revoutput(3am)

NAME#

revoutput - Reverse output strings sample extension

SYNOPSIS#

@load "revoutput"

BEGIN { REVOUT = 1 } # Reverse all output strings

DESCRIPTION#

The revoutput extension adds a simple output wrapper that reverses the characters in each output line. It's main purpose is to show how to write an output wrapper, although it may be mildly amusing for the unwary.

EXAMPLE#

@load "revoutput"
BEGIN {
\n
    REVOUT = 1
\n
    print "hello, world" > "/dev/stdout"
}

The output from this program is:

dlrow ,olleh

BUGS#

This extension does not affect the default standard output.

SEE ALSO#

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

AUTHOR#

Arnold Robbins, [email protected].

COPYING PERMISSIONS#

Copyright © 2012, 2013, 2018, 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.