bootctl: return 0 instead of EXIT_SUCCESS

src/boot/bootctl-reboot-to-firmware.c

@@ -11,7 +11,7 @@ int verb_reboot_to_firmware(int argc, char *argv[], void *userdata) {
                 r = efi_get_reboot_to_firmware();
                 if (r > 0) {
                         puts("active");
-                        return EXIT_SUCCESS; /* success */
+                        return 0; /* success */
                 }
                 if (r == 0) {
                         puts("supported");

src/boot/bootctl-uki.c

@@ -211,7 +211,7 @@ int verb_kernel_identify(int argc, char *argv[], void *userdata) {
         else
                 puts("pe");
 
-        return EXIT_SUCCESS;
+        return 0;
 }
 
 int verb_kernel_inspect(int argc, char *argv[], void *userdata) {
@@ -236,5 +236,5 @@ int verb_kernel_inspect(int argc, char *argv[], void *userdata) {
         } else
                 puts("Kernel Type: pe");
 
-        return EXIT_SUCCESS;
+        return 0;
 }

src/boot/bootctl.c

@@ -489,7 +489,7 @@ static int run(int argc, char *argv[]) {
                         return log_oom();
 
                 puts(path);
-                return EXIT_SUCCESS;
+                return 0;
         }
 
         /* Open up and mount the image */