Annotation of src/usr.bin/ssh/log.c, Revision 1.24.2.2
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"
1.24.2.2! brad 37: RCSID("$OpenBSD: log.c,v 1.28 2003/05/24 09:02:22 djm Exp $");
1.1 markus 38:
1.15 markus 39: #include "log.h"
1.1 markus 40: #include "xmalloc.h"
41:
1.16 markus 42: #include <syslog.h>
1.24.2.2! brad 43: #include <vis.h>
1.16 markus 44:
45: static LogLevel log_level = SYSLOG_LEVEL_INFO;
46: static int log_on_stderr = 1;
47: static int log_facility = LOG_AUTH;
48: static char *argv0;
49:
50: extern char *__progname;
51:
52: /* textual representation of log-facilities/levels */
53:
54: static struct {
55: const char *name;
56: SyslogFacility val;
57: } log_facilities[] = {
58: { "DAEMON", SYSLOG_FACILITY_DAEMON },
59: { "USER", SYSLOG_FACILITY_USER },
60: { "AUTH", SYSLOG_FACILITY_AUTH },
61: { "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
62: { "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
63: { "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
64: { "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
65: { "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
66: { "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
67: { "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
68: { "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
1.21 markus 69: { NULL, SYSLOG_FACILITY_NOT_SET }
1.16 markus 70: };
71:
72: static struct {
73: const char *name;
74: LogLevel val;
75: } log_levels[] =
76: {
77: { "QUIET", SYSLOG_LEVEL_QUIET },
78: { "FATAL", SYSLOG_LEVEL_FATAL },
79: { "ERROR", SYSLOG_LEVEL_ERROR },
80: { "INFO", SYSLOG_LEVEL_INFO },
81: { "VERBOSE", SYSLOG_LEVEL_VERBOSE },
82: { "DEBUG", SYSLOG_LEVEL_DEBUG1 },
83: { "DEBUG1", SYSLOG_LEVEL_DEBUG1 },
84: { "DEBUG2", SYSLOG_LEVEL_DEBUG2 },
85: { "DEBUG3", SYSLOG_LEVEL_DEBUG3 },
1.21 markus 86: { NULL, SYSLOG_LEVEL_NOT_SET }
1.16 markus 87: };
88:
89: SyslogFacility
90: log_facility_number(char *name)
91: {
92: int i;
1.23 deraadt 93:
1.16 markus 94: if (name != NULL)
95: for (i = 0; log_facilities[i].name; i++)
96: if (strcasecmp(log_facilities[i].name, name) == 0)
97: return log_facilities[i].val;
1.21 markus 98: return SYSLOG_FACILITY_NOT_SET;
1.16 markus 99: }
100:
101: LogLevel
102: log_level_number(char *name)
103: {
104: int i;
1.23 deraadt 105:
1.16 markus 106: if (name != NULL)
107: for (i = 0; log_levels[i].name; i++)
108: if (strcasecmp(log_levels[i].name, name) == 0)
109: return log_levels[i].val;
1.21 markus 110: return SYSLOG_LEVEL_NOT_SET;
1.16 markus 111: }
1.1 markus 112:
113: /* Error messages that should be logged. */
114:
115: void
1.4 markus 116: error(const char *fmt,...)
1.1 markus 117: {
1.4 markus 118: va_list args;
1.23 deraadt 119:
1.4 markus 120: va_start(args, fmt);
121: do_log(SYSLOG_LEVEL_ERROR, fmt, args);
122: va_end(args);
1.1 markus 123: }
124:
125: /* Log this message (information that usually should go to the log). */
126:
127: void
1.24.2.2! brad 128: logit(const char *fmt,...)
1.1 markus 129: {
1.4 markus 130: va_list args;
1.23 deraadt 131:
1.4 markus 132: va_start(args, fmt);
1.14 markus 133: do_log(SYSLOG_LEVEL_INFO, fmt, args);
1.4 markus 134: va_end(args);
1.1 markus 135: }
136:
137: /* More detailed messages (information that does not need to go to the log). */
138:
139: void
1.4 markus 140: verbose(const char *fmt,...)
