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 <pty.h>
  20 #include <X11/Xlib.h>
  21 #include <X11/keysym.h>
  22 #include <X11/Xutil.h>
  23
  24 #if   defined(LINUX)
  25  #include <pty.h>
  26 #elif defined(OPENBSD)
  27  #include <util.h>
  28 #elif defined(FREEBSD)
  29  #include <libutil.h>
  30 #endif
  31
  32 /* Arbitrary sizes */
  33 #define ESC_TITLE_SIZ 256
  34 #define ESC_BUF_SIZ   256
  35 #define ESC_ARG_SIZ   16
  36 #define DRAW_BUF_SIZ  1024
  37
  38 #define SERRNO strerror(errno)
  39 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
  40 #define MAX(a, b)  ((a) < (b) ? (b) : (a))
  41 #define LEN(a)     (sizeof(a) / sizeof(a[0]))
  42 #define DEFAULT(a, b)     (a) = (a) ? (a) : (b)
  43 #define BETWEEN(x, a, b)  ((a) <= (x) && (x) <= (b))
  44 #define LIMIT(x, a, b)    (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  45 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  46 #define IS_SET(flag) (term.mode & (flag))
  47
  48 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
  49 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
  50 enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT, CURSOR_HIDE = 1,
  51        CURSOR_DRAW = 0, CURSOR_SAVE, CURSOR_LOAD };
  52 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
  53 enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4 };
  54 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
  55 enum { SCREEN_UPDATE, SCREEN_REDRAW };
  56
  57 typedef struct {
  58         char c;     /* character code  */
  59         char mode;  /* attribute flags */
  60         int fg;     /* foreground      */
  61         int bg;     /* background      */
  62         char state; /* state flags     */
  63 } Glyph;
  64
  65 typedef Glyph* Line;
  66
  67 typedef struct {
  68         Glyph attr;      /* current char attributes */
  69         int x;
  70         int y;
  71         char hide;
  72 } TCursor;
  73
  74 /* CSI Escape sequence structs */
  75 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
  76 typedef struct {
  77         char buf[ESC_BUF_SIZ]; /* raw string */
  78         int len;                           /* raw string length */
  79         char priv;
  80         int arg[ESC_ARG_SIZ];
  81         int narg;                          /* nb of args */
  82         char mode;
  83 } CSIEscape;
  84
  85 /* Internal representation of the screen */
  86 typedef struct {
  87         int row;        /* nb row */
  88         int col;        /* nb col */
  89         Line* line; /* screen */
  90         TCursor c;      /* cursor */
  91         int top;        /* top    scroll limit */
  92         int bot;        /* bottom scroll limit */
  93         int mode;       /* terminal mode flags */
  94         int esc;        /* escape state flags */
  95         char title[ESC_TITLE_SIZ];
  96         int titlelen;
  97 } Term;
  98
  99 /* Purely graphic info */
 100 typedef struct {
 101         Display* dis;
 102         Window win;
 103         Pixmap buf;
 104         int scr;
 105         int w;  /* window width  */
 106         int h;  /* window height */
 107         int bufw; /* pixmap width  */
 108         int bufh; /* pixmap height */
 109         int ch; /* char height */
 110         int cw; /* char width  */
 111 } XWindow;
 112
 113 typedef struct {
 114         KeySym k;
 115         char s[ESC_BUF_SIZ];
 116 } Key;
 117
 118 /* Drawing Context */
 119 typedef struct {
 120         unsigned long col[256];
 121         XFontStruct* font;
 122         XFontStruct* bfont;
 123         GC gc;
 124 } DC;
 125
 126 #include "config.h"
 127
 128 static void die(const char *errstr, ...);
 129 static void draw(int);
 130 static void execsh(void);
 131 static void sigchld(int);
 132 static void run(void);
 133
 134 static void csidump(void);
 135 static void csihandle(void);
 136 static void csiparse(void);
 137 static void csireset(void);
 138
 139 static void tclearregion(int, int, int, int);
 140 static void tcursor(int);
 141 static void tdeletechar(int);
 142 static void tdeleteline(int);
 143 static void tinsertblank(int);
 144 static void tinsertblankline(int);
 145 static void tmoveto(int, int);
 146 static void tnew(int, int);
 147 static void tnewline(void);
 148 static void tputtab(void);
 149 static void tputc(char);
 150 static void tputs(char*, int);
 151 static void treset(void);
 152 static void tresize(int, int);
 153 static void tscrollup(int);
 154 static void tscrolldown(int);
 155 static void tsetattr(int*, int);
 156 static void tsetchar(char);
 157 static void tsetscroll(int, int);
 158
 159 static void ttynew(void);
 160 static void ttyread(void);
 161 static void ttyresize(int, int);
 162 static void ttywrite(const char *, size_t);
 163
 164 static void xbell(void);
 165 static void xdraws(char *, Glyph, int, int, int);
 166 static void xhints(void);
 167 static void xclear(int, int, int, int);
 168 static void xcursor(int);
 169 static void xinit(void);
 170 static void xloadcols(void);
 171
 172 static void expose(XEvent *);
 173 static char* kmap(KeySym);
 174 static void kpress(XEvent *);
 175 static void resize(XEvent *);
 176
 177 static void (*handler[LASTEvent])(XEvent *) = {
 178         [KeyPress] = kpress,
 179         [Expose] = expose,
 180         [ConfigureNotify] = resize
 181 };
 182
 183 /* Globals */
 184 static DC dc;
 185 static XWindow xw;
 186 static Term term;
 187 static CSIEscape escseq;
 188 static int cmdfd;
 189 static pid_t pid;
 190 static int running;
 191
 192 #ifdef DEBUG
 193 void
 194 tdump(void) {
 195         int row, col;
 196         Glyph c;
 197
 198         for(row = 0; row < term.row; row++) {
 199                 for(col = 0; col < term.col; col++) {
 200                         if(col == term.c.x && row == term.c.y)
