Edit File: inplace.awk
# inplace --- load and invoke the inplace extension. # # Copyright (C) 2013, 2017 the Free Software Foundation, Inc. # # This file is part of GAWK, the GNU implementation of the # AWK Programming Language. # # GAWK is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 3 of the License, or # (at your option) any later version. # # GAWK is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA # # Andrew J. Schorr, aschorr@telemetry-investments.com # January 2013 @load "inplace" # Please set INPLACE_SUFFIX to make a backup copy. For example, you may # want to set INPLACE_SUFFIX to .bak on the command line or in a BEGIN rule. # By default, each filename on the command line will be edited inplace. # But you can selectively disable this by adding an inplace=0 argument # prior to files that you do not want to process this way. You can then # reenable it later on the commandline by putting inplace=1 before files # that you wish to be subject to inplace editing. # N.B. We call inplace_end() in the BEGINFILE and END rules so that any # actions in an ENDFILE rule will be redirected as expected. BEGIN { inplace = 1 # enabled by default } BEGINFILE { if (_inplace_filename != "") inplace_end(_inplace_filename, INPLACE_SUFFIX) if (inplace) inplace_begin(_inplace_filename = FILENAME, INPLACE_SUFFIX) else _inplace_filename = "" } END { if (_inplace_filename != "") inplace_end(_inplace_filename, INPLACE_SUFFIX) }
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