2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1980, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 static const char copyright[] =
34 "@(#) Copyright (c) 1980, 1993\n\
35 The Regents of the University of California. All rights reserved.\n";
40 static char sccsid[] = "@(#)from: main.c 8.1 (Berkeley) 6/20/93";
43 #include <sys/cdefs.h>
44 __FBSDID("$FreeBSD$");
46 #include <sys/param.h>
47 #include <sys/ioctl.h>
49 #include <sys/resource.h>
51 #include <sys/ttydefaults.h>
52 #include <sys/utsname.h>
70 #include "pathnames.h"
73 * Set the amount of running time that getty should accumulate
74 * before deciding that something is wrong and exit.
76 #define GETTY_TIMEOUT 60 /* seconds */
79 #define CTRL(x) (x&037)
81 /* defines for auto detection of incoming PPP calls (->PAP/CHAP) */
83 #define PPP_FRAME 0x7e /* PPP Framing character */
84 #define PPP_STATION 0xff /* "All Station" character */
85 #define PPP_ESCAPE 0x7d /* Escape Character */
86 #define PPP_CONTROL 0x03 /* PPP Control Field */
87 #define PPP_CONTROL_ESCAPED 0x23 /* PPP Control Field, escaped */
88 #define PPP_LCP_HI 0xc0 /* LCP protocol - high byte */
89 #define PPP_LCP_LOW 0x21 /* LCP protocol - low byte */
91 /* original mode; flags've been reset using values from <sys/ttydefaults.h> */
96 static int crmod, digit, lower, upper;
98 char hostname[MAXHOSTNAMELEN];
99 static char name[MAXLOGNAME*3];
100 static char dev[] = _PATH_DEV;
101 static char ttyn[32];
104 #define TABBUFSIZ 512
106 static char defent[TABBUFSIZ];
107 static char tabent[TABBUFSIZ];
108 static const char *tname;
110 static char *env[128];
112 static char partab[] = {
113 0001,0201,0201,0001,0201,0001,0001,0201,
114 0202,0004,0003,0205,0005,0206,0201,0001,
115 0201,0001,0001,0201,0001,0201,0201,0001,
116 0001,0201,0201,0001,0201,0001,0001,0201,
117 0200,0000,0000,0200,0000,0200,0200,0000,
118 0000,0200,0200,0000,0200,0000,0000,0200,
119 0000,0200,0200,0000,0200,0000,0000,0200,
120 0200,0000,0000,0200,0000,0200,0200,0000,
121 0200,0000,0000,0200,0000,0200,0200,0000,
122 0000,0200,0200,0000,0200,0000,0000,0200,
123 0000,0200,0200,0000,0200,0000,0000,0200,
124 0200,0000,0000,0200,0000,0200,0200,0000,
125 0000,0200,0200,0000,0200,0000,0000,0200,
126 0200,0000,0000,0200,0000,0200,0200,0000,
127 0200,0000,0000,0200,0000,0200,0200,0000,
128 0000,0200,0200,0000,0200,0000,0000,0201
131 #define ERASE tmode.c_cc[VERASE]
132 #define KILL tmode.c_cc[VKILL]
133 #define EOT tmode.c_cc[VEOF]
137 static void defttymode(void);
138 static void dingdong(int);
139 static void dogettytab(void);
140 static int getname(void);
141 static void interrupt(int);
142 static void oflush(void);
143 static void prompt(void);
144 static void putchr(int);
145 static void putf(const char *);
146 static void putpad(const char *);
147 static void puts(const char *);
148 static void timeoverrun(int);
149 static char *get_line(int);
150 static void setttymode(int);
151 static int opentty(const char *, int);
153 static jmp_buf timeout;
156 dingdong(int signo __unused)
162 static jmp_buf intrupt;
165 interrupt(int signo __unused)
171 * Action to take when getty is running too long.
174 timeoverrun(int signo __unused)
177 syslog(LOG_ERR, "getty exiting due to excessive running time");
182 main(int argc, char *argv[])
184 int first_sleep = 1, first_time = 1;
188 signal(SIGINT, SIG_IGN);
189 signal(SIGQUIT, SIG_IGN);
191 openlog("getty", LOG_CONS|LOG_PID, LOG_AUTH);
192 gethostname(hostname, sizeof(hostname) - 1);
193 hostname[sizeof(hostname) - 1] = '\0';
194 if (hostname[0] == '\0')
195 strcpy(hostname, "Amnesiac");
198 * Limit running time to deal with broken or dead lines.
200 (void)signal(SIGXCPU, timeoverrun);
201 limit.rlim_max = RLIM_INFINITY;
202 limit.rlim_cur = GETTY_TIMEOUT;
203 (void)setrlimit(RLIMIT_CPU, &limit);
205 gettable("default", defent);
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.
218 if (argc <= 2 || strcmp(argv[2], "-") == 0)
219 strcpy(ttyn, ttyname(STDIN_FILENO));
222 strncat(ttyn, argv[2], sizeof(ttyn)-sizeof(dev));
223 if (strcmp(argv[0], "+") != 0) {
229 * Do the first scan through gettytab.