 201                                 putchar('#');
 202                         else {
 203                                 c = term.line[row][col];
 204                                 putchar(c.state & GLYPH_SET ? c.c : '.');
 205                         }
 206                 }
 207                 putchar('\n');
 208         }
 209 }
 210 #endif
 211
 212 void
 213 die(const char *errstr, ...) {
 214         va_list ap;
 215
 216         va_start(ap, errstr);
 217         vfprintf(stderr, errstr, ap);
 218         va_end(ap);
 219         exit(EXIT_FAILURE);
 220 }
 221
 222 void
 223 execsh(void) {
 224         char *args[3] = {getenv("SHELL"), "-i", NULL};
 225         DEFAULT(args[0], "/bin/sh"); /* if getenv() failed */
 226         putenv("TERM=" TNAME);
 227         execvp(args[0], args);
 228 }
 229
 230 void
 231 xbell(void) {
 232         XSetForeground(xw.dis, dc.gc, dc.col[BellCol]);
 233         XFillRectangle(xw.dis, xw.win, dc.gc, BORDER, BORDER, xw.bufw, xw.bufh);
 234         XFlush(xw.dis);
 235         usleep(BellTime);
 236         draw(SCREEN_REDRAW);
 237 }
 238
 239 void
 240 sigchld(int a) {
 241         int stat = 0;
 242         if(waitpid(pid, &stat, 0) < 0)
 243                 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
 244         if(WIFEXITED(stat))
 245                 exit(WEXITSTATUS(stat));
 246         else
 247                 exit(EXIT_FAILURE);
 248 }
 249
 250 void
 251 ttynew(void) {
 252         int m, s;
 253
 254         /* seems to work fine on linux, openbsd and freebsd */
 255         struct winsize w = {term.row, term.col, 0, 0};
 256         if(openpty(&m, &s, NULL, NULL, &w) < 0)
 257                 die("openpty failed: %s\n", SERRNO);
 258
 259         switch(pid = fork()) {
 260         case -1:
 261                 die("fork failed\n");
 262                 break;
 263         case 0:
 264                 setsid(); /* create a new process group */
 265                 dup2(s, STDIN_FILENO);
 266                 dup2(s, STDOUT_FILENO);
 267                 dup2(s, STDERR_FILENO);
 268                 if(ioctl(s, TIOCSCTTY, NULL) < 0)
 269                         die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
 270                 close(s);
 271                 close(m);
 272                 execsh();
 273                 break;
 274         default:
 275                 close(s);
 276                 cmdfd = m;
 277                 signal(SIGCHLD, sigchld);
 278         }
 279 }
 280
 281 void
 282 dump(char c) {
 283         static int col;
 284         fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
 285         if(++col % 10 == 0)
 286                 fprintf(stderr, "\n");
 287 }
 288
 289 void
 290 ttyread(void) {
 291         char buf[BUFSIZ] = {0};
 292         int ret;
 293
 294         if((ret = read(cmdfd, buf, BUFSIZ)) < 0)
 295                 die("Couldn't read from shell: %s\n", SERRNO);
 296         else
 297                 tputs(buf, ret);
 298 }
 299
 300 void
 301 ttywrite(const char *s, size_t n) {
 302         if(write(cmdfd, s, n) == -1)
 303                 die("write error on tty: %s\n", SERRNO);
 304 }
 305
 306 void
 307 ttyresize(int x, int y) {
 308         struct winsize w;
 309
 310         w.ws_row = term.row;
 311         w.ws_col = term.col;
 312         w.ws_xpixel = w.ws_ypixel = 0;
 313         if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
 314                 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
 315 }
 316
 317 void
 318 tcursor(int mode) {
 319         static TCursor c;
 320
 321         if(mode == CURSOR_SAVE)
 322                 c = term.c;
 323         else if(mode == CURSOR_LOAD)
 324                 term.c = c, tmoveto(c.x, c.y);
 325 }
 326
 327 void
 328 treset(void) {
 329         term.c = (TCursor){{
 330                 .mode = ATTR_NULL,
 331                 .fg = DefaultFG,
 332                 .bg = DefaultBG
 333         }, .x = 0, .y = 0, .hide = 0};
 334
 335         term.top = 0, term.bot = term.row - 1;
 336         term.mode = MODE_WRAP;
 337         tclearregion(0, 0, term.col-1, term.row-1);
 338 }
 339
 340 void
 341 tnew(int col, int row) {
 342         /* set screen size */
 343         term.row = row, term.col = col;
 344         term.line = malloc(term.row * sizeof(Line));
 345         for(row = 0 ; row < term.row; row++)
 346                 term.line[row] = malloc(term.col * sizeof(Glyph));
 347         /* setup screen */
 348         treset();
 349 }
 350
 351 void
 352 tscrolldown (int n) {
 353         int i;
 354         Line temp;
 355
 356         LIMIT(n, 0, term.bot-term.top+1);
 357
 358         for(i = 0; i < n; i++)
 359                 memset(term.line[term.bot-i], 0, term.col*sizeof(Glyph));
 360
 361         for(i = term.bot; i >= term.top+n; i--) {
 362                 temp = term.line[i];
 363                 term.line[i] = term.line[i-n];
 364                 term.line[i-n] = temp;
 365         }
 366 }
 367
 368 void
 369 tscrollup (int n) {
 370         int i;
 371         Line temp;
 372         LIMIT(n, 0, term.bot-term.top+1);
 373
 374         for(i = 0; i < n; i++)
 375                 memset(term.line[term.top+i], 0, term.col*sizeof(Glyph));
 376
 377         for(i = term.top; i <= term.bot-n; i++) {
 378                  temp = term.line[i];
 379                  term.line[i] = term.line[i+n];
 380                  term.line[i+n] = temp;
 381         }
 382 }
 383
 384 void
 385 tnewline(void) {
 386         int y = term.c.y + 1;
 387         if(y > term.bot)
 388                 tscrollup(1), y = term.bot;
 389         tmoveto(0, y);
 390 }
 391
 392 void
 393 csiparse(void) {
 394         /* int noarg = 1; */
 395         char *p = escseq.buf;
 396
 397         escseq.narg = 0;
 398         if(*p == '?')
