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Full Discussion: grepping
Top Forums UNIX for Dummies Questions & Answers grepping Post 35605 by plelie2 on Tuesday 22nd of April 2003 10:04:23 AM
Old 04-22-2003
grepping

The above is a possibility. However you'll only get the occurences where there are exactly the number of requested lines. If the requested string would be placed at the end of the file you would not see it.

I should do the trick with a little script
Code:
lnnr=10;
num_of_lines=10;
while read line
do
  if (( $lnnr < $num_of_lines ))
  then
    echo $line
    (( lnnr=$lnnr + 1 ))
  else
    echo $line | grep "string or whatever" >/dev/null 2>&1
    if (( $?==0 ))
    then 
      lnnr=0
      echo $line
    fi
  fi
done < inputfile

Smilie

I added code tags for readability -- Perderabo

Last edited by Perderabo; 04-22-2003 at 11:17 AM..
 

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ZGREP(1)						    BSD General Commands Manual 						  ZGREP(1)

NAME
zgrep, zegrep, zfgrep -- print lines matching a pattern in gzip-compressed files SYNOPSIS
zgrep [grep-flags] [--] pattern [files ...] zegrep [grep-flags] [--] pattern [file ...] zfgrep [grep-flags] [--] pattern [file ...] DESCRIPTION
zgrep runs grep(1) on files or stdin, if no files argument is given, after decompressing them with zcat(1). The grep-flags and pattern arguments are passed on to grep(1). If an -e flag is found in the grep-flags, zgrep will not look for a pattern argument. zegrep calls egrep(1), while zfgrep calls fgrep(1). EXIT STATUS
In case of missing arguments or missing pattern, 1 will be returned, otherwise 0. SEE ALSO
egrep(1), fgrep(1), grep(1), gzip(1), zcat(1) AUTHORS
Thomas Klausner <wiz@NetBSD.org> BSD
December 28, 2003 BSD
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