st.c (59324B)
1 /* See LICENSE for license details. */ 2 #include <ctype.h> 3 #include <errno.h> 4 #include <fcntl.h> 5 #include <limits.h> 6 #include <pwd.h> 7 #include <stdarg.h> 8 #include <stdio.h> 9 #include <stdlib.h> 10 #include <string.h> 11 #include <signal.h> 12 #include <sys/ioctl.h> 13 #include <sys/select.h> 14 #include <sys/types.h> 15 #include <sys/wait.h> 16 #include <termios.h> 17 #include <unistd.h> 18 #include <wchar.h> 19 20 #include "st.h" 21 #include "win.h" 22 23 #if defined(__linux) 24 #include <pty.h> 25 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__) 26 #include <util.h> 27 #elif defined(__FreeBSD__) || defined(__DragonFly__) 28 #include <libutil.h> 29 #endif 30 31 /* Arbitrary sizes */ 32 #define UTF_INVALID 0xFFFD 33 #define UTF_SIZ 4 34 #define ESC_BUF_SIZ (128*UTF_SIZ) 35 #define ESC_ARG_SIZ 16 36 #define STR_BUF_SIZ ESC_BUF_SIZ 37 #define STR_ARG_SIZ ESC_ARG_SIZ 38 39 /* macros */ 40 #define IS_SET(flag) ((term.mode & (flag)) != 0) 41 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == 0x7f) 42 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f)) 43 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c)) 44 #define ISDELIM(u) (u && wcschr(worddelimiters, u)) 45 46 enum term_mode { 47 MODE_WRAP = 1 << 0, 48 MODE_INSERT = 1 << 1, 49 MODE_ALTSCREEN = 1 << 2, 50 MODE_CRLF = 1 << 3, 51 MODE_ECHO = 1 << 4, 52 MODE_PRINT = 1 << 5, 53 MODE_UTF8 = 1 << 6, 54 }; 55 56 enum cursor_movement { 57 CURSOR_SAVE, 58 CURSOR_LOAD 59 }; 60 61 enum cursor_state { 62 CURSOR_DEFAULT = 0, 63 CURSOR_WRAPNEXT = 1, 64 CURSOR_ORIGIN = 2 65 }; 66 67 enum charset { 68 CS_GRAPHIC0, 69 CS_GRAPHIC1, 70 CS_UK, 71 CS_USA, 72 CS_MULTI, 73 CS_GER, 74 CS_FIN 75 }; 76 77 enum escape_state { 78 ESC_START = 1, 79 ESC_CSI = 2, 80 ESC_STR = 4, /* DCS, OSC, PM, APC */ 81 ESC_ALTCHARSET = 8, 82 ESC_STR_END = 16, /* a final string was encountered */ 83 ESC_TEST = 32, /* Enter in test mode */ 84 ESC_UTF8 = 64, 85 }; 86 87 typedef struct { 88 Glyph attr; /* current char attributes */ 89 int x; 90 int y; 91 char state; 92 } TCursor; 93 94 typedef struct { 95 int mode; 96 int type; 97 int snap; 98 /* 99 * Selection variables: 100 * nb – normalized coordinates of the beginning of the selection 101 * ne – normalized coordinates of the end of the selection 102 * ob – original coordinates of the beginning of the selection 103 * oe – original coordinates of the end of the selection 104 */ 105 struct { 106 int x, y; 107 } nb, ne, ob, oe; 108 109 int alt; 110 } Selection; 111 112 /* Internal representation of the screen */ 113 typedef struct { 114 int row; /* nb row */ 115 int col; /* nb col */ 116 Line *line; /* screen */ 117 Line *alt; /* alternate screen */ 118 int *dirty; /* dirtyness of lines */ 119 TCursor c; /* cursor */ 120 int ocx; /* old cursor col */ 121 int ocy; /* old cursor row */ 122 int top; /* top scroll limit */ 123 int bot; /* bottom scroll limit */ 124 int mode; /* terminal mode flags */ 125 int esc; /* escape state flags */ 126 char trantbl[4]; /* charset table translation */ 127 int charset; /* current charset */ 128 int icharset; /* selected charset for sequence */ 129 int *tabs; 130 Rune lastc; /* last printed char outside of sequence, 0 if control */ 131 } Term; 132 133 /* CSI Escape sequence structs */ 134 /* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */ 135 typedef struct { 136 char buf[ESC_BUF_SIZ]; /* raw string */ 137 size_t len; /* raw string length */ 138 char priv; 139 int arg[ESC_ARG_SIZ]; 140 int narg; /* nb of args */ 141 char mode[2]; 142 } CSIEscape; 143 144 /* STR Escape sequence structs */ 145 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */ 146 typedef struct { 147 char type; /* ESC type ... */ 148 char *buf; /* allocated raw string */ 149 size_t siz; /* allocation size */ 150 size_t len; /* raw string length */ 151 char *args[STR_ARG_SIZ]; 152 int narg; /* nb of args */ 153 } STREscape; 154 155 static void execsh(char *, char **); 156 static void stty(char **); 157 static void sigchld(int); 158 static void ttywriteraw(const char *, size_t); 159 160 static void csidump(void); 161 static void csihandle(void); 162 static void csiparse(void); 163 static void csireset(void); 164 static void osc_color_response(int, int, int); 165 static int eschandle(uchar); 166 static void strdump(void); 167 static void strhandle(void); 168 static void strparse(void); 169 static void strreset(void); 170 171 static void tprinter(char *, size_t); 172 static void tdumpsel(void); 173 static void tdumpline(int); 174 static void tdump(void); 175 static void tclearregion(int, int, int, int); 176 static void tcursor(int); 177 static void tdeletechar(int); 178 static void tdeleteline(int); 179 static void tinsertblank(int); 180 static void tinsertblankline(int); 181 static int tlinelen(int); 182 static void tmoveto(int, int); 183 static void tmoveato(int, int); 184 static void tnewline(int); 185 static void tputtab(int); 186 static void tputc(Rune); 187 static void treset(void); 188 static void tscrollup(int, int); 189 static void tscrolldown(int, int); 190 static void tsetattr(const int *, int); 191 static void tsetchar(Rune, const Glyph *, int, int); 192 static void tsetdirt(int, int); 193 static void tsetscroll(int, int); 194 static void tswapscreen(void); 195 static void tsetmode(int, int, const int *, int); 196 static int twrite(const char *, int, int); 197 static void tfulldirt(void); 198 static void tcontrolcode(uchar ); 199 static void tdectest(char ); 200 static void tdefutf8(char); 201 static int32_t tdefcolor(const int *, int *, int); 202 static void tdeftran(char); 203 static void tstrsequence(uchar); 204 205 static void drawregion(int, int, int, int); 206 207 static void selnormalize(void); 208 static void selscroll(int, int); 209 static void selsnap(int *, int *, int); 210 211 static size_t utf8decode(const char *, Rune *, size_t); 212 static Rune utf8decodebyte(char, size_t *); 213 static char utf8encodebyte(Rune, size_t); 214 static size_t utf8validate(Rune *, size_t); 215 216 static char *base64dec(const char *); 217 static char base64dec_getc(const char **); 218 219 static ssize_t xwrite(int, const char *, size_t); 220 221 /* Globals */ 222 static Term term; 223 static Selection sel; 224 static CSIEscape csiescseq; 225 static STREscape strescseq; 226 static int iofd = 1; 227 static int cmdfd; 228 static pid_t pid; 229 230 static const uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0}; 231 static const uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8}; 232 static const Rune utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000}; 233 static const Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF}; 234 235 ssize_t 236 xwrite(int fd, const char *s, size_t len) 237 { 238 size_t aux = len; 239 ssize_t r; 240 241 while (len > 0) { 242 r = write(fd, s, len); 243 if (r < 0) 244 return r; 245 len -= r; 246 s += r; 247 } 248 249 return aux; 250 } 251 252 void * 253 xmalloc(size_t len) 254 { 255 void *p; 256 257 if (!(p = malloc(len))) 258 die("malloc: %s\n", strerror(errno)); 259 260 return p; 261 } 262 263 void * 264 xrealloc(void *p, size_t len) 265 { 266 if ((p = realloc(p, len)) == NULL) 267 die("realloc: %s\n", strerror(errno)); 268 269 return p; 270 } 271 272 char * 273 xstrdup(const char *s) 274 { 275 char *p; 276 277 if ((p = strdup(s)) == NULL) 278 die("strdup: %s\n", strerror(errno)); 279 280 return p; 281 } 282 283 size_t 284 utf8decode(const char *c, Rune *u, size_t clen) 285 { 286 size_t i, j, len, type; 287 Rune udecoded; 288 289 *u = UTF_INVALID; 290 if (!clen) 291 return 0; 292 udecoded = utf8decodebyte(c[0], &len); 293 if (!BETWEEN(len, 1, UTF_SIZ)) 294 return 1; 295 for (i = 1, j = 1; i < clen && j < len; ++i, ++j) { 296 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type); 297 if (type != 0) 298 return j; 299 } 300 if (j < len) 301 return 0; 302 *u = udecoded; 303 utf8validate(u, len); 304 305 return len; 306 } 307 308 Rune 309 utf8decodebyte(char c, size_t *i) 310 { 311 for (*i = 0; *i < LEN(utfmask); ++(*i)) 312 if (((uchar)c & utfmask[*i]) == utfbyte[*i]) 313 return (uchar)c & ~utfmask[*i]; 314 315 return 0; 316 } 317 318 size_t 319 utf8encode(Rune u, char *c) 320 { 321 size_t len, i; 322 323 len = utf8validate(&u, 0); 324 if (len > UTF_SIZ) 325 return 0; 326 327 for (i = len - 1; i != 0; --i) { 328 c[i] = utf8encodebyte(u, 0); 329 u >>= 6; 330 } 331 