/*
* Utility routines.
*
- * Copyright (C) tons of folks. Tracking down who wrote what
- * isn't something I'm going to worry about... If you wrote something
- * here, please feel free to acknowledge your work.
+ * 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
* 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
- *
- * Based in part on code from sash, Copyright (c) 1999 by David I. Bell
- * Permission has been granted to redistribute this code under the GPL.
- *
*/
#include <stdio.h>
#include <string.h>
#include <dirent.h>
+#include <stdlib.h>
#include "libbb.h"
-
-
-extern int find_real_root_device_name(char* name)
+extern char *find_block_device(char *path)
{
DIR *dir;
struct dirent *entry;
- struct stat statBuf, rootStat;
- char fileName[BUFSIZ];
-
- if (stat("/", &rootStat) != 0) {
- error_msg("could not stat '/'");
- return( FALSE);
- }
-
- dir = opendir("/dev");
- if (!dir) {
- error_msg("could not open '/dev'");
- return( FALSE);
- }
+ 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) {
-
- /* Must skip ".." since that is "/", and so we
- * would get a false positive on ".." */
- if (strcmp(entry->d_name, "..") == 0)
- continue;
-
- snprintf( fileName, strlen(name)+1, "/dev/%s", entry->d_name);
-
- if (stat(fileName, &statBuf) != 0)
- continue;
- /* Some char devices have the same dev_t as block
- * devices, so make sure this is a block device */
- if (! S_ISBLK(statBuf.st_mode))
- continue;
- if (statBuf.st_rdev == rootStat.st_rdev) {
- strcpy(name, fileName);
- return ( TRUE);
+ 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( FALSE);
+ return retpath;
}
-
-
-/* END CODE */
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/