316 lines
8.2 KiB
C
316 lines
8.2 KiB
C
/* Copyright (c) 2008, 2009
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* Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
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* Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
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* Micah Cowan (micah@cowan.name)
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* Sadrul Habib Chowdhury (sadrul@users.sourceforge.net)
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* Copyright (c) 1993-2002, 2003, 2005, 2006, 2007
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* Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
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* Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
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* Copyright (c) 1987 Oliver Laumann
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (see the file COPYING); if not, see
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* https://www.gnu.org/licenses/, or contact Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
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*
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****************************************************************
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* $Id$ GNU
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*/
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#include "os.h"
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#if defined(__STDC__)
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# ifndef __P
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# define __P(a) a
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# endif
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#else
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# ifndef __P
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# define __P(a) ()
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# endif
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# define const
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#endif
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#include "osdef.h"
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#include "ansi.h"
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#include "sched.h"
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#include "acls.h"
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#include "comm.h"
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#include "layer.h"
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#include "term.h"
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#ifdef DEBUG
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# define STATIC /* a function that the debugger should see */
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#else
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# define STATIC static
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#endif
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#ifdef DEBUG
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# define DEBUGDIR "/tmp/debug"
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# define debugf(a) do {if(dfp){fprintf a;fflush(dfp);}} while (0)
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# define debug(x) debugf((dfp,x))
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# define debug1(x,a) debugf((dfp,x,a))
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# define debug2(x,a,b) debugf((dfp,x,a,b))
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# define debug3(x,a,b,c) debugf((dfp,x,a,b,c))
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extern FILE *dfp;
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#else
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# define debugf(a) do {} while (0)
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# define debug(x) debugf(x)
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# define debug1(x,a) debugf(x)
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# define debug2(x,a,b) debugf(x)
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# define debug3(x,a,b,c) debugf(x)
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#endif
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#ifndef DEBUG
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# define NOASSERT
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#endif
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#ifndef NOASSERT
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# if defined(__STDC__)
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# 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)
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# else
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# 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)
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# endif
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#else
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# define ASSERT(lousy_cpp) do {} while (0)
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#endif
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/* here comes my own Free: jw. */
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#define Free(a) {if ((a) == 0) abort(); else free((void *)(a)); (a)=0;}
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#define Ctrl(c) ((c)&037)
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#define MAXSTR 768
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#define MAXARGS 64
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#define MSGWAIT 5
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#define MSGMINWAIT 1
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#define SILENCEWAIT 30
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/*
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* if a nasty user really wants to try a history of 3000 lines on all 10
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* windows, he will allocate 8 MegaBytes of memory, which is quite enough.
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*/
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#define MAXHISTHEIGHT 3000
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#define DEFAULTHISTHEIGHT 100
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#if defined(NAME_MAX) && NAME_MAX < 16
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# define DEFAULT_BUFFERFILE "/tmp/screen-xchg"
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#else
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# define DEFAULT_BUFFERFILE "/tmp/screen-exchange"
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#endif
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#if defined(hpux) && !(defined(VSUSP) && defined(VDSUSP) && defined(VWERASE) && defined(VLNEXT))
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# define HPUX_LTCHARS_HACK
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#endif
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struct mode
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{
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#ifdef POSIX
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struct termios tio;
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# ifdef HPUX_LTCHARS_HACK
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struct ltchars m_ltchars;
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# endif /* HPUX_LTCHARS_HACK */
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#else /* POSIX */
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# ifdef TERMIO
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struct termio tio;
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# ifdef CYTERMIO
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int m_mapkey;
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int m_mapscreen;
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int m_backspace;
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# endif
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# else /* TERMIO */
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struct sgttyb m_ttyb;
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struct tchars m_tchars;
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struct ltchars m_ltchars;
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int m_ldisc;
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int m_lmode;
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# endif /* TERMIO */
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#endif /* POSIX */
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#if defined(KANJI) && defined(TIOCKSET)
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struct jtchars m_jtchars;
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int m_knjmode;
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#endif
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};
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/* #include "logfile.h" */ /* (requires stat.h) struct logfile */
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#include "image.h"
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#include "canvas.h"
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#include "display.h"
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#include "window.h"
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/*
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* Parameters for the Detach() routine
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*/
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#define D_DETACH 0
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#define D_STOP 1
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#define D_REMOTE 2
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#define D_POWER 3
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#define D_REMOTE_POWER 4
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#define D_LOCK 5
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#define D_HANGUP 6
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/*
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* Here are the messages the attacher sends to the backend
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*/
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#define MSG_CREATE 0
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#define MSG_ERROR 1
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#define MSG_ATTACH 2
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#define MSG_CONT 3
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#define MSG_DETACH 4
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#define MSG_POW_DETACH 5
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#define MSG_WINCH 6
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#define MSG_HANGUP 7
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#define MSG_COMMAND 8
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#define MSG_QUERY 9
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/*
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* versions of struct msg:
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* 0: screen version 3.6.6 (version count introduced)
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* 1: screen version 4.1.0devel (revisions e3fc19a upto 8147d08)
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* A few revisions after 8147d08 incorrectly
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* carried version 1, but should have carried 2.
