isatty.rs.html -- source
Description: Source to the Rust file `src/libtest/helpers/isatty.rs`.
Keywords: rust, rustlang, rust-lang

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    //! Helper module which provides a function to test
    //! if stdout is a tty.

    #[cfg(any(
        target_os = "cloudabi",
        target_os = "hermit",
        all(target_arch = "wasm32", not(target_os = "emscripten")),
        all(target_vendor = "fortanix", target_env = "sgx")
    ))]
    pub fn stdout_isatty() -> bool {
        // FIXME: Implement isatty on SGX
        false
    }
    #[cfg(unix)]
    pub fn stdout_isatty() -> bool {
        unsafe { libc::isatty(libc::STDOUT_FILENO) != 0 }
    }
    #[cfg(windows)]
    pub fn stdout_isatty() -> bool {
        type DWORD = u32;
        type BOOL = i32;
        type HANDLE = *mut u8;
        type LPDWORD = *mut u32;
        const STD_OUTPUT_HANDLE: DWORD = -11i32 as DWORD;
        extern "system" {
            fn GetStdHandle(which: DWORD) -> HANDLE;
            fn GetConsoleMode(hConsoleHandle: HANDLE, lpMode: LPDWORD) -> BOOL;
        }
        unsafe {
            let handle = GetStdHandle(STD_OUTPUT_HANDLE);
            let mut out = 0;
            GetConsoleMode(handle, &mut out) != 0
        }
    }