148 lines
3.6 KiB
C++
148 lines
3.6 KiB
C++
/* tty.h: shared tty info for cygwin
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Copyright 2000, 2001, 2002, 2003, 2004, 2006, 2009, 2010, 2011 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef _TTY_H
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#define _TTY_H
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/* tty tables */
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#define INP_BUFFER_SIZE 256
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#define OUT_BUFFER_SIZE 256
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#define NTTYS 128
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#define real_tty_attached(p) ((p)->ctty >= 0 && !iscons_dev ((p)->ctty))
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/* Input/Output/ioctl events */
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#define RESTART_OUTPUT_EVENT "cygtty.output.restart"
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#define INPUT_AVAILABLE_EVENT "cygtty.input.avail"
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#define OUTPUT_MUTEX "cygtty.output.mutex"
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#define INPUT_MUTEX "cygtty.input.mutex"
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#define TTY_SLAVE_ALIVE "cygtty.slave_alive"
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#define TTY_MASTER_ALIVE "cygtty.master_alive"
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#include <sys/termios.h>
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#ifndef MIN_CTRL_C_SLOP
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#define MIN_CTRL_C_SLOP 50
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#endif
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#include <devices.h>
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class tty_min
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{
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pid_t sid; /* Session ID of tty */
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struct status_flags
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{
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unsigned initialized : 1; /* Set if tty is initialized */
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unsigned rstcons : 1; /* Set if console needs to be set to "non-cooked" */
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} status;
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public:
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pid_t pgid;
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int output_stopped;
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fh_devices ntty;
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DWORD last_ctrl_c; /* tick count of last ctrl-c */
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bool is_console;
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IMPLEMENT_STATUS_FLAG (bool, initialized)
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IMPLEMENT_STATUS_FLAG (bool, rstcons)
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struct termios ti;
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struct winsize winsize;
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/* ioctl requests buffer */
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int cmd;
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union
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{
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struct termios termios;
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struct winsize winsize;
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int value;
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pid_t pid;
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} arg;
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/* XXX_retval variables holds master's completion codes. Error are stored as
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* -ERRNO
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*/
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int ioctl_retval;
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int write_error;
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void setntty (_major_t t, int n) {ntty = (fh_devices) FHDEV (t, n);}
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int getntty () const {return ntty;}
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int get_unit () const {return device::minor (ntty);}
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pid_t getpgid () const {return pgid;}
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void setpgid (int pid) {pgid = pid;}
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int getsid () const {return sid;}
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void setsid (pid_t tsid) {sid = tsid;}
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void kill_pgrp (int);
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int is_orphaned_process_group (int);
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const char *ttyname () __attribute ((regparm (1)));
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};
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class fhandler_pty_master;
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class tty: public tty_min
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{
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HANDLE get_event (const char *fmt, PSECURITY_ATTRIBUTES sa,
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BOOL manual_reset = FALSE);
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__attribute__ ((regparm (3)));
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public:
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pid_t master_pid; /* PID of tty master process */
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HANDLE from_master, to_master;
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int read_retval;
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bool was_opened; /* True if opened at least once. */
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void init ();
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HANDLE open_inuse (ACCESS_MASK access);
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HANDLE create_inuse (PSECURITY_ATTRIBUTES);
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bool slave_alive ();
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HANDLE open_mutex (const char *mutex, ACCESS_MASK access);
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inline HANDLE open_output_mutex (ACCESS_MASK access)
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{ return open_mutex (OUTPUT_MUTEX, access); }
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inline HANDLE open_input_mutex (ACCESS_MASK access)
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{ return open_mutex (INPUT_MUTEX, access); }
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bool exists ();
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void set_master_closed () {master_pid = -1;}
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static void __stdcall create_master (int);
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static void __stdcall init_session ();
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friend class fhandler_pty_master;
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};
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class tty_list
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{
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tty ttys[NTTYS];
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static HANDLE mutex;
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public:
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tty * operator [](int n) {return ttys + device::minor (n);}
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int allocate (); /* allocate a pty */
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int connect (int);
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void init ();
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tty_min *get_cttyp ();
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int __stdcall attach (int n) __attribute__ ((regparm (2)));
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static void __stdcall init_session ();
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friend class lock_ttys;
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};
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class lock_ttys
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{
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bool release_me;
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public:
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lock_ttys (DWORD = INFINITE);
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static void release ();
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void dont_release () {release_me = false;}
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~lock_ttys ()
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{
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if (release_me)
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release ();
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}
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};
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extern "C" int ttyslot (void);
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#endif /*_TTY_H*/
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