1 /* $OpenBSD: errwarn.c,v 1.7 2004/05/04 22:23:01 mickey Exp $ */
2
3 /* Errors and warnings... */
4
5 /*-
6 * SPDX-License-Identifier: BSD-3-Clause
7 *
8 * Copyright (c) 1996 The Internet Software Consortium.
9 * All Rights Reserved.
10 * Copyright (c) 1995 RadioMail Corporation. All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of RadioMail Corporation, the Internet Software
22 * Consortium nor the names of its contributors may be used to endorse
23 * or promote products derived from this software without specific
24 * prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY RADIOMAIL CORPORATION, THE INTERNET
27 * SOFTWARE CONSORTIUM AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
28 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
29 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL RADIOMAIL CORPORATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
37 * OF THE POSSIBILITY OF SUCH DAMAGE.
38 *
39 * This software was written for RadioMail Corporation by Ted Lemon
40 * under a contract with Vixie Enterprises. Further modifications have
41 * been made for the Internet Software Consortium under a contract
42 * with Vixie Laboratories.
43 */
44
45 #include <sys/cdefs.h>
46 __FBSDID("$FreeBSD$");
47
48 #include <errno.h>
49
50 #include "dhcpd.h"
51
52 static void do_percentm(char *obuf, size_t size, const char *ibuf);
53
54 static char mbuf[1024];
55 static char fbuf[1024];
56
57 int warnings_occurred;
58
59 /*
60 * Log an error message, then exit.
61 */
62 void
error(const char * fmt,...)63 error(const char *fmt, ...)
64 {
65 va_list list;
66
67 do_percentm(fbuf, sizeof(fbuf), fmt);
68
69 va_start(list, fmt);
70 vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
71 va_end(list);
72
73 #ifndef DEBUG
74 cap_syslog(capsyslog, log_priority | LOG_ERR, "%s", mbuf);
75 #endif
76
77 /* Also log it to stderr? */
78 if (log_perror) {
79 write(2, mbuf, strlen(mbuf));
80 write(2, "\n", 1);
81 }
82
83 cap_syslog(capsyslog, LOG_CRIT, "exiting.");
84 if (log_perror) {
85 fprintf(stderr, "exiting.\n");
86 fflush(stderr);
87 }
88 if (pidfile != NULL)
89 pidfile_remove(pidfile);
90 exit(1);
91 }
92
93 /*
94 * Log a warning message...
95 */
96 int
warning(const char * fmt,...)97 warning(const char *fmt, ...)
98 {
99 va_list list;
100
101 do_percentm(fbuf, sizeof(fbuf), fmt);
102
103 va_start(list, fmt);
104 vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
105 va_end(list);
106
107 #ifndef DEBUG
108 cap_syslog(capsyslog, log_priority | LOG_ERR, "%s", mbuf);
109 #endif
110
111 if (log_perror) {
112 write(2, mbuf, strlen(mbuf));
113 write(2, "\n", 1);
114 }
115
116 return (0);
117 }
118
119 /*
120 * Log a note...
121 */
122 int
note(const char * fmt,...)123 note(const char *fmt, ...)
124 {
125 va_list list;
126
127 do_percentm(fbuf, sizeof(fbuf), fmt);
128
129 va_start(list, fmt);
130 vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
131 va_end(list);
132
133 #ifndef DEBUG
134 cap_syslog(capsyslog, log_priority | LOG_INFO, "%s", mbuf);
135 #endif
136
137 if (log_perror) {
138 write(2, mbuf, strlen(mbuf));
139 write(2, "\n", 1);
140 }
141
142 return (0);
143 }
144
145 /*
146 * Log a debug message...
147 */
148 int
debug(const char * fmt,...)149 debug(const char *fmt, ...)
150 {
151 va_list list;
152
153 do_percentm(fbuf, sizeof(fbuf), fmt);
154
155 va_start(list, fmt);
156 vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
157 va_end(list);
158
159 #ifndef DEBUG
160 cap_syslog(capsyslog, log_priority | LOG_DEBUG, "%s", mbuf);
161 #endif
162
163 if (log_perror) {
164 write(2, mbuf, strlen(mbuf));
165 write(2, "\n", 1);
166 }
167
168 return (0);
169 }
170
171 /*
172 * Find %m in the input string and substitute an error message string.
173 */
174 static void
do_percentm(char * obuf,size_t size,const char * ibuf)175 do_percentm(char *obuf, size_t size, const char *ibuf)
176 {
177 char ch;
178 const char *s = ibuf;
179 char *t = obuf;
180 size_t prlen;
181 size_t fmt_left;
182 int saved_errno = errno;
183
184 /*
185 * We wouldn't need this mess if printf handled %m, or if
186 * strerror() had been invented before syslog().
187 */
188 for (fmt_left = size; (ch = *s); ++s) {
189 if (ch == '%' && s[1] == 'm') {
190 ++s;
191 prlen = snprintf(t, fmt_left, "%s",
192 strerror(saved_errno));
193 if (prlen >= fmt_left)
194 prlen = fmt_left - 1;
195 t += prlen;
196 fmt_left -= prlen;
197 } else {
198 if (fmt_left > 1) {
199 *t++ = ch;
200 fmt_left--;
201 }
202 }
203 }
204 *t = '\0';
205 }
206
207 int
parse_warn(const char * fmt,...)208 parse_warn(const char *fmt, ...)
209 {
210 va_list list;
211 static char spaces[] =
212 " "
213 " "; /* 80 spaces */
214
215 do_percentm(mbuf, sizeof(mbuf), fmt);
216 snprintf(fbuf, sizeof(fbuf), "%s line %d: %s", tlname, lexline, mbuf);
217 va_start(list, fmt);
218 vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
219 va_end(list);
220
221 #ifndef DEBUG
222 cap_syslog(capsyslog, log_priority | LOG_ERR, "%s", mbuf);
223 cap_syslog(capsyslog, log_priority | LOG_ERR, "%s", token_line);
224 if (lexline < 81)
225 cap_syslog(capsyslog, log_priority | LOG_ERR,
226 "%s^", &spaces[sizeof(spaces) - lexchar]);
227 #endif
228
229 if (log_perror) {
230 write(2, mbuf, strlen(mbuf));
231 write(2, "\n", 1);
232 write(2, token_line, strlen(token_line));
233 write(2, "\n", 1);
234 write(2, spaces, lexchar - 1);
235 write(2, "^\n", 2);
236 }
237
238 warnings_occurred = 1;
239
240 return (0);
241 }
242