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Top Forums Shell Programming and Scripting Delete first block of text with sed/awk Post 302591286 by teresaejunior on Thursday 19th of January 2012 06:01:36 AM
Old 01-19-2012
Java Delete first block of text with sed/awk

Hello, guys!

"filename" has blocks with three lines each in this fashion:
Code:
93909286
    #verified
    has one bug
10909286
    #unverified
    pending
10909286
     #unverified
     pending

The above example has duplicate blocks, and I have tried using sed to remove just one block... The following piece of code removes all matching blocks, but I want to have only the duplicates removed:
Code:
sed -i '/^10909286$/,+2 d' filename

The following awk code has the same problem as the sed one, besides not being able to edit the file inline as "sed -i", but I could workaround it:
Code:
awk '/^10909286$/{c=3};--c<0' filename

Any ideas?

Thank you!

Last edited by teresaejunior; 01-19-2012 at 07:16 AM.. Reason: bananas don't have wings
 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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