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, CURSOR_DRAW,
  50        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         usleep(BellTime);
 234         draw(SCREEN_REDRAW);
 235 }
 236
 237 void
 238 sigchld(int a) {
 239         int stat = 0;
 240         if(waitpid(pid, &stat, 0) < 0)
 241                 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
 242         if(WIFEXITED(stat))
 243                 exit(WEXITSTATUS(stat));
 244         else
 245                 exit(EXIT_FAILURE);
 246 }
 247
 248 void
 249 ttynew(void) {
 250         int m, s;
 251
 252         /* seems to work fine on linux, openbsd and freebsd */
 253         struct winsize w = {term.row, term.col, 0, 0};
 254         if(openpty(&m, &s, NULL, NULL, &w) < 0)
 255                 die("openpty failed: %s\n", SERRNO);
 256
 257         switch(pid = fork()) {
 258         case -1:
 259                 die("fork failed\n");
 260                 break;
 261         case 0:
 262                 setsid(); /* create a new process group */
 263                 dup2(s, STDIN_FILENO);
 264                 dup2(s, STDOUT_FILENO);
 265                 dup2(s, STDERR_FILENO);
 266                 if(ioctl(s, TIOCSCTTY, NULL) < 0)
 267                         die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
 268                 close(s);
 269                 close(m);
 270                 execsh();
 271                 break;
 272         default:
 273                 close(s);
 274                 cmdfd = m;
 275                 signal(SIGCHLD, sigchld);
 276         }
 277 }
 278
 279 void
 280 dump(char c) {
 281         static int col;
 282         fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
 283         if(++col % 10 == 0)
 284                 fprintf(stderr, "\n");
 285 }
 286
 287 void
 288 ttyread(void) {
 289         char buf[BUFSIZ] = {0};
 290         int ret;
 291
 292         if((ret = read(cmdfd, buf, BUFSIZ)) < 0)
 293                 die("Couldn't read from shell: %s\n", SERRNO);
 294         else
 295                 tputs(buf, ret);
 296 }
 297
 298 void
 299 ttywrite(const char *s, size_t n) {
 300         if(write(cmdfd, s, n) == -1)
 301                 die("write error on tty: %s\n", SERRNO);
 302 }
 303
 304 void
 305 ttyresize(int x, int y) {
 306         struct winsize w;
 307
 308         w.ws_row = term.row;
 309         w.ws_col = term.col;
 310         w.ws_xpixel = w.ws_ypixel = 0;
 311         if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
 312                 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
 313 }
 314
 315 void
 316 tcursor(int mode) {
 317         static TCursor c;
 318
 319         if(mode == CURSOR_SAVE)
 320                 c = term.c;
 321         else if(mode == CURSOR_LOAD)
 322                 term.c = c, tmoveto(c.x, c.y);
 323 }
 324
 325 void
 326 treset(void) {
 327         term.c = (TCursor){{
 328                 .mode = ATTR_NULL,
 329                 .fg = DefaultFG,
 330                 .bg = DefaultBG
 331         }, .x = 0, .y = 0, .hide = 0};
 332
 333         term.top = 0, term.bot = term.row - 1;
 334         term.mode = MODE_WRAP;
 335         tclearregion(0, 0, term.col-1, term.row-1);
 336 }
 337
 338 void
 339 tnew(int col, int row) {
 340         /* set screen size */
 341         term.row = row, term.col = col;
 342         term.line = malloc(term.row * sizeof(Line));
 343         for(row = 0 ; row < term.row; row++)
 344                 term.line[row] = malloc(term.col * sizeof(Glyph));
 345         /* setup screen */
 346         treset();
 347 }
 348
 349 void
 350 tscrolldown (int n) {
 351         int i;
 352         Line temp;
 353
 354         LIMIT(n, 0, term.bot-term.top+1);
 355
 356         for(i = 0; i < n; i++)
 357                 memset(term.line[term.bot-i], 0, term.col*sizeof(Glyph));
 358
 359         for(i = term.bot; i >= term.top+n; i--) {
 360                 temp = term.line[i];
 361                 term.line[i] = term.line[i-n];
 362                 term.line[i-n] = temp;
 363         }
 364 }
 365
 366 void
 367 tscrollup (int n) {
 368         int i;
 369         Line temp;
 370         LIMIT(n, 0, term.bot-term.top+1);
 371
 372         for(i = 0; i < n; i++)
 373                 memset(term.line[term.top+i], 0, term.col*sizeof(Glyph));
 374
 375          for(i = term.top; i <= term.bot-n; i++) {
 376                  temp = term.line[i];
 377                  term.line[i] = term.line[i+n];
 378                  term.line[i+n] = temp;
 379          }
 380 }
 381
 382 void
 383 tnewline(void) {
 384         int y = term.c.y + 1;
 385         if(y > term.bot)
 386                 tscrollup(1), y = term.bot;
 387         tmoveto(0, y);
 388 }
 389
 390 void
 391 csiparse(void) {
 392         /* int noarg = 1; */
 393         char *p = escseq.buf;
 394
 395         escseq.narg = 0;
 396         if(*p == '?')
