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

7 files changed, 10 insertions, 61 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 497d9f6..63d7cf5 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,13 @@
 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
 	...
 	(tui_dispatch_ctrl_char): ... this.  Move CTRL-L handling to
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index b3d264f..881ebde 100644
--- a/gdb/Makefile.in
+++ b/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 \
diff --git a/gdb/inf-ptrace.c b/gdb/inf-ptrace.c
index b6fa71f..afa38de 100644
--- a/gdb/inf-ptrace.c
+++ b/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"
diff --git a/gdb/inflow.c b/gdb/inflow.c
index d241540..f9917d6 100644
--- a/gdb/inflow.c
+++ b/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>
diff --git a/gdb/inflow.h b/gdb/inflow.h
deleted file mode 100644
index 8a671c7..0000000
--- a/gdb/inflow.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/* Low level interface to ptrace, for GDB when running under Unix.
-
-   Copyright (C) 2003-2021 Free Software Foundation, Inc.
-
-   This file is part of GDB.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3 of the License, or
-   (at your option) any later version.
-
-   This program 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 General Public License for more details.
-
-   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
-#define INFLOW_H
-
-#include <unistd.h>
-#include <signal.h>
-#include "gdbsupport/job-control.h"
-
-/* RAII class used to ignore SIGTTOU in a scope.  */
-
-class scoped_ignore_sigttou
-{
-public:
-  scoped_ignore_sigttou ()
-  {
-#ifdef SIGTTOU
-    if (job_control)
-      m_osigttou = signal (SIGTTOU, SIG_IGN);
-#endif
-  }
-
-  ~scoped_ignore_sigttou ()
-  {
-#ifdef SIGTTOU
-    if (job_control)
-      signal (SIGTTOU, m_osigttou);
-#endif
-  }
-
-  DISABLE_COPY_AND_ASSIGN (scoped_ignore_sigttou);
-
-private:
-#ifdef SIGTTOU
-  sighandler_t m_osigttou = NULL;
-#endif
-};
-
-#endif /* inflow.h */
diff --git a/gdb/procfs.c b/gdb/procfs.c
index 23c0aa2..529ee33 100644
--- a/gdb/procfs.c
+++ b/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"
diff --git a/gdb/ser-unix.c b/gdb/ser-unix.c
index e97dc2f..96d024e 100644
--- a/gdb/ser-unix.c
+++ b/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
   {