library/test/src/helpers/isatty.rs

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

cfg_if::cfg_if! {
    if #[cfg(unix)] {
        pub fn stdout_isatty() -> bool {
            unsafe { libc::isatty(libc::STDOUT_FILENO) != 0 }
        }
    } else if #[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
            }
        }
    } else {
        // FIXME: Implement isatty on SGX
        pub fn stdout_isatty() -> bool {
            false
        }
    }
}