progs/tset.c

   1 /****************************************************************************
   2  * Copyright (c) 1998-2009,2010 Free Software Foundation, Inc.              *
   3  *                                                                          *
   4  * Permission is hereby granted, free of charge, to any person obtaining a  *
   5  * copy of this software and associated documentation files (the            *
   6  * "Software"), to deal in the Software without restriction, including      *
   7  * without limitation the rights to use, copy, modify, merge, publish,      *
   8  * distribute, distribute with modifications, sublicense, and/or sell       *
   9  * copies of the Software, and to permit persons to whom the Software is    *
  10  * furnished to do so, subject to the following conditions:                 *
  11  *                                                                          *
  12  * The above copyright notice and this permission notice shall be included  *
  13  * in all copies or substantial portions of the Software.                   *
  14  *                                                                          *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
  18  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
  21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
  22  *                                                                          *
  23  * Except as contained in this notice, the name(s) of the above copyright   *
  24  * holders shall not be used in advertising or otherwise to promote the     *
  25  * sale, use or other dealings in this Software without prior written       *
  26  * authorization.                                                           *
  27  ****************************************************************************/
  28
  29 /****************************************************************************
  30  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
  31  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
  32  *     and: Thomas E. Dickey                        1996-on                 *
  33  ****************************************************************************/
  34
  35 /*
  36  * Notes:
  37  * The initial adaptation from 4.4BSD Lite sources in September 1995 used 686
  38  * lines from that version, and made changes/additions for 150 lines.  There
  39  * was no reformatting, so with/without ignoring whitespace, the amount of
  40  * change is the same.
  41  *
  42  * Comparing with current (2009) source, excluding this comment:
  43  * a) 209 lines match identically to the 4.4BSD Lite sources, with 771 lines
  44  *    changed/added.
  45  * a) Ignoring whitespace, the current version still uses 516 lines from the
  46  *    4.4BSD Lite sources, with 402 lines changed/added.
  47  *
  48  * Raymond's original comment on this follows...
  49  */
  50
  51 /*
  52  * tset.c - terminal initialization utility
  53  *
  54  * This code was mostly swiped from 4.4BSD tset, with some obsolescent
  55  * cruft removed and substantial portions rewritten.  A Regents of the
  56  * University of California copyright applies to some portions of the
  57  * code, and is reproduced below:
  58  */
  59 /*-
  60  * Copyright (c) 1980, 1991, 1993
  61  *      The Regents of the University of California.  All rights reserved.
  62  *
  63  * Redistribution and use in source and binary forms, with or without
  64  * modification, are permitted provided that the following conditions
  65  * are met:
  66  * 1. Redistributions of source code must retain the above copyright
  67  *    notice, this list of conditions and the following disclaimer.
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in the
  70  *    documentation and/or other materials provided with the distribution.
  71  * 3. Neither the name of the University nor the names of its contributors
  72  *    may be used to endorse or promote products derived from this software
  73  *    without specific prior written permission.
  74  *
  75  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  76  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  77  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  78  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  79  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  80  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  81  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  82  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  83  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  84  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  85  * SUCH DAMAGE.
  86  */
  87
  88 #define USE_LIBTINFO
  89 #define __INTERNAL_CAPS_VISIBLE /* we need to see has_hardware_tabs */
  90 #include <progs.priv.h>
  91
  92 #include <errno.h>
  93 #include <stdio.h>
  94 #include <termcap.h>
  95 #include <fcntl.h>
  96
  97 #if defined(HAVE_GETTTYNAM) && HAVE_TTYENT_H
  98 #include <ttyent.h>
  99 #endif
 100 #ifdef NeXT
 101 char *ttyname(int fd);
 102 #endif
 103
 104 #ifdef HAVE_SIZECHANGE
 105 # if !defined(sun) || !TERMIOS
 106 #  if defined(HAVE_SYS_IOCTL_H)
 107 #   include <sys/ioctl.h>
 108 #  endif
 109 # endif
 110 #endif
 111
 112 #if NEED_PTEM_H
 113 /* they neglected to define struct winsize in termios.h -- it's only
 114    in termio.h  */
 115 #include <sys/stream.h>
 116 #include <sys/ptem.h>
 117 #endif
 118
 119 #include <dump_entry.h>
 120 #include <transform.h>
 121
 122 MODULE_ID("$Id: tset.c,v 1.82 2010/05/01 21:42:46 tom Exp $")
 123
 124 /*
 125  * SCO defines TIOCGSIZE and the corresponding struct.  Other systems (SunOS,
 126  * Solaris, IRIX) define TIOCGWINSZ and struct winsize.
