revtwoway - Reverse strings sample two-way processor extension


   @load "revtwoway"

   BEGIN {
       cmd = "/magic/mirror"
       print "hello, world" |& cmd
       cmd |& getline result
       print result


   The  revtwoway  extension adds a simple two-way processor that reverses
   the characters in each line sent to it for  reading  back  by  the  AWK
   program.   It's  main  purpose  is  to  show  how  to  write  a two-way
   extension, although it may also be mildy amusing.


   GAWK:  Effective   AWK   Programming,   filefuncs(3am),   fnmatch(3am),
   fork(3am),   inplace(3am),  ordchr(3am),  readdir(3am),  readfile(3am),
   revoutput(3am), rwarray(3am), time(3am).


   Arnold Robbins,


   Copyright  2012, 2013, Free Software Foundation, Inc.

   Permission is granted to make and distribute verbatim  copies  of  this
   manual  page  provided  the copyright notice and this permission notice
   are preserved on all copies.

   Permission is granted to copy and distribute modified versions of  this
   manual  page  under  the conditions for verbatim copying, provided that
   the entire resulting derived work is distributed under the terms  of  a
   permission notice identical to this one.

   Permission  is  granted  to  copy  and  distribute translations of this
   manual page into another  language,  under  the  above  conditions  for
   modified  versions, except that this permission notice may be stated in
   a translation approved by the Foundation.

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