 397                 escseq.priv = 1, p++;
 398
 399         while(p < escseq.buf+escseq.len) {
 400                 while(isdigit(*p)) {
 401                         escseq.arg[escseq.narg] *= 10;
 402                         escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
 403                 }
 404                 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
 405                         escseq.narg++, p++;
 406                 else {
 407                         escseq.mode = *p;
 408                         escseq.narg++;
 409                         return;
 410                 }
 411         }
 412 }
 413
 414 void
 415 tmoveto(int x, int y) {
 416         term.c.x = x < 0 ? 0 : x >= term.col ? term.col-1 : x;
 417         term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y;
 418 }
 419
 420 void
 421 tsetchar(char c) {
 422         term.line[term.c.y][term.c.x] = term.c.attr;
 423         term.line[term.c.y][term.c.x].c = c;
 424         term.line[term.c.y][term.c.x].state |= GLYPH_SET;
 425 }
 426
 427 void
 428 tclearregion(int x1, int y1, int x2, int y2) {
 429         int y, temp;
 430
 431         if(x1 > x2)
 432                 temp = x1, x1 = x2, x2 = temp;
 433         if(y1 > y2)
 434                 temp = y1, y1 = y2, y2 = temp;
 435
 436         LIMIT(x1, 0, term.col-1);
 437         LIMIT(x2, 0, term.col-1);
 438         LIMIT(y1, 0, term.row-1);
 439         LIMIT(y2, 0, term.row-1);
 440
 441         for(y = y1; y <= y2; y++)
 442                 memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1));
 443 }
 444
 445 void
 446 tdeletechar(int n) {
 447         int src = term.c.x + n;
 448         int dst = term.c.x;
 449         int size = term.col - src;
 450
 451         if(src >= term.col) {
 452                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 453                 return;
 454         }
 455         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 456         tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
 457 }
 458
 459 void
 460 tinsertblank(int n) {
 461         int src = term.c.x;
 462         int dst = src + n;
 463         int size = term.col - dst;
 464
 465         if(dst >= term.col) {
 466                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 467                 return;
 468         }
 469         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 470         tclearregion(src, term.c.y, dst - 1, term.c.y);
 471 }
 472
 473 void
 474 tinsertblankline(int n) {
 475         int i;
 476         Line blank;
 477         int bot = term.bot;
 478
 479         if(term.c.y > term.bot)
 480                 bot = term.row - 1;
 481         else if(term.c.y < term.top)
 482                 bot = term.top - 1;
 483         if(term.c.y + n >= bot) {
 484                 tclearregion(0, term.c.y, term.col-1, bot);
 485                 return;
 486         }
 487         for(i = bot; i >= term.c.y+n; i--) {
 488                 /* swap deleted line <-> blanked line */
 489                 blank = term.line[i];
 490                 term.line[i] = term.line[i-n];
 491                 term.line[i-n] = blank;
 492                 /* blank it */
 493                 memset(blank, 0, term.col * sizeof(Glyph));
 494         }
 495 }
 496
 497 void
 498 tdeleteline(int n) {
 499         int i;
 500         Line blank;
 501         int bot = term.bot;
 502
 503         if(term.c.y > term.bot)
 504                 bot = term.row - 1;
 505         else if(term.c.y < term.top)
 506                 bot = term.top - 1;
 507         if(term.c.y + n >= bot) {
 508                 tclearregion(0, term.c.y, term.col-1, bot);
 509                 return;
 510         }
 511         for(i = term.c.y; i <= bot-n; i++) {
 512                 /* swap deleted line <-> blanked line */
 513                 blank = term.line[i];
 514                 term.line[i] = term.line[i+n];
 515                 term.line[i+n] = blank;
 516                 /* blank it */
 517                 memset(blank, 0, term.col * sizeof(Glyph));
 518         }
 519 }
 520
 521 void
 522 tsetattr(int *attr, int l) {
 523         int i;
 524
 525         for(i = 0; i < l; i++) {
 526                 switch(attr[i]) {
 527                 case 0:
 528                         term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
 529                         term.c.attr.fg = DefaultFG;
 530                         term.c.attr.bg = DefaultBG;
 531                         break;
 532                 case 1:
 533                         term.c.attr.mode |= ATTR_BOLD;
 534                         break;
 535                 case 4:
 536                         term.c.attr.mode |= ATTR_UNDERLINE;
 537                         break;
 538                 case 7:
 539                         term.c.attr.mode |= ATTR_REVERSE;
 540                         break;
 541                 case 22:
 542                         term.c.attr.mode &= ~ATTR_BOLD;
 543                         break;
 544                 case 24:
 545                         term.c.attr.mode &= ~ATTR_UNDERLINE;
 546                         break;
 547                 case 27:
 548                         term.c.attr.mode &= ~ATTR_REVERSE;
 549                         break;
