2 * Author: Tatu Ylonen <ylo@cs.hut.fi>
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
6 * As far as I am concerned, the code I have written for this software
7 * can be used freely for any purpose. Any derived versions of this
8 * software must be clearly marked as such, and if the derived work is
9 * incompatible with the protocol description in the RFC file, it must be
10 * called by a name other than "ssh" or "Secure Shell".
13 * Copyright (c) 2000 Markus Friedl. All rights reserved.
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 RCSID("$OpenBSD: log.c,v 1.28 2003/05/24 09:02:22 djm Exp $");
45 static LogLevel log_level = SYSLOG_LEVEL_INFO;
46 static int log_on_stderr = 1;
47 static int log_facility = LOG_AUTH;
50 extern char *__progname;
52 /* textual representation of log-facilities/levels */
57 } log_facilities[] = {
58 { "DAEMON", SYSLOG_FACILITY_DAEMON },
59 { "USER", SYSLOG_FACILITY_USER },
60 { "AUTH", SYSLOG_FACILITY_AUTH },
62 { "AUTHPRIV", SYSLOG_FACILITY_AUTHPRIV },
64 { "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
65 { "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
66 { "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
67 { "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
68 { "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
69 { "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
70 { "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
71 { "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
72 { NULL, SYSLOG_FACILITY_NOT_SET }
80 { "QUIET", SYSLOG_LEVEL_QUIET },
81 { "FATAL", SYSLOG_LEVEL_FATAL },
82 { "ERROR", SYSLOG_LEVEL_ERROR },
83 { "INFO", SYSLOG_LEVEL_INFO },
84 { "VERBOSE", SYSLOG_LEVEL_VERBOSE },
85 { "DEBUG", SYSLOG_LEVEL_DEBUG1 },
86 { "DEBUG1", SYSLOG_LEVEL_DEBUG1 },
87 { "DEBUG2", SYSLOG_LEVEL_DEBUG2 },
88 { "DEBUG3", SYSLOG_LEVEL_DEBUG3 },
89 { NULL, SYSLOG_LEVEL_NOT_SET }
93 log_facility_number(char *name)
98 for (i = 0; log_facilities[i].name; i++)
99 if (strcasecmp(log_facilities[i].name, name) == 0)
100 return log_facilities[i].val;
101 return SYSLOG_FACILITY_NOT_SET;
105 log_level_number(char *name)
110 for (i = 0; log_levels[i].name; i++)
111 if (strcasecmp(log_levels[i].name, name) == 0)
112 return log_levels[i].val;
113 return SYSLOG_LEVEL_NOT_SET;
116 /* Error messages that should be logged. */
119 error(const char *fmt,...)
124 do_log(SYSLOG_LEVEL_ERROR, fmt, args);
128 /* Log this message (information that usually should go to the log). */
131 logit(const char *fmt,...)
136 do_log(SYSLOG_LEVEL_INFO, fmt, args);
140 /* More detailed messages (information that does not need to go to the log). */
143 verbose(const char *fmt,...)
148 do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
152 /* Debugging messages that should not be logged during normal operation. */
155 debug(const char *fmt,...)
160 do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
165 debug2(const char *fmt,...)
170 do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
175 debug3(const char *fmt,...)