 127  */
 128 #ifdef TIOCGSIZE
 129 # define IOCTL_GET_WINSIZE TIOCGSIZE
 130 # define IOCTL_SET_WINSIZE TIOCSSIZE
 131 # define STRUCT_WINSIZE struct ttysize
 132 # define WINSIZE_ROWS(n) n.ts_lines
 133 # define WINSIZE_COLS(n) n.ts_cols
 134 #else
 135 # ifdef TIOCGWINSZ
 136 #  define IOCTL_GET_WINSIZE TIOCGWINSZ
 137 #  define IOCTL_SET_WINSIZE TIOCSWINSZ
 138 #  define STRUCT_WINSIZE struct winsize
 139 #  define WINSIZE_ROWS(n) n.ws_row
 140 #  define WINSIZE_COLS(n) n.ws_col
 141 # endif
 142 #endif
 143
 144 #ifndef environ
 145 extern char **environ;
 146 #endif
 147
 148 #undef CTRL
 149 #define CTRL(x) ((x) & 0x1f)
 150
 151 const char *_nc_progname = "tset";
 152
 153 static TTY mode, oldmode, original;
 154
 155 static bool opt_c;              /* set control-chars */
 156 static bool opt_w;              /* set window-size */
 157
 158 static bool can_restore = FALSE;
 159 static bool isreset = FALSE;    /* invoked as reset */
 160 static int terasechar = -1;     /* new erase character */
 161 static int intrchar = -1;       /* new interrupt character */
 162 static int tkillchar = -1;      /* new kill character */
 163 static int tlines, tcolumns;    /* window size */
 164
 165 #define LOWERCASE(c) ((isalpha(UChar(c)) && isupper(UChar(c))) ? tolower(UChar(c)) : (c))
 166
 167 static int
 168 CaselessCmp(const char *a, const char *b)
 169 {                               /* strcasecmp isn't portable */
 170     while (*a && *b) {
 171         int cmp = LOWERCASE(*a) - LOWERCASE(*b);
 172         if (cmp != 0)
 173             break;
 174         a++, b++;
 175     }
 176     return LOWERCASE(*a) - LOWERCASE(*b);
 177 }
 178
 179 static void
 180 exit_error(void)
 181 {
 182     if (can_restore)
 183         SET_TTY(STDERR_FILENO, &original);
 184     (void) fprintf(stderr, "\n");
 185     fflush(stderr);
 186     ExitProgram(EXIT_FAILURE);
 187     /* NOTREACHED */
 188 }
 189
 190 static void
 191 err(const char *fmt,...)
 192 {
 193     va_list ap;
 194     va_start(ap, fmt);
 195     (void) fprintf(stderr, "%s: ", _nc_progname);
 196     (void) vfprintf(stderr, fmt, ap);
 197     va_end(ap);
 198     exit_error();
 199     /* NOTREACHED */
 200 }
 201
 202 static void
 203 failed(const char *msg)
 204 {
 205     char temp[BUFSIZ];
 206     unsigned len = strlen(_nc_progname) + 2;
 207
 208     if ((int) len < (int) sizeof(temp) - 12) {
 209         strcpy(temp, _nc_progname);
 210         strcat(temp, ": ");
 211     } else {
 212         strcpy(temp, "tset: ");
 213     }
 214     perror(strncat(temp, msg, sizeof(temp) - strlen(temp) - 2));
 215     exit_error();
 216     /* NOTREACHED */
 217 }
 218
 219 static void
 220 cat(char *file)
 221 {
 222     FILE *fp;
 223     size_t nr;
 224     char buf[BUFSIZ];
 225
 226     if ((fp = fopen(file, "r")) == 0)
 227         failed(file);
 228
 229     while ((nr = fread(buf, sizeof(char), sizeof(buf), fp)) != 0)
 230         if (fwrite(buf, sizeof(char), nr, stderr) != nr)
 231               failed("write to stderr");
 232     fclose(fp);
 233 }
 234
 235 static int
 236 outc(int c)
 237 {
 238     return putc(c, stderr);
 239 }
 240
 241 /* Prompt the user for a terminal type. */
 242 static const char *
 243 askuser(const char *dflt)
 244 {
 245     static char answer[256];
 246     char *p;
 247
 248     /* We can get recalled; if so, don't continue uselessly. */
 249     clearerr(stdin);
 250     if (feof(stdin) || ferror(stdin)) {
 251         (void) fprintf(stderr, "\n");
 252         exit_error();
 253         /* NOTREACHED */
 254     }
 255     for (;;) {
 256         if (dflt)
 257             (void) fprintf(stderr, "Terminal type? [%s] ", dflt);
 258         else
 259             (void) fprintf(stderr, "Terminal type? ");
 260         (void) fflush(stderr);
 261
 262         if (fgets(answer, sizeof(answer), stdin) == 0) {
 263             if (dflt == 0) {
 264                 exit_error();
 265                 /* NOTREACHED */
 266             }
 267             return (dflt);
 268         }
 269
 270         if ((p = strchr(answer, '\n')) != 0)
 271             *p = '\0';
 272         if (answer[0])
 273             return (answer);
 274         if (dflt != 0)
 275             return (dflt);
 276     }
 277 }
 278
 279 /**************************************************************************
 280  *
 281  * Mapping logic begins here
 282  *
 283  **************************************************************************/
 284
 285 /* Baud rate conditionals for mapping. */
 286 #define GT              0x01
 287 #define EQ              0x02
 288 #define LT              0x04
 289 #define NOT             0x08
 290 #define GE              (GT | EQ)
 291 #define LE              (LT | EQ)
 292
 293 typedef struct map {
 294     struct map *next;           /* Linked list of maps. */
 295     const char *porttype;       /* Port type, or "" for any. */
 296     const char *type;           /* Terminal type to select. */
 297     int conditional;            /* Baud rate conditionals bitmask. */
 298     int speed;                  /* Baud rate to compare against. */
 299 } MAP;
 300
 301 static MAP *cur, *maplist;
 302
 303 typedef struct speeds {
 304     const char *string;
 305     int speed;
 306 } SPEEDS;
 307
 308 static const SPEEDS speeds[] =
 309 {
 310     {"0", B0},
 311     {"50", B50},
 312     {"75", B75},
 313     {"110", B110},
 314     {"134", B134},
 315     {"134.5", B134},
 316     {"150", B150},
 317     {"200", B200},
 318     {"300", B300},
 319     {"600", B600},
 320     {"1200", B1200},
 321     {"1800", B1800},
 322     {"2400", B2400},
 323     {"4800", B4800},
 324     {"9600", B9600},
 325     /* sgttyb may define up to this point */
 326 #ifdef B19200
 327     {"19200", B19200},
 328 #endif
 329 #ifdef B38400
 330     {"38400", B38400},
 331 #endif
 332 #ifdef B19200
 333     {"19200", B19200},
 334 #endif
 335 #ifdef B38400
 336     {"38400", B38400},
 337 #endif
 338 #ifdef B19200
 339     {"19200", B19200},
 340 #else
 341 #ifdef EXTA
 342     {"19200", EXTA},
 343 #endif
 344 #endif
 345 #ifdef B38400
 346     {"38400", B38400},
 347 #else
 348 #ifdef EXTB
 349     {"38400", EXTB},
 350 #endif
 351 #endif
 352 #ifdef B57600
 353     {"57600", B57600},
 354 #endif
 355 #ifdef B115200
 356     {"115200", B115200},
 357 #endif
 358 #ifdef B230400
 359     {"230400", B230400},
 360 #endif
 361 #ifdef B460800
 362     {"460800", B460800},
 363 #endif
 364     {(char *) 0, 0}
 365 };
 366
 367 static int
 368 tbaudrate(char *rate)
 369 {
 370     const SPEEDS *sp;
 371     int found = FALSE;
 372
 373     /* The baudrate number can be preceded by a 'B', which is ignored. */
 374     if (*rate == 'B')
 375         ++rate;
 376
 377     for (sp = speeds; sp->string; ++sp) {
 378         if (!CaselessCmp(rate, sp->string)) {
 379             found = TRUE;
 380             break;
 381         }
 382     }
 383     if (!found)
 384         err("unknown baud rate %s", rate);
 385     return (sp->speed);
 386 }
 387
 388 /*
 389  * Syntax for -m:
 390  * [port-type][test baudrate]:terminal-type
 391  * The baud rate tests are: >, <, @, =, !