c[0] = utf8encodebyte(u, len); 332 333 return len; 334 } 335 336 char 337 utf8encodebyte(Rune u, size_t i) 338 { 339 return utfbyte[i] | (u & ~utfmask[i]); 340 } 341 342 size_t 343 utf8validate(Rune *u, size_t i) 344 { 345 if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF)) 346 *u = UTF_INVALID; 347 for (i = 1; *u > utfmax[i]; ++i) 348 ; 349 350 return i; 351 } 352 353 char 354 base64dec_getc(const char **src) 355 { 356 while (**src && !isprint((unsigned char)**src)) 357 (*src)++; 358 return **src ? *((*src)++) : '='; /* emulate padding if string ends */ 359 } 360 361 char * 362 base64dec(const char *src) 363 { 364 size_t in_len = strlen(src); 365 char *result, *dst; 366 static const char base64_digits[256] = { 367 [43] = 62, 0, 0, 0, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 368 0, 0, 0, -1, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 369 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 0, 0, 0, 370 0, 0, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 371 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51 372 }; 373 374 if (in_len % 4) 375 in_len += 4 - (in_len % 4); 376 result = dst = xmalloc(in_len / 4 * 3 + 1); 377 while (*src) { 378 int a = base64_digits[(unsigned char) base64dec_getc(&src)]; 379 int b = base64_digits[(unsigned char) base64dec_getc(&src)]; 380 int c = base64_digits[(unsigned char) base64dec_getc(&src)]; 381 int d = base64_digits[(unsigned char) base64dec_getc(&src)]; 382 383 /* invalid input. 'a' can be -1, e.g. if src is "\n" (c-str) */ 384 if (a == -1 || b == -1) 385 break; 386 387 *dst++ = (a << 2) | ((b & 0x30) >> 4); 388 if (c == -1) 389 break; 390 *dst++ = ((b & 0x0f) << 4) | ((c & 0x3c) >> 2); 391 if (d == -1) 392 break; 393 *dst++ = ((c & 0x03) << 6) | d; 394 } 395 *dst = '\0'; 396 return result; 397 } 398 399 void 400 selinit(void) 401 { 402 sel.mode = SEL_IDLE; 403 sel.snap = 0; 404 sel.ob.x = -1; 405 } 406 407 int 408 tlinelen(int y) 409 { 410 int i = term.col; 411 412 if (term.line[y][i - 1].mode & ATTR_WRAP) 413 return i; 414 415 while (i > 0 && term.line[y][i - 1].u == ' ') 416 --i; 417 418 return i; 419 } 420 421 void 422 selstart(int col, int row, int snap) 423 { 424 selclear(); 425 sel.mode = SEL_EMPTY; 426 sel.type = SEL_REGULAR; 427 sel.alt = IS_SET(MODE_ALTSCREEN); 428 sel.snap = snap; 429 sel.oe.x = sel.ob.x = col; 430 sel.oe.y = sel.ob.y = row; 431 selnormalize(); 432 433 if (sel.snap != 0) 434 sel.mode = SEL_READY; 435 tsetdirt(sel.nb.y, sel.ne.y); 436 } 437 438 void 439 selextend(int col, int row, int type, int done) 440 { 441 int oldey, oldex, oldsby, oldsey, oldtype; 442 443 if (sel.mode == SEL_IDLE) 444 return; 445 if (done && sel.mode == SEL_EMPTY) { 446 selclear(); 447 return; 448 } 449 450 oldey = sel.oe.y; 451 oldex = sel.oe.x; 452 oldsby = sel.nb.y; 453 oldsey = sel.ne.y; 454 oldtype = sel.type; 455 456 sel.oe.x = col; 457 sel.oe.y = row; 458 selnormalize(); 459 sel.type = type; 460 461 if (oldey != sel.oe.y || oldex != sel.oe.x || oldtype != sel.type || sel.mode == SEL_EMPTY) 462 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey)); 463 464 sel.mode = done ? SEL_IDLE : SEL_READY; 465 } 466 467 void 468 selnormalize(void) 469 { 470 int i; 471 472 if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) { 473 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x; 474 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x; 475 } else { 476 sel.nb.x = MIN(sel.ob.x, sel.oe.x); 477 sel.ne.x = MAX(sel.ob.x, sel.oe.x); 478 } 479 sel.nb.y = MIN(sel.ob.y, sel.oe.y); 480 sel.ne.y = MAX(sel.ob.y, sel.oe.y); 481 482 selsnap(&sel.nb.x, &sel.nb.y, -1); 483 selsnap(&sel.ne.x, &sel.ne.y, +1); 484 485 /* expand selection over line breaks */ 486 if (sel.type == SEL_RECTANGULAR) 487 return; 488 i = tlinelen(sel.nb.y); 489 if (i < sel.nb.x) 490 sel.nb.x = i; 491 if (tlinelen(sel.ne.y) <= sel.ne.x) 492 sel.ne.x = term.col - 1; 493 } 494 495 int 496 selected(int x, int y) 497 { 498 if (sel.mode == SEL_EMPTY || sel.ob.x == -1 || 499 sel.alt != IS_SET(MODE_ALTSCREEN)) 500 return 0; 501 502 if (sel.type == SEL_RECTANGULAR) 503 return BETWEEN(y, sel.nb.y, sel.ne.y) 504 && BETWEEN(x, sel.nb.x, sel.ne.x); 505 506 return BETWEEN(y, sel.nb.y, sel.ne.y) 507 && (y != sel.nb.y || x >= sel.nb.x) 508 && (y != sel.ne.y || x <= sel.ne.x); 509 } 510 511 void 512 selsnap(int *x, int *y, int direction) 513 { 514 int newx, newy, xt, yt; 515 int delim, prevdelim; 516 const Glyph *gp, *prevgp; 517 518 switch (sel.snap) { 519 case SNAP_WORD: 520 /* 521 * Snap around if the word wraps around at the end or 522 * beginning of a line. 523 */ 524 prevgp = &term.line[*y][*x]; 525 prevdelim = ISDELIM(prevgp->u); 526 for (;;) { 527 newx = *x + direction; 528 newy = *y; 529 if (!BETWEEN(newx, 0, term.col - 1)) { 530 newy += direction; 531 newx = (newx + term.col) % term.col; 532 if (!BETWEEN(newy, 0, term.row - 1)) 533 break; 534 535 if (direction > 0) 536 yt = *y, xt = *x; 537 else 538 yt = newy, xt = newx; 539 if (!(term.line[yt][xt].mode & ATTR_WRAP)) 540 break; 541 } 542 543 if (newx >= tlinelen(newy)) 544 break; 545 546 gp = &term.line[newy][newx]; 547 delim = ISDELIM(gp->u); 548 if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim 549 || (delim && gp->u != prevgp->u))) 550 break; 551 552 *x = newx; 553 *y = newy; 554 prevgp = gp; 555 prevdelim = delim; 556 } 557 break; 558 case SNAP_LINE: 559 /* 560 * Snap around if the the previous line or the current one 561 * has set ATTR_WRAP at its end. Then the whole next or 562 * previous line will be selected. 563 */ 564 *x = (direction < 0) ? 0 : term.col - 1; 565 if (direction < 0) { 566 for (; *y > 0; *y += direction) { 567 if (!(term.line[*y-1][term.col-1].mode 568 & ATTR_WRAP)) { 569 break; 570 } 571 } 572 } else if (direction > 0) { 573 for (; *y < term.row-1; *y += direction) { 574 if (!(term.line[*y][term.col-1].mode 575 & ATTR_WRAP)) { 576 break; 577 } 578 } 579 } 580 break; 581 } 582 } 583 584 char * 585 getsel(void) 586 { 587 char *str, *ptr; 588 int y, bufsize, lastx, linelen; 589 const Glyph *gp, *last; 590 591 if (sel.ob.x == -1) 592 return NULL; 593 594 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ; 595 ptr = str = xmalloc(bufsize); 596 597 /* append every set & selected glyph to the selection */ 598 for (y = sel.nb.y; y <= sel.ne.y; y++) { 599 if ((linelen = tlinelen(y)) == 0) { 600 *ptr++ = '\n'; 601 continue; 602 } 603 604 if (sel.type == SEL_RECTANGULAR) { 605 gp = &term.line[y][sel.nb.x]; 606 lastx = sel.ne.x; 607 } else { 608 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0]; 609 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1; 610 } 611 last = &term.line[y][MIN(lastx, linelen-1)]; 612 while (last >= gp && last->u == ' ') 613 --last; 614 615 for ( ; gp <= last; ++gp) { 616 if (gp->mode & ATTR_WDUMMY) 617 continue; 618 619 ptr += utf8encode(gp->u, ptr); 620 } 621 622 /* 623 * Copy and pasting of line endings is inconsistent 624 * in the inconsistent terminal and GUI world. 625 * The best solution seems like to produce '\n' when 626 * something is copied from st and convert '\n' to 627 * '\r', when something to be pasted is received by 628 * st. 629 * FIXME: Fix the computer world. 630 */ 631 if ((y < sel.ne.y || lastx >= linelen) && 632 (!(last->mode & ATTR_WRAP) || sel.type == SEL_RECTANGULAR)) 633 *ptr++ = '\n'; 634 } 635 *ptr = 0; 636 return str; 637 } 638 639 void 640 selclear(void) 641 { 642 if (sel.ob.x == -1) 643 return; 644 sel.mode = SEL_IDLE; 645 sel.ob.x = -1; 646 tsetdirt(sel.nb.y, sel.ne.y); 647 } 648 649 void 650 die(const char *errstr, ...) 651 { 652 va_list ap; 653 654 va_start(ap, errstr); 655 vfprintf(stderr, errstr, ap); 656 va_end(ap); 657 exit(1); 658 } 659 660 void 661 execsh(char *cmd, char **args) 662 { 663 char *sh, *prog, *arg; 664 const struct passwd *pw; 665 666 errno = 0; 667 if ((pw = getpwuid(getuid())) == NULL) { 668 if (errno) 669 die("getpwuid: %s\n", strerror(errno)); 670 else 671 die("who are you?