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 /* wrap a piped_log* with additional info
145 * about special stderr treatment used for main
147 typedef struct piped_log_wrapper {
152 /* track pipe handles to close in child process */
153 typedef struct read_handle_t {
154 struct read_handle_t *next;
158 static read_handle_t *read_handles;
160 /* clear_handle_list() is called when plog is cleared; at that
161 * point we need to forget about our old list of pipe read
162 * handles. We let the plog cleanups close the actual pipes.
164 static apr_status_t clear_handle_list(void *v)
170 /* remember to close this handle in the child process
172 * On Win32 this makes zero sense, because we don't
173 * take the parent process's child procs.
174 * If the win32 parent instead passed each and every
175 * logger write handle from itself down to the child,
176 * and the parent manages all aspects of keeping the
177 * reliable pipe log children alive, this would still
178 * make no sense :) Cripple it on Win32.
180 static void close_handle_in_child(apr_pool_t *p, apr_file_t *f)
183 read_handle_t *new_handle;
185 new_handle = apr_pcalloc(p, sizeof(read_handle_t));
186 new_handle->next = read_handles;
187 new_handle->handle = f;
188 read_handles = new_handle;
192 void ap_logs_child_init(apr_pool_t *p, server_rec *s)
194 read_handle_t *cur = read_handles;
197 apr_file_close(cur->handle);
202 AP_DECLARE(void) ap_open_stderr_log(apr_pool_t *p)
204 apr_file_open_stderr(&stderr_log, p);
207 AP_DECLARE(apr_status_t) ap_replace_stderr_log(apr_pool_t *p,
210 apr_file_t *stderr_file;
212 char *filename = ap_server_root_relative(p, fname);
214 ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT,
215 APR_EBADPATH, NULL, "Invalid -E error log file %s",
219 if ((rc = apr_file_open(&stderr_file, filename,
220 APR_APPEND | APR_WRITE | APR_CREATE | APR_LARGEFILE,
221 APR_OS_DEFAULT, p)) != APR_SUCCESS) {
222 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
223 "%s: could not open error log file %s.",
224 ap_server_argv0, fname);
228 /* This is safe provided we revert it when we are finished.
229 * We don't manager the callers pool!
233 if ((rc = apr_file_open_stderr(&stderr_log, stderr_pool))
235 apr_file_flush(stderr_log);
236 if ((rc = apr_file_dup2(stderr_log, stderr_file, stderr_pool))
238 apr_file_close(stderr_file);
240 * You might ponder why stderr_pool should survive?
241 * The trouble is, stderr_pool may have s_main->error_log,
242 * so we aren't in a position to destory stderr_pool until
243 * the next recycle. There's also an apparent bug which
244 * is not; if some folk decided to call this function before
245 * the core open error logs hook, this pool won't survive.
246 * Neither does the stderr logger, so this isn't a problem.
250 /* Revert, see above */
251 if (stderr_pool == p)
254 if (rc != APR_SUCCESS) {
255 ap_log_error(APLOG_MARK, APLOG_CRIT, rc, NULL,
256 "unable to replace stderr with error log file");
261 static void log_child_errfn(apr_pool_t *pool, apr_status_t err,
262 const char *description)
264 ap_log_error(APLOG_MARK, APLOG_ERR, err, NULL,
268 #ifndef AP_HAVE_RELIABLE_PIPED_LOGS
269 /* Create a child process running PROGNAME with a pipe connected to
270 * the childs stdin. The write-end of the pipe will be placed in
271 * *FPIN on successful return. If dummy_stderr is non-zero, the
272 * stderr for the child will be the same as the stdout of the parent.
273 * Otherwise the child will inherit the stderr from the parent. */
274 static int log_child(apr_pool_t *p, const char *progname,
275 apr_file_t **fpin, int dummy_stderr)
277 /* Child process code for 'ErrorLog "|..."';
278 * may want a common framework for this, since I expect it will
279 * be common for other foo-loggers to want this sort of thing...
