Move scoped_ignore_sigttou to gdbsupport/

A following patch will want to use scoped_ignore_sigttou in code
shared between GDB and GDBserver.  Move it under gdbsupport/.

Note that despite what inflow.h/inflow.c's first line says, inflow.c
is no longer about ptrace, it is about terminal management.  Some
other files were unnecessarily including inflow.h, I guess a leftover
from the days when inflow.c really was about ptrace.  Those inclusions
are simply dropped.

gdb/ChangeLog:
yyyy-mm-dd  Pedro Alves  <pedro@palves.net>

	* Makefile.in (HFILES_NO_SRCDIR): Remove inflow.h.
	* inf-ptrace.c, inflow.c, procfs.c: Don't include "inflow.h".
	* inflow.h: Delete, moved to gdbsupport/ under a different name.
	* ser-unix.c: Don't include "inflow.h".  Include
	"gdbsupport/scoped_ignore_sigttou.h".

gdbsupport/ChangeLog:
yyyy-mm-dd  Pedro Alves  <pedro@palves.net>

	* scoped_ignore_sigttou.h: New file, moved from gdb/ and renamed.

Change-Id: Ie390abf42c3a78bec6d282ad2a63edd3e623559a

gdb/ChangeLog

@@ -1,3 +1,11 @@
+2021-06-17  Pedro Alves  <pedro@palves.net>
+
+	* Makefile.in (HFILES_NO_SRCDIR): Remove inflow.h.
+	* inf-ptrace.c, inflow.c, procfs.c: Don't include "inflow.h".
+	* inflow.h: Delete, moved to gdbsupport/ under a different name.
+	* ser-unix.c: Don't include "inflow.h".  Include
+	"gdbsupport/scoped_ignore_sigttou.h".
+
 2021-06-17  Pedro Alves  <pedro@palves.net>
 
 	* tui/tui-io.c (tui_dispatch_mouse_event): New, factored out from

gdb/Makefile.in

@@ -1336,7 +1336,6 @@ HFILES_NO_SRCDIR = \
 	inf-ptrace.h \
 	infcall.h \
 	inferior.h \
-	inflow.h \
 	inline-frame.h \
 	interps.h \
 	jit.h \

gdb/inf-ptrace.c

@@ -20,7 +20,6 @@
 #include "defs.h"
 #include "command.h"
 #include "inferior.h"
-#include "inflow.h"
 #include "terminal.h"
 #include "gdbcore.h"
 #include "regcache.h"

gdb/inflow.c

@@ -29,12 +29,12 @@
 #include <fcntl.h>
 #include "gdbsupport/gdb_select.h"
 
-#include "inflow.h"
 #include "gdbcmd.h"
 #ifdef HAVE_TERMIOS_H
 #include <termios.h>
 #endif
 #include "gdbsupport/job-control.h"
+#include "gdbsupport/scoped_ignore_sigttou.h"
 
 #ifdef HAVE_SYS_IOCTL_H
 #include <sys/ioctl.h>

gdb/procfs.c

@@ -40,7 +40,6 @@
 #include <signal.h>
 #include <ctype.h>
 #include "gdb_bfd.h"
-#include "inflow.h"
 #include "auxv.h"
 #include "procfs.h"
 #include "observable.h"

gdb/ser-unix.c

@@ -32,7 +32,7 @@
 #include "gdbcmd.h"
 #include "gdbsupport/filestuff.h"
 #include <termios.h>
-#include "inflow.h"
+#include "gdbsupport/scoped_ignore_sigttou.h"
 
 struct hardwire_ttystate
   {

gdbsupport/ChangeLog

@@ -1,3 +1,7 @@
+2021-06-17  Pedro Alves  <pedro@palves.net>
+
+	* scoped_ignore_sigttou.h: New file, moved from gdb/ and renamed.
+
 2021-05-17  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* .dir-locals.el: Set sentence-end-double-space for all modes, and

gdbsupport/scoped_ignore_sigttou.h

@@ -1,4 +1,4 @@
-/* Low level interface to ptrace, for GDB when running under Unix.
+/* Support for signoring SIGTTOU.
 
    Copyright (C) 2003-2021 Free Software Foundation, Inc.
 
@@ -17,8 +17,8 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
-#ifndef INFLOW_H
+#ifndef SCOPED_IGNORE_SIGTTOU_H
-#define INFLOW_H
+#define SCOPED_IGNORE_SIGTTOU_H
 
 #include <unistd.h>
 #include <signal.h>
@@ -53,4 +53,4 @@ private:
 #endif
 };
 
-#endif /* inflow.h */
+#endif /* SCOPED_IGNORE_SIGTTOU_H */