1 /* $OpenBSD: log.c,v 1.41 2008/06/10 04:50:25 dtucker Exp $ */
3 * Author: Tatu Ylonen <ylo@cs.hut.fi>
4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
7 * As far as I am concerned, the code I have written for this software
8 * can be used freely for any purpose. Any derived versions of this
9 * software must be clearly marked as such, and if the derived work is
10 * incompatible with the protocol description in the RFC file, it must be
11 * called by a name other than "ssh" or "Secure Shell".
14 * Copyright (c) 2000 Markus Friedl. All rights reserved.
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <sys/types.h>
48 #if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H)
55 static LogLevel log_level = SYSLOG_LEVEL_INFO;
56 static int log_on_stderr = 1;
57 static int log_facility = LOG_AUTH;
60 extern char *__progname;
62 #define LOG_SYSLOG_VIS (VIS_CSTYLE|VIS_NL|VIS_TAB|VIS_OCTAL)
63 #define LOG_STDERR_VIS (VIS_SAFE|VIS_OCTAL)
65 /* textual representation of log-facilities/levels */
70 } log_facilities[] = {
71 { "DAEMON", SYSLOG_FACILITY_DAEMON },
72 { "USER", SYSLOG_FACILITY_USER },
73 { "AUTH", SYSLOG_FACILITY_AUTH },
75 { "AUTHPRIV", SYSLOG_FACILITY_AUTHPRIV },
77 { "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
78 { "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
79 { "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
80 { "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
81 { "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
82 { "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
83 { "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
84 { "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
85 { NULL, SYSLOG_FACILITY_NOT_SET }
93 { "SILENT", SYSLOG_LEVEL_QUIET }, /* compatibility */
94 { "QUIET", SYSLOG_LEVEL_QUIET },
95 { "FATAL", SYSLOG_LEVEL_FATAL },
96 { "ERROR", SYSLOG_LEVEL_ERROR },
97 { "INFO", SYSLOG_LEVEL_INFO },
98 { "VERBOSE", SYSLOG_LEVEL_VERBOSE },
99 { "DEBUG", SYSLOG_LEVEL_DEBUG1 },
100 { "DEBUG1", SYSLOG_LEVEL_DEBUG1 },
101 { "DEBUG2", SYSLOG_LEVEL_DEBUG2 },
102 { "DEBUG3", SYSLOG_LEVEL_DEBUG3 },
103 { NULL, SYSLOG_LEVEL_NOT_SET }
107 log_facility_number(char *name)
112 for (i = 0; log_facilities[i].name; i++)
113 if (strcasecmp(log_facilities[i].name, name) == 0)
114 return log_facilities[i].val;
115 return SYSLOG_FACILITY_NOT_SET;
119 log_facility_name(SyslogFacility facility)
123 for (i = 0; log_facilities[i].name; i++)
124 if (log_facilities[i].val == facility)
125 return log_facilities[i].name;
130 log_level_number(char *name)
135 for (i = 0; log_levels[i].name; i++)
136 if (strcasecmp(log_levels[i].name, name) == 0)
137 return log_levels[i].val;
138 return SYSLOG_LEVEL_NOT_SET;
142 log_level_name(LogLevel level)
146 for (i = 0; log_levels[i].name != NULL; i++)
147 if (log_levels[i].val == level)
148 return log_levels[i].name;
152 /* Error messages that should be logged. */
155 error(const char *fmt,...)
160 do_log(SYSLOG_LEVEL_ERROR, fmt, args);
165 sigdie(const char *fmt,...)
167 #ifdef DO_LOG_SAFE_IN_SIGHAND
171 do_log(SYSLOG_LEVEL_FATAL, fmt, args);
178 /* Log this message (information that usually should go to the log). */
181 logit(const char *fmt,...)
186 do_log(SYSLOG_LEVEL_INFO, fmt, args);
190 /* More detailed messages (information that does not need to go to the log). */
193 verbose(const char *fmt,...)