180 do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
186 struct fatal_cleanup {
187 struct fatal_cleanup *next;
188 void (*proc) (void *);
192 static struct fatal_cleanup *fatal_cleanups = NULL;
194 /* Registers a cleanup function to be called by fatal() before exiting. */
197 fatal_add_cleanup(void (*proc) (void *), void *context)
199 struct fatal_cleanup *cu;
201 cu = xmalloc(sizeof(*cu));
203 cu->context = context;
204 cu->next = fatal_cleanups;
208 /* Removes a cleanup frunction to be called at fatal(). */
211 fatal_remove_cleanup(void (*proc) (void *context), void *context)
213 struct fatal_cleanup **cup, *cu;
215 for (cup = &fatal_cleanups; *cup; cup = &cu->next) {
217 if (cu->proc == proc && cu->context == context) {
223 fatal("fatal_remove_cleanup: no such cleanup function: 0x%lx 0x%lx",
224 (u_long) proc, (u_long) context);
227 /* Remove all cleanups, to be called after fork() */
229 fatal_remove_all_cleanups(void)
231 struct fatal_cleanup *cu, *next_cu;
233 for (cu = fatal_cleanups; cu; cu = next_cu) {
237 fatal_cleanups = NULL;
240 /* Cleanup and exit */
244 struct fatal_cleanup *cu, *next_cu;
245 static int called = 0;
250 /* Call cleanup functions. */
251 for (cu = fatal_cleanups; cu; cu = next_cu) {
253 debug("Calling cleanup 0x%lx(0x%lx)",
254 (u_long) cu->proc, (u_long) cu->context);
255 (*cu->proc) (cu->context);
262 * Initialize the log.
266 log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
271 case SYSLOG_LEVEL_QUIET:
272 case SYSLOG_LEVEL_FATAL:
273 case SYSLOG_LEVEL_ERROR:
274 case SYSLOG_LEVEL_INFO:
275 case SYSLOG_LEVEL_VERBOSE:
276 case SYSLOG_LEVEL_DEBUG1:
277 case SYSLOG_LEVEL_DEBUG2:
278 case SYSLOG_LEVEL_DEBUG3:
282 fprintf(stderr, "Unrecognized internal syslog level code %d\n",
287 log_on_stderr = on_stderr;
292 case SYSLOG_FACILITY_DAEMON:
293 log_facility = LOG_DAEMON;
295 case SYSLOG_FACILITY_USER:
296 log_facility = LOG_USER;
298 case SYSLOG_FACILITY_AUTH:
299 log_facility = LOG_AUTH;
302 case SYSLOG_FACILITY_AUTHPRIV:
303 log_facility = LOG_AUTHPRIV;
306 case SYSLOG_FACILITY_LOCAL0:
307 log_facility = LOG_LOCAL0;
309 case SYSLOG_FACILITY_LOCAL1:
310 log_facility = LOG_LOCAL1;
312 case SYSLOG_FACILITY_LOCAL2:
313 log_facility = LOG_LOCAL2;
315 case SYSLOG_FACILITY_LOCAL3:
316 log_facility = LOG_LOCAL3;
318 case SYSLOG_FACILITY_LOCAL4:
319 log_facility = LOG_LOCAL4;
321 case SYSLOG_FACILITY_LOCAL5:
322 log_facility = LOG_LOCAL5;
324 case SYSLOG_FACILITY_LOCAL6:
325 log_facility = LOG_LOCAL6;
327 case SYSLOG_FACILITY_LOCAL7:
328 log_facility = LOG_LOCAL7;
332 "Unrecognized internal syslog facility code %d\n",
338 #define MSGBUFSIZ 1024
341 do_log(LogLevel level, const char *fmt, va_list args)
344 struct syslog_data sdata = SYSLOG_DATA_INIT;
346 char msgbuf[MSGBUFSIZ];
347 char fmtbuf[MSGBUFSIZ];
351 if (level > log_level)
355 case SYSLOG_LEVEL_FATAL:
360 case SYSLOG_LEVEL_ERROR:
365 case SYSLOG_LEVEL_INFO:
368 case SYSLOG_LEVEL_VERBOSE:
371 case SYSLOG_LEVEL_DEBUG1:
375 case SYSLOG_LEVEL_DEBUG2:
379 case SYSLOG_LEVEL_DEBUG3:
384 txt = "internal error";
389 snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
390 vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
392 vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
394 strnvis(fmtbuf, msgbuf, sizeof(fmtbuf), VIS_SAFE|VIS_OCTAL);
396 snprintf(msgbuf, sizeof msgbuf, "%s\r\n", fmtbuf);
397 write(STDERR_FILENO, msgbuf, strlen(msgbuf));
400 openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
401 syslog_r(pri, &sdata, "%.500s", fmtbuf);
404 openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
405 syslog(pri, "%.500s", fmtbuf);