1 /* 2 * Copyright (c) 1980 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 */ 6 7 #ifndef lint 8 char copyright[] = 9 "@(#) Copyright (c) 1980 Regents of the University of California.\n\ 10 All rights reserved.\n"; 11 #endif not lint 12 13 #ifndef lint 14 static char sccsid[] = "@(#)main.c 5.5 (Berkeley) 01/23/86"; 15 #endif not lint 16 17 /* 18 * getty -- adapt to terminal speed on dialup, and call login 19 * 20 * Melbourne getty, June 83, kre. 21 */ 22 23 #include <sgtty.h> 24 #include <signal.h> 25 #include <ctype.h> 26 #include <setjmp.h> 27 #include <syslog.h> 28 #include <sys/file.h> 29 #include "gettytab.h" 30 31 extern char **environ; 32 33 struct sgttyb tmode = { 34 0, 0, CERASE, CKILL, 0 35 }; 36 struct tchars tc = { 37 CINTR, CQUIT, CSTART, 38 CSTOP, CEOF, CBRK, 39 }; 40 struct ltchars ltc = { 41 CSUSP, CDSUSP, CRPRNT, 42 CFLUSH, CWERASE, CLNEXT 43 }; 44 45 int crmod; 46 int upper; 47 int lower; 48 int digit; 49 50 char hostname[32]; 51 char name[16]; 52 char dev[] = "/dev/"; 53 char ctty[] = "/dev/console"; 54 char ttyn[32]; 55 char *portselector(); 56 char *ttyname(); 57 58 #define OBUFSIZ 128 59 #define TABBUFSIZ 512 60 61 char defent[TABBUFSIZ]; 62 char defstrs[TABBUFSIZ]; 63 char tabent[TABBUFSIZ]; 64 char tabstrs[TABBUFSIZ]; 65 66 char *env[128]; 67 68 char partab[] = { 69 0001,0201,0201,0001,0201,0001,0001,0201, 70 0202,0004,0003,0205,0005,0206,0201,0001, 71 0201,0001,0001,0201,0001,0201,0201,0001, 72 0001,0201,0201,0001,0201,0001,0001,0201, 73 0200,0000,0000,0200,0000,0200,0200,0000, 74 0000,0200,0200,0000,0200,0000,0000,0200, 75 0000,0200,0200,0000,0200,0000,0000,0200, 76 0200,0000,0000,0200,0000,0200,0200,0000, 77 0200,0000,0000,0200,0000,0200,0200,0000, 78 0000,0200,0200,0000,0200,0000,0000,0200, 79 0000,0200,0200,0000,0200,0000,0000,0200, 80 0200,0000,0000,0200,0000,0200,0200,0000, 81 0000,0200,0200,0000,0200,0000,0000,0200, 82 0200,0000,0000,0200,0000,0200,0200,0000, 83 0200,0000,0000,0200,0000,0200,0200,0000, 84 0000,0200,0200,0000,0200,0000,0000,0201 85 }; 86 87 #define ERASE tmode.sg_erase 88 #define KILL tmode.sg_kill 89 #define EOT tc.t_eofc 90 91 jmp_buf timeout; 92 93 dingdong() 94 { 95 96 alarm(0); 97 signal(SIGALRM, SIG_DFL); 98 longjmp(timeout, 1); 99 } 100 101 jmp_buf intrupt; 102 103 interrupt() 104 { 105 106 signal(SIGINT, interrupt); 107 longjmp(intrupt, 1); 108 } 109 110 main(argc, argv) 111 char *argv[]; 112 { 113 char *tname; 114 long allflags; 115 int repcnt = 0; 116 117 signal(SIGINT, SIG_IGN); 118 /* 119 signal(SIGQUIT, SIG_DFL); 120 */ 121 openlog("getty", LOG_ODELAY|LOG_CONS, LOG_AUTH); 122 gethostname(hostname, sizeof(hostname)); 123 if (hostname[0] == '\0') 124 strcpy(hostname, "Amnesiac"); 125 /* 126 * The following is a work around for vhangup interactions 127 * which cause great problems getting window systems started. 128 * If the tty line is "-", we do the old style getty presuming 129 * that the file descriptors are already set up for us. 130 * J. Gettys - MIT Project Athena. 131 */ 132 if (argc <= 2 || strcmp(argv[2], "-") == 0) 133 strcpy(ttyn, ttyname(0)); 134 else { 135 strcpy(ttyn, dev); 136 strncat(ttyn, argv[2], sizeof(ttyn)-sizeof(dev)); 137 if (strcmp(argv[0], "+") != 0) { 138 chown(ttyn, 0, 0); 139 chmod(ttyn, 0622); 140 /* 141 * Delay the open so DTR stays down long enough to be detected. 