https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=c846bca9921f577956499aa0d8463c04e5694d46
commit c846bca9921f577956499aa0d8463c04e5694d46
Author: Takashi Yano <takashi.y...@nifty.ne.jp>
Date: Wed Apr 22 13:22:59 2015 +0200
Fix OPOST for non-Cygwin pty slaves
* fhandler.h (class fhandler_base): Add virtual function
get_io_handle_cyg() to get handle from which OPOST-processed output is
read on PTY master.
(class fhandler_pty_slave): Add variable output_handle_cyg to store a
handle to which OPOST-processed output is written. Add two functions,
i.e., set_output_handle_cyg() and get_output_handle_cyg(), regarding
variable output_handle_cyg. Now, output_handle is used only by native
windows program. The data before OPOST-processing is written to
output_handle and OPOST-processing is applied in the master-side. For a
cygwin process, OPOST-processing is applied in the slave-side, and the
data after OPOST-processing is written to output_handle_cyg.
(class fhandler_pty_master): Add two variables, i.e., io_handle_cyg and
to_master_cyg, to store handles of a pipe through which OPOST-processed
output passes. Add pty_master_fwd_thread and function
pty_master_fwd_thread() for a thread which applies OPOST-processing
and forwards data from io_handle to to_master_cyg. Add function
get_io_handle_cyg() regarding variable io_handle_cyg. Now, the pipe
between io_handle and to_master are used only by native windows program
for applying OPOST-processing in the master-side. For a cygwin process,
the pipe between io_handle_cyg and to_master_cyg is used for passing
through the data which is applied OPOST-processing in the slave-side.
* fhandler_tty.cc (struct pipe_reply): Add member to_master_cyg.
(fhandler_pty_master::process_slave_output): Read slave output from
io_handle_cyg rather than io_handle.
(fhandler_pty_slave::fhandler_pty_salve): Initialize output_handle_cyg.
(fhandler_pty_slave::open): Set output_handle_cyg by duplicating handle
to_master_cyg on PTY master.
(fhandler_pty_slave::close): Close handle output_handle_cyg.
(fhandler_pty_slave::write): Write data to output_handle_cyg rather
than output_handle.
(fhandler_pty_slave::fch_close_handles): Close handle output_handle_cyg.
(fhandler_pty_master::fhandler_pty_master): Initialize io_handle_cyg,
to_master_cyg and master_fwd_thread.
(fhandler_pty_master::cleanup): Clean up to_master_cyg as well.
(fhandler_pty_master::close): Print to_master_cyg as well in debug
message. Terminate master forwarding thread. Close handles
to_master_cyg and io_handle_cyg.
(fhandler_pty_master::ioctl): Use io_handle_cyg rather than to_master.
(fhandler_pty_master::pty_master_thread): Add code for duplicating
handle to_master_cyg.
(fhandler_pty_master::pty_master_fwd_thread): New function for a thread
to forward OPOST-processed data from io_handle to to_master_cyg. This
thread applies OPOST-processing to the output of native windows program.
(::pty_master_fwd_thread): Ditto.
(fhandler_pty_master::setup): Create a new pipe to pass thruegh OPOST-
processed output. Create new thread to forward data from io_handle to
to_master_cyg. Set handle to_master_cyg to tty. Print io_handle_cyg as
well in debug message. Close handles io_handle_cyg and to_master_cyg in
case of error.
(fhandler_pty_master::fixup_after_fork): Set handle to_master_cyg to
tty. Copy handle to_master_cyg from arch->to_master_cyg.
(fhandler_pty_master::fixup_after_exec): Clean up to_master_cyg.
* select.cc: Check handle returned by get_io_handle_cyg() rather than
get_handle().
* tty.h (class tty): Add variable _to_master_cyg to store a handle to
which OPOST-processed data is written. Add two functions,
to_master_cyg() and set_to_master_cyg(), regarding _to_master_cyg.
Signed-off-by: Corinna Vinschen <cori...@vinschen.de>
Diff:
---
winsup/cygwin/ChangeLog | 60 +++++++++++++++++++++
winsup/cygwin/fhandler.h | 9 ++++
winsup/cygwin/fhandler_tty.cc | 121 ++++++++++++++++++++++++++++++++++++------
winsup/cygwin/select.cc | 4 +-
winsup/cygwin/tty.h | 3 ++
5 files changed, 178 insertions(+), 19 deletions(-)
diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index eb79fcc..7e9de3f 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,63 @@
+2015-04-22 Takashi Yano <takashi.y...@nifty.ne.jp>
+
+ * fhandler.h (class fhandler_base): Add virtual function
+ get_io_handle_cyg() to get handle from which OPOST-processed output is
+ read on PTY master.
