Bug#942859: uucp: Very slow to start due to closing 1 million FDs

[Marco d'Itri]

On Oct 22, John Goerzen <jgoer...@complete.org> wrote:

In an environment where ulimit -n is 1048576 (as is, for instance, the
case for Docker and most likely other environments that don't have
ulimit/rlimits set by something like systemd-system), most UUCP
programs (including even uulog) try to close nearly all 1048576
possible fds.  The culprit code appears to be in unix/init.c:

I fixed a similar issue in inn this way:

https://salsa.debian.org/md/inn/-/commit/6ecb1b5a60ede157d8ab6f1be97263213c566a04



--
ciao,
Marco

Another option would be to use close_range(2), which has been supported since bullseye.

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