2 * Author: Tatu Ylonen <ylo@cs.hut.fi>
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
6 * As far as I am concerned, the code I have written for this software
7 * can be used freely for any purpose. Any derived versions of this
8 * software must be clearly marked as such, and if the derived work is
9 * incompatible with the protocol description in the RFC file, it must be
10 * called by a name other than "ssh" or "Secure Shell".
13 * Copyright (c) 2000 Markus Friedl. All rights reserved.
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 #if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H)
46 static LogLevel log_level = SYSLOG_LEVEL_INFO;
47 static int log_on_stderr = 1;
48 static int log_facility = LOG_AUTH;
51 extern char *__progname;
53 #define LOG_SYSLOG_VIS (VIS_CSTYLE|VIS_NL|VIS_TAB|VIS_OCTAL)
54 #define LOG_STDERR_VIS (VIS_SAFE|VIS_OCTAL)
56 /* textual representation of log-facilities/levels */
61 } log_facilities[] = {
62 { "DAEMON", SYSLOG_FACILITY_DAEMON },
63 { "USER", SYSLOG_FACILITY_USER },
64 { "AUTH", SYSLOG_FACILITY_AUTH },
66 { "AUTHPRIV", SYSLOG_FACILITY_AUTHPRIV },
68 { "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
69 { "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
70 { "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
71 { "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
72 { "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
73 { "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
74 { "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
75 { "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
76 { NULL, SYSLOG_FACILITY_NOT_SET }
84 { "QUIET", SYSLOG_LEVEL_QUIET },
85 { "FATAL", SYSLOG_LEVEL_FATAL },
86 { "ERROR", SYSLOG_LEVEL_ERROR },
87 { "INFO", SYSLOG_LEVEL_INFO },
88 { "VERBOSE", SYSLOG_LEVEL_VERBOSE },
89 { "DEBUG", SYSLOG_LEVEL_DEBUG1 },
90 { "DEBUG1", SYSLOG_LEVEL_DEBUG1 },
91 { "DEBUG2", SYSLOG_LEVEL_DEBUG2 },
92 { "DEBUG3", SYSLOG_LEVEL_DEBUG3 },
93 { NULL, SYSLOG_LEVEL_NOT_SET }
97 log_facility_number(char *name)
102 for (i = 0; log_facilities[i].name; i++)
103 if (strcasecmp(log_facilities[i].name, name) == 0)
104 return log_facilities[i].val;
105 return SYSLOG_FACILITY_NOT_SET;
109 log_level_number(char *name)
114 for (i = 0; log_levels[i].name; i++)
115 if (strcasecmp(log_levels[i].name, name) == 0)
116 return log_levels[i].val;
117 return SYSLOG_LEVEL_NOT_SET;
120 /* Error messages that should be logged. */
123 error(const char *fmt,...)
128 do_log(SYSLOG_LEVEL_ERROR, fmt, args);
132 /* Log this message (information that usually should go to the log). */
135 logit(const char *fmt,...)
140 do_log(SYSLOG_LEVEL_INFO, fmt, args);
144 /* More detailed messages (information that does not need to go to the log). */
147 verbose(const char *fmt,...)
152 do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
156 /* Debugging messages that should not be logged during normal operation. */
159 debug(const char *fmt,...)
164 do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
169 debug2(const char *fmt,...)
174 do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
179 debug3(const char *fmt,...)
184 do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
189 * Initialize the log.
193 log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
195 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
196 struct syslog_data sdata = SYSLOG_DATA_INIT;
202 case SYSLOG_LEVEL_QUIET:
203 case SYSLOG_LEVEL_FATAL:
204 case SYSLOG_LEVEL_ERROR:
205 case SYSLOG_LEVEL_INFO:
206 case SYSLOG_LEVEL_VERBOSE:
207 case SYSLOG_LEVEL_DEBUG1:
208 case SYSLOG_LEVEL_DEBUG2:
209 case SYSLOG_LEVEL_DEBUG3:
213 fprintf(stderr, "Unrecognized internal syslog level code %d\n",
218 log_on_stderr = on_stderr;
223 case SYSLOG_FACILITY_DAEMON:
224 log_facility = LOG_DAEMON;
226 case SYSLOG_FACILITY_USER:
227 log_facility = LOG_USER;
229 case SYSLOG_FACILITY_AUTH:
230 log_facility = LOG_AUTH;
233 case SYSLOG_FACILITY_AUTHPRIV:
234 log_facility = LOG_AUTHPRIV;
237 case SYSLOG_FACILITY_LOCAL0:
238 log_facility = LOG_LOCAL0;
240 case SYSLOG_FACILITY_LOCAL1:
241 log_facility = LOG_LOCAL1;
243 case SYSLOG_FACILITY_LOCAL2:
244 log_facility = LOG_LOCAL2;
246 case SYSLOG_FACILITY_LOCAL3:
247 log_facility = LOG_LOCAL3;
249 case SYSLOG_FACILITY_LOCAL4:
250 log_facility = LOG_LOCAL4;
252 case SYSLOG_FACILITY_LOCAL5:
253 log_facility = LOG_LOCAL5;
255 case SYSLOG_FACILITY_LOCAL6:
256 log_facility = LOG_LOCAL6;
258 case SYSLOG_FACILITY_LOCAL7:
259 log_facility = LOG_LOCAL7;
263 "Unrecognized internal syslog facility code %d\n",
269 * If an external library (eg libwrap) attempts to use syslog
270 * immediately after reexec, syslog may be pointing to the wrong
271 * facility, so we force an open/close of syslog here.
273 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
274 openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
277 openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
282 #define MSGBUFSIZ 1024
285 do_log(LogLevel level, const char *fmt, va_list args)
287 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
288 struct syslog_data sdata = SYSLOG_DATA_INIT;
290 char msgbuf[MSGBUFSIZ];
291 char fmtbuf[MSGBUFSIZ];
295 if (level > log_level)
299 case SYSLOG_LEVEL_FATAL:
304 case SYSLOG_LEVEL_ERROR:
309 case SYSLOG_LEVEL_INFO:
312 case SYSLOG_LEVEL_VERBOSE:
315 case SYSLOG_LEVEL_DEBUG1:
319 case SYSLOG_LEVEL_DEBUG2:
323 case SYSLOG_LEVEL_DEBUG3:
328 txt = "internal error";
333 snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
334 vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
336 vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
338 strnvis(fmtbuf, msgbuf, sizeof(fmtbuf),
339 log_on_stderr ? LOG_STDERR_VIS : LOG_SYSLOG_VIS);
341 snprintf(msgbuf, sizeof msgbuf, "%s\r\n", fmtbuf);
342 write(STDERR_FILENO, msgbuf, strlen(msgbuf));
344 #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
345 openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
346 syslog_r(pri, &sdata, "%.500s", fmtbuf);
349 openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
350 syslog(pri, "%.500s", fmtbuf);