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