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39 lines
849 B
C
39 lines
849 B
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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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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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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