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    1 .TH INPLACE 3am "Jun 26 2018" "Free Software Foundation" "GNU Awk Extension Modules"
    2 .SH NAME
    3 inplace \- emulate sed/perl/ruby in-place editing
    5 .ft CW
    6 .nf
    7 gawk -i inplace ...
    8 .fi
    9 .ft R
   11 The
   12 .I inplace
   13 extension adds two functions named
   14 .B inplace_begin()
   15 and
   16 .BR inplace_end() .
   17 These functions are meant to be invoked from the
   18 .I inplace.awk
   19 wrapper which is installed when
   20 .I gawk
   21 is.
   22 .PP
   23 By default, each named file on the command line is
   24 replaced with a new file of the same name whose contents
   25 are the results of running the AWK program.
   26 If the user supplies an AWK variable named
   27 .B inplace::suffix
   28 in a
   29 .B BEGIN
   30 rule or on the command line, then the
   31 .I inplace
   32 extension concatenates that suffix onto the original
   33 filename and uses the result as a filename for renaming
   34 the original.
   35 .PP
   36 For backwards compatibility, the variable will also check
   38 (in the
   39 .B awk
   40 namespace) for the suffix to use if
   41 .B inplace::suffix
   42 is not set.
   43 .PP
   44 One can disable inplace editing selectively by placing
   45 .B inplace::enable=0
   46 on the command line prior to files that should be processed normally.
   47 One can reenable inplace editing by placing
   48 .B inplace::enable=1
   49 prior to files that should be subject to inplace editing.
   50 .\" .SH NOTES
   51 .SH BUGS
   52 While the extension does attempt to preserve ownership and permissions,
   53 it makes no attempt to copy the ACLs from the original file.
   54 .PP
   55 If the program dies prematurely, as might happen if an unhandled signal
   56 is received, a temporary file may be left behind.
   58 .ft CW
   59 .nf
   60 gawk -i inplace '\f(CIscript\fP' files ...
   61 .br
   62 gawk -i inplace -f \f(CIscriptfile\fP files ...
   63 .fi
   64 .ft R
   65 .SH "SEE ALSO"
   66 .IR "GAWK: Effective AWK Programming" ,
   67 .IR filefuncs (3am),
   68 .IR fnmatch (3am),
   69 .IR fork (3am),
   70 .IR ordchr (3am),
   71 .IR readdir (3am),
   72 .IR readfile (3am),
   73 .IR revoutput (3am),
   74 .IR rwarray (3am).
   75 .SH AUTHOR
   76 Andrew Schorr,
   77 .BR schorr@telemetry-investments.com .
   79 Copyright \(co 2012, 2013, 2015, 2018, 2019,
   80 Free Software Foundation, Inc.
   81 .PP
   82 Permission is granted to make and distribute verbatim copies of
   83 this manual page provided the copyright notice and this permission
   84 notice are preserved on all copies.
   85 .ig
   86 Permission is granted to process this file through troff and print the
   87 results, provided the printed document carries copying permission
   88 notice identical to this one except for the removal of this paragraph
   89 (this paragraph not being relevant to the printed manual page).
   90 ..
   91 .PP
   92 Permission is granted to copy and distribute modified versions of this
   93 manual page under the conditions for verbatim copying, provided that
   94 the entire resulting derived work is distributed under the terms of a
   95 permission notice identical to this one.
   96 .PP
   97 Permission is granted to copy and distribute translations of this
   98 manual page into another language, under the above conditions for
   99 modified versions, except that this permission notice may be stated in
  100 a translation approved by the Foundation.
  101 .\" vim: set filetype=nroff :