/* 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 * https://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) * 5: screen version 4.4.0 (fix screenterm size) */ #define MSG_VERSION 5 #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 + 1]; /* 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