From 550d0b3217f0a52b1094ae56cf093cfd140e0ae1 Mon Sep 17 00:00:00 2001
From: Natalia Portillo <claunia@claunia.com>
Date: Fri, 5 Aug 2016 18:48:31 +0100
Subject: [PATCH] Added XENIX structures definitions

---
 xenix.h | 100 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 xenix.h

diff --git a/xenix.h b/xenix.h
new file mode 100644
index 0000000..16d5844
--- /dev/null
+++ b/xenix.h
@@ -0,0 +1,100 @@
+#define	S_S3MAGIC	0x2b5544	/* system 3 arbitrary magic value */
+#define	S_CLEAN	0106        	/* arbitrary magic value  */
+
+/* s_type, block size of file system */
+#define	S_B512		1	/* 512 byte block */
+#define	S_B1024		2	/* 1024 byte block */
+
+/* codes for file system version (for utilities) */
+#define	S_V2		1		/* version 7 */
+#define	S_V3		2		/* system 3 */
+
+				/* Note: DIRSIZ must be even, or else add
+				 *       filler byte to direct struct.
+				 */
+#define	DIRSIZ	14
+
+#define NICINOD 100              /* number of superblock inodes */
+
+#ifdef LISA
+
+#define NICFREE 50               /* number of superblock free blocks */
+#define NSBFILL 51              /* aligns s_magic & s_type at end of SB blk */
+
+#else
+
+#define NICFREE 100              /* number of superblock free blocks */
+
+#ifdef XENIX_2.2.1e
+
+#define    NSBFILL 370             /* aligns s_magic & s_type at end of SB blk */
+
+#else
+
+#define    NSBFILL 371             /* aligns s_magic, .. at end of super block */
+
+#endif
+
+#endif
+
+
+typedef long             daddr_t;        /* disc address */
+typedef unsigned short   ino_t;          /* i-node number */
+typedef long             time_t;         /* time (seconds) */
+typedef long             off_t;          /* offset in file */
+
+struct	filsys
+{
+	ushort	s_isize;	/* size in blocks of i-list */
+	daddr_t	s_fsize;	/* size in blocks 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 i-nodes in s_inode */
+	ino_t	s_inode[NICINOD];	/* free i-node list */
+	char	s_flock;	/* lock during free list manipulation */
+	char	s_ilock;	/* lock during i-list manipulation */
+	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_dinfo[4];     /* device information */
+	char	s_fname[6];	/* file system name */
+	char	s_fpack[6];	/* file system pack name */
+	/* remainder is maintained for xenix */
+	char   	s_clean;   	/* S_CLEAN if structure is properly closed */
+	char    s_fill[NSBFILL];/* space to make sizeof filsys be BSIZE */
+	long    s_magic;        /* indicates version of filsys */
+	long	s_type;		/* type of new file system */
+};
+
+struct	fblk
+{
+	short	df_nfree;
+	daddr_t	df_free[NICFREE];
+};
+
+struct	direct
+{
+	ino_t	d_ino;
+	char	d_name[DIRSIZ];
+};
+
+	/* Inode structure as it appears on a disk block. */
+struct dinode
+{
+	ushort di_mode;		/* mode and type of file */
+	short	di_nlink;    	/* number of links to file */
+	ushort	di_uid;      	/* owner's user id */
+	ushort	di_gid;      	/* owner's group id */
+	off_t	di_size;     	/* number of bytes in file */
+	char  	di_addr[40];	/* disk block addresses */
+	time_t	di_atime;   	/* time last accessed */
+	time_t	di_mtime;   	/* time last modified */
+	time_t	di_ctime;   	/* time created */
+};
+/*
+ * the 40 address bytes:
+ *	39 used; 13 addresses
+ *	of 3 bytes each.
+ */