I'm trying to find out whether there is a Screen running or not with a function. To make it more simple ive written a little test script:
#! /bin/bash
function status()
{
if [ $a==1 ]
then
echo 1
else
echo 0
fi
}
a=1
echo $(status)
a=0
echo $(status)
status
if [ $(status)==0 ]
then
echo "Success"
else
echo "Fail"
fi
The Output is: 1;1;Sucess
But it should be: 1;0;Sucess
What am I doing wrong?
thanks alot, chrys
You need spaces around ==
so: if [ $a==1 ] should be:
if [ "$a" == 1 ]
and
if [ $(status) == 0 ]
== is not defined. It may work in bash, but correctly it's only a single equals sign =
bash and the code in question begins with #!/bin/bash. I'm not sure if the comment was warranted.bash manpage: "= should be used with the test command for POSIX conformance."bash by saying bash --posix.sh tag instead of bash. No?Try this:
Remove spaces around == , included quotes and removed a call for status
#! /bin/bash
function status()
{
if [ $a == '1' ]
then
echo 1
else
echo 0
fi
}
a=1
echo $(status)
a=0
echo $(status)
if [ $(status) == '0' ]
then
echo "Success"
else
echo "Fail"
fi
