uuencode, uudecode - encode a binary  file,  or  decode  its
     ASCII representation

     uuencode [ source-file ] file-label

     uudecode [ encoded-file ]

     uuencode  converts  a  binary  file  into  an  ASCII-encoded
     representation  that  can be sent using mail(1).  It encodes
     the contents of source-file, or the  standard  input  if  no
     source-file  argument  is given.  The file-label argument is
     required.  It is included in the encoded  file's  header  as
     the  name  of  the  file into which uudecode is to place the
     binary (decoded) data.  uuencode also includes the ownership
     and  permission  modes of source-file, so that file-label is
     recreated with those same ownership and permission modes.

     If the remote host is a UNIX  system  with  the  sendmail(8)
     mail-message  delivery  daemon,  you  can pipe the output of
     uuencode through mail(1) to the recipient  named  decode  on
     the  remote  host.  This recipient is typically an alias for
     the uudecode program (see  aliases(5)  for  details),  which
     allows  a  binary file to be decoded (extracted) from a mail
     message automatically.  If this alias is absent on a partic-
     ular host, the encoded file can be mailed to a user, who can
     run it through uudecode manually.

     uudecode reads an encoded-file, strips off any  leading  and
     trailing  lines  added by mailer programs, and recreates the
     original binary data with the  filename  and  the  mode  and
     owner specified in the header.

     The encoded file is an ordinary ASCII text file; it  can  be
     edited  by  any  text editor.  But it is best only to change
     the mode or file-label in the header to avoid corrupting the
     decoded binary.

     mail(1), uucp(1C), uusend(1C),  uux(1C),  aliases(5),  uuen-
     code(5), sendmail(8)

     The encoded file's size is expanded by 35% (3  bytes  become
     4,  plus  control information), causing it to take longer to
     transmit than the equivalent binary.

     The user on the remote system who is invoking uudecode (typ-
     ically  uucp)  must have write permission on the file speci-
     fied in the file-label.
     Since both uuencode and uudecode run with  user  ID  set  to
     uucp,  uudecode  can  fail  with  ``permission denied'' when
     attempted in a directory that does not have write permission
     allowed for ``other.''