st.c

   1 /* See LICENSE for licence details. */
   2 #define _XOPEN_SOURCE 600
   3 #include <ctype.h>
   4 #include <errno.h>
   5 #include <fcntl.h>
   6 #include <limits.h>
   7 #include <locale.h>
   8 #include <stdarg.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <signal.h>
  13 #include <sys/ioctl.h>
  14 #include <sys/select.h>
  15 #include <sys/stat.h>
  16 #include <sys/types.h>
  17 #include <sys/wait.h>
  18 #include <unistd.h>
  19 #include <X11/Xlib.h>
  20 #include <X11/keysym.h>
  21 #include <X11/Xutil.h>
  22
  23 #if   defined(LINUX)
  24  #include <pty.h>
  25 #elif defined(OPENBSD)
  26  #include <util.h>
  27 #elif defined(FREEBSD)
  28  #include <libutil.h>
  29 #endif
  30
  31 /* Arbitrary sizes */
  32 #define ESC_TITLE_SIZ 256
  33 #define ESC_BUF_SIZ   256
  34 #define ESC_ARG_SIZ   16
  35 #define DRAW_BUF_SIZ  1024
  36
  37 #define SERRNO strerror(errno)
  38 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
  39 #define MAX(a, b)  ((a) < (b) ? (b) : (a))
  40 #define LEN(a)     (sizeof(a) / sizeof(a[0]))
  41 #define DEFAULT(a, b)     (a) = (a) ? (a) : (b)
  42 #define BETWEEN(x, a, b)  ((a) <= (x) && (x) <= (b))
  43 #define LIMIT(x, a, b)    (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  44 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  45 #define IS_SET(flag) (term.mode & (flag))
  46
  47 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
  48 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
  49 enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT, CURSOR_HIDE = 1,
  50        CURSOR_DRAW = 0, CURSOR_SAVE, CURSOR_LOAD };
  51 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
  52 enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4 };
  53 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
  54 enum { SCREEN_UPDATE, SCREEN_REDRAW };
  55
  56 typedef struct {
  57         char c;     /* character code  */
  58         char mode;  /* attribute flags */
  59         int fg;     /* foreground      */
  60         int bg;     /* background      */
  61         char state; /* state flags     */
  62 } Glyph;
  63
  64 typedef Glyph* Line;
  65
  66 typedef struct {
  67         Glyph attr;      /* current char attributes */
  68         int x;
  69         int y;
  70         char hide;
  71 } TCursor;
  72
  73 /* CSI Escape sequence structs */
  74 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
  75 typedef struct {
  76         char buf[ESC_BUF_SIZ]; /* raw string */
  77         int len;                           /* raw string length */
  78         char priv;
  79         int arg[ESC_ARG_SIZ];
  80         int narg;                          /* nb of args */
  81         char mode;
  82 } CSIEscape;
  83
  84 /* Internal representation of the screen */
  85 typedef struct {
  86         int row;        /* nb row */
  87         int col;        /* nb col */
  88         Line* line; /* screen */
  89         TCursor c;      /* cursor */
  90         int top;        /* top    scroll limit */
  91         int bot;        /* bottom scroll limit */
  92         int mode;       /* terminal mode flags */
  93         int esc;        /* escape state flags */
  94         char title[ESC_TITLE_SIZ];
  95         int titlelen;
  96 } Term;
  97
  98 /* Purely graphic info */
  99 typedef struct {
 100         Display* dis;
 101         Window win;
 102         Pixmap buf;
 103         int scr;
 104         int w;  /* window width  */
 105         int h;  /* window height */
 106         int bufw; /* pixmap width  */
 107         int bufh; /* pixmap height */
 108         int ch; /* char height */
 109         int cw; /* char width  */
 110 } XWindow;
 111
 112 typedef struct {
 113         KeySym k;
 114         char s[ESC_BUF_SIZ];
 115 } Key;
 116
 117 /* Drawing Context */
 118 typedef struct {
 119         unsigned long col[256];
 120         XFontStruct* font;
 121         XFontStruct* bfont;
 122         GC gc;
 123 } DC;
 124
 125 #include "config.h"
 126
 127 static void die(const char *errstr, ...);
 128 static void draw(int);
 129 static void execsh(void);
 130 static void sigchld(int);
 131 static void run(void);
 132
 133 static void csidump(void);
 134 static void csihandle(void);
 135 static void csiparse(void);
 136 static void csireset(void);
 137
 138 static void tclearregion(int, int, int, int);
 139 static void tcursor(int);
 140 static void tdeletechar(int);
 141 static void tdeleteline(int);
 142 static void tinsertblank(int);
 143 static void tinsertblankline(int);
 144 static void tmoveto(int, int);
 145 static void tnew(int, int);
 146 static void tnewline(void);
 147 static void tputtab(void);
 148 static void tputc(char);
 149 static void tputs(char*, int);
 150 static void treset(void);
 151 static void tresize(int, int);
 152 static void tscrollup(int);
 153 static void tscrolldown(int);
 154 static void tsetattr(int*, int);
 155 static void tsetchar(char);
 156 static void tsetscroll(int, int);
 157
 158 static void ttynew(void);
 159 static void ttyread(void);
 160 static void ttyresize(int, int);
 161 static void ttywrite(const char *, size_t);
 162
 163 static void xbell(void);
 164 static void xdraws(char *, Glyph, int, int, int);
 165 static void xhints(void);
 166 static void xclear(int, int, int, int);
 167 static void xcursor(int);
 168 static void xinit(void);
 169 static void xloadcols(void);
 170
 171 static void expose(XEvent *);
 172 static char* kmap(KeySym);
 173 static void kpress(XEvent *);
 174 static void resize(XEvent *);
 175
 176 static void (*handler[LASTEvent])(XEvent *) = {
 177         [KeyPress] = kpress,
 178         [Expose] = expose,
 179         [ConfigureNotify] = resize
 180 };
 181
 182 /* Globals */
 183 static DC dc;
 184 static XWindow xw;
 185 static Term term;
 186 static CSIEscape escseq;
 187 static int cmdfd;
 188 static pid_t pid;
 189 static int running;
 190
 191 #ifdef DEBUG
 192 void
 193 tdump(void) {
 194         int row, col;
 195         Glyph c;
 196
 197         for(row = 0; row < term.row; row++) {
