libc_tools

这个crate包装了一些libc中的系统调用

感谢libc，这个crate有一些对libc的包装：fork等

match Fork::fork() {
    ForkPid::Parent((parent, children)) => {}
    ForkPid::Children((parent, children)) => {}
    ForkPid::None => panic!("fork failed!")
}

forkpt dup dup2（以及用于多个fd的dup2s）

let x : () = Dup::dup2s(&[...olds], &[...news]).unwrap();

popen 使用方法

unsafe {
    let popen = Popen::arg("date").exec().unwrap();
    let mut buf = [0 as u8; 4096];
    let mut p;
    while {
        p = fgets(buf.as_mut_ptr() as *mut i8, 4096, popen.stdout);
        p != std::ptr::null_mut::<i8>() && *p != '\0' as i8
    } {
        assert!(strlen(p) != 0);
    }
    println!("");
    while {
        p = fgets(buf.as_mut_ptr() as *mut i8, 4096, popen.stderr);
        p != std::ptr::null_mut::<i8>() && *p != '\0' as i8
    } {
        assert!(strlen(p) != 0);
    }
}