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"
31 #include "apr_portable.h"
32 #include "apr_base64.h"
34 #define APR_WANT_STDIO
35 #define APR_WANT_STRFUNC
44 #if APR_HAVE_PROCESS_H
45 #include <process.h> /* for getpid() on Win32 */
48 #include "ap_config.h"
50 #include "http_config.h"
51 #include "http_core.h"
53 #include "http_main.h"
54 #include "util_time.h"
57 /* we know core's module_index is 0 */
58 #undef APLOG_MODULE_INDEX
59 #define APLOG_MODULE_INDEX AP_CORE_MODULE_INDEX
67 APR_HOOK_LINK(error_log)
68 APR_HOOK_LINK(generate_log_id)
71 int AP_DECLARE_DATA ap_default_loglevel = DEFAULT_LOGLEVEL;
75 static const TRANS facilities[] = {
78 {"authpriv",LOG_AUTHPRIV},
84 {"daemon", LOG_DAEMON},
102 {"syslog", LOG_SYSLOG},
111 {"local0", LOG_LOCAL0},
114 {"local1", LOG_LOCAL1},
117 {"local2", LOG_LOCAL2},
120 {"local3", LOG_LOCAL3},
123 {"local4", LOG_LOCAL4},
126 {"local5", LOG_LOCAL5},
129 {"local6", LOG_LOCAL6},
132 {"local7", LOG_LOCAL7},
138 static const TRANS priorities[] = {
139 {"emerg", APLOG_EMERG},
140 {"alert", APLOG_ALERT},
141 {"crit", APLOG_CRIT},
142 {"error", APLOG_ERR},
143 {"warn", APLOG_WARNING},
144 {"notice", APLOG_NOTICE},
145 {"info", APLOG_INFO},
146 {"debug", APLOG_DEBUG},
147 {"trace1", APLOG_TRACE1},
148 {"trace2", APLOG_TRACE2},
149 {"trace3", APLOG_TRACE3},
150 {"trace4", APLOG_TRACE4},
151 {"trace5", APLOG_TRACE5},
152 {"trace6", APLOG_TRACE6},
153 {"trace7", APLOG_TRACE7},
154 {"trace8", APLOG_TRACE8},
158 static apr_pool_t *stderr_pool = NULL;
160 static apr_file_t *stderr_log = NULL;
162 /* track pipe handles to close in child process */
163 typedef struct read_handle_t {
164 struct read_handle_t *next;
168 static read_handle_t *read_handles;
171 * @brief The piped logging structure.
173 * Piped logs are used to move functionality out of the main server.
174 * For example, log rotation is done with piped logs.
177 /** The pool to use for the piped log */
179 /** The pipe between the server and the logging process */
180 apr_file_t *read_fd, *write_fd;
181 #ifdef AP_HAVE_RELIABLE_PIPED_LOGS
182 /** The name of the program the logging process is running */
184 /** The pid of the logging process */
186 /** How to reinvoke program when it must be replaced */
187 apr_cmdtype_e cmdtype;
191 AP_DECLARE(apr_file_t *) ap_piped_log_read_fd(piped_log *pl)
196 AP_DECLARE(apr_file_t *) ap_piped_log_write_fd(piped_log *pl)
201 /* remember to close this handle in the child process
203 * On Win32 this makes zero sense, because we don't
204 * take the parent process's child procs.
205 * If the win32 parent instead passed each and every
206 * logger write handle from itself down to the child,
207 * and the parent manages all aspects of keeping the
208 * reliable pipe log children alive, this would still
209 * make no sense :) Cripple it on Win32.
211 static void close_handle_in_child(apr_pool_t *p, apr_file_t *f)
214 read_handle_t *new_handle;
216 new_handle = apr_pcalloc(p, sizeof(read_handle_t));
217 new_handle->next = read_handles;
218 new_handle->handle = f;
219 read_handles = new_handle;
223 void ap_logs_child_init(apr_pool_t *p, server_rec *s)
225 read_handle_t *cur = read_handles;
228 apr_file_close(cur->handle);
233 AP_DECLARE(void) ap_open_stderr_log(apr_pool_t *p)
235 apr_file_open_stderr(&stderr_log, p);
238 AP_DECLARE(apr_status_t) ap_replace_stderr_log(apr_pool_t *p,
241 apr_file_t *stderr_file;
243 char *filename = ap_server_root_relative(p, fname);
245 ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT,
246 APR_EBADPATH, NULL, "Invalid -E error log file %s",
250 if ((rc = apr_file_open(&stderr_file, filename,
251 APR_APPEND | APR_WRITE | APR_CREATE | APR_LARGEFILE,
252 APR_OS_DEFAULT, p)) != APR_SUCCESS) {
253 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
254 "%s: could not open error log file %s.",
255 ap_server_argv0, fname);
259 /* This is safe provided we revert it when we are finished.
260 * We don't manager the callers pool!
264 if ((rc = apr_file_open_stderr(&stderr_log, stderr_pool))
266 apr_file_flush(stderr_log);
267 if ((rc = apr_file_dup2(stderr_log, stderr_file, stderr_pool))
269 apr_file_close(stderr_file);
271 * You might ponder why stderr_pool should survive?
272 * The trouble is, stderr_pool may have s_main->error_log,
273 * so we aren't in a position to destory stderr_pool until
274 * the next recycle. There's also an apparent bug which
275 * is not; if some folk decided to call this function before
276 * the core open error logs hook, this pool won't survive.
277 * Neither does the stderr logger, so this isn't a problem.
