[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit

Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/build/uClibc/libc/termios/tcdrain.c b/ap/build/uClibc/libc/termios/tcdrain.c
new file mode 100644
index 0000000..e0f4231
--- /dev/null
+++ b/ap/build/uClibc/libc/termios/tcdrain.c
@@ -0,0 +1,49 @@
+/* Copyright (C) 1995, 1996, 1997, 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <termios.h>
+#include <sys/ioctl.h>
+#ifdef __UCLIBC_HAS_THREADS_NATIVE__
+#include <sysdep-cancel.h>
+#endif
+
+libc_hidden_proto(ioctl)
+
+extern __typeof(tcdrain) __libc_tcdrain;
+/* Wait for pending output to be written on FD.  */
+int __libc_tcdrain (int fd)
+{
+#ifdef __UCLIBC_HAS_THREADS_NATIVE__
+	if (SINGLE_THREAD_P)
+		/* With an argument of 1, TCSBRK for output to be drain.  */
+		return INLINE_SYSCALL (ioctl, 3, fd, TCSBRK, 1);
+
+	int oldtype = LIBC_CANCEL_ASYNC ();
+
+	/* With an argument of 1, TCSBRK for output to be drain.  */
+	int result = INLINE_SYSCALL (ioctl, 3, fd, TCSBRK, 1);
+
+	LIBC_CANCEL_RESET (oldtype);
+
+	return result;
+#else
+	return ioctl(fd, TCSBRK, 1);
+#endif
+}
+weak_alias(__libc_tcdrain,tcdrain)