 198                 for(col = 0; col < term.col; col++) {
 199                         if(col == term.c.x && row == term.c.y)
 200                                 putchar('#');
 201                         else {
 202                                 c = term.line[row][col];
 203                                 putchar(c.state & GLYPH_SET ? c.c : '.');
 204                         }
 205                 }
 206                 putchar('\n');
 207         }
 208 }
 209 #endif
 210
 211 void
 212 die(const char *errstr, ...) {
 213         va_list ap;
 214
 215         va_start(ap, errstr);
 216         vfprintf(stderr, errstr, ap);
 217         va_end(ap);
 218         exit(EXIT_FAILURE);
 219 }
 220
 221 void
 222 execsh(void) {
 223         char *args[3] = {getenv("SHELL"), "-i", NULL};
 224         DEFAULT(args[0], "/bin/sh"); /* if getenv() failed */
 225         putenv("TERM=" TNAME);
 226         execvp(args[0], args);
 227 }
 228
 229 void
 230 xbell(void) {
 231         XSetForeground(xw.dis, dc.gc, dc.col[BellCol]);
 232         XFillRectangle(xw.dis, xw.win, dc.gc, BORDER, BORDER, xw.bufw, xw.bufh);
 233         XFlush(xw.dis);
 234         usleep(BellTime);
 235         draw(SCREEN_REDRAW);
 236 }
 237
 238 void
 239 sigchld(int a) {
 240         int stat = 0;
 241         if(waitpid(pid, &stat, 0) < 0)
 242                 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
 243         if(WIFEXITED(stat))
 244                 exit(WEXITSTATUS(stat));
 245         else
 246                 exit(EXIT_FAILURE);
 247 }
 248
 249 void
 250 ttynew(void) {
 251         int m, s;
 252
 253         /* seems to work fine on linux, openbsd and freebsd */
 254         struct winsize w = {term.row, term.col, 0, 0};
 255         if(openpty(&m, &s, NULL, NULL, &w) < 0)
 256                 die("openpty failed: %s\n", SERRNO);
 257
 258         switch(pid = fork()) {
 259         case -1:
 260                 die("fork failed\n");
 261                 break;
 262         case 0:
 263                 setsid(); /* create a new process group */
 264                 dup2(s, STDIN_FILENO);
 265                 dup2(s, STDOUT_FILENO);
 266                 dup2(s, STDERR_FILENO);
 267                 if(ioctl(s, TIOCSCTTY, NULL) < 0)
 268                         die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
 269                 close(s);
 270                 close(m);
 271                 execsh();
 272                 break;
 273         default:
 274                 close(s);
 275                 cmdfd = m;
 276                 signal(SIGCHLD, sigchld);
 277         }
 278 }
 279
 280 void
 281 dump(char c) {
 282         static int col;
 283         fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
 284         if(++col % 10 == 0)
 285                 fprintf(stderr, "\n");
 286 }
 287
 288 void
 289 ttyread(void) {
 290         char buf[BUFSIZ] = {0};
 291         int ret;
 292
 293         if((ret = read(cmdfd, buf, BUFSIZ)) < 0)
 294                 die("Couldn't read from shell: %s\n", SERRNO);
 295         else
 296                 tputs(buf, ret);
 297 }
 298
 299 void
 300 ttywrite(const char *s, size_t n) {
 301         if(write(cmdfd, s, n) == -1)
 302                 die("write error on tty: %s\n", SERRNO);
 303 }
 304
 305 void
 306 ttyresize(int x, int y) {
 307         struct winsize w;
 308
 309         w.ws_row = term.row;
 310         w.ws_col = term.col;
 311         w.ws_xpixel = w.ws_ypixel = 0;
 312         if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
 313                 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
 314 }
 315
 316 void
 317 tcursor(int mode) {
 318         static TCursor c;
 319
 320         if(mode == CURSOR_SAVE)
 321                 c = term.c;
 322         else if(mode == CURSOR_LOAD)
 323                 term.c = c, tmoveto(c.x, c.y);
 324 }
 325
 326 void
 327 treset(void) {
 328         term.c = (TCursor){{
 329                 .mode = ATTR_NULL,
 330                 .fg = DefaultFG,
 331                 .bg = DefaultBG
 332         }, .x = 0, .y = 0, .hide = 0};
 333
 334         term.top = 0, term.bot = term.row - 1;
 335         term.mode = MODE_WRAP;
 336         tclearregion(0, 0, term.col-1, term.row-1);
 337 }
 338
 339 void
 340 tnew(int col, int row) {
 341         /* set screen size */
 342         term.row = row, term.col = col;
 343         term.line = malloc(term.row * sizeof(Line));
 344         for(row = 0 ; row < term.row; row++)
 345                 term.line[row] = malloc(term.col * sizeof(Glyph));
 346         /* setup screen */
 347         treset();
 348 }
 349
 350 void
 351 tscrolldown (int n) {
 352         int i;
 353         Line temp;
 354
 355         LIMIT(n, 0, term.bot-term.top+1);
 356
 357         for(i = 0; i < n; i++)
 358                 memset(term.line[term.bot-i], 0, term.col*sizeof(Glyph));
 359
 360         for(i = term.bot; i >= term.top+n; i--) {
 361                 temp = term.line[i];
 362                 term.line[i] = term.line[i-n];
 363                 term.line[i-n] = temp;
 364         }
 365 }
 366
 367 void
 368 tscrollup (int n) {
 369         int i;
 370         Line temp;
 371         LIMIT(n, 0, term.bot-term.top+1);
 372
 373         for(i = 0; i < n; i++)
 374                 memset(term.line[term.top+i], 0, term.col*sizeof(Glyph));
 375
 376         for(i = term.top; i <= term.bot-n; i++) {
 377                  temp = term.line[i];
 378                  term.line[i] = term.line[i+n];
 379                  term.line[i+n] = temp;
 380         }
 381 }
 382
 383 void
 384 tnewline(void) {
 385         int y = term.c.y + 1;
 386         if(y > term.bot)
 387                 tscrollup(1), y = term.bot;
 388         tmoveto(0, y);
 389 }
 390
 391 void
 392 csiparse(void) {
 393         /* int noarg = 1; */
 394         char *p = escseq.buf;
 395
 396         escseq.narg = 0;
 397         if(*p == '?')
 398                 escseq.priv = 1, p++;
 399
 400         while(p < escseq.buf+escseq.len) {
 401                 while(isdigit(*p)) {
