* pinfo.h (class push_process_state): New class to push a process state

	flag temporarily into myself->process_state.
	* fhandler_console.cc (fhandler_console::read): Add push_process_state
	handler.
	(fhandler_console::write): Call bg_check from here.  Add
	push_process_state handler.
	* fhandler_tty.cc (fhandler_tty_slave::write): Ditto.
	(fhandler_tty_slave::read): Ditto.
	(fhandler_pty_master::write): Ditto.
	(fhandler_pty_master::read): Ditto.
	* syscalls.cc (readv): Remove bg_check call and setting process state.
	(writev): Ditto.

1 files changed, 17 insertions, 0 deletions

diff --git a/winsup/cygwin/pinfo.h b/winsup/cygwin/pinfo.h
index b47b59f..ed8a4ae 100644
--- a/winsup/cygwin/pinfo.h
+++ b/winsup/cygwin/pinfo.h
@@ -224,6 +224,23 @@ cygwin_pid (pid_t pid)
 void __stdcall pinfo_init (char **, int);
 extern pinfo myself;
 
+/* Helper class to allow convenient setting and unsetting a process_state
+   flag in myself.  This is used in certain fhandler read/write methods
+   to set the PID_TTYIN/PID_TTYOU flags in myself->process_state. */
+class push_process_state
+{
+private:
+  int flag;
+public:
+  push_process_state (int add_flag)
+  {
+    flag = add_flag;
+    myself->process_state |= flag;
+  }
+  void pop () { myself->process_state &= ~(flag); }
+  ~push_process_state () { pop (); }
+};
+
 #define _P_VFORK 0
 #define _P_SYSTEM 512
 /* Add this flag in calls to spawn_guts if the calling function is one of