1 /*- 2 * Copyright (c) 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 1993, 1994, 1995, 1996 5 * Keith Bostic. All rights reserved. 6 * 7 * See the LICENSE file for redistribution information. 8 */ 9 10 #include "config.h" 11 12 #ifndef lint 13 static const char sccsid[] = "$Id: cl_funcs.c,v 10.74 2012/10/11 10:30:16 zy Exp $"; 14 #endif /* not lint */ 15 16 #include <sys/types.h> 17 #include <sys/queue.h> 18 #include <sys/time.h> 19 20 #include <bitstring.h> 21 #include <ctype.h> 22 #include <signal.h> 23 #include <stdio.h> 24 #include <stdlib.h> 25 #include <string.h> 26 #ifdef HAVE_TERM_H 27 #include <term.h> 28 #endif 29 #include <termios.h> 30 #include <unistd.h> 31 32 #include "../common/common.h" 33 #include "../vi/vi.h" 34 #include "cl.h" 35 36 static void cl_rdiv __P((SCR *)); 37 38 static int 39 addstr4(SCR *sp, void *str, size_t len, int wide) 40 { 41 CL_PRIVATE *clp; 42 WINDOW *win; 43 size_t y, x; 44 int iv; 45 46 clp = CLP(sp); 47 win = CLSP(sp) ? CLSP(sp) : stdscr; 48 49 /* 50 * If ex isn't in control, it's the last line of the screen and 51 * it's a split screen, use inverse video. 52 */ 53 iv = 0; 54 getyx(win, y, x); 55 if (!F_ISSET(sp, SC_SCR_EXWROTE) && 56 y == RLNO(sp, LASTLINE(sp)) && IS_SPLIT(sp)) { 57 iv = 1; 58 (void)wstandout(win); 59 } 60 61 #ifdef USE_WIDECHAR 62 if (wide) { 63 if (waddnwstr(win, str, len) == ERR) 64 return (1); 65 } else 66 #endif 67 if (waddnstr(win, str, len) == ERR) 68 return (1); 69 70 if (iv) 71 (void)wstandend(win); 72 return (0); 73 } 74 75 /* 76 * cl_waddstr -- 77 * Add len bytes from the string at the cursor, advancing the cursor. 78 * 79 * PUBLIC: int cl_waddstr __P((SCR *, const CHAR_T *, size_t)); 80 */ 81 int 82 cl_waddstr(SCR *sp, const CHAR_T *str, size_t len) 83 { 84 return addstr4(sp, (void *)str, len, 1); 85 } 86 87 /* 88 * cl_addstr -- 89 * Add len bytes from the string at the cursor, advancing the cursor. 90 * 91 * PUBLIC: int cl_addstr __P((SCR *, const char *, size_t)); 92 */ 93 int 94 cl_addstr(SCR *sp, const char *str, size_t len) 95 { 96 return addstr4(sp, (void *)str, len, 0); 97 } 98 99 /* 100 * cl_attr -- 101 * Toggle a screen attribute on/off. 102 * 103 * PUBLIC: int cl_attr __P((SCR *, scr_attr_t, int)); 104 */ 105 int 106 cl_attr(SCR *sp, scr_attr_t attribute, int on) 107 { 108 CL_PRIVATE *clp; 109 WINDOW *win; 110 111 clp = CLP(sp); 112 win = CLSP(sp) ? CLSP(sp) : stdscr; 113 114 switch (attribute) { 115 case SA_ALTERNATE: 116 /* 117 * !!! 118 * There's a major layering violation here. The problem is that the 119 * X11 xterm screen has what's known as an "alternate" screen. Some 120 * xterm termcap/terminfo entries include sequences to switch to/from 121 * that alternate screen as part of the ti/te (smcup/rmcup) strings. 