 402                         escseq.arg[escseq.narg] *= 10;
 403                         escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
 404                 }
 405                 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
 406                         escseq.narg++, p++;
 407                 else {
 408                         escseq.mode = *p;
 409                         escseq.narg++;
 410                         return;
 411                 }
 412         }
 413 }
 414
 415 void
 416 tmoveto(int x, int y) {
 417         term.c.x = x < 0 ? 0 : x >= term.col ? term.col-1 : x;
 418         term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y;
 419 }
 420
 421 void
 422 tsetchar(char c) {
 423         term.line[term.c.y][term.c.x] = term.c.attr;
 424         term.line[term.c.y][term.c.x].c = c;
 425         term.line[term.c.y][term.c.x].state |= GLYPH_SET;
 426 }
 427
 428 void
 429 tclearregion(int x1, int y1, int x2, int y2) {
 430         int y, temp;
 431
 432         if(x1 > x2)
 433                 temp = x1, x1 = x2, x2 = temp;
 434         if(y1 > y2)
 435                 temp = y1, y1 = y2, y2 = temp;
 436
 437         LIMIT(x1, 0, term.col-1);
 438         LIMIT(x2, 0, term.col-1);
 439         LIMIT(y1, 0, term.row-1);
 440         LIMIT(y2, 0, term.row-1);
 441
 442         for(y = y1; y <= y2; y++)
 443                 memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1));
 444 }
 445
 446 void
 447 tdeletechar(int n) {
 448         int src = term.c.x + n;
 449         int dst = term.c.x;
 450         int size = term.col - src;
 451
 452         if(src >= term.col) {
 453                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 454                 return;
 455         }
 456         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 457         tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
 458 }
 459
 460 void
 461 tinsertblank(int n) {
 462         int src = term.c.x;
 463         int dst = src + n;
 464         int size = term.col - dst;
 465
 466         if(dst >= term.col) {
 467                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 468                 return;
 469         }
 470         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 471         tclearregion(src, term.c.y, dst - 1, term.c.y);
 472 }
 473
 474 void
 475 tinsertblankline(int n) {
 476         int i;
 477         Line blank;
 478         int bot = term.bot;
 479
 480         if(term.c.y > term.bot)
 481                 bot = term.row - 1;
 482         else if(term.c.y < term.top)
 483                 bot = term.top - 1;
 484         if(term.c.y + n >= bot) {
 485                 tclearregion(0, term.c.y, term.col-1, bot);
 486                 return;
 487         }
 488         for(i = bot; i >= term.c.y+n; i--) {
 489                 /* swap deleted line <-> blanked line */
 490                 blank = term.line[i];
 491                 term.line[i] = term.line[i-n];
 492                 term.line[i-n] = blank;
 493                 /* blank it */
 494                 memset(blank, 0, term.col * sizeof(Glyph));
 495         }
 496 }
 497
 498 void
 499 tdeleteline(int n) {
 500         int i;
 501         Line blank;
 502         int bot = term.bot;
 503
 504         if(term.c.y > term.bot)
 505                 bot = term.row - 1;
 506         else if(term.c.y < term.top)
 507                 bot = term.top - 1;
 508         if(term.c.y + n >= bot) {
 509                 tclearregion(0, term.c.y, term.col-1, bot);
 510                 return;
 511         }
 512         for(i = term.c.y; i <= bot-n; i++) {
 513                 /* swap deleted line <-> blanked line */
 514                 blank = term.line[i];
 515                 term.line[i] = term.line[i+n];
 516                 term.line[i+n] = blank;
 517                 /* blank it */
 518                 memset(blank, 0, term.col * sizeof(Glyph));
 519         }
 520 }
 521
 522 void
 523 tsetattr(int *attr, int l) {
 524         int i;
 525
 526         for(i = 0; i < l; i++) {
 527                 switch(attr[i]) {
 528                 case 0:
 529                         term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
 530                         term.c.attr.fg = DefaultFG;
 531                         term.c.attr.bg = DefaultBG;
 532                         break;
 533                 case 1:
 534                         term.c.attr.mode |= ATTR_BOLD;
 535                         break;
 536                 case 4:
 537                         term.c.attr.mode |= ATTR_UNDERLINE;
 538                         break;
 539                 case 7:
 540                         term.c.attr.mode |= ATTR_REVERSE;
 541                         break;
 542                 case 22:
 543                         term.c.attr.mode &= ~ATTR_BOLD;
 544                         break;
 545                 case 24:
 546                         term.c.attr.mode &= ~ATTR_UNDERLINE;
 547                         break;
 548                 case 27:
 549                         term.c.attr.mode &= ~ATTR_REVERSE;
 550                         break;
 551                 case 38:
 552                         if (i + 2 < l && attr[i + 1] == 5) {
 553                                 i += 2;
 554                                 if (BETWEEN(attr[i], 0, 255))
 555                                         term.c.attr.fg = attr[i];
 556                                 else
 557                                         fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
 558                         }
 559                         else
 560                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 561                         break;
 562                 case 39:
 563                         term.c.attr.fg = DefaultFG;
 564                         break;
 565                 case 48:
 566                         if (i + 2 < l && attr[i + 1] == 5) {
 567                                 i += 2;
 568                                 if (BETWEEN(attr[i], 0, 255))