 392  */
 393 static void
 394 add_mapping(const char *port, char *arg)
 395 {
 396     MAP *mapp;
 397     char *copy, *p;
 398     const char *termp;
 399     char *base = 0;
 400
 401     copy = strdup(arg);
 402     mapp = typeMalloc(MAP, 1);
 403     if (copy == 0 || mapp == 0)
 404         failed("malloc");
 405
 406     assert(copy != 0);
 407     assert(mapp != 0);
 408
 409     mapp->next = 0;
 410     if (maplist == 0)
 411         cur = maplist = mapp;
 412     else {
 413         cur->next = mapp;
 414         cur = mapp;
 415     }
 416
 417     mapp->porttype = arg;
 418     mapp->conditional = 0;
 419
 420     arg = strpbrk(arg, "><@=!:");
 421
 422     if (arg == 0) {             /* [?]term */
 423         mapp->type = mapp->porttype;
 424         mapp->porttype = 0;
 425         goto done;
 426     }
 427
 428     if (arg == mapp->porttype)  /* [><@=! baud]:term */
 429         termp = mapp->porttype = 0;
 430     else
 431         termp = base = arg;
 432
 433     for (;; ++arg) {            /* Optional conditionals. */
 434         switch (*arg) {
 435         case '<':
 436             if (mapp->conditional & GT)
 437                 goto badmopt;
 438             mapp->conditional |= LT;
 439             break;
 440         case '>':
 441             if (mapp->conditional & LT)
 442                 goto badmopt;
 443             mapp->conditional |= GT;
 444             break;
 445         case '@':
 446         case '=':               /* Not documented. */
 447             mapp->conditional |= EQ;
 448             break;
 449         case '!':
 450             mapp->conditional |= NOT;
 451             break;
 452         default:
 453             goto next;
 454         }
 455     }
 456
 457   next:
 458     if (*arg == ':') {
 459         if (mapp->conditional)
 460             goto badmopt;
 461         ++arg;
 462     } else {                    /* Optional baudrate. */
 463         arg = strchr(p = arg, ':');
 464         if (arg == 0)
 465             goto badmopt;
 466         *arg++ = '\0';
 467         mapp->speed = tbaudrate(p);
 468     }
 469
 470     if (arg == (char *) 0)      /* Non-optional type. */
 471         goto badmopt;
 472
 473     mapp->type = arg;
 474
 475     /* Terminate porttype, if specified. */
 476     if (termp != 0)
 477         *base = '\0';
 478
 479     /* If a NOT conditional, reverse the test. */
 480     if (mapp->conditional & NOT)
 481         mapp->conditional = ~mapp->conditional & (EQ | GT | LT);
 482
 483     /* If user specified a port with an option flag, set it. */
 484   done:
 485     if (port) {
 486         if (mapp->porttype) {
 487           badmopt:
 488             err("illegal -m option format: %s", copy);
 489         }
 490         mapp->porttype = port;
 491     }
 492     free(copy);
 493 #ifdef MAPDEBUG
 494     (void) printf("port: %s\n", mapp->porttype ? mapp->porttype : "ANY");
 495     (void) printf("type: %s\n", mapp->type);
 496     (void) printf("conditional: ");
 497     p = "";
 498     if (mapp->conditional & GT) {
 499         (void) printf("GT");
 500         p = "/";
 501     }
 502     if (mapp->conditional & EQ) {
 503         (void) printf("%sEQ", p);
 504         p = "/";
 505     }
 506     if (mapp->conditional & LT)
 507         (void) printf("%sLT", p);
 508     (void) printf("\nspeed: %d\n", mapp->speed);
 509 #endif
 510 }
 511
 512 /*
 513  * Return the type of terminal to use for a port of type 'type', as specified
 514  * by the first applicable mapping in 'map'.  If no mappings apply, return
 515  * 'type'.