 550                 case 38:
 551                         if (i + 2 < l && attr[i + 1] == 5) {
 552                                 i += 2;
 553                                 if (BETWEEN(attr[i], 0, 255))
 554                                         term.c.attr.fg = attr[i];
 555                                 else
 556                                         fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
 557                         }
 558                         else
 559                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 560                         break;
 561                 case 39:
 562                         term.c.attr.fg = DefaultFG;
 563                         break;
 564                 case 48:
 565                         if (i + 2 < l && attr[i + 1] == 5) {
 566                                 i += 2;
 567                                 if (BETWEEN(attr[i], 0, 255))
 568                                         term.c.attr.bg = attr[i];
 569                                 else
 570                                         fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
 571                         }
 572                         else
 573                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 574                         break;
 575                 case 49:
 576                         term.c.attr.bg = DefaultBG;
 577                         break;
 578                 default:
 579                         if(BETWEEN(attr[i], 30, 37))
 580                                 term.c.attr.fg = attr[i] - 30;
 581                         else if(BETWEEN(attr[i], 40, 47))
 582                                 term.c.attr.bg = attr[i] - 40;
 583                         else if(BETWEEN(attr[i], 90, 97))
 584                                 term.c.attr.fg = attr[i] - 90 + 8;
 585                         else if(BETWEEN(attr[i], 100, 107))
 586                                 term.c.attr.fg = attr[i] - 100 + 8;
 587                         else
 588                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 589                         break;
 590                 }
 591         }
 592 }
 593
 594 void
 595 tsetscroll(int t, int b) {
 596         int temp;
 597
 598         LIMIT(t, 0, term.row-1);
 599         LIMIT(b, 0, term.row-1);
 600         if(t > b) {
 601                 temp = t;
 602                 t = b;
 603                 b = temp;
 604         }
 605         term.top = t;
 606         term.bot = b;
 607 }
 608
 609 void
 610 csihandle(void) {
 611         switch(escseq.mode) {
 612         default:
 613         unknown:
 614                 printf("erresc: unknown csi ");
 615                 csidump();
 616                 /* die(""); */
 617                 break;
 618         case '@': /* ICH -- Insert <n> blank char */
 619                 DEFAULT(escseq.arg[0], 1);
 620                 tinsertblank(escseq.arg[0]);
 621                 break;
 622         case 'A': /* CUU -- Cursor <n> Up */
 623         case 'e':
 624                 DEFAULT(escseq.arg[0], 1);
 625                 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
 626                 break;
 627         case 'B': /* CUD -- Cursor <n> Down */
 628                 DEFAULT(escseq.arg[0], 1);
 629                 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
 630                 break;
 631         case 'C': /* CUF -- Cursor <n> Forward */
 632         case 'a':
 633                 DEFAULT(escseq.arg[0], 1);
 634                 tmoveto(term.c.x+escseq.arg[0], term.c.y);
 635                 break;
 636         case 'D': /* CUB -- Cursor <n> Backward */
 637                 DEFAULT(escseq.arg[0], 1);
 638                 tmoveto(term.c.x-escseq.arg[0], term.c.y);
 639                 break;
 640         case 'E': /* CNL -- Cursor <n> Down and first col */
 641                 DEFAULT(escseq.arg[0], 1);
 642                 tmoveto(0, term.c.y+escseq.arg[0]);
 643                 break;
 644         case 'F': /* CPL -- Cursor <n> Up and first col */
 645                 DEFAULT(escseq.arg[0], 1);
 646                 tmoveto(0, term.c.y-escseq.arg[0]);
 647                 break;
 648         case 'G': /* CHA -- Move to <col> */
 649         case '`': /* XXX: HPA -- same? */
 650                 DEFAULT(escseq.arg[0], 1);
 651                 tmoveto(escseq.arg[0]-1, term.c.y);
 652                 break;
 653         case 'H': /* CUP -- Move to <row> <col> */
 654         case 'f': /* XXX: HVP -- same? */
 655                 DEFAULT(escseq.arg[0], 1);
 656                 DEFAULT(escseq.arg[1], 1);
 657                 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
 658                 break;
 659         /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
 660         case 'J': /* ED -- Clear screen */
 661                 switch(escseq.arg[0]) {
 662                 case 0: /* below */
 663                         tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
 664                         break;
 665                 case 1: /* above */
 666                         tclearregion(0, 0, term.c.x, term.c.y);
 667                         break;
 668                 case 2: /* all */
