add open_read_close() and similar stuff
diff --git a/procps/top.c b/procps/top.c
index 14a3870..06a84c9 100644
--- a/procps/top.c
+++ b/procps/top.c
@@ -448,7 +448,7 @@
 			memcpy(top + n, p, sizeof(procps_status_t));
 		}
 		if (ntop == 0) {
-			bb_error_msg_and_die("Can't find process info in /proc");
+			bb_error_msg_and_die("can't find process info in /proc");
 		}
 #ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
 		if (!prev_hist_count) {