1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32
33 #include <sys/cdefs.h>
34 #include <err.h>
35 #include <errno.h>
36 #include <stdarg.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40
41 //#include "libc_private.h"
42
43 extern const char *_getprogname(void);
44
45 static FILE *err_file; /* file to use for error output */
46 static void (*err_exit)(int);
47
48 void _err(int eval, const char *fmt, ...);
49 void _warn(const char *fmt, ...);
50
51 /*
52 * This is declared to take a `void *' so that the caller is not required
53 * to include <stdio.h> first. However, it is really a `FILE *', and the
54 * manual page documents it as such.
55 */
56 void
err_set_file(void * fp)57 err_set_file(void *fp)
58 {
59 if (fp)
60 err_file = fp;
61 else
62 err_file = stderr;
63 }
64
65 void
err_set_exit(void (* ef)(int))66 err_set_exit(void (*ef)(int))
67 {
68 err_exit = ef;
69 }
70
71 __weak_reference(_err, err);
72
73 void
_err(int eval,const char * fmt,...)74 _err(int eval, const char *fmt, ...)
75 {
76 va_list ap;
77 va_start(ap, fmt);
78 verrc(eval, errno, fmt, ap);
79 va_end(ap);
80 }
81
82 void
verr(int eval,const char * fmt,va_list ap)83 verr(int eval, const char *fmt, va_list ap)
84 {
85 verrc(eval, errno, fmt, ap);
86 }
87
88 void
errc(int eval,int code,const char * fmt,...)89 errc(int eval, int code, const char *fmt, ...)
90 {
91 va_list ap;
92 va_start(ap, fmt);
93 verrc(eval, code, fmt, ap);
94 va_end(ap);
95 }
96
97 void
verrc(int eval,int code,const char * fmt,va_list ap)98 verrc(int eval, int code, const char *fmt, va_list ap)
99 {
100 if (err_file == NULL)
101 err_set_file(NULL);
102 fprintf(err_file, "%s: ", _getprogname());
103 if (fmt != NULL) {
104 vfprintf(err_file, fmt, ap);
105 fprintf(err_file, ": ");
106 }
107 fprintf(err_file, "%s\n", strerror(code));
108 if (err_exit)
109 err_exit(eval);
110 exit(eval);
111 }
112
113 void
errx(int eval,const char * fmt,...)114 errx(int eval, const char *fmt, ...)
115 {
116 va_list ap;
117 va_start(ap, fmt);
118 verrx(eval, fmt, ap);
119 va_end(ap);
120 }
121
122 void
verrx(int eval,const char * fmt,va_list ap)123 verrx(int eval, const char *fmt, va_list ap)
124 {
125 if (err_file == NULL)
126 err_set_file(NULL);
127 fprintf(err_file, "%s: ", _getprogname());
128 if (fmt != NULL)
129 vfprintf(err_file, fmt, ap);
130 fprintf(err_file, "\n");
131 if (err_exit)
132 err_exit(eval);
133 exit(eval);
134 }
135
136 __weak_reference(_warn, warn);
137
138 void
_warn(const char * fmt,...)139 _warn(const char *fmt, ...)
140 {
141 va_list ap;
142 va_start(ap, fmt);
143 vwarnc(errno, fmt, ap);
144 va_end(ap);
145 }
146
147 void
vwarn(const char * fmt,va_list ap)148 vwarn(const char *fmt, va_list ap)
149 {
150 vwarnc(errno, fmt, ap);
151 }
152
153 void
warnc(int code,const char * fmt,...)154 warnc(int code, const char *fmt, ...)
155 {
156 va_list ap;
157 va_start(ap, fmt);
158 vwarnc(code, fmt, ap);
159 va_end(ap);
160 }
161
162 void
vwarnc(int code,const char * fmt,va_list ap)163 vwarnc(int code, const char *fmt, va_list ap)
164 {
165 int saved_errno;
166
167 saved_errno = errno;
168 if (err_file == NULL)
169 err_set_file(NULL);
170 fprintf(err_file, "%s: ", _getprogname());
171 if (fmt != NULL) {
172 vfprintf(err_file, fmt, ap);
173 fprintf(err_file, ": ");
174 }
175 fprintf(err_file, "%s\n", strerror(code));
176 errno = saved_errno;
177 }
178
179 void
warnx(const char * fmt,...)180 warnx(const char *fmt, ...)
181 {
182 va_list ap;
183 va_start(ap, fmt);
184 vwarnx(fmt, ap);
185 va_end(ap);
186 }
187
188 void
vwarnx(const char * fmt,va_list ap)189 vwarnx(const char *fmt, va_list ap)
190 {
191 int saved_errno;
192
193 saved_errno = errno;
194 if (err_file == NULL)
195 err_set_file(NULL);
196 fprintf(err_file, "%s: ", _getprogname());
197 if (fmt != NULL)
198 vfprintf(err_file, fmt, ap);
199 fprintf(err_file, "\n");
200 errno = saved_errno;
201 }
202