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Full Discussion: sed command on AIX, replace specific characters
Top Forums Shell Programming and Scripting sed command on AIX, replace specific characters Post 302995078 by Scrutinizer on Friday 31st of March 2017 12:26:15 PM
Old 03-31-2017
Hi,

What we forgot to mention in the other thread is that when you use 000 instead of ... then you need to use an anchor for the beginning of the line in the form of a caret ( ^ ), otherwise it will try to match 000 with 136 arbitrary characters before it ..

--
Further, alternation is not part of regular sed (which uses BRE, basic regular expressions), instead try specifying the substitution twice:
Code:
sed '/^4000/{s/^\(.\{136\}\)000/\1036/; s/^\(.\{136\}\) 36/\1036/;}' file


---
Alternation would have worked with GNU sed with the -r option (or BSD sed with the -E option) that allows the use of extended regular expressions (ERE), which does have alternation, but GNU sed is usually not present as standard on AIX.
Try:
Code:
sed -r '/^4000/s/^(.{136})( 36|000)/\1036/' file

Last edited by Scrutinizer; 04-01-2017 at 03:39 AM..
This User Gave Thanks to Scrutinizer For This Post:
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LEARN ABOUT DEBIAN

impressive-gettransitions

IMPRESSIVE-GETTRANSITIONS(1)				      Debian GNU/Linux manual				      IMPRESSIVE-GETTRANSITIONS(1)

NAME

       impressive-gettransitions - Generate Impressive info scripts for LaTeX presentations

SYNOPSIS

       impressive-gettransitions FILE.tex

DESCRIPTION

       A simple script to produce a .info file for use with Impressive, using special comments in a LaTeX/Beamer file. FILE.tex is a file to be
       parsed into .info file. For each /fullpath/blah.tex /fullpath/blah.pdf.info gets produced.

SYNTAX

       In the LaTeX document, impressive-gettransitions counts the pages to determine the PDF slide number of each one.

       The simpler page changes are automatically detected, that is:
	   egin{frame} and:
	   pause

       Other, more elaborated page changes must be noted with a %O comment:
	   item<1-> Foo
	   item<2-> Bar %O

       The transition to apply can be specified in a %O comment:
	   egin{frame} %O SlideUp

OPERATION

       When the .info file corresponding to the LaTeX document already exist, impressive-gettransitions does not clear it, but only adds the
       transitions if finds to it.

       Thus, if you modified your document in a way that requires to completely replace the transitions, manually clear the PageProps section of
       the .info file. This can be done by running the following sed command:
	   sed -i -e "/^PageProps = {/,/^}/d" FILE.info

SEE ALSO

       impressive(1)

AUTHOR

       impressive-gettransitions (originally gettransitions) has been written by Rob Reid.

       This manpage has been originally written by Yaroslav Halchenko <debian@onerussian.com>.

Debian Project							    2012-02-10					      IMPRESSIVE-GETTRANSITIONS(1)
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