 669                         tclearregion(0, 0, term.col-1, term.row-1);
 670                         break;
 671                 case 3: /* XXX: erase saved lines (xterm) */
 672                 default:
 673                         goto unknown;
 674                 }
 675                 break;
 676         case 'K': /* EL -- Clear line */
 677                 switch(escseq.arg[0]) {
 678                 case 0: /* right */
 679                         tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 680                         break;
 681                 case 1: /* left */
 682                         tclearregion(0, term.c.y, term.c.x, term.c.y);
 683                         break;
 684                 case 2: /* all */
 685                         tclearregion(0, term.c.y, term.col-1, term.c.y);
 686                         break;
 687                 }
 688                 break;
 689         case 'S': /* SU -- Scroll <n> line up */
 690                 DEFAULT(escseq.arg[0], 1);
 691                 tscrollup(escseq.arg[0]);
 692                 break;
 693         case 'T': /* SD -- Scroll <n> line down */
 694                 DEFAULT(escseq.arg[0], 1);
 695                 tscrolldown(escseq.arg[0]);
 696                 break;
 697         case 'L': /* IL -- Insert <n> blank lines */
 698                 DEFAULT(escseq.arg[0], 1);
 699                 tinsertblankline(escseq.arg[0]);
 700                 break;
 701         case 'l': /* RM -- Reset Mode */
 702                 if(escseq.priv) {
 703                         switch(escseq.arg[0]) {
 704                         case 1:
 705                                 term.mode &= ~MODE_APPKEYPAD;
 706                                 break;
 707                         case 7:
 708                                 term.mode &= ~MODE_WRAP;
 709                                 break;
 710                         case 12: /* att610 -- Stop blinking cursor (IGNORED) */
 711                                 break;
 712                         case 25:
 713                                 term.c.hide = 1;
 714                                 break;
 715                         case 1048: /* XXX: no alt. screen to erase/save */
 716                         case 1049:
 717                                 tcursor(CURSOR_LOAD);
 718                                 tclearregion(0, 0, term.col-1, term.row-1);
 719                                 break;
 720                         default:
 721                                 goto unknown;
 722                         }
 723                 } else {
 724                         switch(escseq.arg[0]) {
 725                         case 4:
 726                                 term.mode &= ~MODE_INSERT;
 727                                 break;
 728                         default:
 729                                 goto unknown;
 730                         }
 731                 }
 732                 break;
 733         case 'M': /* DL -- Delete <n> lines */
 734                 DEFAULT(escseq.arg[0], 1);
 735                 tdeleteline(escseq.arg[0]);
 736                 break;
 737         case 'X': /* ECH -- Erase <n> char */
 738                 DEFAULT(escseq.arg[0], 1);
 739                 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
 740                 break;
 741         case 'P': /* DCH -- Delete <n> char */
 742                 DEFAULT(escseq.arg[0], 1);
 743                 tdeletechar(escseq.arg[0]);
 744                 break;
 745         /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
 746         case 'd': /* VPA -- Move to <row> */
 747                 DEFAULT(escseq.arg[0], 1);
 748                 tmoveto(term.c.x, escseq.arg[0]-1);
 749                 break;
 750         case 'h': /* SM -- Set terminal mode */
 751                 if(escseq.priv) {
 752                         switch(escseq.arg[0]) {
 753                         case 1:
 754                                 term.mode |= MODE_APPKEYPAD;
 755                                 break;
 756                         case 7:
 757                                 term.mode |= MODE_WRAP;
 758                                 break;
 759                         case 12: /* att610 -- Start blinking cursor (IGNORED) */
 760                                 break;
 761                         case 25:
 762                                 term.c.hide = 0;
 763                                 break;
 764                         case 1048:
 765                         case 1049: /* XXX: no alt. screen to erase/save */
 766                                 tcursor(CURSOR_SAVE);
 767                                 tclearregion(0, 0, term.col-1, term.row-1);
 768                                 break;
 769                         default: goto unknown;
 770                         }
 771                 } else {
 772                         switch(escseq.arg[0]) {
 773                         case 4:
 774                                 term.mode |= MODE_INSERT;
 775                                 break;
 776                         default: goto unknown;
 777                         }
 778                 };
 779                 break;
 780         case 'm': /* SGR -- Terminal attribute (color) */
