qmail and spamdyke installation failure

[Gary Gendel <gary%genashor.com@localhost>]

The qmail package won't install because of a dependency on checkpassword 
which doesn't exist in the pkcsrc repository. However, checkpassword-pam 
does and can be used as a replacement.

I did a local add of checkpassword so I could get things installed. Then 
I installed spamdyke with checkpassword-pam authorization but it failed 
because all authorizations were being rejected.

I tracked it down to the checkpassword-pam module.  On illumos, pam 
requires that you have PAM_PTY set before you can open a session.  I 
reported this bug, but for those that have Illumos (Solaris, etc.), my 
fix was to set PAM_PTY to /dev/null just prior to the code that opens 
the session (in pam-support.c):

retval = pam_set_item(pamh, PAM_TTY, "/dev/null");
if (retval != PAM_SUCCESS) {
    fatal("Setting PAM_TTY failed: %s", pam_strerror(pamh, retval));
    return 1;
}

I didn't push that in as I'm not sure of it's effect on other 
architectures, we'll have to wait for the checkpassword-pam maintainer 
to bless the change first.

Gary

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