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 1.17 2001/03/04 17:42:28 millert Exp $");
44 static LogLevel log_level = SYSLOG_LEVEL_INFO;
45 static int log_on_stderr = 1;
46 static int log_facility = LOG_AUTH;
49 extern char *__progname;
51 /* textual representation of log-facilities/levels */
56 } log_facilities[] = {
57 { "DAEMON", SYSLOG_FACILITY_DAEMON },
58 { "USER", SYSLOG_FACILITY_USER },
59 { "AUTH", SYSLOG_FACILITY_AUTH },
60 { "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
61 { "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
62 { "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
63 { "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
64 { "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
65 { "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
66 { "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
67 { "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
76 { "QUIET", SYSLOG_LEVEL_QUIET },
77 { "FATAL", SYSLOG_LEVEL_FATAL },
78 { "ERROR", SYSLOG_LEVEL_ERROR },
79 { "INFO", SYSLOG_LEVEL_INFO },
80 { "VERBOSE", SYSLOG_LEVEL_VERBOSE },
81 { "DEBUG", SYSLOG_LEVEL_DEBUG1 },
82 { "DEBUG1", SYSLOG_LEVEL_DEBUG1 },
83 { "DEBUG2", SYSLOG_LEVEL_DEBUG2 },
84 { "DEBUG3", SYSLOG_LEVEL_DEBUG3 },
89 log_facility_number(char *name)
93 for (i = 0; log_facilities[i].name; i++)
94 if (strcasecmp(log_facilities[i].name, name) == 0)
95 return log_facilities[i].val;
96 return (SyslogFacility) - 1;
100 log_level_number(char *name)
104 for (i = 0; log_levels[i].name; i++)
105 if (strcasecmp(log_levels[i].name, name) == 0)
106 return log_levels[i].val;
107 return (LogLevel) - 1;
109 /* Fatal messages. This function never returns. */
112 fatal(const char *fmt,...)
116 do_log(SYSLOG_LEVEL_FATAL, fmt, args);
121 /* Error messages that should be logged. */
124 error(const char *fmt,...)
128 do_log(SYSLOG_LEVEL_ERROR, fmt, args);
132 /* Log this message (information that usually should go to the log). */
135 log(const char *fmt,...)
139 do_log(SYSLOG_LEVEL_INFO, fmt, args);
143 /* More detailed messages (information that does not need to go to the log). */
146 verbose(const char *fmt,...)
150 do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
154 /* Debugging messages that should not be logged during normal operation. */
157 debug(const char *fmt,...)
161 do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
166 debug2(const char *fmt,...)
170 do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
175 debug3(const char *fmt,...)
179 do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
185 struct fatal_cleanup {
186 struct fatal_cleanup *next;
187 void (*proc) (void *);
191 static struct fatal_cleanup *fatal_cleanups = NULL;
193 /* Registers a cleanup function to be called by fatal() before exiting. */
196 fatal_add_cleanup(void (*proc) (void *), void *context)
198 struct fatal_cleanup *cu;
200 cu = xmalloc(sizeof(*cu));
202 cu->context = context;
203 cu->next = fatal_cleanups;
207 /* Removes a cleanup frunction to be called at fatal(). */
210 fatal_remove_cleanup(void (*proc) (void *context), void *context)
212 struct fatal_cleanup **cup, *cu;
214 for (cup = &fatal_cleanups; *cup; cup = &cu->next) {
216 if (cu->proc == proc && cu->context == context) {
222 fatal("fatal_remove_cleanup: no such cleanup function: 0x%lx 0x%lx",
223 (u_long) proc, (u_long) context);
226 /* Cleanup and exit */
230 struct fatal_cleanup *cu, *next_cu;
231 static int called = 0;
236 /* Call cleanup functions. */
237 for (cu = fatal_cleanups; cu; cu = next_cu) {
239 debug("Calling cleanup 0x%lx(0x%lx)",
240 (u_long) cu->proc, (u_long) cu->context);
241 (*cu->proc) (cu->context);
248 * Initialize the log.
252 log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
257 case SYSLOG_LEVEL_QUIET:
258 case SYSLOG_LEVEL_FATAL:
259 case SYSLOG_LEVEL_ERROR:
260 case SYSLOG_LEVEL_INFO:
261 case SYSLOG_LEVEL_VERBOSE:
262 case SYSLOG_LEVEL_DEBUG1:
263 case SYSLOG_LEVEL_DEBUG2:
264 case SYSLOG_LEVEL_DEBUG3:
268 fprintf(stderr, "Unrecognized internal syslog level code %d\n",
273 log_on_stderr = on_stderr;
278 case SYSLOG_FACILITY_DAEMON:
279 log_facility = LOG_DAEMON;
281 case SYSLOG_FACILITY_USER:
282 log_facility = LOG_USER;
284 case SYSLOG_FACILITY_AUTH:
285 log_facility = LOG_AUTH;
287 case SYSLOG_FACILITY_LOCAL0:
288 log_facility = LOG_LOCAL0;
290 case SYSLOG_FACILITY_LOCAL1:
291 log_facility = LOG_LOCAL1;
293 case SYSLOG_FACILITY_LOCAL2:
294 log_facility = LOG_LOCAL2;
296 case SYSLOG_FACILITY_LOCAL3:
297 log_facility = LOG_LOCAL3;
299 case SYSLOG_FACILITY_LOCAL4:
300 log_facility = LOG_LOCAL4;
302 case SYSLOG_FACILITY_LOCAL5:
303 log_facility = LOG_LOCAL5;
305 case SYSLOG_FACILITY_LOCAL6:
306 log_facility = LOG_LOCAL6;
308 case SYSLOG_FACILITY_LOCAL7:
309 log_facility = LOG_LOCAL7;
313 "Unrecognized internal syslog facility code %d\n",
319 #define MSGBUFSIZ 1024
322 do_log(LogLevel level, const char *fmt, va_list args)
324 char msgbuf[MSGBUFSIZ];
325 char fmtbuf[MSGBUFSIZ];
329 if (level > log_level)
333 case SYSLOG_LEVEL_FATAL:
338 case SYSLOG_LEVEL_ERROR:
343 case SYSLOG_LEVEL_INFO:
346 case SYSLOG_LEVEL_VERBOSE:
349 case SYSLOG_LEVEL_DEBUG1:
353 case SYSLOG_LEVEL_DEBUG2:
357 case SYSLOG_LEVEL_DEBUG3:
362 txt = "internal error";
367 snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
368 vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
370 vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
373 fprintf(stderr, "%s\r\n", msgbuf);
375 openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
376 syslog(pri, "%.500s", msgbuf);