/* Copyright (c) 2008, 2009
* Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
* Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
* Micah Cowan (micah@cowan.name)
* Sadrul Habib Chowdhury (sadrul@users.sourceforge.net)
* Copyright (c) 1993-2002, 2003, 2005, 2006, 2007
* Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
* Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
* Copyright (c) 1987 Oliver Laumann
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (see the file COPYING); if not, see
* http://www.gnu.org/licenses/, or contact Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*
****************************************************************
* $Id$ GNU
*/
#include "os.h"
#if defined(__STDC__)
# ifndef __P
# define __P(a) a
# endif
#else
# ifndef __P
# define __P(a) ()
# endif
# define const
#endif
#include "osdef.h"
#include "ansi.h"
#include "sched.h"
#include "acls.h"
#include "comm.h"
#include "layer.h"
#include "term.h"
#ifdef DEBUG
# define STATIC /* a function that the debugger should see */
#else
# define STATIC static
#endif
#ifdef DEBUG
# define DEBUGDIR "/tmp/debug"
# define debugf(a) do {if(dfp){fprintf a;fflush(dfp);}} while (0)
# define debug(x) debugf((dfp,x))
# define debug1(x,a) debugf((dfp,x,a))
# define debug2(x,a,b) debugf((dfp,x,a,b))
# define debug3(x,a,b,c) debugf((dfp,x,a,b,c))
extern FILE *dfp;
#else
# define debugf(a) do {} while (0)
# define debug(x) debugf(x)
# define debug1(x,a) debugf(x)
# define debug2(x,a,b) debugf(x)
# define debug3(x,a,b,c) debugf(x)
#endif
#ifndef DEBUG
# define NOASSERT
#endif
#ifndef NOASSERT
# if defined(__STDC__)
# define ASSERT(lousy_cpp) do {if (!(lousy_cpp)) {if (!dfp) opendebug(0, 1);debug2("ASSERT("#lousy_cpp") failed file %s line %d\n", __FILE__, __LINE__);abort();}} while (0)
# else
# define ASSERT(lousy_cpp) do {if (!(lousy_cpp)) {if (!dfp) opendebug(0, 1);debug2("ASSERT(lousy_cpp) failed file %s line %d\n", __FILE__, __LINE__);abort();}} while (0)
# endif
#else
# define ASSERT(lousy_cpp) do {} while (0)
#endif
/* here comes my own Free: jw. */
#define Free(a) {if ((a) == 0) abort(); else free((void *)(a)); (a)=0;}
#define Ctrl(c) ((c)&037)
#define MAXSTR 768
#define MAXARGS 64
#define MSGWAIT 5
#define MSGMINWAIT 1
#define SILENCEWAIT 30
/*
* if a nasty user really wants to try a history of 3000 lines on all 10
* windows, he will allocate 8 MegaBytes of memory, which is quite enough.
*/
#define MAXHISTHEIGHT 3000
#define DEFAULTHISTHEIGHT 100
#if defined(NAME_MAX) && NAME_MAX < 16
# define DEFAULT_BUFFERFILE "/tmp/screen-xchg"
#else
# define DEFAULT_BUFFERFILE "/tmp/screen-exchange"
#endif
#if defined(hpux) && !(defined(VSUSP) && defined(VDSUSP) && defined(VWERASE) && defined(VLNEXT))
# define HPUX_LTCHARS_HACK
#endif
struct mode
{
#ifdef POSIX
struct termios tio;
# ifdef HPUX_LTCHARS_HACK
struct ltchars m_ltchars;
# endif /* HPUX_LTCHARS_HACK */
#else /* POSIX */
# ifdef TERMIO
struct termio tio;
# ifdef CYTERMIO
int m_mapkey;
int m_mapscreen;
int m_backspace;
# endif
# else /* TERMIO */
struct sgttyb m_ttyb;
struct tchars m_tchars;
struct ltchars m_ltchars;
int m_ldisc;
int m_lmode;
# endif /* TERMIO */
#endif /* POSIX */
#if defined(KANJI) && defined(TIOCKSET)
struct jtchars m_jtchars;
int m_knjmode;
#endif
};
/* #include "logfile.h" */ /* (requires stat.h) struct logfile */
#include "image.h"
#include "canvas.h"
#include "display.h"
#include "window.h"
/*
* Parameters for the Detach() routine
*/
#define D_DETACH 0
#define D_STOP 1
#define D_REMOTE 2
#define D_POWER 3
#define D_REMOTE_POWER 4
#define D_LOCK 5
#define D_HANGUP 6
/*
* Here are the messages the attacher sends to the backend
*/
#define MSG_CREATE 0
#define MSG_ERROR 1
#define MSG_ATTACH 2
#define MSG_CONT 3
#define MSG_DETACH 4
#define MSG_POW_DETACH 5
#define MSG_WINCH 6
#define MSG_HANGUP 7
#define MSG_COMMAND 8
#define MSG_QUERY 9
/*
* versions of struct msg:
* 0: screen version 3.6.6 (version count introduced)
* 1: screen version 4.1.0devel (revisions e3fc19a upto 8147d08)
* A few revisions after 8147d08 incorrectly
* carried version 1, but should have carried 2.
