errwarn.c revision 147072 
1/*	$OpenBSD: errwarn.c,v 1.7 2004/05/04 22:23:01 mickey Exp $	*/
2
3/* Errors and warnings... */
4
5/*
6 * Copyright (c) 1996 The Internet Software Consortium.
7 * All Rights Reserved.
8 * Copyright (c) 1995 RadioMail Corporation.  All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of RadioMail Corporation, the Internet Software
20 *    Consortium nor the names of its contributors may be used to endorse
21 *    or promote products derived from this software without specific
22 *    prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY RADIOMAIL CORPORATION, THE INTERNET
25 * SOFTWARE CONSORTIUM AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
27 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL RADIOMAIL CORPORATION OR CONTRIBUTORS
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
35 * OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * This software was written for RadioMail Corporation by Ted Lemon
38 * under a contract with Vixie Enterprises.   Further modifications have
39 * been made for the Internet Software Consortium under a contract
40 * with Vixie Laboratories.
41 */
42
43#include <errno.h>
44
45#include "dhcpd.h"
46
47static void do_percentm(char *obuf, size_t size, char *ibuf);
48
49static char mbuf[1024];
50static char fbuf[1024];
51
52int warnings_occurred;
53
54/*
55 * Log an error message, then exit.
56 */
57void
58error(char *fmt, ...)
59{
60	va_list list;
61
62	do_percentm(fbuf, sizeof(fbuf), fmt);
63
64	va_start(list, fmt);
65	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
66	va_end(list);
67
68#ifndef DEBUG
69	syslog(log_priority | LOG_ERR, "%s", mbuf);
70#endif
71
72	/* Also log it to stderr? */
73	if (log_perror) {
74		write(2, mbuf, strlen(mbuf));
75		write(2, "\n", 1);
76	}
77
78	syslog(LOG_CRIT, "exiting.");
79	if (log_perror) {
80		fprintf(stderr, "exiting.\n");
81		fflush(stderr);
82	}
83	exit(1);
84}
85
86/*
87 * Log a warning message...
88 */
89int
90warning(char *fmt, ...)
91{
92	va_list list;
93
94	do_percentm(fbuf, sizeof(fbuf), fmt);
95
96	va_start(list, fmt);
97	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
98	va_end(list);
99
100#ifndef DEBUG
101	syslog(log_priority | LOG_ERR, "%s", mbuf);
102#endif
103
104	if (log_perror) {
105		write(2, mbuf, strlen(mbuf));
106		write(2, "\n", 1);
107	}
108
109	return (0);
110}
111
112/*
113 * Log a note...
114 */
115int
116note(char *fmt, ...)
117{
118	va_list list;
119
120	do_percentm(fbuf, sizeof(fbuf), fmt);
121
122	va_start(list, fmt);
123	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
124	va_end(list);
125
126#ifndef DEBUG
127	syslog(log_priority | LOG_INFO, "%s", mbuf);
128#endif
129
130	if (log_perror) {
131		write(2, mbuf, strlen(mbuf));
132		write(2, "\n", 1);
133	}
134
135	return (0);
136}
137
138/*
139 * Log a debug message...
140 */
141int
142debug(char *fmt, ...)
143{
144	va_list list;
145
146	do_percentm(fbuf, sizeof(fbuf), fmt);
147
148	va_start(list, fmt);
149	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
150	va_end(list);
151
152#ifndef DEBUG
153	syslog(log_priority | LOG_DEBUG, "%s", mbuf);
154#endif
155
156	if (log_perror) {
157		write(2, mbuf, strlen(mbuf));
158		write(2, "\n", 1);
159	}
160
161	return (0);
162}
163
164/*
165 * Find %m in the input string and substitute an error message string.
166 */
167static void
168do_percentm(char *obuf, size_t size, char *ibuf)
169{
170	char ch;
171	char *s = ibuf;
172	char *t = obuf;
173	size_t prlen;
174	size_t fmt_left;
175	int saved_errno = errno;
176
177	/*
178	 * We wouldn't need this mess if printf handled %m, or if
179	 * strerror() had been invented before syslog().
180	 */
181	for (fmt_left = size; (ch = *s); ++s) {
182		if (ch == '%' && s[1] == 'm') {
183			++s;
184			prlen = snprintf(t, fmt_left, "%s",
185			    strerror(saved_errno));
186			if (prlen >= fmt_left)
187				prlen = fmt_left - 1;
188			t += prlen;
189			fmt_left -= prlen;
190		} else {
191			if (fmt_left > 1) {
192				*t++ = ch;
193				fmt_left--;
194			}
195		}
196	}
197	*t = '\0';
198}
199
200int
201parse_warn(char *fmt, ...)
202{
203	va_list list;
204	static char spaces[] =
205	    "                                        "
206	    "                                        "; /* 80 spaces */
207
208	do_percentm(mbuf, sizeof(mbuf), fmt);
209	snprintf(fbuf, sizeof(fbuf), "%s line %d: %s", tlname, lexline, mbuf);
210	va_start(list, fmt);
211	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
212	va_end(list);
213
214#ifndef DEBUG
215	syslog(log_priority | LOG_ERR, "%s", mbuf);
216	syslog(log_priority | LOG_ERR, "%s", token_line);
217	if (lexline < 81)
218		syslog(log_priority | LOG_ERR,
219		    "%s^", &spaces[sizeof(spaces) - lexchar]);
220#endif
221
222	if (log_perror) {
223		write(2, mbuf, strlen(mbuf));
224		write(2, "\n", 1);
225		write(2, token_line, strlen(token_line));
226		write(2, "\n", 1);
227		write(2, spaces, lexchar - 1);
228		write(2, "^\n", 2);
229	}
230
231	warnings_occurred = 1;
232
233	return (0);
234}
235