+ (class fhandler_pty_slave): Add variable output_handle_cyg to store a
+ handle to which OPOST-processed output is written. Add two functions,
+ i.e., set_output_handle_cyg() and get_output_handle_cyg(), regarding
+ variable output_handle_cyg. Now, output_handle is used only by native
+ windows program. The data before OPOST-processing is written to
+ output_handle and OPOST-processing is applied in the master-side. For a
+ cygwin process, OPOST-processing is applied in the slave-side, and the
+ data after OPOST-processing is written to output_handle_cyg.
+ (class fhandler_pty_master): Add two variables, i.e., io_handle_cyg and
+ to_master_cyg, to store handles of a pipe through which OPOST-processed
+ output passes. Add pty_master_fwd_thread and function
+ pty_master_fwd_thread() for a thread which applies OPOST-processing
+ and forwards data from io_handle to to_master_cyg. Add function
+ get_io_handle_cyg() regarding variable io_handle_cyg. Now, the pipe
+ between io_handle and to_master are used only by native windows program
+ for applying OPOST-processing in the master-side. For a cygwin process,
+ the pipe between io_handle_cyg and to_master_cyg is used for passing
+ through the data which is applied OPOST-processing in the slave-side.
+ * fhandler_tty.cc (struct pipe_reply): Add member to_master_cyg.
+ (fhandler_pty_master::process_slave_output): Read slave output from
+ io_handle_cyg rather than io_handle.
+ (fhandler_pty_slave::fhandler_pty_salve): Initialize output_handle_cyg.
+ (fhandler_pty_slave::open): Set output_handle_cyg by duplicating handle
+ to_master_cyg on PTY master.
+ (fhandler_pty_slave::close): Close handle output_handle_cyg.
+ (fhandler_pty_slave::write): Write data to output_handle_cyg rather
+ than output_handle.
+ (fhandler_pty_slave::fch_close_handles): Close handle output_handle_cyg.
+ (fhandler_pty_master::fhandler_pty_master): Initialize io_handle_cyg,
+ to_master_cyg and master_fwd_thread.
+ (fhandler_pty_master::cleanup): Clean up to_master_cyg as well.
+ (fhandler_pty_master::close): Print to_master_cyg as well in debug
+ message. Terminate master forwarding thread. Close handles
+ to_master_cyg and io_handle_cyg.
+ (fhandler_pty_master::ioctl): Use io_handle_cyg rather than to_master.
+ (fhandler_pty_master::pty_master_thread): Add code for duplicating
+ handle to_master_cyg.
+ (fhandler_pty_master::pty_master_fwd_thread): New function for a thread
+ to forward OPOST-processed data from io_handle to to_master_cyg. This
+ thread applies OPOST-processing to the output of native windows program.
+ (::pty_master_fwd_thread): Ditto.
+ (fhandler_pty_master::setup): Create a new pipe to pass thruegh OPOST-
+ processed output. Create new thread to forward data from io_handle to
+ to_master_cyg. Set handle to_master_cyg to tty. Print io_handle_cyg as
+ well in debug message. Close handles io_handle_cyg and to_master_cyg in
+ case of error.
+ (fhandler_pty_master::fixup_after_fork): Set handle to_master_cyg to
+ tty. Copy handle to_master_cyg from arch->to_master_cyg.
+ (fhandler_pty_master::fixup_after_exec): Clean up to_master_cyg.
+ * select.cc: Check handle returned by get_io_handle_cyg() rather than
+ get_handle().
+ * tty.h (class tty): Add variable _to_master_cyg to store a handle to
+ which OPOST-processed data is written. Add two functions,
+ to_master_cyg() and set_to_master_cyg(), regarding _to_master_cyg.
