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1 | /* | |
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 | * Server-side versions of debug(), log(), etc. These normally send the output | |
6 | * to the system log. | |
7 | * | |
8 | * As far as I am concerned, the code I have written for this software | |
9 | * can be used freely for any purpose. Any derived versions of this | |
10 | * software must be clearly marked as such, and if the derived work is | |
11 | * incompatible with the protocol description in the RFC file, it must be | |
12 | * called by a name other than "ssh" or "Secure Shell". | |
13 | * | |
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. | |
36 | */ | |
37 | ||
38 | #include "includes.h" | |
39 | RCSID("$OpenBSD: log-server.c,v 1.20 2001/01/21 19:05:50 markus Exp $"); | |
40 | ||
41 | #include <syslog.h> | |
42 | #include "packet.h" | |
43 | #include "xmalloc.h" | |
44 | #include "log.h" | |
45 | ||
46 | static LogLevel log_level = SYSLOG_LEVEL_INFO; | |
47 | static int log_on_stderr = 0; | |
48 | static int log_facility = LOG_AUTH; | |
49 | ||
50 | /* Initialize the log. | |
51 | * av0 program name (should be argv[0]) | |
52 | * on_stderr print also on stderr | |
53 | * level logging level | |
54 | */ | |
55 | ||
56 | void | |
57 | log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr) | |
58 | { | |
59 | switch (level) { | |
60 | case SYSLOG_LEVEL_QUIET: | |
61 | case SYSLOG_LEVEL_FATAL: | |
62 | case SYSLOG_LEVEL_ERROR: | |
63 | case SYSLOG_LEVEL_INFO: | |
64 | case SYSLOG_LEVEL_VERBOSE: | |
65 | case SYSLOG_LEVEL_DEBUG1: | |
66 | case SYSLOG_LEVEL_DEBUG2: | |
67 | case SYSLOG_LEVEL_DEBUG3: | |
68 | log_level = level; | |
69 | break; | |
70 | default: | |
71 | fprintf(stderr, "Unrecognized internal syslog level code %d\n", | |
72 | (int) level); | |
73 | exit(1); | |
74 | } | |
75 | switch (facility) { | |
76 | case SYSLOG_FACILITY_DAEMON: | |
77 | log_facility = LOG_DAEMON; | |
78 | break; | |
79 | case SYSLOG_FACILITY_USER: | |
80 | log_facility = LOG_USER; | |
81 | break; | |
82 | case SYSLOG_FACILITY_AUTH: | |
83 | log_facility = LOG_AUTH; | |
84 | break; | |
85 | #ifdef LOG_AUTHPRIV | |
86 | case SYSLOG_FACILITY_AUTHPRIV: | |
87 | log_facility = LOG_AUTHPRIV; | |
88 | break; | |
89 | #endif | |
90 | case SYSLOG_FACILITY_LOCAL0: | |
91 | log_facility = LOG_LOCAL0; | |
92 | break; | |
93 | case SYSLOG_FACILITY_LOCAL1: | |
94 | log_facility = LOG_LOCAL1; | |
95 | break; | |
96 | case SYSLOG_FACILITY_LOCAL2: | |
97 | log_facility = LOG_LOCAL2; | |
98 | break; | |
99 | case SYSLOG_FACILITY_LOCAL3: | |
100 | log_facility = LOG_LOCAL3; | |
101 | break; | |
102 | case SYSLOG_FACILITY_LOCAL4: | |
103 | log_facility = LOG_LOCAL4; | |
104 | break; | |
105 | case SYSLOG_FACILITY_LOCAL5: | |
106 | log_facility = LOG_LOCAL5; | |
107 | break; | |
108 | case SYSLOG_FACILITY_LOCAL6: | |
109 | log_facility = LOG_LOCAL6; | |
110 | break; | |
111 | case SYSLOG_FACILITY_LOCAL7: | |
112 | log_facility = LOG_LOCAL7; | |
113 | break; | |
114 | default: | |
115 | fprintf(stderr, "Unrecognized internal syslog facility code %d\n", | |
116 | (int) facility); | |
117 | exit(1); | |
118 | } | |
119 | log_on_stderr = on_stderr; | |
120 | } | |
121 | ||
122 | #define MSGBUFSIZ 1024 | |
123 | ||
124 | void | |
125 | do_log(LogLevel level, const char *fmt, va_list args) | |
126 | { | |
127 | char msgbuf[MSGBUFSIZ]; | |
128 | char fmtbuf[MSGBUFSIZ]; | |
129 | char *txt = NULL; | |
130 | int pri = LOG_INFO; | |
131 | extern char *__progname; | |
132 | ||
133 | if (level > log_level) | |
134 | return; | |
135 | switch (level) { | |
136 | case SYSLOG_LEVEL_FATAL: | |
137 | txt = "fatal"; | |
138 | pri = LOG_CRIT; | |
139 | break; | |
140 | case SYSLOG_LEVEL_ERROR: | |
141 | txt = "error"; | |
142 | pri = LOG_ERR; | |
143 | break; | |
144 | case SYSLOG_LEVEL_INFO: | |
145 | pri = LOG_INFO; | |
146 | break; | |
147 | case SYSLOG_LEVEL_VERBOSE: | |
148 | pri = LOG_INFO; | |
149 | break; | |
150 | case SYSLOG_LEVEL_DEBUG1: | |
151 | txt = "debug1"; | |
152 | pri = LOG_DEBUG; | |
153 | break; | |
154 | case SYSLOG_LEVEL_DEBUG2: | |
155 | txt = "debug2"; | |
156 | pri = LOG_DEBUG; | |
157 | break; | |
158 | case SYSLOG_LEVEL_DEBUG3: | |
159 | txt = "debug3"; | |
160 | pri = LOG_DEBUG; | |
161 | break; | |
162 | default: | |
163 | txt = "internal error"; | |
164 | pri = LOG_ERR; | |
165 | break; | |
166 | } | |
167 | if (txt != NULL) { | |
168 | snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt); | |
169 | vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args); | |
170 | } else { | |
171 | vsnprintf(msgbuf, sizeof(msgbuf), fmt, args); | |
172 | } | |
173 | if (log_on_stderr) { | |
174 | fprintf(stderr, "%s\n", msgbuf); | |
175 | } else { | |
176 | openlog(__progname, LOG_PID, log_facility); | |
177 | syslog(pri, "%.500s", msgbuf); | |
178 | closelog(); | |
179 | } | |
180 | } |