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+.TH TP 8
+.SH NAME
+tp \- manipulate tape archive
+.SH SYNOPSIS
+.B tp
+[ key ] [ name ... ]
+.SH DESCRIPTION
+.PP
+.I Tp
+saves and restores files
+on DECtape or magtape.
+Its actions are controlled by the
+.I 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 listed.
+In all cases, appearance of a directory name refers to
+the files and (recursively) subdirectories of that directory.
+.PP
+The function portion of
+the key is specified by one of the following letters:
+.TP 8
+.B  r
+The named files
+are written
+on the tape.
+If files with the same names
+already exist, they are replaced.
+`Same' is determined by string comparison, so
+`./abc' can never be the same as `/usr/dmr/abc' even
+if `/usr/dmr' is the current directory.
+If no file argument is given, `\fB.\fR' is the default.
+.TP 8
+.B  u
+updates the tape.
+.B u
+is like
+.B r,
+but a file is replaced only if its
+modification date is later than the date stored on the tape;
+that is to say, if it has changed since it was dumped.
+.B u
+is the default command if none is given.
+.TP 8
+.B  d
+deletes the named files from
+the tape.
+At least one name argument must be given.
+This function is not permitted on magtapes.
+.TP 8
+.B  x
+extracts the named files from the tape to the file system.
+The owner and mode are restored.
+If no file argument is given, the entire contents of the
+tape are extracted.
+.TP 8
+.B  t
+lists the names of the specified files.
+If no file argument is given,
+the entire contents of the tape is listed.
+.PP
+The following characters may be used in addition to the letter
+which selects the function desired.
+.TP 10
+.B  m
+Specifies magtape as opposed to DECtape.
+.TP 10
+.B  0,...,7
+This
+modifier selects the drive on which the tape is mounted.
+For DECtape, 
+.B x
+is default; for magtape
+`0' is the default.
+.TP 10
+.B  v
+Normally
+.I tp
+does its work silently.
+The
+.B v
+(verbose)
+option causes it to type the name of each file it treats
+preceded by the function letter.
+With the
+.B t
+function,
+.B v
+gives more information about the
+tape entries than just the name.
+.TP 10
+.B  c
+means a fresh dump is being created; the tape directory
+is cleared before beginning.
+Usable only with
+.B r
+and
+.B u.
+This option is assumed with magtape since
+it is impossible to selectively overwrite
+magtape.
+.TP 10
+.B  i
+Errors reading and writing the
+tape are noted, but no action is taken.
+Normally, errors cause a return to the command level.
+.TP 10
+.B f
+Use the first named file, rather than a tape,
+as the archive.
+This option currently acts like 
+.BR m ;
+.I i.e.
+.BR r
+implies 
+.BR c ,
+and neither
+.BR d
+nor
+.BR u
+are permitted.
+.TP 10
+.B  w
+causes
+.I tp
+to pause before treating each file, type
+the indicative letter and the file name (as with
+.BR v )
+and await the user's response.
+Response
+.B 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
+.B x
+means `exit';
+the
+.I tp
+command terminates immediately.
+In the
+.B x
+function,
+files previously asked about
+have been extracted already.
+With
+.B "r, u,"
+and
+.B d
+no change has been made to the tape.
+.PP
+.SH FILES
+/dev/tap?
+.br
+/dev/rmt?
+.SH SEE ALSO
+ar(1), tar(1)
+.SH DIAGNOSTICS
+Several; the non-obvious one is
+`Phase error', which means the file changed after it was selected for
+dumping but before it was dumped.
+.SH BUGS
+A single file with several links to it is treated like several files.
+.PP
+Binary-coded control information makes
+magnetic tapes written by
+.I tp
+difficult to carry to other machines;
+.IR tar (1)
+avoids the problem.