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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. If you want to apply
another character to hide the password, let-bind the variable
read-hide-char with that character.
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
The optional argument default specifies the default password to
return if the user enters empty input. If default is
read-passwd returns the null string in that case.