 569                                         term.c.attr.bg = attr[i];
 570                                 else
 571                                         fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
 572                         }
 573                         else
 574                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 575                         break;
 576                 case 49:
 577                         term.c.attr.bg = DefaultBG;
 578                         break;
 579                 default:
 580                         if(BETWEEN(attr[i], 30, 37))
 581                                 term.c.attr.fg = attr[i] - 30;
 582                         else if(BETWEEN(attr[i], 40, 47))
 583                                 term.c.attr.bg = attr[i] - 40;
 584                         else if(BETWEEN(attr[i], 90, 97))
 585                                 term.c.attr.fg = attr[i] - 90 + 8;
 586                         else if(BETWEEN(attr[i], 100, 107))
 587                                 term.c.attr.fg = attr[i] - 100 + 8;
 588                         else
 589                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 590                         break;
 591                 }
 592         }
 593 }
 594
 595 void
 596 tsetscroll(int t, int b) {
 597         int temp;
 598
 599         LIMIT(t, 0, term.row-1);
 600         LIMIT(b, 0, term.row-1);
 601         if(t > b) {
 602                 temp = t;
 603                 t = b;
 604                 b = temp;
 605         }
 606         term.top = t;
 607         term.bot = b;
 608 }
 609
 610 void
 611 csihandle(void) {
 612         switch(escseq.mode) {
 613         default:
 614         unknown:
 615                 printf("erresc: unknown csi ");
 616                 csidump();
 617                 /* die(""); */
 618                 break;
 619         case '@': /* ICH -- Insert <n> blank char */
 620                 DEFAULT(escseq.arg[0], 1);
 621                 tinsertblank(escseq.arg[0]);
 622                 break;
 623         case 'A': /* CUU -- Cursor <n> Up */
 624         case 'e':
 625                 DEFAULT(escseq.arg[0], 1);
 626                 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
 627                 break;
 628         case 'B': /* CUD -- Cursor <n> Down */
 629                 DEFAULT(escseq.arg[0], 1);
 630                 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
 631                 break;
 632         case 'C': /* CUF -- Cursor <n> Forward */
 633         case 'a':
 634                 DEFAULT(escseq.arg[0], 1);
 635                 tmoveto(term.c.x+escseq.arg[0], term.c.y);
 636                 break;
 637         case 'D': /* CUB -- Cursor <n> Backward */
 638                 DEFAULT(escseq.arg[0], 1);
 639                 tmoveto(term.c.x-escseq.arg[0], term.c.y);
 640                 break;
 641         case 'E': /* CNL -- Cursor <n> Down and first col */
 642                 DEFAULT(escseq.arg[0], 1);
 643                 tmoveto(0, term.c.y+escseq.arg[0]);
 644                 break;
 645         case 'F': /* CPL -- Cursor <n> Up and first col */
 646                 DEFAULT(escseq.arg[0], 1);
 647                 tmoveto(0, term.c.y-escseq.arg[0]);
 648                 break;
 649         case 'G': /* CHA -- Move to <col> */
 650         case '`': /* XXX: HPA -- same? */
 651                 DEFAULT(escseq.arg[0], 1);
 652                 tmoveto(escseq.arg[0]-1, term.c.y);
 653                 break;
 654         case 'H': /* CUP -- Move to <row> <col> */
 655         case 'f': /* XXX: HVP -- same? */
 656                 DEFAULT(escseq.arg[0], 1);
 657                 DEFAULT(escseq.arg[1], 1);
 658                 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
 659                 break;
 660         /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
 661         case 'J': /* ED -- Clear screen */
 662                 switch(escseq.arg[0]) {
 663                 case 0: /* below */
 664                         tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
 665                         break;
 666                 case 1: /* above */
 667                         tclearregion(0, 0, term.c.x, term.c.y);
 668                         break;
 669                 case 2: /* all */
 670                         tclearregion(0, 0, term.col-1, term.row-1);
 671                         break;
 672                 case 3: /* XXX: erase saved lines (xterm) */
 673                 default:
 674                         goto unknown;
 675                 }
 676                 break;
 677         case 'K': /* EL -- Clear line */
 678                 switch(escseq.arg[0]) {
 679                 case 0: /* right */
 680                         tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 681                         break;
 682                 case 1: /* left */
 683                         tclearregion(0, term.c.y, term.c.x, term.c.y);
 684                         break;
 685                 case 2: /* all */
 686                         tclearregion(0, term.c.y, term.col-1, term.c.y);
 687                         break;
 688                 }
 689                 break;
 690         case 'S': /* SU -- Scroll <n> line up */
 691                 DEFAULT(escseq.arg[0], 1);
 692                 tscrollup(escseq.arg[0]);
 693                 break;
 694         case 'T': /* SD -- Scroll <n> line down */
 695                 DEFAULT(escseq.arg[0], 1);
 696                 tscrolldown(escseq.arg[0]);
 697                 break;
 698         case 'L': /* IL -- Insert <n> blank lines */
 699                 DEFAULT(escseq.arg[0], 1);
 700                 tinsertblankline(escseq.arg[0]);
 701                 break;
 702         case 'l': /* RM -- Reset Mode */
 703                 if(escseq.priv) {
 704                         switch(escseq.arg[0]) {
 705                         case 1:
 706                                 term.mode &= ~MODE_APPKEYPAD;
 707                                 break;
 708                         case 7:
