Public bug reported:
Binary package hint: apt
(Observed in Kubuntu 7.04)
During initial install of a Kubuntu system, the installer is invoking
apt-get through the progress monitoring script debconf-apt-progress.
Communication between that script and apt-get apparently happens via a
pipe to which apt-get writes its progress messages.
The problem is that apt-get inadvertedly passes its end of the pipe to
its sub-processes (such as postinst scripts of the installed packages).
If the package's postinst script start a daemon (as is being done by
webmin), this daemon will inherit that filedescriptor as well.
However debconf-apt-progress waits for an EOF event on that
filedescriptor before it considers the command to be done. If the pipe
is held open by a long running daemon as described above, it will wait
forever.
Fix: apt-get should set close-on-exec on that filedescriptor.
** Affects: apt (Ubuntu)
Importance: Undecided
Status: New
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apt-get does not correctly close its "progress monitoring" filedescriptor when
invoking postinst scripts
https://bugs.launchpad.net/bugs/136767
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