282 apr_procattr_t *procattr;
286 if (((rc = apr_procattr_create(&procattr, p)) == APR_SUCCESS)
287 && ((rc = apr_procattr_cmdtype_set(procattr,
288 APR_SHELLCMD_ENV)) == APR_SUCCESS)
289 && ((rc = apr_procattr_io_set(procattr,
292 APR_NO_PIPE)) == APR_SUCCESS)
293 && ((rc = apr_procattr_error_check_set(procattr, 1)) == APR_SUCCESS)
294 && ((rc = apr_procattr_child_errfn_set(procattr, log_child_errfn))
299 apr_tokenize_to_argv(progname, &args, p);
300 pname = apr_pstrdup(p, args[0]);
301 procnew = (apr_proc_t *)apr_pcalloc(p, sizeof(*procnew));
304 if ((rc = apr_file_open_stdout(&errfile, p)) == APR_SUCCESS)
305 rc = apr_procattr_child_err_set(procattr, errfile, NULL);
308 rc = apr_proc_create(procnew, pname, (const char * const *)args,
311 if (rc == APR_SUCCESS) {
312 apr_pool_note_subprocess(p, procnew, APR_KILL_AFTER_TIMEOUT);
313 (*fpin) = procnew->in;
314 /* read handle to pipe not kept open, so no need to call
315 * close_handle_in_child()
324 /* forward declaration */
325 static piped_log* piped_log_open(apr_pool_t *p, const char *program,
328 /* Open the error log for the given server_rec. If IS_MAIN is
329 * non-zero, s is the main server. */
330 static int open_error_log(server_rec *s, int is_main, apr_pool_t *p)
335 if (*s->error_fname == '|') {
337 fname = ap_server_root_relative(p, s->error_fname + 1);
340 ap_log_error(APLOG_MARK, APLOG_STARTUP, APR_EBADPATH, NULL,
341 "%s: Invalid error log path '%s'.",
342 ap_server_argv0, s->error_fname);
346 /* Spawn a new child logger. If this is the main server_rec,
347 * the new child must use a dummy stderr since the current
348 * stderr might be a pipe to the old logger. Otherwise, the
349 * child inherits the parents stderr. */
350 pl = piped_log_open(p, fname, is_main);
352 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
353 "%s: Couldn't start ErrorLog process '%s'.",
354 ap_server_argv0, fname);
357 s->error_log = ap_piped_log_write_fd(pl);
361 else if (!strncasecmp(s->error_fname, "syslog", 6)) {
362 if ((fname = strchr(s->error_fname, ':'))) {
366 for (fac = facilities; fac->t_name; fac++) {
367 if (!strcasecmp(fname, fac->t_name)) {
368 openlog(ap_server_argv0, LOG_NDELAY|LOG_CONS|LOG_PID,
376 openlog(ap_server_argv0, LOG_NDELAY|LOG_CONS|LOG_PID, LOG_LOCAL7);
383 fname = ap_server_root_relative(p, s->error_fname);
385 ap_log_error(APLOG_MARK, APLOG_STARTUP, APR_EBADPATH, NULL,
386 "%s: Invalid error log path '%s'.",
387 ap_server_argv0, s->error_fname);
390 if ((rc = apr_file_open(&s->error_log, fname,
391 APR_APPEND | APR_WRITE | APR_CREATE | APR_LARGEFILE,
392 APR_OS_DEFAULT, p)) != APR_SUCCESS) {
393 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
394 "%s: could not open error log file '%s'.",
395 ap_server_argv0, fname);
403 int ap_open_logs(apr_pool_t *pconf, apr_pool_t *p /* plog */,
404 apr_pool_t *ptemp, server_rec *s_main)
406 apr_pool_t *stderr_p;
407 server_rec *virt, *q;
411 /* Register to throw away the read_handles list when we
412 * cleanup plog. Upon fork() for the apache children,
413 * this read_handles list is closed so only the parent
414 * can relaunch a lost log child. These read handles
415 * are always closed on exec.
