libs/newlib-cygwin
libs
/
newlib-cygwin
mirror of git://sourceware.org/git/newlib-cygwin.git
4
0
Fork 0
Code Issues Projects Releases Wiki Activity
newlib-cygwin/winsup/cygwin/fhandler_tty.cc

3563 lines
95 KiB
C++
Raw Blame History

/* fhandler_tty.cc
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include "winsup.h"
#include <stdlib.h>
#include <sys/param.h>
#include <cygwin/acl.h>
#include <cygwin/kd.h>
#include "cygerrno.h"
#include "security.h"
#include "path.h"
#include "fhandler.h"
#include "dtable.h"
#include "sigproc.h"
#include "pinfo.h"
#include "ntdll.h"
#include "cygheap.h"
#include "shared_info.h"
#include "cygthread.h"
#include "child_info.h"
#include <asm/socket.h>
#include "cygwait.h"
#include "tls_pbuf.h"
#define ALWAYS_USE_PCON false
#define USE_API_HOOK true
#define USE_OWN_NLS_FUNC true
#if !USE_OWN_NLS_FUNC
#include "langinfo.h"
#endif
/* Not yet defined in Mingw-w64 */
#ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
#define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x0004
#endif /* ENABLE_VIRTUAL_TERMINAL_PROCESSING */
#ifndef DISABLE_NEWLINE_AUTO_RETURN
#define DISABLE_NEWLINE_AUTO_RETURN 0x0008
#endif /* DISABLE_NEWLINE_AUTO_RETURN */
#ifndef PROC_THREAD_ATTRIBUTE_PSEUDOCONSOLE
#define PROC_THREAD_ATTRIBUTE_PSEUDOCONSOLE 0x00020016
#endif /* PROC_THREAD_ATTRIBUTE_PSEUDOCONSOLE */
#ifndef ENABLE_VIRTUAL_TERMINAL_INPUT
#define ENABLE_VIRTUAL_TERMINAL_INPUT 0x0200
#endif /* ENABLE_VIRTUAL_TERMINAL_INPUT */
extern "C" int sscanf (const char *, const char *, ...);
extern "C" int ttyname_r(int, char*, size_t);
#define close_maybe(h) \
do { \
if (h && h != INVALID_HANDLE_VALUE) \
CloseHandle (h); \
} while (0)
/* pty master control pipe messages */
struct pipe_request {
DWORD pid;
};
struct pipe_reply {
HANDLE from_master;
HANDLE from_master_cyg;
HANDLE to_master;
HANDLE to_master_cyg;
DWORD error;
};
static bool pcon_attached[NTTYS];
static bool isHybrid;
#if USE_API_HOOK
static void
set_switch_to_pcon (void)
{
cygheap_fdenum cfd (false);
while (cfd.next () >= 0)
if (cfd->get_major () == DEV_PTYS_MAJOR)
{
fhandler_base *fh = cfd;
fhandler_pty_slave *ptys = (fhandler_pty_slave *) fh;
ptys->set_switch_to_pcon ();
return;
}
}
#define DEF_HOOK(name) static __typeof__ (name) *name##_Orig
DEF_HOOK (WriteFile);
DEF_HOOK (WriteConsoleA);
DEF_HOOK (WriteConsoleW);
DEF_HOOK (ReadFile);
DEF_HOOK (ReadConsoleA);
DEF_HOOK (ReadConsoleW);
DEF_HOOK (WriteConsoleOutputA);
DEF_HOOK (WriteConsoleOutputW);
DEF_HOOK (WriteConsoleOutputCharacterA);
DEF_HOOK (WriteConsoleOutputCharacterW);
DEF_HOOK (WriteConsoleOutputAttribute);
DEF_HOOK (WriteConsoleInputA);
DEF_HOOK (WriteConsoleInputW);
DEF_HOOK (ReadConsoleInputA);
DEF_HOOK (ReadConsoleInputW);
DEF_HOOK (PeekConsoleInputA);
DEF_HOOK (PeekConsoleInputW);
#define CHK_CONSOLE_ACCESS(h) \
{ \
DWORD dummy; \
if (!isHybrid \
&& GetFileType (h) == FILE_TYPE_CHAR \
&& GetConsoleMode (h, &dummy)) \
{ \
isHybrid = true; \
set_switch_to_pcon (); \
} \
}
static BOOL WINAPI
WriteFile_Hooked
(HANDLE h, LPCVOID p, DWORD l, LPDWORD n, LPOVERLAPPED o)
{
CHK_CONSOLE_ACCESS (h);
return WriteFile_Orig (h, p, l, n, o);
}
static BOOL WINAPI
WriteConsoleA_Hooked
(HANDLE h, LPCVOID p, DWORD l, LPDWORD n, LPVOID o)
{
CHK_CONSOLE_ACCESS (h);
return WriteConsoleA_Orig (h, p, l, n, o);
}
static BOOL WINAPI
WriteConsoleW_Hooked
(HANDLE h, LPCVOID p, DWORD l, LPDWORD n, LPVOID o)
{
CHK_CONSOLE_ACCESS (h);
return WriteConsoleW_Orig (h, p, l, n, o);
}
static BOOL WINAPI
ReadFile_Hooked
(HANDLE h, LPVOID p, DWORD l, LPDWORD n, LPOVERLAPPED o)
{
CHK_CONSOLE_ACCESS (h);
return ReadFile_Orig (h, p, l, n, o);
}
static BOOL WINAPI
ReadConsoleA_Hooked
(HANDLE h, LPVOID p, DWORD l, LPDWORD n, LPVOID o)
{
CHK_CONSOLE_ACCESS (h);
return ReadConsoleA_Orig (h, p, l, n, o);
}
static BOOL WINAPI
ReadConsoleW_Hooked
(HANDLE h, LPVOID p, DWORD l, LPDWORD n, LPVOID o)
{
CHK_CONSOLE_ACCESS (h);
return ReadConsoleW_Orig (h, p, l, n, o);
}
static BOOL WINAPI
WriteConsoleOutputA_Hooked
(HANDLE h, CONST CHAR_INFO *p, COORD s, COORD c, PSMALL_RECT r)
{
CHK_CONSOLE_ACCESS (h);
return WriteConsoleOutputA_Orig (h, p, s, c, r);
}
static BOOL WINAPI
WriteConsoleOutputW_Hooked
(HANDLE h, CONST CHAR_INFO *p, COORD s, COORD c, PSMALL_RECT r)
{
CHK_CONSOLE_ACCESS (h);
return WriteConsoleOutputW_Orig (h, p, s, c, r);
}
static BOOL WINAPI
WriteConsoleOutputCharacterA_Hooked
(HANDLE h, LPCSTR p, DWORD l, COORD c, LPDWORD n)
{
CHK_CONSOLE_ACCESS (h);
return WriteConsoleOutputCharacterA_Orig (h, p, l, c, n);
}
static BOOL WINAPI
WriteConsoleOutputCharacterW_Hooked
(HANDLE h, LPCWSTR p, DWORD l, COORD c, LPDWORD n)
{
CHK_CONSOLE_ACCESS (h);
return WriteConsoleOutputCharacterW_Orig (h, p, l, c, n);
}
static BOOL WINAPI
WriteConsoleOutputAttribute_Hooked
(HANDLE h, CONST WORD *a, DWORD l, COORD c, LPDWORD n)
{
CHK_CONSOLE_ACCESS (h);
return WriteConsoleOutputAttribute_Orig (h, a, l, c, n);
}
static BOOL WINAPI
WriteConsoleInputA_Hooked
(HANDLE h, CONST INPUT_RECORD *r, DWORD l, LPDWORD n)
{
CHK_CONSOLE_ACCESS (h);
return WriteConsoleInputA_Orig (h, r, l, n);
}
static BOOL WINAPI
WriteConsoleInputW_Hooked
(HANDLE h, CONST INPUT_RECORD *r, DWORD l, LPDWORD n)
{
CHK_CONSOLE_ACCESS (h);
return WriteConsoleInputW_Orig (h, r, l, n);
}
static BOOL WINAPI
ReadConsoleInputA_Hooked
(HANDLE h, PINPUT_RECORD r, DWORD l, LPDWORD n)
{
CHK_CONSOLE_ACCESS (h);
return ReadConsoleInputA_Orig (h, r, l, n);
}
static BOOL WINAPI
ReadConsoleInputW_Hooked
(HANDLE h, PINPUT_RECORD r, DWORD l, LPDWORD n)
{
CHK_CONSOLE_ACCESS (h);
return ReadConsoleInputW_Orig (h, r, l, n);
}
static BOOL WINAPI
PeekConsoleInputA_Hooked
(HANDLE h, PINPUT_RECORD r, DWORD l, LPDWORD n)
{
CHK_CONSOLE_ACCESS (h);
return PeekConsoleInputA_Orig (h, r, l, n);
}
static BOOL WINAPI
PeekConsoleInputW_Hooked
(HANDLE h, PINPUT_RECORD r, DWORD l, LPDWORD n)
{
CHK_CONSOLE_ACCESS (h);
return PeekConsoleInputW_Orig (h, r, l, n);
}
#else /* USE_API_HOOK */
#define WriteFile_Orig 0
#define ReadFile_Orig 0
#define PeekConsoleInputA_Orig 0
#endif /* USE_API_HOOK */
bool
bytes_available (DWORD& n, HANDLE h)
{
DWORD navail, nleft;
navail = nleft = 0;
bool succeeded = PeekNamedPipe (h, NULL, 0, NULL, &navail, &nleft);
if (succeeded)
/* nleft should always be the right choice unless something has written 0
bytes to the pipe. In that pathological case we return the actual number
of bytes available in the pipe. See cgf-000008 for more details. */
n = nleft ?: navail;
else
{
termios_printf ("PeekNamedPipe(%p) failed, %E", h);
n = 0;
}
debug_only_printf ("n %u, nleft %u, navail %u", n, nleft, navail);
return succeeded;
}
bool
fhandler_pty_common::bytes_available (DWORD &n)
{
return ::bytes_available (n, get_handle_cyg ());
}
#ifdef DEBUGGING
static class mutex_stack
{
public:
const char *fn;
int ln;
const char *tname;
} ostack[100];
static int osi;
#endif /*DEBUGGING*/
void
fhandler_pty_master::flush_to_slave ()
{
if (get_readahead_valid () && !(get_ttyp ()->ti.c_lflag & ICANON))
accept_input ();
}
DWORD
fhandler_pty_common::__acquire_output_mutex (const char *fn, int ln,
DWORD ms)
{
if (strace.active ())
strace.prntf (_STRACE_TERMIOS, fn, "(%d): pty output_mutex (%p): waiting %d ms", ln, output_mutex, ms);
if (ms == INFINITE)
ms = 100;
DWORD res = WaitForSingleObject (output_mutex, ms);
if (res == WAIT_OBJECT_0)
{
#ifndef DEBUGGING
if (strace.active ())
strace.prntf (_STRACE_TERMIOS, fn, "(%d): pty output_mutex: acquired", ln, res);
#else
ostack[osi].fn = fn;
ostack[osi].ln = ln;
ostack[osi].tname = mythreadname ();
termios_printf ("acquired for %s:%d, osi %d", fn, ln, osi);
osi++;
#endif
}
return res;
}
void
fhandler_pty_common::__release_output_mutex (const char *fn, int ln)
{
if (ReleaseMutex (output_mutex))
{
#ifndef DEBUGGING
if (strace.active ())
strace.prntf (_STRACE_TERMIOS, fn, "(%d): pty output_mutex(%p) released", ln, output_mutex);
#else
if (osi > 0)
osi--;
termios_printf ("released(%p) at %s:%d, osi %d", output_mutex, fn, ln, osi);
termios_printf (" for %s:%d (%s)", ostack[osi].fn, ostack[osi].ln, ostack[osi].tname);
ostack[osi].ln = -ln;
#endif
}
#ifdef DEBUGGING
else if (osi > 0)
{
system_printf ("couldn't release output mutex but we seem to own it, %E");
try_to_debug ();
}
#endif
}
static bool switch_to_pcon_prev;
bool
fhandler_pty_common::check_switch_to_pcon (void)
{
bool switch_to_pcon_now = get_ttyp ()->switch_to_pcon;
if (!isHybrid && !switch_to_pcon_prev && switch_to_pcon_now)
{
Sleep (40);
/* Check again */
switch_to_pcon_now = get_ttyp ()->switch_to_pcon;
if (switch_to_pcon_now)
switch_to_pcon_prev = true;
}
else
switch_to_pcon_prev = switch_to_pcon_now;
return switch_to_pcon_prev;
}
/* Process pty input. */
void
fhandler_pty_master::doecho (const void *str, DWORD len)
{
ssize_t towrite = len;
acquire_output_mutex (INFINITE);
if (!process_opost_output (echo_w, str, towrite, true))
termios_printf ("Write to echo pipe failed, %E");
release_output_mutex ();
}
int
fhandler_pty_master::accept_input ()
{
DWORD bytes_left;
int ret = 1;
WaitForSingleObject (input_mutex, INFINITE);
bytes_left = eat_readahead (-1);
if (!bytes_left)
{
termios_printf ("sending EOF to slave");
get_ttyp ()->read_retval = 0;
}
else
{
char *p = rabuf;
DWORD rc;
DWORD written = 0;
paranoid_printf ("about to write %u chars to slave", bytes_left);
rc = WriteFile (get_output_handle (), p, bytes_left, &written, NULL);
if (!rc)
{
debug_printf ("error writing to pipe %p %E", get_output_handle ());
get_ttyp ()->read_retval = -1;
ret = -1;
}
else
{
get_ttyp ()->read_retval = 1;
p += written;
bytes_left -= written;
if (bytes_left > 0)
{
debug_printf ("to_slave pipe is full");
puts_readahead (p, bytes_left);
ret = 0;
}
}
}
SetEvent (input_available_event);
ReleaseMutex (input_mutex);
return ret;
