1 /* $OpenBSD: log.c,v 1.39 2006/08/18 09:13:25 deraadt 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>
47 #if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H)
54 static LogLevel log_level = SYSLOG_LEVEL_INFO;
55 static int log_on_stderr = 1;
56 static int log_facility = LOG_AUTH;
59 extern char *__progname;
61 #define LOG_SYSLOG_VIS (VIS_CSTYLE|VIS_NL|VIS_TAB|VIS_OCTAL)
62 #define LOG_STDERR_VIS (VIS_SAFE|VIS_OCTAL)
64 /* textual representation of log-facilities/levels */
69 } log_facilities[] = {
70 { "DAEMON", SYSLOG_FACILITY_DAEMON },
71 { "USER", SYSLOG_FACILITY_USER },
72 { "AUTH", SYSLOG_FACILITY_AUTH },
74 { "AUTHPRIV", SYSLOG_FACILITY_AUTHPRIV },
76 { "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
77 { "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
78 { "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
79 { "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
80 { "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
81 { "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
82 { "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
83 { "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
84 { NULL, SYSLOG_FACILITY_NOT_SET }
92 { "QUIET", SYSLOG_LEVEL_QUIET },
93 { "FATAL", SYSLOG_LEVEL_FATAL },
94 { "ERROR", SYSLOG_LEVEL_ERROR },
95 { "INFO", SYSLOG_LEVEL_INFO },
96 { "VERBOSE", SYSLOG_LEVEL_VERBOSE },
97 { "DEBUG", SYSLOG_LEVEL_DEBUG1 },
98 { "DEBUG1", SYSLOG_LEVEL_DEBUG1 },
99 { "DEBUG2", SYSLOG_LEVEL_DEBUG2 },
100 { "DEBUG3", SYSLOG_LEVEL_DEBUG3 },
101 { NULL, SYSLOG_LEVEL_NOT_SET }
105 log_facility_number(char *name)
110 for (i = 0; log_facilities[i].name; i++)
111 if (strcasecmp(log_facilities[i].name, name) == 0)
112 return log_facilities[i].val;
113 return SYSLOG_FACILITY_NOT_SET;
117 log_level_number(char *name)
122 for (i = 0; log_levels[i].name; i++)
123 if (strcasecmp(log_levels[i].name, name) == 0)
124 return log_levels[i].val;
125 return SYSLOG_LEVEL_NOT_SET;
128 /* Error messages that should be logged. */
131 error(const char *fmt,...)
136 do_log(SYSLOG_LEVEL_ERROR, fmt, args);
141 sigdie(const char *fmt,...)
143 #ifdef DO_LOG_SAFE_IN_SIGHAND
147 do_log(SYSLOG_LEVEL_FATAL, fmt, args);
154 /* Log this message (information that usually should go to the log). */
157 logit(const char *fmt,...)
162 do_log(SYSLOG_LEVEL_INFO, fmt, args);
166 /* More detailed messages (information that does not need to go to the log). */
169 verbose(const char *fmt,...)
174 do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
178 /* Debugging messages that should not be logged during normal operation. */
181 debug(const char *fmt,...)
186 do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
191 debug2(const char *fmt,...)
196 do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
201 debug3(const char *fmt,...)
206 do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
211 * Initialize the log.
215 log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
217 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
218 struct syslog_data sdata = SYSLOG_DATA_INIT;
224 case SYSLOG_LEVEL_QUIET:
225 case SYSLOG_LEVEL_FATAL:
226 case SYSLOG_LEVEL_ERROR:
227 case SYSLOG_LEVEL_INFO:
228 case SYSLOG_LEVEL_VERBOSE:
229 case SYSLOG_LEVEL_DEBUG1:
230 case SYSLOG_LEVEL_DEBUG2:
231 case SYSLOG_LEVEL_DEBUG3:
235 fprintf(stderr, "Unrecognized internal syslog level code %d\n",
240 log_on_stderr = on_stderr;
245 case SYSLOG_FACILITY_DAEMON:
246 log_facility = LOG_DAEMON;
248 case SYSLOG_FACILITY_USER:
249 log_facility = LOG_USER;
251 case SYSLOG_FACILITY_AUTH:
252 log_facility = LOG_AUTH;
255 case SYSLOG_FACILITY_AUTHPRIV:
256 log_facility = LOG_AUTHPRIV;
259 case SYSLOG_FACILITY_LOCAL0:
260 log_facility = LOG_LOCAL0;
262 case SYSLOG_FACILITY_LOCAL1:
263 log_facility = LOG_LOCAL1;
265 case SYSLOG_FACILITY_LOCAL2:
266 log_facility = LOG_LOCAL2;
268 case SYSLOG_FACILITY_LOCAL3:
269 log_facility = LOG_LOCAL3;
271 case SYSLOG_FACILITY_LOCAL4:
272 log_facility = LOG_LOCAL4;
274 case SYSLOG_FACILITY_LOCAL5:
275 log_facility = LOG_LOCAL5;
277 case SYSLOG_FACILITY_LOCAL6:
278 log_facility = LOG_LOCAL6;
280 case SYSLOG_FACILITY_LOCAL7:
281 log_facility = LOG_LOCAL7;
285 "Unrecognized internal syslog facility code %d\n",
291 * If an external library (eg libwrap) attempts to use syslog
292 * immediately after reexec, syslog may be pointing to the wrong
293 * facility, so we force an open/close of syslog here.
295 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
296 openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
299 openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
304 #define MSGBUFSIZ 1024
307 do_log(LogLevel level, const char *fmt, va_list args)
309 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
310 struct syslog_data sdata = SYSLOG_DATA_INIT;
312 char msgbuf[MSGBUFSIZ];
313 char fmtbuf[MSGBUFSIZ];
317 if (level > log_level)
321 case SYSLOG_LEVEL_FATAL:
326 case SYSLOG_LEVEL_ERROR:
331 case SYSLOG_LEVEL_INFO:
334 case SYSLOG_LEVEL_VERBOSE:
337 case SYSLOG_LEVEL_DEBUG1:
341 case SYSLOG_LEVEL_DEBUG2:
345 case SYSLOG_LEVEL_DEBUG3:
350 txt = "internal error";
355 snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
356 vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
358 vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
360 strnvis(fmtbuf, msgbuf, sizeof(fmtbuf),
361 log_on_stderr ? LOG_STDERR_VIS : LOG_SYSLOG_VIS);
363 snprintf(msgbuf, sizeof msgbuf, "%s\r\n", fmtbuf);
364 write(STDERR_FILENO, msgbuf, strlen(msgbuf));
366 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
367 openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
368 syslog_r(pri, &sdata, "%.500s", fmtbuf);
371 openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
372 syslog(pri, "%.500s", fmtbuf);