A question to lib/libc/gen/daemon.c

[Alexander Farber]

In the file /usr/src/lib/libc/gen/daemon.c

       if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
                (void)dup2(fd, STDIN_FILENO);
                (void)dup2(fd, STDOUT_FILENO);
                (void)dup2(fd, STDERR_FILENO);
                if (fd > 2)
                        (void)close (fd);
        }

is same as:

       if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
                (void)dup2(fd, 0);
                (void)dup2(fd, 1);
                (void)dup2(fd, 2);
                if (fd > 2)
                        (void)close (fd);
        }

right? What is this last check (fd > 2) needed for? Isn't fd always > 2, 
because the first 3 are already taken by the STDxxx streams at the
program start?

Thanks
Alex