xref: /freebsd/lib/libc/gen/err.c (revision a220d00e74dd245b4fca59c5eca0c53963686325)
1 /*-
2  * Copyright (c) 1993
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *	This product includes software developed by the University of
16  *	California, Berkeley and its contributors.
17  * 4. Neither the name of the University nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  *	From: @(#)err.c	8.1 (Berkeley) 6/4/93
33  */
34 
35 #if defined(LIBC_RCS) && !defined(lint)
36 static const char rcsid[] =
37   "$FreeBSD$";
38 #endif /* LIBC_RCS and not lint */
39 
40 #include "namespace.h"
41 #include <err.h>
42 #include "un-namespace.h"
43 #include <errno.h>
44 #include <stdio.h>
45 #include <stdlib.h>
46 #include <string.h>
47 
48 #include <stdarg.h>
49 
50 extern char *__progname;		/* Program name, from crt0. */
51 
52 static FILE *err_file; /* file to use for error output */
53 static void (*err_exit)(int);
54 
55 /*
56  * This is declared to take a `void *' so that the caller is not required
57  * to include <stdio.h> first.  However, it is really a `FILE *', and the
58  * manual page documents it as such.
59  */
60 void
61 err_set_file(void *fp)
62 {
63 	if (fp)
64 		err_file = fp;
65 	else
66 		err_file = stderr;
67 }
68 
69 void
70 err_set_exit(void (*ef)(int))
71 {
72 	err_exit = ef;
73 }
74 
75 __weak_reference(_err, err);
76 
77 void
78 _err(int eval, const char *fmt, ...)
79 {
80 	va_list ap;
81 	va_start(ap, fmt);
82 	verrc(eval, errno, fmt, ap);
83 	va_end(ap);
84 }
85 
86 void
87 verr(eval, fmt, ap)
88 	int eval;
89 	const char *fmt;
90 	va_list ap;
91 {
92 	verrc(eval, errno, fmt, ap);
93 }
94 
95 void
96 errc(int eval, int code, const char *fmt, ...)
97 {
98 	va_list ap;
99 	va_start(ap, fmt);
100 	verrc(eval, code, fmt, ap);
101 	va_end(ap);
102 }
103 
104 void
105 verrc(eval, code, fmt, ap)
106 	int eval;
107 	int code;
108 	const char *fmt;
109 	va_list ap;
110 {
111 	if (err_file == 0)
112 		err_set_file((FILE *)0);
113 	fprintf(err_file, "%s: ", __progname);
114 	if (fmt != NULL) {
115 		vfprintf(err_file, fmt, ap);
116 		fprintf(err_file, ": ");
117 	}
118 	fprintf(err_file, "%s\n", strerror(code));
119 	if (err_exit)
120 		err_exit(eval);
121 	exit(eval);
122 }
123 
124 void
125 errx(int eval, const char *fmt, ...)
126 {
127 	va_list ap;
128 	va_start(ap, fmt);
129 	verrx(eval, fmt, ap);
130 	va_end(ap);
131 }
132 
133 void
134 verrx(eval, fmt, ap)
135 	int eval;
136 	const char *fmt;
137 	va_list ap;
138 {
139 	if (err_file == 0)
140 		err_set_file((FILE *)0);
141 	fprintf(err_file, "%s: ", __progname);
142 	if (fmt != NULL)
143 		vfprintf(err_file, fmt, ap);
144 	fprintf(err_file, "\n");
145 	if (err_exit)
146 		err_exit(eval);
147 	exit(eval);
148 }
149 
150 __weak_reference(_warn, warn);
151 
152 void
153 _warn(const char *fmt, ...)
154 {
155 	va_list ap;
156 	va_start(ap, fmt);
157 	vwarnc(errno, fmt, ap);
158 	va_end(ap);
159 }
160 
161 void
162 vwarn(fmt, ap)
163 	const char *fmt;
164 	va_list ap;
165 {
166 	vwarnc(errno, fmt, ap);
167 }
168 
169 void
170 warnc(int code, const char *fmt, ...)
171 {
172 	va_list ap;
173 	va_start(ap, fmt);
174 	vwarnc(code, fmt, ap);
175 	va_end(ap);
176 }
177 
178 void
179 vwarnc(code, fmt, ap)
180 	int code;
181 	const char *fmt;
182 	va_list ap;
183 {
184 	if (err_file == 0)
185 		err_set_file((FILE *)0);
186 	fprintf(err_file, "%s: ", __progname);
187 	if (fmt != NULL) {
188 		vfprintf(err_file, fmt, ap);
189 		fprintf(err_file, ": ");
190 	}
191 	fprintf(err_file, "%s\n", strerror(code));
192 }
193 
194 void
195 warnx(const char *fmt, ...)
196 {
197 	va_list ap;
198 	va_start(ap, fmt);
199 	vwarnx(fmt, ap);
200 	va_end(ap);
201 }
202 
203 void
204 vwarnx(fmt, ap)
205 	const char *fmt;
206 	va_list ap;
207 {
208 	if (err_file == 0)
209 		err_set_file((FILE *)0);
210 	fprintf(err_file, "%s: ", __progname);
211 	if (fmt != NULL)
212 		vfprintf(err_file, fmt, ap);
213 	fprintf(err_file, "\n");
214 }
215