}
bool
fhandler_pty_master::hit_eof ()
{
if (get_ttyp ()->was_opened && !get_ttyp ()->slave_alive ())
{
/* We have the only remaining open handle to this pty, and
the slave pty has been opened at least once. We treat
this as EOF. */
termios_printf ("all other handles closed");
return 1;
}
return 0;
}
/* Process pty output requests */
int
fhandler_pty_master::process_slave_output (char *buf, size_t len, int pktmode_on)
{
size_t rlen;
char outbuf[OUT_BUFFER_SIZE];
DWORD n;
DWORD echo_cnt;
int rc = 0;
flush_to_slave ();
if (len == 0)
goto out;
for (;;)
{
n = echo_cnt = 0;
for (;;)
{
/* Check echo pipe first. */
if (::bytes_available (echo_cnt, echo_r) && echo_cnt > 0)
break;
if (!bytes_available (n))
goto err;
if (n)
break;
if (hit_eof ())
{
set_errno (EIO);
rc = -1;
goto out;
}
/* DISCARD (FLUSHO) and tcflush can finish here. */
if ((get_ttyp ()->ti.c_lflag & FLUSHO || !buf))
goto out;
if (is_nonblocking ())
{
set_errno (EAGAIN);
rc = -1;
goto out;
}
pthread_testcancel ();
if (cygwait (NULL, 10, cw_sig_eintr) == WAIT_SIGNALED
&& !_my_tls.call_signal_handler ())
{
set_errno (EINTR);
rc = -1;
goto out;
}
flush_to_slave ();
}
/* Set RLEN to the number of bytes to read from the pipe. */
rlen = len;
char *optr;
optr = buf;
if (pktmode_on && buf)
{
*optr++ = TIOCPKT_DATA;
rlen -= 1;
}
if (rlen == 0)
{
rc = optr - buf;
goto out;
}
if (rlen > sizeof outbuf)
rlen = sizeof outbuf;
/* If echo pipe has data (something has been typed or pasted), prefer
it over slave output. */
if (echo_cnt > 0)
{
if (!ReadFile (echo_r, outbuf, rlen, &n, NULL))
{
termios_printf ("ReadFile on echo pipe failed, %E");
goto err;
}
}
else if (!ReadFile (get_handle (), outbuf, rlen, &n, NULL))
{
termios_printf ("ReadFile failed, %E");
goto err;
}
termios_printf ("bytes read %u", n);
if (get_ttyp ()->ti.c_lflag & FLUSHO || !buf)
continue;
memcpy (optr, outbuf, n);
optr += n;
rc = optr - buf;
break;
err:
if (GetLastError () == ERROR_BROKEN_PIPE)
rc = 0;
else
{
__seterrno ();
rc = -1;
}
break;
}
out:
termios_printf ("returning %d", rc);
return rc;
}
/* pty slave stuff */
fhandler_pty_slave::fhandler_pty_slave (int unit)
: fhandler_pty_common (), inuse (NULL), output_handle_cyg (NULL),
io_handle_cyg (NULL)
{
if (unit >= 0)
dev ().parse (DEV_PTYS_MAJOR, unit);
}
fhandler_pty_slave::~fhandler_pty_slave ()
{
if (!get_ttyp ())
{
/* Why it comes here? */
init_console_handler (false);
FreeConsole ();
pcon_attached[get_minor ()] = false;
}
else if (getPseudoConsole ())
{
int used = 0;
cygheap_fdenum cfd (false);
while (cfd.next () >= 0)
if (cfd->get_major () == DEV_PTYS_MAJOR &&
cfd->get_minor () == get_minor ())
used ++;
/* Call FreeConsole() if no pty slave on this pty is
opened and the process is attached to the pseudo
console corresponding to this pty. This is needed
to make GNU screen and tmux work in Windows 10 1903. */
if (used == 0 &&
fhandler_console::get_console_process_id (getHelperProcessId (),
true))
{
init_console_handler (false);
FreeConsole ();
pcon_attached[get_minor ()] = false;
}
}
}
int
fhandler_pty_slave::open (int flags, mode_t)
{
HANDLE pty_owner;
HANDLE from_master_local, from_master_cyg_local;
HANDLE 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, &to_master_cyg_local,
&from_master_cyg_local,
NULL
};
for (HANDLE **h = handles; *h; h++)
**h = NULL;
_tc = cygwin_shared->tty[get_minor ()];
tcinit (false);
cygwin_shared->tty.attach (get_minor ());
/* Create synchronisation events */
char buf[MAX_PATH];
const char *errmsg = NULL;
if (!(output_mutex = get_ttyp ()->open_output_mutex (MAXIMUM_ALLOWED)))
{
errmsg = "open output mutex failed, %E";
goto err;
}
if (!(input_mutex = get_ttyp ()->open_input_mutex (MAXIMUM_ALLOWED)))
{
errmsg = "open input mutex failed, %E";
goto err;
}
shared_name (buf, INPUT_AVAILABLE_EVENT, get_minor ());
if (!(input_available_event = OpenEvent (MAXIMUM_ALLOWED, TRUE, buf)))
{
errmsg = "open input event failed, %E";
goto err;
}
/* FIXME: Needs a method to eliminate tty races */
{
/* Create security attribute. Default permissions are 0620. */
security_descriptor sd;
sd.malloc (sizeof (SECURITY_DESCRIPTOR));
RtlCreateSecurityDescriptor (sd, SECURITY_DESCRIPTOR_REVISION);
SECURITY_ATTRIBUTES sa = { sizeof (SECURITY_ATTRIBUTES), NULL, TRUE };
if (!create_object_sd_from_attribute (myself->uid, myself->gid,
S_IFCHR | S_IRUSR | S_IWUSR | S_IWGRP,
sd))
sa.lpSecurityDescriptor = (PSECURITY_DESCRIPTOR) sd;
acquire_output_mutex (INFINITE);
inuse = get_ttyp ()->create_inuse (&sa);
get_ttyp ()->was_opened = true;
release_output_mutex ();
}
if (!get_ttyp ()->from_master () || !get_ttyp ()->from_master_cyg () ||
!get_ttyp ()->to_master () || !get_ttyp ()->to_master_cyg ())
{
errmsg = "pty handles have been closed";
set_errno (EACCES);
goto err_no_errno;
}
/* Three case for duplicating the pipe handles:
- Either we're the master. In this case, just duplicate the handles.
- Or, we have the right to open the master process for handle duplication.
In this case, just duplicate the handles.
- Or, we have to ask the master process itself. In this case, send our
pid to the master process and check the reply. The reply contains
either the handles, or an error code which tells us why we didn't
get the handles. */
if (myself->pid == get_ttyp ()->master_pid)
{
/* This is the most common case, just calling openpty. */
termios_printf ("dup handles within myself.");
pty_owner = GetCurrentProcess ();
}
else
{
pinfo p (get_ttyp ()->master_pid);
if (!p)
termios_printf ("*** couldn't find pty master");
else
{
pty_owner = OpenProcess (PROCESS_DUP_HANDLE, FALSE, p->dwProcessId);
if (pty_owner)
termios_printf ("dup handles directly since I'm the owner");
}
}
if (pty_owner)
{
if (!DuplicateHandle (pty_owner, get_ttyp ()->from_master (),
GetCurrentProcess (), &from_master_local, 0, TRUE,
DUPLICATE_SAME_ACCESS))
{
termios_printf ("can't duplicate input from %u/%p, %E",
get_ttyp ()->master_pid, get_ttyp ()->from_master ());
__seterrno ();
goto err_no_msg;
}
if (!DuplicateHandle (pty_owner, get_ttyp ()->from_master_cyg (),
GetCurrentProcess (), &from_master_cyg_local, 0, TRUE,
DUPLICATE_SAME_ACCESS))
{
termios_printf ("can't duplicate input from %u/%p, %E",
get_ttyp ()->master_pid, get_ttyp ()->from_master_cyg ());
__seterrno ();
goto err_no_msg;
}
if (!DuplicateHandle (pty_owner, get_ttyp ()->to_master (),
GetCurrentProcess (), &to_master_local, 0, TRUE,
DUPLICATE_SAME_ACCESS))
{
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);
}
else
{
pipe_request req = { GetCurrentProcessId () };
pipe_reply repl;
DWORD len;
__small_sprintf (buf, "\\\\.\\pipe\\cygwin-%S-pty%d-master-ctl",
&cygheap->installation_key, get_minor ());
termios_printf ("dup handles via master control pipe %s", buf);
if (!CallNamedPipe (buf, &req, sizeof req, &repl, sizeof repl,
&len, 500))
{
errmsg = "can't call master, %E";
goto err;
}
from_master_local = repl.from_master;
from_master_cyg_local = repl.from_master_cyg;
to_master_local = repl.to_master;
to_master_cyg_local = repl.to_master_cyg;
if (!from_master_local || !from_master_cyg_local ||
!to_master_local || !to_master_cyg_local)
{
SetLastError (repl.error);
errmsg = "error duplicating pipes, %E";
goto err;
}
}
VerifyHandle (from_master_local);
VerifyHandle (from_master_cyg_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 from_master_cyg %p->%p from pty_owner",
get_ttyp ()->from_master_cyg (), from_master_cyg_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_handle (from_master_local);
set_handle_cyg (from_master_cyg_local);
set_output_handle (to_master_local);
set_output_handle_cyg (to_master_cyg_local);
fhandler_console::need_invisible ();
set_open_status ();
return 1;
err:
if (GetLastError () == ERROR_FILE_NOT_FOUND)
set_errno (ENXIO);
else
__seterrno ();
err_no_errno:
termios_printf (errmsg);
err_no_msg:
for (HANDLE **h = handles; *h; h++)
if (**h && **h != INVALID_HANDLE_VALUE)
CloseHandle (**h);
return 0;
}
void
fhandler_pty_slave::open_setup (int flags)
{
set_flags ((flags & ~O_TEXT) | O_BINARY);
myself->set_ctty (this, flags);
report_tty_counts (this, "opened", "");
fhandler_base::open_setup (flags);
}
void
fhandler_pty_slave::cleanup ()
{
/* This used to always call fhandler_pty_common::close when we were execing
but that caused multiple closes of the handles associated with this pty.
Since close_all_files is not called until after the cygwin process has
synced or before a non-cygwin process has exited, it should be safe to
just close this normally. cgf 2006-05-20 */
report_tty_counts (this, "closed", "");
fhandler_base::cleanup ();
}
int
fhandler_pty_slave::close ()
{
termios_printf ("closing last open %s handle", ttyname ());
if (inuse && !CloseHandle (inuse))
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 (!ForceCloseHandle (get_handle_cyg ()))
termios_printf ("CloseHandle (get_handle_cyg ()<%p>), %E",
get_handle_cyg ());
if ((unsigned) myself->ctty == FHDEV (DEV_PTYS_MAJOR, get_minor ()))
fhandler_console::free_console (); /* assumes that we are the last pty closer */
fhandler_pty_common::close ();
if (!ForceCloseHandle (output_mutex))
termios_printf ("CloseHandle (output_mutex<%p>), %E", output_mutex);
if (pcon_attached[get_minor ()])
get_ttyp ()->num_pcon_attached_slaves --;
return 0;
}
int
fhandler_pty_slave::init (HANDLE h, DWORD a, mode_t)
{
int flags = 0;
a &= GENERIC_READ | GENERIC_WRITE;
if (a == GENERIC_READ)
flags = O_RDONLY;
if (a == GENERIC_WRITE)
flags = O_WRONLY;
if (a == (GENERIC_READ | GENERIC_WRITE))
flags = O_RDWR;
int ret = open_with_arch (flags);
if (ret && !cygwin_finished_initializing && !being_debugged ())
{
/* This only occurs when called from dtable::init_std_file_from_handle
We have been started from a non-Cygwin process. So we should become
pty process group leader.
