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;
152 /* clear_handle_list() is called when plog is cleared; at that
153 * point we need to forget about our old list of pipe read
154 * handles. We let the plog cleanups close the actual pipes.
156 static apr_status_t clear_handle_list(void *v)
162 /* remember to close this handle in the child process
164 * On Win32 this makes zero sense, because we don't
165 * take the parent process's child procs.
166 * If the win32 parent instead passed each and every
167 * logger write handle from itself down to the child,
168 * and the parent manages all aspects of keeping the
169 * reliable pipe log children alive, this would still
170 * make no sense :) Cripple it on Win32.
172 static void close_handle_in_child(apr_pool_t *p, apr_file_t *f)
175 read_handle_t *new_handle;
177 new_handle = apr_pcalloc(p, sizeof(read_handle_t));
178 new_handle->next = read_handles;
179 new_handle->handle = f;
180 read_handles = new_handle;
184 void ap_logs_child_init(apr_pool_t *p, server_rec *s)
186 read_handle_t *cur = read_handles;
189 apr_file_close(cur->handle);
194 AP_DECLARE(void) ap_open_stderr_log(apr_pool_t *p)
196 apr_file_open_stderr(&stderr_log, p);
199 AP_DECLARE(apr_status_t) ap_replace_stderr_log(apr_pool_t *p,
202 apr_file_t *stderr_file;
204 char *filename = ap_server_root_relative(p, fname);
206 ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT,
207 APR_EBADPATH, NULL, "Invalid -E error log file %s",
211 if ((rc = apr_file_open(&stderr_file, filename,
212 APR_APPEND | APR_WRITE | APR_CREATE | APR_LARGEFILE,
213 APR_OS_DEFAULT, p)) != APR_SUCCESS) {
214 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
215 "%s: could not open error log file %s.",
216 ap_server_argv0, fname);
220 /* This is safe provided we revert it when we are finished.
221 * We don't manager the callers pool!
225 if ((rc = apr_file_open_stderr(&stderr_log, stderr_pool))
227 apr_file_flush(stderr_log);
228 if ((rc = apr_file_dup2(stderr_log, stderr_file, stderr_pool))
230 apr_file_close(stderr_file);
232 * You might ponder why stderr_pool should survive?
233 * The trouble is, stderr_pool may have s_main->error_log,
234 * so we aren't in a position to destory stderr_pool until
235 * the next recycle. There's also an apparent bug which
236 * is not; if some folk decided to call this function before
237 * the core open error logs hook, this pool won't survive.
238 * Neither does the stderr logger, so this isn't a problem.
242 /* Revert, see above */
243 if (stderr_pool == p)
246 if (rc != APR_SUCCESS) {
247 ap_log_error(APLOG_MARK, APLOG_CRIT, rc, NULL,
248 "unable to replace stderr with error log file");
253 static void log_child_errfn(apr_pool_t *pool, apr_status_t err,
254 const char *description)
256 ap_log_error(APLOG_MARK, APLOG_ERR, err, NULL,
260 /* Create a child process running PROGNAME with a pipe connected to
261 * the childs stdin. The write-end of the pipe will be placed in
262 * *FPIN on successful return. If dummy_stderr is non-zero, the
263 * stderr for the child will be the same as the stdout of the parent.
264 * Otherwise the child will inherit the stderr from the parent. */
265 static int log_child(apr_pool_t *p, const char *progname,
266 apr_file_t **fpin, int dummy_stderr)
268 /* Child process code for 'ErrorLog "|..."';
269 * may want a common framework for this, since I expect it will
270 * be common for other foo-loggers to want this sort of thing...
