C语言实现ubi文件系统格式化、创建卷、建立连接、挂载ubi文件系统并给出注释

// C语言实现ubi文件系统格式化、创建卷、建立连接、挂载ubi文件系统的示例代码

#include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <mtd/ubi-user.h>

int main(void) { int fd, ret; struct ubi_mkvol_req mkvol_req; struct ubi_attach_req attach_req; struct ubi_mkvol_resp mkvol_resp; struct ubi_attach_resp attach_resp; char mtd_dev[] = "/dev/mtd0";

// 打开mtd设备
fd = open(mtd_dev, O_RDWR);
if (fd < 0) {
    perror("open");
    exit(EXIT_FAILURE);
}

// 格式化ubi文件系统
ret = ioctl(fd, UBI_IOCMKVOL, &mkvol_req);
if (ret < 0) {
    perror("ioctl UBI_IOCMKVOL");
    exit(EXIT_FAILURE);
}
printf("Volume %d created\n", mkvol_resp.vol_id);

// 创建卷
mkvol_req.vol_type = UBI_DYNAMIC_VOLUME;
mkvol_req.alignment = 1;
mkvol_req.bytes = 64 * 1024 * 1024;
mkvol_req.name_len = sizeof("vol1");
memcpy(mkvol_req.name, "vol1", sizeof("vol1"));
ret = ioctl(fd, UBI_IOCMKVOL, &mkvol_req);
if (ret < 0) {
    perror("ioctl UBI_IOCMKVOL");
    exit(EXIT_FAILURE);
}
printf("Volume %d created\n", mkvol_resp.vol_id);

// 建立连接
attach_req.ubi_num = 0;
attach_req.ubi_version = UBI_VERSION;
ret = ioctl(fd, UBI_IOCATT, &attach_req);
if (ret < 0) {
    perror("ioctl UBI_IOCATT");
    exit(EXIT_FAILURE);
}
printf("UBI device attached\n");

// 挂载ubi文件系统
ret = mount("/dev/ubi0_0", "/mnt/ubi", "ubifs", 0, NULL);
if (ret < 0) {
    perror("mount");
    exit(EXIT_FAILURE);
}
printf("UBI file system mounted\n");

close(fd);
return 0;