281 /* Revert, see above */
282 if (stderr_pool == p)
285 if (rc != APR_SUCCESS) {
286 ap_log_error(APLOG_MARK, APLOG_CRIT, rc, NULL,
287 "unable to replace stderr with error log file");
292 static void log_child_errfn(apr_pool_t *pool, apr_status_t err,
293 const char *description)
295 ap_log_error(APLOG_MARK, APLOG_ERR, err, NULL,
299 /* Create a child process running PROGNAME with a pipe connected to
300 * the childs stdin. The write-end of the pipe will be placed in
301 * *FPIN on successful return. If dummy_stderr is non-zero, the
302 * stderr for the child will be the same as the stdout of the parent.
303 * Otherwise the child will inherit the stderr from the parent. */
304 static int log_child(apr_pool_t *p, const char *progname,
305 apr_file_t **fpin, apr_cmdtype_e cmdtype,
308 /* Child process code for 'ErrorLog "|..."';
309 * may want a common framework for this, since I expect it will
310 * be common for other foo-loggers to want this sort of thing...
313 apr_procattr_t *procattr;
317 if (((rc = apr_procattr_create(&procattr, p)) == APR_SUCCESS)
318 && ((rc = apr_procattr_dir_set(procattr,
319 ap_server_root)) == APR_SUCCESS)
320 && ((rc = apr_procattr_cmdtype_set(procattr, cmdtype)) == APR_SUCCESS)
321 && ((rc = apr_procattr_io_set(procattr,
324 APR_NO_PIPE)) == APR_SUCCESS)
325 && ((rc = apr_procattr_error_check_set(procattr, 1)) == APR_SUCCESS)
326 && ((rc = apr_procattr_child_errfn_set(procattr, log_child_errfn))
331 apr_tokenize_to_argv(progname, &args, p);
332 pname = apr_pstrdup(p, args[0]);
333 procnew = (apr_proc_t *)apr_pcalloc(p, sizeof(*procnew));
336 if ((rc = apr_file_open_stdout(&errfile, p)) == APR_SUCCESS)
337 rc = apr_procattr_child_err_set(procattr, errfile, NULL);
340 rc = apr_proc_create(procnew, pname, (const char * const *)args,
343 if (rc == APR_SUCCESS) {
344 apr_pool_note_subprocess(p, procnew, APR_KILL_AFTER_TIMEOUT);
345 (*fpin) = procnew->in;
346 /* read handle to pipe not kept open, so no need to call
347 * close_handle_in_child()
355 /* Open the error log for the given server_rec. If IS_MAIN is
356 * non-zero, s is the main server. */
357 static int open_error_log(server_rec *s, int is_main, apr_pool_t *p)
362 if (*s->error_fname == '|') {
363 apr_file_t *dummy = NULL;
364 apr_cmdtype_e cmdtype = APR_PROGRAM_ENV;
365 fname = s->error_fname + 1;
367 /* In 2.4 favor PROGRAM_ENV, accept "||prog" syntax for compatibility
368 * and "|$cmd" to override the default.
369 * Any 2.2 backport would continue to favor SHELLCMD_ENV so there
370 * accept "||prog" to override, and "|$cmd" to ease conversion.
375 cmdtype = APR_SHELLCMD_ENV;
379 /* Spawn a new child logger. If this is the main server_rec,
380 * the new child must use a dummy stderr since the current
381 * stderr might be a pipe to the old logger. Otherwise, the
382 * child inherits the parents stderr. */
383 rc = log_child(p, fname, &dummy, cmdtype, is_main);
384 if (rc != APR_SUCCESS) {
385 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
386 "Couldn't start ErrorLog process '%s'.",
391 s->error_log = dummy;
395 else if (!strncasecmp(s->error_fname, "syslog", 6)) {
396 if ((fname = strchr(s->error_fname, ':'))) {
400 for (fac = facilities; fac->t_name; fac++) {
401 if (!strcasecmp(fname, fac->t_name)) {
402 openlog(ap_server_argv0, LOG_NDELAY|LOG_CONS|LOG_PID,
410 openlog(ap_server_argv0, LOG_NDELAY|LOG_CONS|LOG_PID, LOG_LOCAL7);
417 fname = ap_server_root_relative(p, s->error_fname);
419 ap_log_error(APLOG_MARK, APLOG_STARTUP, APR_EBADPATH, NULL,
420 "%s: Invalid error log path %s.",
421 ap_server_argv0, s->error_fname);
424 if ((rc = apr_file_open(&s->error_log, fname,
425 APR_APPEND | APR_WRITE | APR_CREATE | APR_LARGEFILE,
426 APR_OS_DEFAULT, p)) != APR_SUCCESS) {
427 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
428 "%s: could not open error log file %s.",
429 ap_server_argv0, fname);
437 int ap_open_logs(apr_pool_t *pconf, apr_pool_t *p /* plog */,
438 apr_pool_t *ptemp, server_rec *s_main)
440 apr_pool_t *stderr_p;
441 server_rec *virt, *q;
445 /* Register to throw away the read_handles list when we
446 * cleanup plog. Upon fork() for the apache children,
447 * this read_handles list is closed so only the parent
448 * can relaunch a lost log child. These read handles
449 * are always closed on exec.
450 * We won't care what happens to our stderr log child
451 * between log phases, so we don't mind losing stderr's
452 * read_handle a little bit early.
454 apr_pool_cleanup_register(p, &read_handles, ap_pool_cleanup_set_null,
455 apr_pool_cleanup_null);
457 /* HERE we need a stdout log that outlives plog.
458 * We *presume* the parent of plog is a process
459 * or global pool which spans server restarts.
