xref: /openbsd-src/usr.sbin/ntpd/log.c (revision daf88648c0e349d5c02e1504293082072c981640)
1 /*	$OpenBSD: log.c,v 1.7 2005/03/31 12:14:01 henning 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 <errno.h>
20 #include <stdarg.h>
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24 #include <syslog.h>
25 #include <time.h>
26 
27 #include "ntpd.h"
28 
29 int	 debug;
30 
31 void	 logit(int, const char *, ...);
32 
33 void
34 log_init(int n_debug)
35 {
36 	extern char	*__progname;
37 
38 	debug = n_debug;
39 
40 	if (!debug)
41 		openlog(__progname, LOG_PID | LOG_NDELAY, LOG_DAEMON);
42 
43 	tzset();
44 }
45 
46 void
47 logit(int pri, const char *fmt, ...)
48 {
49 	va_list	ap;
50 
51 	va_start(ap, fmt);
52 	vlog(pri, fmt, ap);
53 	va_end(ap);
54 }
55 
56 void
57 vlog(int pri, const char *fmt, va_list ap)
58 {
59 	char	*nfmt;
60 
61 	if (debug) {
62 		/* best effort in out of mem situations */
63 		if (asprintf(&nfmt, "%s\n", fmt) == -1) {
64 			vfprintf(stderr, fmt, ap);
65 			fprintf(stderr, "\n");
66 		} else {
67 			vfprintf(stderr, nfmt, ap);
68 			free(nfmt);
69 		}
70 		fflush(stderr);
71 	} else
72 		vsyslog(pri, fmt, ap);
73 }
74 
75 
76 void
77 log_warn(const char *emsg, ...)
78 {
79 	char	*nfmt;
80 	va_list	 ap;
81 
82 	/* best effort to even work in out of memory situations */
83 	if (emsg == NULL)
84 		logit(LOG_CRIT, "%s", strerror(errno));
85 	else {
86 		va_start(ap, emsg);
87 
88 		if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) {
89 			/* we tried it... */
90 			vlog(LOG_CRIT, emsg, ap);
91 			logit(LOG_CRIT, "%s", strerror(errno));
92 		} else {
93 			vlog(LOG_CRIT, nfmt, ap);
94 			free(nfmt);
95 		}
96 		va_end(ap);
97 	}
98 }
99 
100 void
101 log_warnx(const char *emsg, ...)
102 {
103 	va_list	 ap;
104 
105 	va_start(ap, emsg);
106 	vlog(LOG_CRIT, emsg, ap);
107 	va_end(ap);
108 }
109 
110 void
111 log_info(const char *emsg, ...)
112 {
113 	va_list	 ap;
114 
115 	va_start(ap, emsg);
116 	vlog(LOG_INFO, emsg, ap);
117 	va_end(ap);
118 }
119 
120 void
121 log_debug(const char *emsg, ...)
122 {
123 	va_list	 ap;
124 
125 	if (debug) {
126 		va_start(ap, emsg);
127 		vlog(LOG_DEBUG, emsg, ap);
128 		va_end(ap);
129 	}
130 }
131 
132 void
133 fatal(const char *emsg)
134 {
135 	if (emsg == NULL)
136 		logit(LOG_CRIT, "fatal: %s", strerror(errno));
137 	else
138 		if (errno)
139 			logit(LOG_CRIT, "fatal: %s: %s",
140 			    emsg, strerror(errno));
141 		else
142 			logit(LOG_CRIT, "fatal: %s", emsg);
143 
144 	exit(1);
145 }
146 
147 void
148 fatalx(const char *emsg)
149 {
150 	errno = 0;
151 	fatal(emsg);
152 }
153 
154 const char *
155 log_sockaddr(struct sockaddr *sa)
156 {
157 	static char	buf[NI_MAXHOST];
158 
159 	if (getnameinfo(sa, SA_LEN(sa), buf, sizeof(buf), NULL, 0,
160 	    NI_NUMERICHOST))
161 		return ("(unknown)");
162 	else
163 		return (buf);
164 }
165