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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #include <sys/types.h>
27 #include <sys/param.h>
28 #include <sys/stat.h>
29 #include <sys/statvfs.h>
30 #include <sys/sysmacros.h>
31 #include <libintl.h>
32 #include <string.h>
33 #include <stdlib.h>
34 #include <stdarg.h>
35 #include <stdio.h>
36 #include <errno.h>
37 #include <dlfcn.h>
38 #include <link.h>
39
40 #include "utils.h"
41
42 static void *lib_hdl = NULL;
43
44 static const char PNAME_FMT[] = "%s: ";
45 static const char ERRNO_FMT[] = ": %s\n";
46
47 static const char *pname;
48
49 /*PRINTFLIKE1*/
50 void
warn(const char * format,...)51 warn(const char *format, ...)
52 {
53 int err = errno;
54 va_list alist;
55
56 if (pname != NULL)
57 (void) fprintf(stderr, gettext(PNAME_FMT), pname);
58
59 va_start(alist, format);
60 (void) vfprintf(stderr, format, alist);
61 va_end(alist);
62
63 if (strchr(format, '\n') == NULL)
64 (void) fprintf(stderr, gettext(ERRNO_FMT), strerror(err));
65 }
66
67 /*PRINTFLIKE1*/
68 void
die(const char * format,...)69 die(const char *format, ...)
70 {
71 int err = errno;
72 va_list alist;
73
74 if (pname != NULL)
75 (void) fprintf(stderr, gettext(PNAME_FMT), pname);
76
77 va_start(alist, format);
78 (void) vfprintf(stderr, format, alist);
79 va_end(alist);
80
81 if (strchr(format, '\n') == NULL)
82 (void) fprintf(stderr, gettext(ERRNO_FMT), strerror(err));
83 exit(E_ERROR);
84 }
85
86 const char *
getpname(const char * arg0)87 getpname(const char *arg0)
88 {
89 const char *p = strrchr(arg0, '/');
90
91 if (p == NULL)
92 p = arg0;
93 else
94 p++;
95
96 pname = p;
97 return (p);
98 }
99
100 int
valid_abspath(const char * p)101 valid_abspath(const char *p)
102 {
103 if (p[0] != '/') {
104 warn(gettext("pathname is not an absolute path -- %s\n"), p);
105 return (0);
106 }
107
108 if (strlen(p) > MAXPATHLEN) {
109 warn(gettext("pathname is too long -- %s\n"), p);
110 return (0);
111 }
112
113 return (1);
114 }
115
116 /*
117 * Wrapper for dlopen'ing a library.
118 * The caller must call closelib() once
119 * access to the library is no longer needed.
120 */
121 void *
openlib(const char * lib)122 openlib(const char *lib)
123 {
124 lib_hdl = dlopen(lib, RTLD_LAZY);
125 return (lib_hdl);
126 }
127
128 void
closelib()129 closelib()
130 {
131 if (lib_hdl != NULL)
132 (void) dlclose(lib_hdl);
133 }
134