From: Konstantin Khlebnikov
> Sent: 23 May 2019 17:22
....
> > In addition, the syscall will also work for tasks that do not have procfs
> > mounted and on kernels that do not have procfs support compiled in. In such
> > situations the only way to make sure that all file descriptors are closed
> > is to call close() on each file descriptor up to UINT_MAX or RLIMIT_NOFILE,
> > OPEN_MAX trickery (cf. comment [8] on Rust).
Code using RLIMIT_NOFILE is broken.
It is easy to reduce the hard limit below that of an open fd.
David
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