topic conditional awk statement in Operating System - HP-UX

conditional awk statement

Jaris Detroye — Thu, 13 Nov 2003 10:58:38 GMT

Is it possible to use and 'if' clause with in awk?

If so, could someone provide me with an example.

I am parsing a log file and I want to save a line in one variable if it starts with 'CMD:' (yes I am reading the cron log) and another if it does not.

Any ideas?

Re: conditional awk statement

Steven E. Protter — Thu, 13 Nov 2003 11:04:11 GMT

I'm not sure if this is what you want but.

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=251166

Stuart has some very slick awk code in his post.

SEP

Re: conditional awk statement

A. Clay Stephenson — Thu, 13 Nov 2003 11:06:21 GMT

Create a file my.awk:
{
if ($0 ~ /^CMD:/)
{
var1 = $0
}
else
{
var2 = $0
}
}

awk -f my.awk < infile

Re: conditional awk statement

Ian Dennison_1 — Thu, 13 Nov 2003 11:07:00 GMT

cat file1 |awk '$1 ~ /^CMD:/ {print "save line 1"} $1 !~ /^CMD:/ {print "save line 2"}'

Share and Enjoy! Ian

Re: conditional awk statement

Michael Schulte zur Sur — Thu, 13 Nov 2003 11:08:51 GMT

BEGIN{}
{
if (index($0,"CMD:)=1)
LINE1=$0
else
LINE2=$0;
}
END{}

Enough or more,

Michael

Re: conditional awk statement

curt larson_1 — Thu, 13 Nov 2003 11:08:54 GMT

the syntax is
if (expr) statement
[else statement]

which gives you something like this

if ( outline != "" ) {
if ( type == "b" )
print something;
else
print somethingelse;
}

Re: conditional awk statement

Michael Schulte zur Sur — Thu, 13 Nov 2003 11:10:39 GMT

Hi,

it must of course be CMD:"

greetings,

Michael

Re: conditional awk statement

Graham Cameron_1 — Thu, 13 Nov 2003 11:13:27 GMT

awk '
$0 ~ /CMD/ {printf "Line no %d contains CMD\n", NR}
$0 !~ /CMD/ {printf "Line no %d does not contain CMD\n", NR}
' /var/adm/cron/log

-- Graham