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/*
* Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
* Copyright (C) 2013 John Crispin <blogic@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation
*
* 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.
*/
#define _DEFAULT_SOURCE
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/sysmacros.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdbool.h>
#include <dirent.h>
#include <limits.h>
#include <fnmatch.h>
#include "libblkid-tiny.h"
#include <syslog.h>
static char buf[PATH_MAX + 1];
static char buf2[PATH_MAX];
static unsigned int mode = 0600;
static void make_dev(const char *path, bool block, int major, int minor)
{
unsigned int _mode = mode | (block ? S_IFBLK : S_IFCHR);
mknod(path, _mode, makedev(major, minor));
}
static void find_devs(bool block)
{
char *path = block ? "/sys/dev/block" : "/sys/dev/char";
struct dirent *dp;
DIR *dir;
dir = opendir(path);
if (!dir)
return;
path = buf2 + sprintf(buf2, "%s/", path);
while ((dp = readdir(dir)) != NULL) {
char *c;
int major = 0, minor = 0;
int len;
if (dp->d_type != DT_LNK)
continue;
if (sscanf(dp->d_name, "%d:%d", &major, &minor) != 2)
continue;
strcpy(path, dp->d_name);
len = readlink(buf2, buf, sizeof(buf));
if (len <= 0 || len == sizeof(buf))
continue;
buf[len] = 0;
c = strrchr(buf, '/');
if (!c)
continue;
c++;
make_dev(c, block, major, minor);
}
closedir(dir);
}
int mkblkdev(void)
{
if (chdir("/dev"))
return 1;
mode = 0600;
find_devs(true);
return chdir("/");
}
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