. \" @(#)gnutar.1	1.3 04/09/26 Copyr 2004 J. Schilling
. \"  Manual Seite fuer gnutar
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.TH GNUTAR 1 "04/09/26" "J\*org Schilling" "Schily\'s USER COMMANDS"
.SH NAME
gnutar \- emulates the GNU version of the tar archiver
.SH SYNOPSIS
.B "gnutar\ "
.I command
[
.I options
] 
.I file1 .\|.\|. filen
.SH DESCRIPTION
.PP
This manual page documents the GNU version of
.BR tar ,
an archiving program designed to store and extract files from 
an archive file known as a 
.IR tarfile.
A 
.IR tarfile 
may be made on a tape drive, however, it is also common
to write a
.IR tarfile
to a normal file. 
The first argument to 
.B gnutar
must be one of the options:
.BR Acdrtux ,
followed by any optional functions.
The final arguments to 
.B gnutar
are the names of the files or directories which should be archived. The use
of a directory name always implies that the subdirectories below should be
included in the archive.
.SH COMMAND
.TP
.B "One of the following commands must be used:
.TP
.BR \-A ", " \-\-catenate ", " \-\-concatenate
append tar files to an archive
.TP
.BR \-c ", " \-\-create	
create a new archive
.TP
.BR \-d ", " \-\-diff ", " \-\-compare
find differences between archive and file system
.TP
.B \-\-delete
delete from the archive (not for use on mag tapes!)
.TP
.BR \-r ", " \-\-append
append files to the end of an archive
.TP
.BR \-t ", " \-\-list	
list the contents of an archive
.TP
.BR \-u ", " \-\-update		
only append files that are newer than copy in archive
.TP
.BR \-x ", " \-\-extract ", " \-\-get		
extract files from an archive
.SH OPTIONS
.TP
.B \-\-atime\-preserve	
don't change access times on dumped files
.TP
.BR \-b ", " \-\-block\-size " N	
block size of Nx512 bytes (default N=20)
.TP
.BR \-B ", " \-\-read\-full\-blocks	
reblock as we read (for reading 4.2BSD pipes)
.TP 
.BR \-C ", " \-\-directory " DIR	
change to directory DIR
.TP 
.B \-\-checkpoint		
print directory names while reading the archive
.TP
.BR \-f ", " \-\-file " [HOSTNAME:]F	
use archive file or device F (default /dev/rmt0)
.TP
.B \-\-force\-local		
archive file is local even if has a colon
.TP 
.BR \-F ", " \-\-info\-script " F, " \-\-new\-volume\-script " F
run script at end of each tape (implies \-M)
.TP
.BR \-G ", " \-\-incremental	
create/list/extract old GNU-format incremental backup
.TP
.BR \-g ", " \-\-listed\-incremental " F
create/list/extract new GNU-format incremental backup
.TP 
.BR \-h ", " \-\-dereference	
don't dump symlinks; dump the files they point to
.TP
.BR \-i ", " \-\-ignore\-zeros	
ignore blocks of zeros in archive (normally mean EOF)
.TP
.BR \-j ", " \-\-bzip
filter the archive through bzip2.
.TP
.B \-\-ignore\-failed\-read	
don't exit with non-zero status on unreadable files
.TP
.BR \-k ", " \-\-keep\-old\-files	
keep existing files; don't overwrite them from archive
.TP
.BR \-K ", " \-\-starting\-file " F
begin at file F in the archive
.TP
.BR \-l ", " \-\-one\-file\-system	
stay in local file system when creating an archive
.TP
.BR \-L ", " \-\-tape\-length " N
change tapes after writing N*1024 bytes
.TP
.BR \-m ", " \-\-modification\-time
don't extract file modified time
.TP
.BR \-M ", " \-\-multi\-volume	
create/list/extract multi-volume archive
.TP
.BR \-N ", " \-\-after\-date " DATE, " \-\-newer " DATE
only store files newer than DATE
.TP
.BR \-o ", " \-\-old\-archive  ", " \-\-portability
write a V7 format archive, rather than ANSI format
.TP
.BR \-O ", " \-\-to\-stdout		
extract files to standard output
.TP
.BR \-p ", " \-\-same\-permissions ", " \-\-preserve\-permissions 
extract all protection information
.TP
.BR \-P ", " \-\-absolute\-paths	
don't strip leading `/'s from file names
.TP
.B \-\-preserve		
like
.BR "\-p \-s" .
