[Bug 268965] New: kdesu silently hangs and never exits when there's a stale lock left behind.

[crockabiscuit at yahoo.com]

https://bugs.kde.org/show_bug.cgi?id=268965

           Summary: kdesu silently hangs and never exits when there's a
                    stale lock left behind.
           Product: kde
           Version: 1.0
          Platform: Slackware Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: unassigned-bugs at kde.org
        ReportedBy: crockabiscuit at yahoo.com


Version:           1.0 (using KDE 4.5.5) 
OS:                Linux

kdesu started to hang a while ago.
Since it just silently hung, I didn't know what was happening.
kdesu never made a password dialog, and it just hung forever.
After a significant amount of search, I was reminded that strace could be
useful.
"strace kdesu foobar" hung at the line, connect(9, {sa_family=AF_FILE,
path="/tmp/ksocket-$USER/kdesud_:0"...}, XX.

So I googled the line, and I found
http://forums.gentoo.org/viewtopic-p-5716721.html?sid=1253a2f9945bd29f678456722ac62c2c.

The solution was to remove the lock file, /tmp/ksocket-$USER/kdesud_:0.

I think kdesu at least has to notify a user of a stale lock so that one can
remove it and make kdesu work again.
Or kdesu can be modified never to leave a stale lock.

Since I don't know how to create a stale lock file, I don't know how to
reproduce it, but it seems certainly reproducible.

Reproducible: Sometimes

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