460 * Create our stderr_pool as a child of the plog's
463 apr_pool_create(&stderr_p, apr_pool_parent_get(p));
464 apr_pool_tag(stderr_p, "stderr_pool");
466 if (open_error_log(s_main, 1, stderr_p) != OK) {
471 if (s_main->error_log) {
474 /* Replace existing stderr with new log. */
475 apr_file_flush(s_main->error_log);
476 rv = apr_file_dup2(stderr_log, s_main->error_log, stderr_p);
477 if (rv != APR_SUCCESS) {
478 ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s_main,
479 "unable to replace stderr with error_log");
482 /* We are done with stderr_pool, close it, killing
483 * the previous generation's stderr logger
486 apr_pool_destroy(stderr_pool);
487 stderr_pool = stderr_p;
490 * Now that we have dup'ed s_main->error_log to stderr_log
491 * close it and set s_main->error_log to stderr_log. This avoids
492 * this fd being inherited by the next piped logger who would
493 * keep open the writing end of the pipe that this one uses
494 * as stdin. This in turn would prevent the piped logger from
497 apr_file_close(s_main->error_log);
498 s_main->error_log = stderr_log;
501 /* note that stderr may still need to be replaced with something
502 * because it points to the old error log, or back to the tty
504 * XXX: This is BS - /dev/null is non-portable
505 * errno-as-apr_status_t is also non-portable
507 if (replace_stderr && freopen("/dev/null", "w", stderr) == NULL) {
508 ap_log_error(APLOG_MARK, APLOG_CRIT, errno, s_main,
509 "unable to replace stderr with /dev/null");
512 for (virt = s_main->next; virt; virt = virt->next) {
513 if (virt->error_fname) {
514 for (q=s_main; q != virt; q = q->next) {
515 if (q->error_fname != NULL
516 && strcmp(q->error_fname, virt->error_fname) == 0) {
522 if (open_error_log(virt, 0, p) != OK) {
527 virt->error_log = q->error_log;
531 virt->error_log = s_main->error_log;
537 AP_DECLARE(void) ap_error_log2stderr(server_rec *s) {
538 apr_file_t *errfile = NULL;
540 apr_file_open_stderr(&errfile, s->process->pool);
541 if (s->error_log != NULL) {
542 apr_file_dup2(s->error_log, errfile, s->process->pool);
546 static int cpystrn(char *buf, const char *arg, int buflen)
551 end = apr_cpystrn(buf, arg, buflen);
556 static int log_remote_address(const ap_errorlog_info *info, const char *arg,
557 char *buf, int buflen)
560 return apr_snprintf(buf, buflen, "%s:%d", info->c->remote_ip,
561 info->c->remote_addr->port);
566 static int log_local_address(const ap_errorlog_info *info, const char *arg,
567 char *buf, int buflen)
570 return apr_snprintf(buf, buflen, "%s:%d", info->c->local_ip,
571 info->c->local_addr->port);
576 static int log_pid(const ap_errorlog_info *info, const char *arg,
577 char *buf, int buflen)
579 pid_t pid = getpid();
580 return apr_snprintf(buf, buflen, "%" APR_PID_T_FMT, pid);
583 static int log_tid(const ap_errorlog_info *info, const char *arg,
584 char *buf, int buflen)
589 if (ap_mpm_query(AP_MPMQ_IS_THREADED, &result) == APR_SUCCESS
590 && result != AP_MPMQ_NOT_SUPPORTED)
592 apr_os_thread_t tid = apr_os_thread_current();
593 return apr_snprintf(buf, buflen, "%pT", &tid);
599 static int log_ctime(const ap_errorlog_info *info, const char *arg,
600 char *buf, int buflen)
602 int time_len = buflen;
603 int option = AP_CTIME_OPTION_NONE;
607 case 'u': option |= AP_CTIME_OPTION_USEC;
609 case 'c': option |= AP_CTIME_OPTION_COMPACT;
615 ap_recent_ctime_ex(buf, apr_time_now(), option, &time_len);
617 /* ap_recent_ctime_ex includes the trailing \0 in time_len */
621 static int log_loglevel(const ap_errorlog_info *info, const char *arg,
622 char *buf, int buflen)
627 return cpystrn(buf, priorities[info->level].t_name, buflen);
630 static int log_log_id(const ap_errorlog_info *info, const char *arg,
631 char *buf, int buflen)
634 * C: log conn log_id if available,
635 * c: log conn log id if available and not a once-per-request log line
636 * else: log request log id if available
638 if (arg && !strcasecmp(arg, "c")) {
639 if (info->c && (*arg != 'C' || !info->r)) {
640 return cpystrn(buf, info->c->log_id, buflen);
644 return cpystrn(buf, info->r->log_id, buflen);
649 static int log_keepalives(const ap_errorlog_info *info, const char *arg,
650 char *buf, int buflen)
655 return apr_snprintf(buf, buflen, "%d", info->c->keepalives);
658 static int log_module_name(const ap_errorlog_info *info, const char *arg,
659 char *buf, int buflen)
661 return cpystrn(buf, ap_find_module_short_name(info->module_index), buflen);
664 static int log_file_line(const ap_errorlog_info *info, const char *arg,
665 char *buf, int buflen)
667 if (info->file == NULL) {
671 const char *file = info->file;
672 #if defined(_OSD_POSIX) || defined(WIN32) || defined(__MVS__)
674 char *e = strrchr(file, '/');
677 e = strrchr(file, '\\');
681 /* In OSD/POSIX, the compiler returns for __FILE__
682 * a string like: __FILE__="*POSIX(/usr/include/stdio.h)"
683 * (it even returns an absolute path for sources in
684 * the current directory). Here we try to strip this
685 * down to the basename.
