src/screen.h

   1 /* Copyright (c) 1993-2002
   2  *      Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
   3  *      Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
   4  * Copyright (c) 1987 Oliver Laumann
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program (see the file COPYING); if not, write to the
  18  * Free Software Foundation, Inc.,
  19  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
  20  *
  21  ****************************************************************
  22  * $Id$ FAU
  23  */
  24
  25 #include "os.h"
  26
  27 #if defined(__STDC__)
  28 # ifndef __P
  29 #  define __P(a) a
  30 # endif
  31 #else
  32 # ifndef __P
  33 #  define __P(a) ()
  34 # endif
  35 # define const
  36 #endif
  37
  38 #include "osdef.h"
  39
  40 #include "ansi.h"
  41 #include "sched.h"
  42 #include "acls.h"
  43 #include "comm.h"
  44 #include "layer.h"
  45 #include "term.h"
  46 #include "script.h"
  47
  48
  49 #ifdef DEBUG
  50 # define STATIC         /* a function that the debugger should see */
  51 #else
  52 # define STATIC static
  53 #endif
  54
  55 #ifdef DEBUG
  56 # define DEBUGDIR "/tmp/debug"
  57 # define debugf(a)       do {if(dfp){fprintf a;fflush(dfp);}} while (0)
  58 # define debug(x)        debugf((dfp,x))
  59 # define debug1(x,a)     debugf((dfp,x,a))
  60 # define debug2(x,a,b)   debugf((dfp,x,a,b))
  61 # define debug3(x,a,b,c) debugf((dfp,x,a,b,c))
  62   extern FILE *dfp;
  63 #else
  64 # define debugf(a)       do {} while (0)
  65 # define debug(x)        debugf(x)
  66 # define debug1(x,a)     debugf(x)
  67 # define debug2(x,a,b)   debugf(x)
  68 # define debug3(x,a,b,c) debugf(x)
  69 #endif
  70
  71 #ifndef DEBUG
  72 # define NOASSERT
  73 #endif
  74
  75 #ifndef NOASSERT
  76 # if defined(__STDC__)
  77 #  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)
  78 # else
  79 #  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)
  80 # endif
  81 #else
  82 # define ASSERT(lousy_cpp) do {} while (0)
  83 #endif
  84
  85 /* here comes my own Free: jw. */
  86 #define Free(a) {if ((a) == 0) abort(); else free((void *)(a)); (a)=0;}
  87
  88 #define Ctrl(c) ((c)&037)
  89
  90 #define MAXSTR          256
  91 #define MAXARGS         64
  92 #define MSGWAIT         5
  93 #define MSGMINWAIT      1
  94 #define SILENCEWAIT     30
  95
  96 /*
  97  * if a nasty user really wants to try a history of 3000 lines on all 10
  98  * windows, he will allocate 8 MegaBytes of memory, which is quite enough.
  99  */
 100 #define MAXHISTHEIGHT           3000
 101 #define DEFAULTHISTHEIGHT       100
 102 #if defined(NAME_MAX) && NAME_MAX < 16
 103 # define DEFAULT_BUFFERFILE     "/tmp/screen-xchg"
 104 #else
 105 # define DEFAULT_BUFFERFILE     "/tmp/screen-exchange"
 106 #endif
 107
 108
 109 #if defined(hpux) && !(defined(VSUSP) && defined(VDSUSP) && defined(VWERASE) && defined(VLNEXT))
 110 # define HPUX_LTCHARS_HACK
 111 #endif
 112
 113 struct mode
 114 {
 115 #ifdef POSIX
 116   struct termios tio;
 117 # ifdef HPUX_LTCHARS_HACK
 118   struct ltchars m_ltchars;
 119 # endif /* HPUX_LTCHARS_HACK */
 120 #else /* POSIX */
 121 # ifdef TERMIO
 122   struct termio tio;
 123 #  ifdef CYTERMIO
 124   int m_mapkey;
 125   int m_mapscreen;
 126   int m_backspace;
 127 #  endif
 128 # else /* TERMIO */
 129   struct sgttyb m_ttyb;
 130   struct tchars m_tchars;
 131   struct ltchars m_ltchars;
 132   int m_ldisc;
 133   int m_lmode;
 134 # endif /* TERMIO */
 135 #endif /* POSIX */
 136 #if defined(KANJI) && defined(TIOCKSET)
 137   struct jtchars m_jtchars;
 138   int m_knjmode;
 139 #endif
 140 };
 141
 142
 143 /* #include "logfile.h" */      /* (requires stat.h) struct logfile */
 144 #include "image.h"
 145 #include "display.h"
 146 #include "window.h"
 147
 148 /*
 149  * Parameters for the Detach() routine
 150  */
 151 #define D_DETACH        0
 152 #define D_STOP          1
 153 #define D_REMOTE        2
 154 #define D_POWER         3
 155 #define D_REMOTE_POWER  4
 156 #define D_LOCK          5
 157 #define D_HANGUP        6
 158
 159 /*
 160  * Here are the messages the attacher sends to the backend
 161  */
 162 #define MSG_CREATE      0
 163 #define MSG_ERROR       1
 164 #define MSG_ATTACH      2
