dhclient - Print out debug messages only when DEBUG is defined.
[dragonfly.git] / sbin / dhclient / errwarn.c
CommitLineData
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1/* $OpenBSD: errwarn.c,v 1.15 2007/03/02 11:31:17 henning Exp $ */
2/* $DragonFly: src/sbin/dhclient/errwarn.c,v 1.1 2008/08/30 16:07:58 hasso Exp $ */
3
4/* Errors and warnings... */
5
6/*
7 * Copyright (c) 1996 The Internet Software Consortium.
8 * All Rights Reserved.
9 * Copyright (c) 1995 RadioMail Corporation. All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 *
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of RadioMail Corporation, the Internet Software
21 * Consortium nor the names of its contributors may be used to endorse
22 * or promote products derived from this software without specific
23 * prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY RADIOMAIL CORPORATION, THE INTERNET
26 * SOFTWARE CONSORTIUM AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
27 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
28 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL RADIOMAIL CORPORATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
36 * OF THE POSSIBILITY OF SUCH DAMAGE.
37 *
38 * This software was written for RadioMail Corporation by Ted Lemon
39 * under a contract with Vixie Enterprises. Further modifications have
40 * been made for the Internet Software Consortium under a contract
41 * with Vixie Laboratories.
42 */
43
44#include <sys/types.h>
45#include <sys/uio.h>
46
47#include <errno.h>
48#include <unistd.h>
49
50#include "dhcpd.h"
51
52static void do_percentm(char *obuf, size_t size, char *ibuf);
53
54static char mbuf[1024];
55static char fbuf[1024];
56
57int warnings_occurred;
58
59/*
60 * Log an error message, then exit.
61 */
62void
63error(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 syslog(LOG_ERR, "%s", mbuf);
75#endif
76
77 /* Also log it to stderr? */
78 if (log_perror) {
79 write(STDERR_FILENO, mbuf, strlen(mbuf));
80 write(STDERR_FILENO, "\n", 1);
81 }
82
83 syslog(LOG_CRIT, "exiting.");
84 if (log_perror) {
85 fprintf(stderr, "exiting.\n");
86 fflush(stderr);
87 }
88 exit(1);
89}
90
91/*
92 * Log a warning message...
93 */
94int
95warning(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 syslog(LOG_ERR, "%s", mbuf);
107#endif
108
109 if (log_perror) {
110 write(STDERR_FILENO, mbuf, strlen(mbuf));
111 write(STDERR_FILENO, "\n", 1);
112 }
113
114 return (0);
115}
116
117/*
118 * Log a note...
119 */
120int
121note(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 syslog(LOG_INFO, "%s", mbuf);
133#endif
134
135 if (log_perror) {
136 write(STDERR_FILENO, mbuf, strlen(mbuf));
137 write(STDERR_FILENO, "\n", 1);
138 }
139
140 return (0);
141}
142
4cada237 143#ifdef DEBUG
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144/*
145 * Log a debug message...
146 */
147int
148debug(char *fmt, ...)
149{
150 va_list list;
151
152 do_percentm(fbuf, sizeof(fbuf), fmt);
153
154 va_start(list, fmt);
155 vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
156 va_end(list);
157
846204b6 158 syslog(LOG_DEBUG, "%s", mbuf);
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159
160 if (log_perror) {
161 write(STDERR_FILENO, mbuf, strlen(mbuf));
162 write(STDERR_FILENO, "\n", 1);
163 }
164
165 return (0);
166}
4cada237 167#endif
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168/*
169 * Find %m in the input string and substitute an error message string.
170 */
171static void
172do_percentm(char *obuf, size_t size, char *ibuf)
173{
174 char ch;
175 char *s = ibuf;
176 char *t = obuf;
177 int prlen;
178 ssize_t fmt_left;
179 int saved_errno = errno;
180
181 /*
182 * We wouldn't need this mess if printf handled %m, or if
183 * strerror() had been invented before syslog().
184 */
185 for (fmt_left = size; (ch = *s); ++s) {
186 if (ch == '%' && s[1] == 'm') {
187 ++s;
188 prlen = snprintf(t, fmt_left, "%s",
189 strerror(saved_errno));
190 if (prlen == -1)
191 prlen = 0;
192 else if (prlen >= fmt_left)
193 prlen = fmt_left - 1;
194 t += prlen;
195 fmt_left -= prlen;
196 } else {
197 if (fmt_left > 1) {
198 *t++ = ch;
199 fmt_left--;
200 }
201 }
202 }
203 *t = '\0';
204}
205
206int
207parse_warn(char *fmt, ...)
208{
209 va_list list;
210 static char spaces[] =
211 " "
212 " "; /* 80 spaces */
213 struct iovec iov[6];
214 size_t iovcnt;
215
216 do_percentm(mbuf, sizeof(mbuf), fmt);
217 snprintf(fbuf, sizeof(fbuf), "%s line %d: %s", tlname, lexline, mbuf);
218 va_start(list, fmt);
219 vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
220 va_end(list);
221
222#ifndef DEBUG
223 syslog(LOG_ERR, "%s", mbuf);
224 syslog(LOG_ERR, "%s", token_line);
225 if (lexchar < 81)
226 syslog(LOG_ERR, "%*c", lexchar, '^');
227#endif
228
229 if (log_perror) {
230 iov[0].iov_base = mbuf;
231 iov[0].iov_len = strlen(mbuf);
232 iov[1].iov_base = "\n";
233 iov[1].iov_len = 1;
234 iov[2].iov_base = token_line;
235 iov[2].iov_len = strlen(token_line);
236 iov[3].iov_base = "\n";
237 iov[3].iov_len = 1;
238 iovcnt = 4;
239 if (lexchar < 81) {
240 iov[4].iov_base = spaces;
241 iov[4].iov_len = lexchar - 1;
242 iov[5].iov_base = "^\n";
243 iov[5].iov_len = 2;
244 iovcnt += 2;
245 }
246 writev(STDERR_FILENO, iov, iovcnt);
247 }
248 warnings_occurred = 1;
249 return (0);
250}