Annotation of src/usr.bin/ssh/log.c, Revision 1.9
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: /*
1.5 deraadt 13: * Shared versions of debug(), log(), etc.
1.8 deraadt 14: *
15: * Copyright (c) 2000 Markus Friedl. All rights reserved.
16: *
17: * Redistribution and use in source and binary forms, with or without
18: * modification, are permitted provided that the following conditions
19: * are met:
20: * 1. Redistributions of source code must retain the above copyright
21: * notice, this list of conditions and the following disclaimer.
22: * 2. Redistributions in binary form must reproduce the above copyright
23: * notice, this list of conditions and the following disclaimer in the
24: * documentation and/or other materials provided with the distribution.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
27: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
28: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
30: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.6 markus 36: */
1.1 markus 37:
38: #include "includes.h"
1.9 ! markus 39: RCSID("$OpenBSD: log.c,v 1.8 2000/09/07 20:27:52 deraadt Exp $");
1.1 markus 40:
41: #include "ssh.h"
42: #include "xmalloc.h"
43:
44: /* Fatal messages. This function never returns. */
45:
46: void
1.4 markus 47: fatal(const char *fmt,...)
1.1 markus 48: {
1.4 markus 49: va_list args;
50: va_start(args, fmt);
51: do_log(SYSLOG_LEVEL_FATAL, fmt, args);
52: va_end(args);
53: fatal_cleanup();
1.1 markus 54: }
55:
56: /* Error messages that should be logged. */
57:
58: void
1.4 markus 59: error(const char *fmt,...)
1.1 markus 60: {
1.4 markus 61: va_list args;
62: va_start(args, fmt);
63: do_log(SYSLOG_LEVEL_ERROR, fmt, args);
64: va_end(args);
1.1 markus 65: }
66:
67: /* Log this message (information that usually should go to the log). */
68:
69: void
1.4 markus 70: log(const char *fmt,...)
1.1 markus 71: {
1.4 markus 72: va_list args;
73: va_start(args, fmt);
74: do_log(SYSLOG_LEVEL_INFO, fmt, args);
75: va_end(args);
1.1 markus 76: }
77:
78: /* More detailed messages (information that does not need to go to the log). */
79:
80: void
1.4 markus 81: verbose(const char *fmt,...)
1.1 markus 82: {
1.4 markus 83: va_list args;
84: va_start(args, fmt);
85: do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
86: va_end(args);
1.1 markus 87: }
88:
89: /* Debugging messages that should not be logged during normal operation. */
90:
91: void
1.4 markus 92: debug(const char *fmt,...)
1.1 markus 93: {
1.4 markus 94: va_list args;
95: va_start(args, fmt);
96: do_log(SYSLOG_LEVEL_DEBUG, fmt, args);
97: va_end(args);
1.1 markus 98: }
99:
100: /* Fatal cleanup */
101:
1.4 markus 102: struct fatal_cleanup {
103: struct fatal_cleanup *next;
104: void (*proc) (void *);
105: void *context;
1.1 markus 106: };
107:
108: static struct fatal_cleanup *fatal_cleanups = NULL;
109:
110: /* Registers a cleanup function to be called by fatal() before exiting. */
111:
112: void
1.4 markus 113: fatal_add_cleanup(void (*proc) (void *), void *context)
1.1 markus 114: {
1.4 markus 115: struct fatal_cleanup *cu;
1.1 markus 116:
1.4 markus 117: cu = xmalloc(sizeof(*cu));
118: cu->proc = proc;
119: cu->context = context;
120: cu->next = fatal_cleanups;
121: fatal_cleanups = cu;
1.1 markus 122: }
123:
124: /* Removes a cleanup frunction to be called at fatal(). */
125:
126: void
1.4 markus 127: fatal_remove_cleanup(void (*proc) (void *context), void *context)
1.1 markus 128: {
1.4 markus 129: struct fatal_cleanup **cup, *cu;
130:
131: for (cup = &fatal_cleanups; *cup; cup = &cu->next) {
132: cu = *cup;
133: if (cu->proc == proc && cu->context == context) {
134: *cup = cu->next;
135: xfree(cu);
136: return;
137: }
1.1 markus 138: }
1.4 markus 139: fatal("fatal_remove_cleanup: no such cleanup function: 0x%lx 0x%lx\n",
140: (unsigned long) proc, (unsigned long) context);
1.1 markus 141: }
142:
143: /* Cleanup and exit */
144: void
145: fatal_cleanup(void)
146: {
1.4 markus 147: struct fatal_cleanup *cu, *next_cu;
148: static int called = 0;
1.1 markus 149:
1.4 markus 150: if (called)
151: exit(255);
152: called = 1;
153: /* Call cleanup functions. */
154: for (cu = fatal_cleanups; cu; cu = next_cu) {
155: next_cu = cu->next;
156: debug("Calling cleanup 0x%lx(0x%lx)",
157: (unsigned long) cu->proc, (unsigned long) cu->context);
158: (*cu->proc) (cu->context);
159: }
160: exit(255);
1.2 markus 161: }
162:
163: /* textual representation of log-facilities/levels */
164:
1.4 markus 165: static struct {
166: const char *name;
167: SyslogFacility val;
168: } log_facilities[] = {
169: { "DAEMON", SYSLOG_FACILITY_DAEMON },
170: { "USER", SYSLOG_FACILITY_USER },
171: { "AUTH", SYSLOG_FACILITY_AUTH },
172: { "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
173: { "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
174: { "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
175: { "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
176: { "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
177: { "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
178: { "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
179: { "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
180: { NULL, 0 }
1.2 markus 181: };
182:
1.4 markus 183: static struct {
184: const char *name;
185: LogLevel val;
1.2 markus 186: } log_levels[] =
187: {
1.4 markus 188: { "QUIET", SYSLOG_LEVEL_QUIET },
189: { "FATAL", SYSLOG_LEVEL_FATAL },
190: { "ERROR", SYSLOG_LEVEL_ERROR },
191: { "INFO", SYSLOG_LEVEL_INFO },
192: { "VERBOSE", SYSLOG_LEVEL_VERBOSE },
193: { "DEBUG", SYSLOG_LEVEL_DEBUG },
194: { NULL, 0 }
1.2 markus 195: };
196:
197: SyslogFacility
198: log_facility_number(char *name)
199: {
1.4 markus 200: int i;
201: if (name != NULL)
202: for (i = 0; log_facilities[i].name; i++)
203: if (strcasecmp(log_facilities[i].name, name) == 0)
204: return log_facilities[i].val;
205: return (SyslogFacility) - 1;
1.2 markus 206: }
207:
208: LogLevel
209: log_level_number(char *name)
210: {
1.4 markus 211: int i;
212: if (name != NULL)
213: for (i = 0; log_levels[i].name; i++)
214: if (strcasecmp(log_levels[i].name, name) == 0)
215: return log_levels[i].val;
216: return (LogLevel) - 1;
1.1 markus 217: }
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