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Full Discussion: Sed parsing error
Top Forums Shell Programming and Scripting Sed parsing error Post 302272434 by gravy26 on Tuesday 30th of December 2008 03:19:24 PM
Old 12-30-2008
Sed parsing error
I'm having a problem with a sed script.

A programmer needs to change columns 942,943,944 to blank spaces only where it has the number 999 in every line.

I didn't have a copy of the data file to test with originally so made my own up with a bunch of x's and put 999 in columns 5-7. The sed worked.

Today, I got a copy of the real data file, changed the ‘4' to ‘941' to reflect the actual starting column and the script fails with :

---

# ./sed_test

#!/bin/ksh -xv

#

sed -e 's/^\(.\{940\}\)999/\1 /' /admin/bin/test/PGINPEN > /admin/bin/test/sed.test.data.out

+ sed -e s/^\(.\{940\}\)999/\1 / /admin/bin/test/PGINPEN

+ 1> /admin/bin/test/sed.test.data.out

sed: 0602-404 Function s/^\(.\{941\}\)999/\1 / cannot be parsed.

___
It doesn't like the starting column for some reason.

Here are the 2 scripts I used.

sed -e 's/^\(.\{4\}\)999/\1 /' /admin/bin/test/sed.test.data2 > /admin/bin/test/sed.test.data.out

sed -e 's/^\(.\{941\}\)999/\1 /' /test.input.file > /test.output.file

Any ideas?
 

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LEARN ABOUT DEBIAN

shtool-subst

SHTOOL-SUBST.TMP(1)					      GNU Portable Shell Tool					       SHTOOL-SUBST.TMP(1)

NAME

       shtool-subst - GNU shtool sed(1) substitution operations

SYNOPSIS

       shtool subst [-v|--verbose] [-t|--trace] [-n|--nop] [-w|--warning] [-q|--quiet] [-s|--stealth] [-i|--interactive] [-b|--backup ext]
       [-e|--exec cmd] [-f|--file cmd-file] [file] [file ...]

DESCRIPTION

       This command applies one or more sed(1) substitution operations to stdin or any number of files.

OPTIONS

       The following command line options are available.

       -v, --verbose
	   Display some processing information.

       -t, --trace
	   Enable the output of the essential shell commands which are executed.

       -n, --nop
	   No operation mode. Actual execution of the essential shell commands which would be executed is suppressed.

       -w, --warning
	   Show warning on substitution operation resulting in no content change on every file. The default is to show a warning on substitution
	   operations resulted in no content change on all files.

       -q, --quiet
	   Suppress warning on substitution operation resulting in no content change.

       -s, --stealth
	   Stealth operation. Preserve timestamp on file.

       -i, --interactive
	   Enter interactive mode where the user has to approve each operation.

       -b, --backup ext
	   Preserve backup of original file using file name extension ext.  Default is to overwrite the original file.

       -e, --exec cmd
	   Specify sed(1) command directly.

       -f, --file cmd-file
	   Read sed(1) command from file.

EXAMPLE

	#   shell script
	shtool subst -i -e 's;(c) ([0-9]*)-2000;(c) 1-2001;' *.[ch]

	#    RPM spec-file
	%install
	    shtool subst -v -n 
		-e 's;^(prefix=).*;1 $RPM_BUILD_ROOT%{_prefix};g' 
		-e 's;^(sysconfdir=).*;1 $RPM_BUILD_ROOT%{_prefix}/etc;g' 
		`find . -name Makefile -print`
	    make install

HISTORY

       The GNU shtool subst command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 2001 for GNU shtool.  It was prompted
       by the need to have a uniform and convenient patching frontend to sed(1) operations in the OpenPKG package specifications.

SEE ALSO

       shtool(1), sed(1).

18-Jul-2008							   shtool 2.0.8 					       SHTOOL-SUBST.TMP(1)
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