 516  */
 517 static const char *
 518 mapped(const char *type)
 519 {
 520     MAP *mapp;
 521     int match;
 522
 523     for (mapp = maplist; mapp; mapp = mapp->next)
 524         if (mapp->porttype == 0 || !strcmp(mapp->porttype, type)) {
 525             switch (mapp->conditional) {
 526             case 0:             /* No test specified. */
 527                 match = TRUE;
 528                 break;
 529             case EQ:
 530                 match = (ospeed == mapp->speed);
 531                 break;
 532             case GE:
 533                 match = (ospeed >= mapp->speed);
 534                 break;
 535             case GT:
 536                 match = (ospeed > mapp->speed);
 537                 break;
 538             case LE:
 539                 match = (ospeed <= mapp->speed);
 540                 break;
 541             case LT:
 542                 match = (ospeed < mapp->speed);
 543                 break;
 544             default:
 545                 match = FALSE;
 546             }
 547             if (match)
 548                 return (mapp->type);
 549         }
 550     /* No match found; return given type. */
 551     return (type);
 552 }
 553
 554 /**************************************************************************
 555  *
 556  * Entry fetching
 557  *
 558  **************************************************************************/
 559
 560 /*
 561  * Figure out what kind of terminal we're dealing with, and then read in
 562  * its termcap entry.
 563  */
 564 static const char *
 565 get_termcap_entry(char *userarg)
 566 {
 567     int errret;
 568     char *p;
 569     const char *ttype;
 570 #if defined(HAVE_GETTTYNAM)
 571     struct ttyent *t;
 572 #else
 573     FILE *fp;
 574 #endif
 575     char *ttypath;
 576
 577     if (userarg) {
 578         ttype = userarg;
 579         goto found;
 580     }
 581
 582     /* Try the environment. */
 583     if ((ttype = getenv("TERM")) != 0)
 584         goto map;
 585
 586     if ((ttypath = ttyname(STDERR_FILENO)) != 0) {
 587         p = _nc_basename(ttypath);
 588 #if defined(HAVE_GETTTYNAM)
 589         /*
 590          * We have the 4.3BSD library call getttynam(3); that means
 591          * there's an /etc/ttys to look up device-to-type mappings in.
 592          * Try ttyname(3); check for dialup or other mapping.
 593          */
 594         if ((t = getttynam(p))) {
 595             ttype = t->ty_type;
 596             goto map;
 597         }
 598 #else
 599         if ((fp = fopen("/etc/ttytype", "r")) != 0
 600             || (fp = fopen("/etc/ttys", "r")) != 0) {
 601             char buffer[BUFSIZ];
 602             char *s, *t, *d;
 603
 604             while (fgets(buffer, sizeof(buffer) - 1, fp) != 0) {
 605                 for (s = buffer, t = d = 0; *s; s++) {
 606                     if (isspace(UChar(*s)))
 607                         *s = '\0';
 608                     else if (t == 0)
 609                         t = s;
 610                     else if (d == 0 && s != buffer && s[-1] == '\0')
 611                         d = s;
 612                 }
 613                 if (t != 0 && d != 0 && !strcmp(d, p)) {
 614                     ttype = strdup(t);
 615                     fclose(fp);
 616                     goto map;
 617                 }
 618             }
 619             fclose(fp);
 620         }
 621 #endif /* HAVE_GETTTYNAM */
 622     }
 623
 624     /* If still undefined, use "unknown". */
 625     ttype = "unknown";
 626
 627   map:ttype = mapped(ttype);
 628
 629     /*
 630      * If not a path, remove TERMCAP from the environment so we get a
 631      * real entry from /etc/termcap.  This prevents us from being fooled
 632      * by out of date stuff in the environment.
 633      */
 634   found:if ((p = getenv("TERMCAP")) != 0 && !_nc_is_abs_path(p)) {
 635         /* 'unsetenv("TERMCAP")' is not portable.
 636          * The 'environ' array is better.
 637          */
 638         int n;
 639         for (n = 0; environ[n] != 0; n++) {
 640             if (!strncmp("TERMCAP=", environ[n], 8)) {
 641                 while ((environ[n] = environ[n + 1]) != 0) {
 642                     n++;
 643                 }
 644                 break;
 645             }
 646         }
 647     }
 648
 649     /*
 650      * ttype now contains a pointer to the type of the terminal.
 651      * If the first character is '?', ask the user.
 652      */
 653     if (ttype[0] == '?') {
 654         if (ttype[1] != '\0')
 655             ttype = askuser(ttype + 1);
 656         else
 657             ttype = askuser(0);
 658     }
 659     /* Find the terminfo entry.  If it doesn't exist, ask the user. */
 660     while (setupterm((NCURSES_CONST char *) ttype, STDOUT_FILENO, &errret)
 661            != OK) {
 662         if (errret == 0) {
 663             (void) fprintf(stderr, "%s: unknown terminal type %s\n",
 664                            _nc_progname, ttype);
 665             ttype = 0;
 666         } else {
 667             (void) fprintf(stderr,
 668                            "%s: can't initialize terminal type %s (error %d)\n",
 669                            _nc_progname, ttype, errret);
 670             ttype = 0;
 671         }
 672         ttype = askuser(ttype);
 673     }
 674 #if BROKEN_LINKER
 675     tgetflag("am");             /* force lib_termcap.o to be linked for 'ospeed' */
 676 #endif
 677     return (ttype);
 678 }
 679
 680 /**************************************************************************
 681  *
 682  * Mode-setting logic
 683  *
 684  **************************************************************************/
 685
 686 /* some BSD systems have these built in, some systems are missing
 687  * one or more definitions. The safest solution is to override unless the
 688  * commonly-altered ones are defined.
