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Patch: tcsh-6.20.00-owl-no-TIOCSTI.diff
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diff -burN tcsh-6.20.00.orig/ed.chared.c tcsh-6.20.00/ed.chared.c
--- tcsh-6.20.00.orig/ed.chared.c 2015-08-19 17:29:55.000000000 +0300
+++ tcsh-6.20.00/ed.chared.c 2017-07-20 15:59:24.567159098 +0300
@@ -3387,7 +3387,7 @@
CCRETVAL
e_stuff_char(Char c)
{
-#ifdef TIOCSTI
+#if 0 /* avoid CVE-2017-5226 issues */
int was_raw = Tty_raw_mode;
char buf[MB_LEN_MAX];
size_t i, len;