1.1 markus 141: {
1.4 markus 142: va_list args;
1.23 deraadt 143:
1.4 markus 144: va_start(args, fmt);
145: do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
146: va_end(args);
1.1 markus 147: }
148:
149: /* Debugging messages that should not be logged during normal operation. */
150:
151: void
1.4 markus 152: debug(const char *fmt,...)
1.1 markus 153: {
1.4 markus 154: va_list args;
1.23 deraadt 155:
1.4 markus 156: va_start(args, fmt);
1.10 markus 157: do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
158: va_end(args);
159: }
160:
161: void
162: debug2(const char *fmt,...)
163: {
164: va_list args;
1.23 deraadt 165:
1.10 markus 166: va_start(args, fmt);
167: do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
168: va_end(args);
169: }
170:
171: void
172: debug3(const char *fmt,...)
173: {
174: va_list args;
1.23 deraadt 175:
1.10 markus 176: va_start(args, fmt);
177: do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
1.4 markus 178: va_end(args);
1.1 markus 179: }
180:
181: /* Fatal cleanup */
182:
1.4 markus 183: struct fatal_cleanup {
184: struct fatal_cleanup *next;
185: void (*proc) (void *);
186: void *context;
1.1 markus 187: };
188:
189: static struct fatal_cleanup *fatal_cleanups = NULL;
190:
191: /* Registers a cleanup function to be called by fatal() before exiting. */
192:
193: void
1.4 markus 194: fatal_add_cleanup(void (*proc) (void *), void *context)
1.1 markus 195: {
1.4 markus 196: struct fatal_cleanup *cu;
1.1 markus 197:
1.4 markus 198: cu = xmalloc(sizeof(*cu));
199: cu->proc = proc;
200: cu->context = context;
201: cu->next = fatal_cleanups;
202: fatal_cleanups = cu;
1.1 markus 203: }
204:
205: /* Removes a cleanup frunction to be called at fatal(). */
206:
207: void
1.4 markus 208: fatal_remove_cleanup(void (*proc) (void *context), void *context)
1.1 markus 209: {
1.4 markus 210: struct fatal_cleanup **cup, *cu;
211:
212: for (cup = &fatal_cleanups; *cup; cup = &cu->next) {
213: cu = *cup;
214: if (cu->proc == proc && cu->context == context) {
215: *cup = cu->next;
216: xfree(cu);
217: return;
218: }
1.1 markus 219: }
1.17 millert 220: fatal("fatal_remove_cleanup: no such cleanup function: 0x%lx 0x%lx",
1.16 markus 221: (u_long) proc, (u_long) context);
1.24 markus 222: }
223:
224: /* Remove all cleanups, to be called after fork() */
225: void
226: fatal_remove_all_cleanups(void)
227: {
228: struct fatal_cleanup *cu, *next_cu;
229:
230: for (cu = fatal_cleanups; cu; cu = next_cu) {
231: next_cu = cu->next;
232: xfree(cu);
233: }
1.24.2.1 margarid 234: fatal_cleanups = NULL;
1.1 markus 235: }
236:
237: /* Cleanup and exit */
238: void
239: fatal_cleanup(void)
240: {
1.4 markus 241: struct fatal_cleanup *cu, *next_cu;
242: static int called = 0;
1.1 markus 243:
1.4 markus 244: if (called)
245: exit(255);
246: called = 1;
247: /* Call cleanup functions. */
248: for (cu = fatal_cleanups; cu; cu = next_cu) {
249: next_cu = cu->next;
250: debug("Calling cleanup 0x%lx(0x%lx)",
1.19 deraadt 251: (u_long) cu->proc, (u_long) cu->context);
1.4 markus 252: (*cu->proc) (cu->context);
253: }
254: exit(255);
1.2 markus 255: }
256:
257:
1.16 markus 258: /*
259: * Initialize the log.