TODO: Investigate how SIGTTIN should be handled with pure-windows
programs. */
pinfo p (tc ()->getpgid ());
/* We should only grab this when the process group owner for this
pty is a non-cygwin process or we've been started directly
from a non-Cygwin process with no Cygwin ancestry. */
if (!p || ISSTATE (p, PID_NOTCYGWIN))
{
termios_printf ("Setting process group leader to %d since %W(%d) is not a cygwin process",
myself->pgid, p->progname, p->pid);
tc ()->setpgid (myself->pgid);
}
}
if (h != INVALID_HANDLE_VALUE)
CloseHandle (h); /* Reopened by open */
return ret;
}
void
fhandler_pty_slave::set_switch_to_pcon (void)
{
if (!pcon_attached[get_minor ()])
{
isHybrid = false;
return;
}
if (!isHybrid)
{
reset_switch_to_pcon ();
return;
}
if (!get_ttyp ()->switch_to_pcon)
{
Sleep (20);
if (get_ttyp ()->pcon_pid == 0 ||
kill (get_ttyp ()->pcon_pid, 0) != 0)
get_ttyp ()->pcon_pid = myself->pid;
get_ttyp ()->switch_to_pcon = true;
}
}
void
fhandler_pty_slave::reset_switch_to_pcon (void)
{
if (ALWAYS_USE_PCON)
return;
if (isHybrid)
{
set_switch_to_pcon ();
return;
}
if (get_ttyp ()->pcon_pid &&
get_ttyp ()->pcon_pid != myself->pid &&
kill (get_ttyp ()->pcon_pid, 0) == 0)
/* There is a process which is grabbing pseudo console. */
return;
if (get_ttyp ()->switch_to_pcon &&
get_ttyp ()->pcon_pid != myself->pid)
{
DWORD mode;
GetConsoleMode (get_handle (), &mode);
SetConsoleMode (get_handle (), mode & ~ENABLE_ECHO_INPUT);
Sleep (60); /* Wait for pty_master_fwd_thread() */
}
get_ttyp ()->pcon_pid = 0;
get_ttyp ()->switch_to_pcon = false;
}
void
fhandler_pty_slave::push_to_pcon_screenbuffer (const char *ptr, size_t len)
{
DWORD pidRestore = 0;
if (!fhandler_console::get_console_process_id (getHelperProcessId (), true))
if (pcon_attached[get_minor ()])
{
Sleep (20);
/* Check again */
if (!fhandler_console::get_console_process_id
(getHelperProcessId (), true))
{
system_printf ("pty%d: pcon_attach mismatch?????? (%p)",
get_minor (), this);
//pcon_attached[get_minor ()] = false;
return;
}
}
/* If not attached pseudo console yet, try to attach temporally. */
if (!pcon_attached[get_minor ()])
{
if (has_master_opened ())
return;
pidRestore =
fhandler_console::get_console_process_id (GetCurrentProcessId (),
false);
/* If pidRestore is not set, give up to push. */
if (!pidRestore)
return;
FreeConsole ();
if (!AttachConsole (getHelperProcessId ()))
{
system_printf ("pty%d: AttachConsole(%d) failed. (%p) %08lx",
get_minor (), getHelperProcessId (),
this, GetLastError ());
goto detach;
}
}
char *buf;
size_t nlen;
DWORD origCP;
origCP = GetConsoleOutputCP ();
SetConsoleOutputCP (get_ttyp ()->TermCodePage);
/* Just copy */
buf = (char *) HeapAlloc (GetProcessHeap (), 0, len);
memcpy (buf, (char *)ptr, len);
nlen = len;
char *p0, *p1;
p0 = p1 = buf;
/* Remove alternate screen buffer drawing */
while (p0 && p1)
{
if (!get_ttyp ()->screen_alternated)
{
/* Check switching to alternate screen buffer */
p0 = (char *) memmem (p1, nlen - (p1-buf), "\033[?1049h", 8);
if (p0)
{
//p0 += 8;
get_ttyp ()->screen_alternated = true;
}
}
if (get_ttyp ()->screen_alternated)
{
/* Check switching to main screen buffer */
p1 = (char *) memmem (p0, nlen - (p0-buf), "\033[?1049l", 8);
if (p1)
{
p1 += 8;
get_ttyp ()->screen_alternated = false;
memmove (p0, p1, buf+nlen - p1);
nlen -= p1 - p0;
}
else
nlen = p0 - buf;
}
}
if (!nlen) /* Nothing to be synchronized */
goto cleanup;
if (check_switch_to_pcon ())
goto cleanup;
/* Remove ESC sequence which returns results to console
input buffer. Without this, cursor position report
is put into the input buffer as a garbage. */
/* Remove ESC sequence to report cursor position. */
while ((p0 = (char *) memmem (buf, nlen, "\033[6n", 4)))
{
memmove (p0, p0+4, nlen - (p0+4 - buf));
nlen -= 4;
}
/* Remove ESC sequence to report terminal identity. */
while ((p0 = (char *) memmem (buf, nlen, "\033[0c", 4)))
{
memmove (p0, p0+4, nlen - (p0+4 - buf));
nlen -= 4;
}
DWORD dwMode, flags;
flags = ENABLE_VIRTUAL_TERMINAL_PROCESSING;
GetConsoleMode (get_output_handle (), &dwMode);
if (!(get_ttyp ()->ti.c_oflag & OPOST) ||
!(get_ttyp ()->ti.c_oflag & ONLCR))
flags |= DISABLE_NEWLINE_AUTO_RETURN;
SetConsoleMode (get_output_handle (), dwMode | flags);
char *p;
p = buf;
DWORD wLen, written;
written = 0;
int retry_count;
retry_count = 0;
BOOL (WINAPI *WriteFunc)
(HANDLE, LPCVOID, DWORD, LPDWORD, LPOVERLAPPED);
WriteFunc = WriteFile_Orig ? WriteFile_Orig : WriteFile;
while (written < nlen)
{
if (!WriteFunc (get_output_handle (), p, nlen - written, &wLen, NULL))
{
termios_printf ("WriteFile failed, %E");
this->open (0, 0); /* Re-open handles */
/* Fix pseudo console window size */
struct winsize win;
this->ioctl (TIOCGWINSZ, &win);
this->ioctl (TIOCSWINSZ, &win);
if (++retry_count > 3)
break;
}
written += wLen;
p += wLen;
}
/* Detach from pseudo console and resume. */
SetConsoleMode (get_output_handle (), dwMode);
cleanup:
SetConsoleOutputCP (origCP);
HeapFree (GetProcessHeap (), 0, buf);
detach:
if (!pcon_attached[get_minor ()])
{
FreeConsole ();
if (!AttachConsole (pidRestore))
{
system_printf ("pty%d: AttachConsole(%d) failed. (%p) %08lx",
get_minor (), pidRestore, this, GetLastError ());
pcon_attached[get_minor ()] = false;
}
}
}
bool
fhandler_pty_slave::has_master_opened (void)
{
cygheap_fdenum cfd (false);
while (cfd.next () >= 0)
if (cfd->get_major () == DEV_PTYM_MAJOR &&
cfd->get_minor () == get_minor ())
return true;
return false;
}
ssize_t __stdcall
fhandler_pty_slave::write (const void *ptr, size_t len)
{
ssize_t towrite = len;
bg_check_types bg = bg_check (SIGTTOU);
if (bg <= bg_eof)
return (ssize_t) bg;
termios_printf ("pty%d, write(%p, %lu)", get_minor (), ptr, len);
push_process_state process_state (PID_TTYOU);
reset_switch_to_pcon ();
char *buf;
ssize_t nlen;
UINT targetCodePage = (check_switch_to_pcon ()) ?
GetConsoleOutputCP () : get_ttyp ()->TermCodePage;
if (targetCodePage != get_ttyp ()->TermCodePage)
{
size_t wlen =
MultiByteToWideChar (get_ttyp ()->TermCodePage, 0,
(char *)ptr, len, NULL, 0);
wchar_t *wbuf = (wchar_t *)
HeapAlloc (GetProcessHeap (), 0, wlen * sizeof (wchar_t));
wlen =
MultiByteToWideChar (get_ttyp ()->TermCodePage, 0,
(char *)ptr, len, wbuf, wlen);
nlen = WideCharToMultiByte (targetCodePage, 0,
wbuf, wlen, NULL, 0, NULL, NULL);
buf = (char *) HeapAlloc (GetProcessHeap (), 0, nlen);
nlen = WideCharToMultiByte (targetCodePage, 0,
wbuf, wlen, buf, nlen, NULL, NULL);
HeapFree (GetProcessHeap (), 0, wbuf);
}
else
{
/* Just copy */
buf = (char *) HeapAlloc (GetProcessHeap (), 0, len);
memcpy (buf, (char *)ptr, len);
nlen = len;
}
DWORD dwMode, flags;
flags = ENABLE_VIRTUAL_TERMINAL_PROCESSING;
if (!(get_ttyp ()->ti.c_oflag & OPOST) ||
!(get_ttyp ()->ti.c_oflag & ONLCR))
flags |= DISABLE_NEWLINE_AUTO_RETURN;
if (check_switch_to_pcon ())
{
GetConsoleMode (get_output_handle (), &dwMode);
SetConsoleMode (get_output_handle (), dwMode | flags);
}
HANDLE to =
check_switch_to_pcon () ? get_output_handle () : get_output_handle_cyg ();
acquire_output_mutex (INFINITE);
if (!process_opost_output (to, buf, nlen, false))
{
DWORD err = GetLastError ();
termios_printf ("WriteFile failed, %E");
switch (err)
{
case ERROR_NO_DATA:
err = ERROR_IO_DEVICE;
/*FALLTHRU*/
default:
__seterrno_from_win_error (err);
}
towrite = -1;
}
release_output_mutex ();
HeapFree (GetProcessHeap (), 0, buf);
flags = ENABLE_VIRTUAL_TERMINAL_PROCESSING;
if (check_switch_to_pcon ())
SetConsoleMode (get_output_handle (), dwMode | flags);
/* Push slave output to pseudo console screen buffer */
if (getPseudoConsole ())
{
acquire_output_mutex (INFINITE);
push_to_pcon_screenbuffer ((char *)ptr, len);
release_output_mutex ();
}
return towrite;
}
void __reg3
fhandler_pty_slave::read (void *ptr, size_t& len)
{
char *ptr0 = (char *)ptr;
ssize_t totalread = 0;
int vmin = 0;
int vtime = 0; /* Initialized to prevent -Wuninitialized warning */
size_t readlen;
DWORD bytes_in_pipe;
char buf[INP_BUFFER_SIZE];
DWORD time_to_wait;
bg_check_types bg = bg_check (SIGTTIN);
if (bg <= bg_eof)
{
len = (size_t) bg;
return;
}
termios_printf ("read(%p, %lu) handle %p", ptr, len, get_handle_cyg ());
push_process_state process_state (PID_TTYIN);
if (ptr) /* Indicating not tcflush(). */
{
reset_switch_to_pcon ();
if (get_ttyp ()->pcon_pid != myself->pid)
mask_switch_to_pcon (true);
}
if (is_nonblocking () || !ptr) /* Indicating tcflush(). */
time_to_wait = 0;
else if ((get_ttyp ()->ti.c_lflag & ICANON))
time_to_wait = INFINITE;
else
{
vmin = get_ttyp ()->ti.c_cc[VMIN];
if (vmin > INP_BUFFER_SIZE)
vmin = INP_BUFFER_SIZE;
vtime = get_ttyp ()->ti.c_cc[VTIME];
if (vmin < 0)
vmin = 0;
if (vtime < 0)
vtime = 0;
if (!vmin && !vtime)
time_to_wait = 0;
else
time_to_wait = !vtime ? INFINITE : 100 * vtime;
}
while (len)
{
switch (cygwait (input_available_event, time_to_wait))
{
case WAIT_OBJECT_0:
break;
case WAIT_SIGNALED:
if (totalread > 0)
goto out;
termios_printf ("wait catched signal");
set_sig_errno (EINTR);
totalread = -1;
goto out;
case WAIT_CANCELED:
process_state.pop ();
pthread::static_cancel_self ();
/*NOTREACHED*/
case WAIT_TIMEOUT:
termios_printf ("wait timed out, time_to_wait %u", time_to_wait);
/* No error condition when called from tcflush. */
if (!totalread && ptr)
{
set_sig_errno (EAGAIN);
totalread = -1;
}
goto out;
default:
termios_printf ("wait for input event failed, %E");
if (!totalread)
{
__seterrno ();
totalread = -1;
}
goto out;
}
/* Now that we know that input is available we have to grab the
input mutex. */
switch (cygwait (input_mutex, 1000))
{
case WAIT_OBJECT_0:
case WAIT_ABANDONED_0:
break;
case WAIT_SIGNALED:
if (totalread > 0)
goto out;
termios_printf ("wait for mutex caught signal");
set_sig_errno (EINTR);
totalread = -1;
goto out;
case WAIT_CANCELED:
process_state.pop ();
pthread::static_cancel_self ();
/*NOTREACHED*/
case WAIT_TIMEOUT:
termios_printf ("failed to acquire input mutex after input event "
"arrived");
/* If we have a timeout, we can simply handle this failure to
grab the mutex as an EAGAIN situation. Otherwise, if this
is an infinitely blocking read, restart the loop. */
if (time_to_wait != INFINITE)
{
if (!totalread)
{
set_sig_errno (EAGAIN);
totalread = -1;
}
goto out;
}
continue;
default:
termios_printf ("wait for input mutex failed, %E");
if (!totalread)
{
__seterrno ();
totalread = -1;
}
goto out;
}
if (check_switch_to_pcon () &&
!get_ttyp ()->mask_switch_to_pcon)
{
DWORD dwMode;
GetConsoleMode (get_handle (), &dwMode);
DWORD flags = ENABLE_VIRTUAL_TERMINAL_INPUT;
if (get_ttyp ()->ti.c_lflag & ECHO)
flags |= ENABLE_ECHO_INPUT;
if (get_ttyp ()->ti.c_lflag & ICANON)
flags |= ENABLE_LINE_INPUT;
if (flags & ENABLE_ECHO_INPUT && !(flags & ENABLE_LINE_INPUT))
flags &= ~ENABLE_ECHO_INPUT;
if ((get_ttyp ()->ti.c_lflag & ISIG) &&
!(get_ttyp ()->ti.c_iflag & IGNBRK))
flags |= ENABLE_PROCESSED_INPUT;
if (dwMode != flags)
SetConsoleMode (get_handle (), flags);
/* Read get_handle() instad of get_handle_cyg() */
BOOL (WINAPI *ReadFunc)
(HANDLE, LPVOID, DWORD, LPDWORD, LPOVERLAPPED);
ReadFunc = ReadFile_Orig ? ReadFile_Orig : ReadFile;
DWORD rlen;
if (!ReadFunc (get_handle (), ptr, len, &rlen, NULL))
{
termios_printf ("read failed, %E");
ReleaseMutex (input_mutex);
set_errno (EIO);
totalread = -1;
goto out;
}
INPUT_RECORD inp[128];
DWORD n;
BOOL (WINAPI *PeekFunc)
(HANDLE, PINPUT_RECORD, DWORD, LPDWORD);
PeekFunc =
PeekConsoleInputA_Orig ? PeekConsoleInputA_Orig : PeekConsoleInput;
PeekFunc (get_handle (), inp, 128, &n);
bool pipe_empty = true;
while (n-- > 0)
if (inp[n].EventType == KEY_EVENT && inp[n].Event.KeyEvent.bKeyDown)
pipe_empty = false;
if (pipe_empty)
ResetEvent (input_available_event);
ReleaseMutex (input_mutex);
len = rlen;
return;
}
if (!bytes_available (bytes_in_pipe))
{
ReleaseMutex (input_mutex);
set_errno (EIO);
totalread = -1;
goto out;
}
if (ptr && !bytes_in_pipe && !vmin && !time_to_wait)
{
ReleaseMutex (input_mutex);
mask_switch_to_pcon (false);
len = (size_t) bytes_in_pipe;
return;
}
readlen = bytes_in_pipe ? MIN (len, sizeof (buf)) : 0;
if (get_ttyp ()->ti.c_lflag & ICANON && ptr)
readlen = MIN (bytes_in_pipe, readlen);
#if 0
/* Why on earth is the read length reduced to vmin, even if more bytes
are available *and* len is bigger *and* the local buf is big enough?
