1/*	$OpenBSD: log.c,v 1.8 2021/01/19 10:16:44 claudio 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 <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#include <unistd.h>
27
28#include "log.h"
29#include "ripd.h"
30
31int		 debug;
32int		 verbose;
33const char	*log_procname;
34
35void
36log_init(int n_debug)
37{
38	extern char	*__progname;
39
40	debug = n_debug;
41
42	if (!debug)
43		openlog(__progname, LOG_PID | LOG_NDELAY, LOG_DAEMON);
44
45	tzset();
46}
47
48void
49log_verbose(int v)
50{
51	verbose = v;
52}
53
54void
55logit(int pri, const char *fmt, ...)
56{
57	va_list	ap;
58
59	va_start(ap, fmt);
60	vlog(pri, fmt, ap);
61	va_end(ap);
62}
63
64void
65vlog(int pri, const char *fmt, va_list ap)
66{
67	char	*nfmt;
68
69	if (debug) {
70		/* best effort in out of mem situations */
71		if (asprintf(&nfmt, "%s\n", fmt) == -1) {
72			vfprintf(stderr, fmt, ap);
73			fprintf(stderr, "\n");
74		} else {
75			vfprintf(stderr, nfmt, ap);
76			free(nfmt);
77		}
78		fflush(stderr);
79	} else
80		vsyslog(pri, fmt, ap);
81}
82
83void
84log_warn(const char *emsg, ...)
85{
86	char	*nfmt;
87	va_list	 ap;
88
89	/* best effort to even work in out of memory situations */
90	if (emsg == NULL)
91		logit(LOG_ERR, "%s", strerror(errno));
92	else {
93		va_start(ap, emsg);
94
95		if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) {
96			/* we tried it... */
97			vlog(LOG_ERR, emsg, ap);
98			logit(LOG_ERR, "%s", strerror(errno));
99		} else {
100			vlog(LOG_ERR, nfmt, ap);
101			free(nfmt);
102		}
103		va_end(ap);
104	}
105}
106
107void
108log_warnx(const char *emsg, ...)
109{
110	va_list	 ap;
111
112	va_start(ap, emsg);
113	vlog(LOG_ERR, emsg, ap);
114	va_end(ap);
115}
116
117void
118log_info(const char *emsg, ...)
119{
120	va_list	 ap;
121
122	va_start(ap, emsg);
123	vlog(LOG_INFO, emsg, ap);
124	va_end(ap);
125}
126
127void
128log_debug(const char *emsg, ...)
129{
130	va_list	 ap;
131
132	if (verbose) {
133		va_start(ap, emsg);
134		vlog(LOG_DEBUG, emsg, ap);
135		va_end(ap);
136	}
137}
138
139void
140fatal(const char *emsg)
141{
142	if (emsg == NULL)
143		logit(LOG_CRIT, "fatal in %s: %s", log_procname,
144		    strerror(errno));
145	else
146		if (errno)
147			logit(LOG_CRIT, "fatal in %s: %s: %s",
148			    log_procname, emsg, strerror(errno));
149		else
150			logit(LOG_CRIT, "fatal in %s: %s",
151			    log_procname, emsg);
152
153	exit(1);
154}
155
156void
157fatalx(const char *emsg)
158{
159	errno = 0;
160	fatal(emsg);
161}
162