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// unistd.h use std::ffi::{c_int, c_void}; extern { // https://man7.org/linux/man-pages/man2/close.2.html pub fn close(fd: c_int) -> c_int; // https://man7.org/linux/man-pages/man2/write.2.html pub fn write(fd: c_int, buf: *const c_void, count: usize) -> isize; }