 689  */
 690 #if !(defined(CERASE) && defined(CINTR) && defined(CKILL) && defined(CQUIT))
 691 #undef CEOF
 692 #undef CERASE
 693 #undef CINTR
 694 #undef CKILL
 695 #undef CLNEXT
 696 #undef CRPRNT
 697 #undef CQUIT
 698 #undef CSTART
 699 #undef CSTOP
 700 #undef CSUSP
 701 #endif
 702
 703 /* control-character defaults */
 704 #ifndef CEOF
 705 #define CEOF    CTRL('D')
 706 #endif
 707 #ifndef CERASE
 708 #define CERASE  CTRL('H')
 709 #endif
 710 #ifndef CINTR
 711 #define CINTR   127             /* ^? */
 712 #endif
 713 #ifndef CKILL
 714 #define CKILL   CTRL('U')
 715 #endif
 716 #ifndef CLNEXT
 717 #define CLNEXT  CTRL('v')
 718 #endif
 719 #ifndef CRPRNT
 720 #define CRPRNT  CTRL('r')
 721 #endif
 722 #ifndef CQUIT
 723 #define CQUIT   CTRL('\\')
 724 #endif
 725 #ifndef CSTART
 726 #define CSTART  CTRL('Q')
 727 #endif
 728 #ifndef CSTOP
 729 #define CSTOP   CTRL('S')
 730 #endif
 731 #ifndef CSUSP
 732 #define CSUSP   CTRL('Z')
 733 #endif
 734
 735 #if defined(_POSIX_VDISABLE)
 736 #define DISABLED(val)   (((_POSIX_VDISABLE != -1) \
 737                        && ((val) == _POSIX_VDISABLE)) \
 738                       || ((val) <= 0))
 739 #else
 740 #define DISABLED(val)   ((int)(val) <= 0)
 741 #endif
 742
 743 #define CHK(val, dft)   (DISABLED(val) ? dft : val)
 744
 745 static bool set_tabs(void);
 746
 747 /*
 748  * Reset the terminal mode bits to a sensible state.  Very useful after
 749  * a child program dies in raw mode.
 750  */
 751 static void
 752 reset_mode(void)
 753 {
 754 #ifdef TERMIOS
 755     tcgetattr(STDERR_FILENO, &mode);
 756 #else
 757     stty(STDERR_FILENO, &mode);
 758 #endif
 759
 760 #ifdef TERMIOS
 761 #if defined(VDISCARD) && defined(CDISCARD)
 762     mode.c_cc[VDISCARD] = CHK(mode.c_cc[VDISCARD], CDISCARD);
 763 #endif
 764     mode.c_cc[VEOF] = CHK(mode.c_cc[VEOF], CEOF);
 765     mode.c_cc[VERASE] = CHK(mode.c_cc[VERASE], CERASE);
 766 #if defined(VFLUSH) && defined(CFLUSH)
 767     mode.c_cc[VFLUSH] = CHK(mode.c_cc[VFLUSH], CFLUSH);
 768 #endif
 769     mode.c_cc[VINTR] = CHK(mode.c_cc[VINTR], CINTR);
 770     mode.c_cc[VKILL] = CHK(mode.c_cc[VKILL], CKILL);
 771 #if defined(VLNEXT) && defined(CLNEXT)
 772     mode.c_cc[VLNEXT] = CHK(mode.c_cc[VLNEXT], CLNEXT);
 773 #endif
 774     mode.c_cc[VQUIT] = CHK(mode.c_cc[VQUIT], CQUIT);
 775 #if defined(VREPRINT) && defined(CRPRNT)
 776     mode.c_cc[VREPRINT] = CHK(mode.c_cc[VREPRINT], CRPRNT);
 777 #endif
 778 #if defined(VSTART) && defined(CSTART)
 779     mode.c_cc[VSTART] = CHK(mode.c_cc[VSTART], CSTART);
 780 #endif
 781 #if defined(VSTOP) && defined(CSTOP)
 782     mode.c_cc[VSTOP] = CHK(mode.c_cc[VSTOP], CSTOP);
 783 #endif
 784 #if defined(VSUSP) && defined(CSUSP)
 785     mode.c_cc[VSUSP] = CHK(mode.c_cc[VSUSP], CSUSP);
 786 #endif
 787 #if defined(VWERASE) && defined(CWERASE)
 788     mode.c_cc[VWERASE] = CHK(mode.c_cc[VWERASE], CWERASE);
 789 #endif
 790
 791     mode.c_iflag &= ~(IGNBRK | PARMRK | INPCK | ISTRIP | INLCR | IGNCR
 792 #ifdef IUCLC
 793                       | IUCLC
 794 #endif
 795 #ifdef IXANY
 796                       | IXANY
 797 #endif
 798                       | IXOFF);
 799
 800     mode.c_iflag |= (BRKINT | IGNPAR | ICRNL | IXON
 801 #ifdef IMAXBEL
 802                      | IMAXBEL
 803 #endif
 804         );
 805
 806     mode.c_oflag &= ~(0
 807 #ifdef OLCUC
 808                       | OLCUC
 809 #endif
 810 #ifdef OCRNL
 811                       | OCRNL
 812 #endif
 813 #ifdef ONOCR
 814                       | ONOCR
 815 #endif
 816 #ifdef ONLRET
 817                       | ONLRET
 818 #endif
 819 #ifdef OFILL
 820                       | OFILL
 821 #endif
 822 #ifdef OFDEL
 823                       | OFDEL
 824 #endif
 825 #ifdef NLDLY
 826                       | NLDLY
 827 #endif
 828 #ifdef CRDLY
 829                       | CRDLY
 830 #endif
 831 #ifdef TABDLY
 832                       | TABDLY
 833 #endif
 834 #ifdef BSDLY
 835                       | BSDLY
 836 #endif
 837 #ifdef VTDLY
 838                       | VTDLY
 839 #endif
 840 #ifdef FFDLY
 841                       | FFDLY
 842 #endif
 843         );
 844
 845     mode.c_oflag |= (OPOST
 846 #ifdef ONLCR
 847                      | ONLCR
 848 #endif
 849         );
 850
 851     mode.c_cflag &= ~(CSIZE | CSTOPB | PARENB | PARODD | CLOCAL);
 852     mode.c_cflag |= (CS8 | CREAD);
 853     mode.c_lflag &= ~(ECHONL | NOFLSH
 854 #ifdef TOSTOP
 855                       | TOSTOP
 856 #endif
 857 #ifdef ECHOPTR
 858                       | ECHOPRT
 859 #endif
 860 #ifdef XCASE
 861                       | XCASE
 862 #endif
 863         );
 864
 865     mode.c_lflag |= (ISIG | ICANON | ECHO | ECHOE | ECHOK
 866 #ifdef ECHOCTL
 867                      | ECHOCTL
 868 #endif
 869 #ifdef ECHOKE
 870                      | ECHOKE
 871 #endif
 872         );
 873 #endif
 874
 875     SET_TTY(STDERR_FILENO, &mode);
 876 }
 877
 878 /*
 879  * Returns a "good" value for the erase character.  This is loosely based on
 880  * the BSD4.4 logic.
