utils.c revision 302408 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright (c) 1998-2001 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include <string.h>
30#include <stdlib.h>
31#include <stdarg.h>
32#include <stdio.h>
33#include <errno.h>
34
35#include "utils.h"
36
37/*LINTLIBRARY*/
38
39static const char *pname;
40
41#pragma init(getpname)
42const char *
43getpname(void)
44{
45	const char *p, *q;
46
47	if (pname != NULL)
48		return (pname);
49
50	if ((p = getexecname()) != NULL)
51		q = strrchr(p, '/');
52	else
53		q = NULL;
54
55	if (q == NULL)
56		pname = p;
57	else
58		pname = q + 1;
59
60	return (pname);
61}
62
63void
64vwarn(const char *format, va_list alist)
65{
66	int err = errno;
67
68	if (pname != NULL)
69		(void) fprintf(stderr, "%s: ", pname);
70
71	(void) vfprintf(stderr, format, alist);
72
73	if (strchr(format, '\n') == NULL)
74		(void) fprintf(stderr, ": %s\n", strerror(err));
75}
76
77/*PRINTFLIKE1*/
78void
79warn(const char *format, ...)
80{
81	va_list alist;
82
83	va_start(alist, format);
84	vwarn(format, alist);
85	va_end(alist);
86}
87
88void
89vdie(const char *format, va_list alist)
90{
91	vwarn(format, alist);
92	exit(E_ERROR);
93}
94
95/*PRINTFLIKE1*/
96void
97die(const char *format, ...)
98{
99	va_list alist;
100
101	va_start(alist, format);
102	vdie(format, alist);
103	va_end(alist);
104}
105