/* Filtering of data through a subprocess.
- Copyright (C) 2009-2011 Free Software Foundation, Inc.
+ Copyright (C) 2009-2012 Free Software Foundation, Inc.
Written by Bruno Haible <haible@clisp.cons.org>, 2009,
and Paolo Bonzini <bonzini@gnu.org>, 2009.
true, otherwise return 127.
Callback arguments are as described above.
- Data is alternatingly written to the subprocess, through the functions
+ Data is alternately written to the subprocess, through the functions
prepare_write and done_write, and read from the subprocess, through the
functions prepare_read and done_read.