From 5ffce08c61010cd8294feaf611e7c6efee8694ea Mon Sep 17 00:00:00 2001
From: Tatsuya Kinoshita <tats@debian.org>
Date: Thu, 12 Jan 2023 19:39:10 +0900
Subject: [PATCH] Avoid modifying read-only rc_dir

---
 rc.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/rc.c b/rc.c
index 37fb087..82ba65d 100644
--- a/rc.c
+++ b/rc.c
@@ -1352,9 +1352,11 @@ init_rc(void)
     if (rc_dir != NULL)
 	goto open_rc;
 
-    if ((rc_dir = getenv("W3M_DIR")) == NULL || *rc_dir == '\0') {
-	rc_dir = RC_DIR;
-    }
+    rc_dir = allocStr(getenv("W3M_DIR"), -1);
+    if (rc_dir == NULL || *rc_dir == '\0')
+	rc_dir = allocStr(RC_DIR, -1);
+    if (rc_dir == NULL || *rc_dir == '\0')
+	goto rc_dir_err;
     rc_dir = expandPath(rc_dir);
 
     i = strlen(rc_dir);