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Diffstat (limited to 'sys/mtio/README')
| -rw-r--r-- | sys/mtio/README | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/sys/mtio/README b/sys/mtio/README new file mode 100644 index 00000000..143917e6 --- /dev/null +++ b/sys/mtio/README @@ -0,0 +1,45 @@ +MTIO -- Magtape i/o. This directory contains the FIO device driver for the +magtape devices plus MTOPEN (used to open a magtape device and hook it to +FIO) plus a few other routines. See ./doc for additional info. + + +USER ROUTINES + + yes|no = mtfile (fname) # Is fname a magtape device? + yes|no = mtneedfileno (mtname) # No file number given? + gty = mtcap (mtname) + mtfname (mtname, file, outstr, maxch) + + mtparse (mtname, device, fileno, recno, attrl, maxch) + mtencode (mtname, maxch, device, fileno, recno, attrl) + + fd = mtopen (mtname, acmode, bufsize) + mtrewind (mtname, initcache) + mtposition (mtname, file, record) + + Use CLOSE to close a file descriptor opened with mtopen. + Use GTYCLOSE to close a termcap descriptor opened with mtcap. + MTNAME is the full magtape device specification, i.e, "mt[...]". + + + +SYSTEM ROUTINES + + mtallocate (mtname) + mtdeallocate (mtname, rewind_tape) + mtstatus (out, mtname) + mtclean (level, stale, out) + + + +FIO DRIVER + + zopnmt (iodev, acmode, mtchan) + zclsmt (mtchan, status) + zardmt (mtchan, buf, maxbytes, offset) + zawrmt (mtchan, buf, nbytes, offset) + zawtmt (mtchan, status) + zsttmt (mtchan, what, lvalue) + + +All other procedures are internal to the interface. |