Disable this code for now, it looks like a remnant of old. */
if (ptr && vmin && readlen > (unsigned) vmin)
readlen = vmin;
#endif
DWORD n = 0;
if (readlen)
{
termios_printf ("reading %lu bytes (vtime %d)", readlen, vtime);
if (!ReadFile (get_handle_cyg (), buf, readlen, &n, NULL))
{
termios_printf ("read failed, %E");
ReleaseMutex (input_mutex);
set_errno (EIO);
totalread = -1;
goto out;
}
else
{
/* MSDN states that 5th prameter can be used to determine total
number of bytes in pipe, but for some reason this number doesn't
change after successful read. So we have to peek into the pipe
again to see if input is still available */
if (!bytes_available (bytes_in_pipe))
{
ReleaseMutex (input_mutex);
set_errno (EIO);
totalread = -1;
goto out;
}
if (n)
{
if (!(!ptr && len == UINT_MAX)) /* not tcflush() */
len -= n;
totalread += n;
if (ptr)
{
memcpy (ptr, buf, n);
ptr = (char *) ptr + n;
}
}
}
}
if (!bytes_in_pipe)
ResetEvent (input_available_event);
ReleaseMutex (input_mutex);
if (!ptr)
{
if (!bytes_in_pipe)
break;
continue;
}
if (get_ttyp ()->read_retval < 0) // read error
{
set_errno (-get_ttyp ()->read_retval);
totalread = -1;
break;
}
if (get_ttyp ()->read_retval == 0) //EOF
{
termios_printf ("saw EOF");
break;
}
if (get_ttyp ()->ti.c_lflag & ICANON || is_nonblocking ())
break;
if (vmin && totalread >= vmin)
break;
/* vmin == 0 && vtime == 0:
* we've already read all input, if any, so return immediately
* vmin == 0 && vtime > 0:
* we've waited for input 10*vtime ms in WFSO(input_available_event),
* no matter whether any input arrived, we shouldn't wait any longer,
* so return immediately
* vmin > 0 && vtime == 0:
* here, totalread < vmin, so continue waiting until more data
* arrive
* vmin > 0 && vtime > 0:
* similar to the previous here, totalread < vmin, and timer
* hadn't expired -- WFSO(input_available_event) != WAIT_TIMEOUT,
* so "restart timer" and wait until more data arrive
*/
if (vmin == 0)
break;
}
out:
termios_printf ("%d = read(%p, %lu)", totalread, ptr, len);
len = (size_t) totalread;
/* Push slave read as echo to pseudo console screen buffer. */
if (getPseudoConsole () && ptr0 && (get_ttyp ()->ti.c_lflag & ECHO))
{
acquire_output_mutex (INFINITE);
push_to_pcon_screenbuffer (ptr0, len);
release_output_mutex ();
}
mask_switch_to_pcon (false);
}
int
fhandler_pty_slave::dup (fhandler_base *child, int flags)
{
/* This code was added in Oct 2001 for some undisclosed reason.
However, setting the controlling tty on a dup causes rxvt to
hang when the parent does a dup since the controlling pgid changes.
Specifically testing for -2 (ctty has been setsid'ed) works around
this problem. However, it's difficult to see scenarios in which you
have a dup'able fd, no controlling tty, and not having run setsid.
So, we might want to consider getting rid of the set_ctty in tty-like dup
methods entirely at some point */
if (myself->ctty != -2)
myself->set_ctty (this, flags);
report_tty_counts (child, "duped slave", "");
return 0;
}
int
fhandler_pty_master::dup (fhandler_base *child, int)
{
report_tty_counts (child, "duped master", "");
return 0;
}
int
fhandler_pty_slave::tcgetattr (struct termios *t)
{
reset_switch_to_pcon ();
*t = get_ttyp ()->ti;
return 0;
}
int
fhandler_pty_slave::tcsetattr (int, const struct termios *t)
{
reset_switch_to_pcon ();
acquire_output_mutex (INFINITE);
get_ttyp ()->ti = *t;
release_output_mutex ();
return 0;
}
int
fhandler_pty_slave::tcflush (int queue)
{
int ret = 0;
termios_printf ("tcflush(%d) handle %p", queue, get_handle_cyg ());
reset_switch_to_pcon ();
if (queue == TCIFLUSH || queue == TCIOFLUSH)
{
size_t len = UINT_MAX;
read (NULL, len);
ret = ((int) len) >= 0 ? 0 : -1;
}
if (queue == TCOFLUSH || queue == TCIOFLUSH)
{
/* do nothing for now. */
}
termios_printf ("%d=tcflush(%d)", ret, queue);
return ret;
}
int
fhandler_pty_slave::ioctl (unsigned int cmd, void *arg)
{
termios_printf ("ioctl (%x)", cmd);
reset_switch_to_pcon ();
int res = fhandler_termios::ioctl (cmd, arg);
if (res <= 0)
return res;
if (myself->pgid && get_ttyp ()->getpgid () != myself->pgid
&& (unsigned) myself->ctty == FHDEV (DEV_PTYS_MAJOR, get_minor ())
&& (get_ttyp ()->ti.c_lflag & TOSTOP))
{
/* background process */
termios_printf ("bg ioctl pgid %d, tpgid %d, %s", myself->pgid,
get_ttyp ()->getpgid (), myctty ());
raise (SIGTTOU);
}
int retval;
switch (cmd)
{
case TIOCGWINSZ:
case TIOCSWINSZ:
break;
case TIOCGPGRP:
{
pid_t pid = this->tcgetpgrp ();
if (pid < 0)
retval = -1;
else
{
*((pid_t *) arg) = pid;
retval = 0;
}
}
goto out;
case TIOCSPGRP:
retval = this->tcsetpgrp ((pid_t) (intptr_t) arg);
goto out;
case FIONREAD:
{
DWORD n;
if (!bytes_available (n))
{
set_errno (EINVAL);
retval = -1;
}
else
{
*(int *) arg = (int) n;
retval = 0;
}
}
goto out;
default:
return fhandler_base::ioctl (cmd, arg);
}
acquire_output_mutex (INFINITE);
get_ttyp ()->cmd = cmd;
get_ttyp ()->ioctl_retval = 0;
switch (cmd)
{
case TIOCGWINSZ:
get_ttyp ()->arg.winsize = get_ttyp ()->winsize;
*(struct winsize *) arg = get_ttyp ()->arg.winsize;
get_ttyp ()->winsize = get_ttyp ()->arg.winsize;
break;
case TIOCSWINSZ:
if (getPseudoConsole ())
{
/* If not attached pseudo console yet, try to attach
temporally. */
DWORD pidRestore = 0;
if (!pcon_attached[get_minor ()])
{
if (has_master_opened () && get_ttyp ()->attach_pcon_in_fork)
goto resize_cyg;
pidRestore = fhandler_console::get_console_process_id
(GetCurrentProcessId (), false);
/* This happens at mintty startup if fhandler_console::
need_invisible() is called in stdio_init() in dtable.cc */
if (!pidRestore) /* Give up to resize pseudo console */
goto resize_cyg;
FreeConsole ();
if (!AttachConsole (getHelperProcessId ()))
{
system_printf ("pty%d: AttachConsole(%d) failed. (%p) %08lx",
get_minor(), getHelperProcessId (),
this, GetLastError ());
goto cleanup;
}
}
COORD size;
size.X = ((struct winsize *) arg)->ws_col;
size.Y = ((struct winsize *) arg)->ws_row;
CONSOLE_SCREEN_BUFFER_INFO csbi;
if (GetConsoleScreenBufferInfo (get_output_handle (), &csbi))
if (size.X == csbi.srWindow.Right - csbi.srWindow.Left + 1 &&
size.Y == csbi.srWindow.Bottom - csbi.srWindow.Top + 1)
goto cleanup;
if (!SetConsoleScreenBufferSize (get_output_handle (), size))
goto cleanup;
SMALL_RECT rect;
rect.Left = 0;
rect.Top = 0;
rect.Right = size.X-1;
rect.Bottom = size.Y-1;
SetConsoleWindowInfo (get_output_handle (), TRUE, &rect);
cleanup:
/* Detach from pseudo console and resume. */
if (pidRestore)
{
FreeConsole ();
if (!AttachConsole (pidRestore))
{
system_printf ("pty%d: AttachConsole(%d) failed. (%p) %08lx",
get_minor (), pidRestore,
this, GetLastError ());
pcon_attached[get_minor ()] = false;
}
}
}
resize_cyg:
if (get_ttyp ()->winsize.ws_row != ((struct winsize *) arg)->ws_row
|| get_ttyp ()->winsize.ws_col != ((struct winsize *) arg)->ws_col)
{
get_ttyp ()->arg.winsize = *(struct winsize *) arg;
get_ttyp ()->winsize = *(struct winsize *) arg;
get_ttyp ()->kill_pgrp (SIGWINCH);
}
break;
}
release_output_mutex ();
retval = get_ttyp ()->ioctl_retval;
if (retval < 0)
{
set_errno (-retval);
retval = -1;
}
out:
termios_printf ("%d = ioctl(%x)", retval, cmd);
return retval;
}
int __reg2
fhandler_pty_slave::fstat (struct stat *st)
{
fhandler_base::fstat (st);
bool to_close = false;
if (!input_available_event)
{
char buf[MAX_PATH];
shared_name (buf, INPUT_AVAILABLE_EVENT, get_minor ());
input_available_event = OpenEvent (READ_CONTROL, TRUE, buf);
if (input_available_event)
to_close = true;
}
st->st_mode = S_IFCHR;
if (!input_available_event
|| get_object_attribute (input_available_event, &st->st_uid, &st->st_gid,
&st->st_mode))
{
/* If we can't access the ACL, or if the tty doesn't actually exist,
then fake uid and gid to strict, system-like values. */
st->st_mode = S_IFCHR | S_IRUSR | S_IWUSR;
st->st_uid = 18;
st->st_gid = 544;
}
if (to_close)
CloseHandle (input_available_event);
return 0;
}
int __reg3
fhandler_pty_slave::facl (int cmd, int nentries, aclent_t *aclbufp)
{
int res = -1;
bool to_close = false;
security_descriptor sd;
mode_t attr = S_IFCHR;
switch (cmd)
{
case SETACL:
if (!aclsort32 (nentries, 0, aclbufp))
set_errno (ENOTSUP);
break;
case GETACL:
if (!aclbufp)
{
set_errno (EFAULT);
break;
}
/*FALLTHRU*/
case GETACLCNT:
if (!input_available_event)
{
char buf[MAX_PATH];
shared_name (buf, INPUT_AVAILABLE_EVENT, get_minor ());
input_available_event = OpenEvent (READ_CONTROL, TRUE, buf);
if (input_available_event)
to_close = true;
}
if (!input_available_event
|| get_object_sd (input_available_event, sd))
{
res = get_posix_access (NULL, &attr, NULL, NULL, aclbufp, nentries);
if (aclbufp && res == MIN_ACL_ENTRIES)
{
aclbufp[0].a_perm = S_IROTH | S_IWOTH;
aclbufp[0].a_id = 18;
aclbufp[1].a_id = 544;
}
break;
}
if (cmd == GETACL)
res = get_posix_access (sd, &attr, NULL, NULL, aclbufp, nentries);
else
res = get_posix_access (sd, &attr, NULL, NULL, NULL, 0);
break;
default:
set_errno (EINVAL);
break;
}
if (to_close)
CloseHandle (input_available_event);
return res;
}
/* Helper function for fchmod and fchown, which just opens all handles
and signals success via bool return. */
bool
fhandler_pty_slave::fch_open_handles (bool chown)
{
char buf[MAX_PATH];
DWORD write_access = WRITE_DAC | (chown ? WRITE_OWNER : 0);
_tc = cygwin_shared->tty[get_minor ()];
shared_name (buf, INPUT_AVAILABLE_EVENT, get_minor ());
input_available_event = OpenEvent (READ_CONTROL | write_access,
TRUE, buf);
output_mutex = get_ttyp ()->open_output_mutex (write_access);
input_mutex = get_ttyp ()->open_input_mutex (write_access);
inuse = get_ttyp ()->open_inuse (write_access);
if (!input_available_event || !output_mutex || !input_mutex || !inuse)
{
__seterrno ();
return false;
}
return true;
}
/* Helper function for fchmod and fchown, which sets the new security
descriptor on all objects representing the pty. */
int
fhandler_pty_slave::fch_set_sd (security_descriptor &sd, bool chown)
{
security_descriptor sd_old;
get_object_sd (input_available_event, sd_old);
if (!set_object_sd (input_available_event, sd, chown)
&& !set_object_sd (output_mutex, sd, chown)
&& !set_object_sd (input_mutex, sd, chown)
&& !set_object_sd (inuse, sd, chown))
return 0;
set_object_sd (input_available_event, sd_old, chown);
set_object_sd (output_mutex, sd_old, chown);
set_object_sd (input_mutex, sd_old, chown);
set_object_sd (inuse, sd_old, chown);
return -1;
}
/* Helper function for fchmod and fchown, which closes all object handles in
the pty. */
void
fhandler_pty_slave::fch_close_handles ()
{
close_maybe (input_available_event);
close_maybe (output_mutex);
close_maybe (input_mutex);
close_maybe (inuse);
}
int __reg1
fhandler_pty_slave::fchmod (mode_t mode)
{
int ret = -1;
bool to_close = false;
security_descriptor sd;
uid_t uid;
