topic Re: awk command question in Operating System - HP-UX

awk command question

MikeL_4 — Tue, 10 Aug 2004 12:31:30 GMT

I am creating a file if userid and uid from the passwd file using:

cat /etc/passwd | awk -F":" {print $1 ,$3}

but I also need to insert the hostname into the output, is there a way get this into the awk statement, I already have a variable set for HOST from a command:
HOST=`hostname`
issued earlier in the script.

Thanks

Re: awk command question

Dave Olker — Tue, 10 Aug 2004 12:36:26 GMT

Hi Mike,

You could try using the -v option for awk to set a variable like "HOST" equal to the local hostname and then print the results like this:

cat /etc/passwd | awk -v HOST=`hostname` -F":" '{print HOST, $1 ,$3}'

On my system this returns:

ros87252 root 0
ros87252 daemon 1
ros87252 bin 2
ros87252 sys 3
ros87252 adm 4
ros87252 uucp 5
ros87252 lp 9
ros87252 nuucp 11
...

Regards,

Dave

Re: awk command question

curt larson_1 — Tue, 10 Aug 2004 13:43:03 GMT

another way using awk:

If you have a recent version of awk, such as on 11i, you can do it this way:

awk -F":" '{
print $1, $3, ENIVRON["HOST"];
}'

I'm not sure if HOST needs to be exported from the environment or not.

or you can just do it in the shell

oldIFS="$IFS"
IFS=":"
while read userid x uid stuff
do
print $userid $uid $HOST
done < /etc/passwd
IFS="$oldIFS"

Re: awk command question

curt larson_1 — Tue, 10 Aug 2004 13:45:23 GMT

oops that should have been
ENVIRON
and not
ENIVRON