Hi guys, especially (but not only, so please read on) those of you suffering from the slow startup problem, I'd like to ask to test the latest snapshot DLL from https://cygwin.com/snapshots/
It contains a couple of changes to alleviate the slow startup, namely:
- The default settings for db_home, db_shell, and db_gecos in case
there's no /etc/nsswitch.conf file, or if they are not mentioned
in /etc/nsswitch.conf, are now set to just the fallback, which is
db_home: /home/%U
db_shell: /bin/bash
db_gecos: <empty>
This means, if you don't set these values in /etc/nsswitch.conf,
there's no reason for Cygwin to access the DC via LDAP.
- Next, I revamped the code fetching values over LDAP to do the actual
fetching only if it's really required. So far, the LDAP call was made
all the time, even if the settings in /etc/nsswitch.conf didn't
require that.
- Last but not least, the primary group of the current user account is
not read anymore from the LDAP call, but simply from the current user
token of the user.
- Group account requests don't access LDAP at all, unless values
for the UNIX gid <-> Windows SID mapping are required (see
https://cygwin.com/cygwin-ug-net/ntsec.html#ntsec-mapping-nfs and
https://cygwin.com/cygwin-ug-net/ntsec.html#ntsec-mapping-samba
for an explanation).
All in all, that *should* have the desired effect to avoid all LDAP
calls to the DC for the current user account and its primary and
supplementary group accounts in the default case, even if you only
use the "db" setting for passwd and groups in /etc/nsswitch.conf:
passwd: db
group: db
The only downside for other scenarios is that the default settings
in /etc/nsswitch.conf don't catch the "cygwin desc" settings for
db_home, db_shell, and db_gecos anymore by default. If you want to
use them, you now have to tweak /etc/nsswitch.conf, but most more
complex scenarios will require that anyway.
So, again, please test. If that works as desired, I will update
to 1.7.35 pretty soon.
Thanks,
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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