xref: /dragonfly/lib/libc/gen/err.c (revision 1e846160)
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  * $FreeBSD: src/lib/libc/gen/err.c,v 1.6 1999/08/27 23:58:33 peter Exp $
35  * $DragonFly: src/lib/libc/gen/err.c,v 1.5 2006/02/12 21:14:11 dillon Exp $
36  */
37 
38 #include <sys/cdefs.h>
39 #include <err.h>
40 #include <errno.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 
45 #include <stdarg.h>
46 
47 
48 static FILE *err_file; /* file to use for error output */
49 static void (*err_exit)(int);
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
57 err_set_file(void *fp)
58 {
59 	if (fp)
60 		err_file = fp;
61 	else
62 		err_file = stderr;
63 }
64 
65 void
66 err_set_exit(void (*ef)(int))
67 {
68 	err_exit = ef;
69 }
70 
71 void
72 err(int eval, const char *fmt, ...)
73 {
74 	va_list ap;
75 	va_start(ap, fmt);
76 	verrc(eval, errno, fmt, ap);
77 	va_end(ap);
78 }
79 
80 void
81 verr(int eval, const char *fmt, va_list ap)
82 {
83 	verrc(eval, errno, fmt, ap);
84 }
85 
86 void
87 errc(int eval, int code, const char *fmt, ...)
88 {
89 	va_list ap;
90 	va_start(ap, fmt);
91 	verrc(eval, code, fmt, ap);
92 	va_end(ap);
93 }
94 
95 void
96 verrc(int eval, int code, const char *fmt, va_list ap)
97 {
98 	if (err_file == 0)
99 		err_set_file((FILE *)0);
100 	fprintf(err_file, "%s: ", getprogname());
101 	if (fmt != NULL) {
102 		vfprintf(err_file, fmt, ap);
103 		fprintf(err_file, ": ");
104 	}
105 	fprintf(err_file, "%s\n", strerror(code));
106 	if (err_exit)
107 		err_exit(eval);
108 	exit(eval);
109 }
110 
111 void
112 errx(int eval, const char *fmt, ...)
113 {
114 	va_list ap;
115 	va_start(ap, fmt);
116 	verrx(eval, fmt, ap);
117 	va_end(ap);
118 }
119 
120 void
121 verrx(int eval, const char *fmt, va_list ap)
122 {
123 	if (err_file == 0)
124 		err_set_file((FILE *)0);
125 	fprintf(err_file, "%s: ", getprogname());
126 	if (fmt != NULL)
127 		vfprintf(err_file, fmt, ap);
128 	fprintf(err_file, "\n");
129 	if (err_exit)
130 		err_exit(eval);
131 	exit(eval);
132 }
133 
134 void
135 _warn(const char *fmt, ...)
136 {
137 	va_list ap;
138 	va_start(ap, fmt);
139 	vwarnc(errno, fmt, ap);
140 	va_end(ap);
141 }
142 __weak_reference(_warn,warn);
143 
144 void
145 vwarn(const char *fmt, va_list ap)
146 {
147 	vwarnc(errno, fmt, ap);
148 }
149 
150 void
151 warnc(int code, const char *fmt, ...)
152 {
153 	va_list ap;
154 	va_start(ap, fmt);
155 	vwarnc(code, fmt, ap);
156 	va_end(ap);
157 }
158 
159 void
160 vwarnc(int code, const char *fmt, va_list ap)
161 {
162 	if (err_file == 0)
163 		err_set_file((FILE *)0);
164 	fprintf(err_file, "%s: ", getprogname());
165 	if (fmt != NULL) {
166 		vfprintf(err_file, fmt, ap);
167 		fprintf(err_file, ": ");
168 	}
169 	fprintf(err_file, "%s\n", strerror(code));
170 }
171 
172 void
173 warnx(const char *fmt, ...)
174 {
175 	va_list ap;
176 	va_start(ap, fmt);
177 	vwarnx(fmt, ap);
178 	va_end(ap);
179 }
180 
181 void
182 vwarnx(const char *fmt, va_list ap)
183 {
184 	if (err_file == 0)
185 		err_set_file((FILE *)0);
186 	fprintf(err_file, "%s: ", getprogname());
187 	if (fmt != NULL)
188 		vfprintf(err_file, fmt, ap);
189 	fprintf(err_file, "\n");
190 }
191