Provided by: sharutils_4.6.3-4_i386
uuencode, uudecode - encode a binary file, or decode its representation
uuencode [-m] [ file ] name
uudecode [-o outfile] [ file ]...
Uuencode and uudecode are used to transmit binary files over
transmission mediums that do not support other than simple ASCII data.
Uuencode reads file (or by default the standard input) and writes an
encoded version to the standard output. The encoding uses only
printing ASCII characters and includes the mode of the file and the
operand name for use by uudecode. If name is /dev/stdout the result
will be written to standard output. By default the standard UU
encoding format will be used. If the option -m is given on the command
line base64 encoding is used instead.
Note: uuencode uses buffered input and assumes that it is not hand
typed from a tty. The consequence is that at a tty, you may need to
hit Ctl-D several times to terminate input.
Uudecode transforms uuencoded files (or by default, the standard input)
into the original form. The resulting file is named name (or outfile
if the -o option is given) and will have the mode of the original file
except that setuid and execute bits are not retained. If outfile or
name is /dev/stdout the result will be written to standard output.
Uudecode ignores any leading and trailing lines. The program can
automatically decide which of the two supported encoding schemes are
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
tar cf - src_tree | compress | uuencode src_tree.tar.Z | mail
compress(1), mail(1), uucp(1), uuencode(5)
This implementation is compliant with P1003.2b/D11.
If more than one file is given to uudecode and the -o option is given
or more than one name in the encoded files are the same the result is
probably not what is expected.
The encoded form of the file is expanded by 37% for UU encoding and by
35% for base64 encoding (3 bytes become 4 plus control information).
Report bugs to <firstname.lastname@example.org>. Please put sharutils or
uuencode in the subject line. It helps to spot the message.
The uuencode command appeared in BSD 4.0.