getty.tproj/main.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*-
  25  * Copyright (c) 1980, 1993
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *      This product includes software developed by the University of
  39  *      California, Berkeley and its contributors.
  40  * 4. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  */
  56
  57 #ifndef lint
  58 static char copyright[] =
  59 "@(#) Copyright (c) 1980, 1993\n\
  60         The Regents of the University of California.  All rights reserved.\n";
  61 #endif /* not lint */
  62
  63 #ifndef lint
  64 /*static char sccsid[] = "from: @(#)main.c      8.1 (Berkeley) 6/20/93";*/
  65 static char rcsid[] = "$Id: main.c,v 1.3 2004/08/26 00:32:22 lindak Exp $";
  66 #endif /* not lint */
  67
  68 #include <sys/param.h>
  69 #include <sys/stat.h>
  70 #include <sys/termios.h>
  71 #include <sys/ioctl.h>
  72 #include <sys/resource.h>
  73 #include <sys/utsname.h>
  74 #include <signal.h>
  75 #include <fcntl.h>
  76 #include <time.h>
  77 #include <ctype.h>
  78 #include <fcntl.h>
  79 #include <setjmp.h>
  80 #include <signal.h>
  81 #include <stdlib.h>
  82 #include <string.h>
  83 #include <syslog.h>
  84 #include <time.h>
  85 #include <unistd.h>
  86
  87 #include "gettytab.h"
  88 #include "pathnames.h"
  89 #include "extern.h"
  90
  91 /*
  92  * Set the amount of running time that getty should accumulate
  93  * before deciding that something is wrong and exit.
  94  */
  95 #define GETTY_TIMEOUT   60 /* seconds */
  96
  97 struct termios tmode, omode;
  98
  99 int crmod, digit, lower, upper;
 100
 101 char    hostname[MAXHOSTNAMELEN];
 102 struct  utsname kerninfo;
 103 char    name[MAXLOGNAME+1];
 104 char    dev[] = _PATH_DEV;
 105 char    ttyn[32];
 106 char    *portselector();
 107 char    *ttyname();
 108
 109 #define OBUFSIZ         128
 110 #define TABBUFSIZ       512
 111
 112 char    defent[TABBUFSIZ];
 113 char    tabent[TABBUFSIZ];
 114
 115 char    *env[128];
 116
 117 char partab[] = {
 118         0001,0201,0201,0001,0201,0001,0001,0201,
 119         0202,0004,0003,0205,0005,0206,0201,0001,
 120         0201,0001,0001,0201,0001,0201,0201,0001,
 121         0001,0201,0201,0001,0201,0001,0001,0201,
 122         0200,0000,0000,0200,0000,0200,0200,0000,
 123         0000,0200,0200,0000,0200,0000,0000,0200,
 124         0000,0200,0200,0000,0200,0000,0000,0200,
 125         0200,0000,0000,0200,0000,0200,0200,0000,
 126         0200,0000,0000,0200,0000,0200,0200,0000,
 127         0000,0200,0200,0000,0200,0000,0000,0200,
 128         0000,0200,0200,0000,0200,0000,0000,0200,
 129         0200,0000,0000,0200,0000,0200,0200,0000,
 130         0000,0200,0200,0000,0200,0000,0000,0200,
 131         0200,0000,0000,0200,0000,0200,0200,0000,
 132         0200,0000,0000,0200,0000,0200,0200,0000,
 133         0000,0200,0200,0000,0200,0000,0000,0201
 134 };
 135
 136 #define ERASE   tmode.c_cc[VERASE]
 137 #define KILL    tmode.c_cc[VKILL]
 138 #define EOT     tmode.c_cc[VEOF]
 139
 140 jmp_buf timeout;
 141
 142 static void
 143 dingdong()
 144 {
 145
 146         alarm(0);
 147         signal(SIGALRM, SIG_DFL);
 148         longjmp(timeout, 1);
 149 }
 150
 151 jmp_buf intrupt;
 152
 153 static void
 154 interrupt()
 155 {
 156
 157         signal(SIGINT, interrupt);
 158         longjmp(intrupt, 1);
 159 }
 160
 161 /*
 162  * Action to take when getty is running too long.
