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UUENCODE(1)		  BSD General Commands Manual		   UUENCODE(1)

     uuencode, uudecode, b64encode, b64decode -- encode/decode a binary	file

     uuencode [-m] [-o output_file] [file] name
     uudecode [-cimprs]	[file ...]
     uudecode [-i] -o output_file
     b64encode [-o output_file]	[file] name
     b64decode [-cimprs] [file ...]
     b64decode [-i] -o output_file [file]

     The uuencode and uudecode utilities are used to transmit binary files
     over transmission mediums that do not support other than simple ASCII
     data.  The	b64encode utility is synonymous	with uuencode with the -m flag
     specified.	 The b64decode utility is synonymous with uudecode with	the -m
     flag specified.

     The uuencode utility reads	file (or by default the	standard input)	and
     writes an encoded version to the standard output, or output_file if one
     has been specified.  The encoding uses only printing ASCII	characters and
     includes the mode of the file and the operand name	for use	by uudecode.

     The uudecode utility transforms uuencoded files (or by default, the stan-
     dard input) into the original form.  The resulting	file is	named either
     name or (depending	on options passed to uudecode) output_file and will
     have the mode of the original file	except that setuid and execute bits
     are not retained.	The uudecode utility ignores any leading and trailing

     The following options are available for uuencode:

     -m	    Use	the Base64 method of encoding, rather than the traditional
	    uuencode algorithm.

     -o	output_file
	    Output to output_file instead of standard output.

     The following options are available for uudecode:

     -c	    Decode more	than one uuencoded file	from file if possible.

     -i	    Do not overwrite files.

     -m	    When used with the -r flag,	decode Base64 input instead of tradi-
	    tional uuencode input.  Without -r it has no effect.

     -o	output_file
	    Output to output_file instead of any pathname contained in the in-
	    put	data.

     -p	    Decode file	and write output to standard output.

     -r	    Decode raw (or broken) input, which	is missing the initial and
	    possibly the final framing lines.  The input is assumed to be in
	    the	traditional uuencode encoding, but if the -m flag is used, or
	    if the utility is invoked as b64decode, then the input is assumed
	    to be in Base64 format.

     -s	    Do not strip output	pathname to base filename.  By default
	    uudecode deletes any prefix	ending with the	last slash '/' for se-
	    curity reasons.

     The following example packages up a source	tree, compresses it, uuencodes
     it	and mails it to	a user on another system.  When	uudecode is run	on the
     target system, the	file ``src_tree.tar.Z''	will be	created	which may then
     be	uncompressed and extracted into	the original tree.

	   tar cf - src_tree | compress	|
	   uuencode src_tree.tar.Z | mail sys1!sys2!user

     The following example unpacks all uuencoded files from your mailbox into
     your current working directory.

	   uudecode -c < $MAIL

     The following example extracts a compressed tar archive from your mailbox

	   uudecode -o /dev/stdout < $MAIL | zcat | tar	xfv -

     basename(1), compress(1), mail(1),	uucp(1), uuencode(5)

     Files encoded using the traditional algorithm are expanded	by 35% (3
     bytes become 4 plus control information).

     The uudecode and uuencode utilities appeared in 4.0BSD.

BSD			       January 27, 2002				   BSD


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