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wayland: Bump RLIMIT_NOFILE limit

Vlad Zahorodnii requested to merge work/zzag/bump-no-file into master

As a wayland compositor kwin can hold many open file descriptors and therefore it's easier for it to hit the soft file descriptor limit. This change makes kwin_wayland bump the soft file descriptor limit to the hard limit. With systemd, it's usually 500K.

In order to prevent causing mess in child processes, pthread_atfork() is used to register a handler which will be invoked in the child process after fork() in order to restore RLIMIT_NOFILE to its original value.

fixes #75 (closed)

Edited by Vlad Zahorodnii

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