416 * We won't care what happens to our stderr log child
417 * between log phases, so we don't mind losing stderr's
418 * read_handle a little bit early.
420 apr_pool_cleanup_register(p, NULL, clear_handle_list,
421 apr_pool_cleanup_null);
423 /* HERE we need a stdout log that outlives plog.
424 * We *presume* the parent of plog is a process
425 * or global pool which spans server restarts.
426 * Create our stderr_pool as a child of the plog's
429 apr_pool_create(&stderr_p, apr_pool_parent_get(p));
430 apr_pool_tag(stderr_p, "stderr_pool");
432 if (open_error_log(s_main, 1, stderr_p) != OK) {
437 if (s_main->error_log) {
440 /* Replace existing stderr with new log. */
441 apr_file_flush(s_main->error_log);
442 rv = apr_file_dup2(stderr_log, s_main->error_log, stderr_p);
443 if (rv != APR_SUCCESS) {
444 ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s_main,
445 "unable to replace stderr with error_log");
448 /* We are done with stderr_pool, close it, killing
449 * the previous generation's stderr logger
452 apr_pool_destroy(stderr_pool);
453 stderr_pool = stderr_p;
456 * Now that we have dup'ed s_main->error_log to stderr_log
457 * close it and set s_main->error_log to stderr_log. This avoids
458 * this fd being inherited by the next piped logger who would
459 * keep open the writing end of the pipe that this one uses
460 * as stdin. This in turn would prevent the piped logger from
463 apr_file_close(s_main->error_log);
464 s_main->error_log = stderr_log;
467 /* note that stderr may still need to be replaced with something
468 * because it points to the old error log, or back to the tty
470 * XXX: This is BS - /dev/null is non-portable
472 if (replace_stderr && freopen("/dev/null", "w", stderr) == NULL) {
473 ap_log_error(APLOG_MARK, APLOG_CRIT, errno, s_main,
474 "unable to replace stderr with /dev/null");
477 for (virt = s_main->next; virt; virt = virt->next) {
478 if (virt->error_fname) {
479 for (q=s_main; q != virt; q = q->next) {
480 if (q->error_fname != NULL
481 && strcmp(q->error_fname, virt->error_fname) == 0) {
487 if (open_error_log(virt, 0, p) != OK) {
492 virt->error_log = q->error_log;
496 virt->error_log = s_main->error_log;
502 AP_DECLARE(void) ap_error_log2stderr(server_rec *s) {
503 apr_file_t *errfile = NULL;
505 apr_file_open_stderr(&errfile, s->process->pool);
506 if (s->error_log != NULL) {
507 apr_file_dup2(s->error_log, errfile, s->process->pool);
511 static void log_error_core(const char *file, int line, int level,
512 apr_status_t status, const server_rec *s,
514 const request_rec *r, apr_pool_t *pool,
515 const char *fmt, va_list args)
517 char errstr[MAX_STRING_LEN];
518 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
519 char scratch[MAX_STRING_LEN];
521 apr_size_t len, errstrlen;
522 apr_file_t *logf = NULL;
524 int level_and_mask = level & APLOG_LEVELMASK;
526 if (r && r->connection) {
532 * If we are doing stderr logging (startup), don't log messages that are
533 * above the default server log level unless it is a startup/shutdown
537 if ((level_and_mask != APLOG_NOTICE)
538 && (level_and_mask > ap_default_loglevel)) {
545 else if (s->error_log) {
547 * If we are doing normal logging, don't log messages that are
548 * above the server log level unless it is a startup/shutdown notice
550 if ((level_and_mask != APLOG_NOTICE)
551 && (level_and_mask > s->loglevel)) {
558 else if (tpf_child) {
560 * If we are doing normal logging, don't log messages that are
561 * above the server log level unless it is a startup/shutdown notice
563 if ((level_and_mask != APLOG_NOTICE)
564 && (level_and_mask > s->loglevel)) {
573 * If we are doing syslog logging, don't log messages that are
574 * above the server log level (including a startup/shutdown notice)
576 if (level_and_mask > s->loglevel) {
581 if (logf && ((level & APLOG_STARTUP) != APLOG_STARTUP)) {
583 ap_recent_ctime(errstr + 1, apr_time_now());
584 errstr[1 + APR_CTIME_LEN - 1] = ']';
585 errstr[1 + APR_CTIME_LEN ] = ' ';
586 len = 1 + APR_CTIME_LEN + 1;
591 if ((level & APLOG_STARTUP) != APLOG_STARTUP) {
592 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
593 "[%s] ", priorities[level_and_mask].t_name);
597 if (file && level_and_mask == APLOG_DEBUG) {
598 #if defined(_OSD_POSIX) || defined(WIN32) || defined(__MVS__)
600 char *e = strrchr(file, '/');
603 e = strrchr(file, '\\');
607 /* In OSD/POSIX, the compiler returns for __FILE__
608 * a string like: __FILE__="*POSIX(/usr/include/stdio.h)"
609 * (it even returns an absolute path for sources in
610 * the current directory). Here we try to strip this
611 * down to the basename.
