How to provide password to a command that prompts for one in bash?

I'm writing a UNIX shell function that is going to execute a command that will prompt the user for a password. I want to hard-code the password into the script and provide it to the command. I've tried piping the password into the command like this: ``` function() { echo "password" | command } ``` This may not work for some commands as the command may flush the input buffer before prompting for the password. I've also tried redirecting standard input to a file containing the password like this, but that doesn't work either: ``` function() { echo "password" > pass.tmp command < pass.tmp rm pass.tmp } ``` I know that some commands allow for the password to be provided as an argument, but I'd rather go through standard input. I'm looking for a quick and dirty way of piping a password into a command in bash.