Red Hat Bugzilla – Bug 796910
Change the default location for credential cache to /run/user/UID/krb5cc
Last modified: 2015-02-17 09:08:14 EST
kstart hardcodes a default of /tmp/krb5cc_uid_XXXXXX. This needs to be /run/usr/USERNAME/krb5cc.
558 if (xasprintf(&tmp, "/tmp/krb5cc_%d_XXXXXX", (int) getuid()) < 0)
559 die("cannot format ticket cache name");
560 fd = mkstemp(tmp);
Looking at this further, I wonder if we should still keep the mkstemp( ...XXXXX) here so we don't clobber a user's existing cache. That would match the current k5start behavior.
mkstemp() might actually be overkill here. We don't need it to be random, just unique. It might be simple enough to make it krb5cc_PID, where it's the PID of the k5start process creating it.
We don't have to worry about predictability when using /run/user/$username, and this guarantees that we won't have to worry about the (admittedly remote) possibility of having two processes randomly generate the same temp string. Especially if one or more of them are long-running.
From looking at the wiki page, this feature has changed to simply suggest getuid(), instead of $USER ?
Yes, we've hit a number of places where forcing a lookup for the username was determined to be both slow and potentially unreliable (because more than one username could possibly share a UID).
For this reason, SSSD is now creating credential caches in /run/user/UID instead.
I've updated the summary.
This bug appears to have been reported against 'rawhide' during the Fedora 19 development cycle.
Changing version to '19'.
(As we did not run this process for some time, it could affect also pre-Fedora 19 development
cycle bugs. We are very sorry. It will help us with cleanup during Fedora 19 End Of Life. Thank you.)
More information and reason for this action is here:
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