#~(and (defined? 'make-inetd-constructor)
(not (string=? (@ (shepherd config) Version) "0.9.0"))))
+ (define ipv6-support?
+ ;; Expression that returns true if IPv6 support is available.
+ #~(catch 'system-error
+ (lambda ()
+ (let ((sock (socket AF_INET6 SOCK_STREAM 0)))
+ (close-port sock)
+ #t))
+ (const #f)))
+
(list (shepherd-service
(documentation "OpenSSH server.")
(requirement '(syslogd loopback))
(start #~(if #$inetd-style?
(make-inetd-constructor
(append #$openssh-command '("-i"))
- (list (endpoint
+ (cons (endpoint
(make-socket-address AF_INET INADDR_ANY
#$port-number))
- (endpoint
- (make-socket-address AF_INET6 IN6ADDR_ANY
- #$port-number)))
+ (if #$ipv6-support?
+ (list
+ (endpoint
+ (make-socket-address AF_INET6 IN6ADDR_ANY
+ #$port-number)))
+ '()))
#:max-connections #$max-connections)
(make-forkexec-constructor #$openssh-command
#:pid-file #$pid-file)))