From 67db04d8d8ada0aa2fb7dfdf83f3a408ad5a01dc Mon Sep 17 00:00:00 2001
From: zoulasc <christos@zoulas.com>
Date: Mon, 20 Jan 2020 11:29:01 -0500
Subject: [PATCH] Prevent phup() and record() from being executed more than
 once because writing history recursively deadlocks (Brett Frankenberger)
diff --git a/sh.c b/sh.c
index dd87172..75ba62d 100644
--- a/sh.c
+++ b/sh.c
@@ -1839,6 +1839,10 @@ exitstat(void)
 void
 phup(void)
 {
+    static int again = 0;
+    if (again++)
+	return;
+
     if (loginsh) {
 	setcopy(STRlogout, STRhangup, VAR_READWRITE);
 #ifdef _PATH_DOTLOGOUT
@@ -2516,6 +2520,10 @@ defaultpath(void)
 static void
 record(void)
 {
+    static int again = 0;
+    if (again++)
+	return;
+
     if (!fast) {
 	recdirs(NULL, adrof(STRsavedirs) != NULL);
 	rechist(NULL, adrof(STRsavehist) != NULL);