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4b292b55 | 1 | /* -*- mode: c; c-file-style: "openbsd" -*- */ |
43c02e7b VB |
2 | /* $OpenBSD: log.c,v 1.11 2007/12/07 17:17:00 reyk Exp $ */ |
3 | ||
4 | /* | |
5 | * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org> | |
6 | * | |
51434125 | 7 | * Permission to use, copy, modify, and/or distribute this software for any |
43c02e7b VB |
8 | * purpose with or without fee is hereby granted, provided that the above |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER | |
16 | * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING | |
17 | * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
18 | */ | |
19 | ||
c9429a42 | 20 | #include <unistd.h> |
43c02e7b | 21 | #include <stdio.h> |
4b292b55 VB |
22 | #include <stdlib.h> |
23 | #include <stdarg.h> | |
43c02e7b | 24 | #include <syslog.h> |
4b292b55 VB |
25 | #include <sys/types.h> |
26 | #include <string.h> | |
27 | #include <errno.h> | |
43c02e7b VB |
28 | #include <time.h> |
29 | ||
4b292b55 | 30 | /* By default, logging is done on stderr. */ |
9856f279 VB |
31 | static int use_syslog = 0; |
32 | /* Default debug level */ | |
33 | static int debug = 0; | |
4b292b55 VB |
34 | |
35 | /* Logging can be modified by providing an appropriate log handler. */ | |
36 | static void (*logh)(int severity, const char *msg) = NULL; | |
43c02e7b | 37 | |
26fa5d17 | 38 | static void vlog(int, const char *, const char *, va_list); |
6f8925be | 39 | static void logit(int, const char *, const char *, ...); |
43c02e7b | 40 | |
9e5d99d4 | 41 | #define MAX_DBG_TOKENS 40 |
dcf5d2f7 | 42 | static const char *tokens[MAX_DBG_TOKENS + 1] = {NULL}; |
9e5d99d4 | 43 | |
43c02e7b | 44 | void |
9856f279 | 45 | log_init(int n_syslog, int n_debug, const char *progname) |
43c02e7b | 46 | { |
9856f279 | 47 | use_syslog = n_syslog; |
43c02e7b VB |
48 | debug = n_debug; |
49 | ||
9856f279 | 50 | if (use_syslog) |
6bb9c4e0 | 51 | openlog(progname, LOG_PID | LOG_NDELAY, LOG_DAEMON); |
43c02e7b VB |
52 | |
53 | tzset(); | |
54 | } | |
55 | ||
2389d2cc VB |
56 | void |
57 | log_level(int n_debug) | |
58 | { | |
9856f279 | 59 | if (n_debug >= 0) |
2389d2cc VB |
60 | debug = n_debug; |
61 | } | |
62 | ||
4b292b55 VB |
63 | void |
64 | log_register(void (*cb)(int, const char*)) | |
65 | { | |
66 | logh = cb; | |
67 | } | |
68 | ||
9e5d99d4 VB |
69 | void |
70 | log_accept(const char *token) | |
71 | { | |
72 | int i; | |
73 | for (i = 0; i < MAX_DBG_TOKENS; i++) { | |
74 | if (tokens[i] == NULL) { | |
75 | tokens[i+1] = NULL; | |
76 | tokens[i] = token; | |
77 | return; | |
78 | } | |
79 | } | |
80 | } | |
4b292b55 | 81 | |
8888d191 | 82 | static void |
6f8925be | 83 | logit(int pri, const char *token, const char *fmt, ...) |
43c02e7b VB |
84 | { |
85 | va_list ap; | |
86 | ||
87 | va_start(ap, fmt); | |
6f8925be | 88 | vlog(pri, token, fmt, ap); |
43c02e7b VB |
89 | va_end(ap); |
90 | } | |
91 | ||
c9429a42 VB |
92 | static char * |