 165 #define MSG_CONT        3
 166 #define MSG_DETACH      4
 167 #define MSG_POW_DETACH  5
 168 #define MSG_WINCH       6
 169 #define MSG_HANGUP      7
 170 #define MSG_COMMAND     8
 171
 172 /*
 173  * versions of struct msg:
 174  * 0:   screen version 3.6.6 (version count introduced)
 175  */
 176 #define MSG_VERSION     0
 177 #define MSG_REVISION    (('m'<<24) | ('s'<<16) | ('g'<<8) | MSG_VERSION)
 178 struct msg
 179 {
 180   int protocol_revision;        /* reduce harm done by incompatible messages */
 181   int type;
 182   char m_tty[MAXPATHLEN];       /* ttyname */
 183   union
 184     {
 185       struct
 186         {
 187           int lflag;
 188           int aflag;
 189           int flowflag;
 190           int hheight;          /* size of scrollback buffer */
 191           int nargs;
 192           char line[MAXPATHLEN];
 193           char dir[MAXPATHLEN];
 194           char screenterm[20];  /* is screen really "screen" ? */
 195         }
 196       create;
 197       struct
 198         {
 199           char auser[20 + 1];   /* username */
 200           int apid;             /* pid of frontend */
 201           int adaptflag;        /* adapt window size? */
 202           int lines, columns;   /* display size */
 203           char preselect[20];
 204           int esc;              /* his new escape character unless -1 */
 205           int meta_esc;         /* his new meta esc character unless -1 */
 206           char envterm[20 + 1]; /* terminal type */
 207           int encoding;         /* encoding of display */
 208         }
 209       attach;
 210       struct
 211         {
 212           char duser[20 + 1];   /* username */
 213           int dpid;             /* pid of frontend */
 214         }
 215       detach;
 216       struct
 217         {
 218           char auser[20 + 1];   /* username */
 219           int nargs;
 220           char cmd[MAXPATHLEN]; /* command */
 221           int apid;             /* pid of frontend */
 222           char preselect[20];
 223         }
 224       command;
 225       char message[MAXPATHLEN * 2];
 226     } m;
 227 };
 228
 229 /*
 230  * And the signals the attacher receives from the backend
 231  */
 232 #define SIG_BYE         SIGHUP
 233 #define SIG_POWER_BYE   SIGUSR1
 234 #define SIG_LOCK        SIGUSR2
 235 #define SIG_STOP        SIGTSTP
 236 #ifdef SIGIO
 237 #define SIG_NODEBUG     SIGIO           /* triggerd by command 'debug off' */
 238 #endif
 239
 240
 241 #define BELL            (Ctrl('g'))
 242 #define VBELLWAIT       1 /* No. of seconds a vbell will be displayed */
 243
 244 #define BELL_ON         0 /* No bell has occurred in the window */
 245 #define BELL_FOUND      1 /* A bell has occurred, but user not yet notified */
 246 #define BELL_DONE       2 /* A bell has occured, user has been notified */
 247
 248 #define BELL_VISUAL     3 /* A bell has occured in fore win, notify him visually */
 249
 250 #define MON_OFF         0 /* Monitoring is off in the window */
 251 #define MON_ON          1 /* No activity has occurred in the window */
 252 #define MON_FOUND       2 /* Activity has occured, but user not yet notified */
 253 #define MON_DONE        3 /* Activity has occured, user has been notified */
 254
 255 #define DUMP_TERMCAP    0 /* WriteFile() options */
 256 #define DUMP_HARDCOPY   1
 257 #define DUMP_EXCHANGE   2
 258 #define DUMP_SCROLLBACK 3
 259
 260 #define SILENCE_OFF     0
 261 #define SILENCE_ON      1
 262
 263 extern char strnomem[];
 264
 265 /*
 266  * line modes used by Input()
 267  */
 268 #define INP_COOKED      0
 269 #define INP_NOECHO      1
 270 #define INP_RAW         2
 271 #define INP_EVERY       4
 272
 273
 274 #ifdef MULTIUSER
 275 struct acl
 276 {
 277   struct acl *next;
 278   char *name;
 279 };
 280 #endif
 281
 282 /* register list */
 283 #define MAX_PLOP_DEFS 256
 284
 285 struct baud_values
 286 {
 287   int idx;      /* the index in the bsd-is padding lookup table */
 288   int bps;      /* bits per seconds */
 289   int sym;      /* symbol defined in ttydev.h */
 290 };
 291
 292 /*
 293  * windowlist orders
 294  */
 295 #define WLIST_NUM 0
 296 #define WLIST_MRU 1
 297 #define WLIST_NESTED 2