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/* |
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* Copyright (c) 1989, 1990 Jan-Simon Pendry |
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* Copyright (c) 1989, 1990 Imperial College of Science, Technology & Medicine |
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* Copyright (c) 1989, 1990, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* This code is derived from software contributed to Berkeley by |
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* Jan-Simon Pendry at Imperial College, London. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* from: @(#)mtab.c 8.1 (Berkeley) 6/6/93 |
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* $Id: mtab.c,v 1.7 2014/10/20 06:55:59 guenther Exp $ |
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*/ |
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#include "am.h" |
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/* |
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* Firewall /etc/mtab entries |
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*/ |
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void |
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mnt_free(struct mntent *mp) |
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{ |
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free(mp->mnt_fsname); |
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free(mp->mnt_dir); |
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free(mp->mnt_type); |
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free(mp->mnt_opts); |
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free(mp); |
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} |
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/* |
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* Discard memory allocated for mount list |
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*/ |
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void |
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discard_mntlist(mntlist *mp) |
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{ |
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mntlist *mp2; |
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while ((mp2 = mp)) { |
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mp = mp->mnext; |
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if (mp2->mnt) |
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mnt_free(mp2->mnt); |
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free(mp2); |
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} |
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} |
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/* |
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* Throw away a mount list |
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*/ |
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void |
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free_mntlist(mntlist *mp) |
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{ |
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discard_mntlist(mp); |
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} |
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/* |
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* Utility routine which determines the value of a |
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* numeric option in the mount options (such as port=%d). |
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* Returns 0 if the option is not specified. |
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*/ |
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int |
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hasmntval(struct mntent *mnt, char *opt) |
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{ |
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char *str = hasmntopt(mnt, opt); |
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if (str) { |
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char *eq = strchr(str, '='); |
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if (eq) |
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return atoi(eq+1); |
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else |
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plog(XLOG_USER, "bad numeric option \"%s\" in \"%s\"", opt, str); |
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} |
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return 0; |
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} |
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static struct mntent * |
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mnt_dup(struct statfs *mp) |
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{ |
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struct mntent *new_mp = ALLOC(mntent); |
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new_mp->mnt_fsname = strdup(mp->f_mntfromname); |
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new_mp->mnt_dir = strdup(mp->f_mntonname); |
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new_mp->mnt_type = strdup(mp->f_fstypename); |
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new_mp->mnt_opts = strdup("unset"); |
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new_mp->mnt_freq = 0; |
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new_mp->mnt_passno = 0; |
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return new_mp; |
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} |
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/* |
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* Read a mount table into memory |
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*/ |
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mntlist * |
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read_mtab(char *fs) |
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{ |
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mntlist **mpp, *mhp; |
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struct statfs *mntbufp, *mntp; |
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int nloc = getmntinfo(&mntbufp, MNT_NOWAIT); |
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if (nloc == 0) { |
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plog(XLOG_ERROR, "Can't read mount table"); |
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return 0; |
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} |
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mpp = &mhp; |
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for (mntp = mntbufp; mntp < mntbufp + nloc; mntp++) { |
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/* |
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* Allocate a new slot |
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*/ |
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*mpp = ALLOC(mntlist); |
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/* |
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* Copy the data returned by getmntent |
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*/ |
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(*mpp)->mnt = mnt_dup(mntp); |
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/* |
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* Move to next pointer |
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*/ |
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mpp = &(*mpp)->mnext; |
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} |
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/* |
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* Terminate the list |
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*/ |
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*mpp = 0; |
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return mhp; |
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} |