93 | date() | |
94 | { | |
95 | /* Return the current date as incomplete ISO 8601 (2012-12-12T16:13:30) */ | |
96 | static char date[] = "2012-12-12T16:13:30"; | |
97 | time_t t = time(NULL); | |
98 | struct tm *tmp = localtime(&t); | |
99 | strftime(date, sizeof(date), "%Y-%m-%dT%H:%M:%S", tmp); | |
100 | return date; | |
101 | } | |
102 | ||
103 | static const char * | |
104 | translate(int fd, int priority) | |
105 | { | |
106 | /* Translate a syslog priority to a string. With colors if the output is a terminal. */ | |
107 | int tty = isatty(fd); | |
108 | switch (tty) { | |
109 | case 1: | |
110 | switch (priority) { | |
26fa5d17 VB |
111 | case LOG_EMERG: return "\033[1;37;41m[EMRG"; |
112 | case LOG_ALERT: return "\033[1;37;41m[ALRT"; | |
113 | case LOG_CRIT: return "\033[1;37;41m[CRIT"; | |
114 | case LOG_ERR: return "\033[1;31m[ ERR"; | |
115 | case LOG_WARNING: return "\033[1;33m[WARN"; | |
116 | case LOG_NOTICE: return "\033[1;34m[NOTI"; | |
117 | case LOG_INFO: return "\033[1;34m[INFO"; | |
5c969283 | 118 | case LOG_DEBUG: return "\033[36m[ DBG"; |
c9429a42 VB |
119 | } |
120 | break; | |
121 | default: | |
122 | switch (priority) { | |
26fa5d17 VB |
123 | case LOG_EMERG: return "[EMRG"; |
124 | case LOG_ALERT: return "[ALRT"; | |
125 | case LOG_CRIT: return "[CRIT"; | |
126 | case LOG_ERR: return "[ ERR"; | |
127 | case LOG_WARNING: return "[WARN"; | |
128 | case LOG_NOTICE: return "[NOTI"; | |
129 | case LOG_INFO: return "[INFO"; | |
130 | case LOG_DEBUG: return "[ DBG"; | |
c9429a42 VB |
131 | } |
132 | } | |
133 | return "[UNKN]"; | |
134 | } | |
135 | ||
8888d191 | 136 | static void |
26fa5d17 | 137 | vlog(int pri, const char *token, const char *fmt, va_list ap) |
43c02e7b | 138 | { |
4b292b55 VB |
139 | if (logh) { |
140 | char *result; | |
141 | if (vasprintf(&result, fmt, ap) != -1) { | |
142 | logh(pri, result); | |
bea70314 | 143 | free(result); |
4b292b55 VB |
144 | return; |
145 | } | |
5aae2522 VB |
146 | /* Otherwise, abort. We don't know if "ap" is still OK. We could |
147 | * have made a copy, but this is too much overhead for a | |
148 | * situation that shouldn't happen. */ | |
149 | return; | |
150 | } | |
151 | ||
ae8e632a VB |
152 | /* Log to syslog if requested */ |
153 | if (use_syslog) { | |
154 | va_list ap2; | |
155 | va_copy(ap2, ap); | |
156 | vsyslog(pri, fmt, ap2); | |
157 | va_end(ap2); | |
4b292b55 | 158 | } |
b5463687 VB |
159 | |
160 | /* Log to standard error in all cases */ | |
161 | char *nfmt; | |
162 | /* best effort in out of mem situations */ | |
163 | if (asprintf(&nfmt, "%s %s%s%s]%s %s\n", | |
164 | date(), | |
165 | translate(STDERR_FILENO, pri), | |
166 | token ? "/" : "", token ? token : "", | |
167 | isatty(STDERR_FILENO) ? "\033[0m" : "", | |
168 | fmt) == -1) { | |
169 | vfprintf(stderr, fmt, ap); | |
170 | fprintf(stderr, "\n"); | |
171 | } else { | |
172 | vfprintf(stderr, nfmt, ap); | |
173 | free(nfmt); | |
174 | } | |
