRIT},
134 {"error", APLOG_ERR},
135 {"warn", APLOG_WARNING},
136 {"notice", APLOG_NOTICE},
137 {"info", APLOG_INFO},
138 {"debug", APLOG_DEBUG},
142 static apr_pool_t *stderr_pool = NULL;
144 static apr_file_t *stderr_log = NULL;
146 /* track pipe handles to close in child process */
147 typedef struct read_handle_t {
148 struct read_handle_t *next;
152 static read_handle_t *read_handles;
154 /* clear_handle_list() is called when plog is cleared; at that
155 * point we need to forget about our old list of pipe read
156 * handles. We let the plog cleanups close the actual pipes.
158 static apr_status_t clear_handle_list(void *v)
164 /* remember to close this handle in the child process
166 * On Win32 this makes zero sense, because we don't
167 * take the parent process's child procs.
168 * If the win32 parent instead passed each and every
169 * logger write handle from itself down to the child,
170 * and the parent manages all aspects of keeping the
171 * reliable pipe log children alive, this would still
172 * make no sense :) Cripple it on Win32.
174 static void close_handle_in_child(apr_pool_t *p, apr_file_t *f)
177 read_handle_t *new_handle;
179 new_handle = apr_pcalloc(p, sizeof(read_handle_t));
180 new_handle->next = read_handles;
181 new_handle->handle = f;
182 read_handles = new_handle;
186 void ap_logs_child_init(apr_pool_t *p, server_rec *s)
188 read_handle_t *cur = read_handles;
191 apr_file_close(cur->handle);
196 AP_DECLARE(void) ap_open_stderr_log(apr_pool_t *p)
198 apr_file_open_stderr(&stderr_log, p);
201 AP_DECLARE(apr_status_t) ap_replace_stderr_log(apr_pool_t *p,
204 apr_file_t *stderr_file;
206 char *filename = ap_server_root_relative(p, fname);
208 ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT,
209 APR_EBADPATH, NULL, "Invalid -E error log file %s",
213 if ((rc = apr_file_open(&stderr_file, filename,
214 APR_APPEND | APR_WRITE | APR_CREATE | APR_LARGEFILE,
215 APR_OS_DEFAULT, p)) != APR_SUCCESS) {
216 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
217 "%s: could not open error log file %s.",
218 ap_server_argv0, fname);
222 /* This is safe provided we revert it when we are finished.
223 * We don't manager the callers pool!
227 if ((rc = apr_file_open_stderr(&stderr_log, stderr_pool))
229 apr_file_flush(stderr_log);
230 if ((rc = apr_file_dup2(stderr_log, stderr_file, stderr_pool))
232 apr_file_close(stderr_file);
234 * You might ponder why stderr_pool should survive?
235 * The trouble is, stderr_pool may have s_main->error_log,
236 * so we aren't in a position to destory stderr_pool until
237 * the next recycle. There's also an apparent bug which
238 * is not; if some folk decided to call this function before
239 * the core open error logs hook, this pool won't survive.
240 * Neither does the stderr logger, so this isn't a problem.
244 /* Revert, see above */
245 if (stderr_pool == p)
248 if (rc != APR_SUCCESS) {
249 ap_log_error(APLOG_MARK, APLOG_CRIT, rc, NULL,
250 "unable to replace stderr with error log file");
255 static void log_child_errfn(apr_pool_t *pool, apr_status_t err,
256 const char *description)
258 ap_log_error(APLOG_MARK, APLOG_ERR, err, NULL,
262 /* Create a child process running PROGNAME with a pipe connected to
263 * the childs stdin. The write-end of the pipe will be placed in
264 * *FPIN on successful return. If dummy_stderr is non-zero, the
265 * stderr for the child will be the same as the stdout of the parent.
266 * Otherwise the child will inherit the stderr from the parent. */
267 static int log_child(apr_pool_t *p, const char *progname,
268 apr_file_t **fpin, int dummy_stderr)
270 /* Child process code for 'ErrorLog "|..."';
271 * may want a common framework for this, since I expect it will
272 * be common for other foo-loggers to want this sort of thing...
