468 lines
10 KiB
C++
468 lines
10 KiB
C++
/* tty.cc
|
|
|
|
Copyright 1997, 1998, 2000, 2001, 2002 Red Hat, Inc.
|
|
|
|
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 <unistd.h>
|
|
#include <utmp.h>
|
|
#include <wingdi.h>
|
|
#include <winuser.h>
|
|
#include <sys/cygwin.h>
|
|
#include "cygerrno.h"
|
|
#include "security.h"
|
|
#include "path.h"
|
|
#include "fhandler.h"
|
|
#include "dtable.h"
|
|
#include "cygheap.h"
|
|
#include "pinfo.h"
|
|
#include "cygserver.h"
|
|
#include "shared_info.h"
|
|
#include "cygthread.h"
|
|
|
|
extern fhandler_tty_master *tty_master;
|
|
|
|
extern "C" int
|
|
grantpt (int fd)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
extern "C" int
|
|
unlockpt (int fd)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
extern "C" int
|
|
revoke (char *ttyname)
|
|
{
|
|
set_errno (ENOSYS);
|
|
return -1;
|
|
}
|
|
|
|
extern "C" int
|
|
ttyslot (void)
|
|
{
|
|
if (NOTSTATE (myself, PID_USETTY))
|
|
return -1;
|
|
return myself->ctty;
|
|
}
|
|
|
|
void __stdcall
|
|
tty_init (void)
|
|
{
|
|
if (!myself->ppid_handle && NOTSTATE (myself, PID_CYGPARENT))
|
|
cygheap->fdtab.get_debugger_info ();
|
|
|
|
if (NOTSTATE (myself, PID_USETTY))
|
|
return;
|
|
if (myself->ctty == -1)
|
|
if (NOTSTATE (myself, PID_CYGPARENT))
|
|
myself->ctty = attach_tty (myself->ctty);
|
|
else
|
|
return;
|
|
if (myself->ctty == -1)
|
|
termios_printf ("Can't attach to tty");
|
|
}
|
|
|
|
/* Create session's master tty */
|
|
|
|
void __stdcall
|
|
create_tty_master (int ttynum)
|
|
{
|
|
device ttym = *ttym_dev;
|
|
ttym.setunit (ttynum); /* CGF FIXME device */
|
|
tty_master = (fhandler_tty_master *) build_fh_dev (ttym);
|
|
if (tty_master->init ())
|
|
api_fatal ("Can't create master tty");
|
|
else
|
|
{
|
|
/* Log utmp entry */
|
|
struct utmp our_utmp;
|
|
DWORD len = sizeof our_utmp.ut_host;
|
|
|
|
bzero ((char *) &our_utmp, sizeof (utmp));
|
|
(void) time (&our_utmp.ut_time);
|
|
strncpy (our_utmp.ut_name, getlogin (), sizeof (our_utmp.ut_name));
|
|
GetComputerName (our_utmp.ut_host, &len);
|
|
__small_sprintf (our_utmp.ut_line, "tty%d", ttynum);
|
|
if ((len = strlen (our_utmp.ut_line)) >= UT_IDLEN)
|
|
len -= UT_IDLEN;
|
|
else
|
|
len = 0;
|
|
strncpy (our_utmp.ut_id, our_utmp.ut_line + len, UT_IDLEN);
|
|
our_utmp.ut_type = USER_PROCESS;
|
|
our_utmp.ut_pid = myself->pid;
|
|
myself->ctty = ttynum;
|
|
login (&our_utmp);
|
|
}
|
|
}
|
|
|
|
void __stdcall
|
|
tty_terminate (void)
|
|
{
|
|
if (NOTSTATE (myself, PID_USETTY))
|
|
return;
|
|
cygwin_shared->tty.terminate ();
|
|
}
|
|
|
|
int __stdcall
|
|
attach_tty (int num)
|
|
{
|
|
if (num != -1)
|
|
{
|
|
return cygwin_shared->tty.connect_tty (num);
|
|
}
|
|
if (NOTSTATE (myself, PID_USETTY))
|
|
return -1;
|
|
return cygwin_shared->tty.allocate_tty (1);
|
