Annotation of src/usr.bin/ssh/log.c, Revision 1.11.2.6
1.1 markus 1: /*
1.9 markus 2: * Author: Tatu Ylonen <ylo@cs.hut.fi>
3: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4: * All rights reserved
5: *
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".
11: */
12: /*
1.8 deraadt 13: * Copyright (c) 2000 Markus Friedl. All rights reserved.
14: *
15: * Redistribution and use in source and binary forms, with or without
16: * modification, are permitted provided that the following conditions
17: * are met:
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.
23: *
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.
1.6 markus 34: */
1.1 markus 35:
36: #include "includes.h"
1.11.2.6! brad 37: RCSID("$OpenBSD: log.c,v 1.22 2002/02/22 12:20:34 markus Exp $");
1.1 markus 38:
1.11.2.1 jason 39: #include "log.h"
1.1 markus 40: #include "xmalloc.h"
41:
1.11.2.3 jason 42: #include <syslog.h>
43:
44: static LogLevel log_level = SYSLOG_LEVEL_INFO;
45: static int log_on_stderr = 1;
46: static int log_facility = LOG_AUTH;
47: static char *argv0;
48:
49: extern char *__progname;
50:
51: /* textual representation of log-facilities/levels */
52:
53: static struct {
54: const char *name;
55: SyslogFacility val;
56: } log_facilities[] = {
57: { "DAEMON", SYSLOG_FACILITY_DAEMON },
58: { "USER", SYSLOG_FACILITY_USER },
59: { "AUTH", SYSLOG_FACILITY_AUTH },
60: { "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
61: { "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
62: { "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
63: { "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
64: { "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
65: { "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
66: { "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
67: { "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
1.11.2.6! brad 68: { NULL, SYSLOG_FACILITY_NOT_SET }
1.11.2.3 jason 69: };
70:
71: static struct {
72: const char *name;
73: LogLevel val;
74: } log_levels[] =
75: {
76: { "QUIET", SYSLOG_LEVEL_QUIET },
77: { "FATAL", SYSLOG_LEVEL_FATAL },
78: { "ERROR", SYSLOG_LEVEL_ERROR },
79: { "INFO", SYSLOG_LEVEL_INFO },
80: { "VERBOSE", SYSLOG_LEVEL_VERBOSE },
81: { "DEBUG", SYSLOG_LEVEL_DEBUG1 },
82: { "DEBUG1", SYSLOG_LEVEL_DEBUG1 },
83: { "DEBUG2", SYSLOG_LEVEL_DEBUG2 },
84: { "DEBUG3", SYSLOG_LEVEL_DEBUG3 },
1.11.2.6! brad 85: { NULL, SYSLOG_LEVEL_NOT_SET }
1.11.2.3 jason 86: };
87:
88: SyslogFacility
89: log_facility_number(char *name)
90: {
91: int i;
92: if (name != NULL)
93: for (i = 0; log_facilities[i].name; i++)
94: if (strcasecmp(log_facilities[i].name, name) == 0)
95: return log_facilities[i].val;
1.11.2.6! brad 96: return SYSLOG_FACILITY_NOT_SET;
1.11.2.3 jason 97: }
98:
99: LogLevel
100: log_level_number(char *name)
101: {
102: int i;
103: if (name != NULL)
104: for (i = 0; log_levels[i].name; i++)
105: if (strcasecmp(log_levels[i].name, name) == 0)
106: return log_levels[i].val;
1.11.2.6! brad 107: return SYSLOG_LEVEL_NOT_SET;
1.1 markus 108: }
109:
110: /* Error messages that should be logged. */
111:
112: void
1.4 markus 113: error(const char *fmt,...)
1.1 markus 114: {
1.4 markus 115: va_list args;
116: va_start(args, fmt);
117: do_log(SYSLOG_LEVEL_ERROR, fmt, args);
118: va_end(args);
1.1 markus 119: }
120:
121: /* Log this message (information that usually should go to the log). */
122:
123: void
1.4 markus 124: log(const char *fmt,...)