 163  */
 164 void
 165 timeoverrun(signo)
 166         int signo;
 167 {
 168
 169         syslog(LOG_ERR, "getty exiting due to excessive running time\n");
 170         exit(1);
 171 }
 172
 173 static int      getname __P((void));
 174 static void     oflush __P((void));
 175 static void     prompt __P((void));
 176 static void     putchr __P((int));
 177 static void     putf __P((char *));
 178 static void     putpad __P((char *));
 179 static void     puts __P((char *));
 180
 181 int
 182 main(argc, argv)
 183         int argc;
 184         char *argv[];
 185 {
 186         extern char **environ;
 187         char *tname;
 188         long allflags;
 189         int repcnt = 0;
 190         struct rlimit limit;
 191         int ttyopenmode;
 192
 193         signal(SIGINT, SIG_IGN);
 194 /*
 195         signal(SIGQUIT, SIG_DFL);
 196 */
 197         openlog("getty", LOG_ODELAY|LOG_CONS, LOG_AUTH);
 198         gethostname(hostname, sizeof(hostname));
 199         if (hostname[0] == '\0')
 200                 strcpy(hostname, "Amnesiac");
 201         uname(&kerninfo);
 202
 203         /*
 204          * Limit running time to deal with broken or dead lines.
 205          */
 206         (void)signal(SIGXCPU, timeoverrun);
 207         limit.rlim_max = RLIM_INFINITY;
 208         limit.rlim_cur = GETTY_TIMEOUT;
 209         (void)setrlimit(RLIMIT_CPU, &limit);
 210
 211         /*
 212          * The following is a work around for vhangup interactions
 213          * which cause great problems getting window systems started.
 214          * If the tty line is "-", we do the old style getty presuming
 215          * that the file descriptors are already set up for us.
 216          * J. Gettys - MIT Project Athena.
 217          */
 218         if (argc <= 2 || strcmp(argv[2], "-") == 0)
 219             strcpy(ttyn, ttyname(0));
 220         else {
 221             int i;
 222
 223             strcpy(ttyn, dev);
 224             strncat(ttyn, argv[2], sizeof(ttyn)-sizeof(dev));
 225             if (strcmp(argv[0], "+") != 0) {
 226                 chown(ttyn, 0, 0);
 227                 chmod(ttyn, 0600);
 228                 revoke(ttyn);
 229                 /*
 230                  * Delay the open so DTR stays down long enough to be detected.
 231                  */
 232                 sleep(2);
 233 #ifdef __APPLE__
 234                 ttyopenmode = ((strcmp(ttyn, _PATH_CONSOLE)==0)
 235                         ? (O_RDWR |O_POPUP): O_RDWR);
 236 #else /* __APPLE __ */
 237                 ttyopenmode = O_RDWR;
 238 #endif /* __APPLE__ */
 239
 240                 while ((i = open(ttyn, ttyopenmode)) == -1) {
 241                         if (repcnt % 10 == 0) {
 242                                 syslog(LOG_ERR, "%s: %m", ttyn);
 243                                 closelog();
 244                         }
 245                         repcnt++;
 246                         sleep(60);
 247                 }
 248                 login_tty(i);
 249             }
 250         }
 251
 252         /* Start with default tty settings */
 253         if (tcgetattr(0, &tmode) < 0) {
 254                 syslog(LOG_ERR, "%s: %m", ttyn);
 255                 exit(1);
 256         }
 257         omode = tmode;
 258
 259         gettable("default", defent);
 260         gendefaults();
 261         tname = "default";
 262         if (argc > 1)
 263                 tname = argv[1];
 264         for (;;) {
 265                 int off;
 266
 267                 gettable(tname, tabent);
 268                 if (OPset || EPset || APset)
 269                         APset++, OPset++, EPset++;
 270                 setdefaults();
 271                 off = 0;
 272                 ioctl(0, TIOCFLUSH, &off);      /* clear out the crap */
 273                 ioctl(0, FIONBIO, &off);        /* turn off non-blocking mode */
 274                 ioctl(0, FIOASYNC, &off);       /* ditto for async mode */
 275
 276                 if (IS)
 277                         cfsetispeed(&tmode, IS);
 278                 else if (SP)
 279                         cfsetispeed(&tmode, SP);
 280                 if (OS)
 281                         cfsetospeed(&tmode, OS);
 282                 else if (SP)
 283                         cfsetospeed(&tmode, SP);
 284                 setflags(0);
 285                 setchars();
 286                 if (tcsetattr(0, TCSANOW, &tmode) < 0) {
 287                         syslog(LOG_ERR, "%s: %m", ttyn);
 288                         exit(1);
 289                 }
 290                 if (AB) {
 291                         extern char *autobaud();
 292
 293                         tname = autobaud();
 294                         continue;
 295                 }
 296                 if (PS) {
 297                         tname = portselector();
 298                         continue;
 299                 }
 300                 if (CL && *CL)
 301                         putpad(CL);
 302                 edithost(HE);
 303                 if (IM && *IM)
 304                         putf(IM);
 305                 if (setjmp(timeout)) {
 306                         tmode.c_ispeed = tmode.c_ospeed = 0;
 307                         (void)tcsetattr(0, TCSANOW, &tmode);
 308                         exit(1);
 309                 }
 310                 if (TO) {
 311                         signal(SIGALRM, dingdong);
 312                         alarm(TO);
 313                 }
 314                 if (getname()) {
 315                         register int i;
 316
 317                         oflush();
 318                         alarm(0);
 319                         signal(SIGALRM, SIG_DFL);