 781                 tsetattr(escseq.arg, escseq.narg);
 782                 break;
 783         case 'r': /* DECSTBM -- Set Scrolling Region */
 784                 if(escseq.priv)
 785                         goto unknown;
 786                 else {
 787                         DEFAULT(escseq.arg[0], 1);
 788                         DEFAULT(escseq.arg[1], term.row);
 789                         tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
 790                 }
 791                 break;
 792         case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
 793                 tcursor(CURSOR_SAVE);
 794                 break;
 795         case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
 796                 tcursor(CURSOR_LOAD);
 797                 break;
 798         }
 799 }
 800
 801 void
 802 csidump(void) {
 803         int i;
 804         printf("ESC [ %s", escseq.priv ? "? " : "");
 805         if(escseq.narg)
 806                 for(i = 0; i < escseq.narg; i++)
 807                         printf("%d ", escseq.arg[i]);
 808         if(escseq.mode)
 809                 putchar(escseq.mode);
 810         putchar('\n');
 811 }
 812
 813 void
 814 csireset(void) {
 815         memset(&escseq, 0, sizeof(escseq));
 816 }
 817
 818 void
 819 tputtab(void) {
 820         int space = TAB - term.c.x % TAB;
 821         tmoveto(term.c.x + space, term.c.y);
 822 }
 823
 824 void
 825 tputc(char c) {
 826         if(term.esc & ESC_START) {
 827                 if(term.esc & ESC_CSI) {
 828                         escseq.buf[escseq.len++] = c;
 829                         if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
 830                                 term.esc = 0;
 831                                 csiparse(), csihandle();
 832                         }
 833                 } else if(term.esc & ESC_OSC) {
 834                         if(c == ';') {
 835                                 term.titlelen = 0;
 836                                 term.esc = ESC_START | ESC_TITLE;
 837                         }
 838                 } else if(term.esc & ESC_TITLE) {
 839                         if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
 840                                 term.esc = 0;
 841                                 term.title[term.titlelen] = '\0';
 842                                 XStoreName(xw.dis, xw.win, term.title);
 843                         } else {
 844                                 term.title[term.titlelen++] = c;
 845                         }
 846                 } else if(term.esc & ESC_ALTCHARSET) {
 847                         switch(c) {
 848                         case '0': /* Line drawing crap */
 849                                 term.c.attr.mode |= ATTR_GFX;
 850                                 break;
 851                         case 'B': /* Back to regular text */
 852                                 term.c.attr.mode &= ~ATTR_GFX;
 853                                 break;
 854                         default:
 855                                 printf("esc unhandled charset: ESC ( %c\n", c);
 856                         }
 857                         term.esc = 0;
 858                 } else {
 859                         switch(c) {
 860                         case '[':
 861                                 term.esc |= ESC_CSI;
 862                                 break;
 863                         case ']':
 864                                 term.esc |= ESC_OSC;
 865                                 break;
 866                         case '(':
 867                                 term.esc |= ESC_ALTCHARSET;
 868                                 break;
 869                         case 'A':
 870                                 tmoveto(term.c.x, term.c.y-1);
 871                                 term.esc = 0;
 872                                 break;
 873                         case 'B':
 874                                 tmoveto(term.c.x, term.c.y+1);
 875                                 term.esc = 0;
 876                                 break;
 877                         case 'C':
 878                                 tmoveto(term.c.x+1, term.c.y);
 879                                 term.esc = 0;
 880                                 break;
 881                         case 'D': /* XXX: CUP (VT100) or IND (VT52) ... */
 882                                 tmoveto(term.c.x-1, term.c.y);
 883                                 term.esc = 0;
 884                                 break;
 885                         case 'E': /* NEL -- Next line */
 886                                 tnewline();
 887                                 term.esc = 0;
 888                                 break;
 889                         case 'M': /* RI -- Reverse index */
 890                                 if(term.c.y == term.top)
 891                                         tscrolldown(1);
 892                                 else
 893                                         tmoveto(term.c.x, term.c.y-1);
 894                                 term.esc = 0;
 895                                 break;
 896                         case 'c': /* RIS -- Reset to inital state */
 897                                 treset();