 399                 escseq.priv = 1, p++;
 400
 401         while(p < escseq.buf+escseq.len) {
 402                 while(isdigit(*p)) {
 403                         escseq.arg[escseq.narg] *= 10;
 404                         escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
 405                 }
 406                 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
 407                         escseq.narg++, p++;
 408                 else {
 409                         escseq.mode = *p;
 410                         escseq.narg++;
 411                         return;
 412                 }
 413         }
 414 }
 415
 416 void
 417 tmoveto(int x, int y) {
 418         term.c.x = x < 0 ? 0 : x >= term.col ? term.col-1 : x;
 419         term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y;
 420 }
 421
 422 void
 423 tsetchar(char c) {
 424         term.line[term.c.y][term.c.x] = term.c.attr;
 425         term.line[term.c.y][term.c.x].c = c;
 426         term.line[term.c.y][term.c.x].state |= GLYPH_SET;
 427 }
 428
 429 void
 430 tclearregion(int x1, int y1, int x2, int y2) {
 431         int y, temp;
 432
 433         if(x1 > x2)
 434                 temp = x1, x1 = x2, x2 = temp;
 435         if(y1 > y2)
 436                 temp = y1, y1 = y2, y2 = temp;
 437
 438         LIMIT(x1, 0, term.col-1);
 439         LIMIT(x2, 0, term.col-1);
 440         LIMIT(y1, 0, term.row-1);
 441         LIMIT(y2, 0, term.row-1);
 442
 443         for(y = y1; y <= y2; y++)
 444                 memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1));
 445 }
 446
 447 void
 448 tdeletechar(int n) {
 449         int src = term.c.x + n;
 450         int dst = term.c.x;
 451         int size = term.col - src;
 452
 453         if(src >= term.col) {
 454                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 455                 return;
 456         }
 457         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 458         tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
 459 }
 460
 461 void
 462 tinsertblank(int n) {
 463         int src = term.c.x;
 464         int dst = src + n;
 465         int size = term.col - dst;
 466
 467         if(dst >= term.col) {
 468                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 469                 return;
 470         }
 471         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 472         tclearregion(src, term.c.y, dst - 1, term.c.y);
 473 }
 474
 475 void
 476 tinsertblankline(int n) {
 477         int i;
 478         Line blank;
 479         int bot = term.bot;
 480
 481         if(term.c.y > term.bot)
 482                 bot = term.row - 1;
 483         else if(term.c.y < term.top)
 484                 bot = term.top - 1;
 485         if(term.c.y + n >= bot) {
 486                 tclearregion(0, term.c.y, term.col-1, bot);
 487                 return;
 488         }
 489         for(i = bot; i >= term.c.y+n; i--) {
 490                 /* swap deleted line <-> blanked line */
 491                 blank = term.line[i];
 492                 term.line[i] = term.line[i-n];
 493                 term.line[i-n] = blank;
 494                 /* blank it */
 495                 memset(blank, 0, term.col * sizeof(Glyph));
 496         }
 497 }
 498
 499 void
 500 tdeleteline(int n) {
 501         int i;
 502         Line blank;
 503         int bot = term.bot;
 504
 505         if(term.c.y > term.bot)
 506                 bot = term.row - 1;
 507         else if(term.c.y < term.top)
 508                 bot = term.top - 1;
 509         if(term.c.y + n >= bot) {
 510                 tclearregion(0, term.c.y, term.col-1, bot);
 511                 return;
 512         }
 513         for(i = term.c.y; i <= bot-n; i++) {
 514                 /* swap deleted line <-> blanked line */
 515                 blank = term.line[i];
 516                 term.line[i] = term.line[i+n];
 517                 term.line[i+n] = blank;
 518                 /* blank it */
 519                 memset(blank, 0, term.col * sizeof(Glyph));
 520         }
 521 }
 522
 523 void
 524 tsetattr(int *attr, int l) {
 525         int i;
 526
 527         for(i = 0; i < l; i++) {
 528                 switch(attr[i]) {
 529                 case 0:
 530                         term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
 531                         term.c.attr.fg = DefaultFG;
 532                         term.c.attr.bg = DefaultBG;
 533                         break;
 534                 case 1:
 535                         term.c.attr.mode |= ATTR_BOLD;
 536                         break;
 537                 case 4:
 538                         term.c.attr.mode |= ATTR_UNDERLINE;
 539                         break;
 540                 case 7:
 541                         term.c.attr.mode |= ATTR_REVERSE;
 542                         break;
 543                 case 22:
 544                         term.c.attr.mode &= ~ATTR_BOLD;
 545                         break;
 546                 case 24:
 547                         term.c.attr.mode &= ~ATTR_UNDERLINE;
 548                         break;
 549                 case 27:
 550                         term.c.attr.mode &= ~ATTR_REVERSE;
 551                         break;
 552                 case 38:
 553                         if (i + 2 < l && attr[i + 1] == 5) {
 554                                 i += 2;
 555                                 if (BETWEEN(attr[i], 0, 255))
 556                                         term.c.attr.fg = attr[i];
 557                                 else
 558                                         fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
 559                         }
 560                         else
 561                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 562                         break;
 563                 case 39:
 564                         term.c.attr.fg = DefaultFG;
 565                         break;
 566                 case 48:
 567                         if (i + 2 < l && attr[i + 1] == 5) {
 568                                 i += 2;