 320                         if (name[0] == '-') {
 321                                 puts("user names may not start with '-'.");
 322                                 continue;
 323                         }
 324                         if (!(upper || lower || digit))
 325                                 continue;
 326                         setflags(2);
 327                         if (crmod) {
 328                                 tmode.c_iflag |= ICRNL;
 329                                 tmode.c_oflag |= ONLCR;
 330                         }
 331 #if XXX
 332                         if (upper || UC)
 333                                 tmode.sg_flags |= LCASE;
 334                         if (lower || LC)
 335                                 tmode.sg_flags &= ~LCASE;
 336 #endif
 337                         if (tcsetattr(0, TCSANOW, &tmode) < 0) {
 338                                 syslog(LOG_ERR, "%s: %m", ttyn);
 339                                 exit(1);
 340                         }
 341                         signal(SIGINT, SIG_DFL);
 342                         for (i = 0; environ[i] != (char *)0; i++)
 343                                 env[i] = environ[i];
 344                         makeenv(&env[i]);
 345
 346                         limit.rlim_max = RLIM_INFINITY;
 347                         limit.rlim_cur = RLIM_INFINITY;
 348                         (void)setrlimit(RLIMIT_CPU, &limit);
 349                         execle(LO, "login", "-p1", name, (char *) 0, env);
 350                         syslog(LOG_ERR, "%s: %m", LO);
 351                         exit(1);
 352                 }
 353                 alarm(0);
 354                 signal(SIGALRM, SIG_DFL);
 355                 signal(SIGINT, SIG_IGN);
 356                 if (NX && *NX)
 357                         tname = NX;
 358         }
 359 }
 360
 361 static int
 362 getname()
 363 {
 364         register int c;
 365         register char *np;
 366         char cs;
 367
 368         /*
 369          * Interrupt may happen if we use CBREAK mode
 370          */
 371         if (setjmp(intrupt)) {
 372                 signal(SIGINT, SIG_IGN);
 373                 return (0);
 374         }
 375         signal(SIGINT, interrupt);
 376         setflags(1);
 377         prompt();
 378         if (PF > 0) {
 379                 oflush();
 380                 sleep(PF);
 381                 PF = 0;
 382         }
 383         if (tcsetattr(0, TCSANOW, &tmode) < 0) {
 384                 syslog(LOG_ERR, "%s: %m", ttyn);
 385                 exit(1);
 386         }
 387         crmod = digit = lower = upper = 0;
 388         np = name;
 389         for (;;) {
 390                 oflush();
 391                 if (read(STDIN_FILENO, &cs, 1) <= 0)
 392                         exit(0);
 393                 if ((c = cs&0177) == 0)
 394                         return (0);
 395                 if (c == EOT)
 396                         exit(1);
 397                 if (c == '\r' || c == '\n' || np >= &name[sizeof name-1]) {
 398                         putf("\r\n");
 399                         break;
 400                 }
 401                 if (islower(c))
 402                         lower = 1;
 403                 else if (isupper(c))
 404                         upper = 1;
 405                 else if (c == ERASE || c == '#' || c == '\b') {
 406                         if (np > name) {
 407                                 np--;
 408                                 if (cfgetospeed(&tmode) >= 1200)
 409                                         puts("\b \b");
 410                                 else
 411                                         putchr(cs);
 412                         }
 413                         continue;
 414                 } else if (c == KILL || c == '@') {
 415                         putchr(cs);
 416                         putchr('\r');
 417                         if (cfgetospeed(&tmode) < 1200)
 418                                 putchr('\n');
 419                         /* this is the way they do it down under ... */
 420                         else if (np > name)
 421                                 puts("                                     \r");
 422                         prompt();
 423                         np = name;
 424                         continue;
 425                 } else if (isdigit(c))
 426                         digit++;
 427                 if (IG && (c <= ' ' || c > 0176))
 428                         continue;
 429                 *np++ = c;
 430                 putchr(cs);
 431         }
 432         signal(SIGINT, SIG_IGN);
 433         *np = 0;
 434         if (c == '\r')
 435                 crmod = 1;
 436         if (upper && !lower && !LC || UC)
 437                 for (np = name; *np; np++)
 438                         if (isupper(*np))
 439                                 *np = tolower(*np);
 440         return (1);
 441 }
 442
 443 static void
 444 putpad(s)
 445         register char *s;
 446 {
 447         register pad = 0;
 448         speed_t ospeed = cfgetospeed(&tmode);
 449
 450         if (isdigit(*s)) {
 451                 while (isdigit(*s)) {
 452                         pad *= 10;
 453                         pad += *s++ - '0';
 454                 }
 455                 pad *= 10;
 456                 if (*s == '.' && isdigit(s[1])) {
 457                         pad += s[1] - '0';
 458                         s += 2;
 459                 }
 460         }
 461
 462         puts(s);
 463         /*
 464          * If no delay needed, or output speed is
 465          * not comprehensible, then don't try to delay.