122 * Vi runs in the alternate screen, so that you are returned to the 123 * same screen contents on exit from vi that you had when you entered 124 * vi. Further, when you run :shell, or :!date or similar ex commands, 125 * you also see the original screen contents. This wasn't deliberate 126 * on vi's part, it's just that it historically sent terminal init/end 127 * sequences at those times, and the addition of the alternate screen 128 * sequences to the strings changed the behavior of vi. The problem 129 * caused by this is that we don't want to switch back to the alternate 130 * screen while getting a new command from the user, when the user is 131 * continuing to enter ex commands, e.g.: 132 * 133 * :!date <<< switch to original screen 134 * [Hit return to continue] <<< prompt user to continue 135 * :command <<< get command from user 136 * 137 * Note that the :command input is a true vi input mode, e.g., input 138 * maps and abbreviations are being done. So, we need to be able to 139 * switch back into the vi screen mode, without flashing the screen. 140 * 141 * To make matters worse, the curses initscr() and endwin() calls will 142 * do this automatically -- so, this attribute isn't as controlled by 143 * the higher level screen as closely as one might like. 144 */ 145 if (on) { 146 if (clp->ti_te != TI_SENT) { 147 clp->ti_te = TI_SENT; 148 if (clp->smcup == NULL) 149 (void)cl_getcap(sp, "smcup", &clp->smcup); 150 if (clp->smcup != NULL) 151 (void)tputs(clp->smcup, 1, cl_putchar); 152 } 153 } else 154 if (clp->ti_te != TE_SENT) { 155 clp->ti_te = TE_SENT; 156 if (clp->rmcup == NULL) 157 (void)cl_getcap(sp, "rmcup", &clp->rmcup); 158 if (clp->rmcup != NULL) 159 (void)tputs(clp->rmcup, 1, cl_putchar); 160 (void)fflush(stdout); 161 } 162 (void)fflush(stdout); 163 break; 164 case SA_INVERSE: 165 if (F_ISSET(sp, SC_EX | SC_SCR_EXWROTE)) { 166 if (clp->smso == NULL) 167 return (1); 168 if (on) 169 (void)tputs(clp->smso, 1, cl_putchar); 170 else 171 (void)tputs(clp->rmso, 1, cl_putchar); 172 (void)fflush(stdout); 173 } else { 174 if (on) 175 (void)wstandout(win); 176 else 177 (void)wstandend(win); 178 } 179 break; 180 default: 181 abort(); 182 } 183 return (0); 184 } 185 186 /* 187 * cl_baud -- 188 * Return the baud rate. 189 * 190 * PUBLIC: int cl_baud __P((SCR *, u_long *)); 191 */ 192 int 193 cl_baud(SCR *sp, u_long *ratep) 194 { 195 CL_PRIVATE *clp; 196 197 /* 198 * XXX 199 * There's no portable way to get a "baud rate" -- cfgetospeed(3) 200 * returns the value associated with some #define, which we may 201 * never have heard of, or which may be a purely local speed. Vi 202 * only cares if it's SLOW (w300), slow (w1200) or fast (w9600). 203 * Try and detect the slow ones, and default to fast. 204 */ 205 clp = CLP(sp); 206 switch (cfgetospeed(&clp->orig)) { 207 case B50: 208 case B75: 209 case B110: 210 case B134: 211 case B150: 212 case B200: 213 case B300: 214 case B600: 215 *ratep = 600; 216 break; 217 case B1200: 218 *ratep = 1200; 219 break; 220 default: 221 *ratep = 9600; 222 break; 223 } 224 return (0); 225 } 226 227 /* 228 * cl_bell -- 229 * Ring the bell/flash the screen. 230 * 231 * PUBLIC: int cl_bell __P((SCR *)); 232 */ 233 int 234 cl_bell(SCR *sp) 235 { 236 if (F_ISSET(sp, SC_EX | SC_SCR_EXWROTE | SC_SCR_EX)) 237 (void)write(STDOUT_FILENO, "\07", 1); /* \a */ 238 else { 239 /* 240 * Vi has an edit option which determines if the terminal 241 * should be beeped or the screen flashed. 