275 apr_procattr_t *procattr;
279 if (((rc = apr_procattr_create(&procattr, p)) == APR_SUCCESS)
280 && ((rc = apr_procattr_cmdtype_set(procattr,
281 APR_SHELLCMD_ENV)) == APR_SUCCESS)
282 && ((rc = apr_procattr_io_set(procattr,
285 APR_NO_PIPE)) == APR_SUCCESS)
286 && ((rc = apr_procattr_error_check_set(procattr, 1)) == APR_SUCCESS)
287 && ((rc = apr_procattr_child_errfn_set(procattr, log_child_errfn))
292 apr_tokenize_to_argv(progname, &args, p);
293 pname = apr_pstrdup(p, args[0]);
294 procnew = (apr_proc_t *)apr_pcalloc(p, sizeof(*procnew));
297 if ((rc = apr_file_open_stdout(&errfile, p)) == APR_SUCCESS)
298 rc = apr_procattr_child_err_set(procattr, errfile, NULL);
301 rc = apr_proc_create(procnew, pname, (const char * const *)args,
304 if (rc == APR_SUCCESS) {
305 apr_pool_note_subprocess(p, procnew, APR_KILL_AFTER_TIMEOUT);
306 (*fpin) = procnew->in;
307 /* read handle to pipe not kept open, so no need to call
308 * close_handle_in_child()
316 /* Open the error log for the given server_rec. If IS_MAIN is
317 * non-zero, s is the main server. */
318 static int open_error_log(server_rec *s, int is_main, apr_pool_t *p)
323 if (*s->error_fname == '|') {
324 apr_file_t *dummy = NULL;
326 /* Spawn a new child logger. If this is the main server_rec,
327 * the new child must use a dummy stderr since the current
328 * stderr might be a pipe to the old logger. Otherwise, the
329 * child inherits the parents stderr. */
330 rc = log_child(p, s->error_fname + 1, &dummy, is_main);
331 if (rc != APR_SUCCESS) {
332 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
333 "Couldn't start ErrorLog process");
337 s->error_log = dummy;
341 else if (!strncasecmp(s->error_fname, "syslog", 6)) {
342 if ((fname = strchr(s->error_fname, ':'))) {
346 for (fac = facilities; fac->t_name; fac++) {
347 if (!strcasecmp(fname, fac->t_name)) {
348 openlog(ap_server_argv0, LOG_NDELAY|LOG_CONS|LOG_PID,
356 openlog(ap_server_argv0, LOG_NDELAY|LOG_CONS|LOG_PID, LOG_LOCAL7);
363 fname = ap_server_root_relative(p, s->error_fname);
365 ap_log_error(APLOG_MARK, APLOG_STARTUP, APR_EBADPATH, NULL,
366 "%s: Invalid error log path %s.",
367 ap_server_argv0, s->error_fname);
370 if ((rc = apr_file_open(&s->error_log, fname,
371 APR_APPEND | APR_WRITE | APR_CREATE | APR_LARGEFILE,
372 APR_OS_DEFAULT, p)) != APR_SUCCESS) {
373 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
374 "%s: could not open error log file %s.",
375 ap_server_argv0, fname);
383 int ap_open_logs(apr_pool_t *pconf, apr_pool_t *p /* plog */,
384 apr_pool_t *ptemp, server_rec *s_main)
386 apr_pool_t *stderr_p;
387 server_rec *virt, *q;
391 /* Register to throw away the read_handles list when we
392 * cleanup plog. Upon fork() for the apache children,
393 * this read_handles list is closed so only the parent
394 * can relaunch a lost log child. These read handles
395 * are always closed on exec.
396 * We won't care what happens to our stderr log child
397 * between log phases, so we don't mind losing stderr's
398 * read_handle a little bit early.
400 apr_pool_cleanup_register(p, NULL, clear_handle_list,
401 apr_pool_cleanup_null);
403 /* HERE we need a stdout log that outlives plog.
404 * We *presume* the parent of plog is a process
405 * or global pool which spans server restarts.
