system_cmds/getty.tproj/subr.c

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)from: subr.c        8.1 (Berkeley) 6/4/93";
  39 #endif
  40 __unused static const char rcsid[] =
  41   "$FreeBSD: src/libexec/getty/subr.c,v 1.19 2004/06/25 10:11:28 phk Exp $";
  42 #endif /* not lint */
  43
  44 /*
  45  * Melbourne getty.
  46  */
  47 #ifdef DEBUG
  48 #include <stdio.h>
  49 #endif
  50 #include <stdlib.h>
  51 #include <string.h>
  52 #include <termios.h>
  53 #include <unistd.h>
  54 #include <sys/ioctl.h>
  55 #include <sys/param.h>
  56 #include <sys/time.h>
  57 #include <syslog.h>
  58
  59 #include "gettytab.h"
  60 #include "pathnames.h"
  61 #include "extern.h"
  62
  63 /*
  64  * Get a table entry.
  65  */
  66 void
  67 gettable(const char *name)
  68 {
  69         char *buf = NULL;
  70         struct gettystrs *sp;
  71         struct gettynums *np;
  72         struct gettyflags *fp;
  73         long n;
  74         int l;
  75         char *p;
  76         char *msg = NULL;
  77         const char *dba[2];
  78
  79         static int firsttime = 1;
  80
  81         dba[0] = _PATH_GETTYTAB;
  82         dba[1] = 0;
  83
  84         if (firsttime) {
  85                 /*
  86                  * we need to strdup() anything in the strings array
  87                  * initially in order to simplify things later
  88                  */
  89                 for (sp = gettystrs; sp->field; sp++)
  90                         if (sp->value != NULL) {
  91                                 /* handle these ones more carefully */
  92                                 if (sp >= &gettystrs[4] && sp <= &gettystrs[6])
  93                                         l = 2;
  94                                 else
  95                                         l = (int)strlen(sp->value) + 1;
  96                                 if ((p = malloc(l)) != NULL) {
  97                                         strncpy(p, sp->value, l);
  98                                         p[l-1] = '\0';
  99                                 }
 100                                 /*
 101                                  * replace, even if NULL, else we'll
 102                                  * have problems with free()ing static mem
 103                                  */
 104                                 sp->value = p;
 105                         }
 106                 firsttime = 0;
 107         }
 108
 109         switch (cgetent(&buf, (char **)dba, (char *)name)) {
 110         case 1:
 111                 msg = "%s: couldn't resolve 'tc=' in gettytab '%s'";
 112         case 0:
 113                 break;
 114         case -1:
 115                 msg = "%s: unknown gettytab entry '%s'";
 116                 break;
 117         case -2:
 118                 msg = "%s: retrieving gettytab entry '%s': %m";
 119                 break;
 120         case -3:
 121                 msg = "%s: recursive 'tc=' reference gettytab entry '%s'";
 122                 break;
 123         default:
 124                 msg = "%s: unexpected cgetent() error for entry '%s'";
 125                 break;
 126         }
 127
 128         if (msg != NULL) {
 129                 syslog(LOG_ERR, msg, "getty", name);
 130                 return;
 131         }
 132
 133         for (sp = gettystrs; sp->field; sp++) {
 134                 if ((l = cgetstr(buf, (char*)sp->field, &p)) >= 0) {
 135                         if (sp->value) {
 136                                 /* prefer existing value */
 137                                 if (strcmp(p, sp->value) != 0)
 138                                         free(sp->value);
 139                                 else {
 140                                         free(p);
 141                                         p = sp->value;
 142                                 }
 143                         }
 144                         sp->value = p;
 145                 } else if (l == -1) {
 146                         free(sp->value);
 147                         sp->value = NULL;
 148                 }
 149         }
 150
 151         for (np = gettynums; np->field; np++) {
 152                 if (cgetnum(buf, (char*)np->field, &n) == -1)
 153                         np->set = 0;
 154                 else {
 155                         np->set = 1;
 156                         np->value = n;
 157                 }
 158         }
 159
 160         for (fp = gettyflags; fp->field; fp++) {