 466          */
 467         if (pad == 0 || ospeed <= 0)
 468                 return;
 469
 470         /*
 471          * Round up by a half a character frame, and then do the delay.
 472          * Too bad there are no user program accessible programmed delays.
 473          * Transmitting pad characters slows many terminals down and also
 474          * loads the system.
 475          */
 476         pad = (pad * ospeed + 50000) / 100000;
 477         while (pad--)
 478                 putchr(*PC);
 479 }
 480
 481 static void
 482 puts(s)
 483         register char *s;
 484 {
 485         while (*s)
 486                 putchr(*s++);
 487 }
 488
 489 char    outbuf[OBUFSIZ];
 490 int     obufcnt = 0;
 491
 492 static void
 493 putchr(cc)
 494         int cc;
 495 {
 496         char c;
 497
 498         c = cc;
 499         if (!NP) {
 500                 c |= partab[c&0177] & 0200;
 501                 if (OP)
 502                         c ^= 0200;
 503         }
 504         if (!UB) {
 505                 outbuf[obufcnt++] = c;
 506                 if (obufcnt >= OBUFSIZ)
 507                         oflush();
 508         } else
 509                 write(STDOUT_FILENO, &c, 1);
 510 }
 511
 512 static void
 513 oflush()
 514 {
 515         if (obufcnt)
 516                 write(STDOUT_FILENO, outbuf, obufcnt);
 517         obufcnt = 0;
 518 }
 519
 520 static void
 521 prompt()
 522 {
 523
 524         putf(LM);
 525         if (CO)
 526                 putchr('\n');
 527 }
 528
 529 static void
 530 putf(cp)
 531         register char *cp;
 532 {
 533         extern char editedhost[];
 534         time_t t;
 535         char *slash, db[100];
 536
 537         while (*cp) {
 538                 if (*cp != '%') {
 539                         putchr(*cp++);
 540                         continue;
 541                 }
 542                 switch (*++cp) {
 543
 544                 case 't':
 545                         slash = strrchr(ttyn, '/');
 546                         if (slash == (char *) 0)
 547                                 puts(ttyn);
 548                         else
 549                                 puts(&slash[1]);
 550                         break;
 551
 552                 case 'h':
 553                         puts(editedhost);
 554                         break;
 555
 556                 case 'd': {
 557                         static char fmt[] = "%l:% %P on %A, %d %B %Y";
 558
 559                         fmt[4] = 'M';           /* I *hate* SCCS... */
 560                         (void)time(&t);
 561                         (void)strftime(db, sizeof(db), fmt, localtime(&t));
 562                         puts(db);
 563                         break;
 564
 565                 case 's':
 566                         puts(kerninfo.sysname);
 567                         break;
 568
 569                 case 'm':
 570                         puts(kerninfo.machine);
 571                         break;
 572
 573                 case 'r':
 574                         puts(kerninfo.release);
 575                         break;
 576
 577                 case 'v':
 578                         puts(kerninfo.version);
 579                         break;
 580                 }
 581
 582                 case '%':
 583                         putchr('%');
 584                         break;
 585                 }
 586                 cp++;
 587         }
 588 }