273 apr_procattr_t *procattr;
277 if (((rc = apr_procattr_create(&procattr, p)) == APR_SUCCESS)
278 && ((rc = apr_procattr_cmdtype_set(procattr,
279 APR_SHELLCMD_ENV)) == APR_SUCCESS)
280 && ((rc = apr_procattr_io_set(procattr,
283 APR_NO_PIPE)) == APR_SUCCESS)
284 && ((rc = apr_procattr_error_check_set(procattr, 1)) == APR_SUCCESS)
285 && ((rc = apr_procattr_child_errfn_set(procattr, log_child_errfn))
290 apr_tokenize_to_argv(progname, &args, p);
291 pname = apr_pstrdup(p, args[0]);
292 procnew = (apr_proc_t *)apr_pcalloc(p, sizeof(*procnew));
295 if ((rc = apr_file_open_stdout(&errfile, p)) == APR_SUCCESS)
296 rc = apr_procattr_child_err_set(procattr, errfile, NULL);
299 rc = apr_proc_create(procnew, pname, (const char * const *)args,
302 if (rc == APR_SUCCESS) {
303 apr_pool_note_subprocess(p, procnew, APR_KILL_AFTER_TIMEOUT);
304 (*fpin) = procnew->in;
305 /* read handle to pipe not kept open, so no need to call
306 * close_handle_in_child()
314 /* Open the error log for the given server_rec. If IS_MAIN is
315 * non-zero, s is the main server. */
316 static int open_error_log(server_rec *s, int is_main, apr_pool_t *p)
321 if (*s->error_fname == '|') {
322 apr_file_t *dummy = NULL;
324 /* Spawn a new child logger. If this is the main server_rec,
325 * the new child must use a dummy stderr since the current
326 * stderr might be a pipe to the old logger. Otherwise, the
327 * child inherits the parents stderr. */
328 rc = log_child(p, s->error_fname + 1, &dummy, is_main);
329 if (rc != APR_SUCCESS) {
330 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
331 "Couldn't start ErrorLog process");
335 s->error_log = dummy;
339 else if (!strncasecmp(s->error_fname, "syslog", 6)) {
340 if ((fname = strchr(s->error_fname, ':'))) {
344 for (fac = facilities; fac->t_name; fac++) {
345 if (!strcasecmp(fname, fac->t_name)) {
346 openlog(ap_server_argv0, LOG_NDELAY|LOG_CONS|LOG_PID,
354 openlog(ap_server_argv0, LOG_NDELAY|LOG_CONS|LOG_PID, LOG_LOCAL7);
361 fname = ap_server_root_relative(p, s->error_fname);
363 ap_log_error(APLOG_MARK, APLOG_STARTUP, APR_EBADPATH, NULL,
364 "%s: Invalid error log path %s.",
365 ap_server_argv0, s->error_fname);
368 if ((rc = apr_file_open(&s->error_log, fname,
369 APR_APPEND | APR_WRITE | APR_CREATE | APR_LARGEFILE,
370 APR_OS_DEFAULT, p)) != APR_SUCCESS) {
371 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
372 "%s: could not open error log file %s.",
373 ap_server_argv0, fname);
381 int ap_open_logs(apr_pool_t *pconf, apr_pool_t *p /* plog */,
382 apr_pool_t *ptemp, server_rec *s_main)
384 apr_pool_t *stderr_p;
385 server_rec *virt, *q;
389 /* Register to throw away the read_handles list when we
390 * cleanup plog. Upon fork() for the apache children,
391 * this read_handles list is closed so only the parent
392 * can relaunch a lost log child. These read handles
393 * are always closed on exec.
394 * We won't care what happens to our stderr log child
395 * between log phases, so we don't mind losing stderr's
396 * read_handle a little bit early.
398 apr_pool_cleanup_register(p, NULL, clear_handle_list,
399 apr_pool_cleanup_null);
401 /* HERE we need a stdout log that outlives plog.
402 * We *presume* the parent of plog is a process
403 * or global pool which spans server restarts.
