1 /* $OpenBSD: log.c,v 1.1 2008/06/26 15:10:01 pyr Exp $ */
2
3 /*
4 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/types.h>
20
21 #include <errno.h>
22 #include <stdarg.h>
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <syslog.h>
27 #include <time.h>
28
29 void log_init(int);
30 void log_warn(const char *, ...);
31 void log_warnx(const char *, ...);
32 void log_info(const char *, ...);
33 void log_debug(const char *, ...);
34 __dead2 void fatal(const char *);
35 __dead2 void fatalx(const char *);
36
37 int debug;
38
39 void vlog(int, const char *, va_list);
40 void logit(int, const char *, ...);
41
42 void
log_init(int n_debug)43 log_init(int n_debug)
44 {
45 extern char *__progname;
46
47 debug = n_debug;
48
49 if (!debug)
50 openlog(__progname, LOG_PID | LOG_NDELAY, LOG_DAEMON);
51
52 tzset();
53 }
54
55 void
logit(int pri,const char * fmt,...)56 logit(int pri, const char *fmt, ...)
57 {
58 va_list ap;
59
60 va_start(ap, fmt);
61 vlog(pri, fmt, ap);
62 va_end(ap);
63 }
64
65 void
vlog(int pri,const char * fmt,va_list ap)66 vlog(int pri, const char *fmt, va_list ap)
67 {
68 char *nfmt;
69
70 if (debug) {
71 /* best effort in out of mem situations */
72 if (asprintf(&nfmt, "%s\n", fmt) == -1) {
73 vfprintf(stderr, fmt, ap);
74 fprintf(stderr, "\n");
75 } else {
76 vfprintf(stderr, nfmt, ap);
77 free(nfmt);
78 }
79 fflush(stderr);
80 } else
81 vsyslog(pri, fmt, ap);
82 }
83
84
85 void
log_warn(const char * emsg,...)86 log_warn(const char *emsg, ...)
87 {
88 char *nfmt;
89 va_list ap;
90
91 /* best effort to even work in out of memory situations */
92 if (emsg == NULL)
93 logit(LOG_CRIT, "%s", strerror(errno));
94 else {
95 va_start(ap, emsg);
96
97 if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) {
98 /* we tried it... */
99 vlog(LOG_CRIT, emsg, ap);
100 logit(LOG_CRIT, "%s", strerror(errno));
101 } else {
102 vlog(LOG_CRIT, nfmt, ap);
103 free(nfmt);
104 }
105 va_end(ap);
106 }
107 }
108
109 void
log_warnx(const char * emsg,...)110 log_warnx(const char *emsg, ...)
111 {
112 va_list ap;
113
114 va_start(ap, emsg);
115 vlog(LOG_CRIT, emsg, ap);
116 va_end(ap);
117 }
118
119 void
log_info(const char * emsg,...)120 log_info(const char *emsg, ...)
121 {
122 va_list ap;
123
124 va_start(ap, emsg);
125 vlog(LOG_INFO, emsg, ap);
126 va_end(ap);
127 }
128
129 void
log_debug(const char * emsg,...)130 log_debug(const char *emsg, ...)
131 {
132 va_list ap;
133
134 if (debug > 1) {
135 va_start(ap, emsg);
136 vlog(LOG_DEBUG, emsg, ap);
137 va_end(ap);
138 }
139 }
140
141 void
fatal(const char * emsg)142 fatal(const char *emsg)
143 {
144 if (emsg == NULL)
145 logit(LOG_CRIT, "fatal: %s", strerror(errno));
146 else
147 if (errno)
148 logit(LOG_CRIT, "fatal: %s: %s",
149 emsg, strerror(errno));
150 else
151 logit(LOG_CRIT, "fatal: %s", emsg);
152
153 exit(1);
154 }
155
156 void
fatalx(const char * emsg)157 fatalx(const char *emsg)
158 {
159 errno = 0;
160 fatal(emsg);
161 }
162