 898                                 term.esc = 0;
 899                                 break;
 900                         case '=': /* DECPAM */
 901                                 term.mode |= MODE_APPKEYPAD;
 902                                 term.esc = 0;
 903                                 break;
 904                         case '>': /* DECPNM */
 905                                 term.mode &= ~MODE_APPKEYPAD;
 906                                 term.esc = 0;
 907                                 break;
 908                         case '7':
 909                                 tcursor(CURSOR_SAVE);
 910                                 term.esc = 0;
 911                                 break;
 912                         case '8':
 913                                 tcursor(CURSOR_LOAD);
 914                                 term.esc = 0;
 915                                 break;
 916                         default:
 917                                 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
 918                                 term.esc = 0;
 919                         }
 920                 }
 921         } else {
 922                 switch(c) {
 923                 case '\t':
 924                         tputtab();
 925                         break;
 926                 case '\b':
 927                         tmoveto(term.c.x-1, term.c.y);
 928                         break;
 929                 case '\r':
 930                         tmoveto(0, term.c.y);
 931                         break;
 932                 case '\n':
 933                         tnewline();
 934                         break;
 935                 case '\a':
 936                         xbell();
 937                         break;
 938                 case '\033':
 939                         csireset();
 940                         term.esc = ESC_START;
 941                         break;
 942                 default:
 943                         tsetchar(c);
 944                         if(term.c.x+1 < term.col) {
 945                                 tmoveto(term.c.x+1, term.c.y);
 946                         } else if(IS_SET(MODE_WRAP))
 947                                 tnewline();
 948                         break;
 949                 }
 950         }
 951 }
 952
 953 void
 954 tputs(char *s, int len) {
 955         for(; len > 0; len--)
 956                 tputc(*s++);
 957 }
 958
 959 void
 960 tresize(int col, int row) {
 961         int i;
 962         int minrow = MIN(row, term.row);
 963         int mincol = MIN(col, term.col);
 964
 965         if(col < 1 || row < 1)
 966                 return;
 967
 968         /* free uneeded rows */
 969         for(i = row; i < term.row; i++)
 970                 free(term.line[i]);
 971
 972         /* resize to new height */
 973         term.line = realloc(term.line, row * sizeof(Line));
 974
 975         /* resize each row to new width, zero-pad if needed */
 976         for(i = 0; i < minrow; i++) {
 977                 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
 978                 memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
 979         }
 980
 981         /* allocate any new rows */
 982         for(/* i == minrow */; i < row; i++)
 983                 term.line[i] = calloc(col, sizeof(Glyph));
 984
 985         LIMIT(term.c.x, 0, col-1);
 986         LIMIT(term.c.y, 0, row-1);
 987         LIMIT(term.top, 0, row-1);
 988         LIMIT(term.bot, 0, row-1);
 989
 990         term.bot = row-1;
 991         term.col = col, term.row = row;
 992 }
 993
 994 void
 995 xloadcols(void) {
 996         int i, r, g, b;
 997         XColor color;
 998         Colormap cmap = DefaultColormap(xw.dis, xw.scr);
 999         unsigned long white = WhitePixel(xw.dis, xw.scr);
1000
1001         for(i = 0; i < 16; i++) {
1002                 if (!XAllocNamedColor(xw.dis, cmap, colorname[i], &color, &color)) {
1003                         dc.col[i] = white;
1004                         fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1005                 } else
1006                         dc.col[i] = color.pixel;
1007         }
1008
1009         /* same colors as xterm */
1010         for(r = 0; r < 6; r++)
1011                 for(g = 0; g < 6; g++)
1012                         for(b = 0; b < 6; b++) {
1013                                 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1014                                 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1015                                 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1016                                 if (!XAllocColor(xw.dis, cmap, &color)) {
1017                                         dc.col[i] = white;
1018                                         fprintf(stderr, "Could not allocate color %d\n", i);
1019                                 } else
1020                                         dc.col[i] = color.pixel;
1021                                 i++;
1022                         }
1023
1024         for(r = 0; r < 24; r++, i++) {
1025                 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1026                 if (!XAllocColor(xw.dis, cmap, &color)) {
1027                         dc.col[i] = white;