gid_t gid;
mode_t orig_mode = S_IFCHR;
if (!input_available_event)
{
to_close = true;
if (!fch_open_handles (false))
goto errout;
}
sd.malloc (sizeof (SECURITY_DESCRIPTOR));
RtlCreateSecurityDescriptor (sd, SECURITY_DESCRIPTOR_REVISION);
if (!get_object_attribute (input_available_event, &uid, &gid, &orig_mode)
&& !create_object_sd_from_attribute (uid, gid, S_IFCHR | mode, sd))
ret = fch_set_sd (sd, false);
errout:
if (to_close)
fch_close_handles ();
return ret;
}
int __reg2
fhandler_pty_slave::fchown (uid_t uid, gid_t gid)
{
int ret = -1;
bool to_close = false;
security_descriptor sd;
uid_t o_uid;
gid_t o_gid;
mode_t mode = S_IFCHR;
if (uid == ILLEGAL_UID && gid == ILLEGAL_GID)
return 0;
if (!input_available_event)
{
to_close = true;
if (!fch_open_handles (true))
goto errout;
}
sd.malloc (sizeof (SECURITY_DESCRIPTOR));
RtlCreateSecurityDescriptor (sd, SECURITY_DESCRIPTOR_REVISION);
if (!get_object_attribute (input_available_event, &o_uid, &o_gid, &mode))
{
if (uid == ILLEGAL_UID)
uid = o_uid;
if (gid == ILLEGAL_GID)
gid = o_gid;
if (uid == o_uid && gid == o_gid)
ret = 0;
else if (!create_object_sd_from_attribute (uid, gid, mode, sd))
ret = fch_set_sd (sd, true);
}
errout:
if (to_close)
fch_close_handles ();
return ret;
}
/*******************************************************
fhandler_pty_master
*/
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),
from_slave (NULL), to_slave (NULL), echo_r (NULL), echo_w (NULL),
dwProcessId (0), to_master_cyg (NULL), from_master_cyg (NULL),
master_fwd_thread (NULL)
{
if (unit >= 0)
dev ().parse (DEV_PTYM_MAJOR, unit);
else if (!setup ())
{
dev ().parse (FH_ERROR);
return;
}
set_name ("/dev/ptmx");
}
fhandler_pty_master::~fhandler_pty_master ()
{
/* Without this wait, helper process for pseudo console
sometimes remains running after the pty session is
closed. The reason is not clear. */
if (to_master && from_master)
Sleep (20);
}
int
fhandler_pty_master::open (int flags, mode_t)
{
set_open_status ();
dwProcessId = GetCurrentProcessId ();
return 1;
}
void
fhandler_pty_master::open_setup (int flags)
{
set_flags ((flags & ~O_TEXT) | O_BINARY);
char buf[sizeof ("opened pty master for ptyNNNNNNNNNNN")];
__small_sprintf (buf, "opened pty master for pty%d", get_minor ());
report_tty_counts (this, buf, "");
fhandler_base::open_setup (flags);
}
off_t
fhandler_pty_common::lseek (off_t, int)
{
set_errno (ESPIPE);
return -1;
}
int
fhandler_pty_common::close ()
{
termios_printf ("pty%d <%p,%p> closing",
get_minor (), get_handle (), get_output_handle ());
if (!ForceCloseHandle (input_mutex))
termios_printf ("CloseHandle (input_mutex<%p>), %E", input_mutex);
if (!ForceCloseHandle1 (get_handle (), from_pty))
termios_printf ("CloseHandle (get_handle ()<%p>), %E", get_handle ());
if (!ForceCloseHandle1 (get_output_handle (), to_pty))
termios_printf ("CloseHandle (get_output_handle ()<%p>), %E",
get_output_handle ());
return 0;
}
void
fhandler_pty_master::cleanup ()
{
report_tty_counts (this, "closing master", "");
if (archetype)
from_master = from_master_cyg =
to_master = to_master_cyg = from_slave = to_slave = NULL;
fhandler_base::cleanup ();
}
int
fhandler_pty_master::close ()
{
OBJECT_BASIC_INFORMATION obi;
NTSTATUS status;
pid_t master_pid_tmp = get_ttyp ()->master_pid;
termios_printf ("closing from_master(%p)/from_master_cyg(%p)/to_master(%p)/to_master_cyg(%p) since we own them(%u)",
from_master, from_master_cyg,
to_master, to_master_cyg, dwProcessId);
if (cygwin_finished_initializing)
{
if (master_ctl && get_ttyp ()->master_pid == myself->pid)
{
char buf[MAX_PATH];
pipe_request req = { (DWORD) -1 };
pipe_reply repl;
DWORD len;
__small_sprintf (buf, "\\\\.\\pipe\\cygwin-%S-pty%d-master-ctl",
&cygheap->installation_key, get_minor ());
acquire_output_mutex (INFINITE);
if (master_ctl)
{
CallNamedPipe (buf, &req, sizeof req, &repl, sizeof repl, &len,
500);
CloseHandle (master_ctl);
master_thread->detach ();
get_ttyp ()->set_master_ctl_closed ();
master_ctl = NULL;
}
release_output_mutex ();
master_fwd_thread->terminate_thread ();
}
}
/* Check if the last master handle has been closed. If so, set
input_available_event to wake up potentially waiting slaves. */
acquire_output_mutex (INFINITE);
status = NtQueryObject (get_output_handle (), ObjectBasicInformation,
&obi, sizeof obi, NULL);
fhandler_pty_common::close ();
release_output_mutex ();
if (!ForceCloseHandle (output_mutex))
termios_printf ("CloseHandle (output_mutex<%p>), %E", output_mutex);
if (!NT_SUCCESS (status))
debug_printf ("NtQueryObject: %y", status);
else if (obi.HandleCount == (getPseudoConsole () ? 2 : 1))
/* Helper process has inherited one. */
{
termios_printf("Closing last master of pty%d", get_minor ());
/* Close Pseudo Console */
if (getPseudoConsole ())
{
/* Terminate helper process */
SetEvent (get_ttyp ()->hHelperGoodbye);
WaitForSingleObject (get_ttyp ()->hHelperProcess, INFINITE);
/* FIXME: Pseudo console can be accessed via its handle
only in the process which created it. What else can we do? */
if (master_pid_tmp == myself->pid)
{
/* Release pseudo console */
HMODULE hModule = GetModuleHandle ("kernel32.dll");
FARPROC func = GetProcAddress (hModule, "ClosePseudoConsole");
VOID (WINAPI *ClosePseudoConsole) (HPCON) = NULL;
ClosePseudoConsole = (VOID (WINAPI *) (HPCON)) func;
ClosePseudoConsole (getPseudoConsole ());
}
get_ttyp ()->hPseudoConsole = NULL;
get_ttyp ()->switch_to_pcon = false;
}
if (get_ttyp ()->getsid () > 0)
kill (get_ttyp ()->getsid (), SIGHUP);
SetEvent (input_available_event);
}
if (!ForceCloseHandle (from_master))
termios_printf ("error closing from_master %p, %E", from_master);
if (from_master_cyg != from_master) /* Avoid double close. */
if (!ForceCloseHandle (from_master_cyg))
termios_printf ("error closing from_master_cyg %p, %E", from_master_cyg);
if (!ForceCloseHandle (to_master))
termios_printf ("error closing to_master %p, %E", to_master);
from_master = to_master = NULL;
if (!ForceCloseHandle (from_slave))
termios_printf ("error closing from_slave %p, %E", from_slave);
from_slave = NULL;
if (!ForceCloseHandle (to_master_cyg))
termios_printf ("error closing to_master_cyg %p, %E", to_master_cyg);
to_master_cyg = from_master_cyg = NULL;
ForceCloseHandle (echo_r);
ForceCloseHandle (echo_w);
echo_r = echo_w = NULL;
if (to_slave)
ForceCloseHandle (to_slave);
to_slave = NULL;
if (have_execed || get_ttyp ()->master_pid != myself->pid)
termios_printf ("not clearing: %d, master_pid %d",
have_execed, get_ttyp ()->master_pid);
if (!ForceCloseHandle (input_available_event))
termios_printf ("CloseHandle (input_available_event<%p>), %E",
input_available_event);
return 0;
}
ssize_t __stdcall
fhandler_pty_master::write (const void *ptr, size_t len)
{
ssize_t ret;
char *p = (char *) ptr;
termios ti = tc ()->ti;
bg_check_types bg = bg_check (SIGTTOU);
if (bg <= bg_eof)
return (ssize_t) bg;
push_process_state process_state (PID_TTYOU);
/* Write terminal input to to_slave pipe instead of output_handle
if current application is native console application. */
if (check_switch_to_pcon () &&
!get_ttyp ()->mask_switch_to_pcon)
{
char *buf;
size_t nlen;
if (get_ttyp ()->TermCodePage != CP_UTF8)
{
size_t wlen =
MultiByteToWideChar (get_ttyp ()->TermCodePage, 0,
(char *)ptr, len, NULL, 0);
wchar_t *wbuf = (wchar_t *)
HeapAlloc (GetProcessHeap (), 0, wlen * sizeof (wchar_t));
wlen =
MultiByteToWideChar (get_ttyp ()->TermCodePage, 0,
(char *)ptr, len, wbuf, wlen);
nlen = WideCharToMultiByte (CP_UTF8, 0,
wbuf, wlen, NULL, 0, NULL, NULL);
buf = (char *) HeapAlloc (GetProcessHeap (), 0, nlen);
nlen = WideCharToMultiByte (CP_UTF8, 0,
wbuf, wlen, buf, nlen, NULL, NULL);
HeapFree (GetProcessHeap (), 0, wbuf);
}
else
{
/* Just copy */
buf = (char *) HeapAlloc (GetProcessHeap (), 0, len);
memcpy (buf, (char *)ptr, len);
nlen = len;
}
DWORD wLen;
WriteFile (to_slave, buf, nlen, &wLen, NULL);
SetEvent (input_available_event);
HeapFree (GetProcessHeap (), 0, buf);
return len;
}
line_edit_status status = line_edit (p++, len, ti, &ret);
if (status > line_edit_signalled && status != line_edit_pipe_full)
ret = -1;
return ret;
}
void __reg3
fhandler_pty_master::read (void *ptr, size_t& len)
{
bg_check_types bg = bg_check (SIGTTIN);
if (bg <= bg_eof)
{
len = (size_t) bg;
return;
}
push_process_state process_state (PID_TTYIN);
len = (size_t) process_slave_output ((char *) ptr, len, pktmode);
}
int
fhandler_pty_master::tcgetattr (struct termios *t)
{
*t = cygwin_shared->tty[get_minor ()]->ti;
return 0;
}
int
fhandler_pty_master::tcsetattr (int, const struct termios *t)
{
cygwin_shared->tty[get_minor ()]->ti = *t;
return 0;
}
int
fhandler_pty_master::tcflush (int queue)
{
int ret = 0;
termios_printf ("tcflush(%d) handle %p", queue, get_handle ());
if (queue == TCIFLUSH || queue == TCIOFLUSH)
ret = process_slave_output (NULL, OUT_BUFFER_SIZE, 0);
else if (queue == TCIFLUSH || queue == TCIOFLUSH)
{
/* do nothing for now. */
}
termios_printf ("%d=tcflush(%d)", ret, queue);
return ret;
}
int
fhandler_pty_master::ioctl (unsigned int cmd, void *arg)
{
int res = fhandler_termios::ioctl (cmd, arg);
if (res <= 0)
return res;
switch (cmd)
{
case TIOCPKT:
pktmode = *(int *) arg;
break;
case TIOCGWINSZ:
*(struct winsize *) arg = get_ttyp ()->winsize;
break;
case TIOCSWINSZ:
/* FIXME: Pseudo console can be accessed via its handle
only in the process which created it. What else can we do? */
if (getPseudoConsole () && get_ttyp ()->master_pid == myself->pid)
{
HMODULE hModule = GetModuleHandle ("kernel32.dll");
FARPROC func = GetProcAddress (hModule, "ResizePseudoConsole");
HRESULT (WINAPI *ResizePseudoConsole) (HPCON, COORD) = NULL;
ResizePseudoConsole = (HRESULT (WINAPI *) (HPCON, COORD)) func;
COORD size;
size.X = ((struct winsize *) arg)->ws_col;
size.Y = ((struct winsize *) arg)->ws_row;
ResizePseudoConsole (getPseudoConsole (), size);
}
if (get_ttyp ()->winsize.ws_row != ((struct winsize *) arg)->ws_row
|| get_ttyp ()->winsize.ws_col != ((struct winsize *) arg)->ws_col)
{
get_ttyp ()->winsize = *(struct winsize *) arg;
get_ttyp ()->kill_pgrp (SIGWINCH);
}
break;
case TIOCGPGRP:
*((pid_t *) arg) = this->tcgetpgrp ();
break;
case TIOCSPGRP:
return this->tcsetpgrp ((pid_t) (intptr_t) arg);
case FIONREAD:
{
DWORD n;
if (!bytes_available (n))
{
set_errno (EINVAL);
return -1;
}
*(int *) arg = (int) n;
}
break;
default:
return fhandler_base::ioctl (cmd, arg);
}
return 0;
}
int
fhandler_pty_master::ptsname_r (char *buf, size_t buflen)
{
char tmpbuf[TTY_NAME_MAX];
__ptsname (tmpbuf, get_minor ());
if (buflen <= strlen (tmpbuf))
{
set_errno (ERANGE);
return ERANGE;
}
strcpy (buf, tmpbuf);
return 0;
}
void
fhandler_pty_common::set_close_on_exec (bool val)
{
// Cygwin processes will handle this specially on exec.
