/dev/stderr and /proc/self/fd/2 unknown in systemd unit about clipmenu

[cdown]

I think the only solution here is to discard these and go back to /dev/null, sadly. I can't think of any other way to get xclip to write to stderr directly instead of trying to reopen through /dev/stderr and the like.

I've at least kept stderr where possible.

[cdown]

By changing the _xsel function to look like this:

_xsel() {
    xsel --logfile "$xsel_log" "$@" &
    kill -STOP "$!"
    ls -l /proc/"$!"/fd/
    kill -CONT "$!"
    wait
}

We can see that the fds look like this:

Oct 29 10:29:14 roujiamo clipmenud[10899]: total 0
Oct 29 10:29:14 roujiamo clipmenud[10899]: lr-x------ 1 cdown cdown 64 Oct 29 10:29 0 -> pipe:[417750]
Oct 29 10:29:14 roujiamo clipmenud[10899]: lrwx------ 1 cdown cdown 64 Oct 29 10:29 1 -> socket:[417708]
Oct 29 10:29:14 roujiamo clipmenud[10899]: l-wx------ 1 cdown cdown 64 Oct 29 10:29 10 -> /run/user/1000/clipmenu.4.cdown/lock
Oct 29 10:29:14 roujiamo clipmenud[10899]: lrwx------ 1 cdown cdown 64 Oct 29 10:29 2 -> socket:[417708]
Oct 29 10:29:14 roujiamo clipmenud[10899]: xsel: error opening logfile /proc/self/fd/2 for writing: No such device or address

This makes sense. You can't indirectly use a filename which goes to a socket, you have to use the socket directly.

Hmm.