ansitape - ANSI standard tape handler
ansitape [key] [keyargs] [files]
ansitape reads and writes magnetic tapes written in ANSI standard format
(called ``Files-11'' by DEC). Tapes written by ansitape are labeled with
the first six characters of the machine name by default. Actions are
controlled by the key argument. The key is a string of characters
containing at most one function letter. Other arguments to the command
are a tape label and filenames specifying which files are to be written
onto or extracted from the tape.
Note that this version is designed to work with text files that is, those
with no more than 2044 bytes without a newline character. Binary files
are unlikely to be handled correctly on either creation or extraction.
The function portion of the key is specified by one of the following
r The named files are written at the end of the tape. The c
function implies this.
x The named files are extracted from the tape. If no file argument
is given, the entire contents of the tape are extracted. Note
that if the tape has duplicated filenames, only the last file of
a given name can be extracted.
t The names of the specified files are listed each time they occur
on the tape. If no file argument is given, all files on the tape
c Create a new tape; writing begins at the beginning of the tape
instead of after the last file. This command implies r.
The following characters may be used in addition to the letter that
selects the function desired.
f This argument allows the selection of a different tape device.
The next word in the keyargs list is taken to be the full name of
a local device on which to write the tape. The default is
n The n option allows the user to specify, as the next argument in
the keyargs list, a control file containing the names of files to
put on the tape. If the filename is '-', the control file will
instead be read from standard input. The control file contains
one line for each file placed on the tape. Each line has two
names, the name of the file on the local machine and its name
when placed on the tape. This allows for a convenient flattening
of hierarchies when placing them on tape. If the second name is
omitted, the UNIX filename will also be used on the tape. This
argument can only be used with the r and c functions.
l The l option allows the user to specify the label to be placed on
the tape. The next argument in the keyargs list is taken as the
tape label, which will be space padded or truncated to six
characters. This option is meaningless unless c is also
v Normally ansitape works relatively silently. The v (verbose)
option causes it to type information about each file as it
b The b option allows the user to select the block size to be used
for the tape. By default, ansitape uses the maximum block size
permitted by the ANSI standard, 2048. Some systems will permit a
much larger block size, and if large files are being put on the
tape, it may be advantageous to do so. ansitape takes the next
argument of the keyargs list as the block size for the tape.
Values below 18 or above 32k will be limited to that range. The
standard scale factors b=512 and k=1024 are accepted.
F The F flag allows ansitape to write ANSI 'D' format-fixed
record-length tapes. The next two keyargs must be the recordsize
and blocksize, with the same scale factors and range limits as
the b option. The files to be written by the F flag must be in
fixed format on the UNIX end-all lines should be exactly record-
size bytes long plus a terminating newline (which will be
discarded). Note that this is exactly the same format produced
by ansitape when reading an ANSI 'D' format tape.
ansitape will not copy directories, character or block special files,
symbolic links, sockets, or binary executables. Attempts to put these on
tape will result in warnings, and they will be skipped completely.
/dev/tape default tape drive
A warning message will be generated when a record exceeds the maximum
record length, and the affected file will be truncated.
ansitape quietly truncates names longer than 17 characters.
Multivolume tapes can be read (provided no files cross the volume
boundary) but not written.
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