613 if (e != NULL && e[1] != '\0') {
614 apr_snprintf(tmp, sizeof(tmp), "%s", &e[1]);
615 e = &tmp[strlen(tmp)-1];
621 #else /* _OSD_POSIX || WIN32 */
623 /* On Unix, __FILE__ may be an absolute path in a
625 if (file[0] == '/' && (p = ap_strrchr_c(file, '/')) != NULL) {
628 #endif /*_OSD_POSIX || WIN32 */
629 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
630 "%s(%d): ", file, line);
635 /* XXX: TODO: add a method of selecting whether logged client
636 * addresses are in dotted quad or resolved form... dotted
637 * quad is the most secure, which is why I'm implementing it
640 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
641 "[client %s] ", c->remote_ip);
644 if (status < APR_OS_START_EAIERR) {
645 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
648 else if (status < APR_OS_START_SYSERR) {
649 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
650 "(EAI %d)", status - APR_OS_START_EAIERR);
652 else if (status < 100000 + APR_OS_START_SYSERR) {
653 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
654 "(OS %d)", status - APR_OS_START_SYSERR);
657 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
658 "(os 0x%08x)", status - APR_OS_START_SYSERR);
660 apr_strerror(status, errstr + len, MAX_STRING_LEN - len);
661 len += strlen(errstr + len);
662 if (MAX_STRING_LEN - len > 2) {
670 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
671 if (apr_vsnprintf(scratch, MAX_STRING_LEN - len, fmt, args)) {
672 len += ap_escape_errorlog_item(errstr + len, scratch,
673 MAX_STRING_LEN - len);
676 len += apr_vsnprintf(errstr + len, MAX_STRING_LEN - len, fmt, args);
679 if ( r && (referer = apr_table_get(r->headers_in, "Referer"))
680 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
681 && ap_escape_errorlog_item(scratch, referer, MAX_STRING_LEN - len)
684 len += apr_snprintf(errstr + len, MAX_STRING_LEN - len,
686 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
694 /* NULL if we are logging to syslog */
696 /* Truncate for the terminator (as apr_snprintf does) */
697 if (len > MAX_STRING_LEN - sizeof(APR_EOL_STR)) {
698 len = MAX_STRING_LEN - sizeof(APR_EOL_STR);
700 strcpy(errstr + len, APR_EOL_STR);
701 apr_file_puts(errstr, logf);
702 apr_file_flush(logf);
706 syslog(level_and_mask, "%s", errstr);
710 ap_run_error_log(file, line, level, status, s, r, pool, errstr + errstrlen);
713 AP_DECLARE(void) ap_log_error(const char *file, int line, int level,
714 apr_status_t status, const server_rec *s,
715 const char *fmt, ...)
720 log_error_core(file, line, level, status, s, NULL, NULL, NULL, fmt, args);
724 AP_DECLARE(void) ap_log_perror(const char *file, int line, int level,
725 apr_status_t status, apr_pool_t *p,
726 const char *fmt, ...)
