uuencode - encode a binary file
uudecode - decode a file created by uuencode
uuencode [-m] [ file ] name
uudecode [-o outfile] [ file ]...
Uuencode and uudecode are used to transmit binary files over transmis-
sion 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 print-
ing 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.
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 auto-
matically decide which of the both supported encoding schemes are used.
The following example packages up a source tree, compresses it, uuen-
codes 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
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).
The uuencode command appeared in BSD 4.0.
Man(1) output converted with