 161                 if (cgetcap(buf, (char *)fp->field, ':') == NULL)
 162                         fp->set = 0;
 163                 else {
 164                         fp->set = 1;
 165                         fp->value = 1 ^ fp->invrt;
 166                 }
 167         }
 168
 169 #ifdef DEBUG
 170         printf("name=\"%s\", buf=\"%s\"\r\n", name, buf);
 171         for (sp = gettystrs; sp->field; sp++)
 172                 printf("cgetstr: %s=%s\r\n", sp->field, sp->value);
 173         for (np = gettynums; np->field; np++)
 174                 printf("cgetnum: %s=%d\r\n", np->field, np->value);
 175         for (fp = gettyflags; fp->field; fp++)
 176                 printf("cgetflags: %s='%c' set='%c'\r\n", fp->field,
 177                        fp->value + '0', fp->set + '0');
 178 #endif /* DEBUG */
 179
 180         free(buf);
 181 }
 182
 183 void
 184 gendefaults(void)
 185 {
 186         struct gettystrs *sp;
 187         struct gettynums *np;
 188         struct gettyflags *fp;
 189
 190         for (sp = gettystrs; sp->field; sp++)
 191                 if (sp->value)
 192                         sp->defalt = strdup(sp->value);
 193         for (np = gettynums; np->field; np++)
 194                 if (np->set)
 195                         np->defalt = np->value;
 196         for (fp = gettyflags; fp->field; fp++)
 197                 if (fp->set)
 198                         fp->defalt = fp->value;
 199                 else
 200                         fp->defalt = fp->invrt;
 201 }
 202
 203 void
 204 setdefaults(void)
 205 {
 206         struct gettystrs *sp;
 207         struct gettynums *np;
 208         struct gettyflags *fp;
 209
 210         for (sp = gettystrs; sp->field; sp++)
 211                 if (!sp->value)
 212                         sp->value = !sp->defalt ? sp->defalt
 213                                                 : strdup(sp->defalt);
 214         for (np = gettynums; np->field; np++)
 215                 if (!np->set)
 216                         np->value = np->defalt;
 217         for (fp = gettyflags; fp->field; fp++)
 218                 if (!fp->set)
 219                         fp->value = fp->defalt;
 220 }
 221
 222 static char **
 223 charnames[] = {
 224         &ER, &KL, &IN, &QU, &XN, &XF, &ET, &BK,
 225         &SU, &DS, &RP, &FL, &WE, &LN, 0
 226 };
 227
 228 static char *
 229 charvars[] = {
 230         (char*)&tmode.c_cc[VERASE],
 231         (char*)&tmode.c_cc[VKILL],
 232         (char*)&tmode.c_cc[VINTR],
 233         (char*)&tmode.c_cc[VQUIT],
 234         (char*)&tmode.c_cc[VSTART],
 235         (char*)&tmode.c_cc[VSTOP],
 236         (char*)&tmode.c_cc[VEOF],
 237         (char*)&tmode.c_cc[VEOL],
 238         (char*)&tmode.c_cc[VSUSP],
 239         (char*)&tmode.c_cc[VDSUSP],
 240         (char*)&tmode.c_cc[VREPRINT],
 241         (char*)&tmode.c_cc[VDISCARD],
 242         (char*)&tmode.c_cc[VWERASE],
 243         (char*)&tmode.c_cc[VLNEXT],
 244         0
 245 };
 246
 247 void
 248 setchars(void)
 249 {
 250         int i;
 251         const char *p;
 252
 253         for (i = 0; charnames[i]; i++) {
 254                 p = *charnames[i];
 255                 if (p && *p)
 256                         *charvars[i] = *p;
 257                 else
 258                         *charvars[i] = _POSIX_VDISABLE;
 259         }
 260 }
 261
 262 /* Macros to clear/set/test flags. */
 263 #define SET(t, f)       (t) |= (f)
 264 #define CLR(t, f)       (t) &= ~(f)
 265 #define ISSET(t, f)     ((t) & (f))
 266
 267 void
 268 set_flags(int n)
 269 {
 270         tcflag_t iflag, oflag, cflag, lflag;
 271
 272
 273         switch (n) {
 274         case 0:
 275                 if (C0set && I0set && L0set && O0set) {
 276                         tmode.c_cflag = C0;
 277                         tmode.c_iflag = I0;
 278                         tmode.c_lflag = L0;
 279                         tmode.c_oflag = O0;
 280                         return;
 281                 }
 282                 break;
 283         case 1:
 284                 if (C1set && I1set && L1set && O1set) {
 285                         tmode.c_cflag = C1;
 286                         tmode.c_iflag = I1;
 287                         tmode.c_lflag = L1;
 288                         tmode.c_oflag = O1;
 289                         return;
 290                 }
 291                 break;
 292         default:
 293                 if (C2set && I2set && L2set && O2set) {
