DataMuseum.dk

top - metrics - download

    Length: 2157 (0x86d)
    Types: TextFile
    Notes: UNIX file
    Names: »inode.h«

└─⟦26887b7e0⟧ Bits:30009717 Comet 32 harddisk image
    └─⟦28c352965⟧ »/a« UNIX Filesystem
        └─⟦this⟧ »usr/include/sys/inode.h« 

TextFile

/*
 * @(#)inode.h	3.5	7/14/83
 * @(#)Copyright (C) 1983 by National Semiconductor Corp.
 */

/*
 * file activity in unix. There is a unique
 * inode allocated for each active file,
 * each current directory, each mounted-on
 * file, text file, and the root. An inode is 'named'
 * by its dev/inumber pair. (iget/iget.c)
 * Data, from mode on, is read in
 * from permanent inode on volume.
 */


#define	NADDR	13



struct	inode
{
	char	i_flag;
	char	i_count;	/* reference count */
	dev_t	i_dev;		/* device where inode resides */
	ino_t	i_number;	/* i number, 1-to-1 with device address */
	unsigned short	i_mode;
	short	i_nlink;	/* directory entries */
	short	i_uid;		/* owner */
	short	i_gid;		/* group of owner */
	off_t	i_size;		/* size of file */
	union {
		struct {
			daddr_t I_addr[NADDR];	/* if normal file/directory */
			daddr_t	I_lastr;	/* last logical block read (for read-ahead) */
		} i_f;
#define	i_addr	i_f.I_addr
#define	i_lastr	i_f.I_lastr
		struct	{
			daddr_t	I_rdev;		/* i_addr[0] */
#define	i_rdev	i_d.I_rdev
		} i_d;
	} i_un;
	short	i_hlink;	/* link in hash chain (iget/iput/ifind) */
};


#ifdef	KERNEL
extern struct inode *inode;		/* The inode table itself */
extern struct inode *inodeNINODE;	/* pointer to end of table */
extern int ninode;
#endif

/* flags */
#define	ILOCK	01		/* inode is locked */
#define	IUPD	02		/* file has been modified */
#define	IACC	04		/* inode access time to be updated */
#define	IMOUNT	010		/* inode is mounted on */
#define	IWANT	020		/* some process waiting on lock */
#define	ITEXT	040		/* inode is pure text prototype */
#define	ICHG	0100		/* inode has been changed */
#define IPIPE	0200		/* inode is a pipe */

/* modes */
#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	ISUID	04000		/* set user id on execution */
#define	ISGID	02000		/* set group id on execution */
#define ISVTX	01000		/* save swapped text even after use */
#define	IREAD	0400		/* read, write, execute permissions */
#define	IWRITE	0200
#define	IEXEC	0100