Annotation of src/usr.bin/ssh/log.c, Revision 1.41
1.41 ! dtucker 1: /* $OpenBSD: log.c,v 1.40 2007/05/17 07:50:31 djm Exp $ */
1.1 markus 2: /*
1.9 markus 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
6: *
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".
12: */
13: /*
1.8 deraadt 14: * Copyright (c) 2000 Markus Friedl. All rights reserved.
15: *
16: * Redistribution and use in source and binary forms, with or without
17: * modification, are permitted provided that the following conditions
18: * are met:
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.
24: *
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.
1.6 markus 35: */
1.1 markus 36:
1.38 deraadt 37: #include <sys/types.h>
1.1 markus 38:
1.33 stevesk 39: #include <stdarg.h>
1.37 stevesk 40: #include <stdio.h>
1.36 stevesk 41: #include <stdlib.h>
1.35 stevesk 42: #include <string.h>
1.32 stevesk 43: #include <syslog.h>
1.34 stevesk 44: #include <unistd.h>
1.40 djm 45: #include <errno.h>
1.32 stevesk 46: #include <vis.h>
47:
1.38 deraadt 48: #include "xmalloc.h"
1.15 markus 49: #include "log.h"
1.16 markus 50:
51: static LogLevel log_level = SYSLOG_LEVEL_INFO;
52: static int log_on_stderr = 1;
53: static int log_facility = LOG_AUTH;
54: static char *argv0;
55:
56: extern char *__progname;
57:
58: /* textual representation of log-facilities/levels */
59:
60: static struct {
61: const char *name;
62: SyslogFacility val;
63: } log_facilities[] = {
64: { "DAEMON", SYSLOG_FACILITY_DAEMON },
65: { "USER", SYSLOG_FACILITY_USER },
66: { "AUTH", SYSLOG_FACILITY_AUTH },
67: { "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
68: { "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
69: { "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
70: { "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
71: { "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
72: { "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
73: { "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
74: { "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
1.21 markus 75: { NULL, SYSLOG_FACILITY_NOT_SET }
1.16 markus 76: };
77:
78: static struct {
79: const char *name;
80: LogLevel val;
81: } log_levels[] =
82: {
83: { "QUIET", SYSLOG_LEVEL_QUIET },
84: { "FATAL", SYSLOG_LEVEL_FATAL },
85: { "ERROR", SYSLOG_LEVEL_ERROR },
86: { "INFO", SYSLOG_LEVEL_INFO },
87: { "VERBOSE", SYSLOG_LEVEL_VERBOSE },
88: { "DEBUG", SYSLOG_LEVEL_DEBUG1 },
89: { "DEBUG1", SYSLOG_LEVEL_DEBUG1 },
90: { "DEBUG2", SYSLOG_LEVEL_DEBUG2 },
91: { "DEBUG3", SYSLOG_LEVEL_DEBUG3 },
1.21 markus 92: { NULL, SYSLOG_LEVEL_NOT_SET }
1.16 markus 93: };
94:
95: SyslogFacility
96: log_facility_number(char *name)
97: {
98: int i;
1.23 deraadt 99:
1.16 markus 100: if (name != NULL)
101: for (i = 0; log_facilities[i].name; i++)
102: if (strcasecmp(log_facilities[i].name, name) == 0)
103: return log_facilities[i].val;
1.21 markus 104: return SYSLOG_FACILITY_NOT_SET;
1.16 markus 105: }
106:
1.41 ! dtucker 107: const char *
! 108: log_facility_name(SyslogFacility facility)
! 109: {
! 110: u_int i;
! 111:
! 112: for (i = 0; log_facilities[i].name; i++)
! 113: if (log_facilities[i].val == facility)
! 114: return log_facilities[i].name;
! 115: return NULL;
! 116: }
! 117:
1.16 markus 118: LogLevel
119: log_level_number(char *name)
120: {
121: int i;
1.23 deraadt 122:
1.16 markus 123: if (name != NULL)
124: for (i = 0; log_levels[i].name; i++)
125: if (strcasecmp(log_levels[i].name, name) == 0)
126: return log_levels[i].val;
1.21 markus 127: return SYSLOG_LEVEL_NOT_SET;
1.41 ! dtucker 128: }
! 129:
! 130: const char *
! 131: log_level_name(LogLevel level)
! 132: {
! 133: u_int i;
! 134:
! 135: for (i = 0; log_levels[i].name != NULL; i++)
! 136: if (log_levels[i].val == level)
! 137: return log_levels[i].name;
! 138: return NULL;
1.16 markus 139: }
1.1 markus 140:
141: /* Error messages that should be logged. */
142:
143: void
1.4 markus 144: error(const char *fmt,...)
