From 3019bbaeb3c0156d6e9ca646850a99054963301a Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Tue, 27 Sep 2011 13:16:22 +0000
Subject: [PATCH] mksysinfo: Fix for systems that don't define TIOCSCTTY.

From Rainer Orth.

From-SVN: r179269
---
 libgo/mksysinfo.sh | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libgo/mksysinfo.sh b/libgo/mksysinfo.sh
index 2b5acd6051f..85dd33c65d0 100755
--- a/libgo/mksysinfo.sh
+++ b/libgo/mksysinfo.sh
@@ -499,6 +499,14 @@ grep '^type _passwd ' gen-sysinfo.go | \
 grep '^const _TIOC' gen-sysinfo.go | \
     sed -e 's/^\(const \)_\(TIOC[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 
+# ioctl constants.  Might fall back to 0 if TIOCNXCL is missing, too, but
+# needs handling in syscalls.exec.go.
+if ! grep '^const _TIOCSCTTY ' gen-sysinfo.go >/dev/null 2>&1; then
+  if grep '^const _TIOCNXCL ' gen-sysinfo.go >/dev/null 2>&1; then
+    echo "const TIOCSCTTY = TIOCNXCL" >> ${OUT}
+  fi
+fi
+
 # The nlmsghdr struct.
 grep '^type _nlmsghdr ' gen-sysinfo.go | \
     sed -e 's/_nlmsghdr/NlMsghdr/' \