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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 VB |
30 | /* By default, logging is done on stderr. */ |
31 | static int debug = 1; | |
32 | ||
33 | /* Logging can be modified by providing an appropriate log handler. */ | |
34 | static void (*logh)(int severity, const char *msg) = NULL; | |
43c02e7b | 35 | |
26fa5d17 | 36 | static void vlog(int, const char *, const char *, va_list); |
6f8925be | 37 | static void logit(int, const char *, const char *, ...); |
43c02e7b | 38 | |
9e5d99d4 | 39 | #define MAX_DBG_TOKENS 40 |
dcf5d2f7 | 40 | static const char *tokens[MAX_DBG_TOKENS + 1] = {NULL}; |
9e5d99d4 | 41 | |
43c02e7b | 42 | void |
6bb9c4e0 | 43 | log_init(int n_debug, const char *progname) |
43c02e7b | 44 | { |
43c02e7b VB |
45 | debug = n_debug; |
46 | ||
47 | if (!debug) | |
6bb9c4e0 | 48 | openlog(progname, LOG_PID | LOG_NDELAY, LOG_DAEMON); |
43c02e7b VB |
49 | |
50 | tzset(); | |
51 | } | |
52 | ||
2389d2cc VB |
53 | void |
54 | log_level(int n_debug) | |
55 | { | |
56 | if (debug > 0 && n_debug >= 1) | |
57 | debug = n_debug; | |
58 | } | |
59 | ||
4b292b55 VB |
60 | void |
61 | log_register(void (*cb)(int, const char*)) | |
62 | { | |
63 | logh = cb; | |
64 | } | |
65 | ||
9e5d99d4 VB |
66 | void |
67 | log_accept(const char *token) | |
68 | { | |
69 | int i; | |
70 | for (i = 0; i < MAX_DBG_TOKENS; i++) { | |
71 | if (tokens[i] == NULL) { | |
72 | tokens[i+1] = NULL; | |
73 | tokens[i] = token; | |
74 | return; | |
75 | } | |
76 | } | |
77 | } | |
4b292b55 | 78 | |
8888d191 | 79 | static void |
6f8925be | 80 | logit(int pri, const char *token, const char *fmt, ...) |
43c02e7b VB |
81 | { |
82 | va_list ap; | |
83 | ||
84 | va_start(ap, fmt); | |
6f8925be | 85 | vlog(pri, token, fmt, ap); |
43c02e7b VB |
86 | va_end(ap); |
87 | } | |
88 | ||
c9429a42 VB |
89 | static char * |
90 | date() | |
91 | { | |
92 | /* Return the current date as incomplete ISO 8601 (2012-12-12T16:13:30) */ | |
93 | static char date[] = "2012-12-12T16:13:30"; | |
94 | time_t t = time(NULL); | |
95 | struct tm *tmp = localtime(&t); | |
96 | strftime(date, sizeof(date), "%Y-%m-%dT%H:%M:%S", tmp); | |
97 | return date; | |
98 | } | |
99 | ||
100 | static const char * | |
101 | translate(int fd, int priority) | |
102 | { | |
103 | /* Translate a syslog priority to a string. With colors if the output is a terminal. */ | |
104 | int tty = isatty(fd); | |
105 | switch (tty) { | |
106 | case 1: | |
107 | switch (priority) { | |
26fa5d17 VB |
108 | case LOG_EMERG: return "\033[1;37;41m[EMRG"; |
109 | case LOG_ALERT: return "\033[1;37;41m[ALRT"; | |
110 | case LOG_CRIT: return "\033[1;37;41m[CRIT"; | |
111 | case LOG_ERR: return "\033[1;31m[ ERR"; | |
112 | case LOG_WARNING: return "\033[1;33m[WARN"; | |
113 | case LOG_NOTICE: return "\033[1;34m[NOTI"; | |
114 | case LOG_INFO: return "\033[1;34m[INFO"; | |
115 | case LOG_DEBUG: return "\033[1;30m[ DBG"; | |
c9429a42 VB |
116 | } |
117 | break; | |
118 | default: | |
119 | switch (priority) { | |
26fa5d17 VB |
120 | case LOG_EMERG: return "[EMRG"; |
121 | case LOG_ALERT: return "[ALRT"; | |
122 | case LOG_CRIT: return "[CRIT"; | |
123 | case LOG_ERR: return "[ ERR"; | |
124 | case LOG_WARNING: return "[WARN"; | |
125 | case LOG_NOTICE: return "[NOTI"; | |
126 | case LOG_INFO: return "[INFO"; | |
127 | case LOG_DEBUG: return "[ DBG"; | |
c9429a42 VB |
128 | } |
129 | } | |
130 | return "[UNKN]"; | |
131 | } | |
132 | ||
8888d191 | 133 | static void |
26fa5d17 | 134 | vlog(int pri, const char *token, const char *fmt, va_list ap) |
43c02e7b | 135 | { |
4b292b55 VB |
136 | if (logh) { |
137 | char *result; | |
138 | if (vasprintf(&result, fmt, ap) != -1) { | |
