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/*
* Copyright (C) 2017-2024 Alibaba Group Holding Limited
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <rtthread.h>
#ifdef RT_USING_DFS
#include <dfs_fs.h>
#include <dfs_romfs.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
static int _copy_file(const char *src, const char *dst)
{
static char buf[2048];
int rfd, wfd, len, ret = 0;
rfd = open(src, O_RDONLY);
if (rfd < 0)
{
return -1;
}
wfd = open(dst, O_WRONLY | O_CREAT | O_TRUNC, 0777);
if (wfd < 0)
{
close(rfd);
return -1;
}
while ((len = read(rfd, buf, sizeof(buf))) > 0)
{
if (write(wfd, buf, len) != len)
{
ret = -1;
break;
}
}
close(rfd);
close(wfd);
return ret;
}
int mnt_init(void)
{
/* FAT on ramdisk as root: the ELF loader needs mmap support */
if (dfs_mkfs("elm", "ramdisk0") != 0)
{
rt_kprintf("mkfs elm on ramdisk0 failed!\n");
return -1;
}
if (dfs_mount("ramdisk0", "/", "elm", 0, 0) != 0)
{
rt_kprintf("elmfat mounted on / failed!\n");
return -1;
}
mkdir("/rom", 0777);
mkdir("/bin", 0777);
mkdir("/etc", 0777);
mkdir("/dev", 0777);
mkdir("/dev/shm", 0777);
/* built-in romfs image holds the user applications */
if (dfs_mount(RT_NULL, "/rom", "rom", 0, &romfs_root) != 0)
{
rt_kprintf("romfs mounted on /rom failed!\n");
return -1;
}
/* copy user applications to the writable root so they can be mmap-ed */
if (_copy_file("/rom/bin/hello", "/bin/hello") != 0)
{
rt_kprintf("no user application in the built-in romfs image\n");
}
rt_kprintf("file system initialization done!\n");
return 0;
}
INIT_ENV_EXPORT(mnt_init);
#endif /* RT_USING_DFS */
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