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/* tty.h: shared tty info for cygwin
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. */
#ifndef _TTY_H
#define _TTY_H
/* tty tables */
#define INP_BUFFER_SIZE 256
#define OUT_BUFFER_SIZE 256
#define NTTYS 128
#define real_tty_attached(p) (CTTY_IS_VALID ((p)->ctty) && !iscons_dev ((p)->ctty))
/* Input/Output/ioctl events */
#define INPUT_AVAILABLE_EVENT "cygtty.input.avail"
#define OUTPUT_MUTEX "cygtty.output.mutex"
#define INPUT_MUTEX "cygtty.input.mutex"
#define PIPE_SW_MUTEX "cygtty.pipe_sw.mutex"
#define TTY_SLAVE_ALIVE "cygtty.slave_alive"
#define TTY_SLAVE_READING "cygtty.slave_reading"
#include <sys/termios.h>
#ifndef MIN_CTRL_C_SLOP
#define MIN_CTRL_C_SLOP 50
#endif
typedef void *HPCON;
#include "devices.h"
class tty_min
{
pid_t sid; /* Session ID of tty */
struct status_flags
{
unsigned initialized : 1; /* Set if tty is initialized */
} status;
public:
pid_t pgid;
bool output_stopped; /* FIXME: Maybe do this with a mutex someday? */
fh_devices ntty;
ULONGLONG last_ctrl_c; /* tick count of last ctrl-c */
bool is_console;
int last_sig;
IMPLEMENT_STATUS_FLAG (bool, initialized)
struct termios ti;
struct winsize winsize;
/* ioctl requests buffer */
int cmd;
union
{
struct termios termios;
struct winsize winsize;
int value;
pid_t pid;
} arg;
/* XXX_retval variables holds master's completion codes. Error are stored as
* -ERRNO
*/
int ioctl_retval;
void setntty (_major_t t, _minor_t n) {ntty = (fh_devices) FHDEV (t, n);}
dev_t getntty () const {return ntty;}
_minor_t get_minor () const {return device::minor (ntty);}
pid_t getpgid () const {return pgid;}
void setpgid (int pid);
int getsid () const {return sid;}
void setsid (pid_t tsid) {sid = tsid;}
void kill_pgrp (int, pid_t target_pgid = 0);
int is_orphaned_process_group (int);
const char *ttyname () __attribute (());
};
/* The name *nat* comes from 'native' which means non-cygwin
(native windows). They are used for non-cygwin process. */
class fhandler_pty_master;
class tty: public tty_min
{
HANDLE get_event (const char *fmt, PSECURITY_ATTRIBUTES sa,
BOOL manual_reset = FALSE);
public:
pid_t master_pid; /* PID of tty master process */
/* Transfer direction for fhandler_pty_slave::transfer_input() */
enum xfer_dir
{
to_cyg,
to_nat
};
enum cons_mode
{
restore, /* For restoring when exit from cygwin. */
cygwin, /* For cygwin apps */
native /* For native apps executed from cygwin. */
};
private:
HANDLE _from_master_nat;
HANDLE _from_master;
HANDLE _to_master_nat;
HANDLE _to_master;
HANDLE _to_slave_nat;
HANDLE _to_slave;
bool pcon_activated;
bool pcon_start;
pid_t pcon_start_pid;
bool switch_to_nat_pipe;
DWORD nat_pipe_owner_pid;
UINT term_code_page;
ULONGLONG fwd_last_time;
bool fwd_not_empty;
HANDLE h_pcon_write_pipe;
HANDLE h_pcon_condrv_reference;
HANDLE h_pcon_conhost_process;
HANDLE h_pcon_in;
HANDLE h_pcon_out;
bool pcon_cap_checked;
bool has_csi6n;
bool need_invisible_console;
pid_t invisible_console_pid;
UINT previous_code_page;
UINT previous_output_code_page;
bool master_is_running_as_service;
bool req_xfer_input;
xfer_dir pty_input_state;
bool mask_flusho;
bool discard_input;
bool stop_fwd_thread;
public:
HANDLE from_master_nat () const { return _from_master_nat; }
HANDLE from_master () const { return _from_master; }
HANDLE to_master_nat () const { return _to_master_nat; }
HANDLE to_master () const { return _to_master; }
HANDLE to_slave_nat () const { return _to_slave_nat; }
HANDLE to_slave () const { return _to_slave; }
void set_from_master_nat (HANDLE h) { _from_master_nat = h; }
void set_from_master (HANDLE h) { _from_master = h; }
void set_to_master_nat (HANDLE h) { _to_master_nat = h; }
void set_to_master (HANDLE h) { _to_master = h; }
void set_to_slave_nat (HANDLE h) { _to_slave_nat = h; }
void set_to_slave (HANDLE h) { _to_slave = h; }
int read_retval;
bool was_opened; /* True if opened at least once. */
int column; /* Current Column */
void init ();
HANDLE open_inuse (ACCESS_MASK access);
HANDLE create_inuse (PSECURITY_ATTRIBUTES);
bool slave_alive ();
HANDLE open_mutex (const char *mutex, ACCESS_MASK access);
inline HANDLE open_output_mutex (ACCESS_MASK access)
{ return open_mutex (OUTPUT_MUTEX, access); }
inline HANDLE open_input_mutex (ACCESS_MASK access)
{ return open_mutex (INPUT_MUTEX, access); }
bool exists ();
bool not_allocated (HANDLE&, HANDLE&);
void set_master_ctl_closed () {master_pid = -1;}
static void create_master (int);
static void init_session ();
void wait_fwd ();
bool pty_input_state_eq (xfer_dir x) { return pty_input_state == x; }
bool nat_fg (pid_t pgid);
friend class fhandler_pty_common;
friend class fhandler_pty_master;
friend class fhandler_pty_slave;
friend class tty_min;
};
class tty_list
{
tty ttys[NTTYS];
static HANDLE mutex;
public:
tty * operator [](int n) {return ttys + device::minor (n);}
int allocate (HANDLE& r, HANDLE& w); /* allocate a pty */
int connect (int);
void init ();
tty_min *get_cttyp ();
int attach (int n);
static void init_session ();
friend class lock_ttys;
};
class lock_ttys
{
bool release_me;
public:
lock_ttys (DWORD = INFINITE);
static void release ();
void dont_release () {release_me = false;}
~lock_ttys ()
{
if (release_me)
release ();
}
};
extern "C" int ttyslot (void);
/* Console stuff */
#define MAX_CONS_DEV 128
#define CONS_SCAN_UNUSED (-1)
#endif /*_TTY_H*/
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