emo/busybox
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Vladimir's last_patch13, containing several bugfixes.

Browse Source
This commit is contained in:
Eric Andersen
2001-06-01 21:47:15 +00:00
parent 4f6753e586
commit 8b113f93b9
7 changed files with 218 additions and 64 deletions
Download Patch File Download Diff File Expand all files Collapse all files

67
libbb/find_root_device.c
View File

@ -1,10 +1,9 @@
/* vi: set sw=4 ts=4: */
/*
* Utility routines.
* Copyright (C) 2000,2001 by Lineo, inc.
* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
*
* 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.
* 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
@ -20,9 +19,6 @@
* 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>
@ -38,45 +34,42 @@ extern char *find_real_root_device_name(const char* name)
DIR *dir;
struct dirent *entry;
struct stat statBuf, rootStat;
char *fileName;
char *fileName = NULL;
dev_t dev;
if (stat("/", &rootStat) != 0) {
if (stat("/", &rootStat) != 0)
perror_msg("could not stat '/'");
return NULL;
}
if ((dev = rootStat.st_rdev)==0) dev=rootStat.st_dev;
else {
if ((dev = rootStat.st_rdev)==0)
dev=rootStat.st_dev;
dir = opendir("/dev");
if (!dir) {
perror_msg("could not open '/dev'");
goto fallback;
}
dir = opendir("/dev");
if (!dir)
perror_msg("could not open '/dev'");
else {
while((entry = readdir(dir)) != NULL) {
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;
/* 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);
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) {
return fileName;
/* 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);
}
free(fileName);
}
closedir(dir);
fallback:
/* don't use stack space, caller expects to free() result */
fileName=xmalloc(20);
sprintf(fileName,"(rdev %u)",(unsigned int) rootStat.st_rdev);
if(fileName==NULL)
fileName=xstrdup("/dev/root");
return fileName;
}