51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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#include <dirent.h>
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#include <stdlib.h>
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#include "libbb.h"
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char *find_block_device(char *path)
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{
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DIR *dir;
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struct dirent *entry;
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struct stat st;
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dev_t dev;
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char *retpath=NULL;
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if(stat(path, &st) || !(dir = opendir("/dev"))) return NULL;
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dev = (st.st_mode & S_IFMT) == S_IFBLK ? st.st_rdev : st.st_dev;
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while((entry = readdir(dir)) != NULL) {
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char devpath[PATH_MAX];
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sprintf(devpath,"/dev/%s", entry->d_name);
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if(!stat(devpath, &st) && S_ISBLK(st.st_mode) && st.st_rdev == dev) {
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retpath = bb_xstrdup(devpath);
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break;
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}
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}
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closedir(dir);
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return retpath;
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}
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