close_on_exec (val);
}
/* This table is borrowed from mintty: charset.c */
static const struct {
UINT cp;
const char *name;
}
cs_names[] = {
{ CP_UTF8, "UTF-8"},
{ CP_UTF8, "UTF8"},
{ 20127, "ASCII"},
{ 20127, "US-ASCII"},
{ 20127, "ANSI_X3.4-1968"},
{ 20866, "KOI8-R"},
{ 20866, "KOI8R"},
{ 20866, "KOI8"},
{ 21866, "KOI8-U"},
{ 21866, "KOI8U"},
{ 20932, "EUCJP"},
{ 20932, "EUC-JP"},
{ 874, "TIS620"},
{ 874, "TIS-620"},
{ 932, "SJIS"},
{ 936, "GBK"},
{ 936, "GB2312"},
{ 936, "EUCCN"},
{ 936, "EUC-CN"},
{ 949, "EUCKR"},
{ 949, "EUC-KR"},
{ 950, "BIG5"},
{ 0, "NULL"}
};
static void
get_locale_from_env (char *locale)
{
const char *env = NULL;
char lang[ENCODING_LEN + 1] = {0, }, country[ENCODING_LEN + 1] = {0, };
env = getenv ("LC_ALL");
if (env == NULL || !*env)
env = getenv("LC_CTYPE");
if (env == NULL || !*env)
env = getenv("LANG");
if (env == NULL || !*env)
{
if (GetLocaleInfo (LOCALE_CUSTOM_UI_DEFAULT,
LOCALE_SISO639LANGNAME,
lang, sizeof (lang)))
GetLocaleInfo (LOCALE_CUSTOM_UI_DEFAULT,
LOCALE_SISO3166CTRYNAME,
country, sizeof (country));
else if (GetLocaleInfo (LOCALE_CUSTOM_DEFAULT,
LOCALE_SISO639LANGNAME,
lang, sizeof (lang)))
GetLocaleInfo (LOCALE_CUSTOM_DEFAULT,
LOCALE_SISO3166CTRYNAME,
country, sizeof (country));
else if (GetLocaleInfo (LOCALE_USER_DEFAULT,
LOCALE_SISO639LANGNAME,
lang, sizeof (lang)))
GetLocaleInfo (LOCALE_USER_DEFAULT,
LOCALE_SISO3166CTRYNAME,
country, sizeof (country));
else if (GetLocaleInfo (LOCALE_SYSTEM_DEFAULT,
LOCALE_SISO639LANGNAME,
lang, sizeof (lang)))
GetLocaleInfo (LOCALE_SYSTEM_DEFAULT,
LOCALE_SISO3166CTRYNAME,
country, sizeof (country));
if (strlen (lang) && strlen (country))
__small_sprintf (lang + strlen(lang), "_%s.UTF-8", country);
else
strcpy (lang , "C.UTF-8");
env = lang;
}
strcpy (locale, env);
}
#if USE_OWN_NLS_FUNC
static LCID
get_langinfo (char *locale_out, char *charset_out)
{
/* Get locale from environment */
char new_locale[ENCODING_LEN + 1];
get_locale_from_env (new_locale);
/* The following code is borrowed from __loadlocale() in
newlib/libc/locale/locale.c */
/* At this point a full-featured system would just load the locale
specific data from the locale files.
What we do here for now is to check the incoming string for correctness.
The string must be in one of the allowed locale strings, either
one in POSIX-style, or one in the old newlib style to maintain
backward compatibility. If the local string is correct, the charset
is extracted and stored in ctype_codeset or message_charset
dependent on the cateogry. */
char *locale = NULL;
char charset[ENCODING_LEN + 1];
long val = 0;
char *end, *c = NULL;
/* This additional code handles the case that the incoming locale string
is not valid. If so, it calls the function __set_locale_from_locale_alias,
which is only available on Cygwin right now. The function reads the
file /usr/share/locale/locale.alias. The file contains locale aliases
and their replacement locale. For instance, the alias "french" is
translated to "fr_FR.ISO-8859-1", the alias "thai" is translated to
"th_TH.TIS-620". If successful, the function returns with LCID
correspoding to the locale. */
char tmp_locale[ENCODING_LEN + 1];
restart:
if (!locale)
locale = new_locale;
else if (locale != tmp_locale)
{
locale = __set_locale_from_locale_alias (locale, tmp_locale);
if (!locale)
return 0;
}
# define FAIL goto restart
/* "POSIX" is translated to "C", as on Linux. */
if (!strcmp (locale, "POSIX"))
strcpy (locale, "C");
if (!strcmp (locale, "C")) /* Default "C" locale */
strcpy (charset, "ASCII");
else if (locale[0] == 'C'
&& (locale[1] == '-' /* Old newlib style */
|| locale[1] == '.')) /* Extension for the C locale to allow
specifying different charsets while
sticking to the C locale in terms
of sort order, etc. Proposed in
the Debian project. */
{
char *chp;
c = locale + 2;
strcpy (charset, c);
if ((chp = strchr (charset, '@')))
/* Strip off modifier */
*chp = '\0';
c += strlen (charset);
}
else /* POSIX style */
{
c = locale;
/* Don't use ctype macros here, they might be localized. */
/* Language */
if (c[0] < 'a' || c[0] > 'z'
|| c[1] < 'a' || c[1] > 'z')
FAIL;
c += 2;
/* Allow three character Language per ISO 639-3 */
if (c[0] >= 'a' && c[0] <= 'z')
++c;
if (c[0] == '_')
{
/* Territory */
++c;
if (c[0] < 'A' || c[0] > 'Z'
|| c[1] < 'A' || c[1] > 'Z')
FAIL;
c += 2;
}
if (c[0] == '.')
{
/* Charset */
char *chp;
++c;
strcpy (charset, c);
if ((chp = strchr (charset, '@')))
/* Strip off modifier */
*chp = '\0';
c += strlen (charset);
}
else if (c[0] == '\0' || c[0] == '@')
/* End of string or just a modifier */
/* The Cygwin-only function __set_charset_from_locale checks
for the default charset which is connected to the given locale.
The function uses Windows functions in turn so it can't be easily
adapted to other targets. However, if any other target provides
equivalent functionality, preferrably using the same function name
it would be sufficient to change the guarding #ifdef. */
__set_charset_from_locale (locale, charset);
else
/* Invalid string */
FAIL;
}
/* We only support this subset of charsets. */
switch (charset[0])
{
case 'U':
case 'u':
if (strcasecmp (charset, "UTF-8") && strcasecmp (charset, "UTF8"))
FAIL;
strcpy (charset, "UTF-8");
break;
case 'E':
case 'e':
if (strncasecmp (charset, "EUC", 3))
FAIL;
c = charset + 3;
if (*c == '-')
++c;
if (!strcasecmp (c, "JP"))
strcpy (charset, "EUCJP");
/* Newlib does neither provide EUC-KR nor EUC-CN, and Cygwin's
implementation requires Windows support. */
else if (!strcasecmp (c, "KR"))
strcpy (charset, "EUCKR");
else if (!strcasecmp (c, "CN"))
strcpy (charset, "EUCCN");
else
FAIL;
break;
case 'S':
case 's':
if (strcasecmp (charset, "SJIS"))
FAIL;
strcpy (charset, "SJIS");
break;
case 'I':
case 'i':
/* Must be exactly one of ISO-8859-1, [...] ISO-8859-16, except for
ISO-8859-12. This code also recognizes the aliases without dashes. */
if (strncasecmp (charset, "ISO", 3))
FAIL;
c = charset + 3;
if (*c == '-')
++c;
if (strncasecmp (c, "8859", 4))
FAIL;
c += 4;
if (*c == '-')
++c;
val = strtol (c, &end, 10);
if (val < 1 || val > 16 || val == 12 || *end)
FAIL;
strcpy (charset, "ISO-8859-");
c = charset + 9;
if (val > 10)
*c++ = '1';
*c++ = val % 10 + '0';
*c = '\0';
break;
case 'C':
case 'c':
if (charset[1] != 'P' && charset[1] != 'p')
FAIL;
strncpy (charset, "CP", 2);
val = strtol (charset + 2, &end, 10);
if (*end)
FAIL;
switch (val)
{
case 437:
case 720:
case 737:
case 775:
case 850:
case 852:
case 855:
case 857:
case 858:
case 862:
case 866:
case 874:
case 1125:
case 1250:
case 1251:
case 1252:
case 1253:
case 1254:
case 1255:
case 1256:
case 1257:
case 1258:
case 932:
break;
default:
FAIL;
}
break;
case 'K':
case 'k':
/* KOI8-R, KOI8-U and the aliases without dash */
if (strncasecmp (charset, "KOI8", 4))
FAIL;
c = charset + 4;
if (*c == '-')
++c;
if (*c == 'R' || *c == 'r')
{
val = 20866;
strcpy (charset, "CP20866");
}
else if (*c == 'U' || *c == 'u')
{
val = 21866;
strcpy (charset, "CP21866");
}
else
FAIL;
break;
case 'A':
case 'a':
if (strcasecmp (charset, "ASCII"))
FAIL;
strcpy (charset, "ASCII");
break;
case 'G':
case 'g':
/* Newlib does not provide GBK/GB2312 and Cygwin's implementation
requires Windows support. */
if (!strcasecmp (charset, "GBK")
|| !strcasecmp (charset, "GB2312"))
strcpy (charset, charset[2] == '2' ? "GB2312" : "GBK");
else
/* GEORGIAN-PS and the alias without dash */
if (!strncasecmp (charset, "GEORGIAN", 8))
{
c = charset + 8;
if (*c == '-')
++c;
if (strcasecmp (c, "PS"))
FAIL;
val = 101;
strcpy (charset, "CP101");
}
else
FAIL;
break;
case 'P':
case 'p':
/* PT154 */
if (strcasecmp (charset, "PT154"))
FAIL;
val = 102;
strcpy (charset, "CP102");
break;
case 'T':
case 't':
if (strncasecmp (charset, "TIS", 3))
FAIL;
c = charset + 3;
if (*c == '-')
++c;
if (strcasecmp (c, "620"))
FAIL;
val = 874;
strcpy (charset, "CP874");
break;
/* Newlib does not provide Big5 and Cygwin's implementation
requires Windows support. */
case 'B':
case 'b':
if (strcasecmp (charset, "BIG5"))
FAIL;
strcpy (charset, "BIG5");
break;
default:
FAIL;
}
/* The following code is borrowed from nl_langinfo()
in newlib/libc/locale/nl_langinfo.c */
/* Convert charset to Linux compatible codeset string. */
const char *ret = charset;
if (ret[0] == 'A'/*SCII*/)
ret = "ANSI_X3.4-1968";
else if (ret[0] == 'E')
{
if (strcmp (ret, "EUCJP") == 0)
ret = "EUC-JP";
else if (strcmp (ret, "EUCKR") == 0)
ret = "EUC-KR";
else if (strcmp (ret, "EUCCN") == 0)
ret = "GB2312";
}
else if (ret[0] == 'C'/*Pxxxx*/)
{
if (strcmp (ret + 2, "874") == 0)
ret = "TIS-620";
else if (strcmp (ret + 2, "20866") == 0)
ret = "KOI8-R";
else if (strcmp (ret + 2, "21866") == 0)
ret = "KOI8-U";
else if (strcmp (ret + 2, "101") == 0)
ret = "GEORGIAN-PS";
else if (strcmp (ret + 2, "102") == 0)
ret = "PT154";
}
else if (ret[0] == 'S'/*JIS*/)
{
/* Cygwin uses MSFT's implementation of SJIS, which differs
in some codepoints from the real thing, especially
0x5c: yen sign instead of backslash,
0x7e: overline instead of tilde.
