systemctl,loginctl,machinectl: use a shared helper for arg_signal

I seems frivolous to yet another two -util.[ch] files, but the helper
should be in shared/ and it doesn't seem to fit anywhere else.

1 files changed, 4 insertions, 9 deletions

diff --git a/src/machine/machinectl.c b/src/machine/machinectl.c
index 3d6048eaff..1ae10e5880 100644
--- a/src/machine/machinectl.c
+++ b/src/machine/machinectl.c
@@ -39,6 +39,7 @@
 #include "mkdir.h"
 #include "nulstr-util.h"
 #include "pager.h"
+#include "parse-argument.h"
 #include "parse-util.h"
 #include "path-util.h"
 #include "pretty-print.h"
@@ -2715,15 +2716,9 @@ static int parse_argv(int argc, char *argv[]) {
                         break;
 
                 case 's':
-                        if (streq(optarg, "help")) {
-                                DUMP_STRING_TABLE(signal, int, _NSIG);
-                                return 0;
-                        }
-
-                        r = signal_from_string(optarg);
-                        if (r < 0)
-                                return log_error_errno(r, "Failed to parse signal string %s.", optarg);
-                        arg_signal = r;
+                        r = parse_signal_argument(optarg, &arg_signal);
+                        if (r <= 0)
+                                return r;
                         break;
 
                 case ARG_NO_ASK_PASSWORD: