.\" Copyright (c) 1981, 1990, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by the University of .\" California, Berkeley and its contributors. .\" 4. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" @(#)mt.1 8.1 (Berkeley) 6/6/93 .\" .Dd June 6, 1993 .Dt MT 1 .Os BSD 4 .Sh NAME .Nm mt .Nd magnetic tape manipulating program .Sh SYNOPSIS .Nm mt .Op Fl f Ar tapename .Ar command .Op Ar count .Sh DESCRIPTION .Nm Mt is used to give commands to a magnetic tape drive. By default .Nm mt performs the requested operation once. Operations may be performed multiple times by specifying .Ar count . Note that .Ar tapename must reference a raw (not block) tape device. .Pp The available commands are listed below. Only as many characters as are required to uniquely identify a command need be specified. .Bl -tag -width "eof, weof" .It Cm eof , weof Write .Ar count end-of-file marks at the current position on the tape. .It Cm fsf Forward space .Ar count files. .It Cm fsr Forward space .Ar count records. .It Cm bsf Back space .Ar count files. .It Cm bsr Back space .Ar count records. .It Cm rewind Rewind the tape (Count is ignored). .It Cm offline , rewoffl Rewind the tape and place the tape unit off-line (Count is ignored). .It Cm status Print status information about the tape unit. .El .Pp If a tape name is not specified, and the environment variable .Ev TAPE does not exist; .Nm mt uses the device .Pa /dev/rmt12 . .Pp .Nm Mt returns a 0 exit status when the operation(s) were successful, 1 if the command was unrecognized, and 2 if an operation failed. .Sh ENVIRONMENT If the following environment variable exists, it is utilized by .Nm mt . .Bl -tag -width Fl .It Ev TAPE .Nm Mt checks the .Ev TAPE environment variable if the argument .Ar tapename is not given. .Sh FILES .Bl -tag -width /dev/rmt* -compact .It Pa /dev/rmt* Raw magnetic tape interface .El .Sh SEE ALSO .\".Xr mtio 4 , .Xr dd 1 , .Xr ioctl 2 , .Xr environ 7 .Sh HISTORY The .Nm mt command appeared in .Bx 4.3 . .\" mt.1: mtio(4) missing