INPLACE(3am) GNU Awk Extension Modules INPLACE(3am)
inplace - emulate sed/perl/ruby in-place editing
gawk -i inplace ...
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 con-
catenates 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.
While the extension does attempt to preserve ownership and permissions,
it makes no attempt 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.
gawk -i inplace 'script' files ...
gawk -i inplace -f scriptfile files ...
GAWK: Effective AWK Programming, filefuncs(3am), fnmatch(3am),
fork(3am), ordchr(3am), readdir(3am), readfile(3am), revoutput(3am),
Andrew Schorr, email@example.com.
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