 569                                 if (BETWEEN(attr[i], 0, 255))
 570                                         term.c.attr.bg = attr[i];
 571                                 else
 572                                         fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
 573                         }
 574                         else
 575                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 576                         break;
 577                 case 49:
 578                         term.c.attr.bg = DefaultBG;
 579                         break;
 580                 default:
 581                         if(BETWEEN(attr[i], 30, 37))
 582                                 term.c.attr.fg = attr[i] - 30;
 583                         else if(BETWEEN(attr[i], 40, 47))
 584                                 term.c.attr.bg = attr[i] - 40;
 585                         else if(BETWEEN(attr[i], 90, 97))
 586                                 term.c.attr.fg = attr[i] - 90 + 8;
 587                         else if(BETWEEN(attr[i], 100, 107))
 588                                 term.c.attr.fg = attr[i] - 100 + 8;
 589                         else
 590                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 591                         break;
 592                 }
 593         }
 594 }
 595
 596 void
 597 tsetscroll(int t, int b) {
 598         int temp;
 599
 600         LIMIT(t, 0, term.row-1);
 601         LIMIT(b, 0, term.row-1);
 602         if(t > b) {
 603                 temp = t;
 604                 t = b;
 605                 b = temp;
 606         }
 607         term.top = t;
 608         term.bot = b;
 609 }
 610
 611 void
 612 csihandle(void) {
 613         switch(escseq.mode) {
 614         default:
 615         unknown:
 616                 printf("erresc: unknown csi ");
 617                 csidump();
 618                 /* die(""); */
 619                 break;
 620         case '@': /* ICH -- Insert <n> blank char */
 621                 DEFAULT(escseq.arg[0], 1);
 622                 tinsertblank(escseq.arg[0]);
 623                 break;
 624         case 'A': /* CUU -- Cursor <n> Up */
 625         case 'e':
 626                 DEFAULT(escseq.arg[0], 1);
 627                 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
 628                 break;
 629         case 'B': /* CUD -- Cursor <n> Down */
 630                 DEFAULT(escseq.arg[0], 1);
 631                 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
 632                 break;
 633         case 'C': /* CUF -- Cursor <n> Forward */
 634         case 'a':
 635                 DEFAULT(escseq.arg[0], 1);
 636                 tmoveto(term.c.x+escseq.arg[0], term.c.y);
 637                 break;
 638         case 'D': /* CUB -- Cursor <n> Backward */
 639                 DEFAULT(escseq.arg[0], 1);
 640                 tmoveto(term.c.x-escseq.arg[0], term.c.y);
 641                 break;
 642         case 'E': /* CNL -- Cursor <n> Down and first col */
 643                 DEFAULT(escseq.arg[0], 1);
 644                 tmoveto(0, term.c.y+escseq.arg[0]);
 645                 break;
 646         case 'F': /* CPL -- Cursor <n> Up and first col */
 647                 DEFAULT(escseq.arg[0], 1);
 648                 tmoveto(0, term.c.y-escseq.arg[0]);
 649                 break;
 650         case 'G': /* CHA -- Move to <col> */
 651         case '`': /* XXX: HPA -- same? */
 652                 DEFAULT(escseq.arg[0], 1);
 653                 tmoveto(escseq.arg[0]-1, term.c.y);
 654                 break;
 655         case 'H': /* CUP -- Move to <row> <col> */
 656         case 'f': /* XXX: HVP -- same? */
 657                 DEFAULT(escseq.arg[0], 1);
 658                 DEFAULT(escseq.arg[1], 1);
 659                 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
 660                 break;
 661         /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
 662         case 'J': /* ED -- Clear screen */
 663                 switch(escseq.arg[0]) {
 664                 case 0: /* below */
 665                         tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
 666                         break;
 667                 case 1: /* above */
 668                         tclearregion(0, 0, term.c.x, term.c.y);
 669                         break;
 670                 case 2: /* all */
 671                         tclearregion(0, 0, term.col-1, term.row-1);
 672                         break;
 673                 case 3: /* XXX: erase saved lines (xterm) */
 674                 default:
 675                         goto unknown;
 676                 }
 677                 break;
 678         case 'K': /* EL -- Clear line */
 679                 switch(escseq.arg[0]) {
 680                 case 0: /* right */
 681                         tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 682                         break;
 683                 case 1: /* left */
 684                         tclearregion(0, term.c.y, term.c.x, term.c.y);
 685                         break;
 686                 case 2: /* all */
 687                         tclearregion(0, term.c.y, term.col-1, term.c.y);
 688                         break;
 689                 }
 690                 break;
 691         case 'S': /* SU -- Scroll <n> line up */
 692                 DEFAULT(escseq.arg[0], 1);
 693                 tscrollup(escseq.arg[0]);
 694                 break;
 695         case 'T': /* SD -- Scroll <n> line down */
 696                 DEFAULT(escseq.arg[0], 1);
 697                 tscrolldown(escseq.arg[0]);
 698                 break;
 699         case 'L': /* IL -- Insert <n> blank lines */
 700                 DEFAULT(escseq.arg[0], 1);
 701                 tinsertblankline(escseq.arg[0]);
 702                 break;
 703         case 'l': /* RM -- Reset Mode */
 704                 if(escseq.priv) {
 705                         switch(escseq.arg[0]) {
 706                         case 1:
 707                                 term.mode &= ~MODE_APPKEYPAD;
 708                                 break;
