Bash options within a function

[paulsp]

I just started looking around in bash and options to tweak it. Absolutely interesting! But I am stuck at the following. The idea is that you type "apache" and get the option list. This works fine. But I also want - alternatively - to be able to type "apache Start" and right away run the command listed under the Start option. Is this possible?


function apache
{
OPTIONS="Start Stop Restart Status"
select opt in $OPTIONS; do
if [ "$opt" = "Start" ]; then
sudo /etc/init.d/apache2 start
return
elif [ "$opt" = "Stop" ]; then
sudo /etc/init.d/apache2 stop
return
elif [ "$opt" = "Restart" ]; then
sudo /etc/init.d/apache2 restart
return
elif [ "$opt" = "Status" ]; then
sudo /etc/init.d/apache2 status
return
else
echo "Sorry, not valid"
fi
done
}

[gmargo]

Typically one would use a case statement for this. Here's an example (uses standard shell syntax and only echoes for demonstration purposes):



#!/bin/sh

apache()
{
case $1 in
Start)
echo "Start"
;;
Stop)
echo "Stop"
;;
Restart)
echo "Restart"
;;
Status)
echo "Status"
;;
*)
echo "Invalid: specify Start, Stop, Restart, or Status"
;;
esac
}

apache
apache "Start"
apache Status
Output:


$ sh ap.sh
Invalid: specify Start, Stop, Restart, or Status
Start
Status

[paulsp]

Thanks, I will try this out! The idea is that if there is no action specified, that the options come into place. So something like:


apache()
{
case $1 in
Start)
sudo /etc/init.d/apache2 start
;;
Stop)
sudo /etc/init.d/apache2 stop
;;
Restart)
sudo /etc/init.d/apache2 restart
;;
Status)
sudo /etc/init.d/apache2 status
;;
*)
OPTIONS="Start Stop Restart Status"
select opt in $OPTIONS; do
if [ "$opt" = "Start" ]; then
sudo /etc/init.d/apache2 start
return
elif [ "$opt" = "Stop" ]; then
sudo /etc/init.d/apache2 stop
return
elif [ "$opt" = "Restart" ]; then
sudo /etc/init.d/apache2 restart
return
elif [ "$opt" = "Status" ]; then
sudo /etc/init.d/apache2 status
return
else
echo "Sorry, not valid"
fi
done

;;
esac
}



I am not using an Ubuntu machine so I will try this later.