1 /* $OpenBSD: log.c,v 1.33 2006/07/10 16:37:36 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.
41 #if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H)
48 static LogLevel log_level = SYSLOG_LEVEL_INFO;
49 static int log_on_stderr = 1;
50 static int log_facility = LOG_AUTH;
53 extern char *__progname;
55 #define LOG_SYSLOG_VIS (VIS_CSTYLE|VIS_NL|VIS_TAB|VIS_OCTAL)
56 #define LOG_STDERR_VIS (VIS_SAFE|VIS_OCTAL)
58 /* textual representation of log-facilities/levels */
63 } log_facilities[] = {
64 { "DAEMON", SYSLOG_FACILITY_DAEMON },
65 { "USER", SYSLOG_FACILITY_USER },
66 { "AUTH", SYSLOG_FACILITY_AUTH },
68 { "AUTHPRIV", SYSLOG_FACILITY_AUTHPRIV },
70 { "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
71 { "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
72 { "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
73 { "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
74 { "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
75 { "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
76 { "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
77 { "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
78 { NULL, SYSLOG_FACILITY_NOT_SET }
86 { "QUIET", SYSLOG_LEVEL_QUIET },
87 { "FATAL", SYSLOG_LEVEL_FATAL },
88 { "ERROR", SYSLOG_LEVEL_ERROR },
89 { "INFO", SYSLOG_LEVEL_INFO },
90 { "VERBOSE", SYSLOG_LEVEL_VERBOSE },
91 { "DEBUG", SYSLOG_LEVEL_DEBUG1 },
92 { "DEBUG1", SYSLOG_LEVEL_DEBUG1 },
93 { "DEBUG2", SYSLOG_LEVEL_DEBUG2 },
94 { "DEBUG3", SYSLOG_LEVEL_DEBUG3 },
95 { NULL, SYSLOG_LEVEL_NOT_SET }
99 log_facility_number(char *name)
104 for (i = 0; log_facilities[i].name; i++)
105 if (strcasecmp(log_facilities[i].name, name) == 0)
106 return log_facilities[i].val;
107 return SYSLOG_FACILITY_NOT_SET;
111 log_level_number(char *name)
116 for (i = 0; log_levels[i].name; i++)
117 if (strcasecmp(log_levels[i].name, name) == 0)
118 return log_levels[i].val;
119 return SYSLOG_LEVEL_NOT_SET;
122 /* Error messages that should be logged. */
125 error(const char *fmt,...)
130 do_log(SYSLOG_LEVEL_ERROR, fmt, args);
134 /* Log this message (information that usually should go to the log). */
137 logit(const char *fmt,...)
142 do_log(SYSLOG_LEVEL_INFO, fmt, args);
146 /* More detailed messages (information that does not need to go to the log). */
149 verbose(const char *fmt,...)
154 do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
158 /* Debugging messages that should not be logged during normal operation. */
161 debug(const char *fmt,...)
166 do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
171 debug2(const char *fmt,...)
176 do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
181 debug3(const char *fmt,...)
186 do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
191 * Initialize the log.
195 log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
197 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
198 struct syslog_data sdata = SYSLOG_DATA_INIT;
204 case SYSLOG_LEVEL_QUIET:
205 case SYSLOG_LEVEL_FATAL:
206 case SYSLOG_LEVEL_ERROR:
207 case SYSLOG_LEVEL_INFO:
208 case SYSLOG_LEVEL_VERBOSE:
209 case SYSLOG_LEVEL_DEBUG1:
210 case SYSLOG_LEVEL_DEBUG2:
211 case SYSLOG_LEVEL_DEBUG3:
215 fprintf(stderr, "Unrecognized internal syslog level code %d\n",
220 log_on_stderr = on_stderr;
225 case SYSLOG_FACILITY_DAEMON:
226 log_facility = LOG_DAEMON;
228 case SYSLOG_FACILITY_USER:
229 log_facility = LOG_USER;
231 case SYSLOG_FACILITY_AUTH:
232 log_facility = LOG_AUTH;
235 case SYSLOG_FACILITY_AUTHPRIV:
236 log_facility = LOG_AUTHPRIV;
239 case SYSLOG_FACILITY_LOCAL0:
240 log_facility = LOG_LOCAL0;
242 case SYSLOG_FACILITY_LOCAL1:
243 log_facility = LOG_LOCAL1;
245 case SYSLOG_FACILITY_LOCAL2:
246 log_facility = LOG_LOCAL2;
248 case SYSLOG_FACILITY_LOCAL3:
249 log_facility = LOG_LOCAL3;
251 case SYSLOG_FACILITY_LOCAL4:
252 log_facility = LOG_LOCAL4;
254 case SYSLOG_FACILITY_LOCAL5:
255 log_facility = LOG_LOCAL5;
257 case SYSLOG_FACILITY_LOCAL6:
258 log_facility = LOG_LOCAL6;
260 case SYSLOG_FACILITY_LOCAL7:
261 log_facility = LOG_LOCAL7;
265 "Unrecognized internal syslog facility code %d\n",
271 * If an external library (eg libwrap) attempts to use syslog
272 * immediately after reexec, syslog may be pointing to the wrong
273 * facility, so we force an open/close of syslog here.
275 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
276 openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
279 openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
284 #define MSGBUFSIZ 1024
287 do_log(LogLevel level, const char *fmt, va_list args)
289 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
290 struct syslog_data sdata = SYSLOG_DATA_INIT;
292 char msgbuf[MSGBUFSIZ];
293 char fmtbuf[MSGBUFSIZ];
297 if (level > log_level)
301 case SYSLOG_LEVEL_FATAL:
306 case SYSLOG_LEVEL_ERROR:
311 case SYSLOG_LEVEL_INFO:
314 case SYSLOG_LEVEL_VERBOSE:
317 case SYSLOG_LEVEL_DEBUG1:
321 case SYSLOG_LEVEL_DEBUG2:
325 case SYSLOG_LEVEL_DEBUG3:
330 txt = "internal error";
335 snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
336 vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
338 vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
340 strnvis(fmtbuf, msgbuf, sizeof(fmtbuf),
341 log_on_stderr ? LOG_STDERR_VIS : LOG_SYSLOG_VIS);
343 snprintf(msgbuf, sizeof msgbuf, "%s\r\n", fmtbuf);
344 write(STDERR_FILENO, msgbuf, strlen(msgbuf));
346 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
347 openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
348 syslog_r(pri, &sdata, "%.500s", fmtbuf);
351 openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
352 syslog(pri, "%.500s", fmtbuf);