198 do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
202 /* Debugging messages that should not be logged during normal operation. */
205 debug(const char *fmt,...)
210 do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
215 debug2(const char *fmt,...)
220 do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
225 debug3(const char *fmt,...)
230 do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
235 * Initialize the log.
239 log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
241 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
242 struct syslog_data sdata = SYSLOG_DATA_INIT;
248 case SYSLOG_LEVEL_QUIET:
249 case SYSLOG_LEVEL_FATAL:
250 case SYSLOG_LEVEL_ERROR:
251 case SYSLOG_LEVEL_INFO:
252 case SYSLOG_LEVEL_VERBOSE:
253 case SYSLOG_LEVEL_DEBUG1:
254 case SYSLOG_LEVEL_DEBUG2:
255 case SYSLOG_LEVEL_DEBUG3:
259 fprintf(stderr, "Unrecognized internal syslog level code %d\n",
264 log_on_stderr = on_stderr;
269 case SYSLOG_FACILITY_DAEMON:
270 log_facility = LOG_DAEMON;
272 case SYSLOG_FACILITY_USER:
273 log_facility = LOG_USER;
275 case SYSLOG_FACILITY_AUTH:
276 log_facility = LOG_AUTH;
279 case SYSLOG_FACILITY_AUTHPRIV:
280 log_facility = LOG_AUTHPRIV;
283 case SYSLOG_FACILITY_LOCAL0:
284 log_facility = LOG_LOCAL0;
286 case SYSLOG_FACILITY_LOCAL1:
287 log_facility = LOG_LOCAL1;
289 case SYSLOG_FACILITY_LOCAL2:
290 log_facility = LOG_LOCAL2;
292 case SYSLOG_FACILITY_LOCAL3:
293 log_facility = LOG_LOCAL3;
295 case SYSLOG_FACILITY_LOCAL4:
296 log_facility = LOG_LOCAL4;
298 case SYSLOG_FACILITY_LOCAL5:
299 log_facility = LOG_LOCAL5;
301 case SYSLOG_FACILITY_LOCAL6:
302 log_facility = LOG_LOCAL6;
304 case SYSLOG_FACILITY_LOCAL7:
305 log_facility = LOG_LOCAL7;
309 "Unrecognized internal syslog facility code %d\n",
315 * If an external library (eg libwrap) attempts to use syslog
316 * immediately after reexec, syslog may be pointing to the wrong
317 * facility, so we force an open/close of syslog here.
319 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
320 openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
323 openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
328 #define MSGBUFSIZ 1024
331 do_log(LogLevel level, const char *fmt, va_list args)
333 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
334 struct syslog_data sdata = SYSLOG_DATA_INIT;
336 char msgbuf[MSGBUFSIZ];
337 char fmtbuf[MSGBUFSIZ];
340 int saved_errno = errno;
342 if (level > log_level)
346 case SYSLOG_LEVEL_FATAL:
351 case SYSLOG_LEVEL_ERROR:
356 case SYSLOG_LEVEL_INFO:
359 case SYSLOG_LEVEL_VERBOSE:
362 case SYSLOG_LEVEL_DEBUG1:
366 case SYSLOG_LEVEL_DEBUG2:
370 case SYSLOG_LEVEL_DEBUG3:
375 txt = "internal error";
380 snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
381 vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
383 vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
385 strnvis(fmtbuf, msgbuf, sizeof(fmtbuf),
386 log_on_stderr ? LOG_STDERR_VIS : LOG_SYSLOG_VIS);
388 snprintf(msgbuf, sizeof msgbuf, "%s\r\n", fmtbuf);
389 write(STDERR_FILENO, msgbuf, strlen(msgbuf));
391 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
392 openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
393 syslog_r(pri, &sdata, "%.500s", fmtbuf);
396 openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
397 syslog(pri, "%.500s", fmtbuf);