230 * Terminal mode parameters will be wrong until
231 * defttymode() called, but they're irrelevant for
232 * the initial setup of the terminal device.
237 * Init or answer modem sequence has been specified.
240 if (!opentty(ttyn, O_RDWR|O_NONBLOCK))
247 if (getty_chat(IC, CT, DC) > 0) {
248 syslog(LOG_ERR, "modem init problem on %s", ttyn);
249 (void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode);
258 rfds = 1 << 0; /* FD_SET */
261 i = select(32, (fd_set*)&rfds, (fd_set*)NULL,
262 (fd_set*)NULL, RT ? &to : NULL);
264 syslog(LOG_ERR, "select %s: %m", ttyn);
266 syslog(LOG_NOTICE, "recycle tty %s", ttyn);
267 (void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode);
268 exit(0); /* recycle for init */
270 i = getty_chat(AC, CT, DC);
272 syslog(LOG_ERR, "modem answer problem on %s", ttyn);
273 (void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode);
276 } else { /* maybe blocking open */
277 if (!opentty(ttyn, O_RDWR | (NC ? O_NONBLOCK : 0 )))
287 * if a delay was specified then sleep for that
288 * number of seconds before writing the initial prompt
290 if (first_sleep && DE) {
292 /* remove any noise */
293 (void)tcflush(STDIN_FILENO, TCIOFLUSH);
304 tname = portselector();
312 /* if this is the first time through this, and an
313 issue file has been given, then send it */
314 if (first_time && IF) {
317 if ((fd = open(IF, O_RDONLY)) != -1) {
320 while ((cp = get_line(fd)) != NULL) {
328 if (IMP && *IMP && !(PL && PP))
330 if (IM && *IM && !(PL && PP))
332 if (setjmp(timeout)) {
333 cfsetispeed(&tmode, B0);
334 cfsetospeed(&tmode, B0);
335 (void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode);
339 signal(SIGALRM, dingdong);
348 while (*p && q < &name[sizeof name - 1]) {
351 else if (islower(*p))
353 else if (isdigit(*p))
357 } else if (!(PL && PP))
359 if (rval == 2 || (PL && PP)) {
362 limit.rlim_max = RLIM_INFINITY;
363 limit.rlim_cur = RLIM_INFINITY;
364 (void)setrlimit(RLIMIT_CPU, &limit);
365 execle(PP, "ppplogin", ttyn, (char *) 0, env);
366 syslog(LOG_ERR, "%s: %m", PP);
368 } else if (rval || AL) {
373 signal(SIGALRM, SIG_DFL);
376 if (name[0] == '-') {
377 puts("user names may not start with '-'.");
380 if (!(upper || lower || digit)) {
383 "invalid auto-login name: %s", AL);
390 tmode.c_iflag |= ICRNL;
391 tmode.c_oflag |= ONLCR;
395 tmode.sg_flags |= LCASE;
397 tmode.sg_flags &= ~LCASE;
399 if (tcsetattr(STDIN_FILENO, TCSANOW, &tmode) < 0) {
400 syslog(LOG_ERR, "tcsetattr %s: %m", ttyn);
403 signal(SIGINT, SIG_DFL);
404 for (i = 0; environ[i] != (char *)0; i++)
408 limit.rlim_max = RLIM_INFINITY;
409 limit.rlim_cur = RLIM_INFINITY;
410 (void)setrlimit(RLIMIT_CPU, &limit);
411 execle(LO, "login", AL ? "-fp" : "-p", name,
413 syslog(LOG_ERR, "%s: %m", LO);
417 signal(SIGALRM, SIG_DFL);
418 signal(SIGINT, SIG_IGN);
427 opentty(const char *tty, int flags)
430 int failopenlogged = 0;
432 while ((i = open(tty, flags)) == -1)
434 if (!failopenlogged) {
435 syslog(LOG_ERR, "open %s: %m", tty);
440 if (login_tty(i) < 0) {
441 if (daemon(0,0) < 0) {
442 syslog(LOG_ERR,"daemon: %m");
446 if (login_tty(i) < 0) {
447 syslog(LOG_ERR, "login_tty %s: %m", tty);
460 /* Start with default tty settings. */
461 if (tcgetattr(STDIN_FILENO, &tmode) < 0) {
462 syslog(LOG_ERR, "tcgetattr %s: %m", ttyn);
465 omode = tmode; /* fill c_cc for dogettytab() */
468 * Don't rely on the driver too much, and initialize crucial
469 * things according to <sys/ttydefaults.h>. Avoid clobbering
470 * the c_cc[] settings however, the console drivers might wish
471 * to leave their idea of the preferred VERASE key value
475 tmode.c_iflag = def.c_iflag;
476 tmode.c_oflag = def.c_oflag;
477 tmode.c_lflag = def.c_lflag;
478 tmode.c_cflag = def.c_cflag;
480 tmode.c_cflag |= CLOCAL;
489 (void)tcflush(STDIN_FILENO, TCIOFLUSH); /* clear out the crap */
490 ioctl(STDIN_FILENO, FIONBIO, &off); /* turn off non-blocking mode */
491 ioctl(STDIN_FILENO, FIOASYNC, &off); /* ditto for async mode */
494 cfsetispeed(&tmode, speed(IS));
496 cfsetispeed(&tmode, speed(SP));
498 cfsetospeed(&tmode, speed(OS));
500 cfsetospeed(&tmode, speed(SP));
505 if (tcsetattr(STDIN_FILENO, TCSANOW, &tmode) < 0) {
506 syslog(LOG_ERR, "tcsetattr %s: %m", ttyn);
519 int ppp_connection = 0;
522 * Interrupt may happen if we use CBREAK mode
524 if (setjmp(intrupt)) {
525 signal(SIGINT, SIG_IGN);
528 signal(SIGINT, interrupt);
536 if (tcsetattr(STDIN_FILENO, TCSANOW, &tmode) < 0) {
537 syslog(LOG_ERR, "%s: %m", ttyn);
540 crmod = digit = lower = upper = 0;
544 if (read(STDIN_FILENO, &cs, 1) <= 0)
546 if ((c = cs&0177) == 0)
549 /* PPP detection state machine..
