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 #include "namespace.h"
33 #include <err.h>
34 #include <errno.h>
35 #include <stdarg.h>
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <string.h>
39 #include "un-namespace.h"
40
41 #include "libc_private.h"
42
43 static FILE *err_file; /* file to use for error output */
44 static void (*err_exit)(int);
45
46 /*
47 * This is declared to take a `void *' so that the caller is not required
48 * to include <stdio.h> first. However, it is really a `FILE *', and the
49 * manual page documents it as such.
50 */
51 void
err_set_file(void * fp)52 err_set_file(void *fp)
53 {
54 if (fp)
55 err_file = fp;
56 else
57 err_file = stderr;
58 }
59
60 void
err_set_exit(void (* ef)(int))61 err_set_exit(void (*ef)(int))
62 {
63 err_exit = ef;
64 }
65
66 __weak_reference(_err, err);
67
68 void
_err(int eval,const char * fmt,...)69 _err(int eval, const char *fmt, ...)
70 {
71 va_list ap;
72 va_start(ap, fmt);
73 verrc(eval, errno, fmt, ap);
74 va_end(ap);
75 }
76
77 void
verr(int eval,const char * fmt,va_list ap)78 verr(int eval, const char *fmt, va_list ap)
79 {
80 verrc(eval, errno, fmt, ap);
81 }
82
83 void
errc(int eval,int code,const char * fmt,...)84 errc(int eval, int code, const char *fmt, ...)
85 {
86 va_list ap;
87 va_start(ap, fmt);
88 verrc(eval, code, fmt, ap);
89 va_end(ap);
90 }
91
92 void
verrc(int eval,int code,const char * fmt,va_list ap)93 verrc(int eval, int code, const char *fmt, va_list ap)
94 {
95 if (err_file == NULL)
96 err_set_file(NULL);
97 fprintf(err_file, "%s: ", _getprogname());
98 if (fmt != NULL) {
99 vfprintf(err_file, fmt, ap);
100 fprintf(err_file, ": ");
101 }
102 fprintf(err_file, "%s\n", strerror(code));
103 if (err_exit)
104 err_exit(eval);
105 exit(eval);
106 }
107
108 void
errx(int eval,const char * fmt,...)109 errx(int eval, const char *fmt, ...)
110 {
111 va_list ap;
112 va_start(ap, fmt);
113 verrx(eval, fmt, ap);
114 va_end(ap);
115 }
116
117 void
verrx(int eval,const char * fmt,va_list ap)118 verrx(int eval, const char *fmt, va_list ap)
119 {
120 if (err_file == NULL)
121 err_set_file(NULL);
122 fprintf(err_file, "%s: ", _getprogname());
123 if (fmt != NULL)
124 vfprintf(err_file, fmt, ap);
125 fprintf(err_file, "\n");
126 if (err_exit)
127 err_exit(eval);
128 exit(eval);
129 }
130
131 __weak_reference(_warn, warn);
132
133 void
_warn(const char * fmt,...)134 _warn(const char *fmt, ...)
135 {
136 va_list ap;
137 va_start(ap, fmt);
138 vwarnc(errno, fmt, ap);
139 va_end(ap);
140 }
141
142 void
vwarn(const char * fmt,va_list ap)143 vwarn(const char *fmt, va_list ap)
144 {
145 vwarnc(errno, fmt, ap);
146 }
147
148 void
warnc(int code,const char * fmt,...)149 warnc(int code, const char *fmt, ...)
150 {
151 va_list ap;
152 va_start(ap, fmt);
153 vwarnc(code, fmt, ap);
154 va_end(ap);
155 }
156
157 void
vwarnc(int code,const char * fmt,va_list ap)158 vwarnc(int code, const char *fmt, va_list ap)
159 {
160 int saved_errno;
161
162 saved_errno = errno;
163 if (err_file == NULL)
164 err_set_file(NULL);
165 fprintf(err_file, "%s: ", _getprogname());
166 if (fmt != NULL) {
167 vfprintf(err_file, fmt, ap);
168 fprintf(err_file, ": ");
169 }
170 fprintf(err_file, "%s\n", strerror(code));
171 errno = saved_errno;
172 }
173
174 void
warnx(const char * fmt,...)175 warnx(const char *fmt, ...)
176 {
177 va_list ap;
178 va_start(ap, fmt);
179 vwarnx(fmt, ap);
180 va_end(ap);
181 }
182
183 void
vwarnx(const char * fmt,va_list ap)184 vwarnx(const char *fmt, va_list ap)
185 {
186 int saved_errno;
187
188 saved_errno = errno;
189 if (err_file == NULL)
190 err_set_file(NULL);
191 fprintf(err_file, "%s: ", _getprogname());
192 if (fmt != NULL)
193 vfprintf(err_file, fmt, ap);
194 fprintf(err_file, "\n");
195 errno = saved_errno;
196 }
197