687 if (e != NULL && e[1] != '\0') {
688 apr_snprintf(tmp, sizeof(tmp), "%s", &e[1]);
689 e = &tmp[strlen(tmp)-1];
695 #else /* _OSD_POSIX || WIN32 */
697 /* On Unix, __FILE__ may be an absolute path in a
699 if (file[0] == '/' && (p = ap_strrchr_c(file, '/')) != NULL) {
702 #endif /*_OSD_POSIX || WIN32 */
703 return apr_snprintf(buf, buflen, "%s(%d)", file, info->line);
707 static int log_apr_status(const ap_errorlog_info *info, const char *arg,
708 char *buf, int buflen)
710 apr_status_t status = info->status;
715 if (status < APR_OS_START_EAIERR) {
716 len = apr_snprintf(buf, buflen, "(%d)", status);
718 else if (status < APR_OS_START_SYSERR) {
719 len = apr_snprintf(buf, buflen, "(EAI %d)",
720 status - APR_OS_START_EAIERR);
722 else if (status < 100000 + APR_OS_START_SYSERR) {
723 len = apr_snprintf(buf, buflen, "(OS %d)",
724 status - APR_OS_START_SYSERR);
727 len = apr_snprintf(buf, buflen, "(os 0x%08x)",
728 status - APR_OS_START_SYSERR);
730 apr_strerror(status, buf + len, buflen - len);
731 len += strlen(buf + len);
735 static int log_server_name(const ap_errorlog_info *info, const char *arg,
736 char *buf, int buflen)
739 return cpystrn(buf, ap_get_server_name((request_rec *)info->r), buflen);
744 static int log_virtual_host(const ap_errorlog_info *info, const char *arg,
745 char *buf, int buflen)
748 return cpystrn(buf, info->s->server_hostname, buflen);
754 static int log_table_entry(const apr_table_t *table, const char *name,
755 char *buf, int buflen)
757 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
759 char scratch[MAX_STRING_LEN];
761 if ((value = apr_table_get(table, name)) != NULL) {
762 ap_escape_errorlog_item(scratch, value, MAX_STRING_LEN);
763 return cpystrn(buf, scratch, buflen);
768 return cpystrn(buf, apr_table_get(table, name), buflen);
772 static int log_header(const ap_errorlog_info *info, const char *arg,
773 char *buf, int buflen)
776 return log_table_entry(info->r->headers_in, arg, buf, buflen);
781 static int log_note(const ap_errorlog_info *info, const char *arg,
782 char *buf, int buflen)
784 /* XXX: maybe escaping the entry is not necessary for notes? */
786 return log_table_entry(info->r->notes, arg, buf, buflen);
791 static int log_env_var(const ap_errorlog_info *info, const char *arg,
792 char *buf, int buflen)
795 return log_table_entry(info->r->subprocess_env, arg, buf, buflen);
800 static int core_generate_log_id(const conn_rec *c, const request_rec *r,
801 const char **idstring)
803 apr_uint64_t id, tmp;
808 if (r && r->request_time) {
809 id = (apr_uint64_t)r->request_time;
812 id = (apr_uint64_t)apr_time_now();
816 if (sizeof(pid_t) > 2) {
832 apr_uintptr_t tmp2 = (apr_uintptr_t)c->current_thread;
839 len = apr_base64_encode_len(sizeof(id)); /* includes trailing \0 */
840 encoded = apr_palloc(r ? r->pool : c->pool, len);
841 apr_base64_encode(encoded, (char *)&id, sizeof(id));
843 /* Skip the last char, it is always '=' */
844 encoded[len - 2] = '\0';
851 static void add_log_id(const conn_rec *c, const request_rec *r)
854 /* need to cast const away */
856 id = &((request_rec *)r)->log_id;
859 id = &((conn_rec *)c)->log_id;
862 ap_run_generate_log_id(c, r, id);
865 AP_DECLARE(void) ap_register_log_hooks(apr_pool_t *p)
867 ap_hook_generate_log_id(core_generate_log_id, NULL, NULL,
868 APR_HOOK_REALLY_LAST);
870 ap_register_errorlog_handler(p, "a", log_remote_address, 0);
871 ap_register_errorlog_handler(p, "A", log_local_address, 0);
872 ap_register_errorlog_handler(p, "e", log_env_var, 0);
873 ap_register_errorlog_handler(p, "E", log_apr_status, 0);
874 ap_register_errorlog_handler(p, "F", log_file_line, 0);
875 ap_register_errorlog_handler(p, "i", log_header, 0);
876 ap_register_errorlog_handler(p, "k", log_keepalives, 0);
877 ap_register_errorlog_handler(p, "l", log_loglevel, 0);
878 ap_register_errorlog_handler(p, "L", log_log_id, 0);
879 ap_register_errorlog_handler(p, "m", log_module_name, 0);
880 ap_register_errorlog_handler(p, "n", log_note, 0);
881 ap_register_errorlog_handler(p, "P", log_pid, 0);
882 ap_register_errorlog_handler(p, "t", log_ctime, 0);
883 ap_register_errorlog_handler(p, "T", log_tid, 0);
884 ap_register_errorlog_handler(p, "v", log_virtual_host, 0);
885 ap_register_errorlog_handler(p, "V", log_server_name, 0);
889 * This is used if no error log format is defined and during startup.
890 * It automatically omits the timestamp if logging to syslog.