 709                         case 7:
 710                                 term.mode &= ~MODE_WRAP;
 711                                 break;
 712                         case 12: /* att610 -- Stop blinking cursor (IGNORED) */
 713                                 break;
 714                         case 25:
 715                                 term.c.hide = CURSOR_HIDE;
 716                                 break;
 717                         case 1048: /* XXX: no alt. screen to erase/save */
 718                         case 1049:
 719                                 tcursor(CURSOR_LOAD);
 720                                 tclearregion(0, 0, term.col-1, term.row-1);
 721                                 break;
 722                         default:
 723                                 goto unknown;
 724                         }
 725                 } else {
 726                         switch(escseq.arg[0]) {
 727                         case 4:
 728                                 term.mode &= ~MODE_INSERT;
 729                                 break;
 730                         default:
 731                                 goto unknown;
 732                         }
 733                 }
 734                 break;
 735         case 'M': /* DL -- Delete <n> lines */
 736                 DEFAULT(escseq.arg[0], 1);
 737                 tdeleteline(escseq.arg[0]);
 738                 break;
 739         case 'X': /* ECH -- Erase <n> char */
 740                 DEFAULT(escseq.arg[0], 1);
 741                 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
 742                 break;
 743         case 'P': /* DCH -- Delete <n> char */
 744                 DEFAULT(escseq.arg[0], 1);
 745                 tdeletechar(escseq.arg[0]);
 746                 break;
 747         /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
 748         case 'd': /* VPA -- Move to <row> */
 749                 DEFAULT(escseq.arg[0], 1);
 750                 tmoveto(term.c.x, escseq.arg[0]-1);
 751                 break;
 752         case 'h': /* SM -- Set terminal mode */
 753                 if(escseq.priv) {
 754                         switch(escseq.arg[0]) {
 755                         case 1:
 756                                 term.mode |= MODE_APPKEYPAD;
 757                                 break;
 758                         case 7:
 759                                 term.mode |= MODE_WRAP;
 760                                 break;
 761                         case 12: /* att610 -- Start blinking cursor (IGNORED) */
 762                                 break;
 763                         case 25:
 764                                 term.c.hide = CURSOR_DRAW;
 765                                 break;
 766                         case 1048:
 767                         case 1049: /* XXX: no alt. screen to erase/save */
 768                                 tcursor(CURSOR_SAVE);
 769                                 tclearregion(0, 0, term.col-1, term.row-1);
 770                                 break;
 771                         default: goto unknown;
 772                         }
 773                 } else {
 774                         switch(escseq.arg[0]) {
 775                         case 4:
 776                                 term.mode |= MODE_INSERT;
 777                                 break;
 778                         default: goto unknown;
 779                         }
 780                 };
 781                 break;
 782         case 'm': /* SGR -- Terminal attribute (color) */
 783                 tsetattr(escseq.arg, escseq.narg);
 784                 break;
 785         case 'r': /* DECSTBM -- Set Scrolling Region */
 786                 if(escseq.priv)
 787                         goto unknown;
 788                 else {
 789                         DEFAULT(escseq.arg[0], 1);
 790                         DEFAULT(escseq.arg[1], term.row);
 791                         tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
 792                 }
 793                 break;
 794         case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
 795                 tcursor(CURSOR_SAVE);
 796                 break;
 797         case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
 798                 tcursor(CURSOR_LOAD);
 799                 break;
 800         }
 801 }
 802
 803 void
 804 csidump(void) {
 805         int i;
 806         printf("ESC [ %s", escseq.priv ? "? " : "");
 807         if(escseq.narg)
 808                 for(i = 0; i < escseq.narg; i++)
 809                         printf("%d ", escseq.arg[i]);
 810         if(escseq.mode)
 811                 putchar(escseq.mode);
 812         putchar('\n');
 813 }
 814
 815 void
 816 csireset(void) {
 817         memset(&escseq, 0, sizeof(escseq));
 818 }
 819
 820 void
 821 tputtab(void) {
 822         int space = TAB - term.c.x % TAB;
 823         tmoveto(term.c.x + space, term.c.y);
 824 }
 825
 826 void
 827 tputc(char c) {
 828         if(term.esc & ESC_START) {
 829                 if(term.esc & ESC_CSI) {
 830                         escseq.buf[escseq.len++] = c;
 831                         if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
 832                                 term.esc = 0;
 833                                 csiparse(), csihandle();
 834                         }
 835                 } else if(term.esc & ESC_OSC) {
 836                         if(c == ';') {
 837                                 term.titlelen = 0;
 838                                 term.esc = ESC_START | ESC_TITLE;
 839                         }
 840                 } else if(term.esc & ESC_TITLE) {
 841                         if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
 842                                 term.esc = 0;
 843                                 term.title[term.titlelen] = '\0';
 844                                 XStoreName(xw.dis, xw.win, term.title);
 845                         } else {
 846                                 term.title[term.titlelen++] = c;
 847                         }
