provide password for script begin called inside another script [duplicate]

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• Why does cron silently fail to run sudo stuff in my script? 1 answer

I have written a shell script which in turn calls another script, but the second one prompts for password. I want to supply the password and pass the prompt without user begin notified.

Here is my script:

su - s3 -c "su.sh"

I trided :

su - s3 -c "echo pass | su.sh"

But I got an error:

standard in must be a tty

Updated:

The screenshot of commands.

I also tired :

 su - s3 -c "echo mypass|sudo -S su.sh"

but another error comes up:

sudo: sorry, you must have a tty to run sudo

su.sh commands:

if [ ! -n "$IS_WINDOWS" ]
then
   /bin/su root -c "...."
fi