242 */ 243 if (O_ISSET(sp, O_FLASH)) 244 (void)flash(); 245 else 246 (void)beep(); 247 } 248 return (0); 249 } 250 251 /* 252 * cl_clrtoeol -- 253 * Clear from the current cursor to the end of the line. 254 * 255 * PUBLIC: int cl_clrtoeol __P((SCR *)); 256 */ 257 int 258 cl_clrtoeol(SCR *sp) 259 { 260 WINDOW *win; 261 #if 0 262 size_t spcnt, y, x; 263 #endif 264 265 win = CLSP(sp) ? CLSP(sp) : stdscr; 266 267 #if 0 268 if (IS_VSPLIT(sp)) { 269 /* The cursor must be returned to its original position. */ 270 getyx(win, y, x); 271 for (spcnt = (sp->coff + sp->cols) - x; spcnt > 0; --spcnt) 272 (void)waddch(win, ' '); 273 (void)wmove(win, y, x); 274 return (0); 275 } else 276 #endif 277 return (wclrtoeol(win) == ERR); 278 } 279 280 /* 281 * cl_cursor -- 282 * Return the current cursor position. 283 * 284 * PUBLIC: int cl_cursor __P((SCR *, size_t *, size_t *)); 285 */ 286 int 287 cl_cursor(SCR *sp, size_t *yp, size_t *xp) 288 { 289 WINDOW *win; 290 win = CLSP(sp) ? CLSP(sp) : stdscr; 291 /* 292 * The curses screen support splits a single underlying curses screen 293 * into multiple screens to support split screen semantics. For this 294 * reason the returned value must be adjusted to be relative to the 295 * current screen, and not absolute. Screens that implement the split 296 * using physically distinct screens won't need this hack. 297 */ 298 getyx(win, *yp, *xp); 299 /* 300 *yp -= sp->roff; 301 *xp -= sp->coff; 302 */ 303 return (0); 304 } 305 306 /* 307 * cl_deleteln -- 308 * Delete the current line, scrolling all lines below it. 309 * 310 * PUBLIC: int cl_deleteln __P((SCR *)); 311 */ 312 int 313 cl_deleteln(SCR *sp) 314 { 315 CL_PRIVATE *clp; 316 WINDOW *win; 317 size_t y, x; 318 319 clp = CLP(sp); 320 win = CLSP(sp) ? CLSP(sp) : stdscr; 321 322 /* 323 * This clause is required because the curses screen uses reverse 324 * video to delimit split screens. If the screen does not do this, 325 * this code won't be necessary. 326 * 327 * If the bottom line was in reverse video, rewrite it in normal 328 * video before it's scrolled. 329 */ 330 if (!F_ISSET(sp, SC_SCR_EXWROTE) && IS_SPLIT(sp)) { 331 getyx(win, y, x); 332 mvwchgat(win, RLNO(sp, LASTLINE(sp)), 0, -1, A_NORMAL, 0, NULL); 333 (void)wmove(win, y, x); 334 } 335 336 /* 337 * The bottom line is expected to be blank after this operation, 338 * and other screens must support that semantic. 339 */ 340 return (wdeleteln(win) == ERR); 341 } 342 343 /* 344 * cl_discard -- 345 * Discard a screen. 346 * 347 * PUBLIC: int cl_discard __P((SCR *, SCR **)); 348 */ 349 int 350 cl_discard(SCR *discardp, SCR **acquirep) 351 { 352 CL_PRIVATE *clp; 353 SCR* tsp; 354 355 if (discardp) { 356 clp = CLP(discardp); 357 F_SET(clp, CL_LAYOUT); 358 359 if (CLSP(discardp)) { 360 delwin(CLSP(discardp)); 361 discardp->cl_private = NULL; 362 } 363 } 364 365 /* no screens got a piece; we're done */ 366 if (!acquirep) 367 return 0; 368 369 for (; (tsp = *acquirep) != NULL; ++acquirep) { 370 clp = CLP(tsp); 371 F_SET(clp, CL_LAYOUT); 