From 524e0aa174224641bc6807ec112e46f98e27cfe0 Mon Sep 17 00:00:00 2001
From: axel <axel@liljencrantz.se>
Date: Thu, 11 May 2006 21:58:46 +1000
Subject: [PATCH] Add fallback del_curterm which does nothing, used in
 preference to BSD curses del_curterm, which seems to do a double-free

darcs-hash:20060511115846-ac50b-8d5fc054d31cff637d30e858ae8ffe2b1d1e8c03.gz
---
 configure.ac | 14 ++++++++++++++
 fallback.c   |  8 ++++++++
 fallback.h   |  8 ++++++++
 3 files changed, 30 insertions(+)

diff --git a/configure.ac b/configure.ac
index 6fd53c511..706a69bcf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -389,6 +389,20 @@ else
     AC_MSG_RESULT(no)
 fi
 
+# Check if we are using basic BSD curses - in that case we redefine
+# del_curterm as a no-op, to avoid a double-free
+
+AC_MSG_CHECKING([If we are using BSD curses])
+case $target_os in
+	*bsd*)
+		AC_MSG_RESULT(yes)
+		AC_CHECK_LIB( ncurses, del_curterm, true, [AC_DEFINE([HAVE_BROKEN_DEL_CURTERM],[1],[We are using basic BSD curses, redefine del_curterm to a no-op to avoid a double-free bug])])
+		;;
+	*)
+		AC_MSG_RESULT(no)
+		;;
+esac
+
 # Tell the world what we know
 AC_CONFIG_FILES([Makefile fish.spec doc_src/fish.1 doc_src/Doxyfile etc/fish etc/fish_interactive.fish share/fish seq])
 AC_OUTPUT
diff --git a/fallback.c b/fallback.c
index d98eb0360..3024ae2c6 100644
--- a/fallback.c
+++ b/fallback.c
@@ -997,3 +997,11 @@ wcslcpy(wchar_t *dst, const wchar_t *src, size_t siz)
 
 #endif
 
+#ifdef HAVE_BROKEN_DEL_CURTERM
+
+int del_curterm(TERMINAL *oterm)
+{
+}
+
+#endif
+
diff --git a/fallback.h b/fallback.h
index e3952ec3a..10a071213 100644
--- a/fallback.h
+++ b/fallback.h
@@ -271,4 +271,12 @@ size_t wcslcpy( wchar_t *dst, const wchar_t *src, size_t siz );
 
 #endif
 
+#ifdef HAVE_BROKEN_DEL_CURTERM
+
+/**
+   BSD del_curterm seems to do a double-free. We redefine it as a no-op
+*/
+int del_curterm(TERMINAL *oterm);
+#endif
+
 #endif