731 log_error_core(file, line, level, status, NULL, NULL, NULL, p, fmt, args);
735 AP_DECLARE(void) ap_log_rerror(const char *file, int line, int level,
736 apr_status_t status, const request_rec *r,
737 const char *fmt, ...)
742 log_error_core(file, line, level, status, r->server, NULL, r, NULL, fmt,
746 * IF APLOG_TOCLIENT is set,
747 * AND the error level is 'warning' or more severe,
748 * AND there isn't already error text associated with this request,
749 * THEN make the message text available to ErrorDocument and
750 * other error processors.
754 if ((level & APLOG_TOCLIENT)
755 && ((level & APLOG_LEVELMASK) <= APLOG_WARNING)
756 && (apr_table_get(r->notes, "error-notes") == NULL)) {
757 apr_table_setn(r->notes, "error-notes",
758 ap_escape_html(r->pool, apr_pvsprintf(r->pool, fmt,
764 AP_DECLARE(void) ap_log_cerror(const char *file, int line, int level,
765 apr_status_t status, const conn_rec *c,
766 const char *fmt, ...)
771 log_error_core(file, line, level, status, c->base_server, c, NULL, NULL,
776 AP_DECLARE(void) ap_log_pid(apr_pool_t *p, const char *filename)
778 apr_file_t *pid_file = NULL;
780 static pid_t saved_pid = -1;
789 fname = ap_server_root_relative(p, filename);
791 ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT, APR_EBADPATH,
792 NULL, "Invalid PID file path %s, ignoring.", filename);
797 if (mypid != saved_pid
798 && apr_stat(&finfo, fname, APR_FINFO_MTIME, p) == APR_SUCCESS) {
799 /* AP_SIG_GRACEFUL and HUP call this on each restart.
800 * Only warn on first time through for this pid.
802 * XXX: Could just write first time through too, although
803 * that may screw up scripts written to do something
804 * based on the last modification time of the pid file.
806 ap_log_perror(APLOG_MARK, APLOG_WARNING, 0, p,
807 "pid file %s overwritten -- Unclean "
808 "shutdown of previous Apache run?",
812 if ((rv = apr_file_open(&pid_file, fname,
813 APR_WRITE | APR_CREATE | APR_TRUNCATE,
814 APR_UREAD | APR_UWRITE | APR_GREAD | APR_WREAD, p))
816 ap_log_error(APLOG_MARK, APLOG_ERR, rv, NULL,
817 "could not create %s", fname);
818 ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL,
819 "%s: could not log pid to file %s",
820 ap_server_argv0, fname);
823 apr_file_printf(pid_file, "%ld" APR_EOL_STR, (long)mypid);
824 apr_file_close(pid_file);
828 AP_DECLARE(apr_status_t) ap_read_pid(apr_pool_t *p, const char *filename,
831 const apr_size_t BUFFER_SIZE = sizeof(long) * 3 + 2; /* see apr_ltoa */
832 apr_file_t *pid_file = NULL;
836 apr_size_t bytes_read;
842 fname = ap_server_root_relative(p, filename);
844 ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT, APR_EBADPATH,
845 NULL, "Invalid PID file path %s, ignoring.", filename);
849 rv = apr_file_open(&pid_file, fname, APR_READ, APR_OS_DEFAULT, p);
850 if (rv != APR_SUCCESS) {
854 buf = apr_palloc(p, BUFFER_SIZE);
856 rv = apr_file_read_full(pid_file, buf, BUFFER_SIZE - 1, &bytes_read);
857 if (rv != APR_SUCCESS && rv != APR_EOF) {
861 /* If we fill the buffer, we're probably reading a corrupt pid file.
