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66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
#pragma once
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#include <libc/sys/types.h>
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/**
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* @brief 目录项的属性（copy from vfs.h）
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*
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*/
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#define VFS_ATTR_FILE (1UL << 0)
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#define VFS_ATTR_DIR (1UL << 1)
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#define VFS_ATTR_DEVICE (1UL << 2)
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#define DIR_BUF_SIZE 256
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/**
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* @brief 文件夹结构体
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*
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*/
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struct DIR
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{
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int fd;
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int buf_pos;
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int buf_len;
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char buf[DIR_BUF_SIZE];
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// todo: 加一个指向dirent结构体的指针
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};
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struct dirent
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{
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ino_t d_ino; // 文件序列号
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off_t d_off; // dir偏移量
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unsigned short d_reclen; // 目录下的记录数
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unsigned char d_type; // entry的类型
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char d_name[]; // 文件entry的名字(是一个零长数组)
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};
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/**
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* @brief 打开文件夹
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*
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* @param dirname
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* @return DIR*
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*/
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struct DIR *opendir(const char *dirname);
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/**
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* @brief 关闭文件夹
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*
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* @param dirp DIR结构体指针
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* @return int 成功：0， 失败：-1
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+--------+--------------------------------+
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| errno | 描述 |
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+--------+--------------------------------+
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| 0 | 成功 |
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| -EBADF | 当前dirp不指向一个打开了的目录 |
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| -EINTR | 函数执行期间被信号打断 |
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+--------+--------------------------------+
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*/
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int closedir(struct DIR *dirp);
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/**
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* @brief 从目录中读取数据
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*
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* @param dir
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* @return struct dirent*
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*/
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struct dirent* readdir(struct DIR* dir); |