406 * Create our stderr_pool as a child of the plog's
409 apr_pool_create(&stderr_p, apr_pool_parent_get(p));
410 apr_pool_tag(stderr_p, "stderr_pool");
412 if (open_error_log(s_main, 1, stderr_p) != OK) {
417 if (s_main->error_log) {
420 /* Replace existing stderr with new log. */
421 apr_file_flush(s_main->error_log);
422 rv = apr_file_dup2(stderr_log, s_main->error_log, stderr_p);
423 if (rv != APR_SUCCESS) {
424 ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s_main,
425 "unable to replace stderr with error_log");
428 /* We are done with stderr_pool, close it, killing
429 * the previous generation's stderr logger
432 apr_pool_destroy(stderr_pool);
433 stderr_pool = stderr_p;
436 * Now that we have dup'ed s_main->error_log to stderr_log
437 * close it and set s_main->error_log to stderr_log. This avoids
438 * this fd being inherited by the next piped logger who would
439 * keep open the writing end of the pipe that this one uses
440 * as stdin. This in turn would prevent the piped logger from
443 apr_file_close(s_main->error_log);
444 s_main->error_log = stderr_log;
447 /* note that stderr may still need to be replaced with something
448 * because it points to the old error log, or back to the tty
450 * XXX: This is BS - /dev/null is non-portable
452 if (replace_stderr && freopen("/dev/null", "w", stderr) == NULL) {
453 ap_log_error(APLOG_MARK, APLOG_CRIT, errno, s_main,
454 "unable to replace stderr with /dev/null");
457 for (virt = s_main->next; virt; virt = virt->next) {
458 if (virt->error_fname) {
459 for (q=s_main; q != virt; q = q->next) {
460 if (q->error_fname != NULL
461 && strcmp(q->error_fname, virt->error_fname) == 0) {
467 if (open_error_log(virt, 0, p) != OK) {
472 virt->error_log = q->error_log;
476 virt->error_log = s_main->error_log;
482 AP_DECLARE(void) ap_error_log2stderr(server_rec *s) {
483 apr_file_t *errfile = NULL;
485 apr_file_open_stderr(&errfile, s->process->pool);
486 if (s->error_log != NULL) {
487 apr_file_dup2(s->error_log, errfile, s->process->pool);
491 static void log_error_core(const char *file, int line, int level,
492 apr_status_t status, const server_rec *s,
494 const request_rec *r, apr_pool_t *pool,
495 const char *fmt, va_list args)
497 char errstr[MAX_STRING_LEN];
498 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
499 char scratch[MAX_STRING_LEN];
501 apr_size_t len, errstrlen;
502 apr_file_t *logf = NULL;
504 int level_and_mask = level & APLOG_LEVELMASK;
506 if (r && r->connection) {
512 * If we are doing stderr logging (startup), don't log messages that are
513 * above the default server log level unless it is a startup/shutdown
516 if ((level_and_mask != APLOG_NOTICE)
517 && (level_and_mask > ap_default_loglevel)) {
523 else if (s->error_log) {
525 * If we are doing normal logging, don't log messages that are
526 * above the server log level unless it is a startup/shutdown notice
528 if ((level_and_mask != APLOG_NOTICE)
529 && (level_and_mask > s->loglevel)) {
536 else if (tpf_child) {
538 * If we are doing normal logging, don't log messages that are
539 * above the server log level unless it is a startup/shutdown notice
541 if ((level_and_mask != APLOG_NOTICE)
542 && (level_and_mask > s->loglevel)) {
551 * If we are doing syslog logging, don't log messages that are
552 * above the server log level (including a startup/shutdown notice)
554 if (level_and_mask > s->loglevel) {
559 if (logf && ((level & APLOG_STARTUP) != APLOG_STARTUP)) {
561 ap_recent_ctime(errstr + 1, apr_time_now());
562 errstr[1 + APR_CTIME_LEN - 1] = ']';
563 errstr[1 + APR_CTIME_LEN ] = ' ';
564 len = 1 + APR_CTIME_LEN + 1;
569 if ((level & APLOG_STARTUP) != APLOG_STARTUP) {
570 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
571 "[%s] ", priorities[level_and_mask].t_name);
575 if (file && level_and_mask == APLOG_DEBUG) {
576 #if defined(_OSD_POSIX) || defined(WIN32) || defined(__MVS__)
578 char *e = strrchr(file, '/');
581 e = strrchr(file, '\\');
585 /* In OSD/POSIX, the compiler returns for __FILE__
586 * a string like: __FILE__="*POSIX(/usr/include/stdio.h)"
587 * (it even returns an absolute path for sources in
588 * the current directory). Here we try to strip this
589 * down to the basename.
