Actually I mainly work with Ruby, but now I have created a bash script file. From this script file I am displaying the messages on the screen. Here is my scenario.
I have used aosd_cat module for displaying the messages on the screen and I did it successfully. For this I used their documentation .
Here is my message.sh
script file:
#!/bin/bash
function message_1(){
if [ condition ]
echo 'message -1' | DISPLAY=:0 aosd_cat -u 10000 -e 2 -t 2 -R 'Green' -n 'Arial Bold 20' -p 0 -x 10 -y 60
else
echo 'message -4' | DISPLAY=:0 aosd_cat -u 10000 -e 2 -t 2 -R 'Green' -n 'Arial Bold 20' -p 0 -x 10 -y 60
fi
}
function message_2(){
echo 'message -2' | DISPLAY=:0 aosd_cat -u 10000 -e 2 -t 2 -R 'Green' -n 'Arial Bold 20' -p 0 -x 10 -y 60
}
function message_3(){
echo 'message -3' | DISPLAY=:0 aosd_cat -u 10000 -e 2 -t 2 -R 'Green' -n 'Arial Bold 20' -p 0 -x 10 -y 60
}
# As I have to display messages continuously
while true
do
message_1
message_2
message_3
done
After execution I get that messages are displaying one by one (message_1 is displaying first then message_2 and then message_3).
I have to display all the messages at the same time. To achieve this I think I can execute those commands in subshell/as subprocess/in the background (so it doesn't affect on other processes).
In ruby we have system command which executes the given command in a subshell. How can I achieve this type of functionality in the bash script file?