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

NAME
     uuuuddeeccooddee, uuuueennccooddee - encode/decode a binary file

SYNOPSIS
     uuuueennccooddee [-mm] [-oo outputfile] [file] name
     uuuuddeeccooddee [-cciippss] [file ...]
     uuuuddeeccooddee [-ii] -oo outputfile [file]

DESCRIPTION
     The uuuueennccooddee and uuuuddeeccooddee utilities are used to transmit binary files
     over transmission mediums that do not support other than simple ASCII
     data.

     The uuuueennccooddee utility reads file (or by default the standard input) and
     writes an encoded version to the standard output, or outputfile 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 uuuuddeeccooddee.

     The uuuuddeeccooddee 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 uuuuddeeccooddee) outputfile and will
     have the mode of the original file except that setuid and execute bits
     are not retained.  The uuuuddeeccooddee utility ignores any leading and trailing
     lines.

     The following options are available for uuuueennccooddee:

     -mm     Use the Base64 method of encoding, rather than the traditional
            uuuueennccooddee algorithm.

     -oo outputfile
            Output to outputfile instead of standard output.

     The following options are available for uuuuddeeccooddee:

     -cc     Decode more than one uuencode'd file from file if possible.

     -ii     Do not overwrite files.

     -oo outputfile
            Output to outputfile instead of any pathname contained in the
            input data.

     -pp     Decode file and write output to standard output.

     -ss     Do not strip output pathname to base filename.  By default
            uuuuddeeccooddee deletes any prefix ending with the last slash '/' for
            security purpose.

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

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

     The following example unpack all uuencode'd files from your mailbox into
     your current working directory.

           uudecode -c < $MAIL

     The following example extract a compress'ed tar archive from your mailbox

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

LEGACY DESCRIPTION
     In legacy operation, uuuuddeeccooddee masks file modes with 0666, preventing the
     creation of executable files.

     uuuuddeeccooddee cannot change the mode of a created file which is not owned by
     the current user (unless that user is root).  In legacy operation,
     fchmod(2) allows the mode to be changed.

SEE ALSO
     basename(1), compress(1), mail(1), uucp(1), fchmod(2), uuencode(5)

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

HISTORY     The uuuuddeeccooddee and uuuueennccooddee utilities appeared in 4.0BSD.

BSD                            January 27, 2002                            BSD