1.1 markus 145: {
1.4 markus 146: va_list args;
1.23 deraadt 147:
1.4 markus 148: va_start(args, fmt);
149: do_log(SYSLOG_LEVEL_ERROR, fmt, args);
150: va_end(args);
1.1 markus 151: }
1.39 deraadt 152:
153: void
154: sigdie(const char *fmt,...)
155: {
156: va_list args;
157:
158: va_start(args, fmt);
159: do_log(SYSLOG_LEVEL_FATAL, fmt, args);
160: va_end(args);
161: _exit(1);
162: }
163:
1.1 markus 164:
165: /* Log this message (information that usually should go to the log). */
166:
167: void
1.26 itojun 168: logit(const char *fmt,...)
1.1 markus 169: {
1.4 markus 170: va_list args;
1.23 deraadt 171:
1.4 markus 172: va_start(args, fmt);
1.14 markus 173: do_log(SYSLOG_LEVEL_INFO, fmt, args);
1.4 markus 174: va_end(args);
1.1 markus 175: }
176:
177: /* More detailed messages (information that does not need to go to the log). */
178:
179: void
1.4 markus 180: verbose(const char *fmt,...)
1.1 markus 181: {
1.4 markus 182: va_list args;
1.23 deraadt 183:
1.4 markus 184: va_start(args, fmt);
185: do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
186: va_end(args);
1.1 markus 187: }
188:
189: /* Debugging messages that should not be logged during normal operation. */
190:
191: void
1.4 markus 192: debug(const char *fmt,...)
1.1 markus 193: {
1.4 markus 194: va_list args;
1.23 deraadt 195:
1.4 markus 196: va_start(args, fmt);
1.10 markus 197: do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
198: va_end(args);
199: }
200:
201: void
202: debug2(const char *fmt,...)
203: {
204: va_list args;
1.23 deraadt 205:
1.10 markus 206: va_start(args, fmt);
207: do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
208: va_end(args);
209: }
210:
211: void
212: debug3(const char *fmt,...)
213: {
214: va_list args;
1.23 deraadt 215:
1.10 markus 216: va_start(args, fmt);
217: do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
1.4 markus 218: va_end(args);
1.1 markus 219: }
1.2 markus 220:
1.16 markus 221: /*
222: * Initialize the log.