591 if (e != NULL && e[1] != '\0') {
592 apr_snprintf(tmp, sizeof(tmp), "%s", &e[1]);
593 e = &tmp[strlen(tmp)-1];
599 #else /* _OSD_POSIX || WIN32 */
601 /* On Unix, __FILE__ may be an absolute path in a
603 if (file[0] == '/' && (p = ap_strrchr_c(file, '/')) != NULL) {
606 #endif /*_OSD_POSIX || WIN32 */
607 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
608 "%s(%d): ", file, line);
613 /* XXX: TODO: add a method of selecting whether logged client
614 * addresses are in dotted quad or resolved form... dotted
615 * quad is the most secure, which is why I'm implementing it
618 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
619 "[client %s] ", c->remote_ip);
622 if (status < APR_OS_START_EAIERR) {
623 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
626 else if (status < APR_OS_START_SYSERR) {
627 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
628 "(EAI %d)", status - APR_OS_START_EAIERR);
630 else if (status < 100000 + APR_OS_START_SYSERR) {
631 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
632 "(OS %d)", status - APR_OS_START_SYSERR);
635 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
636 "(os 0x%08x)", status - APR_OS_START_SYSERR);
638 apr_strerror(status, errstr + len, MAX_STRING_LEN - len);
639 len += strlen(errstr + len);
640 if (MAX_STRING_LEN - len > 2) {
648 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
649 if (apr_vsnprintf(scratch, MAX_STRING_LEN - len, fmt, args)) {
650 len += ap_escape_errorlog_item(errstr + len, scratch,
651 MAX_STRING_LEN - len);
654 len += apr_vsnprintf(errstr + len, MAX_STRING_LEN - len, fmt, args);
657 if ( r && (referer = apr_table_get(r->headers_in, "Referer"))
658 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
659 && ap_escape_errorlog_item(scratch, referer, MAX_STRING_LEN - len)
662 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
664 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
672 /* NULL if we are logging to syslog */
674 /* Truncate for the terminator (as apr_snprintf does) */
675 if (len > MAX_STRING_LEN - sizeof(APR_EOL_STR)) {
676 len = MAX_STRING_LEN - sizeof(APR_EOL_STR);
678 strcpy(errstr + len, APR_EOL_STR);
679 apr_file_puts(errstr, logf);
680 apr_file_flush(logf);
684 syslog(level_and_mask, "%s", errstr);
688 ap_run_error_log(file, line, level, status, s, r, pool, errstr + errstrlen);
691 AP_DECLARE(void) ap_log_error(const char *file, int line, int level,
692 apr_status_t status, const server_rec *s,
693 const char *fmt, ...)
698 log_error_core(file, line, level, status, s, NULL, NULL, NULL, fmt, args);
702 AP_DECLARE(void) ap_log_perror(const char *file, int line, int level,
703 apr_status_t status, apr_pool_t *p,
704 const char *fmt, ...)
709 log_error_core(file, line, level, status, NULL, NULL, NULL, p, fmt, args);
713 AP_DECLARE(void) ap_log_rerror(const char *file, int line, int level,
714 apr_status_t status, const request_rec *r,
715 const char *fmt, ...)
720 log_error_core(file, line, level, status, r->server, NULL, r, NULL, fmt,
724 * IF APLOG_TOCLIENT is set,
725 * AND the error level is 'warning' or more severe,
726 * AND there isn't already error text associated with this request,
727 * THEN make the message text available to ErrorDocument and
728 * other error processors.
732 if ((level & APLOG_TOCLIENT)
733 && ((level & APLOG_LEVELMASK) <= APLOG_WARNING)
734 && (apr_table_get(r->notes, "error-notes") == NULL)) {
735 apr_table_setn(r->notes, "error-notes",
736 ap_escape_html(r->pool, apr_pvsprintf(r->pool, fmt,
742 AP_DECLARE(void) ap_log_cerror(const char *file, int line, int level,
743 apr_status_t status, const conn_rec *c,
744 const char *fmt, ...)
749 log_error_core(file, line, level, status, c->base_server, c, NULL, NULL,
754 AP_DECLARE(void) ap_log_pid(apr_pool_t *p, const char *filename)
756 apr_file_t *pid_file = NULL;
758 static pid_t saved_pid = -1;
767 fname = ap_server_root_relative(p, filename);
769 ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT, APR_EBADPATH,
770 NULL, "Invalid PID file path %s, ignoring.", filename);
775 if (mypid != saved_pid
776 && apr_stat(&finfo, fname, APR_FINFO_MTIME, p) == APR_SUCCESS) {
777 /* AP_SIG_GRACEFUL and HUP call this on each restart.
778 * Only warn on first time through for this pid.
780 * XXX: Could just write first time through too, although
781 * that may screw up scripts written to do something
782 * based on the last modification time of the pid file.
