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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  con-
       catenates that suffix onto the original filename and uses the result as
       a filename for renaming the original.

       For backwards compatibility, the variable will also check  INPLACE_SUF-
       FIX  (in the awk namespace) for the suffix to use if inplace::suffix is
       not set.

       One   can   disable   inplace   editing    selectively    by    placing
       inplace::enable=0  on  the  command  line prior to files that should be
       processed normally.   One  can  reenable  inplace  editing  by  placing
       inplace::enable=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 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.


EXAMPLE

       gawk -i inplace 'script' files ...
       gawk -i inplace -f scriptfile files ...


SEE ALSO

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


AUTHOR

       Andrew Schorr, schorr@telemetry-investments.com.


COPYING PERMISSIONS

       Copyright (C) 2012, 2013, 2015, 2018, 2019, 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  man-
       ual page into another language, under the above conditions for modified
       versions, except that this permission notice may be stated in a  trans-
       lation approved by the Foundation.



Free Software Foundation          Jun 26 2018                     INPLACE(3am)

gawk 5.1.0 - Generated Fri Apr 17 20:11:15 CDT 2020
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