127 lines
2.5 KiB
C
127 lines
2.5 KiB
C
/*
|
|
* 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 <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <stdbool.h>
|
|
#include <dirent.h>
|
|
#include <limits.h>
|
|
#include <fnmatch.h>
|
|
|
|
#include "init.h"
|
|
|
|
static char **patterns;
|
|
static int n_patterns;
|
|
static char buf[PATH_MAX];
|
|
static char buf2[PATH_MAX];
|
|
static unsigned int mode = 0600;
|
|
|
|
static bool find_pattern(const char *name)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < n_patterns; i++)
|
|
if (!fnmatch(patterns[i], name, 0))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static void make_dev(const char *path, bool block, int major, int minor)
|
|
{
|
|
unsigned int oldumask = umask(0);
|
|
unsigned int _mode = mode | (block ? S_IFBLK : S_IFCHR);
|
|
|
|
DEBUG(4, "Creating %s device %s(%d,%d)\n",
|
|
block ? "block" : "character",
|
|
path, major, minor);
|
|
|
|
mknod(path, _mode, makedev(major, minor));
|
|
umask(oldumask);
|
|
}
|
|
|
|
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)
|
|
continue;
|
|
|
|
buf[len] = 0;
|
|
if (!find_pattern(buf))
|
|
continue;
|
|
|
|
c = strrchr(buf, '/');
|
|
if (!c)
|
|
continue;
|
|
|
|
c++;
|
|
make_dev(c, block, major, minor);
|
|
}
|
|
closedir(dir);
|
|
}
|
|
|
|
static char *add_pattern(const char *name)
|
|
{
|
|
char *str = malloc(strlen(name) + 2);
|
|
|
|
str[0] = '*';
|
|
strcpy(str + 1, name);
|
|
return str;
|
|
}
|
|
|
|
int mkdev(const char *name, int _mode)
|
|
{
|
|
char *pattern;
|
|
|
|
if (chdir("/dev"))
|
|
return 1;
|
|
|
|
pattern = add_pattern(name);
|
|
patterns = &pattern;
|
|
mode = _mode;
|
|
n_patterns = 1;
|
|
find_devs(true);
|
|
find_devs(false);
|
|
free(pattern);
|
|
return chdir("/");
|
|
}
|