source: branches/stable/mindi-busybox/libbb/find_root_device.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: 1.4 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 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#include <limits.h>
23#include <stdio.h>
24#include <string.h>
25#include <dirent.h>
26#include <stdlib.h>
27#include "libbb.h"
28
29char *find_block_device(char *path)
30{
31    DIR *dir;
32    struct dirent *entry;
33    struct stat st;
34    dev_t dev;
35    char *retpath=NULL;
36
37    if(stat(path, &st) || !(dir = opendir("/dev"))) return NULL;
38    dev = (st.st_mode & S_IFMT) == S_IFBLK ? st.st_rdev : st.st_dev;
39    while((entry = readdir(dir)) != NULL) {
40        char devpath[PATH_MAX];
41        sprintf(devpath,"/dev/%s", entry->d_name);
42        if(!stat(devpath, &st) && S_ISBLK(st.st_mode) && st.st_rdev == dev) {
43            retpath = bb_xstrdup(devpath);
44            break;
45        }
46    }
47    closedir(dir);
48
49    return retpath;
50}
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