udev/mtd_probe: convert to run()

src/udev/mtd_probe/mtd_probe.c

@@ -31,6 +31,7 @@
 
 #include "alloc-util.h"
 #include "fd-util.h"
+#include "main-func.h"
 #include "mtd_probe.h"
 
 static const char *arg_device = NULL;
@@ -62,28 +63,23 @@ static int parse_argv(int argc, char *argv[]) {
         return 1;
 }
 
-int main(int argc, char** argv) {
+static int run(int argc, char** argv) {
         _cleanup_close_ int mtd_fd = -EBADF;
         mtd_info_t mtd_info;
         int r;
 
         r = parse_argv(argc, argv);
         if (r <= 0)
-                return r < 0 ? EXIT_FAILURE : 0;
+                return r;
 
         mtd_fd = open(argv[1], O_RDONLY|O_CLOEXEC|O_NOCTTY);
-        if (mtd_fd < 0) {
-                log_error_errno(errno, "Failed to open: %m");
-                return EXIT_FAILURE;
-        }
+        if (mtd_fd < 0)
+                return log_error_errno(errno, "Failed to open: %m");
 
-        if (ioctl(mtd_fd, MEMGETINFO, &mtd_info) < 0) {
-                log_error_errno(errno, "Failed to issue MEMGETINFO ioctl: %m");
-                return EXIT_FAILURE;
-        }
+        if (ioctl(mtd_fd, MEMGETINFO, &mtd_info) < 0)
+                return log_error_errno(errno, "MEMGETINFO ioctl failed: %m");
 
-        if (probe_smart_media(mtd_fd, &mtd_info) < 0)
-                return EXIT_FAILURE;
-
-        return EXIT_SUCCESS;
+        return probe_smart_media(mtd_fd, &mtd_info);
 }
+
+DEFINE_MAIN_FUNCTION(run);