372 373 if (CLSP(tsp)) 374 delwin(CLSP(tsp)); 375 tsp->cl_private = subwin(stdscr, tsp->rows, tsp->cols, 376 tsp->roff, tsp->coff); 377 } 378 379 /* discardp is going away, acquirep is taking up its space. */ 380 return (0); 381 } 382 383 /* 384 * cl_ex_adjust -- 385 * Adjust the screen for ex. This routine is purely for standalone 386 * ex programs. All special purpose, all special case. 387 * 388 * PUBLIC: int cl_ex_adjust __P((SCR *, exadj_t)); 389 */ 390 int 391 cl_ex_adjust(SCR *sp, exadj_t action) 392 { 393 CL_PRIVATE *clp; 394 int cnt; 395 396 clp = CLP(sp); 397 switch (action) { 398 case EX_TERM_SCROLL: 399 /* Move the cursor up one line if that's possible. */ 400 if (clp->cuu1 != NULL) 401 (void)tputs(clp->cuu1, 1, cl_putchar); 402 else if (clp->cup != NULL) 403 (void)tputs(tgoto(clp->cup, 404 0, LINES - 2), 1, cl_putchar); 405 else 406 return (0); 407 /* FALLTHROUGH */ 408 case EX_TERM_CE: 409 /* Clear the line. */ 410 if (clp->el != NULL) { 411 (void)putchar('\r'); 412 (void)tputs(clp->el, 1, cl_putchar); 413 } else { 414 /* 415 * Historically, ex didn't erase the line, so, if the 416 * displayed line was only a single glyph, and <eof> 417 * was more than one glyph, the output would not fully 418 * overwrite the user's input. To fix this, output 419 * the maxiumum character number of spaces. Note, 420 * this won't help if the user entered extra prompt 421 * or <blank> characters before the command character. 422 * We'd have to do a lot of work to make that work, and 423 * it's almost certainly not worth the effort. 424 */ 425 for (cnt = 0; cnt < MAX_CHARACTER_COLUMNS; ++cnt) 426 (void)putchar('\b'); 427 for (cnt = 0; cnt < MAX_CHARACTER_COLUMNS; ++cnt) 428 (void)putchar(' '); 429 (void)putchar('\r'); 430 (void)fflush(stdout); 431 } 432 break; 433 default: 434 abort(); 435 } 436 return (0); 437 } 438 439 /* 440 * cl_insertln -- 441 * Push down the current line, discarding the bottom line. 442 * 443 * PUBLIC: int cl_insertln __P((SCR *)); 444 */ 445 int 446 cl_insertln(SCR *sp) 447 { 448 WINDOW *win; 449 win = CLSP(sp) ? CLSP(sp) : stdscr; 450 /* 451 * The current line is expected to be blank after this operation, 452 * and the screen must support that semantic. 453 */ 454 return (winsertln(win) == ERR); 455 } 456 457 /* 458 * cl_keyval -- 459 * Return the value for a special key. 460 * 461 * PUBLIC: int cl_keyval __P((SCR *, scr_keyval_t, CHAR_T *, int *)); 462 */ 463 int 464 cl_keyval(SCR *sp, scr_keyval_t val, CHAR_T *chp, int *dnep) 465 { 466 CL_PRIVATE *clp; 467 468 /* 469 * VEOF, VERASE and VKILL are required by POSIX 1003.1-1990, 470 * VWERASE is a 4BSD extension. 471 */ 472 clp = CLP(sp); 473 switch (val) { 474 case KEY_VEOF: 475 *dnep = (*chp = clp->orig.c_cc[VEOF]) == _POSIX_VDISABLE; 476 break; 477 case KEY_VERASE: 478 *dnep = (*chp = clp->orig.c_cc[VERASE]) == _POSIX_VDISABLE; 479 break; 480 case KEY_VKILL: 481 *dnep = (*chp = clp->orig.c_cc[VKILL]) == _POSIX_VDISABLE; 482 break; 483 #ifdef VWERASE 484 case KEY_VWERASE: 485 *dnep = (*chp = clp->orig.c_cc[VWERASE]) == _POSIX_VDISABLE; 486 break; 487 #endif 488 default: 489 *dnep = 1; 490 break; 491 } 492 return (0); 493 } 494 495 /* 496 * cl_move -- 497 * Move the cursor. 