 709                                 term.mode &= ~MODE_WRAP;
 710                                 break;
 711                         case 12: /* att610 -- Stop blinking cursor (IGNORED) */
 712                                 break;
 713                         case 25:
 714                                 term.c.hide = CURSOR_HIDE;
 715                                 break;
 716                         case 1048: /* XXX: no alt. screen to erase/save */
 717                         case 1049:
 718                                 tcursor(CURSOR_LOAD);
 719                                 tclearregion(0, 0, term.col-1, term.row-1);
 720                                 break;
 721                         default:
 722                                 goto unknown;
 723                         }
 724                 } else {
 725                         switch(escseq.arg[0]) {
 726                         case 4:
 727                                 term.mode &= ~MODE_INSERT;
 728                                 break;
 729                         default:
 730                                 goto unknown;
 731                         }
 732                 }
 733                 break;
 734         case 'M': /* DL -- Delete <n> lines */
 735                 DEFAULT(escseq.arg[0], 1);
 736                 tdeleteline(escseq.arg[0]);
 737                 break;
 738         case 'X': /* ECH -- Erase <n> char */
 739                 DEFAULT(escseq.arg[0], 1);
 740                 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
 741                 break;
 742         case 'P': /* DCH -- Delete <n> char */
 743                 DEFAULT(escseq.arg[0], 1);
 744                 tdeletechar(escseq.arg[0]);
 745                 break;
 746         /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
 747         case 'd': /* VPA -- Move to <row> */
 748                 DEFAULT(escseq.arg[0], 1);
 749                 tmoveto(term.c.x, escseq.arg[0]-1);
 750                 break;
 751         case 'h': /* SM -- Set terminal mode */
 752                 if(escseq.priv) {
 753                         switch(escseq.arg[0]) {
 754                         case 1:
 755                                 term.mode |= MODE_APPKEYPAD;
 756                                 break;
 757                         case 7:
 758                                 term.mode |= MODE_WRAP;
 759                                 break;
 760                         case 12: /* att610 -- Start blinking cursor (IGNORED) */
 761                                 break;
 762                         case 25:
 763                                 term.c.hide = CURSOR_DRAW;
 764                                 break;
 765                         case 1048:
 766                         case 1049: /* XXX: no alt. screen to erase/save */
 767                                 tcursor(CURSOR_SAVE);
 768                                 tclearregion(0, 0, term.col-1, term.row-1);
 769                                 break;
 770                         default: goto unknown;
 771                         }
 772                 } else {
 773                         switch(escseq.arg[0]) {
 774                         case 4:
 775                                 term.mode |= MODE_INSERT;
 776                                 break;
 777                         default: goto unknown;
 778                         }
 779                 };
 780                 break;
 781         case 'm': /* SGR -- Terminal attribute (color) */
 782                 tsetattr(escseq.arg, escseq.narg);
 783                 break;
 784         case 'r': /* DECSTBM -- Set Scrolling Region */
 785                 if(escseq.priv)
 786                         goto unknown;
 787                 else {
 788                         DEFAULT(escseq.arg[0], 1);
 789                         DEFAULT(escseq.arg[1], term.row);
 790                         tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
 791                 }
 792                 break;
 793         case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
 794                 tcursor(CURSOR_SAVE);
 795                 break;
 796         case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
 797                 tcursor(CURSOR_LOAD);
 798                 break;
 799         }
 800 }
 801
 802 void
 803 csidump(void) {
 804         int i;
 805         printf("ESC [ %s", escseq.priv ? "? " : "");
 806         if(escseq.narg)
 807                 for(i = 0; i < escseq.narg; i++)
 808                         printf("%d ", escseq.arg[i]);
 809         if(escseq.mode)
 810                 putchar(escseq.mode);
 811         putchar('\n');
 812 }
 813
 814 void
 815 csireset(void) {
 816         memset(&escseq, 0, sizeof(escseq));
 817 }
 818
 819 void
 820 tputtab(void) {
 821         int space = TAB - term.c.x % TAB;
 822         tmoveto(term.c.x + space, term.c.y);
 823 }
 824
 825 void
 826 tputc(char c) {
 827         if(term.esc & ESC_START) {
 828                 if(term.esc & ESC_CSI) {
 829                         escseq.buf[escseq.len++] = c;
 830                         if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
 831                                 term.esc = 0;
 832                                 csiparse(), csihandle();
 833                         }
 834                 } else if(term.esc & ESC_OSC) {
 835                         if(c == ';') {
 836                                 term.titlelen = 0;
 837                                 term.esc = ESC_START | ESC_TITLE;
 838                         }
 839                 } else if(term.esc & ESC_TITLE) {
 840                         if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
 841                                 term.esc = 0;
 842                                 term.title[term.titlelen] = '\0';
 843                                 XStoreName(xw.dis, xw.win, term.title);
 844                         } else {
 845                                 term.title[term.titlelen++] = c;
 846                         }