 881  */
 882 #ifdef TERMIOS
 883 static int
 884 default_erase(void)
 885 {
 886     int result;
 887
 888     if (over_strike
 889         && key_backspace != 0
 890         && strlen(key_backspace) == 1)
 891         result = key_backspace[0];
 892     else
 893         result = CERASE;
 894
 895     return result;
 896 }
 897 #endif
 898
 899 /*
 900  * Update the values of the erase, interrupt, and kill characters in 'mode'.
 901  *
 902  * SVr4 tset (e.g., Solaris 2.5) only modifies the intr, quit or erase
 903  * characters if they're unset, or if we specify them as options.  This differs
 904  * from BSD 4.4 tset, which always sets erase.
 905  */
 906 static void
 907 set_control_chars(void)
 908 {
 909 #ifdef TERMIOS
 910     if (DISABLED(mode.c_cc[VERASE]) || terasechar >= 0)
 911         mode.c_cc[VERASE] = (terasechar >= 0) ? terasechar : default_erase();
 912
 913     if (DISABLED(mode.c_cc[VINTR]) || intrchar >= 0)
 914         mode.c_cc[VINTR] = (intrchar >= 0) ? intrchar : CINTR;
 915
 916     if (DISABLED(mode.c_cc[VKILL]) || tkillchar >= 0)
 917         mode.c_cc[VKILL] = (tkillchar >= 0) ? tkillchar : CKILL;
 918 #endif
 919 }
 920
 921 /*
 922  * Set up various conversions in 'mode', including parity, tabs, returns,
 923  * echo, and case, according to the termcap entry.  If the program we're
 924  * running was named with a leading upper-case character, map external
 925  * uppercase to internal lowercase.
 926  */
 927 static void
 928 set_conversions(void)
 929 {
 930 #ifdef __OBSOLETE__
 931     /*
 932      * Conversion logic for some *really* ancient terminal glitches,
 933      * not supported in terminfo.  Left here for succeeding generations
 934      * to marvel at.
 935      */
 936     if (tgetflag("UC")) {
 937 #ifdef IUCLC
 938         mode.c_iflag |= IUCLC;
 939         mode.c_oflag |= OLCUC;
 940 #endif
 941     } else if (tgetflag("LC")) {
 942 #ifdef IUCLC
 943         mode.c_iflag &= ~IUCLC;
 944         mode.c_oflag &= ~OLCUC;
 945 #endif
 946     }
 947     mode.c_iflag &= ~(PARMRK | INPCK);
 948     mode.c_lflag |= ICANON;
 949     if (tgetflag("EP")) {
 950         mode.c_cflag |= PARENB;
 951         mode.c_cflag &= ~PARODD;
 952     }
 953     if (tgetflag("OP")) {
 954         mode.c_cflag |= PARENB;
 955         mode.c_cflag |= PARODD;
 956     }
 957 #endif /* __OBSOLETE__ */
 958
 959 #ifdef TERMIOS
 960 #ifdef ONLCR
 961     mode.c_oflag |= ONLCR;
 962 #endif
 963     mode.c_iflag |= ICRNL;
 964     mode.c_lflag |= ECHO;
 965 #ifdef OXTABS
 966     mode.c_oflag |= OXTABS;
 967 #endif /* OXTABS */
 968
 969     /* test used to be tgetflag("NL") */
 970     if (newline != (char *) 0 && newline[0] == '\n' && !newline[1]) {
 971         /* Newline, not linefeed. */
 972 #ifdef ONLCR
 973         mode.c_oflag &= ~ONLCR;
 974 #endif
 975         mode.c_iflag &= ~ICRNL;
 976     }
 977 #ifdef __OBSOLETE__
 978     if (tgetflag("HD"))         /* Half duplex. */
 979         mode.c_lflag &= ~ECHO;
 980 #endif /* __OBSOLETE__ */
 981 #ifdef OXTABS
 982     /* test used to be tgetflag("pt") */
 983     if (has_hardware_tabs)      /* Print tabs. */
 984         mode.c_oflag &= ~OXTABS;
 985 #endif /* OXTABS */
 986     mode.c_lflag |= (ECHOE | ECHOK);
 987 #endif
 988 }
 989
 990 /* Output startup string. */
 991 static void
 992 set_init(void)
 993 {
 994     char *p;
 995     bool settle;
 996
 997 #ifdef __OBSOLETE__
 998     if (pad_char != (char *) 0) /* Get/set pad character. */
 999         PC = pad_char[0];
1000 #endif /* OBSOLETE */
1001
1002 #ifdef TAB3
1003     if (oldmode.c_oflag & (TAB3 | ONLCR | OCRNL | ONLRET)) {
1004         oldmode.c_oflag &= (TAB3 | ONLCR | OCRNL | ONLRET);
1005         SET_TTY(STDERR_FILENO, &oldmode);
1006     }
1007 #endif
1008     settle = set_tabs();
1009
1010     if (isreset) {
1011         if ((p = reset_1string) != 0) {
1012             tputs(p, 0, outc);
1013             settle = TRUE;
1014         }
1015         if ((p = reset_2string) != 0) {
1016             tputs(p, 0, outc);
1017             settle = TRUE;
1018         }
1019         /* What about rf, rs3, as per terminfo man page? */
1020         /* also might be nice to send rmacs, rmul, rmm */
1021         if ((p = reset_file) != 0
1022             || (p = init_file) != 0) {
1023             cat(p);
1024             settle = TRUE;
1025         }
1026     }
1027
1028     if (settle) {
1029         (void) putc('\r', stderr);
1030         (void) fflush(stderr);
1031         (void) napms(1000);     /* Settle the terminal. */
1032     }
1033 }
1034
1035 /*
1036  * Set the hardware tabs on the terminal, using the ct (clear all tabs),
1037  * st (set one tab) and ch (horizontal cursor addressing) capabilities.
