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Eric Andersenaad1a882001-03-16 22:47:14 +00001/* vi: set sw=4 ts=4: */
2/*
Eric Andersenbdfd0d72001-10-24 05:00:29 +00003 * Utility routines.
Eric Andersenaad1a882001-03-16 22:47:14 +00004 *
Eric Andersenbdfd0d72001-10-24 05:00:29 +00005 * Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
6 * Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.org>
Eric Andersen8b113f92001-06-01 21:47:15 +00007 * Patched by a bunch of people. Feel free to acknowledge your work.
Eric Andersenaad1a882001-03-16 22:47:14 +00008 *
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
Eric Andersenaad1a882001-03-16 22:47:14 +000022 */
23
24#include <stdio.h>
25#include <string.h>
26#include <dirent.h>
Eric Andersenc911a432001-05-15 17:42:16 +000027#include <stdlib.h>
Eric Andersenaad1a882001-03-16 22:47:14 +000028#include "libbb.h"
29
30
31
Eric Andersenc911a432001-05-15 17:42:16 +000032extern char *find_real_root_device_name(const char* name)
Eric Andersenaad1a882001-03-16 22:47:14 +000033{
34 DIR *dir;
35 struct dirent *entry;
36 struct stat statBuf, rootStat;
Eric Andersen8b113f92001-06-01 21:47:15 +000037 char *fileName = NULL;
Matt Kraai774d1352001-05-23 14:45:09 +000038 dev_t dev;
Eric Andersenaad1a882001-03-16 22:47:14 +000039
Eric Andersen8b113f92001-06-01 21:47:15 +000040 if (stat("/", &rootStat) != 0)
Manuel Novoa III cad53642003-03-19 09:13:01 +000041 bb_perror_msg("could not stat '/'");
Eric Andersen8b113f92001-06-01 21:47:15 +000042 else {
43 if ((dev = rootStat.st_rdev)==0)
44 dev=rootStat.st_dev;
Eric Andersenaad1a882001-03-16 22:47:14 +000045
Eric Andersen8b113f92001-06-01 21:47:15 +000046 dir = opendir("/dev");
47 if (!dir)
Manuel Novoa III cad53642003-03-19 09:13:01 +000048 bb_perror_msg("could not open '/dev'");
Eric Andersen8b113f92001-06-01 21:47:15 +000049 else {
50 while((entry = readdir(dir)) != NULL) {
Eric Andersenaad1a882001-03-16 22:47:14 +000051
Glenn L McGrath393183d2003-05-26 14:07:50 +000052 fileName = concat_subpath_file("/dev", entry->d_name);
53 if(fileName == NULL)
Eric Andersen8b113f92001-06-01 21:47:15 +000054 continue;
Eric Andersenaad1a882001-03-16 22:47:14 +000055
Eric Andersen8b113f92001-06-01 21:47:15 +000056 /* Some char devices have the same dev_t as block
57 * devices, so make sure this is a block device */
58 if (stat(fileName, &statBuf) == 0 &&
59 S_ISBLK(statBuf.st_mode)!=0 &&
60 statBuf.st_rdev == dev)
61 break;
62 free(fileName);
63 fileName=NULL;
64 }
65 closedir(dir);
Eric Andersenaad1a882001-03-16 22:47:14 +000066 }
67 }
Eric Andersen8b113f92001-06-01 21:47:15 +000068 if(fileName==NULL)
Manuel Novoa III cad53642003-03-19 09:13:01 +000069 fileName=bb_xstrdup("/dev/root");
Matt Kraai774d1352001-05-23 14:45:09 +000070 return fileName;
Eric Andersenaad1a882001-03-16 22:47:14 +000071}
72
73
74/* END CODE */
75/*
76Local Variables:
77c-file-style: "linux"
78c-basic-offset: 4
79tab-width: 4
80End:
81*/