lib/libspl/getmntany.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  24  * Copyright 2006 Ricardo Correia.  All rights reserved.
  25  * Use is subject to license terms.
  26  */
  27
  28 /*      Copyright (c) 1988 AT&T */
  29 /*        All Rights Reserved   */
  30
  31 #include <stdio.h>
  32 #include <string.h>
  33 #include <mntent.h>
  34 #include <sys/mnttab.h>
  35
  36 #include <sys/types.h>
  37 #include <sys/stat.h>
  38 #include <unistd.h>
  39
  40 #define BUFSIZE (MNT_LINE_MAX + 2)
  41
  42 __thread char buf[BUFSIZE];
  43
  44 #define DIFF(xx)        ( \
  45             (mrefp->xx != NULL) && \
  46             (mgetp->xx == NULL || strcmp(mrefp->xx, mgetp->xx) != 0))
  47
  48 int
  49 getmntany(FILE *fp, struct mnttab *mgetp, struct mnttab *mrefp)
  50 {
  51         int ret;
  52
  53         while (
  54             ((ret = _sol_getmntent(fp, mgetp)) == 0) && (
  55             DIFF(mnt_special) || DIFF(mnt_mountp) ||
  56             DIFF(mnt_fstype) || DIFF(mnt_mntopts)));
  57
  58         return (ret);
  59 }
  60
  61 int
  62 _sol_getmntent(FILE *fp, struct mnttab *mgetp)
  63 {
  64         struct mntent mntbuf;
  65         struct mntent *ret;
  66
  67         ret = getmntent_r(fp, &mntbuf, buf, BUFSIZE);
  68
  69         if (ret != NULL) {
  70                 mgetp->mnt_special = mntbuf.mnt_fsname;
  71                 mgetp->mnt_mountp = mntbuf.mnt_dir;
  72                 mgetp->mnt_fstype = mntbuf.mnt_type;
  73                 mgetp->mnt_mntopts = mntbuf.mnt_opts;
  74                 return (0);
  75         }
  76
  77         if (feof(fp))
  78                 return (-1);
  79
  80         return (MNT_TOOLONG);
  81 }
  82
  83 int
  84 getextmntent(FILE *fp, struct extmnttab *mp, int len)
  85 {
  86         int ret;
  87         struct stat64 st;
  88
  89         ret = _sol_getmntent(fp, (struct mnttab *) mp);
  90         if (ret == 0) {
  91                 if (stat64(mp->mnt_mountp, &st) != 0) {
  92                         mp->mnt_major = 0;
  93                         mp->mnt_minor = 0;
  94                         return (ret);
  95                 }
  96                 mp->mnt_major = major(st.st_dev);
  97                 mp->mnt_minor = minor(st.st_dev);
  98         }
  99
 100         return (ret);
 101 }