termios: Consolidate tcflow symbolic constants

This patch consolidates the termios symbolic constants for use with tcflow
in its own header.  The Linux generic implementation values match the
kernel UAPI and each architecture with deviate values have their own
implementation (currently only mips).

No semantic change is expected, checked on a build against x86_64-linux-gnu,
alpha-linux-gnu, mips64-linux-gnu, and sparc64-linux-gnu.

	* sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Add
	termios-tcflow.h.
	* sysdeps/unix/sysv/linux/bits/termios-tcflow.h: New file.
	* sysdeps/unix/sysv/linux/mips/bits/termios-tcflow.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/termios.h (TCSANOW, TCSADRAIN,
	TCSAFLUSH): Move to termios-tcflow.h.
	* sysdeps/unix/sysv/linux/alpha/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/termios.h: Likewise.

8 files changed, 58 insertions, 23 deletions

diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index bd17a57..feddcab 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -47,7 +47,7 @@ sysdep_headers += sys/mount.h sys/acct.h sys/sysctl.h \
 		  bits/termios-struct.h bits/termios-c_cc.h \
 		  bits/termios-c_iflag.h bits/termios-c_oflag.h \
 		  bits/termios-baud.h bits/termios-c_cflag.h \
-		  bits/termios-c_lflag.h
+		  bits/termios-c_lflag.h bits/termios-tcflow.h
 
 tests += tst-clone tst-clone2 tst-clone3 tst-fanotify tst-personality \
 	 tst-quota tst-sync_file_range tst-sysconf-iov_max tst-ttyname \
diff --git a/sysdeps/unix/sysv/linux/alpha/bits/termios.h b/sysdeps/unix/sysv/linux/alpha/bits/termios.h
index 95e40d8..fc47547 100644
--- a/sysdeps/unix/sysv/linux/alpha/bits/termios.h
+++ b/sysdeps/unix/sysv/linux/alpha/bits/termios.h
@@ -66,11 +66,7 @@ typedef unsigned int	tcflag_t;
 #define	TCOFLUSH	1
 #define	TCIOFLUSH	2
 
-/* Values for the OPTIONAL_ACTIONS argument to `tcsetattr'.  */
-#define	TCSANOW		0
-#define	TCSADRAIN	1
-#define	TCSAFLUSH	2
-
+#include <bits/termios-tcflow.h>
 
 #define _IOT_termios /* Hurd ioctl type field.  */ \
   _IOT (_IOTS (cflag_t), 4, _IOTS (cc_t), NCCS, _IOTS (speed_t), 2)
diff --git a/sysdeps/unix/sysv/linux/bits/termios-tcflow.h b/sysdeps/unix/sysv/linux/bits/termios-tcflow.h
new file mode 100644
index 0000000..3832d50
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/bits/termios-tcflow.h
@@ -0,0 +1,26 @@
+/* termios tcflag symbolic contants definitions.  Linux/generic version.
+   Copyright (C) 2019 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/>.  */
+
+#ifndef _TERMIOS_H
+# error "Never include <bits/termios-tcflow.h> directly; use <termios.h> instead."
+#endif
+
+/* tcsetattr uses these.  */
+#define	TCSANOW		0
+#define	TCSADRAIN	1
+#define	TCSAFLUSH	2
diff --git a/sysdeps/unix/sysv/linux/bits/termios.h b/sysdeps/unix/sysv/linux/bits/termios.h
index e74618d..a2ce092 100644
--- a/sysdeps/unix/sysv/linux/bits/termios.h
+++ b/sysdeps/unix/sysv/linux/bits/termios.h
@@ -71,11 +71,7 @@ typedef unsigned int	tcflag_t;
 #define	TCOFLUSH	1
 #define	TCIOFLUSH	2
 
-/* tcsetattr uses these */
-#define	TCSANOW		0
-#define	TCSADRAIN	1
-#define	TCSAFLUSH	2
-
+#include <bits/termios-tcflow.h>
 
 #define _IOT_termios /* Hurd ioctl type field.  */ \
   _IOT (_IOTS (cflag_t), 4, _IOTS (cc_t), NCCS, _IOTS (speed_t), 2)
diff --git a/sysdeps/unix/sysv/linux/mips/bits/termios-tcflow.h b/sysdeps/unix/sysv/linux/mips/bits/termios-tcflow.h
new file mode 100644
index 0000000..68b2972
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mips/bits/termios-tcflow.h
@@ -0,0 +1,26 @@
+/* termios local mode definitions.  Linux/mips version.
+   Copyright (C) 2019 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/>.  */
+
+#ifndef _TERMIOS_H
+# error "Never include <bits/termios-tcflow.h> directly; use <termios.h> instead."
+#endif
+
+/* tcsetattr uses these */
+#define	TCSANOW		0x540e	/* Same as TCSETS; change immediately.  */
+#define	TCSADRAIN	0x540f	/* Same as TCSETSW; change when pending output is written.  */
+#define	TCSAFLUSH	0x5410	/* Same as TCSETSF; flush pending input before changing.  */
diff --git a/sysdeps/unix/sysv/linux/mips/bits/termios.h b/sysdeps/unix/sysv/linux/mips/bits/termios.h
index 8f6c918..7f38f85 100644
--- a/sysdeps/unix/sysv/linux/mips/bits/termios.h
+++ b/sysdeps/unix/sysv/linux/mips/bits/termios.h
@@ -71,10 +71,7 @@ typedef unsigned int	tcflag_t;
 #define	TCOFLUSH	1	/* Discard data written but not yet sent.  */
 #define	TCIOFLUSH	2	/* Discard all pending data.  */
 
-/* tcsetattr uses these */
-#define	TCSANOW		0x540e	/* Same as TCSETS; change immediately.  */
-#define	TCSADRAIN	0x540f	/* Same as TCSETSW; change when pending output is written.  */
-#define	TCSAFLUSH	0x5410	/* Same as TCSETSF; flush pending input before changing.  */
+#include <bits/termios-tcflow.h>
 
 #define _IOT_termios /* Hurd ioctl type field.  */ \
   _IOT (_IOTS (cflag_t), 4, _IOTS (cc_t), NCCS, _IOTS (speed_t), 2)
diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/termios.h b/sysdeps/unix/sysv/linux/powerpc/bits/termios.h
index 65dad31..18c27fe 100644
--- a/sysdeps/unix/sysv/linux/powerpc/bits/termios.h
+++ b/sysdeps/unix/sysv/linux/powerpc/bits/termios.h
@@ -65,10 +65,7 @@ typedef unsigned int	tcflag_t;
 #define	TCOFLUSH	1
 #define	TCIOFLUSH	2
 
-/* Values for the OPTIONAL_ACTIONS argument to `tcsetattr'.  */
-#define	TCSANOW		0
-#define	TCSADRAIN	1
-#define	TCSAFLUSH	2
+#include <bits/termios-tcflow.h>
 
 #ifdef __USE_MISC
 
diff --git a/sysdeps/unix/sysv/linux/sparc/bits/termios.h b/sysdeps/unix/sysv/linux/sparc/bits/termios.h
index 12dc706..71d3c6e 100644
--- a/sysdeps/unix/sysv/linux/sparc/bits/termios.h
+++ b/sysdeps/unix/sysv/linux/sparc/bits/termios.h
@@ -71,7 +71,4 @@ typedef unsigned int tcflag_t;
 #define	TCOFLUSH	1
 #define	TCIOFLUSH	2
 
-/* tcsetattr uses these */
-#define	TCSANOW		0
-#define	TCSADRAIN	1
-#define	TCSAFLUSH	2
+#include <bits/termios-tcflow.h>