784 ap_log_perror(APLOG_MARK, APLOG_WARNING, 0, p,
785 "pid file %s overwritten -- Unclean "
786 "shutdown of previous Apache run?",
790 if ((rv = apr_file_open(&pid_file, fname,
791 APR_WRITE | APR_CREATE | APR_TRUNCATE,
792 APR_UREAD | APR_UWRITE | APR_GREAD | APR_WREAD, p))
794 ap_log_error(APLOG_MARK, APLOG_ERR, rv, NULL,
795 "could not create %s", fname);
796 ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL,
797 "%s: could not log pid to file %s",
798 ap_server_argv0, fname);
801 apr_file_printf(pid_file, "%ld" APR_EOL_STR, (long)mypid);
802 apr_file_close(pid_file);
806 AP_DECLARE(apr_status_t) ap_read_pid(apr_pool_t *p, const char *filename,
809 const apr_size_t BUFFER_SIZE = sizeof(long) * 3 + 2; /* see apr_ltoa */
810 apr_file_t *pid_file = NULL;
814 apr_size_t bytes_read;
820 fname = ap_server_root_relative(p, filename);
822 ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT, APR_EBADPATH,
823 NULL, "Invalid PID file path %s, ignoring.", filename);
827 rv = apr_file_open(&pid_file, fname, APR_READ, APR_OS_DEFAULT, p);
828 if (rv != APR_SUCCESS) {
832 buf = apr_palloc(p, BUFFER_SIZE);
834 rv = apr_file_read_full(pid_file, buf, BUFFER_SIZE - 1, &bytes_read);
835 if (rv != APR_SUCCESS && rv != APR_EOF) {
839 /* If we fill the buffer, we're probably reading a corrupt pid file.
840 * To be nice, let's also ensure the first char is a digit. */
841 if (bytes_read == 0 || bytes_read == BUFFER_SIZE - 1 || !apr_isdigit(*buf)) {
845 buf[bytes_read] = '\0';
846 *mypid = strtol(buf, &endptr, 10);
848 apr_file_close(pid_file);
852 AP_DECLARE(void) ap_log_assert(const char *szExp, const char *szFile,
855 char time_str[APR_CTIME_LEN];
857 apr_ctime(time_str, apr_time_now());
858 ap_log_error(APLOG_MARK, APLOG_CRIT, 0, NULL,
859 "[%s] file %s, line %d, assertion \"%s\" failed",
860 time_str, szFile, nLine, szExp);
864 /* unix assert does an abort leading to a core dump */
869 /* piped log support */
871 #ifdef AP_HAVE_RELIABLE_PIPED_LOGS
872 /* forward declaration */
873 static void piped_log_maintenance(int reason, void *data, apr_wait_t status);
875 /* Spawn the piped logger process pl->program. */
876 static apr_status_t piped_log_spawn(piped_log *pl)
878 apr_procattr_t *procattr;
879 apr_proc_t *procnew = NULL;
882 if (((status = apr_procattr_create(&procattr, pl->p)) != APR_SUCCESS) ||
883 ((status = apr_procattr_cmdtype_set(procattr,
884 APR_SHELLCMD_ENV)) != APR_SUCCESS) ||
885 ((status = apr_procattr_child_in_set(procattr,
886 ap_piped_log_read_fd(pl),
887 ap_piped_log_write_fd(pl)))
889 ((status = apr_procattr_child_errfn_set(procattr, log_child_errfn))
891 ((status = apr_procattr_error_check_set(procattr, 1)) != APR_SUCCESS)) {
893 /* Something bad happened, give up and go away. */
894 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
895 "piped_log_spawn: unable to setup child process '%s': %s",
896 pl->program, apr_strerror(status, buf, sizeof(buf)));
902 apr_tokenize_to_argv(pl->program, &args, pl->p);
903 pname = apr_pstrdup(pl->p, args[0]);
904 procnew = apr_pcalloc(pl->p, sizeof(apr_proc_t));
905 status = apr_proc_create(procnew, pname, (const char * const *) args,
906 NULL, procattr, pl->p);
908 if (status == APR_SUCCESS) {
910 /* procnew->in was dup2'd from ap_piped_log_write_fd(pl);
911 * since the original fd is still valid, close the copy to
913 apr_file_close(procnew->in);
915 apr_proc_other_child_register(procnew, piped_log_maintenance, pl,
916 ap_piped_log_write_fd(pl), pl->p);
917 close_handle_in_child(pl->p, ap_piped_log_read_fd(pl));
