Initial commit

1 files changed, 42 insertions, 0 deletions

diff --git a/sys/mtio/mtio.h b/sys/mtio/mtio.h
new file mode 100644
index 00000000..a400a88a
--- /dev/null
+++ b/sys/mtio/mtio.h
@@ -0,0 +1,42 @@
+# MTIO.H --  Magtape i/o interface definitions.  Note that the system config
+# file contains additional definitions (i.e., MT_MAXTAPES).
+
+define	TAPECAP		"dev$tapecap"	# default tapecap file
+define	LOCKLDIR	"tmp$"		# where the lock file goes
+define	LOCKFILE	"mt"		# root lockfile name
+define	LOCKEXTN	".lok"		# lockfile extension
+define	MT_MAGIC	(-5417)		# was zopnmt called by mtopen?
+define	SZ_DEVICE	79		# max length of drive name
+define	SZ_IODEV	79		# max length host device name
+define	SZ_LKNAME	79		# max length lock file mame
+define	SZ_DEVCAP	512		# max command line tapecap chars
+
+# MTIO device descriptor structure.  The device descriptor is implemented
+# as the two dimensional integer array MTDEV, defined in the mtio common.
+# The DEVPOS substructure must agree with the driver, os$zfiomt.c.
+
+define	MT_DEVICE	mtnam[1,$1+1]	# drive name
+define	MT_IODEV	mtosn[1,$1+1]	# i/o device
+define	MT_LKNAME	mtlkn[1,$1+1]	# lock file name
+
+define	LEN_MTIODES	11
+define	MT_DEVPOS	MT_FILNO	# devpos struct (passed to driver)
+define	LEN_DEVPOS	5
+
+define	MT_OSCHAN	mtdev[1,$1+1]	# OS channel or 0
+define	MT_ACMODE	mtdev[2,$1+1]	# new access mode
+define	MT_DEVCAP	mtdev[3,$1+1]	# pointer to tapecap entry for device
+define	MT_FILE		mtdev[4,$1+1]	# new file number
+define	MT_RECORD	mtdev[5,$1+1]	# new record number
+define	MT_ATEOF	mtdev[6,$1+1]	# reached end of file on a read
+define	MT_FILNO	mtdev[7,$1+1]	# old file number at open
+define	MT_RECNO	mtdev[8,$1+1]	# old record number at open
+define	MT_NFILES	mtdev[9,$1+1]	# nfiles on tape
+define	MT_TAPEUSED	mtdev[10,$1+1]	# total tape used, bytes
+define	MT_PFLAGS	mtdev[11,$1+1]	# i/o flags returned by driver
+
+# PFLAGS bitflags.
+define	MF_ERR		001B		# i/o error in last operation
+define	MF_EOF		002B		# tape mark seen in last operation
+define	MF_EOT		004B		# end of tape seen in last op
+define	MF_EOR		010B		# last op was a record advance