source: src-sh/pbi-manager/mount_nullfs/getmntopts.c @ 7ff5d68

releng/10.0releng/10.0.1releng/10.0.2releng/10.0.3releng/10.1
Last change on this file since 7ff5d68 was 7ff5d68, checked in by Kris Moore <kris@…>, 13 months ago

Rename pbi-manager10 -> pbi-manager for "master" branch

  • Property mode set to 100644
File size: 4.8 KB
Line 
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 * 4. 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
30#if 0
31#ifndef lint
32static char sccsid[] = "@(#)getmntopts.c        8.3 (Berkeley) 3/29/95";
33#endif /* not lint */
34#endif
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD: release/9.1.0/sbin/mount/getmntopts.c 186505 2008-12-26 22:55:38Z obrien $");
37
38#include <sys/param.h>
39#include <sys/mount.h>
40#include <sys/stat.h>
41#include <sys/uio.h>
42
43#include <err.h>
44#include <errno.h>
45#include <stdarg.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <string.h>
49#include <sysexits.h>
50
51#include "mntopts.h"
52
53int getmnt_silent = 0;
54
55void
56getmntopts(const char *options, const struct mntopt *m0, int *flagp,
57        int *altflagp)
58{
59        const struct mntopt *m;
60        int negative, len;
61        char *opt, *optbuf, *p;
62        int *thisflagp;
63
64        /* Copy option string, since it is about to be torn asunder... */
65        if ((optbuf = strdup(options)) == NULL)
66                err(1, NULL);
67
68        for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
69                /* Check for "no" prefix. */
70                if (opt[0] == 'n' && opt[1] == 'o') {
71                        negative = 1;
72                        opt += 2;
73                } else
74                        negative = 0;
75
76                /*
77                 * for options with assignments in them (ie. quotas)
78                 * ignore the assignment as it's handled elsewhere
79                 */
80                p = strchr(opt, '=');
81                if (p != NULL)
82                         *++p = '\0';
83
84                /* Scan option table. */
85                for (m = m0; m->m_option != NULL; ++m) {
86                        len = strlen(m->m_option);
87                        if (strncasecmp(opt, m->m_option, len) == 0)
88                                if (opt[len] == '\0' || opt[len] == '=')
89                                        break;
90                }
91
92                /* Save flag, or fail if option is not recognized. */
93                if (m->m_option) {
94                        thisflagp = m->m_altloc ? altflagp : flagp;
95                        if (negative == m->m_inverse)
96                                *thisflagp |= m->m_flag;
97                        else
98                                *thisflagp &= ~m->m_flag;
99                } else if (!getmnt_silent) {
100                        errx(1, "-o %s: option not supported", opt);
101                }
102        }
103
104        free(optbuf);
105}
106
107void
108rmslashes(char *rrpin, char *rrpout)
109{
110        char *rrpoutstart;
111
112        *rrpout = *rrpin;
113        for (rrpoutstart = rrpout; *rrpin != '\0'; *rrpout++ = *rrpin++) {
114
115                /* skip all double slashes */
116                while (*rrpin == '/' && *(rrpin + 1) == '/')
117                         rrpin++;
118        }
119
120        /* remove trailing slash if necessary */
121        if (rrpout - rrpoutstart > 1 && *(rrpout - 1) == '/')
122                *(rrpout - 1) = '\0';
123        else
124                *rrpout = '\0';
125}
126
127void
128checkpath(const char *path, char *resolved)
129{
130        struct stat sb;
131
132        if (realpath(path, resolved) != NULL && stat(resolved, &sb) == 0) {
133                if (!S_ISDIR(sb.st_mode))
134                        errx(EX_USAGE, "%s: not a directory", resolved);
135        } else
136                errx(EX_USAGE, "%s: %s", resolved, strerror(errno));
137}
138
139void
140build_iovec(struct iovec **iov, int *iovlen, const char *name, void *val,
141            size_t len)
142{
143        int i;
144
145        if (*iovlen < 0)
146                return;
147        i = *iovlen;
148        *iov = realloc(*iov, sizeof **iov * (i + 2));
149        if (*iov == NULL) {
150                *iovlen = -1;
151                return;
152        }
153        (*iov)[i].iov_base = strdup(name);
154        (*iov)[i].iov_len = strlen(name) + 1;
155        i++;
156        (*iov)[i].iov_base = val;
157        if (len == (size_t)-1) {
158                if (val != NULL)
159                        len = strlen(val) + 1;
160                else
161                        len = 0;
162        }
163        (*iov)[i].iov_len = (int)len;
164        *iovlen = ++i;
165}
166
167/*
168 * This function is needed for compatibility with parameters
169 * which used to use the mount_argf() command for the old mount() syscall.
170 */
171void
172build_iovec_argf(struct iovec **iov, int *iovlen, const char *name,
173    const char *fmt, ...)
174{
175        va_list ap;
176        char val[255] = { 0 };
177
178        va_start(ap, fmt);
179        vsnprintf(val, sizeof(val), fmt, ap);
180        va_end(ap);
181        build_iovec(iov, iovlen, name, strdup(val), (size_t)-1);
182}
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