| /* 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) |
| bb_perror_msg("could not stat '/'"); |
| else { |
| if ((dev = rootStat.st_rdev)==0) |
| dev=rootStat.st_dev; |
| |
| dir = opendir("/dev"); |
| if (!dir) |
| bb_perror_msg("could not open '/dev'"); |
| else { |
| while((entry = readdir(dir)) != NULL) { |
| const char *name = entry->d_name; |
| /* Must skip ".." since that is "/", and so we |
| * would get a false positive on ".." */ |
| if (name[0] == '.' && name[1] == '.' && !name[2]) |
| continue; |
| |
| fileName = concat_path_file("/dev", 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 = bb_xstrdup("/dev/root"); |
| return fileName; |
| } |
| |
| |
| /* END CODE */ |
| /* |
| Local Variables: |
| c-file-style: "linux" |
| c-basic-offset: 4 |
| tab-width: 4 |
| End: |
| */ |