uuencode - Man Page

UU-encode/decode binary data


package require Tcl  8

package require uuencode  ?1.1.4?

::uuencode::encode string

::uuencode::decode string

::uuencode::uuencode ?-name string? ?-mode octal? (-file filename | ?--? string)

::uuencode::uudecode (-file filename | ?--? string)


This package provides a Tcl-only implementation of the uuencode(1) and uudecode(1) commands. This encoding packs binary data into printable ASCII characters.

::uuencode::encode string

returns the uuencoded data. This will encode all the data passed in even if this is longer than the uuencode maximum line length. If the number of input bytes is not a multiple of 3 then additional 0 bytes are added to pad the string.

::uuencode::decode string

Decodes the given encoded data. This will return any padding characters as well and it is the callers responsibility to deal with handling the actual length of the encoded data. (see uuencode).

::uuencode::uuencode ?-name string? ?-mode octal? (-file filename | ?--? string)
::uuencode::uudecode (-file filename | ?--? string)

UUDecode a file or block of data. A file may contain more than one embedded file so the result is a list where each element is a three element list of filename, mode value and data.


-filename name

Cause the uuencode or uudecode commands to read their data from the named file rather that taking a string parameter.

-name string

The uuencoded data header line contains the suggested file name to be used when unpacking the data. Use this option to change this from the default of "data.dat".

-mode octal

The uuencoded data header line contains a suggested permissions bit pattern expressed as an octal string. To change the default of 0644 you can set this option. For instance, 0755 would be suitable for an executable. See chmod(1).


% set d [uuencode::encode "Hello World!"]
% uuencode::uudecode $d
Hello World!
% set d [uuencode::uuencode -name hello.txt "Hello World"]
begin 644 hello.txt
% uuencode::uudecode $d
{hello.txt 644 {Hello World}}

Bugs, Ideas, Feedback

This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category base64 of the Tcllib Trackers [http://core.tcl.tk/tcllib/reportlist]. Please also report any ideas for enhancements you may have for either package and/or documentation.

When proposing code changes, please provide unified diffs, i.e the output of diff -u.

Note further that attachments are strongly preferred over inlined patches. Attachments can be made by going to the Edit form of the ticket immediately after its creation, and then using the left-most button in the secondary navigation bar.


encoding, uuencode


Text processing


1.1.4 tcllib Text encoding & decoding binary data