\n"); 672 } 673 674 if ((sh = getenv("SHELL")) == NULL) 675 sh = (pw->pw_shell[0]) ? pw->pw_shell : cmd; 676 677 if (args) { 678 prog = args[0]; 679 arg = NULL; 680 } else if (scroll) { 681 prog = scroll; 682 arg = utmp ? utmp : sh; 683 } else if (utmp) { 684 prog = utmp; 685 arg = NULL; 686 } else { 687 prog = sh; 688 arg = NULL; 689 } 690 DEFAULT(args, ((char *[]) {prog, arg, NULL})); 691 692 unsetenv("COLUMNS"); 693 unsetenv("LINES"); 694 unsetenv("TERMCAP"); 695 setenv("LOGNAME", pw->pw_name, 1); 696 setenv("USER", pw->pw_name, 1); 697 setenv("SHELL", sh, 1); 698 setenv("HOME", pw->pw_dir, 1); 699 setenv("TERM", termname, 1); 700 701 signal(SIGCHLD, SIG_DFL); 702 signal(SIGHUP, SIG_DFL); 703 signal(SIGINT, SIG_DFL); 704 signal(SIGQUIT, SIG_DFL); 705 signal(SIGTERM, SIG_DFL); 706 signal(SIGALRM, SIG_DFL); 707 708 execvp(prog, args); 709 _exit(1); 710 } 711 712 void 713 sigchld(int a) 714 { 715 int stat; 716 pid_t p; 717 718 if ((p = waitpid(pid, &stat, WNOHANG)) < 0) 719 die("waiting for pid %hd failed: %s\n", pid, strerror(errno)); 720 721 if (pid != p) 722 return; 723 724 if (WIFEXITED(stat) && WEXITSTATUS(stat)) 725 die("child exited with status %d\n", WEXITSTATUS(stat)); 726 else if (WIFSIGNALED(stat)) 727 die("child terminated due to signal %d\n", WTERMSIG(stat)); 728 _exit(0); 729 } 730 731 void 732 stty(char **args) 733 { 734 char cmd[_POSIX_ARG_MAX], **p, *q, *s; 735 size_t n, siz; 736 737 if ((n = strlen(stty_args)) > sizeof(cmd)-1) 738 die("incorrect stty parameters\n"); 739 memcpy(cmd, stty_args, n); 740 q = cmd + n; 741 siz = sizeof(cmd) - n; 742 for (p = args; p && (s = *p); ++p) { 743 if ((n = strlen(s)) > siz-1) 744 die("stty parameter length too long\n"); 745 *q++ = ' '; 746 memcpy(q, s, n); 747 q += n; 748 siz -= n + 1; 749 } 750 *q = '\0'; 751 if (system(cmd) != 0) 752 perror("Couldn't call stty"); 753 } 754 755 int 756 ttynew(const char *line, char *cmd, const char *out, char **args) 757 { 758 int m, s; 759 760 if (out) { 761 term.mode |= MODE_PRINT; 762 iofd = (!strcmp(out, "-")) ? 763 1 : open(out, O_WRONLY | O_CREAT, 0666); 764 if (iofd < 0) { 765 fprintf(stderr, "Error opening %s:%s\n", 766 out, strerror(errno)); 767 } 768 } 769 770 if (line) { 771 if ((cmdfd = open(line, O_RDWR)) < 0) 772 die("open line '%s' failed: %s\n", 773 line, strerror(errno)); 774 dup2(cmdfd, 0); 775 stty(args); 776 return cmdfd; 777 } 778 779 /* seems to work fine on linux, openbsd and freebsd */ 780 if (openpty(&m, &s, NULL, NULL, NULL) < 0) 781 die("openpty failed: %s\n", strerror(errno)); 782 783 switch (pid = fork()) { 784 case -1: 785 die("fork failed: %s\n", strerror(errno)); 786 break; 787 case 0: 788 close(iofd); 789 close(m); 790 setsid(); /* create a new process group */ 791 dup2(s, 0); 792 dup2(s, 1); 793 dup2(s, 2); 794 if (ioctl(s, TIOCSCTTY, NULL) < 0) 795 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno)); 796 if (s > 2) 797 close(s); 798 #ifdef __OpenBSD__ 799 if (pledge("stdio getpw proc exec", NULL) == -1) 800 die("pledge\n"); 801 #endif 802 execsh(cmd, args); 803 break; 804 default: 805 #ifdef __OpenBSD__ 806 if (pledge("stdio rpath tty proc", NULL) == -1) 807 die("pledge\n"); 808 #endif 809 close(s); 810 cmdfd = m; 811 signal(SIGCHLD, sigchld); 812 break; 813 } 814 return cmdfd; 815 } 816 817 size_t 818 ttyread(void) 819 { 820 static char buf[BUFSIZ]; 821 static int buflen = 0; 822 int ret, written; 823 824 /* append read bytes to unprocessed bytes */ 825 ret = read(cmdfd, buf+buflen, LEN(buf)-buflen); 826 827 switch (ret) { 828 case 0: 829 exit(0); 830 case -1: 831 die("couldn't read from shell: %s\n", strerror(errno)); 832 default: 833 buflen += ret; 834 written = twrite(buf, buflen, 0); 835 buflen -= written; 836 /* keep any incomplete UTF-8 byte sequence for the next call */ 837 if (buflen > 0) 838 memmove(buf, buf + written, buflen); 839 return ret; 840 } 841 } 842 843 void 844 ttywrite(const char *s, size_t n, int may_echo) 845 { 846 const char *next; 847 848 if (may_echo && IS_SET(MODE_ECHO)) 849 twrite(s, n, 1); 850 851 if (!IS_SET(MODE_CRLF)) { 852 ttywriteraw(s, n); 853 return; 854 } 855 856 /* This is similar to how the kernel handles ONLCR for ttys */ 857 while (n > 0) { 858 if (*s == '\r') { 859 next = s + 1; 860 ttywriteraw("\r\n", 2); 861 } else { 862 next = memchr(s, '\r', n); 863 DEFAULT(next, s + n); 864 ttywriteraw(s, next - s); 865 } 866 n -= next - s; 867 s = next; 868 } 869 } 870 871 void 872 ttywriteraw(const char *s, size_t n) 873 { 874 fd_set wfd, rfd; 875 ssize_t r; 876 size_t lim = 256; 877 878 /* 879 * Remember that we are using a pty, which might be a modem line. 880 * Writing too much will clog the line. That's why we are doing this 881 * dance. 882 * FIXME: Migrate the world to Plan 9. 883 */ 884 while (n > 0) { 885 FD_ZERO(&wfd); 886 FD_ZERO(&rfd); 887 FD_SET(cmdfd, &wfd); 888 FD_SET(cmdfd, &rfd); 889 890 /* Check if we can write. */ 891 if (pselect(cmdfd+1, &rfd, &wfd, NULL, NULL, NULL) < 0) { 892 if (errno == EINTR) 893 continue; 894 die("select failed: %s\n", strerror(errno)); 895 } 896 if (FD_ISSET(cmdfd, &wfd)) { 897 /* 898 * Only write the bytes written by ttywrite() or the 899 * default of 256. This seems to be a reasonable value 900 * for a serial line. Bigger values might clog the I/O. 901 */ 902 if ((r = write(cmdfd, s, (n < lim)? n : lim)) < 0) 903 goto write_error; 904 if (r < n) { 905 /* 906 * We weren't able to write out everything. 907 * This means the buffer is getting full 908 * again. Empty it. 909 */ 910 if (n < lim) 911 lim = ttyread(); 912 n -= r; 913 s += r; 914 } else { 915 /* All bytes have been written. */ 916 break; 917 } 918 } 919 if (FD_ISSET(cmdfd, &rfd)) 920 lim = ttyread(); 921 } 922 return; 923 924 write_error: 925 die("write error on tty: %s\n", strerror(errno)); 926 } 927 928 void 929 ttyresize(int tw, int th) 930 { 931 struct winsize w; 932 933 w.ws_row = term.row; 934 w.ws_col = term.col; 935 w.ws_xpixel = tw; 936 w.ws_ypixel = th; 937 if (ioctl(cmdfd, TIOCSWINSZ, &w) < 0) 938 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno)); 939 } 940 941 void 942 ttyhangup(void) 943 { 944 /* Send SIGHUP to shell */ 945 kill(pid, SIGHUP); 946 } 947 948 int 949 tattrset(int attr) 950 { 951 int i, j; 952 953 for (i = 0; i < term.row-1; i++) { 954 for (j = 0; j < term.col-1; j++) { 955 if (term.line[i][j].mode & attr) 956 return 1; 957 } 958 } 959 960 return 0; 961 } 962 963 void 964 tsetdirt(int top, int bot) 965 { 966 int i; 967 968 LIMIT(top, 0, term.row-1); 969 LIMIT(bot, 0, term.row-1); 970 971 for (i = top; i <= bot; i++) 972 term.dirty[i] = 1; 973 } 974 975 void 976 tsetdirtattr(int attr) 977 { 978 int i, j; 979 980 for (i = 0; i < term.row-1; i++) { 981 for (j = 0; j < term.col-1; j++) { 982 if (term.line[i][j].mode & attr) { 983 tsetdirt(i, i); 984 break; 985 } 986 } 987 } 988 } 989 990 void 991 tfulldirt(void) 992 { 993 tsetdirt(0, term.row-1); 994 } 995 996 void 997 tcursor(int mode) 998 { 999 static TCursor c[2]; 1000 int alt = IS_SET(MODE_ALTSCREEN); 1001 1002 if (mode == CURSOR_SAVE) { 1003 c[alt] = term.c; 1004 } else if (mode == CURSOR_LOAD) { 1005 term.c = c[alt]; 1006 tmoveto(c[alt].x, c[alt].y); 1007 } 1008 } 1009 1010 void 1011 treset(void) 1012 { 1013 uint i; 1014 1015 term.c = (TCursor){{ 1016 .mode = ATTR_NULL, 1017 .fg = defaultfg, 1018 .bg = defaultbg 1019 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT}; 1020 1021 memset(term.tabs, 0, term.col * sizeof(*term.tabs)); 1022 for (i = tabspaces; i < term.col; i += tabspaces) 1023 term.tabs[i] = 1; 1024 term.top = 0; 1025 term.bot = term.row - 1; 1026 term.mode = MODE_WRAP|MODE_UTF8; 1027 memset(term.trantbl, CS_USA, sizeof(term.trantbl)); 1028 term.charset = 0; 1029 1030 for (i = 0; i < 2; i++) { 1031 tmoveto(0, 0); 1032 tcursor(CURSOR_SAVE); 1033 tclearregion(0, 0, term.col-1, term.row-1); 1034 tswapscreen(); 1035 } 1036 } 1037 1038 void 1039 tnew(int col, int row) 1040 { 1041 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } }; 1042 tresize(col, row); 1043 treset(); 1044 } 1045 1046 void 1047 tswapscreen(void) 1048 { 1049 Line *tmp = term.line; 1050 1051 term.line = term.alt; 1052 term.alt = tmp; 1053 term.mode ^= MODE_ALTSCREEN; 1054 tfulldirt(); 1055 } 1056 1057 void 1058 tscrolldown(int orig, int n) 1059 { 1060 int i; 1061 Line temp; 1062 1063 LIMIT(n, 0, term.bot-orig+1); 1064 1065 tsetdirt(orig, term.bot-n); 1066 tclearregion(0, term.bot-n+1, term.col-1, term.bot); 1067 1068 for (i = term.bot; i >= orig+n; i--) { 1069 temp = term.line[i]; 1070 term.line[i] = term.line[i-n]; 1071 term.line[i-n] = temp; 1072 } 1073 1074 selscroll(orig, n); 1075 } 1076 1077 void 1078 tscrollup(int orig, int n) 1079 { 1080 int i; 1081 Line temp; 1082 1083 LIMIT(n, 0, term.bot-orig+1); 1084 1085 tclearregion(0, orig, term.col-1, orig+n-1); 1086 tsetdirt(orig+n, term.bot); 1087 1088 for (i = orig; i <= term.bot-n; i++) { 1089 temp = term.line[i]; 1090 term.line[i] = term.line[i+n]; 1091 term.line[i+n] = temp; 1092 } 1093 1094 selscroll(orig, -n); 1095 } 1096 1097 void 1098 selscroll(int orig, int n) 1099 { 1100 if (sel.ob.x == -1 || sel.alt != IS_SET(MODE_ALTSCREEN)) 1101 return; 1102 1103 if (BETWEEN(sel.nb.y, orig, term.bot) != BETWEEN(sel.ne.y, orig, term.bot)) { 1104 selclear(); 1105 } else if (BETWEEN(sel.nb.y, orig, term.bot)) { 1106 sel.ob.y += n; 1107 sel.oe.y += n; 1108 if (sel.ob.y < term.top || sel.ob.y > term.bot || 1109 sel.oe.y < term.top || sel.oe.y > term.bot) { 1110 selclear(); 1111 } else { 1112 selnormalize(); 1113 } 1114 } 1115 } 1116 1117 void 1118 tnewline(int first_col) 1119 { 1120 int y = term.c.y; 1121 1122 if (y == term.bot) { 1123 tscrollup(term.top, 1); 1124 } else { 1125 y++; 1126 } 1127 tmoveto(first_col ? 