toaruos/kernel/include/fs.h
2012-02-05 16:04:41 -06:00

92 lines
2.9 KiB
C

/* vim: tabstop=4 shiftwidth=4 noexpandtab
*/
#ifndef FS_H
#define FS_H
#define PATH_SEPARATOR '/'
#define PATH_SEPARATOR_STRING "/"
#define PATH_UP ".."
#define PATH_DOT "."
#define FS_FILE 0x01
#define FS_DIRECTORY 0x02
#define FS_CHARDEVICE 0x04
#define FS_BLOCKDEVICE 0x08
#define FS_PIPE 0x10
#define FS_SYMLINK 0x20
#define FS_MOUNTPOINT 0x40
#define _IFMT 0170000 /* type of file */
#define _IFDIR 0040000 /* directory */
#define _IFCHR 0020000 /* character special */
#define _IFBLK 0060000 /* block special */
#define _IFREG 0100000 /* regular */
#define _IFLNK 0120000 /* symbolic link */
#define _IFSOCK 0140000 /* socket */
#define _IFIFO 0010000 /* fifo */
struct fs_node;
typedef uint32_t (*read_type_t) (struct fs_node *, uint32_t, uint32_t, uint8_t *);
typedef uint32_t (*write_type_t) (struct fs_node *, uint32_t, uint32_t, uint8_t *);
typedef void (*open_type_t) (struct fs_node *, uint8_t read, uint8_t write);
typedef void (*close_type_t) (struct fs_node *);
typedef struct dirent *(*readdir_type_t) (struct fs_node *, uint32_t);
typedef struct fs_node *(*finddir_type_t) (struct fs_node *, char *name);
typedef void (*create_type_t) (struct fs_node *, char *name, uint16_t permission);
typedef void (*mkdir_type_t) (struct fs_node *, char *name, uint16_t permission);
typedef struct fs_node {
char name[256]; // The filename.
uint32_t mask; // The permissions mask.
uint32_t uid; // The owning user.
uint32_t gid; // The owning group.
uint32_t flags; // Flags (node type, etc).
uint32_t inode; // Inode number.
uint32_t length; // Size of the file, in byte.
uint32_t impl; // Used to keep track which fs it belongs to.
read_type_t read;
write_type_t write;
open_type_t open;
close_type_t close;
readdir_type_t readdir;
finddir_type_t finddir;
create_type_t create;
mkdir_type_t mkdir;
struct fs_node *ptr; // Used by mountpoints and symlinks.
uint32_t offset;
} fs_node_t;
struct dirent {
uint32_t ino; // Inode number.
char name[256]; // The filename.
};
struct stat {
uint16_t st_dev;
uint16_t st_ino;
uint32_t st_mode;
uint16_t st_nlink;
uint16_t st_uid;
uint16_t st_gid;
uint16_t st_rdev;
uint32_t st_size;
};
extern fs_node_t *fs_root;
extern fs_node_t * null_device_create();
uint32_t read_fs(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer);
uint32_t write_fs(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer);
void open_fs(fs_node_t *node, uint8_t read, uint8_t write);
void close_fs(fs_node_t *node);
struct dirent *readdir_fs(fs_node_t *node, uint32_t index);
fs_node_t *finddir_fs(fs_node_t *node, char *name);
int mkdir_fs(char *name, uint16_t permission);
int create_file_fs(char *name, uint16_t permission);
fs_node_t *kopen(char *filename, uint32_t flags);
char *canonicalize_path(char *cwd, char *input);
fs_node_t *clone_fs(fs_node_t * source);
#endif