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Full Discussion: Parsing a file in bash
Top Forums UNIX for Advanced & Expert Users Parsing a file in bash Post 302910628 by Akshay Hegde on Saturday 26th of July 2014 05:17:19 AM
Old 07-26-2014
Try :

if you have gawk, if pattern is ip address...

Code:
awk --re-interval '
/[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}/{
	if(p)print ""
	printf("%s%s",$0,OFS)
	next
}
{
	printf $2 OFS
	p=1
}
END{
	print ""
}'

or just this if assumption is numeric char

Code:
awk  '
/^[0-9]/{
	if(p)print ""
	printf("%s%s",$0,OFS)
	next
}
{
	printf $2 OFS
	p=1
}
END{
	print ""
}' file

 

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LEARN ABOUT LINUX

igawk

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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