How to pass the value of a variable to the stdin of a command?

Question

I\'m writing a shell script that should be somewhat secure i.e. does not pass secure data through parameters of commands and preferably does not use temporary files. How can

Answer 1

Passing a value to stdin in bash is as simple as:

your-command <<< "$your_variable"

Always make sure you put quotes around variable expressions!

Be cautious, that this will probably work only in bash and will not work in sh.