diff options
Diffstat (limited to 'winsup/cygwin/tty.cc')
-rw-r--r-- | winsup/cygwin/tty.cc | 385 |
1 files changed, 0 insertions, 385 deletions
diff --git a/winsup/cygwin/tty.cc b/winsup/cygwin/tty.cc deleted file mode 100644 index 6341eb11c..000000000 --- a/winsup/cygwin/tty.cc +++ /dev/null @@ -1,385 +0,0 @@ -/* tty.cc - - Copyright 1997, 1998, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2008 - 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 "miscfuncs.h" -#include <unistd.h> -#include <utmp.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 "shared_info.h" - -extern fhandler_tty_master *tty_master; - -extern "C" int -posix_openpt (int oflags) -{ - return open ("/dev/ptmx", oflags); -} - -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; -} - -HANDLE NO_COPY tty_list::mutex = NULL; - -void __stdcall -tty_list::init_session () -{ - char mutex_name[MAX_PATH]; - /* tty_list::mutex is used while searching for a tty slot. It's necessary - while finding console window handle */ - - char *name = shared_name (mutex_name, "tty_list::mutex", 0); - if (!(mutex = CreateMutex (&sec_all_nih, FALSE, name))) - api_fatal ("can't create tty_list::mutex '%s', %E", name); - ProtectHandle (mutex); -} - -void __stdcall -tty::init_session () -{ - if (!myself->cygstarted && NOTSTATE (myself, PID_CYGPARENT)) - cygheap->fdtab.get_debugger_info (); - - if (NOTSTATE (myself, PID_USETTY)) - return; - if (myself->ctty != -1) - /* nothing to do */; - else if (NOTSTATE (myself, PID_CYGPARENT)) - myself->ctty = cygwin_shared->tty.attach (myself->ctty); - else - return; - if (myself->ctty == -1) - termios_printf ("Can't attach to tty"); -} - -/* Create session's master tty */ - -void __stdcall -tty::create_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)); - 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); - } -} - -int __stdcall -tty_list::attach (int num) -{ - if (num != -1) - { - return connect (num); - } - if (NOTSTATE (myself, PID_USETTY)) - return -1; - return allocate (true); -} - -void -tty_list::terminate () -{ - if (NOTSTATE (myself, PID_USETTY)) - return; - int ttynum = myself->ctty; - - /* Keep master running till there are connected clients */ - if (ttynum != -1 && tty_master && ttys[ttynum].master_pid == myself->pid) - { - tty *t = ttys + ttynum; - CloseHandle (tty_master->from_master); - CloseHandle (tty_master->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); - } - - lock_ttys here (); - - termios_printf ("tty %d master about to finish", ttynum); - CloseHandle (tty_master->get_io_handle ()); - CloseHandle (tty_master->get_output_handle ()); - - t->init (); - - char buf[20]; - __small_sprintf (buf, "tty%d", ttynum); - logout (buf); - } -} - -int -tty_list::connect (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 () -{ - 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 (bool with_console) -{ - HWND console; - int freetty = -1; - HANDLE hmaster = NULL; - - /* FIXME: This whole function needs a protective mutex. */ - - lock_ttys here; - - if (!with_console) - console = NULL; - else if (!(console = GetConsoleWindow ())) - { - termios_printf ("Can't find console window"); - goto out; - } - - /* Is a tty allocated for console? */ - 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. */ - } - - /* FIXME: Is this right? We can potentially query a "nonexistent" - tty slot after falling through from the above? */ - if (with_console && ttys[i].gethwnd () == console) - { - termios_printf ("console %x already associated with tty%d", - console, i); - /* Is the master alive? */ - hmaster = OpenProcess (PROCESS_DUP_HANDLE, FALSE, ttys[i].master_pid); - if (hmaster) - { - CloseHandle (hmaster); - freetty = i; - goto out; - } - /* Master is dead */ - freetty = i; - break; - } - } - - /* There is no tty allocated to console, allocate the first free found */ - if (freetty == -1) - goto out; - - tty *t; - t = ttys + freetty; - t->init (); - t->setsid (-1); - t->sethwnd (console); - -out: - if (freetty < 0) - system_printf ("No tty allocated"); - else if (!with_console) - { - termios_printf ("tty%d allocated", freetty); - here.dont_release (); /* exit with mutex still held -- caller has more work to do */ - } - else - { - termios_printf ("console %p associated with tty%d", console, freetty); - if (!hmaster) - tty::create_master (freetty); - } - return freetty; -} - -bool -tty::slave_alive () -{ - return alive (TTY_SLAVE_ALIVE); -} - -bool -tty::alive (const char *fmt) -{ - HANDLE ev; - char buf[MAX_PATH]; - - shared_name (buf, fmt, ntty); - if ((ev = OpenEvent (EVENT_ALL_ACCESS, FALSE, buf))) - CloseHandle (ev); - return ev != NULL; -} - -HANDLE -tty::open_output_mutex () -{ - return open_mutex (OUTPUT_MUTEX); -} - -HANDLE -tty::open_input_mutex () -{ - return open_mutex (INPUT_MUTEX); -} - -HANDLE -tty::open_mutex (const char *mutex) -{ - char buf[MAX_PATH]; - shared_name (buf, mutex, ntty); - return OpenMutex (MUTEX_ALL_ACCESS, TRUE, buf); -} - -HANDLE -tty::create_inuse (const char *fmt) -{ - HANDLE h; - char buf[MAX_PATH]; - - shared_name (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 () -{ - output_stopped = 0; - setsid (0); - pgid = 0; - hwnd = NULL; - was_opened = 0; - master_pid = 0; -} - -HANDLE -tty::get_event (const char *fmt, BOOL manual_reset) -{ - HANDLE hev; - char buf[MAX_PATH]; - - shared_name (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; -} - -lock_ttys::lock_ttys (DWORD howlong): release_me (true) -{ - if (WaitForSingleObject (tty_list::mutex, howlong) == WAIT_FAILED) - { - termios_printf ("WFSO for mutex %p failed, %E", tty_list::mutex); - release_me = false; - } -} - -void -lock_ttys::release () -{ - ReleaseMutex (tty_list::mutex); -} |