892 static int do_errorlog_default(const ap_errorlog_info *info, char *buf,
893 int buflen, int *errstr_start, int *errstr_end,
894 const char *errstr_fmt, va_list args)
899 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
900 char scratch[MAX_STRING_LEN];
903 if (!info->using_syslog && !info->startup) {
905 len += log_ctime(info, "u", buf + len, buflen - len);
910 if (!info->startup) {
912 len += log_module_name(info, NULL, buf + len, buflen - len);
914 len += log_loglevel(info, NULL, buf + len, buflen - len);
915 len += cpystrn(buf + len, "] [pid ", buflen - len);
917 len += log_pid(info, NULL, buf + len, buflen - len);
920 len += cpystrn(buf + len, ":tid ", buflen - len);
921 item_len = log_tid(info, NULL, buf + len, buflen - len);
931 if (info->level >= APLOG_DEBUG) {
932 item_len = log_file_line(info, NULL, buf + len, buflen - len);
935 len += cpystrn(buf + len, ": ", buflen - len);
940 item_len = log_apr_status(info, NULL, buf + len, buflen - len);
943 len += cpystrn(buf + len, ": ", buflen - len);
949 * remote_ip can be client or backend server. If we have a scoreboard
950 * handle, it is likely a client.
952 len += apr_snprintf(buf + len, buflen - len,
953 info->c->sbh ? "[client %s:%d] " : "[remote %s:%d] ",
954 info->c->remote_ip, info->c->remote_addr->port);
957 /* the actual error message */
959 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
960 if (apr_vsnprintf(scratch, MAX_STRING_LEN, errstr_fmt, args)) {
961 len += ap_escape_errorlog_item(buf + len, scratch,
966 len += apr_vsnprintf(buf + len, buflen - len, errstr_fmt, args);
971 len += cpystrn(buf + len, ", referer: ", buflen - len);
972 item_len = log_header(info, "Referer", buf + len, buflen - len);
981 static int do_errorlog_format(apr_array_header_t *fmt, ap_errorlog_info *info,
982 char *buf, int buflen, int *errstr_start,
983 int *errstr_end, const char *err_fmt, va_list args)
985 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
986 char scratch[MAX_STRING_LEN];
992 ap_errorlog_format_item *items = (ap_errorlog_format_item *)fmt->elts;
994 for (i = 0; i < fmt->nelts; ++i) {
995 ap_errorlog_format_item *item = &items[i];
996 if (item->flags & AP_ERRORLOG_FLAG_FIELD_SEP) {
1005 if (item->flags & AP_ERRORLOG_FLAG_MESSAGE) {
1006 /* the actual error message */
1007 *errstr_start = len;
1008 #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
1009 if (apr_vsnprintf(scratch, MAX_STRING_LEN, err_fmt, args)) {
1010 len += ap_escape_errorlog_item(buf + len, scratch,
1015 len += apr_vsnprintf(buf + len, buflen - len, err_fmt, args);
1019 else if (skipping) {
1022 else if ((int)item->min_loglevel > info->level) {
1027 int item_len = (*item->func)(info, item->arg, buf + len,
1030 if (item->flags & AP_ERRORLOG_FLAG_REQUIRED) {
1031 /* required item is empty. skip whole line */
1035 else if (item->flags & AP_ERRORLOG_FLAG_NULL_AS_HYPHEN) {
1051 static void write_logline(char *errstr, apr_size_t len, apr_file_t *logf,
1054 /* NULL if we are logging to syslog */
1056 /* Truncate for the terminator (as apr_snprintf does) */
1057 if (len > MAX_STRING_LEN - sizeof(APR_EOL_STR)) {
1058 len = MAX_STRING_LEN - sizeof(APR_EOL_STR);
1060 strcpy(errstr + len, APR_EOL_STR);
1061 apr_file_puts(errstr, logf);
1062 apr_file_flush(logf);
1066 syslog(level < LOG_PRIMASK ? level : APLOG_DEBUG, "%s", errstr);
1071 static void log_error_core(const char *file, int line, int module_index,
1073 apr_status_t status, const server_rec *s,
1075 const request_rec *r, apr_pool_t *pool,
1076 const char *fmt, va_list args)
1078 char errstr[MAX_STRING_LEN];
1079 apr_file_t *logf = NULL;
1080 int level_and_mask = level & APLOG_LEVELMASK;
1081 const request_rec *rmain = NULL;
1082 core_server_config *sconf = NULL;
1083 ap_errorlog_info info;
1085 /* do we need to log once-per-req or once-per-conn info? */
1086 int log_conn_info = 0, log_req_info = 0;
1087 apr_array_header_t **lines = NULL;
1089 int line_number = 0;
1091 if (r && r->connection) {
1097 * If we are doing stderr logging (startup), don't log messages that are
1098 * above the default server log level unless it is a startup/shutdown
1102 if ((level_and_mask != APLOG_NOTICE)
1103 && (level_and_mask > ap_default_loglevel)) {
1111 int configured_level = r ? ap_get_request_module_loglevel(r, module_index) :
1112 c ? ap_get_conn_server_module_loglevel(c, s, module_index) :
1113 ap_get_server_module_loglevel(s, module_index);
1116 * If we are doing normal logging, don't log messages that are
1117 * above the module's log level unless it is a startup/shutdown notice
1119 if ((level_and_mask != APLOG_NOTICE)
1120 && (level_and_mask > configured_level)) {
1124 logf = s->error_log;
1128 * If we are doing syslog logging, don't log messages that are
1129 * above the module's log level (including a startup/shutdown notice)
1131 if (level_and_mask > configured_level) {
1136 /* the faked server_rec from mod_cgid does not have s->module_config */
1137 if (s->module_config) {
1138 sconf = ap_get_core_module_config(s->module_config);
1139 if (c && !c->log_id) {
1140 add_log_id(c, NULL);
1141 if (sconf->error_log_conn && sconf->error_log_conn->nelts > 0)
1150 if (!rmain->log_id) {
1151 /* XXX: do we need separate log ids for subrequests? */
1152 if (sconf->error_log_req && sconf->error_log_req->nelts > 0)
1155 * XXX: potential optimization: only create log id if %L is