862 * To be nice, let's also ensure the first char is a digit. */
863 if (bytes_read == 0 || bytes_read == BUFFER_SIZE - 1 || !apr_isdigit(*buf)) {
867 buf[bytes_read] = '\0';
868 *mypid = strtol(buf, &endptr, 10);
870 apr_file_close(pid_file);
874 AP_DECLARE(void) ap_log_assert(const char *szExp, const char *szFile,
877 char time_str[APR_CTIME_LEN];
879 apr_ctime(time_str, apr_time_now());
880 ap_log_error(APLOG_MARK, APLOG_CRIT, 0, NULL,
881 "[%s] file %s, line %d, assertion \"%s\" failed",
882 time_str, szFile, nLine, szExp);
886 /* unix assert does an abort leading to a core dump */
891 /* piped log support */
893 AP_DECLARE(piped_log *) ap_open_piped_log(apr_pool_t *p, const char *program)
895 return piped_log_open(p, program, 0);
898 #ifdef AP_HAVE_RELIABLE_PIPED_LOGS
899 /* forward declaration */
900 static void piped_log_maintenance(int reason, void *data, apr_wait_t status);
902 /* Spawn the piped logger process pl->program. */
903 static apr_status_t piped_log_spawn(piped_log_wrapper *plw)
905 apr_procattr_t *procattr;
906 apr_proc_t *procnew = NULL;
909 piped_log *pl = plw->pl;
911 if (((status = apr_procattr_create(&procattr, pl->p)) != APR_SUCCESS) ||
912 ((status = apr_procattr_cmdtype_set(procattr,
913 APR_SHELLCMD_ENV)) != APR_SUCCESS) ||
914 ((status = apr_procattr_child_in_set(procattr,
915 ap_piped_log_read_fd(pl),
916 ap_piped_log_write_fd(pl)))
918 /* If special_stderr is non-zero, the stderr for the child will
919 * be the same as the stdout of the parent. Otherwise the child
920 * will inherit the stderr from the parent. */
921 (plw->special_stderr && (status = apr_file_open_stdout(&errfile, pl->p))
923 (plw->special_stderr && (status = apr_procattr_child_err_set(procattr,
926 ((status = apr_procattr_child_errfn_set(procattr, log_child_errfn))
928 ((status = apr_procattr_error_check_set(procattr, 1)) != APR_SUCCESS)) {
930 /* Something bad happened, give up and go away. */
931 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
932 "piped_log_spawn: unable to setup child process '%s': %s",
933 pl->program, apr_strerror(status, buf, sizeof(buf)));
940 apr_tokenize_to_argv(pl->program, &args, pl->p);
941 pname = apr_pstrdup(pl->p, args[0]);
942 procnew = apr_pcalloc(pl->p, sizeof(apr_proc_t));
943 status = apr_proc_create(procnew, pname, (const char * const *) args,
944 NULL, procattr, pl->p);
946 if (status == APR_SUCCESS) {
948 /* procnew->in was dup2'd from ap_piped_log_write_fd(pl);
949 * since the original fd is still valid, close the copy to
951 apr_file_close(procnew->in);
953 apr_proc_other_child_register(procnew, piped_log_maintenance, plw,
954 ap_piped_log_write_fd(pl), pl->p);
955 close_handle_in_child(pl->p, ap_piped_log_read_fd(pl));
959 /* Something bad happened, give up and go away. */
960 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
961 "unable to start piped log program '%s': %s",
962 pl->program, apr_strerror(status, buf, sizeof(buf)));
970 static void piped_log_maintenance(int reason, void *data, apr_wait_t status)
972 piped_log_wrapper *plw = data;
973 piped_log *pl = plw->pl;
978 case APR_OC_REASON_DEATH:
979 case APR_OC_REASON_LOST:
980 pl->pid = NULL; /* in case we don't get it going again, this
981 * tells other logic not to try to kill it
983 apr_proc_other_child_unregister(plw);
984 stats = ap_mpm_query(AP_MPMQ_MPM_STATE, &mpm_state);
985 if (stats != APR_SUCCESS) {
986 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
987 "can't query MPM state; not restarting "
988 "piped log program '%s'",
991 else if (mpm_state != AP_MPMQ_STOPPING) {
992 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
993 "piped log program '%s' failed unexpectedly",
996 /* If special_stderr is non-zero, we need to get the write
997 * end of the pipe back from stderr before spawning. */
998 if ((plw->special_stderr && (stats = apr_file_dup(&ap_piped_log_write_fd(pl),
1001 ((stats = piped_log_spawn(plw)) != APR_SUCCESS) ||
1002 /* If special_stderr is non-zero, we need to close the write
1003 * end of the pipe after spawning, because we write to it via
1005 (plw->special_stderr && (stats = apr_file_close(ap_piped_log_write_fd(pl)))
1010 /* what can we do? This could be the error log we're having
1011 * problems opening up... */
1012 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
1013 "piped_log_maintenance: unable to respawn '%s': %s",
1014 pl->program, apr_strerror(stats, buf, sizeof(buf)));
1019 case APR_OC_REASON_UNWRITABLE:
1020 /* We should not kill off the pipe here, since it may only be full.