 294                         tmode.c_cflag = C2;
 295                         tmode.c_iflag = I2;
 296                         tmode.c_lflag = L2;
 297                         tmode.c_oflag = O2;
 298                         return;
 299                 }
 300                 break;
 301         }
 302
 303         iflag = omode.c_iflag;
 304         oflag = omode.c_oflag;
 305         cflag = omode.c_cflag;
 306         lflag = omode.c_lflag;
 307
 308         if (NP) {
 309                 CLR(cflag, CSIZE|PARENB);
 310                 SET(cflag, CS8);
 311                 CLR(iflag, ISTRIP|INPCK|IGNPAR);
 312         } else if (AP || EP || OP) {
 313                 CLR(cflag, CSIZE);
 314                 SET(cflag, CS7|PARENB);
 315                 SET(iflag, ISTRIP);
 316                 if (OP && !EP) {
 317                         SET(iflag, INPCK|IGNPAR);
 318                         SET(cflag, PARODD);
 319                         if (AP)
 320                                 CLR(iflag, INPCK);
 321                 } else if (EP && !OP) {
 322                         SET(iflag, INPCK|IGNPAR);
 323                         CLR(cflag, PARODD);
 324                         if (AP)
 325                                 CLR(iflag, INPCK);
 326                 } else if (AP || (EP && OP)) {
 327                         CLR(iflag, INPCK|IGNPAR);
 328                         CLR(cflag, PARODD);
 329                 }
 330         } /* else, leave as is */
 331
 332 #if 0
 333         if (UC)
 334                 f |= LCASE;
 335 #endif
 336
 337         if (HC)
 338                 SET(cflag, HUPCL);
 339         else
 340                 CLR(cflag, HUPCL);
 341
 342         if (MB)
 343                 SET(cflag, MDMBUF);
 344         else
 345                 CLR(cflag, MDMBUF);
 346
 347         if (HW)
 348                 SET(cflag, CRTSCTS);
 349         else
 350                 CLR(cflag, CRTSCTS);
 351
 352         if (NL) {
 353                 SET(iflag, ICRNL);
 354                 SET(oflag, ONLCR|OPOST);
 355         } else {
 356                 CLR(iflag, ICRNL);
 357                 CLR(oflag, ONLCR);
 358         }
 359
 360         if (!HT)
 361                 SET(oflag, OXTABS|OPOST);
 362         else
 363                 CLR(oflag, OXTABS);
 364
 365 #ifdef XXX_DELAY
 366         SET(f, delaybits());
 367 #endif
 368
 369         if (n == 1) {           /* read mode flags */
 370                 if (RW) {
 371                         iflag = 0;
 372                         CLR(oflag, OPOST);
 373                         CLR(cflag, CSIZE|PARENB);
 374                         SET(cflag, CS8);
 375                         lflag = 0;
 376                 } else {
 377                         CLR(lflag, ICANON);
 378                 }
 379                 goto out;
 380         }
 381
 382         if (n == 0)
 383                 goto out;
 384
 385 #if 0
 386         if (CB)
 387                 SET(f, CRTBS);
 388 #endif
 389
 390         if (CE)
 391                 SET(lflag, ECHOE);
 392         else
 393                 CLR(lflag, ECHOE);
 394
 395         if (CK)
 396                 SET(lflag, ECHOKE);
 397         else
 398                 CLR(lflag, ECHOKE);
 399
 400         if (PE)
 401                 SET(lflag, ECHOPRT);
 402         else
 403                 CLR(lflag, ECHOPRT);
 404
 405         if (EC)
 406                 SET(lflag, ECHO);
 407         else
 408                 CLR(lflag, ECHO);
 409
 410         if (XC)
 411                 SET(lflag, ECHOCTL);
 412         else
 413                 CLR(lflag, ECHOCTL);
 414
 415         if (DX)
 416                 SET(lflag, IXANY);
 417         else
 418                 CLR(lflag, IXANY);
 419
 420 out:
 421         tmode.c_iflag = iflag;
 422         tmode.c_oflag = oflag;
 423         tmode.c_cflag = cflag;
 424         tmode.c_lflag = lflag;
 425 }
 426
 427
 428 #ifdef XXX_DELAY
 429 struct delayval {
 430         unsigned        delay;          /* delay in ms */
 431         int             bits;
 432 };
 433
 434 /*
 435  * below are random guesses, I can't be bothered checking
 436  */
 437
 438 struct delayval crdelay[] = {
 439         { 1,            CR1 },
 440         { 2,            CR2 },
 441         { 3,            CR3 },
 442         { 83,           CR1 },
 443         { 166,          CR2 },
 444         { 0,            CR3 },
 445 };
 446
 447 struct delayval nldelay[] = {
