Origin: community/qemu: fix qemu-guest-agent patch
https://gitlab.alpinelinux.org/alpine/aports/-/blob/b720d51ec844d4754dd5b29084350aa1f5c9a74d/community/qemu/guest-agent-shutdown.patch
---
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -218,43 +218,21 @@ void qmp_guest_shutdown(const char *mode
     const char *shutdown_flag;
     Error *local_err = NULL;
 
-#ifdef CONFIG_SOLARIS
-    const char *powerdown_flag = "-i5";
-    const char *halt_flag = "-i0";
-    const char *reboot_flag = "-i6";
-#elif defined(CONFIG_BSD)
-    const char *powerdown_flag = "-p";
-    const char *halt_flag = "-h";
-    const char *reboot_flag = "-r";
-#else
-    const char *powerdown_flag = "-P";
-    const char *halt_flag = "-H";
-    const char *reboot_flag = "-r";
-#endif
+    const char *argv[] = {NULL, NULL};
 
     slog("guest-shutdown called, mode: %s", mode);
     if (!mode || strcmp(mode, "powerdown") == 0) {
-        shutdown_flag = powerdown_flag;
+        argv[0] = "poweroff";
     } else if (strcmp(mode, "halt") == 0) {
-        shutdown_flag = halt_flag;
+        argv[0] = "halt";
     } else if (strcmp(mode, "reboot") == 0) {
-        shutdown_flag = reboot_flag;
+        argv[0] = "reboot";
     } else {
         error_setg(errp,
                    "mode is invalid (valid values are: halt|powerdown|reboot");
         return;
     }
 
-    const char *argv[] = {"/sbin/shutdown",
-#ifdef CONFIG_SOLARIS
-                          shutdown_flag, "-g0", "-y",
-#elif defined(CONFIG_BSD)
-                          shutdown_flag, "+0",
-#else
-                          "-h", shutdown_flag, "+0",
-#endif
-                          "hypervisor initiated shutdown", (char *) NULL};
-
     ga_run_command(argv, NULL, "shutdown", &local_err);
     if (local_err) {
         error_propagate(errp, local_err);