0 : term.c.x, y); 1128 } 1129 1130 void 1131 csiparse(void) 1132 { 1133 char *p = csiescseq.buf, *np; 1134 long int v; 1135 int sep = ';'; /* colon or semi-colon, but not both */ 1136 1137 csiescseq.narg = 0; 1138 if (*p == '?') { 1139 csiescseq.priv = 1; 1140 p++; 1141 } 1142 1143 csiescseq.buf[csiescseq.len] = '\0'; 1144 while (p < csiescseq.buf+csiescseq.len) { 1145 np = NULL; 1146 v = strtol(p, &np, 10); 1147 if (np == p) 1148 v = 0; 1149 if (v == LONG_MAX || v == LONG_MIN) 1150 v = -1; 1151 csiescseq.arg[csiescseq.narg++] = v; 1152 p = np; 1153 if (sep == ';' && *p == ':') 1154 sep = ':'; /* allow override to colon once */ 1155 if (*p != sep || csiescseq.narg == ESC_ARG_SIZ) 1156 break; 1157 p++; 1158 } 1159 csiescseq.mode[0] = *p++; 1160 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0'; 1161 } 1162 1163 /* for absolute user moves, when decom is set */ 1164 void 1165 tmoveato(int x, int y) 1166 { 1167 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0)); 1168 } 1169 1170 void 1171 tmoveto(int x, int y) 1172 { 1173 int miny, maxy; 1174 1175 if (term.c.state & CURSOR_ORIGIN) { 1176 miny = term.top; 1177 maxy = term.bot; 1178 } else { 1179 miny = 0; 1180 maxy = term.row - 1; 1181 } 1182 term.c.state &= ~CURSOR_WRAPNEXT; 1183 term.c.x = LIMIT(x, 0, term.col-1); 1184 term.c.y = LIMIT(y, miny, maxy); 1185 } 1186 1187 void 1188 tsetchar(Rune u, const Glyph *attr, int x, int y) 1189 { 1190 static const char *vt100_0[62] = { /* 0x41 - 0x7e */ 1191 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */ 1192 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */ 1193 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */ 1194 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */ 1195 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */ 1196 "", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */ 1197 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */ 1198 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */ 1199 }; 1200 1201 /* 1202 * The table is proudly stolen from rxvt. 1203 */ 1204 if (term.trantbl[term.charset] == CS_GRAPHIC0 && 1205 BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41]) 1206 utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ); 1207 1208 if (term.line[y][x].mode & ATTR_WIDE) { 1209 if (x+1 < term.col) { 1210 term.line[y][x+1].u = ' '; 1211 term.line[y][x+1].mode &= ~ATTR_WDUMMY; 1212 } 1213 } else if (term.line[y][x].mode & ATTR_WDUMMY) { 1214 term.line[y][x-1].u = ' '; 1215 term.line[y][x-1].mode &= ~ATTR_WIDE; 1216 } 1217 1218 term.dirty[y] = 1; 1219 term.line[y][x] = *attr; 1220 term.line[y][x].u = u; 1221 1222 if (isboxdraw(u)) 1223 term.line[y][x].mode |= ATTR_BOXDRAW; 1224 } 1225 1226 void 1227 tclearregion(int x1, int y1, int x2, int y2) 1228 { 1229 int x, y, temp; 1230 Glyph *gp; 1231 1232 if (x1 > x2) 1233 temp = x1, x1 = x2, x2 = temp; 1234 if (y1 > y2) 1235 temp = y1, y1 = y2, y2 = temp; 1236 1237 LIMIT(x1, 0, term.col-1); 1238 LIMIT(x2, 0, term.col-1); 1239 LIMIT(y1, 0, term.row-1); 1240 LIMIT(y2, 0, term.row-1); 1241 1242 for (y = y1; y <= y2; y++) { 1243 term.dirty[y] = 1; 1244 for (x = x1; x <= x2; x++) { 1245 gp = &term.line[y][x]; 1246 if (selected(x, y)) 1247 selclear(); 1248 gp->fg = term.c.attr.fg; 1249 gp->bg = term.c.attr.bg; 1250 gp->mode = 0; 1251 gp->u = ' '; 1252 } 1253 } 1254 } 1255 1256 void 1257 tdeletechar(int n) 1258 { 1259 int dst, src, size; 1260 Glyph *line; 1261 1262 LIMIT(n, 0, term.col - term.c.x); 1263 1264 dst = term.c.x; 1265 src = term.c.x + n; 1266 size = term.col - src; 1267 line = term.line[term.c.y]; 1268 1269 memmove(&line[dst], &line[src], size * sizeof(Glyph)); 1270 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y); 1271 } 1272 1273 void 1274 tinsertblank(int n) 1275 { 1276 int dst, src, size; 1277 Glyph *line; 1278 1279 LIMIT(n, 0, term.col - term.c.x); 1280 1281 dst = term.c.x + n; 1282 src = term.c.x; 1283 size = term.col - dst; 1284 line = term.line[term.c.y]; 1285 1286 memmove(&line[dst], &line[src], size * sizeof(Glyph)); 1287 tclearregion(src, term.c.y, dst - 1, term.c.y); 1288 } 1289 1290 void 1291 tinsertblankline(int n) 1292 { 1293 if (BETWEEN(term.c.y, term.top, term.bot)) 1294 tscrolldown(term.c.y, n); 1295 } 1296 1297 void 1298 tdeleteline(int n) 1299 { 1300 if (BETWEEN(term.c.y, term.top, term.bot)) 1301 tscrollup(term.c.y, n); 1302 } 1303 1304 int32_t 1305 tdefcolor(const int *attr, int *npar, int l) 1306 { 1307 int32_t idx = -1; 1308 uint r, g, b; 1309 1310 switch (attr[*npar + 1]) { 1311 case 2: /* direct color in RGB space */ 1312 if (*npar + 4 >= l) { 1313 fprintf(stderr, 1314 "erresc(38): Incorrect number of parameters (%d)\n", 1315 *npar); 1316 break; 1317 } 1318 r = attr[*npar + 2]; 1319 g = attr[*npar + 3]; 1320 b = attr[*npar + 4]; 1321 *npar += 4; 1322 if (!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255)) 1323 fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n", 1324 r, g, b); 1325 else 1326 idx = TRUECOLOR(r, g, b); 1327 break; 1328 case 5: /* indexed color */ 1329 if (*npar + 2 >= l) { 1330 fprintf(stderr, 1331 "erresc(38): Incorrect number of parameters (%d)\n", 1332 *npar); 1333 break; 1334 } 1335 *npar += 2; 1336 if (!BETWEEN(attr[*npar], 0, 255)) 1337 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]); 1338 else 1339 idx = attr[*npar]; 1340 break; 1341 case 0: /* implemented defined (only foreground) */ 1342 case 1: /* transparent */ 1343 case 3: /* direct color in CMY space */ 1344 case 4: /* direct color in CMYK space */ 1345 default: 1346 fprintf(stderr, 1347 "erresc(38): gfx attr %d unknown\n", attr[*npar]); 1348 break; 1349 } 1350 1351 return idx; 1352 } 1353 1354 void 1355 tsetattr(const int *attr, int l) 1356 { 1357 int i; 1358 int32_t idx; 1359 1360 for (i = 0; i < l; i++) { 1361 switch (attr[i]) { 1362 case 0: 1363 term.c.attr.mode &= ~( 1364 ATTR_BOLD | 1365 ATTR_FAINT | 1366 ATTR_ITALIC | 1367 ATTR_UNDERLINE | 1368 ATTR_BLINK | 1369 ATTR_REVERSE | 1370 ATTR_INVISIBLE | 1371 ATTR_STRUCK ); 1372 term.c.attr.fg = defaultfg; 1373 term.c.attr.bg = defaultbg; 1374 break; 1375 case 1: 1376 term.c.attr.mode |= ATTR_BOLD; 1377 break; 1378 case 2: 1379 term.c.attr.mode |= ATTR_FAINT; 1380 break; 1381 case 3: 1382 term.c.attr.mode |= ATTR_ITALIC; 1383 break; 1384 case 4: 1385 term.c.attr.mode |= ATTR_UNDERLINE; 1386 break; 1387 case 5: /* slow blink */ 1388 /* FALLTHROUGH */ 1389 case 6: /* rapid blink */ 1390 term.c.attr.mode |= ATTR_BLINK; 1391 break; 1392 case 7: 1393 term.c.attr.mode |= ATTR_REVERSE; 1394 break; 1395 case 8: 1396 term.c.attr.mode |= ATTR_INVISIBLE; 1397 break; 1398 case 9: 1399 term.c.attr.mode |= ATTR_STRUCK; 1400 break; 1401 case 22: 1402 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT); 1403 break; 1404 case 23: 1405 term.c.attr.mode &= ~ATTR_ITALIC; 1406 break; 1407 case 24: 1408 term.c.attr.mode &= ~ATTR_UNDERLINE; 1409 break; 1410 case 25: 1411 term.c.attr.mode &= ~ATTR_BLINK; 1412 break; 1413 case 27: 1414 term.c.attr.mode &= ~ATTR_REVERSE; 1415 break; 1416 case 28: 1417 term.c.attr.mode &= ~ATTR_INVISIBLE; 1418 break; 1419 case 29: 1420 term.c.attr.mode &= ~ATTR_STRUCK; 1421 break; 1422 case 38: 1423 if ((idx = tdefcolor(attr, &i, l)) >= 0) 1424 term.c.attr.fg = idx; 1425 break; 1426 case 39: /* set foreground color to default */ 1427 term.c.attr.fg = defaultfg; 1428 break; 1429 case 48: 1430 if ((idx = tdefcolor(attr, &i, l)) >= 0) 1431 term.c.attr.bg = idx; 1432 break; 1433 case 49: /* set background color to default */ 1434 term.c.attr.bg = defaultbg; 1435 break; 1436 case 58: 1437 /* This starts a sequence to change the color of 1438 * "underline" pixels. We don't support that and 1439 * instead eat up a following "5;n" or "2;r;g;b". */ 1440 tdefcolor(attr, &i, l); 1441 break; 1442 default: 1443 if (BETWEEN(attr[i], 30, 37)) { 1444 term.c.attr.fg = attr[i] - 30; 1445 } else if (BETWEEN(attr[i], 40, 47)) { 1446 term.c.attr.bg = attr[i] - 40; 1447 } else if (BETWEEN(attr[i], 90, 97)) { 1448 term.c.attr.fg = attr[i] - 90 + 8; 1449 } else if (BETWEEN(attr[i], 100, 107)) { 1450 term.c.attr.bg = attr[i] - 100 + 8; 1451 } else { 1452 fprintf(stderr, 1453 "erresc(default): gfx attr %d unknown\n", 1454 attr[i]); 1455 csidump(); 1456 } 1457 break; 1458 } 1459 } 1460 } 1461 1462 void 1463 tsetscroll(int t, int b) 1464 { 1465 int temp; 1466 1467 LIMIT(t, 0, term.row-1); 1468 LIMIT(b, 0, term.row-1); 1469 if (t > b) { 1470 temp = t; 1471 t = b; 1472 b = temp; 1473 } 1474 term.top = t; 1475 term.bot = b; 1476 } 1477 1478 void 1479 tsetmode(int priv, int set, const int *args, int narg) 1480 { 1481 int alt; const int *lim; 1482 1483 for (lim = args + narg; args < lim; ++args) { 1484 if (priv) { 1485 switch (*args) { 1486 case 1: /* DECCKM -- Cursor key */ 1487 xsetmode(set, MODE_APPCURSOR); 1488 break; 1489 case 5: /* DECSCNM -- Reverse video */ 1490 xsetmode(set, MODE_REVERSE); 1491 break; 1492 case 6: /* DECOM -- Origin */ 1493 MODBIT(term.c.state, set, CURSOR_ORIGIN); 1494 tmoveato(0, 0); 1495 break; 1496 case 7: /* DECAWM -- Auto wrap */ 1497 MODBIT(term.mode, set, MODE_WRAP); 1498 break; 1499 case 0: /* Error (IGNORED) */ 1500 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */ 1501 case 3: /* DECCOLM -- Column (IGNORED) */ 1502 case 4: /* DECSCLM -- Scroll (IGNORED) */ 1503 case 8: /* DECARM -- Auto repeat (IGNORED) */ 1504 case 18: /* DECPFF -- Printer feed (IGNORED) */ 1505 case 19: /* DECPEX -- Printer extent (IGNORED) */ 1506 case 42: /* DECNRCM -- National characters (IGNORED) */ 1507 case 12: /* att610 -- Start blinking cursor (IGNORED) */ 1508 break; 1509 case 25: /* DECTCEM -- Text Cursor Enable Mode */ 1510 xsetmode(!set, MODE_HIDE); 1511 break; 1512 case 9: /* X10 mouse compatibility mode */ 1513 xsetpointermotion(0); 1514 xsetmode(0, MODE_MOUSE); 1515 xsetmode(set, MODE_MOUSEX10); 1516 break; 1517 case 1000: /* 1000: report button press */ 1518 xsetpointermotion(0); 1519 xsetmode(0, MODE_MOUSE); 1520 xsetmode(set, MODE_MOUSEBTN); 1521 break; 1522 case 1002: /* 1002: report motion on button press */ 1523 xsetpointermotion(0); 1524 xsetmode(0, MODE_MOUSE); 1525 xsetmode(set, MODE_MOUSEMOTION); 1526 break; 1527 case 1003: /* 1003: enable all mouse motions */ 1528 xsetpointermotion(set); 1529 xsetmode(0, MODE_MOUSE); 1530 xsetmode(set, MODE_MOUSEMANY); 1531 break; 1532 case 1004: /* 1004: send focus events to tty */ 1533 xsetmode(set, MODE_FOCUS); 1534 break; 1535 case 1006: /* 1006: extended reporting mode */ 1536 xsetmode(set, MODE_MOUSESGR); 1537 break; 1538 case 1034: /* 1034: enable 8-bit mode for keyboard input */ 1539 xsetmode(set, MODE_8BIT); 1540 break; 1541 case 1049: /* swap screen & set/restore cursor as xterm */ 1542 if (!allowaltscreen) 1543 break; 1544 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD); 1545 /* FALLTHROUGH */ 1546 case 47: /* swap screen buffer */ 1547 case 1047: /* swap screen buffer */ 1548 if (!allowaltscreen) 1549 break; 1550 alt = IS_SET(MODE_ALTSCREEN); 1551 if (alt) { 1552 tclearregion(0, 0, term.col-1, 1553 term.row-1); 1554 } 1555 if (set ^ alt) /* set is always 1 or 0 */ 1556 tswapscreen(); 1557 if (*args != 1049) 1558 break; 1559 /* FALLTHROUGH */ 1560 case 1048: /* save/restore cursor (like DECSC/DECRC) */ 1561 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD); 1562 break; 1563 case 2004: /* 2004: bracketed paste mode */ 1564 xsetmode(set, MODE_BRCKTPASTE); 1565 break; 1566 /* Not implemented mouse modes. See comments there. */ 1567 case 1001: /* mouse highlight mode; can hang the 1568 terminal by design when implemented. */ 1569 case 1005: /* UTF-8 mouse mode; will confuse 1570 applications not supporting UTF-8 1571 and luit. */ 1572 case 1015: /* urxvt mangled mouse mode; incompatible 1573 and can be mistaken for other control 1574 codes. */ 1575 break; 1576 default: 1577 fprintf(stderr, 1578 "erresc: unknown private set/reset mode %d\n", 1579 *args); 1580 break; 1581 } 1582 } else { 1583 switch (*args) { 1584 case 0: /* Error (IGNORED) */ 1585 break; 1586 case 2: 1587 xsetmode(set, MODE_KBDLOCK); 1588 break; 1589 case 4: /* IRM -- Insertion-replacement */ 1590 MODBIT(term.mode, set, MODE_INSERT); 1591 break; 1592 case 12: /* SRM -- Send/Receive */ 1593 MODBIT(term.mode, !set, MODE_ECHO); 1594 break; 1595 case 20: /* LNM -- Linefeed/new line */ 1596 MODBIT(term.mode, set, MODE_CRLF); 1597 break; 1598 default: 1599 fprintf(stderr, 1600 "erresc: unknown set/reset mode %d\n", 1601 *args); 1602 break; 1603 } 1604 } 1605 } 1606 } 1607 1608 void 1609 csihandle(void) 1610 { 1611 char buf[40]; 1612 int len; 1613 1614 switch (csiescseq.mode[0]) { 1615 default: 1616 unknown: 1617 fprintf(stderr, "erresc: unknown csi "); 1618 csidump(); 1619 /* die(""); */ 1620 break; 1621 case '@': /* ICH -- Insert <n> blank char */ 1622 DEFAULT(csiescseq.arg[0], 1); 1623 tinsertblank(csiescseq.arg[0]); 1624 break; 1625 case 'A': /* CUU -- Cursor <n> Up */ 1626 DEFAULT(csiescseq.arg[0], 1); 1627 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]); 1628 break; 1629 case 'B': /* CUD -- Cursor <n> Down */ 1630 case 'e': /* VPR --Cursor <n> Down */ 1631 DEFAULT(csiescseq.arg[0], 1); 1632 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]); 1633 break; 1634 case 'i': /* MC -- Media Copy */ 1635 switch (csiescseq.arg[0]) { 1636 case 0: 1637 tdump(); 1638 break; 1639 case 1: 1640 tdumpline(term.c.y); 1641 break; 1642 case 2: 1643 tdumpsel(); 1644 break; 1645 case 4: 1646 term.mode &= ~MODE_PRINT; 1647 break; 1648 case 5: 1649 term.mode |= MODE_PRINT; 1650 break; 1651 } 1652 break; 1653 case 'c': /* DA -- Device Attributes */ 1654 if (csiescseq.arg[0] == 0) 1655 ttywrite(vtiden, strlen(vtiden), 0); 1656 break; 1657 case 'b': /* REP -- if last char is printable print it <n> more times */ 1658 LIMIT(csiescseq.arg[0], 1, 65535); 1659 if (term.lastc) 1660 while (csiescseq.arg[0]-- > 0) 1661 tputc(term.lastc); 1662 break; 1663 case 'C': /* CUF -- Cursor <n> Forward */ 1664 case 'a': /* HPR -- Cursor <n> Forward */ 1665 DEFAULT(csiescseq.arg[0], 1); 1666 tmoveto(term.c.x+csiescseq.arg[0], term.c.y); 1667 break; 1668 case 'D': /* CUB -- Cursor <n> Backward */ 1669 DEFAULT(csiescseq.arg[0], 1); 1670 tmoveto(term.c.x-csiescseq.arg[0], term.c.y); 1671 break; 1672 case 'E': /* CNL -- Cursor <n> Down and first col */ 1673 DEFAULT(csiescseq.arg[0], 1); 1674 tmoveto(0, term.c.y+csiescseq.arg[0]); 1675 break; 1676 case 'F': /* CPL -- Cursor <n> Up and first col */ 1677 DEFAULT(csiescseq.arg[0], 1); 1678 tmoveto(0, term.c.y-csiescseq.arg[0]); 1679 break; 1680 case 'g': /* TBC -- Tabulation clear */ 1681 switch (csiescseq.arg[0]) { 1682 case 0: /* clear current tab stop */ 1683 term.tabs[term.c.x] = 0; 1684 break; 1685 case 3: /* clear all the tabs */ 1686 memset(term.tabs, 0, term.col * sizeof(*term.tabs)); 1687 break; 1688 default: 1689 goto unknown; 1690 } 1691 break; 1692 case 'G': /* CHA -- Move to <col> */ 1693 case '`': /* HPA */ 1694 DEFAULT(csiescseq.arg[0], 1); 1695 tmoveto(csiescseq.arg[0]-1, term.c.y); 1696 break; 1697 case 'H': /* CUP -- Move to <row> <col> */ 1698 case 'f': /* HVP */ 1699 DEFAULT(csiescseq.arg[0], 1); 1700 DEFAULT(csiescseq.arg[1], 1); 1701 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1); 1702 break; 1703 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */ 1704 DEFAULT(csiescseq.arg[0], 1); 1705 tputtab(csiescseq.arg[0]); 1706 break; 1707 case 'J': /* ED -- Clear screen */ 1708 switch (csiescseq.arg[0]) { 1709 case 0: /* below */ 1710 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y); 1711 if (term.c.y < term.row-1) { 1712 tclearregion(0, term.c.y+1, term.col-1, 1713 term.row-1); 1714 } 1715 break; 1716 case 1: /* above */ 1717 if (term.c.y > 0) 1718 tclearregion(0, 0, term.col-1, term.c.y-1); 1719 tclearregion(0, term.c.y, term.c.x, term.c.y); 1720 break; 1721 case 2: /* all */ 1722 tclearregion(0, 0, term.col-1, term.row-1); 1723 break; 1724 default: 1725 goto unknown; 1726 } 1727 break; 1728 case 'K': /* EL -- Clear line */ 1729 switch (csiescseq.arg[0]) { 1730 case 0: /* right */ 1731 