bash-completion: list only valid signal names

Fixup for #1999.

diff --git a/shell-completion/bash/systemd-nspawn b/shell-completion/bash/systemd-nspawn
index 2636666b5d9ca30ca1b4f53bdb2e849e38e99374..429e712eb3f526fa63987ebbf08923951625fe05 100644 (file)
--- a/shell-completion/bash/systemd-nspawn
+++ b/shell-completion/bash/systemd-nspawn
@@ -133,7 +133,8 @@ _systemd_nspawn() {
                                 comps=$( compgen -A file -- "$cur" )
                         ;;
                         --kill-signal)
-                                comps=$(compgen -A signal)
+                                _signals
+                                return
                         ;;
                 esac
                 COMPREPLY=( $(compgen -W '$comps' -- "$cur") )