175 | fflush(stderr); | |
43c02e7b VB |
176 | } |
177 | ||
178 | ||
179 | void | |
26fa5d17 | 180 | log_warn(const char *token, const char *emsg, ...) |
43c02e7b VB |
181 | { |
182 | char *nfmt; | |
183 | va_list ap; | |
184 | ||
185 | /* best effort to even work in out of memory situations */ | |
186 | if (emsg == NULL) | |
c9429a42 | 187 | logit(LOG_WARNING, "%s", strerror(errno)); |
43c02e7b VB |
188 | else { |
189 | va_start(ap, emsg); | |
190 | ||
191 | if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) { | |
192 | /* we tried it... */ | |
26fa5d17 | 193 | vlog(LOG_WARNING, token, emsg, ap); |
c9429a42 | 194 | logit(LOG_WARNING, "%s", strerror(errno)); |
43c02e7b | 195 | } else { |
26fa5d17 | 196 | vlog(LOG_WARNING, token, nfmt, ap); |
43c02e7b VB |
197 | free(nfmt); |
198 | } | |
199 | va_end(ap); | |
200 | } | |
201 | } | |
202 | ||
203 | void | |
26fa5d17 | 204 | log_warnx(const char *token, const char *emsg, ...) |
43c02e7b VB |
205 | { |
206 | va_list ap; | |
207 | ||
208 | va_start(ap, emsg); | |
26fa5d17 | 209 | vlog(LOG_WARNING, token, emsg, ap); |
43c02e7b VB |
210 | va_end(ap); |
211 | } | |
212 | ||
213 | void | |
26fa5d17 | 214 | log_info(const char *token, const char *emsg, ...) |
43c02e7b VB |
215 | { |
216 | va_list ap; | |
217 | ||
9856f279 | 218 | if (use_syslog || debug > 0 || logh) { |
e595efb4 VB |
219 | va_start(ap, emsg); |
220 | vlog(LOG_INFO, token, emsg, ap); | |
221 | va_end(ap); | |
222 | } | |
43c02e7b VB |
223 | } |
224 | ||
9e5d99d4 VB |
225 | static int |
226 | log_debug_accept_token(const char *token) | |
227 | { | |
228 | int i; | |
229 | if (tokens[0] == NULL) return 1; | |
230 | for (i = 0; | |
231 | (i < MAX_DBG_TOKENS) && (tokens[i] != NULL); | |
232 | i++) { | |
233 | if (!strcmp(tokens[i], token)) | |
234 | return 1; | |
235 | } | |
236 | return 0; | |
237 | } | |
238 | ||
43c02e7b | 239 | void |
26fa5d17 | 240 | log_debug(const char *token, const char *emsg, ...) |
43c02e7b VB |
241 | { |
242 | va_list ap; | |
243 | ||
9856f279 | 244 | if ((debug > 1 && log_debug_accept_token(token)) || logh) { |
43c02e7b | 245 | va_start(ap, emsg); |
26fa5d17 | 246 | vlog(LOG_DEBUG, token, emsg, ap); |
43c02e7b VB |
247 | va_end(ap); |
248 | } | |
249 | } | |
250 | ||
251 | void | |
6f8925be | 252 | fatal(const char *token, const char *emsg) |
43c02e7b VB |
253 | { |
254 | if (emsg == NULL) | |
6f8925be | 255 | logit(LOG_CRIT, token ? token : "fatal", "%s", strerror(errno)); |
43c02e7b VB |
256 | else |
257 | if (errno) | |
6f8925be | 258 | logit(LOG_CRIT, token ? token : "fatal", "%s: %s", |
43c02e7b VB |
259 | emsg, strerror(errno)); |
260 | else | |
6f8925be | 261 | logit(LOG_CRIT, token ? token : "fatal", "%s", emsg); |
43c02e7b VB |
262 | |
263 | exit(1); | |
264 | } | |
265 | ||
266 | void | |
a87db231 | 267 | fatalx(const char *token, const char *emsg) |
43c02e7b VB |
268 | { |
269 | errno = 0; | |
a87db231 | 270 | fatal(token, emsg); |
43c02e7b | 271 | } |