 448         { 1,            NL1 },          /* special, calculated */
 449         { 2,            NL2 },
 450         { 3,            NL3 },
 451         { 100,          NL2 },
 452         { 0,            NL3 },
 453 };
 454
 455 struct delayval bsdelay[] = {
 456         { 1,            BS1 },
 457         { 0,            0 },
 458 };
 459
 460 struct delayval ffdelay[] = {
 461         { 1,            FF1 },
 462         { 1750,         FF1 },
 463         { 0,            FF1 },
 464 };
 465
 466 struct delayval tbdelay[] = {
 467         { 1,            TAB1 },
 468         { 2,            TAB2 },
 469         { 3,            XTABS },        /* this is expand tabs */
 470         { 100,          TAB1 },
 471         { 0,            TAB2 },
 472 };
 473
 474 int
 475 delaybits(void)
 476 {
 477         int f;
 478
 479         f  = adelay(CD, crdelay);
 480         f |= adelay(ND, nldelay);
 481         f |= adelay(FD, ffdelay);
 482         f |= adelay(TD, tbdelay);
 483         f |= adelay(BD, bsdelay);
 484         return (f);
 485 }
 486
 487 int
 488 adelay(int ms, struct delayval *dp)
 489 {
 490         if (ms == 0)
 491                 return (0);
 492         while (dp->delay && ms > dp->delay)
 493                 dp++;
 494         return (dp->bits);
 495 }
 496 #endif
 497
 498 char    editedhost[MAXHOSTNAMELEN];
 499
 500 void
 501 edithost(const char *pat)
 502 {
 503         const char *host = HN;
 504         char *res = editedhost;
 505
 506         if (!pat)
 507                 pat = "";
 508         while (*pat) {
 509                 switch (*pat) {
 510
 511                 case '#':
 512                         if (*host)
 513                                 host++;
 514                         break;
 515
 516                 case '@':
 517                         if (*host)
 518                                 *res++ = *host++;
 519                         break;
 520
 521                 default:
 522                         *res++ = *pat;
 523                         break;
 524
 525                 }
 526                 if (res == &editedhost[sizeof editedhost - 1]) {
 527                         *res = '\0';
 528                         return;
 529                 }
 530                 pat++;
 531         }
 532         if (*host)
 533                 strncpy(res, host, sizeof editedhost - (res - editedhost) - 1);
 534         else
 535                 *res = '\0';
 536         editedhost[sizeof editedhost - 1] = '\0';
 537 }
 538
 539 static struct speedtab {
 540         int     speed;
 541         int     uxname;
 542 } speedtab[] = {
 543         { 50,   B50 },
 544         { 75,   B75 },
 545         { 110,  B110 },
 546         { 134,  B134 },
 547         { 150,  B150 },
 548         { 200,  B200 },
 549         { 300,  B300 },
 550         { 600,  B600 },
 551         { 1200, B1200 },
 552         { 1800, B1800 },
 553         { 2400, B2400 },
 554         { 4800, B4800 },
 555         { 9600, B9600 },
 556         { 19200, EXTA },
 557         { 19,   EXTA },         /* for people who say 19.2K */
 558         { 38400, EXTB },
 559         { 38,   EXTB },
 560         { 7200, EXTB },         /* alternative */
 561         { 57600, B57600 },
 562         { 115200, B115200 },
 563         { 230400, B230400 },
 564         { 0 }
 565 };
 566
 567 int
 568 speed(int val)
 569 {
 570         struct speedtab *sp;
 571
 572         if (val <= B230400)
 573                 return (val);
 574
 575         for (sp = speedtab; sp->speed; sp++)
 576                 if (sp->speed == val)
 577                         return (sp->uxname);
 578
 579         return (B300);          /* default in impossible cases */
 580 }
 581
 582 void
 583 makeenv(char *env[])
 584 {
 585         static char termbuf[128] = "TERM=";
 586         char *p, *q;
 587         char **ep;
 588
 589         ep = env;
 590         if (TT && *TT) {
 591                 strlcat(termbuf, TT, sizeof(termbuf));
 592                 *ep++ = termbuf;
 593         }
 594         if ((p = EV)) {
 595                 q = p;
 596                 while ((q = strchr(q, ','))) {
 597                         *q++ = '\0';
 598                         *ep++ = p;
 599                         p = q;
 600                 }
 601                 if (*p)
 602                         *ep++ = p;
 603         }
 604         *ep = (char *)0;
 605 }
 606
 607 /*
 608  * This speed select mechanism is written for the Develcon DATASWITCH.
