Hello Clément,

Commit 9fc2922794ffaae48e0a7c536e530ea2e0d46cf3 adds a loop to the nginx
service that checks for /var/run/nginx/pid.  Unfortunately, on berlin
that loop never ends because the file is not created (on berlin we use a
“hand-written” nginx config file that lacks a “pid” directive; see
guix-maintenance.git.)

I think there are two things to address:

  1. Don’t look for a PID file when passed a hand-written config file;

  2. Make sure the loop always terminates, similar to what
    ‘make-forkexec-constructor’ does.

The patch below fixes that.  The second patch fixes the ‘stop’
procedure.

Thoughts?

Ludo’.