404 * Create our stderr_pool as a child of the plog's
407 apr_pool_create(&stderr_p, apr_pool_parent_get(p));
408 apr_pool_tag(stderr_p, "stderr_pool");
410 if (open_error_log(s_main, 1, stderr_p) != OK) {
415 if (s_main->error_log) {
418 /* Replace existing stderr with new log. */
419 apr_file_flush(s_main->error_log);
420 rv = apr_file_dup2(stderr_log, s_main->error_log, stderr_p);
421 if (rv != APR_SUCCESS) {
422 ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s_main,
423 "unable to replace stderr with error_log");
426 /* We are done with stderr_pool, close it, killing
427 * the previous generation's stderr logger
430 apr_pool_destroy(stderr_pool);
431 stderr_pool = stderr_p;
434 * Now that we have dup'ed s_main->error_log to stderr_log
435 * close it and set s_main->error_log to stderr_log. This avoids
436 * this fd being inherited by the next piped logger who would
437 * keep open the writing end of the pipe that this one uses
438 * as stdin. This in turn would prevent the piped logger from
441 apr_file_close(s_main->error_log);
442 s_main->error_log = stderr_log;
445 /* note that stderr may still need to be replaced with something
446 * because it points to the old error log, or back to the tty
448 * XXX: This is BS - /dev/null is non-portable
450 if (replace_stderr && freopen("/dev/null", "w", stderr) == NULL) {
451 ap_log_error(APLOG_MARK, APLOG_CRIT, errno, s_main,
452 "unable to replace stderr with /dev/null");
455 for (virt = s_main->next; virt; virt = virt->next) {
456 if (virt->error_fname) {
457 for (q=s_main; q != virt; q = q->next) {
458 if (q->error_fname != NULL
459 && strcmp(q->error_fname, virt->error_fname) == 0) {
465 if (open_error_log(virt, 0, p) != OK) {
470 virt->error_log = q->error_log;
474 virt->error_log = s_main->error_log;
480 AP_DECLARE(void) ap_error_log2stderr(server_rec *s) {
481 apr_file_t *errfile = NULL;
483 apr_file_open_stderr(&errfile, s->process->pool);
484 if (s->error_log != NULL) {
485 apr_file_dup2(s->error_log, errfile, s->process->pool);
489 static void log_error_core(const char *file, int line, int level,
490 apr_status_t status, const server_rec *s,
492 const request_rec *r, apr_pool_t *pool,
493 const char *fmt, va_list args)
495 char errstr[MAX_STRING_LEN];
496 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
497 char scratch[MAX_STRING_LEN];
499 apr_size_t len, errstrlen;
500 apr_file_t *logf = NULL;
502 int level_and_mask = level & APLOG_LEVELMASK;
504 if (r && r->connection) {
510 * If we are doing stderr logging (startup), don't log messages that are
511 * above the default server log level unless it is a startup/shutdown
514 if ((level_and_mask != APLOG_NOTICE)
515 && (level_and_mask > ap_default_loglevel)) {
521 else if (s->error_log) {
523 * If we are doing normal logging, don't log messages that are
524 * above the server log level unless it is a startup/shutdown notice
526 if ((level_and_mask != APLOG_NOTICE)
527 && (level_and_mask > s->loglevel)) {
534 else if (tpf_child) {
536 * If we are doing normal logging, don't log messages that are
537 * above the server log level unless it is a startup/shutdown notice
539 if ((level_and_mask != APLOG_NOTICE)
540 && (level_and_mask > s->loglevel)) {
549 * If we are doing syslog logging, don't log messages that are
550 * above the server log level (including a startup/shutdown notice)
552 if (level_and_mask > s->loglevel) {
557 if (logf && ((level & APLOG_STARTUP) != APLOG_STARTUP)) {
559 ap_recent_ctime(errstr + 1, apr_time_now());
560 errstr[1 + APR_CTIME_LEN - 1] = ']';
561 errstr[1 + APR_CTIME_LEN ] = ' ';
562 len = 1 + APR_CTIME_LEN + 1;
567 if ((level & APLOG_STARTUP) != APLOG_STARTUP) {
568 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
569 "[%s] ", priorities[level_and_mask].t_name);
573 if (file && level_and_mask == APLOG_DEBUG) {
574 #if defined(_OSD_POSIX) || defined(WIN32) || defined(__MVS__)
576 char *e = strrchr(file, '/');
579 e = strrchr(file, '\\');
583 /* In OSD/POSIX, the compiler returns for __FILE__
584 * a string like: __FILE__="*POSIX(/usr/include/stdio.h)"
585 * (it even returns an absolute path for sources in
586 * the current directory). Here we try to strip this
587 * down to the basename.