We can't use the real SJIS since otherwise Win32
pathnames would become invalid. OTOH, if we return
"SJIS" here, then libiconv will do mb<->wc conversion
differently to our internal functions. Therefore we
return what we really implement, CP932. This is handled
fine by libiconv. */
ret = "CP932";
}
wchar_t lc[ENCODING_LEN + 1];
wchar_t *p;
mbstowcs (lc, locale, ENCODING_LEN);
p = wcschr (lc, L'.');
if (p)
*p = L'\0';
p = wcschr (lc, L'_');
if (p)
*p = L'-';
LCID lcid = LocaleNameToLCID (lc, 0);
if (!lcid && !strcmp (charset, "ASCII"))
return 0;
/* Set results */
strcpy(locale_out, new_locale);
strcpy(charset_out, ret);
return lcid;
}
#endif /* USE_OWN_NLS_FUNC */
void
fhandler_pty_slave::fixup_after_attach (bool native_maybe)
{
if (getPseudoConsole ())
{
if (fhandler_console::get_console_process_id (getHelperProcessId (),
true))
{
if (!pcon_attached[get_minor ()])
{
init_console_handler (true);
#if USE_OWN_NLS_FUNC
char locale[ENCODING_LEN + 1] = "C";
char charset[ENCODING_LEN + 1] = "ASCII";
LCID lcid = get_langinfo (locale, charset);
#else /* USE_OWN_NLS_FUNC */
char env[ENCODING_LEN + 1];
get_locale_from_env (env);
setlocale (LC_CTYPE, env);
const char *locale = setlocale (LC_CTYPE, NULL);
#if 0
char tmp_locale[ENCODING_LEN + 1];
char *ret = __set_locale_from_locale_alias (locale, tmp_locale);
if (ret)
locale = tmp_locale;
#endif
wchar_t lc[ENCODING_LEN + 1];
wchar_t *p;
mbstowcs (lc, locale, ENCODING_LEN);
p = wcschr (lc, L'.');
if (p)
*p = L'\0';
p = wcschr (lc, L'@');
if (p)
*p = L'\0';
p = wcschr (lc, L'_');
if (p)
*p = L'-';
LCID lcid = LocaleNameToLCID (lc, 0);
const char *charset = nl_langinfo (CODESET);
#endif /* USE_OWN_NLS_FUNC */
/* Set console code page form locale */
UINT CodePage;
if (lcid == 0 || lcid == (LCID) -1)
CodePage = 20127; /* ASCII */
else if (!GetLocaleInfo (lcid,
LOCALE_IDEFAULTANSICODEPAGE | LOCALE_RETURN_NUMBER,
(char *) &CodePage, sizeof (CodePage)))
CodePage = 20127; /* ASCII */
SetConsoleCP (CodePage);
SetConsoleOutputCP (CodePage);
if (get_ttyp ()->num_pcon_attached_slaves == 0)
{
/* Set terminal code page from locale */
/* This code is borrowed from mintty: charset.c */
char charset_u[ENCODING_LEN + 1] = {0, };
for (int i=0; charset[i] && i<ENCODING_LEN; i++)
charset_u[i] = toupper (charset[i]);
unsigned int iso;
UINT cp = 20127; /* Default for fallback */
if (sscanf (charset_u, "ISO-8859-%u", &iso) == 1 ||
sscanf (charset_u, "ISO8859-%u", &iso) == 1 ||
sscanf (charset_u, "ISO8859%u", &iso) == 1)
{
if (iso && iso <= 16 && iso !=12)
get_ttyp ()->TermCodePage = 28590 + iso;
}
else if (sscanf (charset_u, "CP%u", &cp) == 1)
get_ttyp ()->TermCodePage = cp;
else
for (int i=0; cs_names[i].cp; i++)
if (strcasecmp (charset_u, cs_names[i].name) == 0)
{
get_ttyp ()->TermCodePage = cs_names[i].cp;
break;
}
}
/* Clear screen to synchronize pseudo console screen buffer
with real terminal. This is necessary because pseudo
console screen buffer is empty at start. */
/* FIXME: Clearing sequence may not be "^[[H^[[J"
depending on the terminal type. */
DWORD n;
if (get_ttyp ()->num_pcon_attached_slaves == 0
&& !ALWAYS_USE_PCON)
/* Assume this is the first process using this pty slave. */
WriteFile (get_output_handle_cyg (),
"\033[H\033[J", 6, &n, NULL);
pcon_attached[get_minor ()] = true;
get_ttyp ()->num_pcon_attached_slaves ++;
}
}
else
pcon_attached[get_minor ()] = false;
}
if (pcon_attached[get_minor ()] && native_maybe)
{
FlushConsoleInputBuffer (get_handle ());
DWORD mode;
GetConsoleMode (get_handle (), &mode);
SetConsoleMode (get_handle (), mode | ENABLE_ECHO_INPUT);
Sleep (20);
if (get_ttyp ()->pcon_pid == 0 ||
kill (get_ttyp ()->pcon_pid, 0) != 0)
get_ttyp ()->pcon_pid = myself->pid;
get_ttyp ()->switch_to_pcon = true;
}
}
void
fhandler_pty_slave::fixup_after_fork (HANDLE parent)
{
fixup_after_attach (false);
// fork_fixup (parent, inuse, "inuse");
// fhandler_pty_common::fixup_after_fork (parent);
report_tty_counts (this, "inherited", "");
}
void
fhandler_pty_slave::fixup_after_exec ()
{
reset_switch_to_pcon ();
if (!close_on_exec ())
fixup_after_fork (NULL);
else if (getPseudoConsole ())
{
int used = 0;
cygheap_fdenum cfd (false);
while (cfd.next () >= 0)
if (cfd->get_major () == DEV_PTYS_MAJOR &&
cfd->get_minor () == get_minor ())
used ++;
/* Call FreeConsole() if no pty slave on this pty is
opened and the process is attached to the pseudo
console corresponding to this pty. This is needed
to make GNU screen and tmux work in Windows 10 1903. */
if (used == 1 /* About to close this one */ &&
fhandler_console::get_console_process_id (getHelperProcessId (),
true))
{
init_console_handler (false);
FreeConsole ();
pcon_attached[get_minor ()] = false;
}
}
#if USE_API_HOOK
/* Hook Console API */
if (getPseudoConsole ())
{
#define DO_HOOK(module, name) \
if (!name##_Orig) \
{ \
void *api = hook_api (module, #name, (void *) name##_Hooked); \
name##_Orig = (__typeof__ (name) *) api; \
if (!api) system_printf("Hooking " #name " failed."); \
}
DO_HOOK ("kernel32.dll", WriteFile);
DO_HOOK ("kernel32.dll", WriteConsoleA);
DO_HOOK ("kernel32.dll", WriteConsoleW);
DO_HOOK ("kernel32.dll", ReadFile);
DO_HOOK ("kernel32.dll", ReadConsoleA);
DO_HOOK ("kernel32.dll", ReadConsoleW);
DO_HOOK ("kernel32.dll", WriteConsoleOutputA);
DO_HOOK ("kernel32.dll", WriteConsoleOutputW);
DO_HOOK ("kernel32.dll", WriteConsoleOutputCharacterA);
DO_HOOK ("kernel32.dll", WriteConsoleOutputCharacterW);
DO_HOOK ("kernel32.dll", WriteConsoleOutputAttribute);
DO_HOOK ("kernel32.dll", WriteConsoleInputA);
DO_HOOK ("kernel32.dll", WriteConsoleInputW);
DO_HOOK ("kernel32.dll", ReadConsoleInputA);
DO_HOOK ("kernel32.dll", ReadConsoleInputW);
DO_HOOK ("kernel32.dll", PeekConsoleInputA);
DO_HOOK ("kernel32.dll", PeekConsoleInputW);
}
#endif /* USE_API_HOOK */
}
/* This thread function handles the master control pipe. It waits for a
client to connect. Then it checks if the client process has permissions
to access the tty handles. If so, it opens the client process and
duplicates the handles into that process. If that fails, it sends a reply
with at least one handle set to NULL and an error code. Last but not
least, the client is disconnected and the thread waits for the next client.
A special case is when the master side of the tty is about to be closed.
The client side is the fhandler_pty_master::close function and it sends
a PID -1 in that case. A check is performed that the request to leave
really comes from the master process itself.
Since there's always only one pipe instance, there's a chance that clients
have to wait to connect to the master control pipe. Therefore the client
calls to CallNamedPipe should have a big enough timeout value. For now this
is 500ms. Hope that's enough. */
DWORD
fhandler_pty_master::pty_master_thread ()
{
bool exit = false;
GENERIC_MAPPING map = { EVENT_QUERY_STATE, EVENT_MODIFY_STATE, 0,
EVENT_QUERY_STATE | EVENT_MODIFY_STATE };
pipe_request req;
DWORD len;
security_descriptor sd;
HANDLE token;
PRIVILEGE_SET ps;
DWORD pid;
NTSTATUS status;
termios_printf ("Entered");
while (!exit && (ConnectNamedPipe (master_ctl, NULL)
|| GetLastError () == ERROR_PIPE_CONNECTED))
{
pipe_reply repl = { NULL, NULL, NULL, 0 };
bool deimp = false;
NTSTATUS allow = STATUS_ACCESS_DENIED;
ACCESS_MASK access = EVENT_MODIFY_STATE;
HANDLE client = NULL;
if (!ReadFile (master_ctl, &req, sizeof req, &len, NULL))
{
termios_printf ("ReadFile, %E");
goto reply;
}
if (!GetNamedPipeClientProcessId (master_ctl, &pid))
pid = req.pid;
if (get_object_sd (input_available_event, sd))
{
termios_printf ("get_object_sd, %E");
goto reply;
}
cygheap->user.deimpersonate ();
deimp = true;
if (!ImpersonateNamedPipeClient (master_ctl))
{
termios_printf ("ImpersonateNamedPipeClient, %E");
goto reply;
}
status = NtOpenThreadToken (GetCurrentThread (), TOKEN_QUERY, TRUE,
&token);
if (!NT_SUCCESS (status))
{
termios_printf ("NtOpenThreadToken, %y", status);
SetLastError (RtlNtStatusToDosError (status));
goto reply;
}
len = sizeof ps;
status = NtAccessCheck (sd, token, access, &map, &ps, &len, &access,
&allow);
NtClose (token);
if (!NT_SUCCESS (status))
{
termios_printf ("NtAccessCheck, %y", status);
SetLastError (RtlNtStatusToDosError (status));
goto reply;
}
if (!RevertToSelf ())
{
termios_printf ("RevertToSelf, %E");
goto reply;
}
if (req.pid == (DWORD) -1) /* Request to finish thread. */
{
/* Check if the requesting process is the master process itself. */
if (pid == GetCurrentProcessId ())
exit = true;
goto reply;
}
if (NT_SUCCESS (allow))
{
client = OpenProcess (PROCESS_DUP_HANDLE, FALSE, pid);
if (!client)
{
termios_printf ("OpenProcess, %E");
goto reply;
}
if (!DuplicateHandle (GetCurrentProcess (), from_master,
client, &repl.from_master,
0, TRUE, DUPLICATE_SAME_ACCESS))
{
termios_printf ("DuplicateHandle (from_master), %E");
goto reply;
}
if (!DuplicateHandle (GetCurrentProcess (), from_master_cyg,
client, &repl.from_master_cyg,
0, TRUE, DUPLICATE_SAME_ACCESS))
{
termios_printf ("DuplicateHandle (from_master_cyg), %E");
goto reply;
}
if (!DuplicateHandle (GetCurrentProcess (), to_master,
client, &repl.to_master,
0, TRUE, DUPLICATE_SAME_ACCESS))
{
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 ();
if (client)
CloseHandle (client);
if (deimp)
cygheap->user.reimpersonate ();
sd.free ();
termios_printf ("Reply: from %p, to %p, error %u",
repl.from_master, repl.to_master, repl.error );
if (!WriteFile (master_ctl, &repl, sizeof repl, &len, NULL))
termios_printf ("WriteFile, %E");
if (!DisconnectNamedPipe (master_ctl))
termios_printf ("DisconnectNamedPipe, %E");
}
termios_printf ("Leaving");
return 0;
}
static DWORD WINAPI
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[65536];
termios_printf ("Started.");
for (;;)
{
if (!ReadFile (from_slave, outbuf, sizeof outbuf, &rlen, NULL))
{
termios_printf ("ReadFile for forwarding failed, %E");
break;
}
ssize_t wlen = rlen;
char *ptr = outbuf;
if (getPseudoConsole ())
{
/* Avoid duplicating slave output which is already sent to
to_master_cyg */
if (!check_switch_to_pcon ())
continue;
/* Avoid setting window title to "cygwin-console-helper.exe" */
int state = 0;
int start_at = 0;
for (DWORD i=0; i<rlen; i++)
if (outbuf[i] == '\033')
{
start_at = i;
state = 1;
continue;
}
else if ((state == 1 && outbuf[i] == ']') ||
(state == 2 && outbuf[i] == '0') ||
(state == 3 && outbuf[i] == ';') ||
(state == 4 && outbuf[i] == '\0'))
{
state ++;
continue;
}
else if (state == 5 && outbuf[i] == '\a')
{
memmove (&outbuf[start_at], &outbuf[i+1], rlen-i-1);
state = 0;
rlen = wlen = start_at + rlen - i - 1;
continue;
}
else if (state != 4 || outbuf[i] == '\a')
{
state = 0;
continue;
}
char *buf;
size_t nlen;
if (get_ttyp ()->TermCodePage != CP_UTF8)
{
size_t wlen2 =
MultiByteToWideChar (CP_UTF8, 0,
(char *)ptr, wlen, NULL, 0);
wchar_t *wbuf = (wchar_t *)
HeapAlloc (GetProcessHeap (), 0, wlen2 * sizeof (wchar_t));
wlen2 =
MultiByteToWideChar (CP_UTF8, 0,
(char *)ptr, wlen, wbuf, wlen2);
nlen = WideCharToMultiByte (get_ttyp ()->TermCodePage, 0,
wbuf, wlen2, NULL, 0, NULL, NULL);
buf = (char *) HeapAlloc (GetProcessHeap (), 0, nlen);
nlen = WideCharToMultiByte (get_ttyp ()->TermCodePage, 0,
wbuf, wlen2, buf, nlen, NULL, NULL);
HeapFree (GetProcessHeap (), 0, wbuf);
}
else
{
/* Just copy */
buf = (char *) HeapAlloc (GetProcessHeap (), 0, wlen);
memcpy (buf, (char *)ptr, wlen);
nlen = wlen;
}
ptr = buf;
wlen = rlen = nlen;
/* OPOST processing was already done in pseudo console,
so just write it to to_master_cyg. */
DWORD written;
acquire_output_mutex (INFINITE);
while (rlen>0)
{
if (!WriteFile (to_master_cyg, ptr, wlen, &written, NULL))
{
termios_printf ("WriteFile for forwarding failed, %E");
break;
}
ptr += written;
wlen = (rlen -= written);
}
release_output_mutex ();
HeapFree (GetProcessHeap (), 0, buf);
continue;
}
acquire_output_mutex (INFINITE);
while (rlen>0)
{
if (!process_opost_output (to_master_cyg, ptr, wlen, false))
{
termios_printf ("WriteFile for forwarding failed, %E");
break;
}
ptr += wlen;
wlen = (rlen -= wlen);
}
release_output_mutex ();
}
return 0;
}
static DWORD WINAPI
pty_master_fwd_thread (VOID *arg)
{
return ((fhandler_pty_master *) arg)->pty_master_fwd_thread ();
}
/* If master process is running as service, attaching to
pseudo console should be done in fork. If attaching
is done in spawn for inetd or sshd, it fails because
the helper process is running as privileged user while
slave process is not. This function is used to determine
if the process is running as a srvice or not. */
static bool
is_running_as_service (void)
{
DWORD dwSize = 0;
PTOKEN_GROUPS pGroupInfo;
tmp_pathbuf tp;
pGroupInfo = (PTOKEN_GROUPS) tp.w_get ();
NtQueryInformationToken (hProcToken, TokenGroups, pGroupInfo,
2 * NT_MAX_PATH, &dwSize);
for (DWORD i=0; i<pGroupInfo->GroupCount; i++)
if (RtlEqualSid (well_known_service_sid, pGroupInfo->Groups[i].Sid))
return true;
for (DWORD i=0; i<pGroupInfo->GroupCount; i++)
if (RtlEqualSid (well_known_interactive_sid, pGroupInfo->Groups[i].Sid))
return false;
return true;
}
bool
fhandler_pty_master::setup_pseudoconsole ()
{
/* Pseudo console supprot is realized using a tricky technic.