1028                         fprintf(stderr, "Could not allocate color %d\n", i);
1029                 } else
1030                         dc.col[i] = color.pixel;
1031         }
1032 }
1033
1034 void
1035 xclear(int x1, int y1, int x2, int y2) {
1036         XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1037         XFillRectangle(xw.dis, xw.buf, dc.gc,
1038                        x1 * xw.cw, y1 * xw.ch,
1039                        (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1040 }
1041
1042 void
1043 xhints(void)
1044 {
1045         XClassHint class = {TNAME, TNAME};
1046         XWMHints wm = {.flags = InputHint, .input = 1};
1047         XSizeHints size = {
1048                 .flags = PSize | PResizeInc | PBaseSize,
1049                 .height = xw.h,
1050                 .width = xw.w,
1051                 .height_inc = xw.ch,
1052                 .width_inc = xw.cw,
1053                 .base_height = 2*BORDER,
1054                 .base_width = 2*BORDER,
1055         };
1056         XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1057 }
1058
1059 void
1060 xinit(void) {
1061         if(!(xw.dis = XOpenDisplay(NULL)))
1062                 die("Can't open display\n");
1063         xw.scr = XDefaultScreen(xw.dis);
1064
1065         /* font */
1066         if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1067                 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1068
1069         /* XXX: Assuming same size for bold font */
1070         xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1071         xw.ch = dc.font->ascent + dc.font->descent;
1072
1073         /* colors */
1074         xloadcols();
1075
1076         term.c.attr.fg = DefaultFG;
1077         term.c.attr.bg = DefaultBG;
1078         term.c.attr.mode = ATTR_NULL;
1079         /* windows */
1080         xw.h = term.row * xw.ch + 2*BORDER;
1081         xw.w = term.col * xw.cw + 2*BORDER;
1082         xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1083                         xw.w, xw.h, 0,
1084                         dc.col[DefaultBG],
1085                         dc.col[DefaultBG]);
1086         xw.bufw = xw.w - 2*BORDER;
1087         xw.bufh = xw.h - 2*BORDER;
1088         xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1089         /* gc */
1090         dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1091         XMapWindow(xw.dis, xw.win);
1092         xhints();
1093         XStoreName(xw.dis, xw.win, "st");
1094         XSync(xw.dis, 0);
1095 }
1096
1097 void
1098 xdraws(char *s, Glyph base, int x, int y, int len) {
1099         unsigned long xfg, xbg;
1100         int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1101         int i;
1102
1103         if(base.mode & ATTR_REVERSE)
1104                 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1105         else
1106                 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1107
1108         XSetBackground(xw.dis, dc.gc, xbg);
1109         XSetForeground(xw.dis, dc.gc, xfg);
1110
1111         if(base.mode & ATTR_GFX)
1112                 for(i = 0; i < len; i++)
1113                         s[i] = gfx[(int)s[i]];
1114
1115         XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1116         XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1117
1118         if(base.mode & ATTR_UNDERLINE)
1119                 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1120 }
1121
1122 void
1123 xcursor(int mode) {
1124         static int oldx = 0;
1125         static int oldy = 0;
1126         Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1127
1128         LIMIT(oldx, 0, term.col-1);
1129         LIMIT(oldy, 0, term.row-1);
1130
1131         if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1132                 g.c = term.line[term.c.y][term.c.x].c;
1133
1134         /* remove the old cursor */
1135         if(term.line[oldy][oldx].state & GLYPH_SET)
1136                 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1137         else
1138                 xclear(oldx, oldy, oldx, oldy);
1139
1140         /* draw the new one */
1141         if(mode == CURSOR_DRAW) {
1142                 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1143                 oldx = term.c.x, oldy = term.c.y;
1144         }
1145 }
1146
1147 #ifdef DEBUG
1148 /* basic drawing routines */
1149 void
1150 xdrawc(int x, int y, Glyph g) {
1151         XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1152         XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1153         XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1154         XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1155         XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1156 }
1157
1158 void
1159 draw(int dummy) {
1160         int x, y;
1161
1162         xclear(0, 0, term.col-1, term.row-1);
1163         for(y = 0; y < term.row; y++)
1164                 for(x = 0; x < term.col; x++)
1165                         if(term.line[y][x].state & GLYPH_SET)
1166                                 xdrawc(x, y, term.line[y][x]);
1167
1168         if(!term.c.hide)
1169                 xcursor(CURSOR_DRAW);
1170         XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1171         XFlush(xw.dis);