 847                 } else if(term.esc & ESC_ALTCHARSET) {
 848                         switch(c) {
 849                         case '0': /* Line drawing crap */
 850                                 term.c.attr.mode |= ATTR_GFX;
 851                                 break;
 852                         case 'B': /* Back to regular text */
 853                                 term.c.attr.mode &= ~ATTR_GFX;
 854                                 break;
 855                         default:
 856                                 printf("esc unhandled charset: ESC ( %c\n", c);
 857                         }
 858                         term.esc = 0;
 859                 } else {
 860                         switch(c) {
 861                         case '[':
 862                                 term.esc |= ESC_CSI;
 863                                 break;
 864                         case ']':
 865                                 term.esc |= ESC_OSC;
 866                                 break;
 867                         case '(':
 868                                 term.esc |= ESC_ALTCHARSET;
 869                                 break;
 870                         case 'D': /* IND -- Linefeed */
 871                                 if(term.c.y == term.bot)
 872                                         tscrollup(1);
 873                                 else
 874                                         tmoveto(term.c.x, term.c.y+1);
 875                                 term.esc = 0;
 876                                 break;
 877                         case 'E': /* NEL -- Next line */
 878                                 tnewline();
 879                                 term.esc = 0;
 880                                 break;
 881                         case 'M': /* RI -- Reverse index */
 882                                 if(term.c.y == term.top)
 883                                         tscrolldown(1);
 884                                 else
 885                                         tmoveto(term.c.x, term.c.y-1);
 886                                 term.esc = 0;
 887                                 break;
 888                         case 'c': /* RIS -- Reset to inital state */
 889                                 treset();
 890                                 term.esc = 0;
 891                                 break;
 892                         case '=': /* DECPAM */
 893                                 term.mode |= MODE_APPKEYPAD;
 894                                 term.esc = 0;
 895                                 break;
 896                         case '>': /* DECPNM */
 897                                 term.mode &= ~MODE_APPKEYPAD;
 898                                 term.esc = 0;
 899                                 break;
 900                         case '7':
 901                                 tcursor(CURSOR_SAVE);
 902                                 term.esc = 0;
 903                                 break;
 904                         case '8':
 905                                 tcursor(CURSOR_LOAD);
 906                                 term.esc = 0;
 907                                 break;
 908                         default:
 909                                 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
 910                                 term.esc = 0;
 911                         }
 912                 }
 913         } else {
 914                 switch(c) {
 915                 case '\t':
 916                         tputtab();
 917                         break;
 918                 case '\b':
 919                         tmoveto(term.c.x-1, term.c.y);
 920                         break;
 921                 case '\r':
 922                         tmoveto(0, term.c.y);
 923                         break;
 924                 case '\n':
 925                         tnewline();
 926                         break;
 927                 case '\a':
 928                         xbell();
 929                         break;
 930                 case '\033':
 931                         csireset();
 932                         term.esc = ESC_START;
 933                         break;
 934                 default:
 935                         tsetchar(c);
 936                         if(term.c.x+1 < term.col) {
 937                                 tmoveto(term.c.x+1, term.c.y);
 938                         } else if(IS_SET(MODE_WRAP))
 939                                 tnewline();
 940                         break;
 941                 }
 942         }
 943 }
 944
 945 void
 946 tputs(char *s, int len) {
 947         for(; len > 0; len--)
 948                 tputc(*s++);
 949 }
 950
 951 void
 952 tresize(int col, int row) {
 953         int i;
 954         int minrow = MIN(row, term.row);
 955         int mincol = MIN(col, term.col);
 956
 957         if(col < 1 || row < 1)
 958                 return;
 959
 960         /* free uneeded rows */
 961         for(i = row; i < term.row; i++)
 962                 free(term.line[i]);
 963
 964         /* resize to new height */
 965         term.line = realloc(term.line, row * sizeof(Line));
 966
 967         /* resize each row to new width, zero-pad if needed */
 968         for(i = 0; i < minrow; i++) {
 969                 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
 970                 memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
 971         }
 972
 973         /* allocate any new rows */
 974         for(/* i == minrow */; i < row; i++)
 975                 term.line[i] = calloc(col, sizeof(Glyph));
 976
 977         LIMIT(term.c.x, 0, col-1);
 978         LIMIT(term.c.y, 0, row-1);
 979         LIMIT(term.top, 0, row-1);
 980         LIMIT(term.bot, 0, row-1);
 981
 982         term.bot = row-1;
 983         term.col = col, term.row = row;
 984 }
 985
 986 void
 987 xloadcols(void) {
 988         int i, r, g, b;
 989         XColor color;
 990         Colormap cmap = DefaultColormap(xw.dis, xw.scr);
 991         unsigned long white = WhitePixel(xw.dis, xw.scr);