1.1 markus 125: {
1.4 markus 126: va_list args;
127: va_start(args, fmt);
128: do_log(SYSLOG_LEVEL_INFO, fmt, args);
129: va_end(args);
1.1 markus 130: }
131:
132: /* More detailed messages (information that does not need to go to the log). */
133:
134: void
1.4 markus 135: verbose(const char *fmt,...)
1.1 markus 136: {
1.4 markus 137: va_list args;
138: va_start(args, fmt);
139: do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
140: va_end(args);
1.1 markus 141: }
142:
143: /* Debugging messages that should not be logged during normal operation. */
144:
145: void
1.4 markus 146: debug(const char *fmt,...)
1.1 markus 147: {
1.4 markus 148: va_list args;
149: va_start(args, fmt);
1.10 markus 150: do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
151: va_end(args);
152: }
153:
154: void
155: debug2(const char *fmt,...)
156: {
157: va_list args;
158: va_start(args, fmt);
159: do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
160: va_end(args);
161: }
162:
163: void
164: debug3(const char *fmt,...)
165: {
166: va_list args;
167: va_start(args, fmt);
168: do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
1.4 markus 169: va_end(args);
1.1 markus 170: }
171:
172: /* Fatal cleanup */
173:
1.4 markus 174: struct fatal_cleanup {
175: struct fatal_cleanup *next;
176: void (*proc) (void *);
177: void *context;
1.1 markus 178: };
179:
180: static struct fatal_cleanup *fatal_cleanups = NULL;
181:
182: /* Registers a cleanup function to be called by fatal() before exiting. */
183:
184: void
1.4 markus 185: fatal_add_cleanup(void (*proc) (void *), void *context)
1.1 markus 186: {
1.4 markus 187: struct fatal_cleanup *cu;
1.1 markus 188:
1.4 markus 189: cu = xmalloc(sizeof(*cu));
190: cu->proc = proc;
191: cu->context = context;
192: cu->next = fatal_cleanups;
193: fatal_cleanups = cu;
1.1 markus 194: }
195:
196: /* Removes a cleanup frunction to be called at fatal(). */
197:
198: void
1.4 markus 199: fatal_remove_cleanup(void (*proc) (void *context), void *context)
1.1 markus 200: {
1.4 markus 201: struct fatal_cleanup **cup, *cu;
202:
203: for (cup = &fatal_cleanups; *cup; cup = &cu->next) {
204: cu = *cup;
205: if (cu->proc == proc && cu->context == context) {
206: *cup = cu->next;
207: xfree(cu);
208: return;
209: }
1.1 markus 210: }
1.11.2.3 jason 211: fatal("fatal_remove_cleanup: no such cleanup function: 0x%lx 0x%lx",
212: (u_long) proc, (u_long) context);
1.1 markus 213: }
214:
215: /* Cleanup and exit */
216: void
217: fatal_cleanup(void)
218: {
1.4 markus 219: struct fatal_cleanup *cu, *next_cu;
220: static int called = 0;
1.1 markus 221:
1.4 markus 222: if (called)
223: exit(255);
224: called = 1;
225: /* Call cleanup functions. */
226: for (cu = fatal_cleanups; cu; cu = next_cu) {
227: next_cu = cu->next;
228: debug("Calling cleanup 0x%lx(0x%lx)",
1.11.2.6! brad 229: (u_long) cu->proc, (u_long) cu->context);
1.4 markus 230: (*cu->proc) (cu->context);
231: }
232: exit(255);
1.2 markus 233: }
234:
235:
1.11.2.3 jason 236: /*
237: * Initialize the log.
