[PATCH] service: systemd: use correct format for LISTEN_FDNAMES

[Bastien Rivière]

Hello,

This is a patch for shepherd's "make-systemd-constructor" which creates an 
invalid environment variable when there is more than one listen endpoint.

Best regards,
Bastien
From fdabd4ee6d43e32cbf9bd85282ff66138ce652b9 Mon Sep 17 00:00:00 2001
From: Bastien Riviere <m...@babariviere.com>
Date: Sat, 7 May 2022 01:08:28 +0200
Subject: [PATCH] service: systemd: use correct format for LISTEN_FDNAMES

As in the documentation, LISTEN_FDNAMES is expected to be a "colon-separated
list of names".
This patch add the missing delimiter when joining to LISTEN_FDNAMES.

This fixes issues with services, like gpg-agent, which produces this kind of
error:

> [gpg-agent] Fatal: number of items in LISTEN_FDNAMES (1) does not match LISTEN_FDS (4) in --supervised mode
---
 modules/shepherd/service.scm | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/modules/shepherd/service.scm b/modules/shepherd/service.scm
index 81bd667..f343938 100644
--- a/modules/shepherd/service.scm
+++ b/modules/shepherd/service.scm
@@ -352,7 +352,7 @@ wire."
 (define-method (running? (obj <service>))
   (and (service-running-value obj) #t))
 
-;; Return a list of all actions implemented by OBJ. 
+;; Return a list of all actions implemented by OBJ.
 (define-method (action-list (obj <service>))
   (map action-name (slot-ref obj 'actions)))
 
@@ -1594,7 +1594,8 @@ This must be paired with @code{make-systemd-destructor}."
                                            (number->string (length sockets)))
                             (string-append "LISTEN_FDNAMES="
                                            (string-join
-                                            (map endpoint-name endpoints)))))
+                                            (map endpoint-name endpoints)
+                                            ":"))))
            (running   sockets))
       (spawn-fiber
        (lambda ()
-- 
m...@babariviere.com