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Pekka Paalanen authored
Some system C libraries do not offer SOCK_CLOEXEC flag. Add a new header for OS compatibility wrappers. Wrap socket() calls into wl_os_socket_cloexec() which makes sure the O_CLOEXEC flag gets set on the file descriptor. On systems having SOCK_CLOEXEC this uses the old socket() call, and falls back if it fails due to the flag (kernel not supporting it). wayland-os.h is private and not exported. Add close-on-exec tests for both normal and forced fallback paths. Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
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