* 2: screen version 4.1.0devel (revisions 8b46d8a upto YYYYYYY)
* 3: screen version 4.2.0 (was incorrectly originally. Patched here)
* 4: screen version 4.2.1 (bumped once again due to changed terminal and login length)
*/
#define MSG_VERSION 4
#define MSG_REVISION (('m'<<24) | ('s'<<16) | ('g'<<8) | MSG_VERSION)
struct msg
{
int protocol_revision; /* reduce harm done by incompatible messages */
int type;
char m_tty[MAXPATHLEN]; /* ttyname */
union
{
struct
{
int lflag;
int aflag;
int flowflag;
int hheight; /* size of scrollback buffer */
int nargs;
char line[MAXPATHLEN];
char dir[MAXPATHLEN];
char screenterm[MAXTERMLEN]; /* is screen really "screen" ? */
}
create;
struct
{
char auser[MAXLOGINLEN + 1]; /* username */
int apid; /* pid of frontend */
int adaptflag; /* adapt window size? */
int lines, columns; /* display size */
char preselect[20];
int esc; /* his new escape character unless -1 */
int meta_esc; /* his new meta esc character unless -1 */
char envterm[MAXTERMLEN + 1]; /* terminal type */
int encoding; /* encoding of display */
int detachfirst; /* whether to detach remote sessions first */
}
attach;
struct
{
char duser[MAXLOGINLEN + 1]; /* username */
int dpid; /* pid of frontend */
}
detach;
struct
{
char auser[MAXLOGINLEN + 1]; /* username */
int nargs;
char cmd[MAXPATHLEN]; /* command */
int apid; /* pid of frontend */
char preselect[20];
char writeback[MAXPATHLEN]; /* The socket to write the result.
Only used for MSG_QUERY */
}
command;
char message[MAXPATHLEN * 2];
} m;
};
/*
* And the signals the attacher receives from the backend
*/
#define SIG_BYE SIGHUP
#define SIG_POWER_BYE SIGUSR1
#define SIG_LOCK SIGUSR2
#define SIG_STOP SIGTSTP
#ifdef SIGIO
#define SIG_NODEBUG SIGIO /* triggerd by command 'debug off' */
#endif
#define BELL (Ctrl('g'))
#define VBELLWAIT 1 /* No. of seconds a vbell will be displayed */
#define BELL_ON 0 /* No bell has occurred in the window */
#define BELL_FOUND 1 /* A bell has occurred, but user not yet notified */
#define BELL_DONE 2 /* A bell has occured, user has been notified */
#define BELL_VISUAL 3 /* A bell has occured in fore win, notify him visually */
#define MON_OFF 0 /* Monitoring is off in the window */
#define MON_ON 1 /* No activity has occurred in the window */
#define MON_FOUND 2 /* Activity has occured, but user not yet notified */
#define MON_DONE 3 /* Activity has occured, user has been notified */
#define DUMP_TERMCAP 0 /* WriteFile() options */
#define DUMP_HARDCOPY 1
#define DUMP_EXCHANGE 2
#define DUMP_SCROLLBACK 3
#define SILENCE_OFF 0 /* Not checking for silence */
#define SILENCE_ON 1 /* Window being monitored for silence */
#define SILENCE_FOUND 2 /* Window is silent */
#define SILENCE_DONE 3 /* Window is silent and user is notified */
extern char strnomem[];
/*
* line modes used by Input()
*/
#define INP_COOKED 0
#define INP_NOECHO 1
#define INP_RAW 2
#define INP_EVERY 4
#ifdef MULTIUSER
struct acl
{
struct acl *next;
char *name;
};
#endif
/* register list */
#define MAX_PLOP_DEFS 256
struct baud_values
{
int idx; /* the index in the bsd-is padding lookup table */
int bps; /* bits per seconds */
int sym; /* symbol defined in ttydev.h */
};
/*
* windowlist orders
*/
#define WLIST_NUM 0
#define WLIST_MRU 1
#define WLIST_NESTED 2