 992
 993         for(i = 0; i < 16; i++) {
 994                 if (!XAllocNamedColor(xw.dis, cmap, colorname[i], &color, &color)) {
 995                         dc.col[i] = white;
 996                         fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
 997                 } else
 998                         dc.col[i] = color.pixel;
 999         }
1000
1001         /* same colors as xterm */
1002         for(r = 0; r < 6; r++)
1003                 for(g = 0; g < 6; g++)
1004                         for(b = 0; b < 6; b++) {
1005                                 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1006                                 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1007                                 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1008                                 if (!XAllocColor(xw.dis, cmap, &color)) {
1009                                         dc.col[i] = white;
1010                                         fprintf(stderr, "Could not allocate color %d\n", i);
1011                                 } else
1012                                         dc.col[i] = color.pixel;
1013                                 i++;
1014                         }
1015
1016         for(r = 0; r < 24; r++, i++) {
1017                 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1018                 if (!XAllocColor(xw.dis, cmap, &color)) {
1019                         dc.col[i] = white;
1020                         fprintf(stderr, "Could not allocate color %d\n", i);
1021                 } else
1022                         dc.col[i] = color.pixel;
1023         }
1024 }
1025
1026 void
1027 xclear(int x1, int y1, int x2, int y2) {
1028         XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1029         XFillRectangle(xw.dis, xw.buf, dc.gc,
1030                        x1 * xw.cw, y1 * xw.ch,
1031                        (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1032 }
1033
1034 void
1035 xhints(void)
1036 {
1037         XClassHint class = {TNAME, TNAME};
1038         XWMHints wm = {.flags = InputHint, .input = 1};
1039         XSizeHints size = {
1040                 .flags = PSize | PResizeInc | PBaseSize,
1041                 .height = xw.h,
1042                 .width = xw.w,
1043                 .height_inc = xw.ch,
1044                 .width_inc = xw.cw,
1045                 .base_height = 2*BORDER,
1046                 .base_width = 2*BORDER,
1047         };
1048         XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1049 }
1050
1051 void
1052 xinit(void) {
1053         if(!(xw.dis = XOpenDisplay(NULL)))
1054                 die("Can't open display\n");
1055         xw.scr = XDefaultScreen(xw.dis);
1056
1057         /* font */
1058         if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1059                 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1060
1061         /* XXX: Assuming same size for bold font */
1062         xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1063         xw.ch = dc.font->ascent + dc.font->descent;
1064
1065         /* colors */
1066         xloadcols();
1067
1068         term.c.attr.fg = DefaultFG;
1069         term.c.attr.bg = DefaultBG;
1070         term.c.attr.mode = ATTR_NULL;
1071         /* windows */
1072         xw.h = term.row * xw.ch + 2*BORDER;
1073         xw.w = term.col * xw.cw + 2*BORDER;
1074         xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1075                         xw.w, xw.h, 0,
1076                         dc.col[DefaultBG],
1077                         dc.col[DefaultBG]);
1078         xw.bufw = xw.w - 2*BORDER;
1079         xw.bufh = xw.h - 2*BORDER;
1080         xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1081         /* gc */
1082         dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1083         XMapWindow(xw.dis, xw.win);
1084         xhints();
1085         XStoreName(xw.dis, xw.win, "st");
1086         XSync(xw.dis, 0);
1087 }
1088
1089 void
1090 xdraws(char *s, Glyph base, int x, int y, int len) {
1091         unsigned long xfg, xbg;
1092         int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1093         int i;
1094
1095         if(base.mode & ATTR_REVERSE)
1096                 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1097         else
1098                 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1099
1100         XSetBackground(xw.dis, dc.gc, xbg);
1101         XSetForeground(xw.dis, dc.gc, xfg);
1102
1103         if(base.mode & ATTR_GFX)
1104                 for(i = 0; i < len; i++)
1105                         s[i] = gfx[(int)s[i]];
1106
1107         XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1108         XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1109
1110         if(base.mode & ATTR_UNDERLINE)
1111                 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1112 }
1113
1114 void
1115 xcursor(int mode) {
1116         static int oldx = 0;
1117         static int oldy = 0;
1118         Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1119
1120         LIMIT(oldx, 0, term.col-1);
1121         LIMIT(oldy, 0, term.row-1);
1122
1123         if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1124                 g.c = term.line[term.c.y][term.c.x].c;
1125
1126         /* remove the old cursor */
1127         if(term.line[oldy][oldx].state & GLYPH_SET)
1128                 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1129         else
1130                 xclear(oldx, oldy, oldx, oldy);
1131
1132         /* draw the new one */
1133         if(mode == CURSOR_DRAW) {
1134                 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1135                 oldx = term.c.x, oldy = term.c.y;
1136         }
1137 }
1138
1139 #ifdef DEBUG
1140 /* basic drawing routines */
1141 void
1142 xdrawc(int x, int y, Glyph g) {
1143         XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1144         XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1145         XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1146         XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1147         XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1148 }
