René Scharfe <l.s.r@xxxxxx> writes: > Can opening /dev/null (or NUL on Windows) multiple times instead of dup'ing > cause issues? Can we e.g. lock ourselves out? 258e93a1 (daemon: if one of the standard fds is missing open it to /dev/null, 2006-07-13) unfortunately does not explain why it was done this way. Given that "command </dev/null >/dev/null 2>/dev/null" should work fine, I suspect that the "once we open a throw-away descriptor, instead of opening the same file again, dup the fd and reuse" was done not for correctness but for performance, under the assumption that open() is more expensive?
