3c6bfe3e33
find_root_device.c. (We #include it in busybox.h but not libbb.h, it seems. Someday, someone's going to have to clarify for me the difference between those two...)
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Utility routines.
|
|
*
|
|
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <limits.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <dirent.h>
|
|
#include <stdlib.h>
|
|
#include "libbb.h"
|
|
|
|
extern char *find_block_device(char *path)
|
|
{
|
|
DIR *dir;
|
|
struct dirent *entry;
|
|
struct stat st;
|
|
dev_t dev;
|
|
char *retpath=NULL;
|
|
|
|
if(stat(path, &st) || !(dir = opendir("/dev"))) return NULL;
|
|
dev = (st.st_mode & S_IFMT) == S_IFBLK ? st.st_rdev : st.st_dev;
|
|
while((entry = readdir(dir)) != NULL) {
|
|
char devpath[PATH_MAX];
|
|
sprintf(devpath,"/dev/%s", entry->d_name);
|
|
if(!stat(devpath, &st) && S_ISBLK(st.st_mode) && st.st_rdev == dev) {
|
|
retpath = bb_xstrdup(devpath);
|
|
break;
|
|
}
|
|
}
|
|
closedir(dir);
|
|
|
|
return retpath;
|
|
}
|