 848                 } else if(term.esc & ESC_ALTCHARSET) {
 849                         switch(c) {
 850                         case '0': /* Line drawing crap */
 851                                 term.c.attr.mode |= ATTR_GFX;
 852                                 break;
 853                         case 'B': /* Back to regular text */
 854                                 term.c.attr.mode &= ~ATTR_GFX;
 855                                 break;
 856                         default:
 857                                 printf("esc unhandled charset: ESC ( %c\n", c);
 858                         }
 859                         term.esc = 0;
 860                 } else {
 861                         switch(c) {
 862                         case '[':
 863                                 term.esc |= ESC_CSI;
 864                                 break;
 865                         case ']':
 866                                 term.esc |= ESC_OSC;
 867                                 break;
 868                         case '(':
 869                                 term.esc |= ESC_ALTCHARSET;
 870                                 break;
 871                         case 'A':
 872                                 tmoveto(term.c.x, term.c.y-1);
 873                                 term.esc = 0;
 874                                 break;
 875                         case 'B':
 876                                 tmoveto(term.c.x, term.c.y+1);
 877                                 term.esc = 0;
 878                                 break;
 879                         case 'C':
 880                                 tmoveto(term.c.x+1, term.c.y);
 881                                 term.esc = 0;
 882                                 break;
 883                         case 'D': /* XXX: CUP (VT100) or IND (VT52) ... */
 884                                 tmoveto(term.c.x-1, term.c.y);
 885                                 term.esc = 0;
 886                                 break;
 887                         case 'E': /* NEL -- Next line */
 888                                 tnewline();
 889                                 term.esc = 0;
 890                                 break;
 891                         case 'M': /* RI -- Reverse index */
 892                                 if(term.c.y == term.top)
 893                                         tscrolldown(1);
 894                                 else
 895                                         tmoveto(term.c.x, term.c.y-1);
 896                                 term.esc = 0;
 897                                 break;
 898                         case 'c': /* RIS -- Reset to inital state */
 899                                 treset();
 900                                 term.esc = 0;
 901                                 break;
 902                         case '=': /* DECPAM */
 903                                 term.mode |= MODE_APPKEYPAD;
 904                                 term.esc = 0;
 905                                 break;
 906                         case '>': /* DECPNM */
 907                                 term.mode &= ~MODE_APPKEYPAD;
 908                                 term.esc = 0;
 909                                 break;
 910                         case '7':
 911                                 tcursor(CURSOR_SAVE);
 912                                 term.esc = 0;
 913                                 break;
 914                         case '8':
 915                                 tcursor(CURSOR_LOAD);
 916                                 term.esc = 0;
 917                                 break;
 918                         default:
 919                                 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
 920                                 term.esc = 0;
 921                         }
 922                 }
 923         } else {
 924                 switch(c) {
 925                 case '\t':
 926                         tputtab();
 927                         break;
 928                 case '\b':
 929                         tmoveto(term.c.x-1, term.c.y);
 930                         break;
 931                 case '\r':
 932                         tmoveto(0, term.c.y);
 933                         break;
 934                 case '\n':
 935                         tnewline();
 936                         break;
 937                 case '\a':
 938                         xbell();
 939                         break;
 940                 case '\033':
 941                         csireset();
 942                         term.esc = ESC_START;
 943                         break;
 944                 default:
 945                         tsetchar(c);
 946                         if(term.c.x+1 < term.col) {
 947                                 tmoveto(term.c.x+1, term.c.y);
 948                         } else if(IS_SET(MODE_WRAP))
 949                                 tnewline();
 950                         break;
 951                 }
 952         }
 953 }
 954
 955 void
 956 tputs(char *s, int len) {
 957         for(; len > 0; len--)
 958                 tputc(*s++);
 959 }
 960
 961 void
 962 tresize(int col, int row) {
 963         int i;
 964         int minrow = MIN(row, term.row);
 965         int mincol = MIN(col, term.col);
 966
 967         if(col < 1 || row < 1)
 968                 return;
 969
 970         /* free uneeded rows */
 971         for(i = row; i < term.row; i++)
 972                 free(term.line[i]);
 973
 974         /* resize to new height */
 975         term.line = realloc(term.line, row * sizeof(Line));
 976
 977         /* resize each row to new width, zero-pad if needed */
 978         for(i = 0; i < minrow; i++) {
 979                 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
 980                 memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
 981         }
 982
 983         /* allocate any new rows */
 984         for(/* i == minrow */; i < row; i++)
 985                 term.line[i] = calloc(col, sizeof(Glyph));
 986
 987         LIMIT(term.c.x, 0, col-1);
 988         LIMIT(term.c.y, 0, row-1);
