external/cddl/osnet/lib/libzfs/mnttab.c

   1 /*      $NetBSD: mnttab.c,v 1.1 2009/03/26 22:11:44 ad 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 1.1 2009/03/26 22:11:44 ad 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 *
  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 *
  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
  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
  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
 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 }