.TP
.BR \-R ", " \-\-record\-number	
show record number within archive with each message
.TP 
.B \-\-remove\-files		
remove files after adding them to the archive
.TP
.BR \-s ", " \-\-same\-order ", " \-\-preserve\-order	
list of names to extract is sorted to match archive
.TP
.B \-\-same\-owner
create extracted files with the same ownership 
.TP
.BR \-S ", " \-\-sparse		
handle sparse files efficiently
.TP 
.BR \-T ", " \-\-files\-from= " F	
get names to extract or create from file F
.TP
.B \-\-null			
\-T reads null-terminated names, disable \-C
.TP
.B \-\-totals
print total bytes written with \-\-create
.TP
.BR \-v ", " \-\-verbose
verbosely list files processed
.TP
.BR \-V ", " \-\-label " NAME
create archive with volume name NAME
.TP 
.B \-\-version		
print
.B gnutar
program version number
.TP
.BR \-w ", " \-\-interactive ", " \-\-confirmation	
ask for confirmation for every action
.TP
.BR \-W ", " \-\-verify
attempt to verify the archive after writing it
.TP
.BI \-\-exclude " FILE		
exclude file FILE
.TP
.BR \-X ", " \-\-exclude\-from " FILE	
exclude files listed in FILE
.TP
.BR \-Z ", " \-\-compress ", " \-\-uncompress      	
filter the archive through compress
.TP 
.BR \-z ", " \-\-gzip ", " \-\-ungzip		
filter the archive through gzip
.TP
.BI \-\-use\-compress\-program " PROG
filter the archive through PROG (which must accept \-d)
.SH "EXTENDED OPTIONS
.PP
The extended options are options taken from
.BR star .
.TP
.B \-\-help
Prints a summary of the most important options for
.BR gnutar (1)
and exits.
.TP
.B \-\-xhelp
Prints a summary of the less important options for
.BR gnutar (1)
and exits.
.TP
.B \-\-version
Prints the 
.B gnutar
version number string and exists.
.TP
.B \-\-debug
print additional debug messages
.TP
.BI xdebug= #
.TP
.BI xd= #
set extended debug level
.TP
.B \-/
don't strip leading '/'s from file names
.TP
.B \-..
don't skip filenames that contain '..' in non-interactive extract
.TP
.B \-\-secure\-links
don't extract links that start with '/' or contain '..'
.TP
.B \-\-acl
handle access control lists
.TP
.B \-\-xfflags
handle extended file flags
.TP
.BI bs= #
set (output) block size to #
.TP
.BI fs= #
set fifo size to #
.TP
.B \-\-no\-fsync
do not call fsync() for each extracted file (may be dangerous)
.TP
.B \-\-time
 print timing info
.TP
.B \-\-no\-statistics
do not print statistics
.TP
.B \-\-fifostats
print fifo statistics
.TP
.B \-\-no\-fifo
don't use a fifo to optimize data flow from/to tape
.TP
.B \-\-numeric
don't use user/group name from tape
.PP
The options above are not defined by GNU tar.
.PP
For a complete documentation of the
.B star
based optione check
.BR star (1).

.SH EXAMPLES
.SH ENVIRONMENT
.SH FILES
.SH "SEE ALSO"
.BR spax (1), 
.BR suntar (1), 
.BR scpio (1), 
.BR tar (1), 
.BR cpio (1), 
.BR pax (1), 
.BR rcp (1), 
.BR mt (1),
.BR rmt (1), 
.BR match (1), 
.BR dd (1), 
.BR sdd (1), 
.BR rsh (1),
.BR ssh (1),
.BR star (1),
.BR star (4/5),
.BR rcmd (3),
.BR fssnap (1m)
.SH DIAGNOSTICS
.SH NOTES
.PP
This
.B gnutar
implementation is based on the
.B star
implementation and does not implement all features of the original GNU tar
program.
.SH BUGS
.SH AUTHOR
.nf
J\*org Schilling
Seestr. 110
D\-13353 Berlin
Germany
.fi
.PP
Mail bugs and suggestions to:
.PP
.B
schilling@fokus.fraunhofer.de
or
.B
js@cs.tu\-berlin.de
or
.B
joerg@schily.isdn.cs.tu\-berlin.de