1021 * If it really is locked, we should kill it off manually. */
1024 case APR_OC_REASON_RESTART:
1025 if (pl->pid != NULL) {
1026 apr_proc_kill(pl->pid, SIGTERM);
1031 case APR_OC_REASON_UNREGISTER:
1037 static apr_status_t piped_log_cleanup_for_exec(void *data)
1039 piped_log *pl = data;
1041 apr_file_close(ap_piped_log_read_fd(pl));
1042 apr_file_close(ap_piped_log_write_fd(pl));
1047 static apr_status_t piped_log_cleanup(void *data)
1049 piped_log *pl = data;
1051 if (pl->pid != NULL) {
1052 apr_proc_kill(pl->pid, SIGTERM);
1054 return piped_log_cleanup_for_exec(data);
1058 static piped_log* piped_log_open(apr_pool_t *p, const char *program,
1062 piped_log_wrapper *plw;
1064 pl = apr_palloc(p, sizeof (*pl));
1066 pl->program = apr_pstrdup(p, program);
1068 plw = apr_palloc(p, sizeof (*plw));
1069 plw->special_stderr = special_stderr;
1071 if (apr_file_pipe_create_ex(&ap_piped_log_read_fd(pl),
1072 &ap_piped_log_write_fd(pl),
1073 APR_FULL_BLOCK, p) != APR_SUCCESS) {
1076 apr_pool_cleanup_register(p, pl, piped_log_cleanup,
1077 piped_log_cleanup_for_exec);
1078 if (piped_log_spawn(plw) != APR_SUCCESS) {
1079 apr_pool_cleanup_kill(p, pl, piped_log_cleanup);
1080 apr_file_close(ap_piped_log_read_fd(pl));
1081 apr_file_close(ap_piped_log_write_fd(pl));
1087 #else /* !AP_HAVE_RELIABLE_PIPED_LOGS */
1089 static apr_status_t piped_log_cleanup(void *data)
1091 piped_log *pl = data;
1093 apr_file_close(ap_piped_log_write_fd(pl));
1097 static piped_log* piped_log_open(apr_pool_t *p, const char *program,
1101 apr_file_t *dummy = NULL;
1104 rc = log_child(p, program, &dummy, special_stderr);
1105 if (rc != APR_SUCCESS) {
1106 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
1107 "Couldn't start piped log process for '%s'",
1108 (program == NULL) ? "NULL" : program);
1112 pl = apr_palloc(p, sizeof (*pl));
1114 ap_piped_log_read_fd(pl) = NULL;
1115 ap_piped_log_write_fd(pl) = dummy;
1116 apr_pool_cleanup_register(p, pl, piped_log_cleanup, piped_log_cleanup);
1123 AP_DECLARE(void) ap_close_piped_log(piped_log *pl)
1125 apr_pool_cleanup_run(pl->p, pl, piped_log_cleanup);
1128 AP_IMPLEMENT_HOOK_VOID(error_log,
1129 (const char *file, int line, int level,
1130 apr_status_t status, const server_rec *s,
1131 const request_rec *r, apr_pool_t *pool,
1132 const char *errstr), (file, line, level,
1133 status, s, r, pool, errstr))