|
}
|
|
|
|
void
|
|
tty_list::terminate (void)
|
|
{
|
|
int ttynum = myself->ctty;
|
|
|
|
/* Keep master running till there are connected clients */
|
|
if (ttynum != -1 && ttys[ttynum].master_pid == GetCurrentProcessId ())
|
|
{
|
|
tty *t = ttys + ttynum;
|
|
CloseHandle (t->from_master);
|
|
CloseHandle (t->to_master);
|
|
/* Wait for children which rely on tty handling in this process to
|
|
go away */
|
|
for (int i = 0; ; i++)
|
|
{
|
|
if (!t->slave_alive ())
|
|
break;
|
|
if (i >= 100)
|
|
{
|
|
small_printf ("waiting for children using tty%d to terminate\n",
|
|
ttynum);
|
|
i = 0;
|
|
}
|
|
|
|
low_priority_sleep (200);
|
|
}
|
|
|
|
termios_printf ("tty %d master about to finish", ttynum);
|
|
ForceCloseHandle1 (t->to_slave, to_pty);
|
|
ForceCloseHandle1 (t->from_slave, from_pty);
|
|
CloseHandle (tty_master->inuse);
|
|
t->init ();
|
|
|
|
char buf[20];
|
|
__small_sprintf (buf, "tty%d", ttynum);
|
|
logout (buf);
|
|
}
|
|
}
|
|
|
|
int
|
|
tty_list::connect_tty (int ttynum)
|
|
{
|
|
if (ttynum < 0 || ttynum >= NTTYS)
|
|
{
|
|
termios_printf ("ttynum (%d) out of range", ttynum);
|
|
return -1;
|
|
}
|
|
if (!ttys[ttynum].exists ())
|
|
{
|
|
termios_printf ("tty %d was not allocated", ttynum);
|
|
return -1;
|
|
}
|
|
|
|
return ttynum;
|
|
}
|
|
|
|
void
|
|
tty_list::init (void)
|
|
{
|
|
for (int i = 0; i < NTTYS; i++)
|
|
{
|
|
ttys[i].init ();
|
|
ttys[i].setntty (i);
|
|
}
|
|
}
|
|
|
|
/* Search for tty class for our console. Allocate new tty if our process is
|
|
the only cygwin process in the current console.
|
|
Return tty number or -1 if error.
|
|
If flag == 0, just find a free tty.
|
|
*/
|
|
int
|
|
tty_list::allocate_tty (int with_console)
|
|
{
|
|
HWND console;
|
|
|
|
/* FIXME: This whole function needs a protective mutex. */
|
|
|
|
if (!with_console)
|
|
console = NULL;
|
|
else if (!(console = GetConsoleWindow ()))
|
|
{
|
|
char *oldtitle = new char [TITLESIZE];
|
|
|
|
if (!oldtitle)
|
|
{
|
|
termios_printf ("Can't *allocate console title buffer");
|
|
return -1;
|
|
}
|
|
if (!GetConsoleTitle (oldtitle, TITLESIZE))
|
|
{
|
|
termios_printf ("Can't read console title");
|
|
return -1;
|
|
}
|
|
|
|
if (WaitForSingleObject (title_mutex, INFINITE) == WAIT_FAILED)
|
|
termios_printf ("WFSO for title_mutext %p failed, %E", title_mutex);
|
|
|
|
char buf[40];
|
|
|
|
__small_sprintf (buf, "cygwin.find.console.%d", myself->pid);
|
|
SetConsoleTitle (buf);
|
|
for (int times = 0; times < 25; times++)
|
|
{
|
|
Sleep (10);
|
|
if ((console = FindWindow (NULL, buf)))
|
|
break;
|
|
}
|
|
SetConsoleTitle (oldtitle);
|
|
Sleep (40);
|
|
ReleaseMutex (title_mutex);
|
|
if (console == NULL)
|
|
{
|
|
termios_printf ("Can't find console window");
|
|
return -1;
|
|
}
|
|
}
|
|
/* Is a tty allocated for console? */
|