PTY need the pseudo console handles, however, they cannot
be retrieved by normal procedure. Therefore, run a helper
process in a pseudo console and get them from the helper.
Slave process will attach to the pseudo console in the
helper process using AttachConsole(). */
HMODULE hModule = GetModuleHandle ("kernel32.dll");
FARPROC func = GetProcAddress (hModule, "CreatePseudoConsole");
HRESULT (WINAPI *CreatePseudoConsole)
(COORD, HANDLE, HANDLE, DWORD, HPCON *) = NULL;
if (!func)
return false;
CreatePseudoConsole =
(HRESULT (WINAPI *) (COORD, HANDLE, HANDLE, DWORD, HPCON *)) func;
COORD size = {80, 25};
CreatePipe (&from_master, &to_slave, &sec_none, 0);
HRESULT res = CreatePseudoConsole (size, from_master, to_master,
0, &get_ttyp ()->hPseudoConsole);
if (res != S_OK)
{
system_printf ("CreatePseudoConsole() failed. %08x\n",
GetLastError());
CloseHandle (from_master);
CloseHandle (to_slave);
from_master = from_master_cyg;
to_slave = NULL;
get_ttyp ()->hPseudoConsole = NULL;
return false;
}
/* If master process is running as service, attaching to
pseudo console should be done in fork. If attaching
is done in spawn for inetd or sshd, it fails because
the helper process is running as privileged user while
slave process is not. */
if (is_running_as_service ())
get_ttyp ()->attach_pcon_in_fork = true;
SIZE_T bytesRequired;
InitializeProcThreadAttributeList (NULL, 1, 0, &bytesRequired);
STARTUPINFOEXW si_helper;
ZeroMemory (&si_helper, sizeof (si_helper));
si_helper.StartupInfo.cb = sizeof (STARTUPINFOEXW);
si_helper.lpAttributeList = (PPROC_THREAD_ATTRIBUTE_LIST)
HeapAlloc (GetProcessHeap (), 0, bytesRequired);
InitializeProcThreadAttributeList (si_helper.lpAttributeList,
1, 0, &bytesRequired);
UpdateProcThreadAttribute (si_helper.lpAttributeList,
0,
PROC_THREAD_ATTRIBUTE_PSEUDOCONSOLE,
get_ttyp ()->hPseudoConsole,
sizeof (get_ttyp ()->hPseudoConsole),
NULL, NULL);
HANDLE hello = CreateEvent (&sec_none, true, false, NULL);
HANDLE goodbye = CreateEvent (&sec_none, true, false, NULL);
/* Create a pipe for receiving pseudo console handles */
HANDLE hr, hw;
CreatePipe (&hr, &hw, &sec_none, 0);
/* Create helper process */
WCHAR cmd[MAX_PATH];
path_conv helper ("/bin/cygwin-console-helper.exe");
size_t len = helper.get_wide_win32_path_len ();
helper.get_wide_win32_path (cmd);
__small_swprintf (cmd + len, L" %p %p %p", hello, goodbye, hw);
si_helper.StartupInfo.dwFlags = STARTF_USESTDHANDLES;
si_helper.StartupInfo.hStdInput = NULL;
si_helper.StartupInfo.hStdOutput = NULL;
si_helper.StartupInfo.hStdError = NULL;
PROCESS_INFORMATION pi_helper;
CreateProcessW (NULL, cmd, &sec_none, &sec_none,
TRUE, EXTENDED_STARTUPINFO_PRESENT,
NULL, NULL, &si_helper.StartupInfo, &pi_helper);
WaitForSingleObject (hello, INFINITE);
/* Retrieve pseudo console handles */
DWORD rLen;
char buf[64];
ReadFile (hr, buf, sizeof (buf), &rLen, NULL);
buf[rLen] = '\0';
HANDLE hpConIn, hpConOut;
sscanf (buf, "StdHandles=%p,%p", &hpConIn, &hpConOut);
DuplicateHandle (pi_helper.hProcess, hpConIn,
GetCurrentProcess (), &hpConIn, 0,
TRUE, DUPLICATE_SAME_ACCESS);
DuplicateHandle (pi_helper.hProcess, hpConOut,
GetCurrentProcess (), &hpConOut, 0,
TRUE, DUPLICATE_SAME_ACCESS);
CloseHandle (hr);
CloseHandle (hw);
/* Clean up */
DeleteProcThreadAttributeList (si_helper.lpAttributeList);
HeapFree (GetProcessHeap (), 0, si_helper.lpAttributeList);
/* Setting information of stuffs regarding pseudo console */
get_ttyp ()->hHelperGoodbye = goodbye;
get_ttyp ()->hHelperProcess = pi_helper.hProcess;
get_ttyp ()->HelperProcessId = pi_helper.dwProcessId;
CloseHandle (from_master);
CloseHandle (to_master);
from_master = hpConIn;
to_master = hpConOut;
return true;
}
bool
fhandler_pty_master::setup ()
{
int res;
security_descriptor sd;
SECURITY_ATTRIBUTES sa = { sizeof (SECURITY_ATTRIBUTES), NULL, TRUE };
/* Find an unallocated pty to use. */
int unit = cygwin_shared->tty.allocate (from_master_cyg, get_output_handle ());
if (unit < 0)
return false;
/* from_master should be used for pseudo console.
Just copy from_master_cyg here for the case that
pseudo console is not available. */
from_master = from_master_cyg;
ProtectHandle1 (get_output_handle (), to_pty);
tty& t = *cygwin_shared->tty[unit];
_tc = (tty_min *) &t;
tcinit (true); /* Set termios information. Force initialization. */
const char *errstr = NULL;
DWORD pipe_mode = PIPE_NOWAIT;
if (!SetNamedPipeHandleState (get_output_handle (), &pipe_mode, NULL, NULL))
termios_printf ("can't set output_handle(%p) to non-blocking mode",
get_output_handle ());
char pipename[sizeof("ptyNNNN-to-master-cyg")];
__small_sprintf (pipename, "pty%d-to-master", unit);
res = fhandler_pipe::create (&sec_none, &from_slave, &to_master,
fhandler_pty_common::pipesize, pipename, 0);
if (res)
{
errstr = "output pipe";
goto err;
}
__small_sprintf (pipename, "pty%d-to-master-cyg", unit);
res = fhandler_pipe::create (&sec_none, &get_handle (), &to_master_cyg,
fhandler_pty_common::pipesize, pipename, 0);
if (res)
{
errstr = "output pipe for cygwin";
goto err;
}
ProtectHandle1 (from_slave, from_pty);
__small_sprintf (pipename, "pty%d-echoloop", unit);
res = fhandler_pipe::create (&sec_none, &echo_r, &echo_w,
fhandler_pty_common::pipesize, pipename, 0);
if (res)
{
errstr = "echo pipe";
goto err;
}
/* Create security attribute. Default permissions are 0620. */
sd.malloc (sizeof (SECURITY_DESCRIPTOR));
RtlCreateSecurityDescriptor (sd, SECURITY_DESCRIPTOR_REVISION);
if (!create_object_sd_from_attribute (myself->uid, myself->gid,
S_IFCHR | S_IRUSR | S_IWUSR | S_IWGRP,
sd))
sa.lpSecurityDescriptor = (PSECURITY_DESCRIPTOR) sd;
/* Carefully check that the input_available_event didn't already exist.
This is a measure to make sure that the event security descriptor
isn't occupied by a malicious process. We must make sure that the
event's security descriptor is what we expect it to be. */
if (!(input_available_event = t.get_event (errstr = INPUT_AVAILABLE_EVENT,
&sa, TRUE))
|| GetLastError () == ERROR_ALREADY_EXISTS)
goto err;
char buf[MAX_PATH];
errstr = shared_name (buf, OUTPUT_MUTEX, unit);
if (!(output_mutex = CreateMutex (&sa, FALSE, buf)))
goto err;
errstr = shared_name (buf, INPUT_MUTEX, unit);
if (!(input_mutex = CreateMutex (&sa, FALSE, buf)))
goto err;
/* Create master control pipe which allows the master to duplicate
the pty pipe handles to processes which deserve it. */
__small_sprintf (buf, "\\\\.\\pipe\\cygwin-%S-pty%d-master-ctl",
&cygheap->installation_key, unit);
master_ctl = CreateNamedPipe (buf, PIPE_ACCESS_DUPLEX
| FILE_FLAG_FIRST_PIPE_INSTANCE,
PIPE_WAIT | PIPE_TYPE_MESSAGE
| PIPE_READMODE_MESSAGE
| PIPE_REJECT_REMOTE_CLIENTS,
1, 4096, 4096, 0, &sec_all_nih);
if (master_ctl == INVALID_HANDLE_VALUE)
{
errstr = "pty master control pipe";
goto err;
}
master_thread = new cygthread (::pty_master_thread, this, "ptym");
if (!master_thread)
{
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;
}
setup_pseudoconsole ();
t.set_from_master (from_master);
t.set_from_master_cyg (from_master_cyg);
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,%p>, to_pty %p",
this, unit, from_slave, get_handle (),
get_output_handle ());
return true;
err:
__seterrno ();
close_maybe (from_slave);
close_maybe (get_handle ());
close_maybe (get_output_handle ());
close_maybe (input_available_event);
close_maybe (output_mutex);
close_maybe (input_mutex);
close_maybe (from_master);
close_maybe (from_master_cyg);
close_maybe (to_master);
close_maybe (to_master_cyg);
close_maybe (echo_r);
close_maybe (echo_w);
close_maybe (master_ctl);
termios_printf ("pty%d open failed - failed to create %s", unit, errstr);
return false;
}
void
fhandler_pty_master::fixup_after_fork (HANDLE parent)
{
DWORD wpid = GetCurrentProcessId ();
fhandler_pty_master *arch = (fhandler_pty_master *) archetype;
if (arch->dwProcessId != wpid)
{
tty& t = *get_ttyp ();
if (myself->pid == t.master_pid)
{
t.set_from_master (arch->from_master);
t.set_from_master_cyg (arch->from_master_cyg);
t.set_to_master (arch->to_master);
t.set_to_master_cyg (arch->to_master_cyg);
}
arch->dwProcessId = wpid;
}
from_master = arch->from_master;
from_master_cyg = arch->from_master_cyg;
to_master = arch->to_master;
to_master_cyg = arch->to_master_cyg;
#if 0 /* Not sure if this is necessary. */
from_slave = arch->from_slave;
to_slave = arch->to_slave;
#endif
report_tty_counts (this, "inherited master", "");
}
void
fhandler_pty_master::fixup_after_exec ()
{
if (!close_on_exec ())
fixup_after_fork (spawn_info->parent);
else
from_master = from_master_cyg = to_master = to_master_cyg =
from_slave = to_slave = NULL;
}
BOOL
fhandler_pty_common::process_opost_output (HANDLE h, const void *ptr, ssize_t& len, bool is_echo)
{
ssize_t towrite = len;
BOOL res = TRUE;
BOOL (WINAPI *WriteFunc)
(HANDLE, LPCVOID, DWORD, LPDWORD, LPOVERLAPPED);
WriteFunc = WriteFile_Orig ? WriteFile_Orig : WriteFile;
while (towrite)
{
if (!is_echo)
{
if (tc ()->output_stopped && is_nonblocking ())
{
if (towrite < len)
break;
else
{
set_errno(EAGAIN);
len = -1;
return TRUE;
}
}
while (tc ()->output_stopped)
cygwait (10);
}
if (!(get_ttyp ()->ti.c_oflag & OPOST)) // raw output mode
{
DWORD n = MIN (OUT_BUFFER_SIZE, towrite);
res = WriteFunc (h, ptr, n, &n, NULL);
if (!res)
break;
ptr = (char *) ptr + n;
towrite -= n;
}
else // post-process output
{
char outbuf[OUT_BUFFER_SIZE + 1];
char *buf = (char *)ptr;
DWORD n = 0;
ssize_t rc = 0;
while (n < OUT_BUFFER_SIZE && rc < towrite)
{
switch (buf[rc])
{
case '\r':
if ((get_ttyp ()->ti.c_oflag & ONOCR)
&& get_ttyp ()->column == 0)
{
rc++;
continue;
}
if (get_ttyp ()->ti.c_oflag & OCRNL)
{
outbuf[n++] = '\n';
rc++;
}
else
{
outbuf[n++] = buf[rc++];
get_ttyp ()->column = 0;
}
break;
case '\n':
if (get_ttyp ()->ti.c_oflag & ONLCR)
{
outbuf[n++] = '\r';
get_ttyp ()->column = 0;
}
if (get_ttyp ()->ti.c_oflag & ONLRET)
get_ttyp ()->column = 0;
outbuf[n++] = buf[rc++];
break;
default:
outbuf[n++] = buf[rc++];
get_ttyp ()->column++;
break;
}
}
res = WriteFunc (h, outbuf, n, &n, NULL);
if (!res)
break;
ptr = (char *) ptr + rc;
towrite -= rc;
}
}
len -= towrite;
return res;
}
Reference in New Issue View Git Blame Copy Permalink