1149
1150 void
1151 draw(int dummy) {
1152         int x, y;
1153
1154         xclear(0, 0, term.col-1, term.row-1);
1155         for(y = 0; y < term.row; y++)
1156                 for(x = 0; x < term.col; x++)
1157                         if(term.line[y][x].state & GLYPH_SET)
1158                                 xdrawc(x, y, term.line[y][x]);
1159
1160         xcursor(term.c.hide);
1161         XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1162         XFlush(xw.dis);
1163 }
1164
1165 #else
1166 /* optimized drawing routine */
1167 void
1168 draw(int redraw_all) {
1169         int i, x, y, ox;
1170         Glyph base, new;
1171         char buf[DRAW_BUF_SIZ];
1172
1173         XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1174         XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.bufw, xw.bufh);
1175         for(y = 0; y < term.row; y++) {
1176                 base = term.line[y][0];
1177                 i = ox = 0;
1178                 for(x = 0; x < term.col; x++) {
1179                         new = term.line[y][x];
1180                         if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1181                                                 i >= DRAW_BUF_SIZ)) {
1182                                 xdraws(buf, base, ox, y, i);
1183                                 i = 0;
1184                         }
1185                         if(new.state & GLYPH_SET) {
1186                                 if(i == 0) {
1187                                         ox = x;
1188                                         base = new;
1189                                 }
1190                                 buf[i++] = new.c;
1191                         }
1192                 }
1193                 if(i > 0)
1194                         xdraws(buf, base, ox, y, i);
1195         }
1196         xcursor(term.c.hide);
1197         XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1198         XFlush(xw.dis);
1199 }
1200
1201 #endif
1202
1203 void
1204 expose(XEvent *ev) {
1205         draw(SCREEN_REDRAW);
1206 }
1207
1208 char*
1209 kmap(KeySym k) {
1210         int i;
1211         for(i = 0; i < LEN(key); i++)
1212                 if(key[i].k == k)
1213                         return (char*)key[i].s;
1214         return NULL;
1215 }
1216
1217 void
1218 kpress(XEvent *ev) {
1219         XKeyEvent *e = &ev->xkey;
1220         KeySym ksym;
1221         char buf[32];
1222         char *customkey;
1223         int len;
1224         int meta;
1225         int shift;
1226
1227         meta = e->state & Mod1Mask;
1228         shift = e->state & ShiftMask;
1229         len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
1230
1231         if((customkey = kmap(ksym)))
1232                 ttywrite(customkey, strlen(customkey));
1233         else if(len > 0) {
1234                 buf[sizeof(buf)-1] = '\0';
1235                 if(meta && len == 1)
1236                         ttywrite("\033", 1);
1237                 ttywrite(buf, len);
1238         } else
1239                 switch(ksym) {
1240                 case XK_Up:
1241                 case XK_Down:
1242                 case XK_Left:
1243                 case XK_Right:
1244                         sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1245                         ttywrite(buf, 3);
1246                         break;
1247                 case XK_Insert:
1248                         if(shift)
1249                                 draw(1), puts("draw!")/* XXX: paste X clipboard */;
1250                         break;
1251                 default:
1252                         fprintf(stderr, "errkey: %d\n", (int)ksym);
1253                         break;
1254                 }
1255 }
1256
1257 void
1258 resize(XEvent *e) {
1259         int col, row;
1260
1261         if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1262                 return;
1263
1264         xw.w = e->xconfigure.width;
1265         xw.h = e->xconfigure.height;
1266         xw.bufw = xw.w - 2*BORDER;
1267         xw.bufh = xw.h - 2*BORDER;
1268         col = xw.bufw / xw.cw;
1269         row = xw.bufh / xw.ch;
1270         tresize(col, row);
1271         ttyresize(col, row);
1272         XFreePixmap(xw.dis, xw.buf);
1273         xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1274         draw(SCREEN_REDRAW);
1275 }
1276
1277 void
1278 run(void) {
1279         XEvent ev;
1280         fd_set rfd;
1281         int xfd = XConnectionNumber(xw.dis);
1282
1283         running = 1;
1284         XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
1285         XResizeWindow(xw.dis, xw.win, xw.w, xw.h); /* XXX: fix resize bug in wmii (?) */
1286
1287         while(running) {
1288                 FD_ZERO(&rfd);
1289                 FD_SET(cmdfd, &rfd);
1290                 FD_SET(xfd, &rfd);
1291                 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1292                         if(errno == EINTR)
1293                                 continue;
1294                         die("select failed: %s\n", SERRNO);
1295                 }
1296                 if(FD_ISSET(cmdfd, &rfd)) {
1297                         ttyread();
1298                         draw(SCREEN_UPDATE);
1299                 }
1300                 while(XPending(xw.dis)) {
1301                         XNextEvent(xw.dis, &ev);
1302                         if(handler[ev.type])
1303                                 (handler[ev.type])(&ev);
1304                 }
1305         }
1306 }
1307
1308 int
1309 main(int argc, char *argv[]) {
1310         if(argc == 2 && !strncmp("-v", argv[1], 3))
1311                 die("st-" VERSION ", (c) 2010 st engineers\n");
1312         else if(argc != 1)
1313                 die("usage: st [-v]\n");
1314         setlocale(LC_CTYPE, "");
1315         tnew(80, 24);
1316         ttynew();
1317         xinit();
1318         run();
1319         return 0;
1320 }