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    #[cfg(any(target_os = "dragonfly",
              target_os = "freebsd",
              target_os = "ios",
              target_os = "linux",
              target_os = "macos",
              target_os = "netbsd"))]
    pub mod aio;

    #[cfg(any(target_os = "android", target_os = "linux"))]
    pub mod epoll;

    #[cfg(any(target_os = "dragonfly",
              target_os = "freebsd",
              target_os = "ios",
              target_os = "macos",
              target_os = "netbsd",
              target_os = "openbsd"))]
    pub mod event;

    #[cfg(target_os = "linux")]
    pub mod eventfd;

    #[cfg(any(target_os = "android",
              target_os = "dragonfly",
              target_os = "freebsd",
              target_os = "ios",
              target_os = "linux",
              target_os = "macos",
              target_os = "netbsd",
              target_os = "openbsd"))]
    #[macro_use]
    pub mod ioctl;

    #[cfg(target_os = "linux")]
    pub mod memfd;

    pub mod mman;

    pub mod pthread;

    #[cfg(any(target_os = "android",
              target_os = "dragonfly",
              target_os = "freebsd",
              target_os = "linux",
              target_os = "macos",
              target_os = "netbsd",
              target_os = "openbsd"))]
    pub mod ptrace;

    #[cfg(target_os = "linux")]
    pub mod quota;

    #[cfg(any(target_os = "linux"))]
    pub mod reboot;

    pub mod select;

    #[cfg(any(target_os = "android",
              target_os = "freebsd",
              target_os = "ios",
              target_os = "linux",
              target_os = "macos"))]
    pub mod sendfile;

    pub mod signal;

    #[cfg(any(target_os = "android", target_os = "linux"))]
    pub mod signalfd;

    pub mod socket;

    pub mod stat;

    #[cfg(any(target_os = "android", target_os = "linux", target_os = "macos"))]
    pub mod statfs;

    pub mod statvfs;

    #[cfg(any(target_os = "android", target_os = "linux"))]
    pub mod sysinfo;

    pub mod termios;

    pub mod time;

    pub mod uio;

    pub mod utsname;

    pub mod wait;

    #[cfg(any(target_os = "android", target_os = "linux"))]
    pub mod inotify;

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