diff --git a/usr/gen_init_cpio.c b/usr/gen_init_cpio.c
index af0f22f..aca6edc 100644
--- a/usr/gen_init_cpio.c
+++ b/usr/gen_init_cpio.c
@@ -303,7 +303,7 @@
 	int retval;
 	int rc = -1;
 	int namesize;
-	int i;
+	unsigned int i;
 
 	mode |= S_IFREG;
 
@@ -381,25 +381,28 @@
 
 static char *cpio_replace_env(char *new_location)
 {
-       char expanded[PATH_MAX + 1];
-       char env_var[PATH_MAX + 1];
-       char *start;
-       char *end;
+	char expanded[PATH_MAX + 1];
+	char env_var[PATH_MAX + 1];
+	char *start;
+	char *end;
 
-       for (start = NULL; (start = strstr(new_location, "${")); ) {
-               end = strchr(start, '}');
-               if (start < end) {
-                       *env_var = *expanded = '\0';
-                       strncat(env_var, start + 2, end - start - 2);
-                       strncat(expanded, new_location, start - new_location);
-                       strncat(expanded, getenv(env_var), PATH_MAX);
-                       strncat(expanded, end + 1, PATH_MAX);
-                       strncpy(new_location, expanded, PATH_MAX);
-               } else
-                       break;
-       }
+	for (start = NULL; (start = strstr(new_location, "${")); ) {
+		end = strchr(start, '}');
+		if (start < end) {
+			*env_var = *expanded = '\0';
+			strncat(env_var, start + 2, end - start - 2);
+			strncat(expanded, new_location, start - new_location);
+			strncat(expanded, getenv(env_var),
+				PATH_MAX - strlen(expanded));
+			strncat(expanded, end + 1,
+				PATH_MAX - strlen(expanded));
+			strncpy(new_location, expanded, PATH_MAX);
+			new_location[PATH_MAX] = 0;
+		} else
+			break;
+	}
 
-       return new_location;
+	return new_location;
 }