921 /* Something bad happened, give up and go away. */
922 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
923 "unable to start piped log program '%s': %s",
924 pl->program, apr_strerror(status, buf, sizeof(buf)));
932 static void piped_log_maintenance(int reason, void *data, apr_wait_t status)
934 piped_log *pl = data;
939 case APR_OC_REASON_DEATH:
940 case APR_OC_REASON_LOST:
941 pl->pid = NULL; /* in case we don't get it going again, this
942 * tells other logic not to try to kill it
944 apr_proc_other_child_unregister(pl);
945 stats = ap_mpm_query(AP_MPMQ_MPM_STATE, &mpm_state);
946 if (stats != APR_SUCCESS) {
947 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
948 "can't query MPM state; not restarting "
949 "piped log program '%s'",
952 else if (mpm_state != AP_MPMQ_STOPPING) {
953 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
954 "piped log program '%s' failed unexpectedly",
956 if ((stats = piped_log_spawn(pl)) != APR_SUCCESS) {
957 /* what can we do? This could be the error log we're having
958 * problems opening up... */
960 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
961 "piped_log_maintenance: unable to respawn '%s': %s",
962 pl->program, apr_strerror(stats, buf, sizeof(buf)));
967 case APR_OC_REASON_UNWRITABLE:
968 /* We should not kill off the pipe here, since it may only be full.
969 * If it really is locked, we should kill it off manually. */
972 case APR_OC_REASON_RESTART:
973 if (pl->pid != NULL) {
974 apr_proc_kill(pl->pid, SIGTERM);
979 case APR_OC_REASON_UNREGISTER:
985 static apr_status_t piped_log_cleanup_for_exec(void *data)
987 piped_log *pl = data;
989 apr_file_close(ap_piped_log_read_fd(pl));
990 apr_file_close(ap_piped_log_write_fd(pl));
995 static apr_status_t piped_log_cleanup(void *data)
997 piped_log *pl = data;
999 if (pl->pid != NULL) {
1000 apr_proc_kill(pl->pid, SIGTERM);
1002 return piped_log_cleanup_for_exec(data);
1006 AP_DECLARE(piped_log *) ap_open_piped_log(apr_pool_t *p, const char *program)
1010 pl = apr_palloc(p, sizeof (*pl));
1012 pl->program = apr_pstrdup(p, program);
1014 if (apr_file_pipe_create_ex(&ap_piped_log_read_fd(pl),
1015 &ap_piped_log_write_fd(pl),
1016 APR_FULL_BLOCK, p) != APR_SUCCESS) {
1019 apr_pool_cleanup_register(p, pl, piped_log_cleanup,
1020 piped_log_cleanup_for_exec);
1021 if (piped_log_spawn(pl) != APR_SUCCESS) {
1022 apr_pool_cleanup_kill(p, pl, piped_log_cleanup);
1023 apr_file_close(ap_piped_log_read_fd(pl));
1024 apr_file_close(ap_piped_log_write_fd(pl));
1030 #else /* !AP_HAVE_RELIABLE_PIPED_LOGS */
1032 static apr_status_t piped_log_cleanup(void *data)
1034 piped_log *pl = data;
1036 apr_file_close(ap_piped_log_write_fd(pl));
1040 AP_DECLARE(piped_log *) ap_open_piped_log(apr_pool_t *p, const char *program)
1043 apr_file_t *dummy = NULL;
1046 rc = log_child(p, program, &dummy, 0);
1047 if (rc != APR_SUCCESS) {
1048 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
1049 "Couldn't start piped log process");
1053 pl = apr_palloc(p, sizeof (*pl));
1055 ap_piped_log_read_fd(pl) = NULL;
1056 ap_piped_log_write_fd(pl) = dummy;
1057 apr_pool_cleanup_register(p, pl, piped_log_cleanup, piped_log_cleanup);
1064 AP_DECLARE(void) ap_close_piped_log(piped_log *pl)
1066 apr_pool_cleanup_run(pl->p, pl, piped_log_cleanup);
1069 AP_IMPLEMENT_HOOK_VOID(error_log,
1070 (const char *file, int line, int level,
1071 apr_status_t status, const server_rec *s,
1072 const request_rec *r, apr_pool_t *pool,
1073 const char *errstr), (file, line, level,
1074 status, s, r, pool, errstr))