 609  * The Develcon sends a string of the form "B{speed}\n" at a predefined
 610  * baud rate. This string indicates the user's actual speed.
 611  * The routine below returns the terminal type mapped from derived speed.
 612  */
 613 struct  portselect {
 614         const char      *ps_baud;
 615         const char      *ps_type;
 616 } portspeeds[] = {
 617         { "B110",       "std.110" },
 618         { "B134",       "std.134" },
 619         { "B150",       "std.150" },
 620         { "B300",       "std.300" },
 621         { "B600",       "std.600" },
 622         { "B1200",      "std.1200" },
 623         { "B2400",      "std.2400" },
 624         { "B4800",      "std.4800" },
 625         { "B9600",      "std.9600" },
 626         { "B19200",     "std.19200" },
 627         { 0 }
 628 };
 629
 630 const char *
 631 portselector(void)
 632 {
 633         char c, baud[20];
 634         const char *type = "default";
 635         struct portselect *ps;
 636         int len;
 637
 638         alarm(5*60);
 639         for (len = 0; len < sizeof (baud) - 1; len++) {
 640                 if (read(STDIN_FILENO, &c, 1) <= 0)
 641                         break;
 642                 c &= 0177;
 643                 if (c == '\n' || c == '\r')
 644                         break;
 645                 if (c == 'B')
 646                         len = 0;        /* in case of leading garbage */
 647                 baud[len] = c;
 648         }
 649         baud[len] = '\0';
 650         for (ps = portspeeds; ps->ps_baud; ps++)
 651                 if (strcmp(ps->ps_baud, baud) == 0) {
 652                         type = ps->ps_type;
 653                         break;
 654                 }
 655         sleep(2);       /* wait for connection to complete */
 656         return (type);
 657 }
 658
 659 /*
 660  * This auto-baud speed select mechanism is written for the Micom 600
 661  * portselector. Selection is done by looking at how the character '\r'
 662  * is garbled at the different speeds.
 663  */
 664 const char *
 665 autobaud(void)
 666 {
 667         int rfds;
 668         struct timeval timeout;
 669         char c;
 670         const char *type = "9600-baud";
 671
 672         (void)tcflush(0, TCIOFLUSH);
 673         rfds = 1 << 0;
 674         timeout.tv_sec = 5;
 675         timeout.tv_usec = 0;
 676         if (select(32, (fd_set *)&rfds, (fd_set *)NULL,
 677             (fd_set *)NULL, &timeout) <= 0)
 678                 return (type);
 679         if (read(STDIN_FILENO, &c, sizeof(char)) != sizeof(char))
 680                 return (type);
 681         timeout.tv_sec = 0;
 682         timeout.tv_usec = 20;
 683         (void) select(32, (fd_set *)NULL, (fd_set *)NULL,
 684             (fd_set *)NULL, &timeout);
 685         (void)tcflush(0, TCIOFLUSH);
 686         switch (c & 0377) {
 687
 688         case 0200:              /* 300-baud */
 689                 type = "300-baud";
 690                 break;
 691
 692         case 0346:              /* 1200-baud */
 693                 type = "1200-baud";
 694                 break;
 695
 696         case  015:              /* 2400-baud */
 697         case 0215:
 698                 type = "2400-baud";
 699                 break;
 700
 701         default:                /* 4800-baud */
 702                 type = "4800-baud";
 703                 break;
 704
 705         case 0377:              /* 9600-baud */
 706                 type = "9600-baud";
 707                 break;
 708         }
 709         return (type);
 710 }