139 | logh(pri, result); | |
bea70314 | 140 | free(result); |
4b292b55 VB |
141 | return; |
142 | } | |
143 | /* Otherwise, fallback to output on stderr. */ | |
144 | } | |
145 | if (debug || logh) { | |
146 | char *nfmt; | |
43c02e7b | 147 | /* best effort in out of mem situations */ |
26fa5d17 | 148 | if (asprintf(&nfmt, "%s %s%s%s]%s %s\n", |
c9429a42 VB |
149 | date(), |
150 | translate(STDERR_FILENO, pri), | |
26fa5d17 VB |
151 | token ? "/" : "", token ? token : "", |
152 | isatty(STDERR_FILENO) ? "\033[0m" : "", | |
c9429a42 | 153 | fmt) == -1) { |
43c02e7b VB |
154 | vfprintf(stderr, fmt, ap); |
155 | fprintf(stderr, "\n"); | |
156 | } else { | |
157 | vfprintf(stderr, nfmt, ap); | |
158 | free(nfmt); | |
159 | } | |
160 | fflush(stderr); | |
161 | } else | |
162 | vsyslog(pri, fmt, ap); | |
163 | } | |
164 | ||
165 | ||
166 | void | |
26fa5d17 | 167 | log_warn(const char *token, const char *emsg, ...) |
43c02e7b VB |
168 | { |
169 | char *nfmt; | |
170 | va_list ap; | |
171 | ||
172 | /* best effort to even work in out of memory situations */ | |
173 | if (emsg == NULL) | |
c9429a42 | 174 | logit(LOG_WARNING, "%s", strerror(errno)); |
43c02e7b VB |
175 | else { |
176 | va_start(ap, emsg); | |
177 | ||
178 | if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) { | |
179 | /* we tried it... */ | |
26fa5d17 | 180 | vlog(LOG_WARNING, token, emsg, ap); |
c9429a42 | 181 | logit(LOG_WARNING, "%s", strerror(errno)); |
43c02e7b | 182 | } else { |
26fa5d17 | 183 | vlog(LOG_WARNING, token, nfmt, ap); |
43c02e7b VB |
184 | free(nfmt); |
185 | } | |
186 | va_end(ap); | |
187 | } | |
188 | } | |
189 | ||
190 | void | |
26fa5d17 | 191 | log_warnx(const char *token, const char *emsg, ...) |
43c02e7b VB |
192 | { |
193 | va_list ap; | |
194 | ||
195 | va_start(ap, emsg); | |
26fa5d17 | 196 | vlog(LOG_WARNING, token, emsg, ap); |
43c02e7b VB |
197 | va_end(ap); |
198 | } | |
199 | ||
200 | void | |
26fa5d17 | 201 | log_info(const char *token, const char *emsg, ...) |
43c02e7b VB |
202 | { |
203 | va_list ap; | |
204 | ||
e595efb4 VB |
205 | if (!debug || debug > 1 || logh) { |
206 | va_start(ap, emsg); | |
207 | vlog(LOG_INFO, token, emsg, ap); | |
208 | va_end(ap); | |
209 | } | |
43c02e7b VB |
210 | } |
211 | ||
9e5d99d4 VB |
212 | static int |
213 | log_debug_accept_token(const char *token) | |
214 | { | |
215 | int i; | |
216 | if (tokens[0] == NULL) return 1; | |
217 | for (i = 0; | |
218 | (i < MAX_DBG_TOKENS) && (tokens[i] != NULL); | |
219 | i++) { | |
220 | if (!strcmp(tokens[i], token)) | |
221 | return 1; | |
222 | } | |
223 | return 0; | |
224 | } | |
225 | ||
43c02e7b | 226 | void |
26fa5d17 | 227 | log_debug(const char *token, const char *emsg, ...) |
43c02e7b VB |
228 | { |
229 | va_list ap; | |
230 | ||
9e5d99d4 | 231 | if ((debug > 2 && log_debug_accept_token(token)) || logh) { |
43c02e7b | 232 | va_start(ap, emsg); |
26fa5d17 | 233 | vlog(LOG_DEBUG, token, emsg, ap); |
43c02e7b VB |
234 | va_end(ap); |
235 | } | |
236 | } | |
237 | ||
238 | void | |
6f8925be | 239 | fatal(const char *token, const char *emsg) |
43c02e7b VB |
240 | { |
241 | if (emsg == NULL) | |
6f8925be | 242 | logit(LOG_CRIT, token ? token : "fatal", "%s", strerror(errno)); |
43c02e7b VB |
243 | else |
244 | if (errno) | |
6f8925be | 245 | logit(LOG_CRIT, token ? token : "fatal", "%s: %s", |
43c02e7b VB |
246 | emsg, strerror(errno)); |
247 | else | |
6f8925be | 248 | logit(LOG_CRIT, token ? token : "fatal", "%s", emsg); |
43c02e7b VB |
249 | |
250 | exit(1); | |
251 | } | |
252 | ||
253 | void | |
a87db231 | 254 | fatalx(const char *token, const char *emsg) |
43c02e7b VB |
255 | { |
256 | errno = 0; | |
a87db231 | 257 | fatal(token, emsg); |
43c02e7b | 258 | } |