script on user who logged in????

kim187 · #1 (**permalink**) 04-29-2008

writing a script that will check every 5 seconds whether a particular user has
logged into the system

Code:

# Determine if someone is logged on
# Version 4.0
if [ “$#” ne
1 ]
then
echo “ Incorrect number of arguments”
echo “Usage: $ ison4 <user>”
else
user=“$1”
if who | grep “$user” > /dev/null
then
echo “$user is logged on”
else
echo “$user is not logged on”
fi
fi

is this ok

era · #2 (**permalink**) 04-30-2008

I don't see the loop and the "sleep 5" but as the body of that missing loop, this looks okay (though mind-numbingly verbose -- I guess you want to take out the "is not" case once you have made sure it works correctly).

Yogesh Sawant · #3 (**permalink**) 04-30-2008

how about converting this:

Code:

echo “Usage: $ ison4 <user>”

to:

Code:

echo “Usage: $0 username”

are you planning to run this script using watch ?

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