1 /* $OpenBSD: log.c,v 1.34 2006/07/17 01:31:09 stevesk 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.
42 #if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H)
49 static LogLevel log_level = SYSLOG_LEVEL_INFO;
50 static int log_on_stderr = 1;
51 static int log_facility = LOG_AUTH;
54 extern char *__progname;
56 #define LOG_SYSLOG_VIS (VIS_CSTYLE|VIS_NL|VIS_TAB|VIS_OCTAL)
57 #define LOG_STDERR_VIS (VIS_SAFE|VIS_OCTAL)
59 /* textual representation of log-facilities/levels */
64 } log_facilities[] = {
65 { "DAEMON", SYSLOG_FACILITY_DAEMON },
66 { "USER", SYSLOG_FACILITY_USER },
67 { "AUTH", SYSLOG_FACILITY_AUTH },
69 { "AUTHPRIV", SYSLOG_FACILITY_AUTHPRIV },
71 { "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
72 { "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
73 { "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
74 { "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
75 { "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
76 { "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
77 { "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
78 { "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
79 { NULL, SYSLOG_FACILITY_NOT_SET }
87 { "QUIET", SYSLOG_LEVEL_QUIET },
88 { "FATAL", SYSLOG_LEVEL_FATAL },
89 { "ERROR", SYSLOG_LEVEL_ERROR },
90 { "INFO", SYSLOG_LEVEL_INFO },
91 { "VERBOSE", SYSLOG_LEVEL_VERBOSE },
92 { "DEBUG", SYSLOG_LEVEL_DEBUG1 },
93 { "DEBUG1", SYSLOG_LEVEL_DEBUG1 },
94 { "DEBUG2", SYSLOG_LEVEL_DEBUG2 },
95 { "DEBUG3", SYSLOG_LEVEL_DEBUG3 },
96 { NULL, SYSLOG_LEVEL_NOT_SET }
100 log_facility_number(char *name)
105 for (i = 0; log_facilities[i].name; i++)
106 if (strcasecmp(log_facilities[i].name, name) == 0)
107 return log_facilities[i].val;
108 return SYSLOG_FACILITY_NOT_SET;
112 log_level_number(char *name)
117 for (i = 0; log_levels[i].name; i++)
118 if (strcasecmp(log_levels[i].name, name) == 0)
119 return log_levels[i].val;
120 return SYSLOG_LEVEL_NOT_SET;
123 /* Error messages that should be logged. */
126 error(const char *fmt,...)
131 do_log(SYSLOG_LEVEL_ERROR, fmt, args);
135 /* Log this message (information that usually should go to the log). */
138 logit(const char *fmt,...)
143 do_log(SYSLOG_LEVEL_INFO, fmt, args);
147 /* More detailed messages (information that does not need to go to the log). */
150 verbose(const char *fmt,...)
155 do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
159 /* Debugging messages that should not be logged during normal operation. */
162 debug(const char *fmt,...)
167 do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
172 debug2(const char *fmt,...)
177 do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
182 debug3(const char *fmt,...)
187 do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
192 * Initialize the log.
196 log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
198 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
199 struct syslog_data sdata = SYSLOG_DATA_INIT;
205 case SYSLOG_LEVEL_QUIET:
206 case SYSLOG_LEVEL_FATAL:
207 case SYSLOG_LEVEL_ERROR:
208 case SYSLOG_LEVEL_INFO:
209 case SYSLOG_LEVEL_VERBOSE:
210 case SYSLOG_LEVEL_DEBUG1:
211 case SYSLOG_LEVEL_DEBUG2:
212 case SYSLOG_LEVEL_DEBUG3:
216 fprintf(stderr, "Unrecognized internal syslog level code %d\n",
221 log_on_stderr = on_stderr;
226 case SYSLOG_FACILITY_DAEMON:
227 log_facility = LOG_DAEMON;
229 case SYSLOG_FACILITY_USER:
230 log_facility = LOG_USER;
232 case SYSLOG_FACILITY_AUTH:
233 log_facility = LOG_AUTH;
236 case SYSLOG_FACILITY_AUTHPRIV:
237 log_facility = LOG_AUTHPRIV;
240 case SYSLOG_FACILITY_LOCAL0:
241 log_facility = LOG_LOCAL0;
243 case SYSLOG_FACILITY_LOCAL1:
244 log_facility = LOG_LOCAL1;
246 case SYSLOG_FACILITY_LOCAL2:
247 log_facility = LOG_LOCAL2;
249 case SYSLOG_FACILITY_LOCAL3:
250 log_facility = LOG_LOCAL3;
252 case SYSLOG_FACILITY_LOCAL4:
253 log_facility = LOG_LOCAL4;
255 case SYSLOG_FACILITY_LOCAL5:
256 log_facility = LOG_LOCAL5;
258 case SYSLOG_FACILITY_LOCAL6:
259 log_facility = LOG_LOCAL6;
261 case SYSLOG_FACILITY_LOCAL7:
262 log_facility = LOG_LOCAL7;
266 "Unrecognized internal syslog facility code %d\n",
272 * If an external library (eg libwrap) attempts to use syslog
273 * immediately after reexec, syslog may be pointing to the wrong
274 * facility, so we force an open/close of syslog here.
276 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
277 openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
280 openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
285 #define MSGBUFSIZ 1024
288 do_log(LogLevel level, const char *fmt, va_list args)
290 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
291 struct syslog_data sdata = SYSLOG_DATA_INIT;
293 char msgbuf[MSGBUFSIZ];
294 char fmtbuf[MSGBUFSIZ];
298 if (level > log_level)
302 case SYSLOG_LEVEL_FATAL:
307 case SYSLOG_LEVEL_ERROR:
312 case SYSLOG_LEVEL_INFO:
315 case SYSLOG_LEVEL_VERBOSE:
318 case SYSLOG_LEVEL_DEBUG1:
322 case SYSLOG_LEVEL_DEBUG2:
326 case SYSLOG_LEVEL_DEBUG3:
331 txt = "internal error";
336 snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
337 vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
339 vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
341 strnvis(fmtbuf, msgbuf, sizeof(fmtbuf),
342 log_on_stderr ? LOG_STDERR_VIS : LOG_SYSLOG_VIS);
344 snprintf(msgbuf, sizeof msgbuf, "%s\r\n", fmtbuf);
345 write(STDERR_FILENO, msgbuf, strlen(msgbuf));
347 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
348 openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
349 syslog_r(pri, &sdata, "%.500s", fmtbuf);
352 openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
353 syslog(pri, "%.500s", fmtbuf);