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+.pa 1
+.he 'MT (I)'6/12/72'MT (I)'
+.ti 0
+NAME		mt  --  manipulate magtape
+.sp
+.ti 0
+SYNOPSIS	mt__  [ key ] [ name ... ]
+.sp
+.ti 0
+DESCRIPTION	mt__
+saves and restores selected portions of the file system
+hierarchy on magtape.
+Its actions are controlled by the key___ argument.
+The key is a string of characters containing
+at most one function letter and possibly
+one or more function modifiers.
+Other arguments to the command are file or directory
+names specifying which files are to be dumped, restored,
+or tabled.
+
+The function portion of
+the key is specified by one of the following letters:
+
+.in +6
+.ti -3
+r  The indicated files and directories, together with
+all subdirectories, are dumped
+onto the tape.
+The old contents of the tape are lost.
+
+.ti -3
+x  extracts the named files from the tape to the file system.
+The owner, mode, and date-modified are restored to what they
+were when the file was dumped.
+If no file argument is given, the entire contents of the
+tape are extracted.
+
+.ti -3
+t  lists the names of all files stored on the tape which
+are the same as or are hierarchically below
+the file arguments.  If no file argument is given,
+the entire contents of the tape are tabled.
+
+.ti -3
+l  is the same as t_ except that an expanded listing
+is produced giving all the available information about the
+listed files.
+
+.in -6
+The following characters may be used in addition to the letter
+which selects the function desired.
+
+.in +6
+.ti -3
+0, ..., 7  This modifier selects the drive on which the tape is mounted.
+"0" is the default.
+
+.ti -3
+v  Normally mt__ does its work silently.  The v_ (verbose)
+option causes it to type the name of each file it treats
+preceded by a letter to indicate what is happening.
+
+.in +2
+ a  file is being added
+ x  file is being extracted
+
+.in -2
+The v_ option can be used with r_ and x_ only.
+
+.ti -3
+f  causes
+new entries copied on tape to be 'fake' in that
+only the entries, not the data associated
+with the entries are updated.
+Such fake entries cannot be extracted.
+Usable only with r_.
+
+.ti -3
+w  causes mt__ to pause before treating each file, type
+the indicative letter and the file name (as with v_)
+and await the user's response.  Response
+"y" means "yes", so the file is treated.  Null response
+means "no", and the file does not take part
+in whatever is being done.  Response "x" means "exit";
+the mt__ command terminates immediately.  In the x_ function,
+files previously asked about
+have been extracted already.
+With r_, no change has been made to the tape.
+
+.ti -3
+m  make (create) directories during an x_ if necessary.
+.in -6
+.sp
+.ti 0
+FILES		/dev/mt?
+.sp
+.ti 0
+SEE ALSO	tap(I), tap(V)
+.sp
+.ti 0
+DIAGNOSTICS	Tape open error
+.br
+Tape read error
+.br
+Tape write error
+.br
+Directory checksum
+.br
+Directory overflow
+.br
+Seek error
+.br
+Tape overflow
+.br
+Phase error (a file has changed after it was selected for
+dumping but before it was dumped)
+.br
+.sp
+.ti 0
+BUGS		If, during an "x",
+the files are specified in a different order
+than they are on the tape,
+seek errors will result because the tape
+cannot be rewound.