142 */ 143 sleep(2); 144 while (open(ttyn, O_RDWR) != 0) { 145 if (repcnt % 10 == 0) { 146 syslog(LOG_ERR, "%s: %m", ttyn); 147 closelog(); 148 } 149 repcnt++; 150 sleep(60); 151 } 152 signal(SIGHUP, SIG_IGN); 153 vhangup(); 154 (void) open(ttyn, O_RDWR); 155 close(0); 156 dup(1); 157 dup(0); 158 signal(SIGHUP, SIG_DFL); 159 } 160 } 161 162 gettable("default", defent, defstrs); 163 gendefaults(); 164 tname = "default"; 165 if (argc > 1) 166 tname = argv[1]; 167 for (;;) { 168 int ldisp = OTTYDISC; 169 170 gettable(tname, tabent, tabstrs); 171 if (OPset || EPset || APset) 172 APset++, OPset++, EPset++; 173 setdefaults(); 174 ioctl(0, TIOCFLUSH, 0); /* clear out the crap */ 175 if (IS) 176 tmode.sg_ispeed = speed(IS); 177 else if (SP) 178 tmode.sg_ispeed = speed(SP); 179 if (OS) 180 tmode.sg_ospeed = speed(OS); 181 else if (SP) 182 tmode.sg_ospeed = speed(SP); 183 tmode.sg_flags = setflags(0); 184 ioctl(0, TIOCSETP, &tmode); 185 setchars(); 186 ioctl(0, TIOCSETC, &tc); 187 ioctl(0, TIOCSETD, &ldisp); 188 if (HC) 189 ioctl(0, TIOCHPCL, 0); 190 if (AB) { 191 extern char *autobaud(); 192 193 tname = autobaud(); 194 continue; 195 } 196 if (PS) { 197 tname = portselector(); 198 continue; 199 } 200 if (CL && *CL) 201 putpad(CL); 202 edithost(HE); 203 if (IM && *IM) 204 putf(IM); 205 if (setjmp(timeout)) { 206 tmode.sg_ispeed = tmode.sg_ospeed = 0; 207 ioctl(0, TIOCSETP, &tmode); 208 exit(1); 209 } 210 if (TO) { 211 signal(SIGALRM, dingdong); 212 alarm(TO); 213 } 214 if (getname()) { 215 register int i; 216 217 oflush(); 218 alarm(0); 219 signal(SIGALRM, SIG_DFL); 220 if (!(upper || lower || digit)) 221 continue; 222 allflags = setflags(2); 223 tmode.sg_flags = allflags & 0xffff; 224 allflags >>= 16; 225 if (crmod || NL) 226 tmode.sg_flags |= CRMOD; 227 if (upper || UC) 228 tmode.sg_flags |= LCASE; 229 if (lower || LC) 230 tmode.sg_flags &= ~LCASE; 231 ioctl(0, TIOCSETP, &tmode); 232 ioctl(0, TIOCSLTC, <c); 233 ioctl(0, TIOCLSET, &allflags); 234 signal(SIGINT, SIG_DFL); 235 for (i = 0; environ[i] != (char *)0; i++) 236 env[i] = environ[i]; 237 makeenv(&env[i]); 238 execle(LO, "login", "-p", name, (char *) 0, env); 239 exit(1); 240 } 241 alarm(0); 242 signal(SIGALRM, SIG_DFL); 243 signal(SIGINT, SIG_IGN); 244 if (NX && *NX) 245 tname = NX; 246 } 247 } 248 249 getname() 250 { 251 register char *np; 252 register c; 253 char cs; 254 255 /* 256 * Interrupt may happen if we use CBREAK mode 257 */ 258 if (setjmp(intrupt)) { 259 signal(SIGINT, SIG_IGN); 260 return (0); 261 } 262 signal(SIGINT, interrupt); 263 tmode.sg_flags = setflags(0); 264 ioctl(0, TIOCSETP, &tmode); 265 tmode.sg_flags = setflags(1); 266 prompt(); 267 if (PF > 0) { 268 oflush(); 269 sleep(PF); 270 PF = 0; 271 } 272 ioctl(0, TIOCSETP, &tmode); 273 crmod = 0; 274 upper = 0; 275 lower = 0; 276 digit = 0; 277 np = name; 278 for (;;) { 279 oflush(); 280 if (read(0, &cs, 1) <= 0) 281 exit(0); 282 if ((c = cs&0177) == 0) 283 return (0); 284 if (c == EOT) 285 exit(1); 286 if (c == '\r' || c == '\n' || np >= &name[sizeof name]) { 287 putf("\r\n"); 288 break; 289 } 290 if (c >= 'a' && c <= 'z') 291 lower++; 292 else if (c >= 'A' && c <= 'Z') 293 upper++; 294 else if (c == ERASE || c == '#' || c == '\b') { 295 if (np > name) { 296 np--; 297 if (tmode.sg_ospeed >= B1200) 298 puts("\b \b"); 299 else 300 putchr(cs); 301 } 302 continue; 303 } else if (c == KILL || c == '@') { 304 putchr(cs); 305 putchr('\r'); 306 if (tmode.sg_ospeed < B1200) 307 putchr('\n'); 308 /* this is the way they do it down under ... */ 309 else if (np > name) 310 puts(" \r"); 311 prompt(); 312 np = name; 313 continue; 314 } else if (c >= '0' && c <= '9') 315 digit++; 316 if (IG && (c <= ' ' || c > 0176)) 317 continue; 318 *np++ = c; 319 putchr(cs); 320 } 321 signal(SIGINT, SIG_IGN); 322 *np = 0; 323 if (c == '\r') 324 crmod++; 325 if (upper && !lower && !LC || UC) 326 for (np = name; *np; np++) 327 if (isupper(*np)) 328 *np = tolower(*np); 329 return (1); 330 } 331 332 static 333 short tmspc10[] = { 334 0, 2000, 1333, 909, 743, 666, 500, 333, 166, 83, 55, 41, 20, 10, 5, 15 335 }; 336 337 putpad(s) 338 register char *s; 339 { 340 register pad = 0; 341 register mspc10; 342 343 if (isdigit(*s)) { 344 while (isdigit(*s)) { 345 pad *= 10; 346 pad += *s++ - '0'; 347 } 348 pad *= 10; 349 if (*s == '.' && isdigit(s[1])) { 350 pad += s[1] - '0'; 351 s += 2; 352 } 353 } 354 355 puts(s); 356 /* 357 * If no delay needed, or output speed is 358 * not comprehensible, then don't try to delay. 359 */ 360 if (pad == 0) 361 return; 362 if (tmode.sg_ospeed <= 0 || 363 tmode.sg_ospeed >= (sizeof tmspc10 / sizeof tmspc10[0])) 364 return; 365 366 /* 367 * Round up by a half a character frame, 368 * and then do the delay. 369 * Too bad there are no user program accessible programmed delays. 370 * Transmitting pad characters slows many 371 * terminals down and also loads the system. 372 */ 373 mspc10 = tmspc10[tmode.sg_ospeed]; 374 pad += mspc10 / 2; 375 for (pad /= mspc10; pad > 0; pad--) 376 putchr(*PC); 377 } 378 379 puts(s) 380 register char *s; 381 { 382 383 while (*s) 384 putchr(*s++); 385 } 386 387 char outbuf[OBUFSIZ]; 388 int obufcnt = 0; 389 390 putchr(cc) 391 { 392 char c; 393 394 c = cc; 395 c |= partab[c&0177] & 0200; 396 if (OP) 397 c ^= 0200; 398 if (!UB) { 399 outbuf[obufcnt++] = c; 400 if (obufcnt >= OBUFSIZ) 401 oflush(); 402 } else 403 write(1, &c, 1); 404 } 405 406 oflush() 407 { 408 if (obufcnt) 409 write(1, outbuf, obufcnt); 410 obufcnt = 0; 411 } 412 413 prompt() 414 { 415 416 putf(LM); 417 if (CO) 418 putchr('\n'); 419 } 420 421 putf(cp) 422 register char *cp; 423 { 424 char *ttyn, *slash; 425 char datebuffer[60]; 426 extern char editedhost[]; 427 extern char *ttyname(), *rindex(); 428 429 while (*cp) { 430 if (*cp != '%') { 431 putchr(*cp++); 432 continue; 433 } 434 switch (*++cp) { 435 436 case 't': 437 ttyn = ttyname(0); 438 slash = rindex(ttyn, '/'); 439 if (slash == (char *) 0) 440 puts(ttyn); 441 else 442 puts(&slash[1]); 443 break; 444 445 case 'h': 446 puts(editedhost); 447 break; 448 449 case 'd': 450 get_date(datebuffer); 451 puts(datebuffer); 452 break; 453 454 case '%': 455 putchr('%'); 456 break; 457 } 458 cp++; 459 } 460 } 461