FAT/shell.h at master · seheee/FAT · GitHub

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/******************************************************************************/
/*                                                                            */
/* Project : FAT12/16 File System                                             */
/* File    : shell.h                                                          */
/* Author  : Kyoungmoon Sun(msg2me@msn.com)                                   */
/* Company : Dankook Univ. Embedded System Lab.                               */
/* Notes   : File System test shell header                                    */
/* Date    : 2008/7/2                                                         */
/*                                                                            */
/******************************************************************************/

#ifndef _SHELL_H_
#define _SHELL_H_

#include "disk.h"

typedef struct
{
	unsigned short	year;
	unsigned char	month;
	unsigned char	day;

	unsigned char	hour;
	unsigned char	minute;
	unsigned char	second;
} SHELL_FILETIME;

typedef struct
{
	unsigned char	owner;
	unsigned char	group;
	unsigned char	other;
} SHELL_PERMITION;

typedef struct SHELL_ENTRY
{
	struct SHELL_ENTRY*	parent;

	unsigned char		name[256];
	unsigned char		isDirectory;
	unsigned int		size;

	SHELL_PERMITION		permition;
	SHELL_FILETIME		createTime;
	SHELL_FILETIME		modifyTime;

	/* SHELL_ENTRY would be created frequently.
	 * In that case, dynamic allocation of a private data is not efficient	*/
	char				pdata[1024];
} SHELL_ENTRY;

// SHELL_ENTRY_LIST
typedef struct SHELL_ENTRY_LIST_ITEM
{
	struct SHELL_ENTRY				entry;
	struct SHELL_ENTRY_LIST_ITEM*	next;
} SHELL_ENTRY_LIST_ITEM;

typedef struct
{
	unsigned int					count;
	SHELL_ENTRY_LIST_ITEM*			first;
	SHELL_ENTRY_LIST_ITEM*			last;
} SHELL_ENTRY_LIST;

struct SHELL_FILE_OPERATIONS;

// shell이 전체적인 file system을 관리하기위한 구조체
// pdata : 특정 file system의 정보를 저장
typedef struct SHELL_FS_OPERATIONS
{
	int	( *read_dir )( DISK_OPERATIONS*, struct SHELL_FS_OPERATIONS*, const SHELL_ENTRY*, SHELL_ENTRY_LIST* );
	int	( *stat )( DISK_OPERATIONS*, struct SHELL_FS_OPERATIONS*, unsigned int*, unsigned int* );
	int ( *mkdir )( DISK_OPERATIONS*, struct SHELL_FS_OPERATIONS*, const SHELL_ENTRY*, const char*, SHELL_ENTRY* );
	int ( *rmdir )( DISK_OPERATIONS*, struct SHELL_FS_OPERATIONS*, const SHELL_ENTRY*, const char* );
	int ( *lookup )( DISK_OPERATIONS*, struct SHELL_FS_OPERATIONS*, const SHELL_ENTRY*, SHELL_ENTRY*, const char* );

	struct SHELL_FILE_OPERATIONS*	fileOprs;
	void*	pdata;
} SHELL_FS_OPERATIONS;

typedef struct SHELL_FILE_OPERATIONS
{
	int	( *create )( DISK_OPERATIONS*, SHELL_FS_OPERATIONS*, const SHELL_ENTRY*, const char*, SHELL_ENTRY* );
	int ( *remove )( DISK_OPERATIONS*, SHELL_FS_OPERATIONS*, const SHELL_ENTRY*, const char* );
	int	( *read )( DISK_OPERATIONS*, SHELL_FS_OPERATIONS*, const SHELL_ENTRY*, SHELL_ENTRY*, unsigned long, unsigned long, char* );
	int	( *write )( DISK_OPERATIONS*, SHELL_FS_OPERATIONS*, const SHELL_ENTRY*, SHELL_ENTRY*, unsigned long, unsigned long, const char* );
} SHELL_FILE_OPERATIONS;

typedef struct
{
	char*	name;
	int		( *mount )( DISK_OPERATIONS*, SHELL_FS_OPERATIONS*, SHELL_ENTRY* );
	void	( *umount )( DISK_OPERATIONS*, SHELL_FS_OPERATIONS* );
	int		( *format )( DISK_OPERATIONS*, void* );
} SHELL_FILESYSTEM;

int		init_entry_list( SHELL_ENTRY_LIST* list );
int		add_entry_list( SHELL_ENTRY_LIST*, struct SHELL_ENTRY* );
void	release_entry_list( SHELL_ENTRY_LIST* );

#endif