+
2015-04-22 Corinna Vinschen <cori...@vinschen.de>
* path.cc (basename): Undefine basename before defining function to
diff --git a/winsup/cygwin/fhandler.h b/winsup/cygwin/fhandler.h
index 694c23b..e15f946 100644
--- a/winsup/cygwin/fhandler.h
+++ b/winsup/cygwin/fhandler.h
@@ -412,6 +412,7 @@ public:
that some fd's have two handles. */
virtual HANDLE& get_handle () { return io_handle; }
virtual HANDLE& get_io_handle () { return io_handle; }
+ virtual HANDLE& get_io_handle_cyg () { return io_handle; }
virtual HANDLE& get_output_handle () { return io_handle; }
virtual HANDLE get_stat_handle () { return pc.handle () ?: io_handle; }
virtual HANDLE get_echo_handle () const { return NULL; }
@@ -1516,6 +1517,7 @@ class fhandler_pty_common: public fhandler_termios
class fhandler_pty_slave: public fhandler_pty_common
{
HANDLE inuse; // used to indicate that a tty is in use
+ HANDLE output_handle_cyg;
/* Helper functions for fchmod and fchown. */
bool fch_open_handles (bool chown);
@@ -1526,6 +1528,9 @@ class fhandler_pty_slave: public fhandler_pty_common
/* Constructor */
fhandler_pty_slave (int);
+ void set_output_handle_cyg (HANDLE h) { output_handle_cyg = h; }
+ HANDLE& get_output_handle_cyg () { return output_handle_cyg; }
+
int open (int flags, mode_t mode = 0);
void open_setup (int flags);
ssize_t __stdcall write (const void *ptr, size_t len);
@@ -1575,13 +1580,17 @@ class fhandler_pty_master: public fhandler_pty_common
HANDLE from_master, to_master;
HANDLE echo_r, echo_w;
DWORD dwProcessId; // Owner of master handles
+ HANDLE io_handle_cyg, to_master_cyg;
+ cygthread *master_fwd_thread; // Master forwarding thread
public:
HANDLE get_echo_handle () const { return echo_r; }
+ HANDLE& get_io_handle_cyg () { return io_handle_cyg; }
/* Constructor */
fhandler_pty_master (int);
DWORD pty_master_thread ();
+ DWORD pty_master_fwd_thread ();
int process_slave_output (char *buf, size_t len, int pktmode_on);
void doecho (const void *str, DWORD len);
int accept_input ();
diff --git a/winsup/cygwin/fhandler_tty.cc b/winsup/cygwin/fhandler_tty.cc
index daa24eb..d3fbcee 100644
--- a/winsup/cygwin/fhandler_tty.cc
+++ b/winsup/cygwin/fhandler_tty.cc
@@ -42,6 +42,7 @@ struct pipe_request {
struct pipe_reply {
HANDLE from_master;
HANDLE to_master;
+ HANDLE to_master_cyg;
DWORD error;
};
@@ -236,7 +237,7 @@ fhandler_pty_master::process_slave_output (char *buf,
size_t len, int pktmode_on
/* Check echo pipe first. */
if (::bytes_available (echo_cnt, echo_r) && echo_cnt > 0)
break;
- if (!bytes_available (n))
+ if (!::bytes_available (n, get_io_handle_cyg ()))
goto err;
if (n)
break;
@@ -297,7 +298,7 @@ fhandler_pty_master::process_slave_output (char *buf,
size_t len, int pktmode_on
goto err;
}
}
- else if (!ReadFile (get_handle (), outbuf, rlen, &n, NULL))
+ else if (!ReadFile (get_io_handle_cyg (), outbuf, rlen, &n, NULL))
{
termios_printf ("ReadFile failed, %E");
goto err;
@@ -332,7 +333,7 @@ out:
/* pty slave stuff */
fhandler_pty_slave::fhandler_pty_slave (int unit)
- : fhandler_pty_common (), inuse (NULL)
+ : fhandler_pty_common (), inuse (NULL), output_handle_cyg (NULL)
{
if (unit >= 0)
dev ().parse (DEV_PTYS_MAJOR, unit);
@@ -341,11 +342,11 @@ fhandler_pty_slave::fhandler_pty_slave (int unit)
int
fhandler_pty_slave::open (int flags, mode_t)
{
- HANDLE pty_owner, from_master_local, to_master_local;
+ HANDLE pty_owner, from_master_local, to_master_local, to_master_cyg_local;
