* fhandler.h (class fhandler_serial): Add new members of

	the class - rts,dtr and method ioctl(). Variables rts and dtr
	important for Win 9x only.
	* fhandler_serial.cc (fhandler_serial::open): Add initial setting
	of dtr and rts. Important for Win 9x only.
	(fhandler_serial::ioctl): New function. Implements commands TIOCMGET,
	TIOCMSET and TIOCINQ.
	(fhandler_serial::tcflush): Fixed found error.
	(fhandler_serial::tcsetattr): Add settings of rts and dtr. Important
	for Win 9x only.
	* termios.h: Add new defines as a support for ioctl() function
	on serial device.

4 files changed, 168 insertions, 2 deletions

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 01a2b09e0..66f13c834 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,18 @@
+2002-07-22  Jacek Trzcinski <jacek@certum.pl>
+
+	* fhandler.h (class fhandler_serial): Add new members of
+	the class - rts,dtr and method ioctl(). Variables rts and dtr
+	important for Win 9x only.
+	* fhandler_serial.cc (fhandler_serial::open): Add initial setting
+	of dtr and rts. Important for Win 9x only.
+	(fhandler_serial::ioctl): New function. Implements commands TIOCMGET,
+	TIOCMSET and TIOCINQ.
+	(fhandler_serial::tcflush): Fixed found error.
+	(fhandler_serial::tcsetattr): Add settings of rts and dtr. Important
+	for Win 9x only.
+	* termios.h: Add new defines as a support for ioctl() function  
+	on serial device.
+
 2002-07-20  Christopher Faylor  <cgf@redhat.com>
 
 	* autoload.cc (LoadDLLprime): Add jmp call to allow streamlining of
diff --git a/winsup/cygwin/fhandler.h b/winsup/cygwin/fhandler.h
index 164a892d1..17390bdc3 100644
--- a/winsup/cygwin/fhandler.h
+++ b/winsup/cygwin/fhandler.h
@@ -629,6 +629,8 @@ class fhandler_serial: public fhandler_base
   unsigned int vmin_;			/* from termios */
   unsigned int vtime_;			/* from termios */
   pid_t pgrp_;
+  int rts;				/* for Windows 9x purposes only */
+  int dtr;				/* for Windows 9x purposes only */
 
  public:
   int overlapped_armed;
@@ -648,6 +650,7 @@ class fhandler_serial: public fhandler_base
   int tcsendbreak (int);
   int tcdrain ();
   int tcflow (int);
+  int ioctl (unsigned int cmd, void *);
   int tcsetattr (int a, const struct termios *t);
   int tcgetattr (struct termios *t);
   __off64_t lseek (__off64_t, int) { return 0; }
diff --git a/winsup/cygwin/fhandler_serial.cc b/winsup/cygwin/fhandler_serial.cc
index b5816a858..648805150 100644
--- a/winsup/cygwin/fhandler_serial.cc
+++ b/winsup/cygwin/fhandler_serial.cc
@@ -268,6 +268,23 @@ fhandler_serial::open (path_conv *, int flags, mode_t mode)
 	system_printf ("couldn't set initial state for %s, %E", get_name ());
     }
 
+  /* setting rts and dtr to known state so that ioctl() function with
+  request TIOCMGET could return correct value of RTS and DTR lines. 
+  Important only for Win 9x systems */
+  
+  if (wincap.is_winnt() == false)
+  {
+    if (EscapeCommFunction (get_handle (), SETDTR) == 0)
+      system_printf ("couldn't set initial state of DTR for %s, %E", get_name ());
+    if (EscapeCommFunction (get_handle (), SETRTS) == 0)
+      system_printf ("couldn't set initial state of RTS for %s, %E", get_name ());
+      
+    /* even though one of above functions fail I have to set rts and dtr
+    variables to initial value. */
+    rts = TIOCM_RTS;
+    dtr = TIOCM_DTR;
+  }
+  
   SetCommMask (get_handle (), EV_RXCHAR);
   set_open_status ();
   syscall_printf ("%p = fhandler_serial::open (%s, %p, %p)",
@@ -324,7 +341,7 @@ fhandler_serial::tcflow (int action)
   DWORD win32action = 0;
   DCB dcb;
   char xchar;
-
+      
   termios_printf ("action %d", action);
 
   switch (action)
@@ -358,6 +375,107 @@ fhandler_serial::tcflow (int action)
   return 0;
 }
 