498 * 499 * PUBLIC: int cl_move __P((SCR *, size_t, size_t)); 500 */ 501 int 502 cl_move(SCR *sp, size_t lno, size_t cno) 503 { 504 WINDOW *win; 505 win = CLSP(sp) ? CLSP(sp) : stdscr; 506 /* See the comment in cl_cursor. */ 507 if (wmove(win, RLNO(sp, lno), RCNO(sp, cno)) == ERR) { 508 msgq(sp, M_ERR, "Error: move: l(%zu + %zu) c(%zu + %zu)", 509 lno, sp->roff, cno, sp->coff); 510 return (1); 511 } 512 return (0); 513 } 514 515 /* 516 * cl_refresh -- 517 * Refresh the screen. 518 * 519 * PUBLIC: int cl_refresh __P((SCR *, int)); 520 */ 521 int 522 cl_refresh(SCR *sp, int repaint) 523 { 524 GS *gp; 525 CL_PRIVATE *clp; 526 WINDOW *win; 527 SCR *psp, *tsp; 528 size_t y, x; 529 530 gp = sp->gp; 531 clp = CLP(sp); 532 win = CLSP(sp) ? CLSP(sp) : stdscr; 533 534 /* 535 * If we received a killer signal, we're done, there's no point 536 * in refreshing the screen. 537 */ 538 if (clp->killersig) 539 return (0); 540 541 /* 542 * If repaint is set, the editor is telling us that we don't know 543 * what's on the screen, so we have to repaint from scratch. 544 * 545 * If repaint set or the screen layout changed, we need to redraw 546 * any lines separating vertically split screens. If the horizontal 547 * offsets are the same, then the split was vertical, and need to 548 * draw a dividing line. 549 */ 550 if (repaint || F_ISSET(clp, CL_LAYOUT)) { 551 getyx(stdscr, y, x); 552 for (psp = sp; psp != NULL; psp = TAILQ_NEXT(psp, q)) 553 for (tsp = TAILQ_NEXT(psp, q); tsp != NULL; 554 tsp = TAILQ_NEXT(tsp, q)) 555 if (psp->roff == tsp->roff) { 556 if (psp->coff + psp->cols + 1 == tsp->coff) 557 cl_rdiv(psp); 558 else 559 if (tsp->coff + tsp->cols + 1 == psp->coff) 560 cl_rdiv(tsp); 561 } 562 (void)wmove(stdscr, y, x); 563 F_CLR(clp, CL_LAYOUT); 564 } 565 566 /* 567 * In the curses library, doing wrefresh(curscr) is okay, but the 568 * screen flashes when we then apply the refresh() to bring it up 569 * to date. So, use clearok(). 570 */ 571 if (repaint) 572 clearok(curscr, 1); 573 /* 574 * Only do an actual refresh, when this is the focus window, 575 * i.e. the one holding the cursor. This assumes that refresh 576 * is called for that window after refreshing the others. 577 * This prevents the cursor being drawn in the other windows. 578 */ 579 return (wnoutrefresh(stdscr) == ERR || 580 wnoutrefresh(win) == ERR || 581 (sp == clp->focus && doupdate() == ERR)); 582 } 583 584 /* 585 * cl_rdiv -- 586 * Draw a dividing line between two vertically split screens. 587 */ 588 static void 589 cl_rdiv(SCR *sp) 590 { 591 #ifdef __NetBSD__ 592 mvvline(sp->roff, sp->cols + sp->coff, '|', sp->rows); 593 #else 594 mvvline(sp->roff, sp->cols + sp->coff, ACS_VLINE, sp->rows); 595 #endif 596 } 597 598 /* 599 * cl_rename -- 600 * Rename the file. 601 * 602 * PUBLIC: int cl_rename __P((SCR *, char *, int)); 603 */ 604 int 605 cl_rename(SCR *sp, char *name, int on) 606 { 607 GS *gp; 608 CL_PRIVATE *clp; 609 FILE *pfp; 610 char buf[256], *s, *e; 611 char * wid; 612 char cmd[64]; 613 614 gp = sp->gp; 615 clp = CLP(sp); 616 617 /* 618 * XXX 619 * We can only rename windows for xterm. 