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* 2: screen version 4.1.0devel (revisions 8b46d8a upto YYYYYYY)
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* 3: screen version 4.2.0 (was incorrectly originally. Patched here)
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* 4: screen version 4.2.1 (bumped once again due to changed terminal and login length)
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* 5: screen version 4.4.0 (fix screenterm size)
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*/
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#define MSG_VERSION 5
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#define MSG_REVISION (('m'<<24) | ('s'<<16) | ('g'<<8) | MSG_VERSION)
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struct msg
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{
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int protocol_revision; /* reduce harm done by incompatible messages */
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int type;
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char m_tty[MAXPATHLEN]; /* ttyname */
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union
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{
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struct
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{
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int lflag;
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int aflag;
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int flowflag;
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int hheight; /* size of scrollback buffer */
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int nargs;
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char line[MAXPATHLEN];
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char dir[MAXPATHLEN];
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char screenterm[MAXTERMLEN + 1]; /* is screen really "screen" ? */
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}
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create;
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struct
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{
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char auser[MAXLOGINLEN + 1]; /* username */
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int apid; /* pid of frontend */
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int adaptflag; /* adapt window size? */
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int lines, columns; /* display size */
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char preselect[20];
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int esc; /* his new escape character unless -1 */
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int meta_esc; /* his new meta esc character unless -1 */
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char envterm[MAXTERMLEN + 1]; /* terminal type */
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int encoding; /* encoding of display */
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int detachfirst; /* whether to detach remote sessions first */
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}
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attach;
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struct
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{
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char duser[MAXLOGINLEN + 1]; /* username */
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int dpid; /* pid of frontend */
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}
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detach;
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struct
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{
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char auser[MAXLOGINLEN + 1]; /* username */
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int nargs;
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char cmd[MAXPATHLEN]; /* command */
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int apid; /* pid of frontend */
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char preselect[20];
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char writeback[MAXPATHLEN]; /* The socket to write the result.
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Only used for MSG_QUERY */
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}
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command;
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char message[MAXPATHLEN * 2];
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} m;
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};
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/*
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* And the signals the attacher receives from the backend
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*/
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#define SIG_BYE SIGHUP
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#define SIG_POWER_BYE SIGUSR1
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#define SIG_LOCK SIGUSR2
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#define SIG_STOP SIGTSTP
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#ifdef SIGIO
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#define SIG_NODEBUG SIGIO /* triggerd by command 'debug off' */
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#endif
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#define BELL (Ctrl('g'))
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#define VBELLWAIT 1 /* No. of seconds a vbell will be displayed */
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#define BELL_ON 0 /* No bell has occurred in the window */
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#define BELL_FOUND 1 /* A bell has occurred, but user not yet notified */
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#define BELL_DONE 2 /* A bell has occured, user has been notified */
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#define BELL_VISUAL 3 /* A bell has occured in fore win, notify him visually */
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#define MON_OFF 0 /* Monitoring is off in the window */
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#define MON_ON 1 /* No activity has occurred in the window */
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#define MON_FOUND 2 /* Activity has occured, but user not yet notified */
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#define MON_DONE 3 /* Activity has occured, user has been notified */
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#define DUMP_TERMCAP 0 /* WriteFile() options */
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#define DUMP_HARDCOPY 1
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#define DUMP_EXCHANGE 2
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#define DUMP_SCROLLBACK 3
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#define SILENCE_OFF 0 /* Not checking for silence */
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#define SILENCE_ON 1 /* Window being monitored for silence */
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#define SILENCE_FOUND 2 /* Window is silent */
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#define SILENCE_DONE 3 /* Window is silent and user is notified */
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extern char strnomem[];
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/*
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* line modes used by Input()
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*/
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#define INP_COOKED 0
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#define INP_NOECHO 1
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#define INP_RAW 2
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#define INP_EVERY 4
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#ifdef MULTIUSER
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struct acl
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{
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struct acl *next;
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char *name;
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};
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#endif
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/* register list */
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#define MAX_PLOP_DEFS 256
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struct baud_values
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{
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int idx; /* the index in the bsd-is padding lookup table */
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int bps; /* bits per seconds */
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int sym; /* symbol defined in ttydev.h */
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};
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/*
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* windowlist orders
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*/
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#define WLIST_NUM 0
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#define WLIST_MRU 1
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#define WLIST_NESTED 2
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