HANDLE *handles[] =
{
&from_master_local, &input_available_event, &input_mutex, &inuse,
- &output_mutex, &to_master_local, &pty_owner,
+ &output_mutex, &to_master_local, &pty_owner, &to_master_cyg_local,
NULL
};
@@ -397,7 +398,8 @@ fhandler_pty_slave::open (int flags, mode_t)
release_output_mutex ();
}
- if (!get_ttyp ()->from_master () || !get_ttyp ()->to_master ())
+ if (!get_ttyp ()->from_master () ||
+ !get_ttyp ()->to_master () || !get_ttyp ()->to_master_cyg ())
{
errmsg = "pty handles have been closed";
set_errno (EACCES);
@@ -448,6 +450,13 @@ fhandler_pty_slave::open (int flags, mode_t)
errmsg = "can't duplicate output, %E";
goto err;
}
+ if (!DuplicateHandle (pty_owner, get_ttyp ()->to_master_cyg (),
+ GetCurrentProcess (), &to_master_cyg_local, 0, TRUE,
+ DUPLICATE_SAME_ACCESS))
+ {
+ errmsg = "can't duplicate output for cygwin, %E";
+ goto err;
+ }
if (pty_owner != GetCurrentProcess ())
CloseHandle (pty_owner);
}
@@ -468,7 +477,8 @@ fhandler_pty_slave::open (int flags, mode_t)
}
from_master_local = repl.from_master;
to_master_local = repl.to_master;
- if (!from_master_local || !to_master_local)
+ to_master_cyg_local = repl.to_master_cyg;
+ if (!from_master_local || !to_master_local || !to_master_cyg_local)
{
SetLastError (repl.error);
errmsg = "error duplicating pipes, %E";
@@ -477,14 +487,18 @@ fhandler_pty_slave::open (int flags, mode_t)
}
VerifyHandle (from_master_local);
VerifyHandle (to_master_local);
+ VerifyHandle (to_master_cyg_local);
termios_printf ("duplicated from_master %p->%p from pty_owner",
get_ttyp ()->from_master (), from_master_local);
termios_printf ("duplicated to_master %p->%p from pty_owner",
get_ttyp ()->to_master (), to_master_local);
+ termios_printf ("duplicated to_master_cyg %p->%p from pty_owner",
+ get_ttyp ()->to_master_cyg (), to_master_cyg_local);
set_io_handle (from_master_local);
set_output_handle (to_master_local);
+ set_output_handle_cyg (to_master_cyg_local);
fhandler_console::need_invisible ();
set_open_status ();
@@ -533,6 +547,9 @@ fhandler_pty_slave::close ()
termios_printf ("CloseHandle (inuse), %E");
if (!ForceCloseHandle (input_available_event))
termios_printf ("CloseHandle (input_available_event<%p>), %E",
input_available_event);
+ if (!ForceCloseHandle (get_output_handle_cyg ()))
+ termios_printf ("CloseHandle (get_output_handle_cyg ()<%p>), %E",
+ get_output_handle_cyg ());
if ((unsigned) myself->ctty == FHDEV (DEV_PTYS_MAJOR, get_minor ()))
fhandler_console::free_console (); /* assumes that we are the last pty
closer */
return fhandler_pty_common::close ();
@@ -591,7 +608,7 @@ fhandler_pty_slave::write (const void *ptr, size_t len)
push_process_state process_state (PID_TTYOU);
- if (!process_opost_output (get_output_handle (), ptr, towrite, false))
+ if (!process_opost_output (get_output_handle_cyg (), ptr, towrite, false))
{
DWORD err = GetLastError ();
termios_printf ("WriteFile failed, %E");
@@ -1069,6 +1086,7 @@ fhandler_pty_slave::fch_close_handles ()
{
close_maybe (get_io_handle ());
close_maybe (get_output_handle ());
+ close_maybe (get_output_handle_cyg ());
close_maybe (input_available_event);
close_maybe (output_mutex);
close_maybe (input_mutex);
@@ -1142,7 +1160,8 @@ errout:
fhandler_pty_master::fhandler_pty_master (int unit)
: fhandler_pty_common (), pktmode (0), master_ctl (NULL),
master_thread (NULL), from_master (NULL), to_master (NULL),
- echo_r (NULL), echo_w (NULL), dwProcessId (0)