620 */ 621 if (on) { 622 clp->focus = sp; 623 if (!F_ISSET(clp, CL_RENAME_OK) || 624 strncmp(OG_STR(gp, GO_TERM), "xterm", 5)) 625 return (0); 626 627 if (clp->oname == NULL && (wid = getenv("WINDOWID"))) { 628 snprintf(cmd, sizeof(cmd), "xprop -id %s WM_NAME", wid); 629 if ((pfp = popen(cmd, "r")) == NULL) 630 goto rename; 631 if (fgets(buf, sizeof(buf), pfp) == NULL) { 632 pclose(pfp); 633 goto rename; 634 } 635 pclose(pfp); 636 if ((s = strchr(buf, '"')) != NULL && 637 (e = strrchr(buf, '"')) != NULL) 638 clp->oname = strndup(s + 1, e - s - 1); 639 } 640 641 rename: cl_setname(gp, name); 642 643 F_SET(clp, CL_RENAME); 644 } else 645 if (F_ISSET(clp, CL_RENAME)) { 646 cl_setname(gp, clp->oname); 647 648 F_CLR(clp, CL_RENAME); 649 } 650 return (0); 651 } 652 653 /* 654 * cl_setname -- 655 * Set a X11 icon/window name. 656 * 657 * PUBLIC: void cl_setname __P((GS *, char *)); 658 */ 659 void 660 cl_setname(GS *gp, char *name) 661 { 662 /* X11 xterm escape sequence to rename the icon/window. */ 663 #define XTERM_RENAME "\033]0;%s\007" 664 665 (void)printf(XTERM_RENAME, name == NULL ? OG_STR(gp, GO_TERM) : name); 666 (void)fflush(stdout); 667 #undef XTERM_RENAME 668 } 669 670 /* 671 * cl_split -- 672 * Split a screen. 673 * 674 * PUBLIC: int cl_split __P((SCR *, SCR *)); 675 */ 676 int 677 cl_split(SCR *origp, SCR *newp) 678 { 679 CL_PRIVATE *clp; 680 681 clp = CLP(origp); 682 F_SET(clp, CL_LAYOUT); 683 684 if (CLSP(origp)) 685 delwin(CLSP(origp)); 686 687 origp->cl_private = subwin(stdscr, origp->rows, origp->cols, 688 origp->roff, origp->coff); 689 newp->cl_private = subwin(stdscr, newp->rows, newp->cols, 690 newp->roff, newp->coff); 691 692 /* origp is the original screen, giving up space to newp. */ 693 return (0); 694 } 695 696 /* 697 * cl_suspend -- 698 * Suspend a screen. 699 * 700 * PUBLIC: int cl_suspend __P((SCR *, int *)); 701 */ 702 int 703 cl_suspend(SCR *sp, int *allowedp) 704 { 705 struct termios t; 706 CL_PRIVATE *clp; 707 WINDOW *win; 708 GS *gp; 709 size_t y, x; 710 int changed; 711 712 gp = sp->gp; 713 clp = CLP(sp); 714 win = CLSP(sp) ? CLSP(sp) : stdscr; 715 *allowedp = 1; 716 717 /* 718 * The ex implementation of this function isn't needed by screens not 719 * supporting ex commands that require full terminal canonical mode 720 * (e.g. :suspend). 721 * 722 * The vi implementation of this function isn't needed by screens not 723 * supporting vi process suspension, i.e. any screen that isn't backed 724 * by a UNIX shell. 725 * 726 * Setting allowedp to 0 will cause the editor to reject the command. 727 */ 728 if (F_ISSET(sp, SC_EX)) { 729 /* Save the terminal settings, and restore the original ones. */ 730 if (F_ISSET(clp, CL_STDIN_TTY)) { 731 (void)tcgetattr(STDIN_FILENO, &t); 732 (void)tcsetattr(STDIN_FILENO, 733 TCSASOFT | TCSADRAIN, &clp->orig); 734 } 735 736 /* Stop the process group. */ 737 (void)kill(0, SIGTSTP); 738 739 /* Time passes ... */ 740 741 /* Restore terminal settings. */ 742 if (F_ISSET(clp, CL_STDIN_TTY)) 743 (void)tcsetattr(STDIN_FILENO, TCSASOFT | TCSADRAIN, &t); 744 return (0); 745 } 746 747 /* 748 * Move to the lower left-hand corner of the screen. 