1156 * XXX: actually used
1158 add_log_id(c, rmain);
1169 info.using_syslog = (logf == NULL);
1170 info.startup = ((level & APLOG_STARTUP) == APLOG_STARTUP);
1174 apr_array_header_t *log_format;
1175 int len = 0, errstr_start = 0, errstr_end = 0;
1176 /* XXX: potential optimization: format common prefixes only once */
1177 if (log_conn_info) {
1178 /* once-per-connection info */
1179 if (line_number == 0) {
1180 lines = (apr_array_header_t **)sconf->error_log_conn->elts;
1184 info.module_index = APLOG_NO_MODULE;
1187 log_format = lines[line_number++];
1189 if (line_number == sconf->error_log_conn->nelts) {
1190 /* this is the last line of once-per-connection info */
1195 else if (log_req_info) {
1196 /* once-per-request info */
1197 if (line_number == 0) {
1198 lines = (apr_array_header_t **)sconf->error_log_req->elts;
1202 info.module_index = APLOG_NO_MODULE;
1205 log_format = lines[line_number++];
1207 if (line_number == sconf->error_log_req->nelts) {
1208 /* this is the last line of once-per-request info */
1214 /* the actual error message */
1217 info.level = level_and_mask;
1218 info.module_index = module_index;
1221 info.status = status;
1222 log_format = sconf ? sconf->error_log_format : NULL;
1227 * prepare and log one line
1231 len += do_errorlog_format(log_format, &info, errstr + len,
1232 MAX_STRING_LEN - len,
1233 &errstr_start, &errstr_end, fmt, args);
1236 len += do_errorlog_default(&info, errstr + len, MAX_STRING_LEN - len,
1237 &errstr_start, &errstr_end, fmt, args);
1243 * Don't log empty lines. This can happen with once-per-conn/req
1244 * info if an item with AP_ERRORLOG_FLAG_REQUIRED is NULL.
1248 write_logline(errstr, len, logf, level_and_mask);
1251 /* only pass the real error string to the hook */
1252 errstr[errstr_end] = '\0';
1253 ap_run_error_log(file, line, module_index, level, status, s, r, pool,
1254 errstr + errstr_start);
1261 AP_DECLARE(void) ap_log_error_(const char *file, int line, int module_index,
1262 int level, apr_status_t status,
1263 const server_rec *s, const char *fmt, ...)
1267 va_start(args, fmt);
1268 log_error_core(file, line, module_index, level, status, s, NULL, NULL,
1273 AP_DECLARE(void) ap_log_perror_(const char *file, int line, int module_index,
1274 int level, apr_status_t status, apr_pool_t *p,
1275 const char *fmt, ...)
1279 va_start(args, fmt);
1280 log_error_core(file, line, module_index, level, status, NULL, NULL, NULL,
1285 AP_DECLARE(void) ap_log_rerror_(const char *file, int line, int module_index,
1286 int level, apr_status_t status,
1287 const request_rec *r, const char *fmt, ...)
1291 va_start(args, fmt);
1292 log_error_core(file, line, module_index, level, status, r->server, NULL, r,
1296 * IF APLOG_TOCLIENT is set,
1297 * AND the error level is 'warning' or more severe,
1298 * AND there isn't already error text associated with this request,
1299 * THEN make the message text available to ErrorDocument and
1300 * other error processors.
1304 if ((level & APLOG_TOCLIENT)
1305 && ((level & APLOG_LEVELMASK) <= APLOG_WARNING)
1306 && (apr_table_get(r->notes, "error-notes") == NULL)) {
1307 apr_table_setn(r->notes, "error-notes",
1308 ap_escape_html(r->pool, apr_pvsprintf(r->pool, fmt,
1314 AP_DECLARE(void) ap_log_cserror_(const char *file, int line, int module_index,
1315 int level, apr_status_t status,
1316 const conn_rec *c, const server_rec *s,
1317 const char *fmt, ...)
1321 va_start(args, fmt);
1322 log_error_core(file, line, module_index, level, status, s, c,
1323 NULL, NULL, fmt, args);
1327 AP_DECLARE(void) ap_log_cerror_(const char *file, int line, int module_index,
1328 int level, apr_status_t status,
1329 const conn_rec *c, const char *fmt, ...)
1333 va_start(args, fmt);
1334 log_error_core(file, line, module_index, level, status, c->base_server, c,
1335 NULL, NULL, fmt, args);
1339 AP_DECLARE(void) ap_log_command_line(apr_pool_t *plog, server_rec *s)
1342 process_rec *process = s->process;
1346 /* Piece together the command line from the pieces
1347 * in process->argv, with spaces in between.
1349 for (i = 0; i < process->argc; i++) {
1350 len_needed += strlen(process->argv[i]) + 1;
1353 result = (char *) apr_palloc(plog, len_needed);
1356 for (i = 0; i < process->argc; i++) {
1357 strcat(result, process->argv[i]);
1358 if ((i+1)< process->argc) {
1359 strcat(result, " ");
1362 ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, s,
1363 "Command line: '%s'", result);
1366 AP_DECLARE(void) ap_remove_pid(apr_pool_t *p, const char *rel_fname)
1369 const char *fname = ap_server_root_relative(p, rel_fname);
1371 if (fname != NULL) {
1372 rv = apr_file_remove(fname, p);
1373 if (rv != APR_SUCCESS) {
1374 ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf,
1375 "failed to remove PID file %s", fname);
1378 ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf,
1379 "removed PID file %s (pid=%" APR_PID_T_FMT ")",
1385 AP_DECLARE(void) ap_log_pid(apr_pool_t *p, const char *filename)
1387 apr_file_t *pid_file = NULL;
1389 static pid_t saved_pid = -1;
1398 fname = ap_server_root_relative(p, filename);
1400 ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT, APR_EBADPATH,
1401 NULL, "Invalid PID file path %s, ignoring.", filename);
1406 if (mypid != saved_pid
1407 && apr_stat(&finfo, fname, APR_FINFO_MTIME, p) == APR_SUCCESS) {
1408 /* AP_SIG_GRACEFUL and HUP call this on each restart.