|
|
|
int freetty = -1;
|
|
for (int i = 0; i < NTTYS; i++)
|
|
{
|
|
if (!ttys[i].exists ())
|
|
{
|
|
if (freetty < 0) /* Scanning? */
|
|
freetty = i; /* Yes. */
|
|
if (!with_console) /* Do we want to attach this to a console? */
|
|
break; /* No. We've got one. */
|
|
}
|
|
|
|
if (with_console && ttys[i].gethwnd () == console)
|
|
{
|
|
termios_printf ("console %x already associated with tty%d",
|
|
console, i);
|
|
/* Is the master alive? */
|
|
HANDLE hMaster;
|
|
hMaster = OpenProcess (PROCESS_DUP_HANDLE, FALSE, ttys[i].master_pid);
|
|
if (hMaster)
|
|
{
|
|
CloseHandle (hMaster);
|
|
return i;
|
|
}
|
|
/* Master is dead */
|
|
freetty = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* There is no tty allocated to console, allocate the first free found */
|
|
if (freetty == -1)
|
|
{
|
|
system_printf ("No free ttys available");
|
|
return -1;
|
|
}
|
|
tty *t = ttys + freetty;
|
|
t->init ();
|
|
t->setsid (-1);
|
|
t->setpgid (myself->pgid);
|
|
t->sethwnd (console);
|
|
|
|
if (with_console)
|
|
{
|
|
termios_printf ("console %x associated with tty%d", console, freetty);
|
|
create_tty_master (freetty);
|
|
}
|
|
else
|
|
termios_printf ("tty%d allocated", freetty);
|
|
return freetty;
|
|
}
|
|
|
|
bool
|
|
tty::slave_alive ()
|
|
{
|
|
return alive (TTY_SLAVE_ALIVE);
|
|
}
|
|
|
|
bool
|
|
tty::master_alive ()
|
|
{
|
|
return alive (TTY_MASTER_ALIVE);
|
|
}
|
|
|
|
bool
|
|
tty::alive (const char *fmt)
|
|
{
|
|
HANDLE ev;
|
|
char buf[sizeof (TTY_MASTER_ALIVE) + 16];
|
|
|
|
__small_sprintf (buf, fmt, ntty);
|
|
if ((ev = OpenEvent (EVENT_ALL_ACCESS, FALSE, buf)))
|
|
CloseHandle (ev);
|
|
return ev != NULL;
|
|
}
|
|
|
|
HANDLE
|
|
tty::create_inuse (const char *fmt)
|
|
{
|
|
HANDLE h;
|
|
char buf[sizeof (TTY_MASTER_ALIVE) + 16];
|
|
|
|
__small_sprintf (buf, fmt, ntty);
|
|
h = CreateEvent (&sec_all, TRUE, FALSE, buf);
|
|
termios_printf ("%s = %p", buf, h);
|
|
if (!h)
|
|
termios_printf ("couldn't open inuse event, %E", buf);
|
|
return h;
|
|
}
|
|
|
|
void
|
|
tty::init (void)
|
|
{
|
|
output_stopped = 0;
|
|
setsid (0);
|
|
pgid = 0;
|
|
hwnd = NULL;
|
|
to_slave = NULL;
|
|
from_slave = NULL;
|
|
was_opened = 0;
|
|
}
|
|
|
|
HANDLE
|
|
tty::get_event (const char *fmt, BOOL manual_reset)
|
|
{
|
|
HANDLE hev;
|
|
char buf[40];
|
|
|
|
__small_sprintf (buf, fmt, ntty);
|
|
if (!(hev = CreateEvent (&sec_all, manual_reset, FALSE, buf)))
|
|
{
|
|
termios_printf ("couldn't create %s", buf);
|
|
set_errno (ENOENT); /* FIXME this can't be the right errno */
|
|
return NULL;
|
|
}
|
|
|
|
termios_printf ("created event %s", buf);
|
|
return hev;
|
|
}
|
|
|
|
bool
|
|
tty::make_pipes (fhandler_pty_master *ptym)
|
|
{
|
|
/* Create communication pipes */
|
|
|
|
/* FIXME: should this be sec_none_nih? */
|
|
