method

echo=

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echo=(p1) public

Enables/disables echo back. On some platforms, all combinations of this flags and raw/cooked mode may not be valid.

You must require ‘io/console’ to use this method.

static VALUE
console_set_echo(VALUE io, VALUE f)
{
    conmode t;
    rb_io_t *fptr;
    int fd;

    GetOpenFile(io, fptr);
    fd = GetReadFD(fptr);
    if (!getattr(fd, &t)) rb_sys_fail(0);
    if (RTEST(f))
        set_echo(&t, NULL);
    else
        set_noecho(&t, NULL);
    if (!setattr(fd, &t)) rb_sys_fail(0);
    return io;
}

echo=

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