question about awk

perfect_circle · 07-19-2006, 04:38 AM

printing a line with awk that maches a pattern is easy.

What I would like to do is print a line that matches a pattern and the next 4 lines from this line.

Any suggestions?

thanks

spirit receiver · 07-19-2006, 05:12 AM

I don't know about awk, but may I suggest GNU sed?

Code:

sed -n '/REGEXP/,+4 p'

ugenn · 07-19-2006, 05:26 AM

Maybe something along the following lines is what you need:

Code:

awk '
BEGIN {
  match_found = 0;
  line_ctr = 0;
}

{
  if ( match_found != 1 && $0 ~ /xxxxx/ ) match_found = 1;
  else if ( line_ctr < 4 ) { line_ctr++; }
}' "$1"

jim mcnamara · 07-19-2006, 02:15 PM

or maybe

Code:

awk '{
     if( match($0,/REGEXP/) )
           {print ; getline; print; getline; print; getline; print; getline;print }
     }' filename

perfect_circle · 07-19-2006, 02:34 PM

thank you guys..