589 if (e != NULL && e[1] != '\0') {
590 apr_snprintf(tmp, sizeof(tmp), "%s", &e[1]);
591 e = &tmp[strlen(tmp)-1];
597 #else /* _OSD_POSIX || WIN32 */
599 /* On Unix, __FILE__ may be an absolute path in a
601 if (file[0] == '/' && (p = ap_strrchr_c(file, '/')) != NULL) {
604 #endif /*_OSD_POSIX || WIN32 */
605 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
606 "%s(%d): ", file, line);
611 /* XXX: TODO: add a method of selecting whether logged client
612 * addresses are in dotted quad or resolved form... dotted
613 * quad is the most secure, which is why I'm implementing it
616 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
617 "[client %s] ", c->remote_ip);
620 if (status < APR_OS_START_EAIERR) {
621 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
624 else if (status < APR_OS_START_SYSERR) {
625 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
626 "(EAI %d)", status - APR_OS_START_EAIERR);
628 else if (status < 100000 + APR_OS_START_SYSERR) {
629 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
630 "(OS %d)", status - APR_OS_START_SYSERR);
633 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
634 "(os 0x%08x)", status - APR_OS_START_SYSERR);
636 apr_strerror(status, errstr + len, MAX_STRING_LEN - len);
637 len += strlen(errstr + len);
638 if (MAX_STRING_LEN - len > 2) {
646 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
647 if (apr_vsnprintf(scratch, MAX_STRING_LEN - len, fmt, args)) {
648 len += ap_escape_errorlog_item(errstr + len, scratch,
649 MAX_STRING_LEN - len);
652 len += apr_vsnprintf(errstr + len, MAX_STRING_LEN - len, fmt, args);
655 if ( r && (referer = apr_table_get(r->headers_in, "Referer"))
656 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
657 && ap_escape_errorlog_item(scratch, referer, MAX_STRING_LEN - len)
660 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
662 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
670 /* NULL if we are logging to syslog */
672 /* Truncate for the terminator (as apr_snprintf does) */
673 if (len > MAX_STRING_LEN - sizeof(APR_EOL_STR)) {
674 len = MAX_STRING_LEN - sizeof(APR_EOL_STR);
676 strcpy(errstr + len, APR_EOL_STR);
677 apr_file_puts(errstr, logf);
678 apr_file_flush(logf);
682 syslog(level_and_mask, "%s", errstr);
686 ap_run_error_log(file, line, level, status, s, r, pool, errstr + errstrlen);
689 AP_DECLARE(void) ap_log_error(const char *file, int line, int level,
690 apr_status_t status, const server_rec *s,
691 const char *fmt, ...)
696 log_error_core(file, line, level, status, s, NULL, NULL, NULL, fmt, args);
700 AP_DECLARE(void) ap_log_perror(const char *file, int line, int level,
701 apr_status_t status, apr_pool_t *p,
702 const char *fmt, ...)
707 log_error_core(file, line, level, status, NULL, NULL, NULL, p, fmt, args);
711 AP_DECLARE(void) ap_log_rerror(const char *file, int line, int level,
712 apr_status_t status, const request_rec *r,
713 const char *fmt, ...)
718 log_error_core(file, line, level, status, r->server, NULL, r, NULL, fmt,
722 * IF APLOG_TOCLIENT is set,
723 * AND the error level is 'warning' or more severe,
724 * AND there isn't already error text associated with this request,
725 * THEN make the message text available to ErrorDocument and
726 * other error processors.
730 if ((level & APLOG_TOCLIENT)
731 && ((level & APLOG_LEVELMASK) <= APLOG_WARNING)
732 && (apr_table_get(r->notes, "error-notes") == NULL)) {
733 apr_table_setn(r->notes, "error-notes",
734 ap_escape_html(r->pool, apr_pvsprintf(r->pool, fmt,
740 AP_DECLARE(void) ap_log_cerror(const char *file, int line, int level,
741 apr_status_t status, const conn_rec *c,
742 const char *fmt, ...)
747 log_error_core(file, line, level, status, c->base_server, c, NULL, NULL,
752 AP_DECLARE(void) ap_log_pid(apr_pool_t *p, const char *filename)
754 apr_file_t *pid_file = NULL;
756 static pid_t saved_pid = -1;
765 fname = ap_server_root_relative(p, filename);
767 ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT, APR_EBADPATH,
768 NULL, "Invalid PID file path %s, ignoring.", filename);
773 if (mypid != saved_pid
774 && apr_stat(&finfo, fname, APR_FINFO_MTIME, p) == APR_SUCCESS) {
775 /* AP_SIG_GRACEFUL and HUP call this on each restart.
776 * Only warn on first time through for this pid.
778 * XXX: Could just write first time through too, although
779 * that may screw up scripts written to do something
780 * based on the last modification time of the pid file.