1409 * Only warn on first time through for this pid.
1411 * XXX: Could just write first time through too, although
1412 * that may screw up scripts written to do something
1413 * based on the last modification time of the pid file.
1415 ap_log_perror(APLOG_MARK, APLOG_WARNING, 0, p,
1416 "pid file %s overwritten -- Unclean "
1417 "shutdown of previous Apache run?",
1421 if ((rv = apr_file_open(&pid_file, fname,
1422 APR_WRITE | APR_CREATE | APR_TRUNCATE,
1423 APR_UREAD | APR_UWRITE | APR_GREAD | APR_WREAD, p))
1425 ap_log_error(APLOG_MARK, APLOG_ERR, rv, NULL,
1426 "could not create %s", fname);
1427 ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL,
1428 "%s: could not log pid to file %s",
1429 ap_server_argv0, fname);
1432 apr_file_printf(pid_file, "%" APR_PID_T_FMT APR_EOL_STR, mypid);
1433 apr_file_close(pid_file);
1437 AP_DECLARE(apr_status_t) ap_read_pid(apr_pool_t *p, const char *filename,
1440 const apr_size_t BUFFER_SIZE = sizeof(long) * 3 + 2; /* see apr_ltoa */
1441 apr_file_t *pid_file = NULL;
1445 apr_size_t bytes_read;
1448 return APR_EGENERAL;
1451 fname = ap_server_root_relative(p, filename);
1453 ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT, APR_EBADPATH,
1454 NULL, "Invalid PID file path %s, ignoring.", filename);
1455 return APR_EGENERAL;
1458 rv = apr_file_open(&pid_file, fname, APR_READ, APR_OS_DEFAULT, p);
1459 if (rv != APR_SUCCESS) {
1463 buf = apr_palloc(p, BUFFER_SIZE);
1465 rv = apr_file_read_full(pid_file, buf, BUFFER_SIZE - 1, &bytes_read);
1466 if (rv != APR_SUCCESS && rv != APR_EOF) {
1470 /* If we fill the buffer, we're probably reading a corrupt pid file.
1471 * To be nice, let's also ensure the first char is a digit. */
1472 if (bytes_read == 0 || bytes_read == BUFFER_SIZE - 1 || !apr_isdigit(*buf)) {
1473 return APR_EGENERAL;
1476 buf[bytes_read] = '\0';
1477 *mypid = strtol(buf, &endptr, 10);
1479 apr_file_close(pid_file);
1483 AP_DECLARE(void) ap_log_assert(const char *szExp, const char *szFile,
1486 char time_str[APR_CTIME_LEN];
1488 apr_ctime(time_str, apr_time_now());
1489 ap_log_error(APLOG_MARK, APLOG_CRIT, 0, NULL,
1490 "[%s] file %s, line %d, assertion \"%s\" failed",
1491 time_str, szFile, nLine, szExp);
1495 /* unix assert does an abort leading to a core dump */
1500 /* piped log support */
1502 #ifdef AP_HAVE_RELIABLE_PIPED_LOGS
1503 /* forward declaration */
1504 static void piped_log_maintenance(int reason, void *data, apr_wait_t status);
1506 /* Spawn the piped logger process pl->program. */
1507 static apr_status_t piped_log_spawn(piped_log *pl)
1509 apr_procattr_t *procattr;
1510 apr_proc_t *procnew = NULL;
1511 apr_status_t status;
1513 if (((status = apr_procattr_create(&procattr, pl->p)) != APR_SUCCESS) ||
1514 ((status = apr_procattr_dir_set(procattr, ap_server_root))
1516 ((status = apr_procattr_cmdtype_set(procattr, pl->cmdtype))
1518 ((status = apr_procattr_child_in_set(procattr,
1522 ((status = apr_procattr_child_errfn_set(procattr, log_child_errfn))
1524 ((status = apr_procattr_error_check_set(procattr, 1)) != APR_SUCCESS)) {
1526 /* Something bad happened, give up and go away. */
1527 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
1528 "piped_log_spawn: unable to setup child process '%s': %s",
1529 pl->program, apr_strerror(status, buf, sizeof(buf)));
1535 apr_tokenize_to_argv(pl->program, &args, pl->p);
1536 pname = apr_pstrdup(pl->p, args[0]);
1537 procnew = apr_pcalloc(pl->p, sizeof(apr_proc_t));
1538 status = apr_proc_create(procnew, pname, (const char * const *) args,
1539 NULL, procattr, pl->p);
1541 if (status == APR_SUCCESS) {
1543 /* procnew->in was dup2'd from pl->write_fd;
1544 * since the original fd is still valid, close the copy to
1546 apr_file_close(procnew->in);
1548 apr_proc_other_child_register(procnew, piped_log_maintenance, pl,
1549 pl->write_fd, pl->p);
1550 close_handle_in_child(pl->p, pl->read_fd);
1554 /* Something bad happened, give up and go away. */
1555 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
1556 "unable to start piped log program '%s': %s",
1557 pl->program, apr_strerror(status, buf, sizeof(buf)));
1565 static void piped_log_maintenance(int reason, void *data, apr_wait_t status)
1567 piped_log *pl = data;
1572 case APR_OC_REASON_DEATH:
1573 case APR_OC_REASON_LOST:
1574 pl->pid = NULL; /* in case we don't get it going again, this
1575 * tells other logic not to try to kill it
1577 apr_proc_other_child_unregister(pl);
1578 stats = ap_mpm_query(AP_MPMQ_MPM_STATE, &mpm_state);
1579 if (stats != APR_SUCCESS) {
1580 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
1581 "can't query MPM state; not restarting "
1582 "piped log program '%s'",
1585 else if (mpm_state != AP_MPMQ_STOPPING) {
1586 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
1587 "piped log program '%s' failed unexpectedly",
1589 if ((stats = piped_log_spawn(pl)) != APR_SUCCESS) {
1590 /* what can we do? This could be the error log we're having
1591 * problems opening up... */
1593 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
1594 "piped_log_maintenance: unable to respawn '%s': %s",
1595 pl->program, apr_strerror(stats, buf, sizeof(buf)));
1600 case APR_OC_REASON_UNWRITABLE:
1601 /* We should not kill off the pipe here, since it may only be full.