238: */
1.2 markus 239:
1.11.2.3 jason 240: void
241: log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
1.2 markus 242: {
1.11.2.3 jason 243: argv0 = av0;
1.2 markus 244:
1.11.2.3 jason 245: switch (level) {
246: case SYSLOG_LEVEL_QUIET:
247: case SYSLOG_LEVEL_FATAL:
248: case SYSLOG_LEVEL_ERROR:
249: case SYSLOG_LEVEL_INFO:
250: case SYSLOG_LEVEL_VERBOSE:
251: case SYSLOG_LEVEL_DEBUG1:
252: case SYSLOG_LEVEL_DEBUG2:
253: case SYSLOG_LEVEL_DEBUG3:
254: log_level = level;
255: break;
256: default:
257: fprintf(stderr, "Unrecognized internal syslog level code %d\n",
258: (int) level);
259: exit(1);
260: }
261:
262: log_on_stderr = on_stderr;
263: if (on_stderr)
264: return;
265:
266: switch (facility) {
267: case SYSLOG_FACILITY_DAEMON:
268: log_facility = LOG_DAEMON;
269: break;
270: case SYSLOG_FACILITY_USER:
271: log_facility = LOG_USER;
272: break;
273: case SYSLOG_FACILITY_AUTH:
274: log_facility = LOG_AUTH;
275: break;
276: case SYSLOG_FACILITY_LOCAL0:
277: log_facility = LOG_LOCAL0;
278: break;
279: case SYSLOG_FACILITY_LOCAL1:
280: log_facility = LOG_LOCAL1;
281: break;
282: case SYSLOG_FACILITY_LOCAL2:
283: log_facility = LOG_LOCAL2;
284: break;
285: case SYSLOG_FACILITY_LOCAL3:
286: log_facility = LOG_LOCAL3;
287: break;
288: case SYSLOG_FACILITY_LOCAL4:
289: log_facility = LOG_LOCAL4;
290: break;
291: case SYSLOG_FACILITY_LOCAL5:
292: log_facility = LOG_LOCAL5;
293: break;
294: case SYSLOG_FACILITY_LOCAL6:
295: log_facility = LOG_LOCAL6;
296: break;
297: case SYSLOG_FACILITY_LOCAL7:
298: log_facility = LOG_LOCAL7;
299: break;
300: default:
301: fprintf(stderr,
302: "Unrecognized internal syslog facility code %d\n",
303: (int) facility);
304: exit(1);
305: }
1.2 markus 306: }
307:
1.11.2.3 jason 308: #define MSGBUFSIZ 1024
309:
1.11.2.6! brad 310: void
1.11.2.3 jason 311: do_log(LogLevel level, const char *fmt, va_list args)
1.2 markus 312: {
1.11.2.3 jason 313: char msgbuf[MSGBUFSIZ];
314: char fmtbuf[MSGBUFSIZ];
315: char *txt = NULL;
316: int pri = LOG_INFO;
317:
318: if (level > log_level)
319: return;
320:
321: switch (level) {
322: case SYSLOG_LEVEL_FATAL:
323: if (!log_on_stderr)
324: txt = "fatal";
325: pri = LOG_CRIT;
326: break;
327: case SYSLOG_LEVEL_ERROR:
328: if (!log_on_stderr)
329: txt = "error";
330: pri = LOG_ERR;
331: break;
332: case SYSLOG_LEVEL_INFO:
333: pri = LOG_INFO;
334: break;
335: case SYSLOG_LEVEL_VERBOSE:
336: pri = LOG_INFO;
337: break;
338: case SYSLOG_LEVEL_DEBUG1:
339: txt = "debug1";
340: pri = LOG_DEBUG;
341: break;
342: case SYSLOG_LEVEL_DEBUG2:
343: txt = "debug2";
344: pri = LOG_DEBUG;
345: break;
346: case SYSLOG_LEVEL_DEBUG3:
347: txt = "debug3";
348: pri = LOG_DEBUG;
349: break;
350: default:
351: txt = "internal error";
352: pri = LOG_ERR;
353: break;
354: }
355: if (txt != NULL) {
356: snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
357: vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
358: } else {
359: vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
360: }
361: if (log_on_stderr) {
362: fprintf(stderr, "%s\r\n", msgbuf);
363: } else {
364: openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
365: syslog(pri, "%.500s", msgbuf);
366: closelog();
367: }
1.1 markus 368: }
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