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UNIX for Dummies Questions & Answers
look for users to be looged on or off
Post 302138919 by ladytwo on Wednesday 3rd of October 2007 10:59:02 PM
10-03-2007
look for users to be looged on or off
what am i doing wrong here's code. i have a file that has names of users and i want to know when they log on and off.
while true
do
for X in "friends1"
do
if who | grep "$X"
then
echo "$X is logged in"
else
sleep 5
fi
echo who > on
if [ $X -ne on]
then
echo "$X is logged off"
else
else sleep 5
fi
done
done
while true
do
for X in "friends1"
do
if who | grep "$X"
then
echo "$X is logged in"
else
sleep 5
fi
echo who > on
if [ $X -ne on]
then
echo "$X is logged off"
else
else sleep 5
fi
done
done
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LEARN ABOUT PHP
boolval
BOOLVAL(3) 1 BOOLVAL(3) boolval - Get the boolean value of a variable SYNOPSIS
boolean boolval (mixed $var) DESCRIPTION
Returns the boolean value of $var. PARAMETERS
o $var - The scalar value being converted to a boolean. RETURN VALUES
The boolean value of $var. EXAMPLES
Example #1 boolval(3) examples <?php echo '0: '.(boolval(0) ? 'true' : 'false')." "; echo '42: '.(boolval(42) ? 'true' : 'false')." "; echo '0.0: '.(boolval(0.0) ? 'true' : 'false')." "; echo '4.2: '.(boolval(4.2) ? 'true' : 'false')." "; echo '"": '.(boolval("") ? 'true' : 'false')." "; echo '"string": '.(boolval("string") ? 'true' : 'false')." "; echo '"0": '.(boolval("0") ? 'true' : 'false')." "; echo '"1": '.(boolval("1") ? 'true' : 'false')." "; echo '[1, 2]: '.(boolval([1, 2]) ? 'true' : 'false')." "; echo '[]: '.(boolval([]) ? 'true' : 'false')." "; echo 'stdClass: '.(boolval(new stdClass) ? 'true' : 'false')." "; ?> The above example will output: 0: false 42: true 0.0: false 4.2: true "": false "string": true "0": false "1": true [1, 2]: true []: false stdClass: true SEE ALSO
floatval(3), intval(3), strval(3), settype(3), is_bool(3), Type juggling. PHP Documentation Group BOOLVAL(3)