if (!CreatePipe (&from_master, &to_slave, &sec_all, 128 * 1024))
|
|
{
|
|
termios_printf ("can't create input pipe");
|
|
set_errno (ENOENT);
|
|
return false;
|
|
}
|
|
|
|
// ProtectHandle1INH (to_slave, to_pty);
|
|
if (!CreatePipe (&from_slave, &to_master, &sec_all, 128 * 1024))
|
|
{
|
|
termios_printf ("can't create output pipe");
|
|
set_errno (ENOENT);
|
|
return false;
|
|
}
|
|
// ProtectHandle1INH (from_slave, from_pty);
|
|
termios_printf ("tty%d from_slave %p, to_slave %p", ntty, from_slave,
|
|
to_slave);
|
|
|
|
DWORD pipe_mode = PIPE_NOWAIT;
|
|
if (!SetNamedPipeHandleState (to_slave, &pipe_mode, NULL, NULL))
|
|
termios_printf ("can't set to_slave to non-blocking mode");
|
|
ptym->set_io_handle (from_slave);
|
|
ptym->set_output_handle (to_slave);
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
tty::common_init (fhandler_pty_master *ptym)
|
|
{
|
|
/* Set termios information. Force initialization. */
|
|
ptym->tcinit (this, true);
|
|
|
|
if (!make_pipes (ptym))
|
|
return false;
|
|
ptym->need_nl = 0;
|
|
|
|
/* Save our pid */
|
|
|
|
master_pid = GetCurrentProcessId ();
|
|
|
|
/* We do not open allow the others to open us (for handle duplication)
|
|
but rely on cygheap->inherited_ctty for descendant processes.
|
|
In the future the cygserver may allow access by others. */
|
|
|
|
#ifdef USE_SERVER
|
|
if (wincap.has_security ())
|
|
{
|
|
if (cygserver_running == CYGSERVER_UNKNOWN)
|
|
cygserver_init ();
|
|
}
|
|
#endif
|
|
|
|
/* Create synchronisation events */
|
|
|
|
if (ptym->get_major () != DEV_TTYM_MAJOR)
|
|
{
|
|
ptym->output_done_event = ptym->ioctl_done_event =
|
|
ptym->ioctl_request_event = NULL;
|
|
}
|
|
else
|
|
{
|
|
if (!(ptym->output_done_event = get_event (OUTPUT_DONE_EVENT)))
|
|
return false;
|
|
if (!(ptym->ioctl_done_event = get_event (IOCTL_DONE_EVENT)))
|
|
return false;
|
|
if (!(ptym->ioctl_request_event = get_event (IOCTL_REQUEST_EVENT)))
|
|
return false;
|
|
}
|
|
|
|
if (!(ptym->input_available_event = get_event (INPUT_AVAILABLE_EVENT, TRUE)))
|
|
return false;
|
|
|
|
char buf[40];
|
|
__small_sprintf (buf, OUTPUT_MUTEX, ntty);
|
|
if (!(ptym->output_mutex = CreateMutex (&sec_all, FALSE, buf)))
|
|
{
|
|
termios_printf ("can't create %s", buf);
|
|
set_errno (ENOENT);
|
|
return false;
|
|
}
|
|
|
|
__small_sprintf (buf, INPUT_MUTEX, ntty);
|
|
if (!(ptym->input_mutex = CreateMutex (&sec_all, FALSE, buf)))
|
|
{
|
|
termios_printf ("can't create %s", buf);
|
|
set_errno (ENOENT);
|
|
return false;
|
|
}
|
|
|
|
// /* screws up tty master */ ProtectHandle1INH (ptym->output_mutex, output_mutex);
|
|
// /* screws up tty master */ ProtectHandle1INH (ptym->input_mutex, input_mutex);
|
|
winsize.ws_col = 80;
|
|
winsize.ws_row = 25;
|
|
|
|
termios_printf ("tty%d opened", ntty);
|
|
return true;
|
|
}
|