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 #include <errno.h>
47
48 #include "dhcpd.h"
49
50 static void do_percentm(char *obuf, size_t size, const char *ibuf);
51
52 static char mbuf[1024];
53 static char fbuf[1024];
54
55 int warnings_occurred;
56
57 /*
58 * Log an error message, then exit.
59 */
60 void
error(const char * fmt,...)61 error(const char *fmt, ...)
62 {
63 va_list list;
64
65 do_percentm(fbuf, sizeof(fbuf), fmt);
66
67 va_start(list, fmt);
68 vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
69 va_end(list);
70
71 #ifndef DEBUG
72 cap_syslog(capsyslog, log_priority | LOG_ERR, "%s", mbuf);
73 #endif
74
75 /* Also log it to stderr? */
76 if (log_perror) {
77 write(2, mbuf, strlen(mbuf));
78 write(2, "\n", 1);
79 }
80
81 cap_syslog(capsyslog, LOG_CRIT, "exiting.");
82 if (log_perror) {
83 fprintf(stderr, "exiting.\n");
84 fflush(stderr);
85 }
86 if (pidfile != NULL)
87 pidfile_remove(pidfile);
88 exit(1);
89 }
90
91 /*
92 * Log a warning message...
93 */
94 int
warning(const char * fmt,...)95 warning(const char *fmt, ...)
96 {
97 va_list list;
98
99 do_percentm(fbuf, sizeof(fbuf), fmt);
100
101 va_start(list, fmt);
102 vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
103 va_end(list);
104
105 #ifndef DEBUG
106 cap_syslog(capsyslog, log_priority | LOG_ERR, "%s", mbuf);
107 #endif
108
109 if (log_perror) {
110 write(2, mbuf, strlen(mbuf));
111 write(2, "\n", 1);
112 }
113
114 return (0);
115 }
116
117 /*
118 * Log a note...
119 */
120 int
note(const char * fmt,...)121 note(const char *fmt, ...)
122 {
123 va_list list;
124
125 do_percentm(fbuf, sizeof(fbuf), fmt);
126
127 va_start(list, fmt);
128 vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
129 va_end(list);
130
131 #ifndef DEBUG
132 cap_syslog(capsyslog, log_priority | LOG_INFO, "%s", mbuf);
133 #endif
134
135 if (log_perror) {
136 write(2, mbuf, strlen(mbuf));
137 write(2, "\n", 1);
138 }
139
140 return (0);
141 }
142
143 /*
144 * Log a debug message...
145 */
146 int
debug(const char * fmt,...)147 debug(const char *fmt, ...)
148 {
149 va_list list;
150
151 do_percentm(fbuf, sizeof(fbuf), fmt);
152
153 va_start(list, fmt);
154 vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
155 va_end(list);
156
157 #ifndef DEBUG
158 cap_syslog(capsyslog, log_priority | LOG_DEBUG, "%s", mbuf);
159 #endif
160
161 if (log_perror) {
162 write(2, mbuf, strlen(mbuf));
163 write(2, "\n", 1);
164 }
165
166 return (0);
167 }
168
169 /*
170 * Find %m in the input string and substitute an error message string.
171 */
172 static void
do_percentm(char * obuf,size_t size,const char * ibuf)173 do_percentm(char *obuf, size_t size, const char *ibuf)
174 {
175 char ch;
176 const char *s = ibuf;
177 char *t = obuf;
178 size_t prlen;
179 size_t fmt_left;
180 int saved_errno = errno;
181
182 /*
183 * We wouldn't need this mess if printf handled %m, or if
184 * strerror() had been invented before syslog().
185 */
186 for (fmt_left = size; (ch = *s); ++s) {
187 if (ch == '%' && s[1] == 'm') {
188 ++s;
189 prlen = snprintf(t, fmt_left, "%s",
190 strerror(saved_errno));
191 if (prlen >= fmt_left)
192 prlen = fmt_left - 1;
193 t += prlen;
194 fmt_left -= prlen;
195 } else {
196 if (fmt_left > 1) {
197 *t++ = ch;
198 fmt_left--;
199 }
200 }
201 }
202 *t = '\0';
203 }
204
205 int
parse_warn(const char * fmt,...)206 parse_warn(const char *fmt, ...)
207 {
208 va_list list;
209 static char spaces[] =
210 " "
211 " "; /* 80 spaces */
212
213 do_percentm(mbuf, sizeof(mbuf), fmt);
214 snprintf(fbuf, sizeof(fbuf), "%s line %d: %s", tlname, lexline, mbuf);
215 va_start(list, fmt);
216 vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
217 va_end(list);
218
219 #ifndef DEBUG
220 cap_syslog(capsyslog, log_priority | LOG_ERR, "%s", mbuf);
221 cap_syslog(capsyslog, log_priority | LOG_ERR, "%s", token_line);
222 if (lexline < 81)
223 cap_syslog(capsyslog, log_priority | LOG_ERR,
224 "%s^", &spaces[sizeof(spaces) - lexchar]);
225 #endif
226
227 if (log_perror) {
228 write(2, mbuf, strlen(mbuf));
229 write(2, "\n", 1);
230 write(2, token_line, strlen(token_line));
231 write(2, "\n", 1);
232 write(2, spaces, lexchar - 1);
233 write(2, "^\n", 2);
234 }
235
236 warnings_occurred = 1;
237
238 return (0);
239 }
240