+ echo_r (NULL), echo_w (NULL), dwProcessId (0),
+ io_handle_cyg (NULL), to_master_cyg (NULL), master_fwd_thread (NULL)
{
if (unit >= 0)
dev ().parse (DEV_PTYM_MAJOR, unit);
@@ -1200,15 +1219,15 @@ fhandler_pty_master::cleanup ()
{
report_tty_counts (this, "closing master", "");
if (archetype)
- from_master = to_master = NULL;
+ from_master = to_master = to_master_cyg = NULL;
fhandler_base::cleanup ();
}
int
fhandler_pty_master::close ()
{
- termios_printf ("closing from_master(%p)/to_master(%p) since we own
them(%u)",
- from_master, to_master, dwProcessId);
+ termios_printf ("closing from_master(%p)/to_master(%p)/to_master_cyg(%p)
since we own them(%u)",
+ from_master, to_master, to_master_cyg, dwProcessId);
if (cygwin_finished_initializing)
{
if (master_ctl && get_ttyp ()->master_pid == myself->pid)
@@ -1231,6 +1250,7 @@ fhandler_pty_master::close ()
master_ctl = NULL;
}
release_output_mutex ();
+ master_fwd_thread->terminate_thread ();
}
}
@@ -1247,6 +1267,11 @@ fhandler_pty_master::close ()
if (!ForceCloseHandle (to_master))
termios_printf ("error closing to_master %p, %E", to_master);
from_master = to_master = NULL;
+ if (!ForceCloseHandle (get_io_handle_cyg ()))
+ termios_printf ("error closing io_handle_cyg %p, %E", get_io_handle_cyg
());
+ if (!ForceCloseHandle (to_master_cyg))
+ termios_printf ("error closing to_master_cyg %p, %E", to_master_cyg);
+ get_io_handle_cyg () = to_master_cyg = NULL;
ForceCloseHandle (echo_r);
ForceCloseHandle (echo_w);
echo_r = echo_w = NULL;
@@ -1353,7 +1378,7 @@ fhandler_pty_master::ioctl (unsigned int cmd, void *arg)
case FIONREAD:
{
DWORD n;
- if (!::bytes_available (n, to_master))
+ if (!::bytes_available (n, get_io_handle_cyg ()))
{
set_errno (EINVAL);
return -1;
@@ -1523,6 +1548,13 @@ fhandler_pty_master::pty_master_thread ()
termios_printf ("DuplicateHandle (to_master), %E");
goto reply;
}
+ if (!DuplicateHandle (GetCurrentProcess (), to_master_cyg,
+ client, &repl.to_master_cyg,
+ 0, TRUE, DUPLICATE_SAME_ACCESS))
+ {
+ termios_printf ("DuplicateHandle (to_master_cyg), %E");
+ goto reply;
+ }
}
reply:
repl.error = GetLastError ();
@@ -1548,6 +1580,40 @@ pty_master_thread (VOID *arg)
return ((fhandler_pty_master *) arg)->pty_master_thread ();
}
+DWORD
+fhandler_pty_master::pty_master_fwd_thread ()
+{
+ DWORD rlen;
+ char outbuf[OUT_BUFFER_SIZE];
+
+ termios_printf("Started.");
+ for (;;)
+ {
+ if (!ReadFile (get_io_handle (), outbuf, sizeof outbuf, &rlen, NULL))
+ {
+ termios_printf ("ReadFile for forwarding failed, %E");
+ break;
+ }
+ ssize_t wlen = rlen;
+ while (rlen>0)
+ {
+ if (!process_opost_output (to_master_cyg, outbuf, wlen, false))
+ {
+ termios_printf ("WriteFile for forwarding failed, %E");
+ break;
+ }
+ rlen -= wlen;
+ }
+ }
+ return 0;
+}
+
+static DWORD WINAPI
+pty_master_fwd_thread (VOID *arg)
+{
+ return ((fhandler_pty_master *) arg)->pty_master_fwd_thread ();
+}
+
bool
fhandler_pty_master::setup ()
{
@@ -1574,7 +1640,7 @@ fhandler_pty_master::setup ()
termios_printf ("can't set output_handle(%p) to non-blocking mode",
get_output_handle ());
- char pipename[sizeof("ptyNNNN-from-master")];
+ char pipename[sizeof("ptyNNNN-to-master-cyg")];
__small_sprintf (pipename, "pty%d-to-master", unit);
res = fhandler_pipe::create (&sec_none, &get_io_handle (), &to_master,
fhandler_pty_common::pipesize, pipename, 0);
@@ -1584,6 +1650,15 @@ fhandler_pty_master::setup ()
goto err;
}