1038  * This is done before if and is, so they can patch in case we blow this.
1039  * Return TRUE if we set any tab stops, FALSE if not.
1040  */
1041 static bool
1042 set_tabs(void)
1043 {
1044     if (set_tab && clear_all_tabs) {
1045         int c;
1046
1047         (void) putc('\r', stderr);      /* Force to left margin. */
1048         tputs(clear_all_tabs, 0, outc);
1049
1050         for (c = 8; c < tcolumns; c += 8) {
1051             /* Get to the right column.  In BSD tset, this
1052              * used to try a bunch of half-clever things
1053              * with cup and hpa, for an average saving of
1054              * somewhat less than two character times per
1055              * tab stop, less than .01 sec at 2400cps. We
1056              * lost all this cruft because it seemed to be
1057              * introducing some odd bugs.
1058              * -----------12345678----------- */
1059             (void) fputs("        ", stderr);
1060             tputs(set_tab, 0, outc);
1061         }
1062         putc('\r', stderr);
1063         return (TRUE);
1064     }
1065     return (FALSE);
1066 }
1067
1068 /**************************************************************************
1069  *
1070  * Main sequence
1071  *
1072  **************************************************************************/
1073
1074 /*
1075  * Tell the user if a control key has been changed from the default value.
1076  */
1077 #ifdef TERMIOS
1078 static void
1079 report(const char *name, int which, unsigned def)
1080 {
1081     unsigned older, newer;
1082     char *p;
1083
1084     newer = mode.c_cc[which];
1085     older = oldmode.c_cc[which];
1086
1087     if (older == newer && older == def)
1088         return;
1089
1090     (void) fprintf(stderr, "%s %s ", name, older == newer ? "is" : "set to");
1091
1092     if (DISABLED(newer))
1093         (void) fprintf(stderr, "undef.\n");
1094     /*
1095      * Check 'delete' before 'backspace', since the key_backspace value
1096      * is ambiguous.
1097      */
1098     else if (newer == 0177)
1099         (void) fprintf(stderr, "delete.\n");
1100     else if ((p = key_backspace) != 0
1101              && newer == (unsigned char) p[0]
1102              && p[1] == '\0')
1103         (void) fprintf(stderr, "backspace.\n");
1104     else if (newer < 040) {
1105         newer ^= 0100;
1106         (void) fprintf(stderr, "control-%c (^%c).\n", UChar(newer), UChar(newer));
1107     } else
1108         (void) fprintf(stderr, "%c.\n", UChar(newer));
1109 }
1110 #endif
1111
1112 /*
1113  * Convert the obsolete argument forms into something that getopt can handle.
1114  * This means that -e, -i and -k get default arguments supplied for them.
1115  */
1116 static void
1117 obsolete(char **argv)
1118 {
1119     for (; *argv; ++argv) {
1120         char *parm = argv[0];
1121
1122         if (parm[0] == '-' && parm[1] == '\0') {
1123             argv[0] = strdup("-q");
1124             continue;
1125         }
1126
1127         if ((parm[0] != '-')
1128             || (argv[1] && argv[1][0] != '-')
1129             || (parm[1] != 'e' && parm[1] != 'i' && parm[1] != 'k')
1130             || (parm[2] != '\0'))
1131             continue;
1132         switch (argv[0][1]) {
1133         case 'e':
1134             argv[0] = strdup("-e^H");
1135             break;
1136         case 'i':
1137             argv[0] = strdup("-i^C");
1138             break;
1139         case 'k':
1140             argv[0] = strdup("-k^U");
1141             break;
1142         }
1143     }
1144 }
1145
1146 static void
1147 usage(void)
1148 {
1149     static const char *tbl[] =
1150     {
1151         ""
1152         ,"Options:"
1153         ,"  -c          set control characters"
1154         ,"  -e ch       erase character"
1155         ,"  -I          no initialization strings"
1156         ,"  -i ch       interrupt character"
1157         ,"  -k ch       kill character"
1158         ,"  -m mapping  map identifier to type"
1159         ,"  -Q          do not output control key settings"
1160         ,"  -r          display term on stderr"
1161         ,"  -s          output TERM set command"
1162         ,"  -V          print curses-version"
1163         ,"  -w          set window-size"
1164     };
1165     unsigned n;
1166     (void) fprintf(stderr, "Usage: %s [options] [terminal]\n", _nc_progname);
1167     for (n = 0; n < sizeof(tbl) / sizeof(tbl[0]); ++n)
1168         fprintf(stderr, "%s\n", tbl[n]);
1169     exit_error();
1170     /* NOTREACHED */
1171 }
1172
1173 static char
1174 arg_to_char(void)
1175 {
1176     return (char) ((optarg[0] == '^' && optarg[1] != '\0')
1177                    ? ((optarg[1] == '?') ? '\177' : CTRL(optarg[1]))
1178                    : optarg[0]);
1179 }
1180
1181 int
1182 main(int argc, char **argv)
1183 {
1184     int ch, noinit, noset, quiet, Sflag, sflag, showterm;
1185     const char *p;
1186     const char *ttype;
1187
1188     obsolete(argv);
1189     noinit = noset = quiet = Sflag = sflag = showterm = 0;
1190     while ((ch = getopt(argc, argv, "a:cd:e:Ii:k:m:np:qQSrsVw")) != -1) {
1191         switch (ch) {
1192         case 'c':               /* set control-chars */
1193             opt_c = TRUE;
1194             break;
1195         case 'a':               /* OBSOLETE: map identifier to type */