749 * 750 * XXX 751 * Not sure this is necessary in System V implementations, but it 752 * shouldn't hurt. 753 */ 754 getyx(win, y, x); 755 (void)wmove(win, LINES - 1, 0); 756 (void)wrefresh(win); 757 758 /* 759 * Temporarily end the screen. System V introduced a semantic where 760 * endwin() could be restarted. We use it because restarting curses 761 * from scratch often fails in System V. 4BSD curses didn't support 762 * restarting after endwin(), so we have to do what clean up we can 763 * without calling it. 764 */ 765 /* Save the terminal settings. */ 766 (void)tcgetattr(STDIN_FILENO, &t); 767 768 /* Restore the cursor keys to normal mode. */ 769 (void)keypad(stdscr, FALSE); 770 771 /* Restore the window name. */ 772 (void)cl_rename(sp, NULL, 0); 773 774 (void)endwin(); 775 776 /* 777 * XXX 778 * Restore the original terminal settings. This is bad -- the 779 * reset can cause character loss from the tty queue. However, 780 * we can't call endwin() in BSD curses implementations, and too 781 * many System V curses implementations don't get it right. 782 */ 783 (void)tcsetattr(STDIN_FILENO, TCSADRAIN | TCSASOFT, &clp->orig); 784 785 /* Stop the process group. */ 786 (void)kill(0, SIGTSTP); 787 788 /* Time passes ... */ 789 790 /* 791 * If we received a killer signal, we're done. Leave everything 792 * unchanged. In addition, the terminal has already been reset 793 * correctly, so leave it alone. 794 */ 795 if (clp->killersig) { 796 F_CLR(clp, CL_SCR_EX_INIT | CL_SCR_VI_INIT); 797 return (0); 798 } 799 800 /* Restore terminal settings. */ 801 wrefresh(win); /* Needed on SunOs/Solaris ? */ 802 if (F_ISSET(clp, CL_STDIN_TTY)) 803 (void)tcsetattr(STDIN_FILENO, TCSASOFT | TCSADRAIN, &t); 804 805 /* Set the window name. */ 806 (void)cl_rename(sp, sp->frp->name, 1); 807 808 /* Put the cursor keys into application mode. */ 809 (void)keypad(stdscr, TRUE); 810 811 /* Refresh and repaint the screen. */ 812 (void)wmove(win, y, x); 813 (void)cl_refresh(sp, 1); 814 815 /* If the screen changed size, set the SIGWINCH bit. */ 816 if (cl_ssize(sp, 1, NULL, NULL, &changed)) 817 return (1); 818 if (changed) 819 F_SET(CLP(sp), CL_SIGWINCH); 820 821 return (0); 822 } 823 824 /* 825 * cl_usage -- 826 * Print out the curses usage messages. 827 * 828 * PUBLIC: void cl_usage __P((void)); 829 */ 830 void 831 cl_usage(void) 832 { 833 #define USAGE "\ 834 usage: ex [-eFRrSsv] [-c command] [-t tag] [-w size] [file ...]\n\ 835 usage: vi [-eFlRrSv] [-c command] [-t tag] [-w size] [file ...]\n" 836 (void)fprintf(stderr, "%s", USAGE); 837 #undef USAGE 838 } 839 840 #ifdef DEBUG 841 /* 842 * gdbrefresh -- 843 * Stub routine so can flush out curses screen changes using gdb. 844 */ 845 static int 846 __attribute__((unused)) 847 gdbrefresh(void) 848 { 849 refresh(); 850 return (0); /* XXX Convince gdb to run it. */ 851 } 852 #endif 853