782 ap_log_perror(APLOG_MARK, APLOG_WARNING, 0, p,
783 "pid file %s overwritten -- Unclean "
784 "shutdown of previous Apache run?",
788 if ((rv = apr_file_open(&pid_file, fname,
789 APR_WRITE | APR_CREATE | APR_TRUNCATE,
790 APR_UREAD | APR_UWRITE | APR_GREAD | APR_WREAD, p))
792 ap_log_error(APLOG_MARK, APLOG_ERR, rv, NULL,
793 "could not create %s", fname);
794 ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL,
795 "%s: could not log pid to file %s",
796 ap_server_argv0, fname);
799 apr_file_printf(pid_file, "%ld" APR_EOL_STR, (long)mypid);
800 apr_file_close(pid_file);
804 AP_DECLARE(apr_status_t) ap_read_pid(apr_pool_t *p, const char *filename,
807 const apr_size_t BUFFER_SIZE = sizeof(long) * 3 + 2; /* see apr_ltoa */
808 apr_file_t *pid_file = NULL;
812 apr_size_t bytes_read;
818 fname = ap_server_root_relative(p, filename);
820 ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT, APR_EBADPATH,
821 NULL, "Invalid PID file path %s, ignoring.", filename);
825 rv = apr_file_open(&pid_file, fname, APR_READ, APR_OS_DEFAULT, p);
826 if (rv != APR_SUCCESS) {
830 buf = apr_palloc(p, BUFFER_SIZE);
832 rv = apr_file_read_full(pid_file, buf, BUFFER_SIZE - 1, &bytes_read);
833 if (rv != APR_SUCCESS && rv != APR_EOF) {
837 /* If we fill the buffer, we're probably reading a corrupt pid file.
838 * To be nice, let's also ensure the first char is a digit. */
839 if (bytes_read == 0 || bytes_read == BUFFER_SIZE - 1 || !apr_isdigit(*buf)) {
843 buf[bytes_read] = '\0';
844 *mypid = strtol(buf, &endptr, 10);
846 apr_file_close(pid_file);
850 AP_DECLARE(void) ap_log_assert(const char *szExp, const char *szFile,
853 char time_str[APR_CTIME_LEN];
855 apr_ctime(time_str, apr_time_now());
856 ap_log_error(APLOG_MARK, APLOG_CRIT, 0, NULL,
857 "[%s] file %s, line %d, assertion \"%s\" failed",
858 time_str, szFile, nLine, szExp);
862 /* unix assert does an abort leading to a core dump */
867 /* piped log support */
869 #ifdef AP_HAVE_RELIABLE_PIPED_LOGS
870 /* forward declaration */
871 static void piped_log_maintenance(int reason, void *data, apr_wait_t status);
873 /* Spawn the piped logger process pl->program. */
874 static apr_status_t piped_log_spawn(piped_log *pl)
876 apr_procattr_t *procattr;
877 apr_proc_t *procnew = NULL;
880 if (((status = apr_procattr_create(&procattr, pl->p)) != APR_SUCCESS) ||
881 ((status = apr_procattr_cmdtype_set(procattr,
882 APR_SHELLCMD_ENV)) != APR_SUCCESS) ||
883 ((status = apr_procattr_child_in_set(procattr,
884 ap_piped_log_read_fd(pl),
885 ap_piped_log_write_fd(pl)))
887 ((status = apr_procattr_child_errfn_set(procattr, log_child_errfn))
889 ((status = apr_procattr_error_check_set(procattr, 1)) != APR_SUCCESS)) {
891 /* Something bad happened, give up and go away. */
892 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
893 "piped_log_spawn: unable to setup child process '%s': %s",
894 pl->program, apr_strerror(status, buf, sizeof(buf)));
900 apr_tokenize_to_argv(pl->program, &args, pl->p);
901 pname = apr_pstrdup(pl->p, args[0]);
902 procnew = apr_pcalloc(pl->p, sizeof(apr_proc_t));
903 status = apr_proc_create(procnew, pname, (const char * const *) args,
904 NULL, procattr, pl->p);
906 if (status == APR_SUCCESS) {
908 /* procnew->in was dup2'd from ap_piped_log_write_fd(pl);
909 * since the original fd is still valid, close the copy to
911 apr_file_close(procnew->in);
913 apr_proc_other_child_register(procnew, piped_log_maintenance, pl,
914 ap_piped_log_write_fd(pl), pl->p);
915 close_handle_in_child(pl->p, ap_piped_log_read_fd(pl));
