Function isatty

src/backend/linux_raw/termios/syscalls.rs:362–368

(fd: BorrowedFd<'_>)

#[inline]
pub(crate) fn isatty(fd: BorrowedFd<'_>) -> bool {
    // On error, Linux will return either `EINVAL` (2.6.32) or `ENOTTY`
    // (otherwise), because we assume we're never passing an invalid
    // file descriptor (which would get `EBADF`). Either way, an error
    // means we don't have a tty.
    tcgetwinsize(fd).is_ok()
}

#[cfg(feature = "alloc")]
#[cfg(feature = "fs")]