1 /*-
2 * Copyright (c) 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)getmntopts.c 8.3 (Berkeley) 3/29/95
30 * $FreeBSD: src/sbin/mount/getmntopts.c,v 1.9 1999/10/09 11:54:06 phk Exp $
31 */
32
33 #include <sys/param.h>
34 #include <sys/stat.h>
35
36 #include <err.h>
37 #include <errno.h>
38 #include <mntopts.h>
39 #include <stdlib.h>
40 #include <string.h>
41 #include <sysexits.h>
42
43 int getmnt_silent = 0;
44
45 void
getmntopts(const char * options,const struct mntopt * m0,int * flagp,int * altflagp)46 getmntopts(const char *options, const struct mntopt *m0, int *flagp,
47 int *altflagp)
48 {
49 const struct mntopt *m;
50 int negative;
51 char *opt, *optbuf, *p;
52 int *thisflagp;
53
54 /* Copy option string, since it is about to be torn asunder... */
55 if ((optbuf = strdup(options)) == NULL)
56 err(1, NULL);
57
58 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
59 /* Check for "no" prefix. */
60 if (opt[0] == 'n' && opt[1] == 'o') {
61 negative = 1;
62 opt += 2;
63 } else
64 negative = 0;
65
66 /*
67 * for options with assignments in them (ie. quotas)
68 * ignore the assignment as it's handled elsewhere
69 */
70 p = strchr(opt, '=');
71 if (p)
72 *++p = '\0';
73
74 /* Scan option table. */
75 for (m = m0; m->m_option != NULL; ++m) {
76 if (strcasecmp(opt, m->m_option) == 0)
77 break;
78 }
79
80 /* Save flag, or fail if option is not recognized. */
81 if (m->m_option) {
82 thisflagp = m->m_altloc ? altflagp : flagp;
83 if (negative == m->m_inverse)
84 *thisflagp |= m->m_flag;
85 else
86 *thisflagp &= ~m->m_flag;
87 } else if (!getmnt_silent) {
88 errx(1, "-o %s: option not supported", opt);
89 }
90 }
91
92 free(optbuf);
93 }
94
95 void
rmslashes(char * rrpin,char * rrpout)96 rmslashes(char *rrpin, char *rrpout)
97 {
98 char *rrpoutstart;
99
100 *rrpout = *rrpin;
101 for (rrpoutstart = rrpout; *rrpin != '\0'; *rrpout++ = *rrpin++) {
102
103 /* skip all double slashes */
104 while (*rrpin == '/' && *(rrpin + 1) == '/')
105 rrpin++;
106 }
107
108 /* remove trailing slash if necessary */
109 if (rrpout - rrpoutstart > 1 && *(rrpout - 1) == '/')
110 *(rrpout - 1) = '\0';
111 else
112 *rrpout = '\0';
113 }
114
115 void
checkpath(const char * path,char * resolved)116 checkpath(const char *path, char *resolved)
117 {
118 struct stat sb;
119
120 if (realpath(path, resolved) != NULL && stat(resolved, &sb) == 0) {
121 if (!S_ISDIR(sb.st_mode))
122 errx(EX_USAGE, "%s: not a directory", resolved);
123 } else
124 errx(EX_USAGE, "%s: %s", resolved, strerror(errno));
125 }
126