tclearregion(term.c.x, term.c.y, term.col-1, 1732 term.c.y); 1733 break; 1734 case 1: /* left */ 1735 tclearregion(0, term.c.y, term.c.x, term.c.y); 1736 break; 1737 case 2: /* all */ 1738 tclearregion(0, term.c.y, term.col-1, term.c.y); 1739 break; 1740 } 1741 break; 1742 case 'S': /* SU -- Scroll <n> line up */ 1743 if (csiescseq.priv) break; 1744 DEFAULT(csiescseq.arg[0], 1); 1745 tscrollup(term.top, csiescseq.arg[0]); 1746 break; 1747 case 'T': /* SD -- Scroll <n> line down */ 1748 DEFAULT(csiescseq.arg[0], 1); 1749 tscrolldown(term.top, csiescseq.arg[0]); 1750 break; 1751 case 'L': /* IL -- Insert <n> blank lines */ 1752 DEFAULT(csiescseq.arg[0], 1); 1753 tinsertblankline(csiescseq.arg[0]); 1754 break; 1755 case 'l': /* RM -- Reset Mode */ 1756 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg); 1757 break; 1758 case 'M': /* DL -- Delete <n> lines */ 1759 DEFAULT(csiescseq.arg[0], 1); 1760 tdeleteline(csiescseq.arg[0]); 1761 break; 1762 case 'X': /* ECH -- Erase <n> char */ 1763 DEFAULT(csiescseq.arg[0], 1); 1764 tclearregion(term.c.x, term.c.y, 1765 term.c.x + csiescseq.arg[0] - 1, term.c.y); 1766 break; 1767 case 'P': /* DCH -- Delete <n> char */ 1768 DEFAULT(csiescseq.arg[0], 1); 1769 tdeletechar(csiescseq.arg[0]); 1770 break; 1771 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */ 1772 DEFAULT(csiescseq.arg[0], 1); 1773 tputtab(-csiescseq.arg[0]); 1774 break; 1775 case 'd': /* VPA -- Move to <row> */ 1776 DEFAULT(csiescseq.arg[0], 1); 1777 tmoveato(term.c.x, csiescseq.arg[0]-1); 1778 break; 1779 case 'h': /* SM -- Set terminal mode */ 1780 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg); 1781 break; 1782 case 'm': /* SGR -- Terminal attribute (color) */ 1783 tsetattr(csiescseq.arg, csiescseq.narg); 1784 break; 1785 case 'n': /* DSR -- Device Status Report */ 1786 switch (csiescseq.arg[0]) { 1787 case 5: /* Status Report "OK" `0n` */ 1788 ttywrite("\033[0n", sizeof("\033[0n") - 1, 0); 1789 break; 1790 case 6: /* Report Cursor Position (CPR) "<row>;<column>R" */ 1791 len = snprintf(buf, sizeof(buf), "\033[%i;%iR", 1792 term.c.y+1, term.c.x+1); 1793 ttywrite(buf, len, 0); 1794 break; 1795 default: 1796 goto unknown; 1797 } 1798 break; 1799 case 'r': /* DECSTBM -- Set Scrolling Region */ 1800 if (csiescseq.priv) { 1801 goto unknown; 1802 } else { 1803 DEFAULT(csiescseq.arg[0], 1); 1804 DEFAULT(csiescseq.arg[1], term.row); 1805 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1); 1806 tmoveato(0, 0); 1807 } 1808 break; 1809 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */ 1810 tcursor(CURSOR_SAVE); 1811 break; 1812 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */ 1813 if (csiescseq.priv) { 1814 goto unknown; 1815 } else { 1816 tcursor(CURSOR_LOAD); 1817 } 1818 break; 1819 case ' ': 1820 switch (csiescseq.mode[1]) { 1821 case 'q': /* DECSCUSR -- Set Cursor Style */ 1822 if (xsetcursor(csiescseq.arg[0])) 1823 goto unknown; 1824 break; 1825 default: 1826 goto unknown; 1827 } 1828 break; 1829 } 1830 } 1831 1832 void 1833 csidump(void) 1834 { 1835 size_t i; 1836 uint c; 1837 1838 fprintf(stderr, "ESC["); 1839 for (i = 0; i < csiescseq.len; i++) { 1840 c = csiescseq.buf[i] & 0xff; 1841 if (isprint(c)) { 1842 putc(c, stderr); 1843 } else if (c == '\n') { 1844 fprintf(stderr, "(\\n)"); 1845 } else if (c == '\r') { 1846 fprintf(stderr, "(\\r)"); 1847 } else if (c == 0x1b) { 1848 fprintf(stderr, "(\\e)"); 1849 } else { 1850 fprintf(stderr, "(%02x)", c); 1851 } 1852 } 1853 putc('\n', stderr); 1854 } 1855 1856 void 1857 csireset(void) 1858 { 1859 memset(&csiescseq, 0, sizeof(csiescseq)); 1860 } 1861 1862 void 1863 osc_color_response(int num, int index, int is_osc4) 1864 { 1865 int n; 1866 char buf[32]; 1867 unsigned char r, g, b; 1868 1869 if (xgetcolor(is_osc4 ? num : index, &r, &g, &b)) { 1870 fprintf(stderr, "erresc: failed to fetch %s color %d\n", 1871 is_osc4 ? "osc4" : "osc", 1872 is_osc4 ? num : index); 1873 return; 1874 } 1875 1876 n = snprintf(buf, sizeof buf, "\033]%s%d;rgb:%02x%02x/%02x%02x/%02x%02x\007", 1877 is_osc4 ? "4;" : "", num, r, r, g, g, b, b); 1878 if (n < 0 || n >= sizeof(buf)) { 1879 fprintf(stderr, "error: %s while printing %s response\n", 1880 n < 0 ? "snprintf failed" : "truncation occurred", 1881 is_osc4 ? "osc4" : "osc"); 1882 } else { 1883 ttywrite(buf, n, 1); 1884 } 1885 } 1886 1887 void 1888 strhandle(void) 1889 { 1890 char *p = NULL, *dec; 1891 int j, narg, par; 1892 const struct { int idx; char *str; } osc_table[] = { 1893 { defaultfg, "foreground" }, 1894 { defaultbg, "background" }, 1895 { defaultcs, "cursor" } 1896 }; 1897 1898 term.esc &= ~(ESC_STR_END|ESC_STR); 1899 strparse(); 1900 par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0; 1901 1902 switch (strescseq.type) { 1903 case ']': /* OSC -- Operating System Command */ 1904 switch (par) { 1905 case 0: 1906 if (narg > 1) { 1907 xsettitle(strescseq.args[1]); 1908 xseticontitle(strescseq.args[1]); 1909 } 1910 return; 1911 case 1: 1912 if (narg > 1) 1913 xseticontitle(strescseq.args[1]); 1914 return; 1915 case 2: 1916 if (narg > 1) 1917 xsettitle(strescseq.args[1]); 1918 return; 1919 case 52: /* manipulate selection data */ 1920 if (narg > 2 && allowwindowops) { 1921 dec = base64dec(strescseq.args[2]); 1922 if (dec) { 1923 xsetsel(dec); 1924 xclipcopy(); 1925 } else { 1926 fprintf(stderr, "erresc: invalid base64\n"); 1927 } 1928 } 1929 return; 1930 case 10: /* set dynamic VT100 text foreground color */ 1931 case 11: /* set dynamic VT100 text background color */ 1932 case 12: /* set dynamic text cursor color */ 1933 if (narg < 2) 1934 break; 1935 p = strescseq.args[1]; 1936 if ((j = par - 10) < 0 || j >= LEN(osc_table)) 1937 break; /* shouldn't be possible */ 1938 1939 if (!strcmp(p, "?")) { 1940 osc_color_response(par, osc_table[j].idx, 0); 1941 } else if (xsetcolorname(osc_table[j].idx, p)) { 1942 fprintf(stderr, "erresc: invalid %s color: %s\n", 1943 osc_table[j].str, p); 1944 } else { 1945 tfulldirt(); 1946 } 1947 return; 1948 case 4: /* color set */ 1949 if (narg < 3) 1950 break; 1951 p = strescseq.args[2]; 1952 /* FALLTHROUGH */ 1953 case 104: /* color reset */ 1954 j = (narg > 1) ? atoi(strescseq.args[1]) : -1; 1955 1956 if (p && !strcmp(p, "?")) { 1957 osc_color_response(j, 0, 1); 1958 } else if (xsetcolorname(j, p)) { 1959 if (par == 104 && narg <= 1) { 1960 xloadcols(); 1961 return; /* color reset without parameter */ 1962 } 1963 fprintf(stderr, "erresc: invalid color j=%d, p=%s\n", 1964 j, p ? p : "(null)"); 1965 } else { 1966 /* 1967 * TODO if defaultbg color is changed, borders 1968 * are dirty 1969 */ 1970 tfulldirt(); 1971 } 1972 return; 1973 case 110: /* reset dynamic VT100 text foreground color */ 1974 case 111: /* reset dynamic VT100 text background color */ 1975 case 112: /* reset dynamic text cursor color */ 1976 if (narg != 1) 1977 break; 1978 if ((j = par - 110) < 0 || j >= LEN(osc_table)) 1979 break; /* shouldn't be possible */ 1980 if (xsetcolorname(osc_table[j].idx, NULL)) { 1981 fprintf(stderr, "erresc: %s color not found\n", osc_table[j].str); 1982 } else { 1983 tfulldirt(); 1984 } 1985 return; 1986 } 1987 break; 1988 case 'k': /* old title set compatibility */ 1989 xsettitle(strescseq.args[0]); 1990 return; 1991 case 'P': /* DCS -- Device Control String */ 1992 case '_': /* APC -- Application Program Command */ 1993 case '^': /* PM -- Privacy Message */ 1994 return; 1995 } 1996 1997 fprintf(stderr, "erresc: unknown str "); 1998 strdump(); 1999 } 2000 2001 void 2002 strparse(void) 2003 { 2004 int c; 2005 char *p = strescseq.buf; 2006 2007 strescseq.narg = 0; 2008 strescseq.buf[strescseq.len] = '\0'; 2009 2010 if (*p == '\0') 2011 return; 2012 2013 while (strescseq.narg < STR_ARG_SIZ) { 2014 strescseq.args[strescseq.narg++] = p; 2015 while ((c = *p) != ';' && c != '\0') 2016 ++p; 2017 if (c == '\0') 2018 return; 2019 *p++ = '\0'; 2020 } 2021 } 2022 2023 void 2024 strdump(void) 2025 { 2026 size_t i; 2027 uint c; 2028 2029 fprintf(stderr, "ESC%c", strescseq.type); 2030 for (i = 0; i < strescseq.len; i++) { 2031 c = strescseq.buf[i] & 0xff; 2032 if (c == '\0') { 2033 putc('\n', stderr); 2034 return; 2035 } else if (isprint(c)) { 2036 putc(c, stderr); 2037 } else if (c == '\n') { 2038 fprintf(stderr, "(\\n)"); 2039 } else if (c == '\r') { 2040 fprintf(stderr, "(\\r)"); 2041 } else if (c == 0x1b) { 2042 fprintf(stderr, "(\\e)"); 2043 } else { 2044 fprintf(stderr, "(%02x)", c); 2045 } 2046 } 2047 fprintf(stderr, "ESC\\\n"); 2048 } 2049 2050 void 2051 strreset(void) 2052 { 2053 strescseq = (STREscape){ 2054 .buf = xrealloc(strescseq.buf, STR_BUF_SIZ), 2055 .siz = STR_BUF_SIZ, 2056 }; 2057 } 2058 2059 void 2060 sendbreak(const Arg *arg) 2061 { 2062 if (tcsendbreak(cmdfd, 0)) 2063 perror("Error sending break"); 2064 } 2065 2066 void 2067 tprinter(char *s, size_t len) 2068 { 2069 if (iofd != -1 && xwrite(iofd, s, len) < 0) { 2070 perror("Error writing to output file"); 2071 close(iofd); 2072 iofd = -1; 2073 } 2074 } 2075 2076 void 2077 iso14755(const Arg *arg) 2078 { 2079 FILE *p; 2080 char *us, *e, codepoint[9], uc[UTF_SIZ]; 2081 unsigned long utf32; 2082 2083 if (!