MT (I) 6/12/72 MT (I)
NAME mt -- manipulate magtape
SYNOPSIS mt [ key ] [ name ... ]
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 func-
tion 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:
r The indicated files and directories, to-
gether with all subdirectories, are dumped
onto the tape. The old contents of the
tape are lost.
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.
t lists the names of all files stored on the
tape which are the same as or are hierar-
chically below the file arguments. If no
file argument is given, the entire contents
of the tape are tabled.
l is the same as t except that an expanded
listing is produced giving all the avail-
able information about the listed files.
The following characters may be used in addition
to the letter which selects the function desired.
0, ..., 7 This modifier selects the drive on
which the tape is mounted. "0" is the de-
fault.
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.
a file is being added
x file is being extracted
The v option can be used with r and x only.
f causes new entries copied on tape to be
'fake' in that only the entries, not the
data associated with the entries are up-
dated. Such fake entries cannot be ex-
tracted. Usable only with r.
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.
m make (create) directories during an x if
necessary.
FILES /dev/mt?
SEE ALSO tap(I), tap(V)
DIAGNOSTICS Tape open error
Tape read error
Tape write error
Directory checksum
Directory overflow
Seek error
Tape overflow
Phase error (a file has changed after it was se-
lected for dumping but before it was dumped)
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 re-
wound.