mirror of
https://github.com/topjohnwu/ndk-busybox.git
synced 2024-11-25 12:49:54 +00:00
85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Utility routines.
|
|
*
|
|
* Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
|
|
* Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.org>
|
|
* Patched by a bunch of people. Feel free to acknowledge your work.
|
|
*
|
|
* 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 <stdio.h>
|
|
#include <string.h>
|
|
#include <dirent.h>
|
|
#include <stdlib.h>
|
|
#include "libbb.h"
|
|
|
|
|
|
|
|
extern char *find_real_root_device_name(const char* name)
|
|
{
|
|
DIR *dir;
|
|
struct dirent *entry;
|
|
struct stat statBuf, rootStat;
|
|
char *fileName = NULL;
|
|
dev_t dev;
|
|
|
|
if (stat("/", &rootStat) != 0)
|
|
perror_msg("could not stat '/'");
|
|
else {
|
|
if ((dev = rootStat.st_rdev)==0)
|
|
dev=rootStat.st_dev;
|
|
|
|
dir = opendir("/dev");
|
|
if (!dir)
|
|
perror_msg("could not open '/dev'");
|
|
else {
|
|
while((entry = readdir(dir)) != NULL) {
|
|
|
|
/* Must skip ".." since that is "/", and so we
|
|
* would get a false positive on ".." */
|
|
if (strcmp(entry->d_name, "..") == 0)
|
|
continue;
|
|
|
|
fileName = concat_path_file("/dev", entry->d_name);
|
|
|
|
/* Some char devices have the same dev_t as block
|
|
* devices, so make sure this is a block device */
|
|
if (stat(fileName, &statBuf) == 0 &&
|
|
S_ISBLK(statBuf.st_mode)!=0 &&
|
|
statBuf.st_rdev == dev)
|
|
break;
|
|
free(fileName);
|
|
fileName=NULL;
|
|
}
|
|
closedir(dir);
|
|
}
|
|
}
|
|
if(fileName==NULL)
|
|
fileName=xstrdup("/dev/root");
|
|
return fileName;
|
|
}
|
|
|
|
|
|
/* END CODE */
|
|
/*
|
|
Local Variables:
|
|
c-file-style: "linux"
|
|
c-basic-offset: 4
|
|
tab-width: 4
|
|
End:
|
|
*/
|