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INPLACE(3am) GNU Awk Extension Modules INPLACE(3am)
NAME
inplace - emulate sed/perl/ruby in-place editing
SYNOPSIS
gawk -i inplace ...
DESCRIPTION
The inplace extension adds two functions named inplace_begin() and inplace_end(). These
functions are meant to be invoked from the inplace.awk wrapper which is installed when
gawk is.
By default, each named file on the command line is replaced with a new file of the same
name whose contents are the results of running the AWK program. If the user supplies an
AWK variable named INPLACE_SUFFIX in a BEGIN rule or on the command line, then the inplace
extension concatenates that suffix onto the original filename and uses the result as a
filename for renaming the original.
One can disable inplace editing selectively by placing inplace=0 on the command line prior
to files that should be processed normally. One can reenable inplace editing by placing
inplace=1 prior to files that should be subject to inplace editing.
BUGS
While the extension does attempt to preserve ownership and permissions, it makes no at-
tempt to copy the ACLs from the original file.
If the program dies prematurely, as might happen if an unhandled signal is received, a
temporary file may be left behind.
EXAMPLE
gawk -i inplace 'script' files ...
gawk -i inplace -f scriptfile files ...
SEE ALSO
GAWK: Effective AWK Programming, filefuncs(3am), fnmatch(3am), fork(3am), ordchr(3am),
readdir(3am), readfile(3am), revoutput(3am), rwarray(3am).
AUTHOR
Andrew Schorr, schorr AT telemetry-investments.com.
COPYING PERMISSIONS
Copyright (C) 2012, 2013, 2015, 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.
Free Software Foundation Feb 02 2018 INPLACE(3am)
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On Apache
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