1 /* $NetBSD: hasmntopt.c,v 1.1.1.3 2015/01/17 16:34:18 christos Exp $ */
2
3 /*
4 * Copyright (c) 1997-2014 Erez Zadok
5 * Copyright (c) 1990 Jan-Simon Pendry
6 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
7 * Copyright (c) 1990 The Regents of the University of California.
8 * All rights reserved.
9 *
10 * This code is derived from software contributed to Berkeley by
11 * Jan-Simon Pendry at Imperial College, London.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 n * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 *
38 * File: am-utils/libamu/hasmntopt.c
39 *
40 */
41
42 #ifdef HAVE_CONFIG_H
43 # include <config.h>
44 #endif /* HAVE_CONFIG_H */
45 #include <am_defs.h>
46 #include <amu.h>
47
48 #ifndef MNTMAXSTR
49 # define MNTMAXSTR 256
50 #endif /* not MNTMAXSTR */
51
52
53 /*
54 * Some systems don't provide these to the user,
55 * but amd needs them, so...
56 *
57 * From: Piete Brooks <pb@cl.cam.ac.uk>
58 */
59 static char *
nextmntopt(char ** p)60 nextmntopt(char **p)
61 {
62 char *cp = *p;
63 char *rp;
64
65 /*
66 * Skip past white space
67 */
68 while (*cp && isspace((unsigned char) *cp))
69 cp++;
70
71 /*
72 * Word starts here
73 */
74 rp = cp;
75
76 /*
77 * Scan to send of string or separator
78 */
79 while (*cp && *cp != ',')
80 cp++;
81
82 /*
83 * If separator found the overwrite with null char.
84 */
85 if (*cp) {
86 *cp = '\0';
87 cp++;
88 }
89
90 /*
91 * Return value for next call
92 */
93 *p = cp;
94 return rp;
95 }
96
97
98 /*
99 * replacement for hasmntopt if the system does not have it.
100 */
101 char *
amu_hasmntopt(mntent_t * mnt,char * opt)102 amu_hasmntopt(mntent_t *mnt, char *opt)
103 {
104 char t[MNTMAXSTR];
105 char *f;
106 char *o = t;
107 size_t l = strlen(opt);
108
109 xstrlcpy(t, mnt->mnt_opts, sizeof(t));
110
111 while (*(f = nextmntopt(&o)))
112 if (NSTREQ(opt, f, l))
113 return f - t + mnt->mnt_opts;
114
115 return 0;
116 }
117