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- TAR(1)
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- NAME
- tar - process tape archives
-
- SYNOPSIS
- tar -c[bfvw] device block filename...
- tar -r[bvw] device block [filename...]
- tar -t[fv] device
- tar -u[bvw] device block
- tar -x[flmovw] device [filename...]
-
- DESCRIPTION
- Tar reads and writes archive files which conform to the
- Archive/Interchange File Format specified in IEEE Std.
- 1003.1-1988.
-
- Options
- The following options are available:
-
- -c Creates a new archive; writing begins at the
- beginning of the archive, instead of after the
- last file.
-
- -r Writes names files to the end of the archive.
-
- -t Lists the names of all of the files in the
- archive.
-
- -u Causes named files to be added to the archive if
- they are not already there, or have been modified
- since last written into the archive. This implies
- the -r option.
-
- -x Extracts named files from the archive. If a named
- file matches a directory whose contents had been
- written onto the archive, that directory is recur-
- sively extracted. If a named file in the archive
- does not exist on the system, the file is create
- with the same mode as the one in the archive,
- except that the set-user-id and get-group-id modes
- are not set unless the user has appropriate
- privileges.
-
- If the files exist, their modes are not changed except as
- described above. The owner, group and modification time are
- restored if possible. If no filename argument is given, the
- entire contents of the archive is extracted. Note that if
- several files with the same name are in the archive, the
- last one will overwrite all earlier ones.
-
- -b Causes tar to use the next argument on the command
- line as the blocking factor for tape records. The
- default is 1; the maximum is 20. This option
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- TAR(1)
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- should only be used with raw magnetic tape
- archives. Normally, the block size is determined
- automatically when reading tapes.
-
- -f Causes tar to use the next argument on the command
- line as the name of the archive instead of the
- default, which is usually a tape drive. If - is
- specified as a filename tar writes to the standard
- output or reads from the standard input, whichever
- is appropriate for the options given. Thus, tar
- can be used as the head or tail of a pipeline.
-
- -l Tells tar to report if it cannot resolve all of
- the links to the files being archived. If -l is
- not specified, no error messages are written to
- the standard output. This modifier is only valid
- with the -c, -r and -u options.
-
- -m Tells tar not to restore the modification times.
- The modification time of the file will be the time
- of extraction. This modifier is invalid with th
- -t option.
-
- -o Causes extracted files to take on the user and
- group identifier of the user running the program
- rather than those on the archive. This modifier
- is only valid with the -x option.
-
- -v Causes tar to operate verbosely. Usually, tar
- does its work silently, but the v modifier causes
- it to print the name of each file it processes,
- preceded by the option letter. With the -t
- option, v gives more information about the archive
- entries than just the name.
-
- -w Causes tar to print the action to be taken, fol-
- lowed by the name of the file, and then wait for
- the user's confirmation. If a word beginning with
- y is given, the action is performed. Any other
- input means "no". This modifier is invalid with
- the -t option.
-
- FILES
- /dev/tty used to prompt the user for information when the
- -i or -y options are specified.
-
- SEE ALSO
- cpio(1), dd(1), find(1), pax(1), cpio(5), tar(5)
-
- COPYRIGHT
- Copyright (c) 1989 Mark H. Colburn.
- All rights reserved.
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- TAR(1)
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- Redistribution and use in source and binary forms are per-
- mitted provided that the above copyright notice is dupli-
- cated in all such forms and that any documentation,
- advertising materials, and other materials related to such
- distribution and use acknowledge that the software was
- developed by Mark H. Colburn and sponsored by The USENIX
- Association.
-
- THE SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS
- OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE
- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PAR-
- TICULAR PURPOSE.
-
- AUTHOR
- Mark H. Colburn
- NAPS International
- 117 Mackubin Street, Suite 1
- St. Paul, MN 55102
- mark@jhereg.MN.ORG
-
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- Sponsored by The USENIX Association for public distribution.
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