 989         LIMIT(term.top, 0, row-1);
 990         LIMIT(term.bot, 0, row-1);
 991
 992         term.bot = row-1;
 993         term.col = col, term.row = row;
 994 }
 995
 996 void
 997 xloadcols(void) {
 998         int i, r, g, b;
 999         XColor color;
1000         Colormap cmap = DefaultColormap(xw.dis, xw.scr);
1001         unsigned long white = WhitePixel(xw.dis, xw.scr);
1002
1003         for(i = 0; i < 16; i++) {
1004                 if (!XAllocNamedColor(xw.dis, cmap, colorname[i], &color, &color)) {
1005                         dc.col[i] = white;
1006                         fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1007                 } else
1008                         dc.col[i] = color.pixel;
1009         }
1010
1011         /* same colors as xterm */
1012         for(r = 0; r < 6; r++)
1013                 for(g = 0; g < 6; g++)
1014                         for(b = 0; b < 6; b++) {
1015                                 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1016                                 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1017                                 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
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                                 i++;
1024                         }
1025
1026         for(r = 0; r < 24; r++, i++) {
1027                 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1028                 if (!XAllocColor(xw.dis, cmap, &color)) {
1029                         dc.col[i] = white;
1030                         fprintf(stderr, "Could not allocate color %d\n", i);
1031                 } else
1032                         dc.col[i] = color.pixel;
1033         }
1034 }
1035
1036 void
1037 xclear(int x1, int y1, int x2, int y2) {
1038         XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1039         XFillRectangle(xw.dis, xw.buf, dc.gc,
1040                        x1 * xw.cw, y1 * xw.ch,
1041                        (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1042 }
1043
1044 void
1045 xhints(void)
1046 {
1047         XClassHint class = {TNAME, TNAME};
1048         XWMHints wm = {.flags = InputHint, .input = 1};
1049         XSizeHints size = {
1050                 .flags = PSize | PResizeInc | PBaseSize,
1051                 .height = xw.h,
1052                 .width = xw.w,
1053                 .height_inc = xw.ch,
1054                 .width_inc = xw.cw,
1055                 .base_height = 2*BORDER,
1056                 .base_width = 2*BORDER,
1057         };
1058         XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1059 }
1060
1061 void
1062 xinit(void) {
1063         if(!(xw.dis = XOpenDisplay(NULL)))
1064                 die("Can't open display\n");
1065         xw.scr = XDefaultScreen(xw.dis);
1066
1067         /* font */
1068         if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1069                 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1070
1071         /* XXX: Assuming same size for bold font */
1072         xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1073         xw.ch = dc.font->ascent + dc.font->descent;
1074
1075         /* colors */
1076         xloadcols();
1077
1078         term.c.attr.fg = DefaultFG;
1079         term.c.attr.bg = DefaultBG;
1080         term.c.attr.mode = ATTR_NULL;
1081         /* windows */
1082         xw.h = term.row * xw.ch + 2*BORDER;
1083         xw.w = term.col * xw.cw + 2*BORDER;
1084         xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1085                         xw.w, xw.h, 0,
1086                         dc.col[DefaultBG],
1087                         dc.col[DefaultBG]);
1088         xw.bufw = xw.w - 2*BORDER;
1089         xw.bufh = xw.h - 2*BORDER;
1090         xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1091         /* gc */
1092         dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1093         XMapWindow(xw.dis, xw.win);
1094         xhints();
1095         XStoreName(xw.dis, xw.win, "st");
1096         XSync(xw.dis, 0);
1097 }
1098
1099 void
1100 xdraws(char *s, Glyph base, int x, int y, int len) {
1101         unsigned long xfg, xbg;
1102         int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1103         int i;
1104
1105         if(base.mode & ATTR_REVERSE)
1106                 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1107         else
1108                 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1109
1110         XSetBackground(xw.dis, dc.gc, xbg);
1111         XSetForeground(xw.dis, dc.gc, xfg);
1112
1113         if(base.mode & ATTR_GFX)
1114                 for(i = 0; i < len; i++)
1115                         s[i] = gfx[(int)s[i]];
1116
1117         XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1118         XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1119
1120         if(base.mode & ATTR_UNDERLINE)
1121                 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1122 }
1123
1124 void
1125 xcursor(int mode) {
1126         static int oldx = 0;
1127         static int oldy = 0;
1128         Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1129
1130         LIMIT(oldx, 0, term.col-1);
1131         LIMIT(oldy, 0, term.row-1);
1132
1133         if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1134                 g.c = term.line[term.c.y][term.c.x].c;
1135
1136         /* remove the old cursor */
1137         if(term.line[oldy][oldx].state & GLYPH_SET)
1138                 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1139         else
1140                 xclear(oldx, oldy, oldx, oldy);
1141
1142         /* draw the new one */
1143         if(mode == CURSOR_DRAW) {
1144                 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1145                 oldx = term.c.x, oldy = term.c.y;
1146         }
1147 }
1148
1149 #ifdef DEBUG
1150 /* basic drawing routines */
1151 void
1152 xdrawc(int x, int y, Glyph g) {
