| Eric Andersen | aad1a88 | 2001-03-16 22:47:14 +0000 | [diff] [blame^] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * Utility routines. |
| 4 | * |
| 5 | * Copyright (C) tons of folks. Tracking down who wrote what |
| 6 | * isn't something I'm going to worry about... If you wrote something |
| 7 | * here, please feel free to acknowledge your work. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | * |
| 23 | * Based in part on code from sash, Copyright (c) 1999 by David I. Bell |
| 24 | * Permission has been granted to redistribute this code under the GPL. |
| 25 | * |
| 26 | */ |
| 27 | |
| 28 | #include <stdio.h> |
| 29 | #include <string.h> |
| 30 | #include <dirent.h> |
| 31 | #include "libbb.h" |
| 32 | |
| 33 | |
| 34 | |
| 35 | extern int find_real_root_device_name(char* name) |
| 36 | { |
| 37 | DIR *dir; |
| 38 | struct dirent *entry; |
| 39 | struct stat statBuf, rootStat; |
| 40 | char fileName[BUFSIZ]; |
| 41 | |
| 42 | if (stat("/", &rootStat) != 0) { |
| 43 | error_msg("could not stat '/'"); |
| 44 | return( FALSE); |
| 45 | } |
| 46 | |
| 47 | dir = opendir("/dev"); |
| 48 | if (!dir) { |
| 49 | error_msg("could not open '/dev'"); |
| 50 | return( FALSE); |
| 51 | } |
| 52 | |
| 53 | while((entry = readdir(dir)) != NULL) { |
| 54 | |
| 55 | /* Must skip ".." since that is "/", and so we |
| 56 | * would get a false positive on ".." */ |
| 57 | if (strcmp(entry->d_name, "..") == 0) |
| 58 | continue; |
| 59 | |
| 60 | snprintf( fileName, strlen(name)+1, "/dev/%s", entry->d_name); |
| 61 | |
| 62 | if (stat(fileName, &statBuf) != 0) |
| 63 | continue; |
| 64 | /* Some char devices have the same dev_t as block |
| 65 | * devices, so make sure this is a block device */ |
| 66 | if (! S_ISBLK(statBuf.st_mode)) |
| 67 | continue; |
| 68 | if (statBuf.st_rdev == rootStat.st_rdev) { |
| 69 | strcpy(name, fileName); |
| 70 | return ( TRUE); |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | return( FALSE); |
| 75 | } |
| 76 | |
| 77 | |
| 78 | /* END CODE */ |
| 79 | /* |
| 80 | Local Variables: |
| 81 | c-file-style: "linux" |
| 82 | c-basic-offset: 4 |
| 83 | tab-width: 4 |
| 84 | End: |
| 85 | */ |