1 /* $OpenBSD: log.c,v 1.37 2006/08/01 23:22:47 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.
45 #if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H)
52 static LogLevel log_level = SYSLOG_LEVEL_INFO;
53 static int log_on_stderr = 1;
54 static int log_facility = LOG_AUTH;
57 extern char *__progname;
59 #define LOG_SYSLOG_VIS (VIS_CSTYLE|VIS_NL|VIS_TAB|VIS_OCTAL)
60 #define LOG_STDERR_VIS (VIS_SAFE|VIS_OCTAL)
62 /* textual representation of log-facilities/levels */
67 } log_facilities[] = {
68 { "DAEMON", SYSLOG_FACILITY_DAEMON },
69 { "USER", SYSLOG_FACILITY_USER },
70 { "AUTH", SYSLOG_FACILITY_AUTH },
72 { "AUTHPRIV", SYSLOG_FACILITY_AUTHPRIV },
74 { "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
75 { "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
76 { "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
77 { "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
78 { "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
79 { "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
80 { "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
81 { "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
82 { NULL, SYSLOG_FACILITY_NOT_SET }
90 { "QUIET", SYSLOG_LEVEL_QUIET },
91 { "FATAL", SYSLOG_LEVEL_FATAL },
92 { "ERROR", SYSLOG_LEVEL_ERROR },
93 { "INFO", SYSLOG_LEVEL_INFO },
94 { "VERBOSE", SYSLOG_LEVEL_VERBOSE },
95 { "DEBUG", SYSLOG_LEVEL_DEBUG1 },
96 { "DEBUG1", SYSLOG_LEVEL_DEBUG1 },
97 { "DEBUG2", SYSLOG_LEVEL_DEBUG2 },
98 { "DEBUG3", SYSLOG_LEVEL_DEBUG3 },
99 { NULL, SYSLOG_LEVEL_NOT_SET }
103 log_facility_number(char *name)
108 for (i = 0; log_facilities[i].name; i++)
109 if (strcasecmp(log_facilities[i].name, name) == 0)
110 return log_facilities[i].val;
111 return SYSLOG_FACILITY_NOT_SET;
115 log_level_number(char *name)
120 for (i = 0; log_levels[i].name; i++)
121 if (strcasecmp(log_levels[i].name, name) == 0)
122 return log_levels[i].val;
123 return SYSLOG_LEVEL_NOT_SET;
126 /* Error messages that should be logged. */
129 error(const char *fmt,...)
134 do_log(SYSLOG_LEVEL_ERROR, fmt, args);
138 /* Log this message (information that usually should go to the log). */
141 logit(const char *fmt,...)
146 do_log(SYSLOG_LEVEL_INFO, fmt, args);
150 /* More detailed messages (information that does not need to go to the log). */
153 verbose(const char *fmt,...)
158 do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
162 /* Debugging messages that should not be logged during normal operation. */
165 debug(const char *fmt,...)
170 do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
175 debug2(const char *fmt,...)
180 do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
185 debug3(const char *fmt,...)
190 do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
195 * Initialize the log.
199 log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
201 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
202 struct syslog_data sdata = SYSLOG_DATA_INIT;
208 case SYSLOG_LEVEL_QUIET:
209 case SYSLOG_LEVEL_FATAL:
210 case SYSLOG_LEVEL_ERROR:
211 case SYSLOG_LEVEL_INFO:
212 case SYSLOG_LEVEL_VERBOSE:
213 case SYSLOG_LEVEL_DEBUG1:
214 case SYSLOG_LEVEL_DEBUG2:
215 case SYSLOG_LEVEL_DEBUG3:
219 fprintf(stderr, "Unrecognized internal syslog level code %d\n",
224 log_on_stderr = on_stderr;
229 case SYSLOG_FACILITY_DAEMON:
230 log_facility = LOG_DAEMON;
232 case SYSLOG_FACILITY_USER:
233 log_facility = LOG_USER;
235 case SYSLOG_FACILITY_AUTH:
236 log_facility = LOG_AUTH;
239 case SYSLOG_FACILITY_AUTHPRIV:
240 log_facility = LOG_AUTHPRIV;
243 case SYSLOG_FACILITY_LOCAL0:
244 log_facility = LOG_LOCAL0;
246 case SYSLOG_FACILITY_LOCAL1:
247 log_facility = LOG_LOCAL1;
249 case SYSLOG_FACILITY_LOCAL2:
250 log_facility = LOG_LOCAL2;
252 case SYSLOG_FACILITY_LOCAL3:
253 log_facility = LOG_LOCAL3;
255 case SYSLOG_FACILITY_LOCAL4:
256 log_facility = LOG_LOCAL4;
258 case SYSLOG_FACILITY_LOCAL5:
259 log_facility = LOG_LOCAL5;
261 case SYSLOG_FACILITY_LOCAL6:
262 log_facility = LOG_LOCAL6;
264 case SYSLOG_FACILITY_LOCAL7:
265 log_facility = LOG_LOCAL7;
269 "Unrecognized internal syslog facility code %d\n",
275 * If an external library (eg libwrap) attempts to use syslog
276 * immediately after reexec, syslog may be pointing to the wrong
277 * facility, so we force an open/close of syslog here.
279 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
280 openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
283 openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
288 #define MSGBUFSIZ 1024
291 do_log(LogLevel level, const char *fmt, va_list args)
293 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
294 struct syslog_data sdata = SYSLOG_DATA_INIT;
296 char msgbuf[MSGBUFSIZ];
297 char fmtbuf[MSGBUFSIZ];
301 if (level > log_level)
305 case SYSLOG_LEVEL_FATAL:
310 case SYSLOG_LEVEL_ERROR:
315 case SYSLOG_LEVEL_INFO:
318 case SYSLOG_LEVEL_VERBOSE:
321 case SYSLOG_LEVEL_DEBUG1:
325 case SYSLOG_LEVEL_DEBUG2:
329 case SYSLOG_LEVEL_DEBUG3:
334 txt = "internal error";
339 snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
340 vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
342 vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
344 strnvis(fmtbuf, msgbuf, sizeof(fmtbuf),
345 log_on_stderr ? LOG_STDERR_VIS : LOG_SYSLOG_VIS);
347 snprintf(msgbuf, sizeof msgbuf, "%s\r\n", fmtbuf);
348 write(STDERR_FILENO, msgbuf, strlen(msgbuf));
350 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
351 openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
352 syslog_r(pri, &sdata, "%.500s", fmtbuf);
355 openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
356 syslog(pri, "%.500s", fmtbuf);