revtwoway.3am man page

revtwoway — Reverse strings sample two-way processor extension

Synopsis

@load "revtwoway"

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

Description

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.

See Also

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

Author

Arnold Robbins, arnold@skeeve.com.

Copying Permissions

Copyright © 2012, 2013, Free Software Foundation, Inc.

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Info

Jan 15 2013 Free Software Foundation GNU Awk Extension Modules