To read a password to pass to another program, you can use the
This function reads a password, prompting with prompt. It does not echo the password as the user types it; instead, it echoes ‘.’ for each character in the password.
The optional argument confirm, if non-
nil, says to read the password twice and insist it must be the same both times. If it isn't the same, the user has to type it over and over until the last two times match.
The optional argument default specifies the default password to return if the user enters empty input. If default is
read-passwdreturns the null string in that case.