[Bug 69] Generalize SSH_ASKPASS

bugzilla-daemon at bugzilla.mindrot.org bugzilla-daemon at bugzilla.mindrot.org
Sat Aug 30 05:07:03 EST 2008


--- Comment #13 from Jim Knoble <jmknoble at pobox.com>  2008-08-30 05:06:57 ---
Alan Barrett's comment in #11 is a much more elegant solution than the
one i proposed.  In case it's not obvious, there are 3 possible states:

(1) Current behavior (depends on whether DISPLAY is set and there is a
controlling tty):


(2) Always use SSH_ASKPASS, ignoring whether DISPLAY is set and whether
a controlling tty exists:


(3) Always prompt on the tty, unless there isn't one, in which case,
fail if a passphrase or confirmation is required:

    SSH_ASKPASS="", or
    (SSH_ASKPASS is unset, i.e., not present in environment)

The third state is not explicit in Alan's comment.  States (1) and (3)
are both current behavior, thus they are completely backward compatible
with current implementations.  State (2) requires command-line options
for ssh-add or ssh-agent.

Nice work, Alan.

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