223: */
1.2 markus 224:
1.16 markus 225: void
226: log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
1.2 markus 227: {
1.16 markus 228: argv0 = av0;
229:
230: switch (level) {
231: case SYSLOG_LEVEL_QUIET:
232: case SYSLOG_LEVEL_FATAL:
233: case SYSLOG_LEVEL_ERROR:
234: case SYSLOG_LEVEL_INFO:
235: case SYSLOG_LEVEL_VERBOSE:
236: case SYSLOG_LEVEL_DEBUG1:
237: case SYSLOG_LEVEL_DEBUG2:
238: case SYSLOG_LEVEL_DEBUG3:
239: log_level = level;
240: break;
241: default:
242: fprintf(stderr, "Unrecognized internal syslog level code %d\n",
243: (int) level);
244: exit(1);
245: }
1.2 markus 246:
1.16 markus 247: log_on_stderr = on_stderr;
248: if (on_stderr)
249: return;
250:
251: switch (facility) {
252: case SYSLOG_FACILITY_DAEMON:
253: log_facility = LOG_DAEMON;
254: break;
255: case SYSLOG_FACILITY_USER:
256: log_facility = LOG_USER;
257: break;
258: case SYSLOG_FACILITY_AUTH:
259: log_facility = LOG_AUTH;
260: break;
261: case SYSLOG_FACILITY_LOCAL0:
262: log_facility = LOG_LOCAL0;
263: break;
264: case SYSLOG_FACILITY_LOCAL1:
265: log_facility = LOG_LOCAL1;
266: break;
267: case SYSLOG_FACILITY_LOCAL2:
268: log_facility = LOG_LOCAL2;
269: break;
270: case SYSLOG_FACILITY_LOCAL3:
271: log_facility = LOG_LOCAL3;
272: break;
273: case SYSLOG_FACILITY_LOCAL4:
274: log_facility = LOG_LOCAL4;
275: break;
276: case SYSLOG_FACILITY_LOCAL5:
277: log_facility = LOG_LOCAL5;
278: break;
279: case SYSLOG_FACILITY_LOCAL6:
280: log_facility = LOG_LOCAL6;
281: break;
282: case SYSLOG_FACILITY_LOCAL7:
283: log_facility = LOG_LOCAL7;
284: break;
285: default:
286: fprintf(stderr,
287: "Unrecognized internal syslog facility code %d\n",
288: (int) facility);
289: exit(1);
290: }
1.2 markus 291: }
292:
1.16 markus 293: #define MSGBUFSIZ 1024
294:
1.22 markus 295: void
1.16 markus 296: do_log(LogLevel level, const char *fmt, va_list args)
1.2 markus 297: {
1.27 deraadt 298: struct syslog_data sdata = SYSLOG_DATA_INIT;
1.16 markus 299: char msgbuf[MSGBUFSIZ];
300: char fmtbuf[MSGBUFSIZ];
301: char *txt = NULL;
302: int pri = LOG_INFO;
1.40 djm 303: int saved_errno = errno;
1.16 markus 304:
305: if (level > log_level)
306: return;
307:
308: switch (level) {
309: case SYSLOG_LEVEL_FATAL:
310: if (!log_on_stderr)
311: txt = "fatal";
312: pri = LOG_CRIT;
313: break;
314: case SYSLOG_LEVEL_ERROR:
315: if (!log_on_stderr)
316: txt = "error";
317: pri = LOG_ERR;
318: break;
319: case SYSLOG_LEVEL_INFO:
320: pri = LOG_INFO;
321: break;
322: case SYSLOG_LEVEL_VERBOSE:
323: pri = LOG_INFO;
324: break;
325: case SYSLOG_LEVEL_DEBUG1:
326: txt = "debug1";
327: pri = LOG_DEBUG;
328: break;
329: case SYSLOG_LEVEL_DEBUG2:
330: txt = "debug2";
331: pri = LOG_DEBUG;
332: break;
333: case SYSLOG_LEVEL_DEBUG3:
334: txt = "debug3";
335: pri = LOG_DEBUG;
336: break;
337: default:
338: txt = "internal error";
339: pri = LOG_ERR;
340: break;
341: }
342: if (txt != NULL) {
343: snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
344: vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
345: } else {
346: vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
347: }
1.28 djm 348: strnvis(fmtbuf, msgbuf, sizeof(fmtbuf), VIS_SAFE|VIS_OCTAL);
1.16 markus 349: if (log_on_stderr) {
1.28 djm 350: snprintf(msgbuf, sizeof msgbuf, "%s\r\n", fmtbuf);
351: write(STDERR_FILENO, msgbuf, strlen(msgbuf));
1.16 markus 352: } else {
1.27 deraadt 353: openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
1.28 djm 354: syslog_r(pri, &sdata, "%.500s", fmtbuf);
1.27 deraadt 355: closelog_r(&sdata);
1.16 markus 356: }
1.40 djm 357: errno = saved_errno;
1.1 markus 358: }
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