mirror of
https://github.com/sheumann/hush.git
synced 2024-11-13 14:06:21 +00:00
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Utility routines.
|
|
*
|
|
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
|
*
|
|
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
|
*/
|
|
|
|
#include "libbb.h"
|
|
#include <mntent.h>
|
|
|
|
/*
|
|
* Given a block device, find the mount table entry if that block device
|
|
* is mounted.
|
|
*
|
|
* Given any other file (or directory), find the mount table entry for its
|
|
* filesystem.
|
|
*/
|
|
struct mntent *find_mount_point(const char *name, const char *table)
|
|
{
|
|
struct stat s;
|
|
dev_t mountDevice;
|
|
FILE *mountTable;
|
|
struct mntent *mountEntry;
|
|
|
|
if (stat(name, &s) != 0)
|
|
return 0;
|
|
|
|
if ((s.st_mode & S_IFMT) == S_IFBLK)
|
|
mountDevice = s.st_rdev;
|
|
else
|
|
mountDevice = s.st_dev;
|
|
|
|
|
|
mountTable = setmntent(table ? table : bb_path_mtab_file, "r");
|
|
if (!mountTable)
|
|
return 0;
|
|
|
|
while ((mountEntry = getmntent(mountTable)) != 0) {
|
|
if (strcmp(name, mountEntry->mnt_dir) == 0
|
|
|| strcmp(name, mountEntry->mnt_fsname) == 0
|
|
) { /* String match. */
|
|
break;
|
|
}
|
|
if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */
|
|
break;
|
|
if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */
|
|
break;
|
|
}
|
|
endmntent(mountTable);
|
|
return mountEntry;
|
|
}
|