260: */
1.2 markus 261:
1.16 markus 262: void
263: log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
1.2 markus 264: {
1.16 markus 265: argv0 = av0;
266:
267: switch (level) {
268: case SYSLOG_LEVEL_QUIET:
269: case SYSLOG_LEVEL_FATAL:
270: case SYSLOG_LEVEL_ERROR:
271: case SYSLOG_LEVEL_INFO:
272: case SYSLOG_LEVEL_VERBOSE:
273: case SYSLOG_LEVEL_DEBUG1:
274: case SYSLOG_LEVEL_DEBUG2:
275: case SYSLOG_LEVEL_DEBUG3:
276: log_level = level;
277: break;
278: default:
279: fprintf(stderr, "Unrecognized internal syslog level code %d\n",
280: (int) level);
281: exit(1);
282: }
1.2 markus 283:
1.16 markus 284: log_on_stderr = on_stderr;
285: if (on_stderr)
286: return;
287:
288: switch (facility) {
289: case SYSLOG_FACILITY_DAEMON:
290: log_facility = LOG_DAEMON;
291: break;
292: case SYSLOG_FACILITY_USER:
293: log_facility = LOG_USER;
294: break;
295: case SYSLOG_FACILITY_AUTH:
296: log_facility = LOG_AUTH;
297: break;
298: case SYSLOG_FACILITY_LOCAL0:
299: log_facility = LOG_LOCAL0;
300: break;
301: case SYSLOG_FACILITY_LOCAL1:
302: log_facility = LOG_LOCAL1;
303: break;
304: case SYSLOG_FACILITY_LOCAL2:
305: log_facility = LOG_LOCAL2;
306: break;
307: case SYSLOG_FACILITY_LOCAL3:
308: log_facility = LOG_LOCAL3;
309: break;
310: case SYSLOG_FACILITY_LOCAL4:
311: log_facility = LOG_LOCAL4;
312: break;
313: case SYSLOG_FACILITY_LOCAL5:
314: log_facility = LOG_LOCAL5;
315: break;
316: case SYSLOG_FACILITY_LOCAL6:
317: log_facility = LOG_LOCAL6;
318: break;
319: case SYSLOG_FACILITY_LOCAL7:
320: log_facility = LOG_LOCAL7;
321: break;
322: default:
323: fprintf(stderr,
324: "Unrecognized internal syslog facility code %d\n",
325: (int) facility);
326: exit(1);
327: }
1.2 markus 328: }
329:
1.16 markus 330: #define MSGBUFSIZ 1024
331:
1.22 markus 332: void
1.16 markus 333: do_log(LogLevel level, const char *fmt, va_list args)
1.2 markus 334: {
1.24.2.2! brad 335: struct syslog_data sdata = SYSLOG_DATA_INIT;
1.16 markus 336: char msgbuf[MSGBUFSIZ];
337: char fmtbuf[MSGBUFSIZ];
338: char *txt = NULL;
339: int pri = LOG_INFO;
340:
341: if (level > log_level)
342: return;
343:
344: switch (level) {
345: case SYSLOG_LEVEL_FATAL:
346: if (!log_on_stderr)
347: txt = "fatal";
348: pri = LOG_CRIT;
349: break;
350: case SYSLOG_LEVEL_ERROR:
351: if (!log_on_stderr)
352: txt = "error";
353: pri = LOG_ERR;
354: break;
355: case SYSLOG_LEVEL_INFO:
356: pri = LOG_INFO;
357: break;
358: case SYSLOG_LEVEL_VERBOSE:
359: pri = LOG_INFO;
360: break;
361: case SYSLOG_LEVEL_DEBUG1:
362: txt = "debug1";
363: pri = LOG_DEBUG;
364: break;
365: case SYSLOG_LEVEL_DEBUG2:
366: txt = "debug2";
367: pri = LOG_DEBUG;
368: break;
369: case SYSLOG_LEVEL_DEBUG3:
370: txt = "debug3";
371: pri = LOG_DEBUG;
372: break;
373: default:
374: txt = "internal error";
375: pri = LOG_ERR;
376: break;
377: }
378: if (txt != NULL) {
379: snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
380: vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
381: } else {
382: vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
383: }
1.24.2.2! brad 384: strnvis(fmtbuf, msgbuf, sizeof(fmtbuf), VIS_SAFE|VIS_OCTAL);
1.16 markus 385: if (log_on_stderr) {
1.24.2.2! brad 386: snprintf(msgbuf, sizeof msgbuf, "%s\r\n", fmtbuf);
! 387: write(STDERR_FILENO, msgbuf, strlen(msgbuf));
1.16 markus 388: } else {
1.24.2.2! brad 389: openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
! 390: syslog_r(pri, &sdata, "%.500s", fmtbuf);
! 391: closelog_r(&sdata);
1.16 markus 392: }
1.1 markus 393: }
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