(p = popen(iso14755_cmd, "r"))) 2084 return; 2085 2086 us = fgets(codepoint, sizeof(codepoint), p); 2087 pclose(p); 2088 2089 if (!us || *us == '\0' || *us == '-' || strlen(us) > 7) 2090 return; 2091 if ((utf32 = strtoul(us, &e, 16)) == ULONG_MAX || 2092 (*e != '\n' && *e != '\0')) 2093 return; 2094 2095 ttywrite(uc, utf8encode(utf32, uc), 1); 2096 } 2097 2098 void 2099 toggleprinter(const Arg *arg) 2100 { 2101 term.mode ^= MODE_PRINT; 2102 } 2103 2104 void 2105 printscreen(const Arg *arg) 2106 { 2107 tdump(); 2108 } 2109 2110 void 2111 printsel(const Arg *arg) 2112 { 2113 tdumpsel(); 2114 } 2115 2116 void 2117 tdumpsel(void) 2118 { 2119 char *ptr; 2120 2121 if ((ptr = getsel())) { 2122 tprinter(ptr, strlen(ptr)); 2123 free(ptr); 2124 } 2125 } 2126 2127 void 2128 tdumpline(int n) 2129 { 2130 char buf[UTF_SIZ]; 2131 const Glyph *bp, *end; 2132 2133 bp = &term.line[n][0]; 2134 end = &bp[MIN(tlinelen(n), term.col) - 1]; 2135 if (bp != end || bp->u != ' ') { 2136 for ( ; bp <= end; ++bp) 2137 tprinter(buf, utf8encode(bp->u, buf)); 2138 } 2139 tprinter("\n", 1); 2140 } 2141 2142 void 2143 tdump(void) 2144 { 2145 int i; 2146 2147 for (i = 0; i < term.row; ++i) 2148 tdumpline(i); 2149 } 2150 2151 void 2152 tputtab(int n) 2153 { 2154 uint x = term.c.x; 2155 2156 if (n > 0) { 2157 while (x < term.col && n--) 2158 for (++x; x < term.col && !term.tabs[x]; ++x) 2159 /* nothing */ ; 2160 } else if (n < 0) { 2161 while (x > 0 && n++) 2162 for (--x; x > 0 && !term.tabs[x]; --x) 2163 /* nothing */ ; 2164 } 2165 term.c.x = LIMIT(x, 0, term.col-1); 2166 } 2167 2168 void 2169 tdefutf8(char ascii) 2170 { 2171 if (ascii == 'G') 2172 term.mode |= MODE_UTF8; 2173 else if (ascii == '@') 2174 term.mode &= ~MODE_UTF8; 2175 } 2176 2177 void 2178 tdeftran(char ascii) 2179 { 2180 static char cs[] = "0B"; 2181 static int vcs[] = {CS_GRAPHIC0, CS_USA}; 2182 char *p; 2183 2184 if ((p = strchr(cs, ascii)) == NULL) { 2185 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii); 2186 } else { 2187 term.trantbl[term.icharset] = vcs[p - cs]; 2188 } 2189 } 2190 2191 void 2192 tdectest(char c) 2193 { 2194 int x, y; 2195 2196 if (c == '8') { /* DEC screen alignment test. */ 2197 for (x = 0; x < term.col; ++x) { 2198 for (y = 0; y < term.row; ++y) 2199 tsetchar('E', &term.c.attr, x, y); 2200 } 2201 } 2202 } 2203 2204 void 2205 tstrsequence(uchar c) 2206 { 2207 switch (c) { 2208 case 0x90: /* DCS -- Device Control String */ 2209 c = 'P'; 2210 break; 2211 case 0x9f: /* APC -- Application Program Command */ 2212 c = '_'; 2213 break; 2214 case 0x9e: /* PM -- Privacy Message */ 2215 c = '^'; 2216 break; 2217 case 0x9d: /* OSC -- Operating System Command */ 2218 c = ']'; 2219 break; 2220 } 2221 strreset(); 2222 strescseq.type = c; 2223 term.esc |= ESC_STR; 2224 } 2225 2226 void 2227 tcontrolcode(uchar ascii) 2228 { 2229 switch (ascii) { 2230 case '\t': /* HT */ 2231 tputtab(1); 2232 return; 2233 case '\b': /* BS */ 2234 tmoveto(term.c.x-1, term.c.y); 2235 return; 2236 case '\r': /* CR */ 2237 tmoveto(0, term.c.y); 2238 return; 2239 case '\f': /* LF */ 2240 case '\v': /* VT */ 2241 case '\n': /* LF */ 2242 /* go to first col if the mode is set */ 2243 tnewline(IS_SET(MODE_CRLF)); 2244 return; 2245 case '\a': /* BEL */ 2246 if (term.esc & ESC_STR_END) { 2247 /* backwards compatibility to xterm */ 2248 strhandle(); 2249 } else { 2250 xbell(); 2251 } 2252 break; 2253 case '\033': /* ESC */ 2254 csireset(); 2255 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST); 2256 term.esc |= ESC_START; 2257 return; 2258 case '\016': /* SO (LS1 -- Locking shift 1) */ 2259 case '\017': /* SI (LS0 -- Locking shift 0) */ 2260 term.charset = 1 - (ascii - '\016'); 2261 return; 2262 case '\032': /* SUB */ 2263 tsetchar('?', &term.c.attr, term.c.x, term.c.y); 2264 /* FALLTHROUGH */ 2265 case '\030': /* CAN */ 2266 csireset(); 2267 break; 2268 case '\005': /* ENQ (IGNORED) */ 2269 case '\000': /* NUL (IGNORED) */ 2270 case '\021': /* XON (IGNORED) */ 2271 case '\023': /* XOFF (IGNORED) */ 2272 case 0177: /* DEL (IGNORED) */ 2273 return; 2274 case 0x80: /* TODO: PAD */ 2275 case 0x81: /* TODO: HOP */ 2276 case 0x82: /* TODO: BPH */ 2277 case 0x83: /* TODO: NBH */ 2278 case 0x84: /* TODO: IND */ 2279 break; 2280 case 0x85: /* NEL -- Next line */ 2281 tnewline(1); /* always go to first col */ 2282 break; 2283 case 0x86: /* TODO: SSA */ 2284 case 0x87: /* TODO: ESA */ 2285 break; 2286 case 0x88: /* HTS -- Horizontal tab stop */ 2287 term.tabs[term.c.x] = 1; 2288 break; 2289 case 0x89: /* TODO: HTJ */ 2290 case 0x8a: /* TODO: VTS */ 2291 case 0x8b: /* TODO: PLD */ 2292 case 0x8c: /* TODO: PLU */ 2293 case 0x8d: /* TODO: RI */ 2294 case 0x8e: /* TODO: SS2 */ 2295 case 0x8f: /* TODO: SS3 */ 2296 case 0x91: /* TODO: PU1 */ 2297 case 0x92: /* TODO: PU2 */ 2298 case 0x93: /* TODO: STS */ 2299 case 0x94: /* TODO: CCH */ 2300 case 0x95: /* TODO: MW */ 2301 case 0x96: /* TODO: SPA */ 2302 case 0x97: /* TODO: EPA */ 2303 case 0x98: /* TODO: SOS */ 2304 case 0x99: /* TODO: SGCI */ 2305 break; 2306 case 0x9a: /* DECID -- Identify Terminal */ 2307 ttywrite(vtiden, strlen(vtiden), 0); 2308 break; 2309 case 0x9b: /* TODO: CSI */ 2310 case 0x9c: /* TODO: ST */ 2311 break; 2312 case 0x90: /* DCS -- Device Control String */ 2313 case 0x9d: /* OSC -- Operating System Command */ 2314 case 0x9e: /* PM -- Privacy Message */ 2315 case 0x9f: /* APC -- Application Program Command */ 2316 tstrsequence(ascii); 2317 return; 2318 } 2319 /* only CAN, SUB, \a and C1 chars interrupt a sequence */ 2320 term.esc &= ~(ESC_STR_END|ESC_STR); 2321 } 2322 2323 /* 2324 * returns 1 when the sequence is finished and it hasn't to read 2325 * more characters for this sequence, otherwise 0 2326 */ 2327 int 2328 eschandle(uchar ascii) 2329 { 2330 switch (ascii) { 2331 case '[': 2332 term.esc |= ESC_CSI; 2333 return 0; 2334 case '#': 2335 term.esc |= ESC_TEST; 2336 return 0; 2337 case '%': 2338 term.esc |= ESC_UTF8; 2339 return 0; 2340 case 'P': /* DCS -- Device Control String */ 2341 case '_': /* APC -- Application Program Command */ 2342 case '^': /* PM -- Privacy Message */ 2343 case ']': /* OSC -- Operating System Command */ 2344 case 'k': /* old title set compatibility */ 2345 tstrsequence(ascii); 2346 return 0; 2347 case 'n': /* LS2 -- Locking shift 2 */ 2348 case 'o': /* LS3 -- Locking shift 3 */ 2349 term.charset = 2 + (ascii - 'n'); 2350 break; 2351 case '(': /* GZD4 -- set primary charset G0 */ 2352 case ')': /* G1D4 -- set secondary charset G1 */ 2353 case '*': /* G2D4 -- set tertiary charset G2 */ 2354 case '+': /* G3D4 -- set quaternary charset G3 */ 2355 term.icharset = ascii - '('; 2356 term.esc |= ESC_ALTCHARSET; 2357 return 0; 2358 case 'D': /* IND -- Linefeed */ 2359 if (term.c.y == term.bot) { 2360 tscrollup(term.top, 1); 2361 } else { 2362 tmoveto(term.c.x, term.c.y+1); 2363 } 2364 break; 2365 case 'E': /* NEL -- Next line */ 2366 tnewline(1); /* always go to first col */ 2367 break; 2368 case 'H': /* HTS -- Horizontal tab stop */ 2369 term.tabs[term.c.x] = 1; 2370 break; 2371 case 'M': /* RI -- Reverse index */ 2372 if (term.c.y == term.top) { 2373 tscrolldown(term.top, 1); 2374 } else { 2375 tmoveto(term.c.x, term.c.y-1); 2376 } 2377 break; 2378 case 'Z': /* DECID -- Identify Terminal */ 2379 ttywrite(vtiden, strlen(vtiden), 0); 2380 break; 2381 case 'c': /* RIS -- Reset to initial state */ 2382 treset(); 2383 resettitle(); 2384 xloadcols(); 2385 xsetmode(0, MODE_HIDE); 2386 break; 2387 case '=': /* DECPAM -- Application keypad */ 2388 xsetmode(1, MODE_APPKEYPAD); 2389 break; 2390 case '>': /* DECPNM -- Normal keypad */ 2391 xsetmode(0, MODE_APPKEYPAD); 2392 break; 2393 case '7': /* DECSC -- Save Cursor */ 2394 tcursor(CURSOR_SAVE); 2395 break; 2396 case '8': /* DECRC -- Restore Cursor */ 2397 tcursor(CURSOR_LOAD); 2398 break; 2399 case '\\': /* ST -- String Terminator */ 2400 if (term.esc & ESC_STR_END) 2401 strhandle(); 2402 break; 2403 default: 2404 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", 2405 (uchar) ascii, isprint(ascii)? ascii:'.'); 2406 break; 2407 } 2408 return 1; 2409 } 2410 2411 void 2412 tputc(Rune u) 2413 { 2414 char c[UTF_SIZ]; 2415 int control; 2416 int width, len; 2417 Glyph *gp; 2418 2419 control = ISCONTROL(u); 2420 if (u < 127 || !IS_SET(MODE_UTF8)) { 2421 c[0] = u; 2422 width = len = 1; 2423 } else { 2424 len = utf8encode(u, c); 2425 if (!control && (width = wcwidth(u)) == -1) 2426 width = 1; 2427 } 2428 2429 if (IS_SET(MODE_PRINT)) 2430 tprinter(c, len); 2431 2432 /* 2433 * STR sequence must be checked before anything else 2434 * because it uses all following characters until it 2435 * receives a ESC, a SUB, a ST or any other C1 control 2436 * character. 