1153         XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1154         XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1155         XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1156         XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1157         XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1158 }
1159
1160 void
1161 draw(int dummy) {
1162         int x, y;
1163
1164         xclear(0, 0, term.col-1, term.row-1);
1165         for(y = 0; y < term.row; y++)
1166                 for(x = 0; x < term.col; x++)
1167                         if(term.line[y][x].state & GLYPH_SET)
1168                                 xdrawc(x, y, term.line[y][x]);
1169
1170         xcursor(term.c.hide);
1171         XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1172         XFlush(xw.dis);
1173 }
1174
1175 #else
1176 /* optimized drawing routine */
1177 void
1178 draw(int redraw_all) {
1179         int i, x, y, ox;
1180         Glyph base, new;
1181         char buf[DRAW_BUF_SIZ];
1182
1183         XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1184         XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.bufw, xw.bufh);
1185         for(y = 0; y < term.row; y++) {
1186                 base = term.line[y][0];
1187                 i = ox = 0;
1188                 for(x = 0; x < term.col; x++) {
1189                         new = term.line[y][x];
1190                         if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1191                                                 i >= DRAW_BUF_SIZ)) {
1192                                 xdraws(buf, base, ox, y, i);
1193                                 i = 0;
1194                         }
1195                         if(new.state & GLYPH_SET) {
1196                                 if(i == 0) {
1197                                         ox = x;
1198                                         base = new;
1199                                 }
1200                                 buf[i++] = new.c;
1201                         }
1202                 }
1203                 if(i > 0)
1204                         xdraws(buf, base, ox, y, i);
1205         }
1206         xcursor(term.c.hide);
1207         XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1208         XFlush(xw.dis);
1209 }
1210
1211 #endif
1212
1213 void
1214 expose(XEvent *ev) {
1215         draw(SCREEN_REDRAW);
1216 }
1217
1218 char*
1219 kmap(KeySym k) {
1220         int i;
1221         for(i = 0; i < LEN(key); i++)
1222                 if(key[i].k == k)
1223                         return (char*)key[i].s;
1224         return NULL;
1225 }
1226
1227 void
1228 kpress(XEvent *ev) {
1229         XKeyEvent *e = &ev->xkey;
1230         KeySym ksym;
1231         char buf[32];
1232         char *customkey;
1233         int len;
1234         int meta;
1235         int shift;
1236
1237         meta = e->state & Mod1Mask;
1238         shift = e->state & ShiftMask;
1239         len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
1240
1241         if((customkey = kmap(ksym)))
1242                 ttywrite(customkey, strlen(customkey));
1243         else if(len > 0) {
1244                 buf[sizeof(buf)-1] = '\0';
1245                 if(meta && len == 1)
1246                         ttywrite("\033", 1);
1247                 ttywrite(buf, len);
1248         } else
1249                 switch(ksym) {
1250                 case XK_Up:
1251                 case XK_Down:
1252                 case XK_Left:
1253                 case XK_Right:
1254                         sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1255                         ttywrite(buf, 3);
1256                         break;
1257                 case XK_Insert:
1258                         if(shift)
1259                                 draw(1), puts("draw!")/* XXX: paste X clipboard */;
1260                         break;
1261                 default:
1262                         fprintf(stderr, "errkey: %d\n", (int)ksym);
1263                         break;
1264                 }
1265 }
1266
1267 void
1268 resize(XEvent *e) {
1269         int col, row;
1270
1271         if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1272                 return;
1273
1274         xw.w = e->xconfigure.width;
1275         xw.h = e->xconfigure.height;
1276         xw.bufw = xw.w - 2*BORDER;
1277         xw.bufh = xw.h - 2*BORDER;
1278         col = xw.bufw / xw.cw;
1279         row = xw.bufh / xw.ch;
1280         tresize(col, row);
1281         ttyresize(col, row);
1282         XFreePixmap(xw.dis, xw.buf);
1283         xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1284         draw(SCREEN_REDRAW);
1285 }
1286
1287 void
1288 run(void) {
1289         XEvent ev;
1290         fd_set rfd;
1291         int xfd = XConnectionNumber(xw.dis);
1292
1293         running = 1;
1294         XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
1295         XResizeWindow(xw.dis, xw.win, xw.w, xw.h); /* XXX: fix resize bug in wmii (?) */
1296
1297         while(running) {
1298                 FD_ZERO(&rfd);
1299                 FD_SET(cmdfd, &rfd);
1300                 FD_SET(xfd, &rfd);
1301                 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1302                         if(errno == EINTR)
1303                                 continue;
1304                         die("select failed: %s\n", SERRNO);
1305                 }
1306                 if(FD_ISSET(cmdfd, &rfd)) {
1307                         ttyread();
1308                         draw(SCREEN_UPDATE);
1309                 }
1310                 while(XPending(xw.dis)) {
1311                         XNextEvent(xw.dis, &ev);
1312                         if(handler[ev.type])
1313                                 (handler[ev.type])(&ev);
1314                 }
1315         }
1316 }
1317
1318 int
1319 main(int argc, char *argv[]) {
1320         if(argc == 2 && !strncmp("-v", argv[1], 3))
1321                 die("st-" VERSION ", (c) 2010 st engineers\n");
1322         else if(argc != 1)
1323                 die("usage: st [-v]\n");
1324         setlocale(LC_CTYPE, "");
1325         tnew(80, 24);
1326         ttynew();
1327         xinit();
1328         run();
1329         return 0;
1330 }