systemctl: add --value option

With this option, systemctl will only print the rhs in show:
$ systemctl show -p Wants,After elogind-journald --value
elogind-journald.socket ...
elogind-journald-dev-log.socket ...

This is useful in scripts, because the need to call awk or similar
is removed.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/login/loginctl.c b/src/login/loginctl.c
index 6812ec5d4..35310cf57 100644
--- a/src/login/loginctl.c
+++ b/src/login/loginctl.c
@@ -793,7 +793,7 @@ static int print_property(const char *name, sd_bus_message *m, const char *conte
                 break;
         }
 
-        r = bus_print_property(name, m, arg_all);
+        r = bus_print_property(name, m, false, arg_all);
         if (r < 0)
                 return bus_log_parse_error(r);