1172 }
1173
1174 #else
1175 /* optimized drawing routine */
1176 void
1177 draw(int redraw_all) {
1178         int i, x, y, ox;
1179         Glyph base, new;
1180         char buf[DRAW_BUF_SIZ];
1181
1182         XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1183         XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
1184         for(y = 0; y < term.row; y++) {
1185                 base = term.line[y][0];
1186                 i = ox = 0;
1187                 for(x = 0; x < term.col; x++) {
1188                         new = term.line[y][x];
1189                         if(!ATTRCMP(base, new) && i < DRAW_BUF_SIZ)
1190                                 buf[i++] = new.c;
1191                         else {
1192                                 xdraws(buf, base, ox, y, i);
1193                                 buf[0] = new.c;
1194                                 i = 1;
1195                                 ox = x;
1196                                 base = new;
1197                         }
1198                 }
1199                 xdraws(buf, base, ox, y, i);
1200         }
1201         xcursor(term.c.hide ? CURSOR_HIDE : CURSOR_DRAW);
1202         XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1203         XFlush(xw.dis);
1204 }
1205
1206 #endif
1207
1208 void
1209 expose(XEvent *ev) {
1210         draw(SCREEN_REDRAW);
1211 }
1212
1213 char*
1214 kmap(KeySym k) {
1215         int i;
1216         for(i = 0; i < LEN(key); i++)
1217                 if(key[i].k == k)
1218                         return (char*)key[i].s;
1219         return NULL;
1220 }
1221
1222 void
1223 kpress(XEvent *ev) {
1224         XKeyEvent *e = &ev->xkey;
1225         KeySym ksym;
1226         char buf[32];
1227         char *customkey;
1228         int len;
1229         int meta;
1230         int shift;
1231
1232         meta = e->state & Mod1Mask;
1233         shift = e->state & ShiftMask;
1234         len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
1235
1236         if((customkey = kmap(ksym)))
1237                 ttywrite(customkey, strlen(customkey));
1238         else if(len > 0) {
1239                 buf[sizeof(buf)-1] = '\0';
1240                 if(meta && len == 1)
1241                         ttywrite("\033", 1);
1242                 ttywrite(buf, len);
1243         } else
1244                 switch(ksym) {
1245                 case XK_Up:
1246                 case XK_Down:
1247                 case XK_Left:
1248                 case XK_Right:
1249                         sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1250                         ttywrite(buf, 3);
1251                         break;
1252                 case XK_Insert:
1253                         if(shift)
1254                                 draw(1), puts("draw!")/* XXX: paste X clipboard */;
1255                         break;
1256                 default:
1257                         fprintf(stderr, "errkey: %d\n", (int)ksym);
1258                         break;
1259                 }
1260 }
1261
1262 void
1263 resize(XEvent *e) {
1264         int col, row;
1265
1266         if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1267                 return;
1268
1269         xw.w = e->xconfigure.width;
1270         xw.h = e->xconfigure.height;
1271         xw.bufw = xw.w - 2*BORDER;
1272         xw.bufh = xw.h - 2*BORDER;
1273         col = xw.bufw / xw.cw;
1274         row = xw.bufh / xw.ch;
1275         tresize(col, row);
1276         ttyresize(col, row);
1277         XFreePixmap(xw.dis, xw.buf);
1278         xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1279         draw(SCREEN_REDRAW);
1280 }
1281
1282 void
1283 run(void) {
1284         XEvent ev;
1285         fd_set rfd;
1286         int xfd = XConnectionNumber(xw.dis);
1287
1288         running = 1;
1289         XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
1290         XResizeWindow(xw.dis, xw.win, xw.w, xw.h); /* XXX: fix resize bug in wmii (?) */
1291
1292         while(running) {
1293                 FD_ZERO(&rfd);
1294                 FD_SET(cmdfd, &rfd);
1295                 FD_SET(xfd, &rfd);
1296                 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) == -1) {
1297                         if(errno == EINTR)
1298                                 continue;
1299                         die("select failed: %s\n", SERRNO);
1300                 }
1301                 if(FD_ISSET(cmdfd, &rfd)) {
1302                         ttyread();
1303                         draw(SCREEN_UPDATE);
1304                 }
1305                 while(XPending(xw.dis)) {
1306                         XNextEvent(xw.dis, &ev);
1307                         if(handler[ev.type])
1308                                 (handler[ev.type])(&ev);
1309                 }
1310         }
1311 }
1312
1313 int
1314 main(int argc, char *argv[]) {
1315         if(argc == 2 && !strncmp("-v", argv[1], 3))
1316                 die("st-" VERSION ", (c) 2010 st engineers\n");
1317         else if(argc != 1)
1318                 die("usage: st [-v]\n");
1319         setlocale(LC_CTYPE, "");
1320         tnew(80, 24);
1321         ttynew();
1322         xinit();
1323         run();
1324         return 0;
1325 }