linux: Consolidate Linux tee implementation

This patch consolidates the tee Linux syscall generation on
sysdeps/unix/sysv/linux/tee.c.  It basically removes it from
architectures auto-generation list.

Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32,
arch64-linux-gnu, arm-linux-gnueabihf, powerpc64le-linux-gnu,
sparc64-linux-gnu, and sparcv9-linux-gnu.

	* sysdeps/unix/sysv/linux/Makefile (sysdeps_routines): Add tee.
	(CFLAGS-tee.c): New rule.
	* sysdeps/unix/sysv/linux/syscalls.list: Remove tee from
	auto-generated list.
	* sysdeps/unix/sysv/linux/tee.c: New file.

4 files changed, 34 insertions, 2 deletions

diff --git a/ChangeLog b/ChangeLog
index 7bc0ce4cec..0c30af6ccd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2017-05-18  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
 
+	* sysdeps/unix/sysv/linux/Makefile (sysdeps_routines): Add tee.
+	(CFLAGS-tee.c): New rule.
+	* sysdeps/unix/sysv/linux/syscalls.list: Remove tee from
+	auto-generated list.
+	* sysdeps/unix/sysv/linux/tee.c: New file.
+
 	* nptl/Makefile (CFLAGS-nanosleep.c): New rule.
 	* posix/Makefile (CFLAGS-nanosleep.c): Likewise.
 	* sysdeps/unix/sysv/linux/nanosleep.c: New file.
diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index ad477f543b..9388623345 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -17,9 +17,10 @@ include $(firstword $(wildcard $(sysdirs:=/sysctl.mk)))
 sysdep_routines += clone umount umount2 readahead \
 		   setfsuid setfsgid epoll_pwait signalfd \
 		   eventfd eventfd_read eventfd_write prlimit \
-		   personality epoll_wait
+		   personality epoll_wait tee
 
 CFLAGS-gethostid.c = -fexceptions
+CFLAGS-tee.c = -fexceptions -fasynchronous-unwind-tables
 CFLAGS-tst-writev.c += "-DARTIFICIAL_LIMIT=(0x80000000-sysconf(_SC_PAGESIZE))"
 
 # Note that bits/mman-linux.h is listed here though the file lives in the
diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list
index 7fca6f827b..ae99acdea2 100644
--- a/sysdeps/unix/sysv/linux/syscalls.list
+++ b/sysdeps/unix/sysv/linux/syscalls.list
@@ -70,7 +70,6 @@ stime		-	stime		i:p	stime
 sysinfo		EXTRA	sysinfo		i:p	__sysinfo	sysinfo
 swapon		-	swapon		i:si	__swapon	swapon
 swapoff		-	swapoff		i:s	__swapoff	swapoff
-tee		EXTRA	tee		Ci:iiii	tee
 unshare		EXTRA	unshare		i:i	unshare
 uselib		EXTRA	uselib		i:s	__compat_uselib	uselib@GLIBC_2.0:GLIBC_2.23
 utime		-	utime		i:sP	utime
diff --git a/sysdeps/unix/sysv/linux/tee.c b/sysdeps/unix/sysv/linux/tee.c
new file mode 100644
index 0000000000..3d503fb1c9
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/tee.c
@@ -0,0 +1,26 @@
+/* Linux duplicating pipe content implementation.
+   Copyright (C) 2017 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <fcntl.h>
+#include <sysdep-cancel.h>
+
+ssize_t
+tee (int src, int dest, size_t len, unsigned int flags)
+{
+  return SYSCALL_CANCEL (tee, src, dest, len, flags);
+}