+
+/* ioctl: */
+int
+fhandler_serial::ioctl (unsigned int cmd, void *buffer)
+{
+
+  DWORD ev;
+  COMSTAT st;
+  DWORD action;
+  DWORD modemLines;
+  DWORD mcr;
+  DWORD cbReturned;
+  bool result;
+  int modemStatus;
+  int request;
+  
+  request = *(int *) buffer;
+  action = 0;
+  modemStatus = 0;
+  if (!ClearCommError (get_handle (), &ev, &st))
+    return -1;
+  switch (cmd)
+    {
+    case TIOCMGET:
+      if (GetCommModemStatus (get_handle (), &modemLines) == 0)
+        return -1;
+      if (modemLines & MS_CTS_ON)
+        modemStatus |= TIOCM_CTS;
+      if (modemLines & MS_DSR_ON)
+        modemStatus |= TIOCM_DSR;
+      if (modemLines & MS_RING_ON)
+        modemStatus |= TIOCM_RI;
+      if (modemLines & MS_RLSD_ON)
+        modemStatus |= TIOCM_CD;
+      if (wincap.is_winnt() == true)
+        {
+	
+	  /* here is Windows NT or Windows 2000 part */
+	  result = DeviceIoControl (get_handle (),
+                                    0x001B0078,
+				    NULL, 0, &mcr, 4, &cbReturned, 0);
+          if (!result)
+	    return -1;
+          if (cbReturned != 4)
+	    return -1;
+          if (mcr & 2)
+	    modemStatus |= TIOCM_RTS;
+          if (mcr & 1)
+	    modemStatus |= TIOCM_DTR;
+	    
+	}
+      else
+        {
+	
+	  /* here is Windows 9x part */
+	  modemStatus |= rts | dtr;
+	  
+	}
+      *(int *) buffer = modemStatus;
+      return 0;
+    case TIOCMSET:
+      if (request & TIOCM_RTS)
+        {
+	  if (EscapeCommFunction (get_handle (), SETRTS) == 0)
+	    return -1;
+          else
+	    rts = TIOCM_RTS;
+	}
+      else
+        {
+	  if (EscapeCommFunction (get_handle (), CLRRTS) == 0)
+	    return -1;
+          else
+	    rts = 0;
+	}
+      if (request & TIOCM_DTR)
+        {
+	  if (EscapeCommFunction (get_handle (), SETDTR) == 0)
+	    return -1;
+          else
+	    dtr = TIOCM_DTR;
+	}
+      else
+        {
+	  if (EscapeCommFunction (get_handle (), CLRDTR) == 0)
+	    return -1;
+          else
+	    dtr = 0;
+	}
+      return 0;
+   case TIOCINQ:
+     if (ev & CE_FRAME | ev & CE_IOE | ev & CE_OVERRUN |
+         ev & CE_RXOVER | ev & CE_RXPARITY)
+       return -1;
+     *(int *) buffer = st.cbInQue;
+     return 0;
+   default:
+     return -1;
+   }
+}    
+
 /* tcflush: POSIX 7.2.2.1 */
 int
 fhandler_serial::tcflush (int queue)
@@ -395,6 +513,8 @@ fhandler_serial::tcsetattr (int action, const struct termios *t)
   COMMTIMEOUTS to;
   DCB ostate, state;
   unsigned int ovtime = vtime_, ovmin = vmin_;
+  int tmpDtr, tmpRts;
+  tmpDtr = tmpRts = 0;
 
   termios_printf ("action %d", action);
   if ((action == TCSADRAIN) || (action == TCSAFLUSH))
@@ -560,6 +680,7 @@ fhandler_serial::tcsetattr (int action, const struct termios *t)
     {							/* disable */
       state.fRtsControl = RTS_CONTROL_ENABLE;
       state.fOutxCtsFlow = FALSE;
+      tmpRts = TIOCM_RTS;
     }
 
   if (t->c_cflag & CRTSXOFF)
@@ -592,7 +713,10 @@ fhandler_serial::tcsetattr (int action, const struct termios *t)
   set_w_binary ((t->c_oflag & ONLCR) ? 0 : 1);
 
   if (dropDTR == TRUE)
-    EscapeCommFunction (get_handle (), CLRDTR);
+    {
+      EscapeCommFunction (get_handle (), CLRDTR);
+      tmpDtr = 0;
+    }
   else
     {
       /* FIXME: Sometimes when CLRDTR is set, setting
@@ -601,7 +725,11 @@ fhandler_serial::tcsetattr (int action, const struct termios *t)
       parameters while DTR is still down. */
 
       EscapeCommFunction (get_handle (), SETDTR);
+      tmpDtr = TIOCM_DTR;
     }
+    
+  rts = tmpRts;
+  dtr = tmpDtr;
 
   /*
   The following documentation on was taken from "Linux Serial Programming
diff --git a/winsup/cygwin/include/sys/termios.h b/winsup/cygwin/include/sys/termios.h
index c37776111..20a84aa78 100644
--- a/winsup/cygwin/include/sys/termios.h
+++ b/winsup/cygwin/include/sys/termios.h
@@ -13,6 +13,26 @@ details. */
 #ifndef	_SYS_TERMIOS_H
 #define _SYS_TERMIOS_H
 
+#define	TIOCMGET	0x5415
+#define	TIOCMSET	0x5418
+#define	TIOCINQ		0x541B	
+
+/* TIOCINQ is utilized instead of FIONREAD which has been
+accupied for other purposes under CYGWIN.
+Other UNIX ioctl requests has been omited because
+effects of their work one can achive by standard
+POSIX commands */
+
+
+#define	TIOCM_DTR	0x002
+#define	TIOCM_RTS	0x004
+#define	TIOCM_CTS	0x020
+#define	TIOCM_CAR	0x040
+#define	TIOCM_RNG	0x080
+#define	TIOCM_DSR	0x100
+#define	TIOCM_CD	TIOCM_CAR
+#define	TIOCM_RI	TIOCM_RNG
+
 #define TCOOFF		0
 #define TCOON		1
 #define TCIOFF		2