551 PPP_FRAME, PPP_STATION, PPP_ESCAPE, PPP_CONTROL_ESCAPED or
552 PPP_FRAME, PPP_STATION, PPP_CONTROL (deviant from RFC)
554 Derived from code from Michael Hancock, <michaelh@cet.co.jp>
555 and Erik 'PPP' Olson, <eriko@wrq.com>
558 if (PP && (cs == PPP_FRAME)) {
560 } else if (ppp_state == 1 && cs == PPP_STATION) {
562 } else if (ppp_state == 2 && cs == PPP_ESCAPE) {
564 } else if ((ppp_state == 2 && cs == PPP_CONTROL)
565 || (ppp_state == 3 && cs == PPP_CONTROL_ESCAPED)) {
567 } else if (ppp_state == 4 && cs == PPP_LCP_HI) {
569 } else if (ppp_state == 5 && cs == PPP_LCP_LOW) {
576 if (c == EOT || c == CTRL('d'))
578 if (c == '\r' || c == '\n' || np >= &name[sizeof name-1]) {
586 else if (c == ERASE || c == '\b' || c == 0177) {
589 if (cfgetospeed(&tmode) >= 1200)
595 } else if (c == KILL || c == CTRL('u')) {
597 if (cfgetospeed(&tmode) < 1200)
599 /* this is the way they do it down under ... */
603 digit = lower = upper = 0;
606 } else if (isdigit(c))
608 if (IG && (c <= ' ' || c > 0176))
613 signal(SIGINT, SIG_IGN);
617 if ((upper && !lower && !LC) || UC)
618 for (np = name; *np; np++)
621 return (1 + ppp_connection);
625 putpad(const char *s)
628 speed_t ospeed = cfgetospeed(&tmode);
631 while (isdigit(*s)) {
636 if (*s == '.' && isdigit(s[1])) {
644 * If no delay needed, or output speed is
645 * not comprehensible, then don't try to delay.
647 if (pad == 0 || ospeed <= 0)
651 * Round up by a half a character frame, and then do the delay.
652 * Too bad there are no user program accessible programmed delays.
653 * Transmitting pad characters slows many terminals down and also
656 pad = (pad * ospeed + 50000) / 100000;
668 static char outbuf[OBUFSIZ];
669 static int obufcnt = 0;
678 c |= partab[c&0177] & 0200;
683 outbuf[obufcnt++] = c;
684 if (obufcnt >= OBUFSIZ)
687 write(STDOUT_FILENO, &c, 1);
694 write(STDOUT_FILENO, outbuf, obufcnt);
712 static char linebuf[512];
715 * This is certainly slow, but it avoids having to include
716 * stdio.h unnecessarily. Issue files should be small anyway.
718 while (i < (sizeof linebuf - 3) && read(fd, linebuf+i, 1)==1) {
719 if (linebuf[i] == '\n') {
720 /* Don't rely on newline mode, assume raw */
729 return i ? linebuf : 0;
736 char *slash, db[100];
738 static struct utsname kerninfo;
740 if (!*kerninfo.sysname)
751 slash = strrchr(ttyn, '/');
752 if (slash == (char *) 0)
766 (void)setlocale(LC_TIME, Lo);
767 (void)strftime(db, sizeof(db), DF, localtime(&t));
772 puts(kerninfo.sysname);
776 puts(kerninfo.machine);
780 puts(kerninfo.release);
784 puts(kerninfo.version);
797 * Read a gettytab database entry and perform necessary quirks.
803 /* Read the database entry. */
804 gettable(tname, tabent);
807 * Avoid inheriting the parity values from the default entry
808 * if any of them is set in the current entry.
809 * Mixing different parity settings is unreasonable.
811 if (OPset || EPset || APset || NPset)
812 OPset = EPset = APset = NPset = 1;
814 /* Fill in default values for unset capabilities. */