+ __small_sprintf (pipename, "pty%d-to-master-cyg", unit);
+ res = fhandler_pipe::create (&sec_none, &get_io_handle_cyg (),
&to_master_cyg,
+ fhandler_pty_common::pipesize, pipename, 0);
+ if (res)
+ {
+ errstr = "output pipe for cygwin";
+ goto err;
+ }
+
ProtectHandle1 (get_io_handle (), from_pty);
__small_sprintf (pipename, "pty%d-echoloop", unit);
@@ -1643,28 +1718,38 @@ fhandler_pty_master::setup ()
errstr = "pty master control thread";
goto err;
}
+ master_fwd_thread = new cygthread (::pty_master_fwd_thread, this, "ptymf");
+ if (!master_fwd_thread)
+ {
+ errstr = "pty master forwarding thread";
+ goto err;
+ }
t.set_from_master (from_master);
t.set_to_master (to_master);
+ t.set_to_master_cyg (to_master_cyg);
t.winsize.ws_col = 80;
t.winsize.ws_row = 25;
t.master_pid = myself->pid;
dev ().parse (DEV_PTYM_MAJOR, unit);
- termios_printf ("this %p, pty%d opened - from_pty %p, to_pty %p", this, unit,
- get_io_handle (), get_output_handle ());
+ termios_printf ("this %p, pty%d opened - from_pty <%p,%p>, to_pty %p",
+ this, unit, get_io_handle (), get_io_handle_cyg (),
+ get_output_handle ());
return true;
err:
__seterrno ();
close_maybe (get_io_handle ());
+ close_maybe (get_io_handle_cyg ());
close_maybe (get_output_handle ());
close_maybe (input_available_event);
close_maybe (output_mutex);
close_maybe (input_mutex);
close_maybe (from_master);
close_maybe (to_master);
+ close_maybe (to_master_cyg);
close_maybe (echo_r);
close_maybe (echo_w);
close_maybe (master_ctl);
@@ -1684,11 +1769,13 @@ fhandler_pty_master::fixup_after_fork (HANDLE parent)
{
t.set_from_master (arch->from_master);
t.set_to_master (arch->to_master);
+ t.set_to_master_cyg (arch->to_master_cyg);
}
arch->dwProcessId = wpid;
}
from_master = arch->from_master;
to_master = arch->to_master;
+ to_master_cyg = arch->to_master_cyg;
report_tty_counts (this, "inherited master", "");
}
@@ -1698,7 +1785,7 @@ fhandler_pty_master::fixup_after_exec ()
if (!close_on_exec ())
fixup_after_fork (spawn_info->parent);
else
- from_master = to_master = NULL;
+ from_master = to_master = to_master_cyg = NULL;
}
BOOL
diff --git a/winsup/cygwin/select.cc b/winsup/cygwin/select.cc
index 1706c87..803e5d5 100644
--- a/winsup/cygwin/select.cc
+++ b/winsup/cygwin/select.cc
@@ -80,7 +80,7 @@ details. */
#define copyfd_set(to, from, n) memcpy (to, from, sizeof_fd_set (n));
#define set_handle_or_return_if_not_open(h, s) \
- h = (s)->fh->get_handle (); \
+ h = (s)->fh->get_io_handle_cyg (); \
if (cygheap->fdtab.not_open ((s)->fd)) \
{ \
(s)->thread_errno = EBADF; \
@@ -1264,7 +1264,7 @@ fhandler_base::select_read (select_stuff *ss)
s->startup = no_startup;
s->verify = verify_ok;
}
- s->h = get_handle ();
+ s->h = get_io_handle_cyg ();
s->read_selected = true;
s->read_ready = true;
return s;
diff --git a/winsup/cygwin/tty.h b/winsup/cygwin/tty.h
index 27d43f7..522cf9e 100644
--- a/winsup/cygwin/tty.h
+++ b/winsup/cygwin/tty.h
@@ -92,12 +92,15 @@ public:
private:
HANDLE _from_master;
HANDLE _to_master;
+ HANDLE _to_master_cyg;
public:
HANDLE from_master() const { return _from_master; }
HANDLE to_master() const { return _to_master; }
+ HANDLE to_master_cyg() const { return _to_master_cyg; }
void set_from_master (HANDLE h) { _from_master = h; }
void set_to_master (HANDLE h) { _to_master = h; }
+ void set_to_master_cyg (HANDLE h) { _to_master_cyg = h; }
int read_retval;
bool was_opened; /* True if opened at least once. */
