Help Script

[Vogra]

Hi All!

I need to select a field on the first line of block of two lines, but on second line is the fied that I can use to identify it.

Like this:

13245 MANDF #12345 15678
ford my@id.com

---
I need the filed number 3 (#12345).

There are a lot of lines like this.

Any idea?
Thanx,
Lima.

[RAC_1]

so you want as follows
If line has "ford my@id.com"
you want one line above and thrid feild from it??

[harry d brown jr]

#!/usr/bin/perl
#
#
$prevline = "";
#
#
while () {
if (/my\@id.com/) {
($fld1,$fld2,$fld3,$fld4) = split(/ /,$prevline);
printf("%s\n",$fld3);
}
$prevline = $_;
}

chmod a+x perlscript
cat filename | perlscript

live free or die
harry d brown jr

[Hein van den Heuvel · Accepted solution]

awk '{old=new; new=$3}/ford/{print old}' data-file

ford is an example selection string.
replace with 'my@id.com' or whatever needed.

if the data line is recognizable for example by the 'MANDF' or the #, then you can optimize to:

awk '/#/{old=$3}/ford/{print old}' data-file

Hein.