xref: /netbsd/usr.bin/tail/misc.c (revision 6550d01e)
1 /*-
2  * Copyright (c) 1991, 1993
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * This code is derived from software contributed to Berkeley by
6  * Edward Sze-Tyan Wang.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. Neither the name of the University nor the names of its contributors
17  *    may be used to endorse or promote products derived from this software
18  *    without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30  * SUCH DAMAGE.
31  */
32 
33 #include <sys/cdefs.h>
34 #ifndef lint
35 #if 0
36 static char sccsid[] = "@(#)misc.c	8.1 (Berkeley) 6/6/93";
37 #endif
38 __RCSID("$NetBSD: misc.c,v 1.6 2003/08/07 11:16:02 agc Exp $");
39 #endif /* not lint */
40 
41 #include <sys/types.h>
42 #include <sys/stat.h>
43 #include <errno.h>
44 #include <stdarg.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include <unistd.h>
49 
50 #include "extern.h"
51 
52 void
53 ierr(void)
54 {
55 	err(0, "%s: %s", fname, strerror(errno));
56 }
57 
58 void
59 oerr(void)
60 {
61 	err(1, "stdout: %s", strerror(errno));
62 }
63 
64 void
65 err(int fatal, const char *fmt, ...)
66 {
67 	va_list ap;
68 
69 	va_start(ap, fmt);
70 	(void)fprintf(stderr, "tail: ");
71 	(void)vfprintf(stderr, fmt, ap);
72 	va_end(ap);
73 	(void)fprintf(stderr, "\n");
74 	if (fatal)
75 		exit(1);
76 	rval = 1;
77 }
78