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Top Forums Shell Programming and Scripting sed command within script wrongly deleting the last line Post 303014626 by rbalaj16 on Friday 16th of March 2018 11:17:46 AM
Old 03-16-2018
RudiC,

I get error with that sed command. once we fix this command, i need to put it in a for loop for processing list of all my input files and see if i do not get my original issue here too.

and other part is, my input file may contain other ~variables~ which are not part of a.txt. so those should be remain same.


Code:
$more b.txt
line1
line2
~variableA~
line4

$more a.txt
variableA=/proj/apps/sun
variableB=/tmp

$sed 's:^:s#~:; s:=:~#:; s:$:#:; ' b.txt | sed -f- a.txt
Cannot open pattern-file: -

OS version:
SunOS ahs2518 5.10 Generic_150400-27 sun4v sparc sun4v

Thanks


Moderator's Comments:
Mod Comment Seriously: Please use CODE tags as required by forum rules!

Last edited by RudiC; 03-16-2018 at 12:44 PM.. Reason: Changed CODE tags.
 

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Perl::Critic::Policy::InputOutput::ProhibitTwoArgOpen(3)User Contributed Perl DocumentatioPerl::Critic::Policy::InputOutput::ProhibitTwoArgOpen(3)

NAME
Perl::Critic::Policy::InputOutput::ProhibitTwoArgOpen - Write "open $fh, q{<}, $filename;" instead of "open $fh, "<$filename";". AFFILIATION
This Policy is part of the core Perl::Critic distribution. DESCRIPTION
The three-argument form of "open" (introduced in Perl 5.6) prevents subtle bugs that occur when the filename starts with funny characters like '>' or '<'. The IO::File module provides a nice object-oriented interface to filehandles, which I think is more elegant anyway. open( $fh, '>output.txt' ); # not ok open( $fh, q{>}, 'output.txt' ); # ok use IO::File; my $fh = IO::File->new( 'output.txt', q{>} ); # even better! It's also more explicitly clear to define the input mode of the file, as in the difference between these two: open( $fh, 'foo.txt' ); # BAD: Reader must think what default mode is open( $fh, '<', 'foo.txt' ); # GOOD: Reader can see open mode This policy will not complain if the file explicitly states that it is compatible with a version of perl prior to 5.6 via an include statement, e.g. by having "require 5.005" in it. CONFIGURATION
This Policy is not configurable except for the standard options. NOTES
There are two cases in which you are forced to use the two-argument form of open. When re-opening STDIN, STDOUT, or STDERR, and when doing a safe pipe open, as described in perlipc. SEE ALSO
IO::Handle IO::File AUTHOR
Jeffrey Ryan Thalhammer <jeff@imaginative-software.com> COPYRIGHT
Copyright (c) 2005-2011 Imaginative Software Systems. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.16.3 2014-06-09 Perl::Critic::Policy::InputOutput::ProhibitTwoArgOpen(3)
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