2437 */ 2438 if (term.esc & ESC_STR) { 2439 if (u == '\a' || u == 030 || u == 032 || u == 033 || 2440 ISCONTROLC1(u)) { 2441 term.esc &= ~(ESC_START|ESC_STR); 2442 term.esc |= ESC_STR_END; 2443 goto check_control_code; 2444 } 2445 2446 if (strescseq.len+len >= strescseq.siz) { 2447 /* 2448 * Here is a bug in terminals. If the user never sends 2449 * some code to stop the str or esc command, then st 2450 * will stop responding. But this is better than 2451 * silently failing with unknown characters. At least 2452 * then users will report back. 2453 * 2454 * In the case users ever get fixed, here is the code: 2455 */ 2456 /* 2457 * term.esc = 0; 2458 * strhandle(); 2459 */ 2460 if (strescseq.siz > (SIZE_MAX - UTF_SIZ) / 2) 2461 return; 2462 strescseq.siz *= 2; 2463 strescseq.buf = xrealloc(strescseq.buf, strescseq.siz); 2464 } 2465 2466 memmove(&strescseq.buf[strescseq.len], c, len); 2467 strescseq.len += len; 2468 return; 2469 } 2470 2471 check_control_code: 2472 /* 2473 * Actions of control codes must be performed as soon they arrive 2474 * because they can be embedded inside a control sequence, and 2475 * they must not cause conflicts with sequences. 2476 */ 2477 if (control) { 2478 /* in UTF-8 mode ignore handling C1 control characters */ 2479 if (IS_SET(MODE_UTF8) && ISCONTROLC1(u)) 2480 return; 2481 tcontrolcode(u); 2482 /* 2483 * control codes are not shown ever 2484 */ 2485 if (!term.esc) 2486 term.lastc = 0; 2487 return; 2488 } else if (term.esc & ESC_START) { 2489 if (term.esc & ESC_CSI) { 2490 csiescseq.buf[csiescseq.len++] = u; 2491 if (BETWEEN(u, 0x40, 0x7E) 2492 || csiescseq.len >= \ 2493 sizeof(csiescseq.buf)-1) { 2494 term.esc = 0; 2495 csiparse(); 2496 csihandle(); 2497 } 2498 return; 2499 } else if (term.esc & ESC_UTF8) { 2500 tdefutf8(u); 2501 } else if (term.esc & ESC_ALTCHARSET) { 2502 tdeftran(u); 2503 } else if (term.esc & ESC_TEST) { 2504 tdectest(u); 2505 } else { 2506 if (!eschandle(u)) 2507 return; 2508 /* sequence already finished */ 2509 } 2510 term.esc = 0; 2511 /* 2512 * All characters which form part of a sequence are not 2513 * printed 2514 */ 2515 return; 2516 } 2517 if (selected(term.c.x, term.c.y)) 2518 selclear(); 2519 2520 gp = &term.line[term.c.y][term.c.x]; 2521 if (IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) { 2522 gp->mode |= ATTR_WRAP; 2523 tnewline(1); 2524 gp = &term.line[term.c.y][term.c.x]; 2525 } 2526 2527 if (IS_SET(MODE_INSERT) && term.c.x+width < term.col) { 2528 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph)); 2529 gp->mode &= ~ATTR_WIDE; 2530 } 2531 2532 if (term.c.x+width > term.col) { 2533 if (IS_SET(MODE_WRAP)) 2534 tnewline(1); 2535 else 2536 tmoveto(term.col - width, term.c.y); 2537 gp = &term.line[term.c.y][term.c.x]; 2538 } 2539 2540 tsetchar(u, &term.c.attr, term.c.x, term.c.y); 2541 term.lastc = u; 2542 2543 if (width == 2) { 2544 gp->mode |= ATTR_WIDE; 2545 if (term.c.x+1 < term.col) { 2546 if (gp[1].mode == ATTR_WIDE && term.c.x+2 < term.col) { 2547 gp[2].u = ' '; 2548 gp[2].mode &= ~ATTR_WDUMMY; 2549 } 2550 gp[1].u = '\0'; 2551 gp[1].mode = ATTR_WDUMMY; 2552 } 2553 } 2554 if (term.c.x+width < term.col) { 2555 tmoveto(term.c.x+width, term.c.y); 2556 } else { 2557 term.c.state |= CURSOR_WRAPNEXT; 2558 } 2559 } 2560 2561 int 2562 twrite(const char *buf, int buflen, int show_ctrl) 2563 { 2564 int charsize; 2565 Rune u; 2566 int n; 2567 2568 for (n = 0; n < buflen; n += charsize) { 2569 if (IS_SET(MODE_UTF8)) { 2570 /* process a complete utf8 char */ 2571 charsize = utf8decode(buf + n, &u, buflen - n); 2572 if (charsize == 0) 2573 break; 2574 } else { 2575 u = buf[n] & 0xFF; 2576 charsize = 1; 2577 } 2578 if (show_ctrl && ISCONTROL(u)) { 2579 if (u & 0x80) { 2580 u &= 0x7f; 2581 tputc('^'); 2582 tputc('['); 2583 } else if (u != '\n' && u != '\r' && u != '\t') { 2584 u ^= 0x40; 2585 tputc('^'); 2586 } 2587 } 2588 tputc(u); 2589 } 2590 return n; 2591 } 2592 2593 void 2594 tresize(int col, int row) 2595 { 2596 int i; 2597 int minrow = MIN(row, term.row); 2598 int mincol = MIN(col, term.col); 2599 int *bp; 2600 TCursor c; 2601 2602 if (col < 1 || row < 1) { 2603 fprintf(stderr, 2604 "tresize: error resizing to %dx%d\n", col, row); 2605 return; 2606 } 2607 2608 /* 2609 * slide screen to keep cursor where we expect it - 2610 * tscrollup would work here, but we can optimize to 2611 * memmove because we're freeing the earlier lines 2612 */ 2613 for (i = 0; i <= term.c.y - row; i++) { 2614 free(term.line[i]); 2615 free(term.alt[i]); 2616 } 2617 /* ensure that both src and dst are not NULL */ 2618 if (i > 0) { 2619 memmove(term.line, term.line + i, row * sizeof(Line)); 2620 memmove(term.alt, term.alt + i, row * sizeof(Line)); 2621 } 2622 for (i += row; i < term.row; i++) { 2623 free(term.line[i]); 2624 free(term.alt[i]); 2625 } 2626 2627 /* resize to new height */ 2628 term.line = xrealloc(term.line, row * sizeof(Line)); 2629 term.alt = xrealloc(term.alt, row * sizeof(Line)); 2630 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty)); 2631 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs)); 2632 2633 /* resize each row to new width, zero-pad if needed */ 2634 for (i = 0; i < minrow; i++) { 2635 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph)); 2636 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph)); 2637 } 2638 2639 /* allocate any new rows */ 2640 for (/* i = minrow */; i < row; i++) { 2641 term.line[i] = xmalloc(col * sizeof(Glyph)); 2642 term.alt[i] = xmalloc(col * sizeof(Glyph)); 2643 } 2644 if (col > term.col) { 2645 bp = term.tabs + term.col; 2646 2647 memset(bp, 0, sizeof(*term.tabs) * (col - term.col)); 2648 while (--bp > term.tabs && !*bp) 2649 /* nothing */ ; 2650 for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces) 2651 *bp = 1; 2652 } 2653 /* update terminal size */ 2654 term.col = col; 2655 term.row = row; 2656 /* reset scrolling region */ 2657 tsetscroll(0, row-1); 2658 /* make use of the LIMIT in tmoveto */ 2659 tmoveto(term.c.x, term.c.y); 2660 /* Clearing both screens (it makes dirty all lines) */ 2661 c = term.c; 2662 for (i = 0; i < 2; i++) { 2663 if (mincol < col && 0 < minrow) { 2664 tclearregion(mincol, 0, col - 1, minrow - 1); 2665 } 2666 if (0 < col && minrow < row) { 2667 tclearregion(0, minrow, col - 1, row - 1); 2668 } 2669 tswapscreen(); 2670 tcursor(CURSOR_LOAD); 2671 } 2672 term.c = c; 2673 } 2674 2675 void 2676 resettitle(void) 2677 { 2678 xsettitle(NULL); 2679 } 2680 2681 void 2682 drawregion(int x1, int y1, int x2, int y2) 2683 { 2684 int y; 2685 2686 for (y = y1; y < y2; y++) { 2687 if (!term.dirty[y]) 2688 continue; 2689 2690 term.dirty[y] = 0; 2691 xdrawline(term.line[y], x1, y, x2); 2692 } 2693 } 2694 2695 void 2696 draw(void) 2697 { 2698 int cx = term.c.x, ocx = term.ocx, ocy = term.ocy; 2699 2700 if (!xstartdraw()) 2701 return; 2702 2703 /* adjust cursor position */ 2704 LIMIT(term.ocx, 0, term.col-1); 2705 LIMIT(term.ocy, 0, term.row-1); 2706 if (term.line[term.ocy][term.ocx].mode & ATTR_WDUMMY) 2707 term.ocx--; 2708 if (term.line[term.c.y][cx].mode & ATTR_WDUMMY) 2709 cx--; 2710 2711 drawregion(0, 0, term.col, term.row); 2712 xdrawcursor(cx, term.c.y, term.line[term.c.y][cx], 2713 term.ocx, term.ocy, term.line[term.ocy][term.ocx]); 2714 term.ocx = cx; 2715 term.ocy = term.c.y; 2716 xfinishdraw(); 2717 if (ocx != term.ocx || ocy != term.ocy) 2718 xximspot(term.ocx, term.ocy); 2719 } 2720 2721 void 2722 redraw(void) 2723 { 2724 tfulldirt(); 2725 draw(); 2726 }