su: cannot set user id: Resource temporarily unavailable

[Michael ODonnell]

Another vote for strace.  Depending on circumstances I
sometimes first startup a separate session thus:

   script /tmp/tediousDebugSession.log

...and then just allow the strace+program command to let
fly via stdout.  It can be a mess but having program output
intermixed with the resultant strace spewage can sometimes
help when trying to divine which parts are relevant.






P.S.  It's "jibe" not "jive"...   ;->