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Length: 2049 (0x801)
Types: TextFile
Notes: UNIX file
Names: »filsys.h«
└─⟦f27320a65⟧ Bits:30001972 Commodore 900 hard disk image with partial source code
└─⟦2d53db1df⟧ UNIX Filesystem
└─⟦this⟧ »sys/h/filsys.h«
/* (-lgl
* The information contained herein is a trade secret of Mark Williams
* Company, and is confidential information. It is provided under a
* license agreement, and may be copied or disclosed only under the
* terms of that agreement. Any reproduction or disclosure of this
* material without the express written authorization of Mark Williams
* Company or persuant to the license agreement is unlawful.
*
* COHERENT Version 0.7.3
* Copyright (c) 1982, 1983, 1984.
* An unpublished work by Mark Williams Company, Chicago.
* All rights reserved.
-lgl) */
/*
* Super block.
*/
#ifndef FILSYS_H
#define FILSYS_H
#include <types.h>
#include <fblk.h>
/*
* Size definitions.
*/
#define NICINOD 100 /* Number of free in core inodes */
#define BSIZE 512 /* Block size */
#define INOPB 8 /* Number of inodes per block */
#define BOOTBI 0 /* Boot block index */
#define SUPERI 1 /* Super block index */
#define INODEI 2 /* Inode block index */
#define BADFIN 1 /* Bad block inode number */
#define ROOTIN 2 /* Root inode number */
/*
* Super block.
*/
struct filsys {
unsigned short s_isize; /* Firt block not in inode list */
daddr_t s_fsize; /* Size of entire volume */
short s_nfree; /* Number of addresses in s_free */
daddr_t s_free[NICFREE]; /* Free block list */
short s_ninode; /* Number of inodes in s_inode */
ino_t s_inode[NICINOD]; /* Free inode list */
char s_flock; /* Not used */
char s_ilock; /* Not used */
char s_fmod; /* Super block modified flag */
char s_ronly; /* Mounted read only flag */
time_t s_time; /* Last super block update */
daddr_t s_tfree; /* Total free blocks */
ino_t s_tinode; /* Total free inodes */
short s_m; /* Interleave factor */
short s_n; /* Interleave factor */
char s_fname[6]; /* File system name */
char s_fpack[6]; /* File system pack name */
long s_unique; /* Unique number */
};
/*
* Functions.
*/
#define iblockn(ino) (INODEI+(ino-1)/INOPB)
#define iblocko(ino) ((ino-1)%INOPB)
#endif