1196             add_mapping("arpanet", optarg);
1197             break;
1198         case 'd':               /* OBSOLETE: map identifier to type */
1199             add_mapping("dialup", optarg);
1200             break;
1201         case 'e':               /* erase character */
1202             terasechar = arg_to_char();
1203             break;
1204         case 'I':               /* no initialization strings */
1205             noinit = 1;
1206             break;
1207         case 'i':               /* interrupt character */
1208             intrchar = arg_to_char();
1209             break;
1210         case 'k':               /* kill character */
1211             tkillchar = arg_to_char();
1212             break;
1213         case 'm':               /* map identifier to type */
1214             add_mapping(0, optarg);
1215             break;
1216         case 'n':               /* OBSOLETE: set new tty driver */
1217             break;
1218         case 'p':               /* OBSOLETE: map identifier to type */
1219             add_mapping("plugboard", optarg);
1220             break;
1221         case 'Q':               /* don't output control key settings */
1222             quiet = 1;
1223             break;
1224         case 'q':               /* display term only */
1225             noset = 1;
1226             break;
1227         case 'r':               /* display term on stderr */
1228             showterm = 1;
1229             break;
1230         case 'S':               /* OBSOLETE: output TERM & TERMCAP */
1231             Sflag = 1;
1232             break;
1233         case 's':               /* output TERM set command */
1234             sflag = 1;
1235             break;
1236         case 'V':               /* print curses-version */
1237             puts(curses_version());
1238             ExitProgram(EXIT_SUCCESS);
1239         case 'w':               /* set window-size */
1240             opt_w = TRUE;
1241             break;
1242         case '?':
1243         default:
1244             usage();
1245         }
1246     }
1247
1248     _nc_progname = _nc_rootname(*argv);
1249     argc -= optind;
1250     argv += optind;
1251
1252     if (argc > 1)
1253         usage();
1254
1255     if (!opt_c && !opt_w)
1256         opt_c = opt_w = TRUE;
1257
1258     if (GET_TTY(STDERR_FILENO, &mode) < 0)
1259         failed("standard error");
1260     can_restore = TRUE;
1261     original = oldmode = mode;
1262 #ifdef TERMIOS
1263     ospeed = (NCURSES_OSPEED) cfgetospeed(&mode);
1264 #else
1265     ospeed = (NCURSES_OSPEED) mode.sg_ospeed;
1266 #endif
1267
1268     if (same_program(_nc_progname, PROG_RESET)) {
1269         isreset = TRUE;
1270         reset_mode();
1271     }
1272
1273     (void) get_termcap_entry(*argv);
1274
1275     if (!noset) {
1276         tcolumns = columns;
1277         tlines = lines;
1278
1279 #ifdef HAVE_SIZECHANGE
1280         if (opt_w) {
1281             STRUCT_WINSIZE win;
1282             /* Set window size if not set already */
1283             (void) ioctl(STDERR_FILENO, IOCTL_GET_WINSIZE, &win);
1284             if (WINSIZE_ROWS(win) == 0 &&
1285                 WINSIZE_COLS(win) == 0 &&
1286                 tlines > 0 && tcolumns > 0) {
1287                 WINSIZE_ROWS(win) = tlines;
1288                 WINSIZE_COLS(win) = tcolumns;
1289                 (void) ioctl(STDERR_FILENO, IOCTL_SET_WINSIZE, &win);
1290             }
1291         }
1292 #endif
1293         if (opt_c) {
1294             set_control_chars();
1295             set_conversions();
1296
1297             if (!noinit)
1298                 set_init();
1299
1300             /* Set the modes if they've changed. */
1301             if (memcmp(&mode, &oldmode, sizeof(mode))) {
1302                 SET_TTY(STDERR_FILENO, &mode);
1303             }
1304         }
1305     }
1306
1307     /* Get the terminal name from the entry. */
1308     ttype = _nc_first_name(cur_term->type.term_names);
1309
1310     if (noset)
1311         (void) printf("%s\n", ttype);
1312     else {
1313         if (showterm)
1314             (void) fprintf(stderr, "Terminal type is %s.\n", ttype);
1315         /*
1316          * If erase, kill and interrupt characters could have been
1317          * modified and not -Q, display the changes.
1318          */
1319 #ifdef TERMIOS
1320         if (!quiet) {
1321             report("Erase", VERASE, CERASE);
1322             report("Kill", VKILL, CKILL);
1323             report("Interrupt", VINTR, CINTR);
1324         }
1325 #endif
1326     }
1327
1328     if (Sflag)
1329         err("The -S option is not supported under terminfo.");
1330
1331     if (sflag) {
1332         int len;
1333         char *var;
1334         char *leaf;
1335         /*
1336          * Figure out what shell we're using.  A hack, we look for an
1337          * environmental variable SHELL ending in "csh".
1338          */
1339         if ((var = getenv("SHELL")) != 0
1340             && ((len = (int) strlen(leaf = _nc_basename(var))) >= 3)
1341             && !strcmp(leaf + len - 3, "csh"))
1342             p = "set noglob;\nsetenv TERM %s;\nunset noglob;\n";
1343         else
1344             p = "TERM=%s;\n";
1345         (void) printf(p, ttype);
1346     }
1347
1348     ExitProgram(EXIT_SUCCESS);
1349 }