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77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdio.h>
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#include <string.h>
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#include "libbb.h"
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#include <mntent.h>
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/*
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* Given a block device, find the mount table entry if that block device
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* is mounted.
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*
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* Given any other file (or directory), find the mount table entry for its
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* filesystem.
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*/
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struct mntent *find_mount_point(const char *name, const char *table)
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{
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struct stat s;
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dev_t mountDevice;
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FILE *mountTable;
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struct mntent *mountEntry;
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if (stat(name, &s) != 0)
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return 0;
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if ((s.st_mode & S_IFMT) == S_IFBLK)
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mountDevice = s.st_rdev;
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else
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mountDevice = s.st_dev;
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if ((mountTable = setmntent(table ? table : bb_path_mtab_file, "r")) == 0)
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return 0;
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while ((mountEntry = getmntent(mountTable)) != 0) {
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if(strcmp(name, mountEntry->mnt_dir) == 0
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|| strcmp(name, mountEntry->mnt_fsname) == 0) /* String match. */
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break;
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if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */
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break;
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if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */
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break;
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}
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endmntent(mountTable);
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return mountEntry;
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}
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/* END CODE */
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/*
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Local Variables:
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c-file-style: "linux"
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c-basic-offset: 4
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tab-width: 4
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End:
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*/
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