1 /* $NetBSD: mnttab.c,v 1.2 2010/02/28 17:36:51 haad Exp $ */
2
3 /*-
4 * Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 /*
30 * This file implements Solaris compatible getmntany() and hasmntopt()
31 * functions.
32 */
33
34 #include <sys/cdefs.h>
35 /* __FBSDID("$FreeBSD: src/compat/opensolaris/misc/mnttab.c,v 1.1 2007/04/06 01:08:59 pjd Exp $"); */
36 __RCSID("$NetBSD: mnttab.c,v 1.2 2010/02/28 17:36:51 haad Exp $");
37
38 #include <sys/param.h>
39 #include <sys/statvfs.h>
40 #include <sys/mntent.h>
41
42 #include <stdio.h>
43 #include <string.h>
44 #include <stdlib.h>
45 #include <ctype.h>
46 #include <err.h>
47
48 #include <sys/mnttab.h>
49
50 char *
mntopt(char ** p)51 mntopt(char **p)
52 {
53 char *cp = *p;
54 char *retstr;
55
56 while (*cp && isspace(*cp))
57 cp++;
58
59 retstr = cp;
60 while (*cp && *cp != ',')
61 cp++;
62
63 if (*cp) {
64 *cp = '\0';
65 cp++;
66 }
67
68 *p = cp;
69 return (retstr);
70 }
71
72 char *
hasmntopt(struct mnttab * mnt,char * opt)73 hasmntopt(struct mnttab *mnt, char *opt)
74 {
75 char tmpopts[MNT_LINE_MAX];
76 char *f, *opts = tmpopts;
77
78 if (mnt->mnt_mntopts == NULL)
79 return (NULL);
80 (void) strcpy(opts, mnt->mnt_mntopts);
81 f = mntopt(&opts);
82 for (; *f; f = mntopt(&opts)) {
83 if (strncmp(opt, f, strlen(opt)) == 0)
84 return (f - tmpopts + mnt->mnt_mntopts);
85 }
86 return (NULL);
87 }
88
89 static void
optadd(char * mntopts,size_t size,const char * opt)90 optadd(char *mntopts, size_t size, const char *opt)
91 {
92
93 if (mntopts[0] != '\0')
94 strlcat(mntopts, ",", size);
95 strlcat(mntopts, opt, size);
96 }
97
98 int
getmntany(FILE * fd __unused,struct mnttab * mgetp,struct mnttab * mrefp)99 getmntany(FILE *fd __unused, struct mnttab *mgetp, struct mnttab *mrefp)
100 {
101 static struct statvfs *sfs;
102 static char mntopts[MNTMAXSTR];
103 struct opt *o;
104 static int i, n;
105 int flags;
106
107 if (sfs == NULL) {
108 n = getmntinfo(&sfs, ST_WAIT);
109 if (n == -1)
110 return -1;
111 }
112 for (i = 0; i < n; i++) {
113 if (mrefp->mnt_special != NULL &&
114 strcmp(mrefp->mnt_special, sfs[i].f_mntfromname) != 0) {
115 continue;
116 }
117 if (mrefp->mnt_mountp != NULL &&
118 strcmp(mrefp->mnt_mountp, sfs[i].f_mntonname) != 0) {
119 continue;
120 }
121 if (mrefp->mnt_fstype != NULL &&
122 strcmp(mrefp->mnt_fstype, sfs[i].f_fstypename) != 0) {
123 continue;
124 }
125 flags = sfs[i].f_flag;
126 #define OPTADD(opt) optadd(mntopts, sizeof(mntopts), (opt))
127 if (flags & MNT_RDONLY)
128 OPTADD(MNTOPT_RO);
129 else
130 OPTADD(MNTOPT_RW);
131 if (flags & MNT_NOSUID)
132 OPTADD(MNTOPT_NOSUID);
133 else
134 OPTADD(MNTOPT_SETUID);
135 if (flags & MNT_UPDATE)
136 OPTADD(MNTOPT_REMOUNT);
137 if (flags & MNT_NOATIME)
138 OPTADD(MNTOPT_NOATIME);
139 else
140 OPTADD(MNTOPT_ATIME);
141 OPTADD(MNTOPT_NOXATTR);
142 if (flags & MNT_NOEXEC)
143 OPTADD(MNTOPT_NOEXEC);
144 else
145 OPTADD(MNTOPT_EXEC);
146 #undef OPTADD
147 mgetp->mnt_special = sfs[i].f_mntfromname;
148 mgetp->mnt_mountp = sfs[i].f_mntonname;
149 mgetp->mnt_fstype = sfs[i].f_fstypename;
150 mgetp->mnt_mntopts = mntopts;
151 return (0);
152 }
153 sfs = NULL;
154 return (-1);
155 }
156
157 int
getstatfs(struct statvfs * stat,const char * path)158 getstatfs(struct statvfs *stat, const char *path)
159 {
160 int fs_num, i;
161 struct statvfs *statvfs;
162
163 fs_num = 0;
164
165 if (path == NULL)
166 return (-1);
167
168 fs_num = getvfsstat(NULL, 0, ST_WAIT);
169
170 if ((statvfs = malloc(fs_num * sizeof(struct statvfs))) == NULL)
171 return (-1);
172
173 memset(statvfs, 0, fs_num * sizeof(struct statvfs));
174
175 if (getvfsstat(statvfs, fs_num * sizeof(struct statvfs), ST_WAIT) != 0) {
176 free(statvfs);
177 return (-1);
178 }
179
180 for( i = 0; i < fs_num; i++) {
181
182 if (statvfs[i].f_fstypename != NULL &&
183 strcmp(statvfs[i].f_fstypename, MNTTYPE_ZFS) != 0) {
184 continue;
185 }
186
187 if (statvfs[i].f_mntonname != NULL &&
188 strcmp(statvfs[i].f_mntonname, path) != 0) {
189 continue;
190 }
191
192 memcpy(stat, &statvfs[i], sizeof(struct statvfs));
193 }
194
195 free(statvfs);
196 return (0);
197 }
198
199 int
getmntent(FILE * file,struct mnttab * mnttab)200 getmntent(FILE *file, struct mnttab *mnttab) {
201
202
203 return 1;
204 }
205