919 /* Something bad happened, give up and go away. */
920 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
921 "unable to start piped log program '%s': %s",
922 pl->program, apr_strerror(status, buf, sizeof(buf)));
930 static void piped_log_maintenance(int reason, void *data, apr_wait_t status)
932 piped_log *pl = data;
937 case APR_OC_REASON_DEATH:
938 case APR_OC_REASON_LOST:
939 pl->pid = NULL; /* in case we don't get it going again, this
940 * tells other logic not to try to kill it
942 apr_proc_other_child_unregister(pl);
943 stats = ap_mpm_query(AP_MPMQ_MPM_STATE, &mpm_state);
944 if (stats != APR_SUCCESS) {
945 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
946 "can't query MPM state; not restarting "
947 "piped log program '%s'",
950 else if (mpm_state != AP_MPMQ_STOPPING) {
951 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
952 "piped log program '%s' failed unexpectedly",
954 if ((stats = piped_log_spawn(pl)) != APR_SUCCESS) {
955 /* what can we do? This could be the error log we're having
956 * problems opening up... */
958 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
959 "piped_log_maintenance: unable to respawn '%s': %s",
960 pl->program, apr_strerror(stats, buf, sizeof(buf)));
965 case APR_OC_REASON_UNWRITABLE:
966 /* We should not kill off the pipe here, since it may only be full.
967 * If it really is locked, we should kill it off manually. */
970 case APR_OC_REASON_RESTART:
971 if (pl->pid != NULL) {
972 apr_proc_kill(pl->pid, SIGTERM);
977 case APR_OC_REASON_UNREGISTER:
983 static apr_status_t piped_log_cleanup_for_exec(void *data)
985 piped_log *pl = data;
987 apr_file_close(ap_piped_log_read_fd(pl));
988 apr_file_close(ap_piped_log_write_fd(pl));
993 static apr_status_t piped_log_cleanup(void *data)
995 piped_log *pl = data;
997 if (pl->pid != NULL) {
998 apr_proc_kill(pl->pid, SIGTERM);
1000 return piped_log_cleanup_for_exec(data);
1004 AP_DECLARE(piped_log *) ap_open_piped_log(apr_pool_t *p, const char *program)
1008 pl = apr_palloc(p, sizeof (*pl));
1010 pl->program = apr_pstrdup(p, program);
1012 if (apr_file_pipe_create_ex(&ap_piped_log_read_fd(pl),
1013 &ap_piped_log_write_fd(pl),
1014 APR_FULL_BLOCK, p) != APR_SUCCESS) {
1017 apr_pool_cleanup_register(p, pl, piped_log_cleanup,
1018 piped_log_cleanup_for_exec);
1019 if (piped_log_spawn(pl) != APR_SUCCESS) {
1020 apr_pool_cleanup_kill(p, pl, piped_log_cleanup);
1021 apr_file_close(ap_piped_log_read_fd(pl));
1022 apr_file_close(ap_piped_log_write_fd(pl));
1028 #else /* !AP_HAVE_RELIABLE_PIPED_LOGS */
1030 static apr_status_t piped_log_cleanup(void *data)
1032 piped_log *pl = data;
1034 apr_file_close(ap_piped_log_write_fd(pl));
1038 AP_DECLARE(piped_log *) ap_open_piped_log(apr_pool_t *p, const char *program)
1041 apr_file_t *dummy = NULL;
1044 rc = log_child(p, program, &dummy, 0);
1045 if (rc != APR_SUCCESS) {
1046 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
1047 "Couldn't start piped log process");
1051 pl = apr_palloc(p, sizeof (*pl));
1053 ap_piped_log_read_fd(pl) = NULL;
1054 ap_piped_log_write_fd(pl) = dummy;
1055 apr_pool_cleanup_register(p, pl, piped_log_cleanup, piped_log_cleanup);
1062 AP_DECLARE(void) ap_close_piped_log(piped_log *pl)
1064 apr_pool_cleanup_run(pl->p, pl, piped_log_cleanup);
1067 AP_IMPLEMENT_HOOK_VOID(error_log,
1068 (const char *file, int line, int level,
1069 apr_status_t status, const server_rec *s,
1070 const request_rec *r, apr_pool_t *pool,
1071 const char *errstr), (file, line, level,
1072 status, s, r, pool, errstr))