source: MondoRescue/branches/stable/mindi-busybox/libbb/find_mount_point.c @ 821

Last change on this file since 821 was 821, checked in by Bruno Cornec, 14 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 1.3 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Utility routines.
4 *
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
8 */
9
10#include <stdio.h>
11#include <string.h>
12#include "libbb.h"
13
14
15#include <mntent.h>
16/*
17 * Given a block device, find the mount table entry if that block device
18 * is mounted.
19 *
20 * Given any other file (or directory), find the mount table entry for its
21 * filesystem.
22 */
23struct mntent *find_mount_point(const char *name, const char *table)
24{
25    struct stat s;
26    dev_t mountDevice;
27    FILE *mountTable;
28    struct mntent *mountEntry;
29
30    if (stat(name, &s) != 0)
31        return 0;
32
33    if ((s.st_mode & S_IFMT) == S_IFBLK)
34        mountDevice = s.st_rdev;
35    else
36        mountDevice = s.st_dev;
37
38
39    if ((mountTable = setmntent(table ? table : bb_path_mtab_file, "r")) == 0)
40        return 0;
41
42    while ((mountEntry = getmntent(mountTable)) != 0) {
43
44            if(strcmp(name, mountEntry->mnt_dir) == 0
45            || strcmp(name, mountEntry->mnt_fsname) == 0)   /* String match. */
46            break;
47        if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice)  /* Match the device. */
48            break;
49        if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice)  /* Match the directory's mount point. */
50            break;
51    }
52    endmntent(mountTable);
53    return mountEntry;
54}
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