Stop using TRUE and FALSE for exit status.
diff --git a/ps.c b/ps.c
index df32161..4998e15 100644
--- a/ps.c
+++ b/ps.c
@@ -183,7 +183,7 @@
 		fprintf(stdout, "\n");
 	}
 	closedir(dir);
-	return(TRUE);
+	return EXIT_SUCCESS;
 }