1 /* $OpenBSD: log.c,v 1.10 2023/04/19 12:58:16 jsg 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 USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/types.h>
20
21 #include <arpa/inet.h>
22 #include <errno.h>
23 #include <netdb.h>
24 #include <stdarg.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <syslog.h>
29 #include <time.h>
30 #include <unistd.h>
31
32 #include "eigrpd.h"
33 #include "log.h"
34
35 int debug;
36 int verbose;
37 const char *log_procname;
38
39 void
log_init(int n_debug)40 log_init(int n_debug)
41 {
42 extern char *__progname;
43
44 debug = n_debug;
45
46 if (!debug)
47 openlog(__progname, LOG_PID | LOG_NDELAY, LOG_DAEMON);
48
49 tzset();
50 }
51
52 void
log_verbose(int v)53 log_verbose(int v)
54 {
55 verbose = v;
56 }
57
58 void
logit(int pri,const char * fmt,...)59 logit(int pri, const char *fmt, ...)
60 {
61 va_list ap;
62
63 va_start(ap, fmt);
64 vlog(pri, fmt, ap);
65 va_end(ap);
66 }
67
68 void
vlog(int pri,const char * fmt,va_list ap)69 vlog(int pri, const char *fmt, va_list ap)
70 {
71 char *nfmt;
72
73 if (debug) {
74 /* best effort in out of mem situations */
75 if (asprintf(&nfmt, "%s\n", fmt) == -1) {
76 vfprintf(stderr, fmt, ap);
77 fprintf(stderr, "\n");
78 } else {
79 vfprintf(stderr, nfmt, ap);
80 free(nfmt);
81 }
82 fflush(stderr);
83 } else
84 vsyslog(pri, fmt, ap);
85 }
86
87 void
log_warn(const char * emsg,...)88 log_warn(const char *emsg, ...)
89 {
90 char *nfmt;
91 va_list ap;
92
93 /* best effort to even work in out of memory situations */
94 if (emsg == NULL)
95 logit(LOG_ERR, "%s", strerror(errno));
96 else {
97 va_start(ap, emsg);
98
99 if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) {
100 /* we tried it... */
101 vlog(LOG_ERR, emsg, ap);
102 logit(LOG_ERR, "%s", strerror(errno));
103 } else {
104 vlog(LOG_ERR, nfmt, ap);
105 free(nfmt);
106 }
107 va_end(ap);
108 }
109 }
110
111 void
log_warnx(const char * emsg,...)112 log_warnx(const char *emsg, ...)
113 {
114 va_list ap;
115
116 va_start(ap, emsg);
117 vlog(LOG_ERR, emsg, ap);
118 va_end(ap);
119 }
120
121 void
log_info(const char * emsg,...)122 log_info(const char *emsg, ...)
123 {
124 va_list ap;
125
126 va_start(ap, emsg);
127 vlog(LOG_INFO, emsg, ap);
128 va_end(ap);
129 }
130
131 void
log_debug(const char * emsg,...)132 log_debug(const char *emsg, ...)
133 {
134 va_list ap;
135
136 if (verbose) {
137 va_start(ap, emsg);
138 vlog(LOG_DEBUG, emsg, ap);
139 va_end(ap);
140 }
141 }
142
143 void
fatal(const char * emsg)144 fatal(const char *emsg)
145 {
146 if (emsg == NULL)
147 logit(LOG_CRIT, "fatal in %s: %s", log_procname,
148 strerror(errno));
149 else
150 if (errno)
151 logit(LOG_CRIT, "fatal in %s: %s: %s",
152 log_procname, emsg, strerror(errno));
153 else
154 logit(LOG_CRIT, "fatal in %s: %s",
155 log_procname, emsg);
156
157 exit(1);
158 }
159
160 void
fatalx(const char * emsg)161 fatalx(const char *emsg)
162 {
163 errno = 0;
164 fatal(emsg);
165 }
166