topic Re: awk help in Operating System - HP-UX

awk help

Hanry Zhou — Mon, 29 Sep 2003 15:56:35 GMT

for i in `cat /tmp/users.dat`
do
USER=`echo $i | awk -F":" '{print $1}'`
UID=`echo $i | awk -F":" '{print $2}'`
GROUP=`echo $i | awk -F":" '{print $3}'`
DIR=`echo $i | awk -F":" '{print $4}'`
SHELL=`echo $i | awk -F":" '{print $5}'`
COMMENTS=`echo $i | awk -F":" '{print $6}'`
done

The sample of the line in t/mp/users.dat is following:
user:uid:group:dir:shell:firstname lastname,location,phone,

My question is: how can I assign the rest portion of the line
after"shell:" to $6?
The current script only assign "firstname" to $6, and it cuts off the portion of
" lastname,location,phone,".

Thanks,

Re: awk help

curt larson_1 — Mon, 29 Sep 2003 16:06:39 GMT

just testing
no points

Re: awk help

curt larson_1 — Mon, 29 Sep 2003 16:10:04 GMT

an different way would be

oldIFS="$IFS"
IFS=":"

cat /tmp/users.dat |
while read USER UID GROUP DIR SHELL REST
do
print $USER
print $REST
#etc
done
IFS="$oldIFS"

sorry for the test, but I hadn't been able to reply for a month or so

Re: awk help

curt larson_1 — Mon, 29 Sep 2003 16:16:26 GMT

another way

only works if ":" is only used as field seperator

cat tmp/users.dat | tr ":" " " |
read USER UID GROUP DIR SHELL COMMENTS
print $USER
print "$COMMENTS"

if there are extra fields read will place them all in the last variable name

Re: awk help

curt larson_1 — Mon, 29 Sep 2003 16:18:27 GMT

oops really should be a while loop in that last suggestion:

cat tmp/users.dat | tr ":" " " |
while read USER UID GROUP DIR SHELL COMMENTS
do
print $USER
print "$COMMENTS"
# etc
done

Re: awk help

A. Clay Stephenson — Mon, 29 Sep 2003 16:22:12 GMT

Here is one approach:
#!/usr/bin/sh
FNAME=/tmp/users.dat
cat ${FNAME} | while read i
do
USER=$(echo ${i} | awk -F":" '{print $1}')
UID=$(echo ${i} | awk -F":" '{print $2}')
GROUP=$(echo ${i} | awk -F":" '{print $3}')
DIR=$(echo ${i} | awk -F":" '{print $4}')
SHELL=$(echo ${i} | awk -F":" '{print $5}')
COMMENTS=$(echo ${i} | awk -F":" '{print $6}')
done

Re: awk help

curt larson_1 — Mon, 29 Sep 2003 16:24:57 GMT

could always do it this way

COMMENTS=`echo $i | cut -d":" -f6

Re: awk help

curt larson_1 — Mon, 29 Sep 2003 16:29:40 GMT

or as

cat /tmp/users.dat |
while read line
do
comment=${line##*:}
done

Re: awk help

Hanry Zhou — Wed, 01 Oct 2003 12:43:43 GMT

Curt,

Thanks for your messages,

Could you please explore this a little bit more:
comment=${line##*:}

Points will be followed.

Re: awk help

Vitek Pepas — Wed, 01 Oct 2003 12:54:37 GMT

It means 'comment equals everything after the last colon in the line'