UNIX for Dummies Questions & Answers

Hi

I'm currently writing a script that looks at the contents of a file and returns a value, based on a user input-

do
cat ~/LAFILE | grep "$SYSTEM" | grep "$USERNAME"
if ! grep user /etc/passwd >/dev/null 2>&1
then
echo "did not find user"
else
echo "found user"
fi
break
done

The problem I am having is that, even if the value is not found, the above is still returning "found user" with no accompanying results. Is there something awry with my logic?

Try this

if [[ -z `grep $user /etc/passwd` ]]
then
echo "did not find user"
else
echo "found user"
fi

Hi

I've got this now -

PS3="Please select the number of the system that you wish to access: "

select SYSTEM in Sys1 Sys2 Sys3
do
cat ~/LAFILE | grep "$SYSTEM" | grep "$USERNAME"
if [[ -z `grep $user /etc/passwd` ]]
then
echo "did not find user"
else
echo "found user"
fi
done

It lists the user roles correctly if there are matches, but does nothing if no matches are found.....

select SYSTEM in Sys1 Sys2 Sys3
do
cat ~/LAFILE | grep "$SYSTEM" | grep "$USERNAME"

# with this line whre is the $USERNAME variable in script ? is it a env var preset

if [[ -z `grep $user /etc/passwd` ]]

# here do you whts $user
then
echo "did not find user"
else
echo "found user"
fi
done

Full script at present looks like this -

rm -f ~/LAFILE 2>/dev/null
cp -f /pcms/utils/addur/current/LASTAPPLIED ~/LAFILE
echo "Please enter the username for which you require access to be set up:"
read USERNAME
PS3="Please select the number of the system that you wish to access: "

select SYSTEM in Sys1 Sys2 Sys3
do
cat ~/LAFILE | grep "$SYSTEM" | grep "$USERNAME"
if [[ -z `grep $user /etc/passwd` ]]
then
echo "did not find user"
else
echo "found user"
fi
done