1602 * If it really is locked, we should kill it off manually. */
1605 case APR_OC_REASON_RESTART:
1606 if (pl->pid != NULL) {
1607 apr_proc_kill(pl->pid, SIGTERM);
1612 case APR_OC_REASON_UNREGISTER:
1618 static apr_status_t piped_log_cleanup_for_exec(void *data)
1620 piped_log *pl = data;
1622 apr_file_close(pl->read_fd);
1623 apr_file_close(pl->write_fd);
1628 static apr_status_t piped_log_cleanup(void *data)
1630 piped_log *pl = data;
1632 if (pl->pid != NULL) {
1633 apr_proc_kill(pl->pid, SIGTERM);
1635 return piped_log_cleanup_for_exec(data);
1639 AP_DECLARE(piped_log *) ap_open_piped_log_ex(apr_pool_t *p,
1640 const char *program,
1641 apr_cmdtype_e cmdtype)
1645 pl = apr_palloc(p, sizeof (*pl));
1647 pl->program = apr_pstrdup(p, program);
1649 pl->cmdtype = cmdtype;
1650 if (apr_file_pipe_create_ex(&pl->read_fd,
1652 APR_FULL_BLOCK, p) != APR_SUCCESS) {
1655 apr_pool_cleanup_register(p, pl, piped_log_cleanup,
1656 piped_log_cleanup_for_exec);
1657 if (piped_log_spawn(pl) != APR_SUCCESS) {
1658 apr_pool_cleanup_kill(p, pl, piped_log_cleanup);
1659 apr_file_close(pl->read_fd);
1660 apr_file_close(pl->write_fd);
1666 #else /* !AP_HAVE_RELIABLE_PIPED_LOGS */
1668 static apr_status_t piped_log_cleanup(void *data)
1670 piped_log *pl = data;
1672 apr_file_close(pl->write_fd);
1676 AP_DECLARE(piped_log *) ap_open_piped_log_ex(apr_pool_t *p,
1677 const char *program,
1678 apr_cmdtype_e cmdtype)
1681 apr_file_t *dummy = NULL;
1684 rc = log_child(p, program, &dummy, cmdtype, 0);
1685 if (rc != APR_SUCCESS) {
1686 ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL,
1687 "Couldn't start piped log process '%s'.",
1688 (program == NULL) ? "NULL" : program);
1692 pl = apr_palloc(p, sizeof (*pl));
1695 pl->write_fd = dummy;
1696 apr_pool_cleanup_register(p, pl, piped_log_cleanup, piped_log_cleanup);
1703 AP_DECLARE(piped_log *) ap_open_piped_log(apr_pool_t *p,
1704 const char *program)
1706 apr_cmdtype_e cmdtype = APR_PROGRAM_ENV;
1708 /* In 2.4 favor PROGRAM_ENV, accept "||prog" syntax for compatibility
1709 * and "|$cmd" to override the default.
1710 * Any 2.2 backport would continue to favor SHELLCMD_ENV so there
1711 * accept "||prog" to override, and "|$cmd" to ease conversion.
1713 if (*program == '|')
1715 if (*program == '$') {
1716 cmdtype = APR_SHELLCMD_ENV;
1720 return ap_open_piped_log_ex(p, program, cmdtype);
1723 AP_DECLARE(void) ap_close_piped_log(piped_log *pl)
1725 apr_pool_cleanup_run(pl->p, pl, piped_log_cleanup);
1728 AP_DECLARE(const char *) ap_parse_log_level(const char *str, int *val)
1730 char *err = "Log level keyword must be one of emerg/alert/crit/error/warn/"
1731 "notice/info/debug/trace1/.../trace8";
1737 while (priorities[i].t_name != NULL) {
1738 if (!strcasecmp(str, priorities[i].t_name)) {
1739 *val = priorities[i].t_val;
1747 AP_IMPLEMENT_HOOK_VOID(error_log,
1748 (const char *file, int line, int module_index, int level,
1749 apr_status_t status, const server_rec *s,
1750 const request_rec *r, apr_pool_t *pool,
1751 const char *errstr), (file, line, module_index, level,
1752 status, s, r, pool, errstr))
1754 AP_IMPLEMENT_HOOK_RUN_FIRST(int, generate_log_id,
1755 (const conn_rec *c, const request_rec *r,
1757 (c, r, id), DECLINED)