2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
35 static const char copyright[] =
36 "@(#) Copyright (c) 1980, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
42 static char sccsid[] = "@(#)from: main.c 8.1 (Berkeley) 6/20/93";
44 static const char rcsid[] =
48 #include <sys/param.h>
49 #include <sys/ioctl.h>
51 #include <sys/resource.h>
53 #include <sys/ttydefaults.h>
54 #include <sys/utsname.h>
72 #include "pathnames.h"
75 * Set the amount of running time that getty should accumulate
76 * before deciding that something is wrong and exit.
78 #define GETTY_TIMEOUT 60 /* seconds */
81 #define CTRL(x) (x&037)
83 /* defines for auto detection of incoming PPP calls (->PAP/CHAP) */
85 #define PPP_FRAME 0x7e /* PPP Framing character */
86 #define PPP_STATION 0xff /* "All Station" character */
87 #define PPP_ESCAPE 0x7d /* Escape Character */
88 #define PPP_CONTROL 0x03 /* PPP Control Field */
89 #define PPP_CONTROL_ESCAPED 0x23 /* PPP Control Field, escaped */
90 #define PPP_LCP_HI 0xc0 /* LCP protocol - high byte */
91 #define PPP_LCP_LOW 0x21 /* LCP protocol - low byte */
93 /* original mode; flags've been reset using values from <sys/ttydefaults.h> */
98 int crmod, digit, lower, upper;
100 char hostname[MAXHOSTNAMELEN];
101 char name[MAXLOGNAME*3];
102 char dev[] = _PATH_DEV;
106 #define TABBUFSIZ 512
108 char defent[TABBUFSIZ];
109 char tabent[TABBUFSIZ];
115 0001,0201,0201,0001,0201,0001,0001,0201,
116 0202,0004,0003,0205,0005,0206,0201,0001,
117 0201,0001,0001,0201,0001,0201,0201,0001,
118 0001,0201,0201,0001,0201,0001,0001,0201,
119 0200,0000,0000,0200,0000,0200,0200,0000,
120 0000,0200,0200,0000,0200,0000,0000,0200,
121 0000,0200,0200,0000,0200,0000,0000,0200,
122 0200,0000,0000,0200,0000,0200,0200,0000,
123 0200,0000,0000,0200,0000,0200,0200,0000,
124 0000,0200,0200,0000,0200,0000,0000,0200,
125 0000,0200,0200,0000,0200,0000,0000,0200,
126 0200,0000,0000,0200,0000,0200,0200,0000,
127 0000,0200,0200,0000,0200,0000,0000,0200,
128 0200,0000,0000,0200,0000,0200,0200,0000,
129 0200,0000,0000,0200,0000,0200,0200,0000,
130 0000,0200,0200,0000,0200,0000,0000,0201
133 #define ERASE tmode.c_cc[VERASE]
134 #define KILL tmode.c_cc[VKILL]
135 #define EOT tmode.c_cc[VEOF]
139 static void defttymode(void);
140 static void dingdong(int);
141 static void dogettytab(void);
142 static int getname(void);
143 static void interrupt(int);
144 static void oflush(void);
145 static void prompt(void);
146 static void putchr(int);
147 static void putf(const char *);
148 static void putpad(const char *);
149 static void puts(const char *);
150 static void timeoverrun(int);
151 static char *getline(int);
152 static void setttymode(int);
153 static int opentty(const char *, int);
158 dingdong(int signo __unused)
167 interrupt(int signo __unused)
173 * Action to take when getty is running too long.
176 timeoverrun(int signo __unused)
179 syslog(LOG_ERR, "getty exiting due to excessive running time");
184 main(int argc, char *argv[])
186 extern char **environ;
187 int first_sleep = 1, first_time = 1;
191 signal(SIGINT, SIG_IGN);
192 signal(SIGQUIT, SIG_IGN);
194 openlog("getty", LOG_ODELAY|LOG_CONS|LOG_PID, LOG_AUTH);
195 gethostname(hostname, sizeof(hostname) - 1);
196 hostname[sizeof(hostname) - 1] = '\0';
197 if (hostname[0] == '\0')
198 strcpy(hostname, "Amnesiac");
201 * Limit running time to deal with broken or dead lines.
203 (void)signal(SIGXCPU, timeoverrun);
204 limit.rlim_max = RLIM_INFINITY;
205 limit.rlim_cur = GETTY_TIMEOUT;
206 (void)setrlimit(RLIMIT_CPU, &limit);
208 gettable("default", defent);
215 * The following is a work around for vhangup interactions
216 * which cause great problems getting window systems started.
217 * If the tty line is "-", we do the old style getty presuming
218 * that the file descriptors are already set up for us.
219 * J. Gettys - MIT Project Athena.
221 if (argc <= 2 || strcmp(argv[2], "-") == 0)
222 strcpy(ttyn, ttyname(STDIN_FILENO));
225 strncat(ttyn, argv[2], sizeof(ttyn)-sizeof(dev));
226 if (strcmp(argv[0], "+") != 0) {
232 * Do the first scan through gettytab.
233 * Terminal mode parameters will be wrong until
234 * defttymode() called, but they're irrelevant for
235 * the initial setup of the terminal device.
240 * Init or answer modem sequence has been specified.
243 if (!opentty(ttyn, O_RDWR|O_NONBLOCK))
250 if (getty_chat(IC, CT, DC) > 0) {
251 syslog(LOG_ERR, "modem init problem on %s", ttyn);
252 (void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode);
261 rfds = 1 << 0; /* FD_SET */
264 i = select(32, (fd_set*)&rfds, (fd_set*)NULL,
265 (fd_set*)NULL, RT ? &to : NULL);
267 syslog(LOG_ERR, "select %s: %m", ttyn);
269 syslog(LOG_NOTICE, "recycle tty %s", ttyn);
270 (void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode);
271 exit(0); /* recycle for init */
273 i = getty_chat(AC, CT, DC);
275 syslog(LOG_ERR, "modem answer problem on %s", ttyn);
276 (void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode);
279 } else { /* maybe blocking open */
280 if (!opentty(ttyn, O_RDWR | (NC ? O_NONBLOCK : 0 )))
290 * if a delay was specified then sleep for that
291 * number of seconds before writing the initial prompt
293 if (first_sleep && DE) {
295 /* remove any noise */
296 (void)tcflush(STDIN_FILENO, TCIOFLUSH);
307 tname = portselector();
315 /* if this is the first time through this, and an
316 issue file has been given, then send it */
317 if (first_time && IF) {
320 if ((fd = open(IF, O_RDONLY)) != -1) {
323 while ((cp = getline(fd)) != NULL) {
331 if (IM && *IM && !(PL && PP))
333 if (setjmp(timeout)) {
334 cfsetispeed(&tmode, B0);
335 cfsetospeed(&tmode, B0);
336 (void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode);
340 signal(SIGALRM, dingdong);
349 while (*p && q < &name[sizeof name - 1]) {
352 else if (islower(*p))
354 else if (isdigit(*p))
358 } else if (!(PL && PP))
360 if (rval == 2 || (PL && PP)) {
363 limit.rlim_max = RLIM_INFINITY;
364 limit.rlim_cur = RLIM_INFINITY;
365 (void)setrlimit(RLIMIT_CPU, &limit);
366 execle(PP, "ppplogin", ttyn, (char *) 0, env);
367 syslog(LOG_ERR, "%s: %m", PP);
369 } else if (rval || AL) {
374 signal(SIGALRM, SIG_DFL);
377 if (name[0] == '-') {
378 puts("user names may not start with '-'.");
381 if (!(upper || lower || digit)) {
384 "invalid auto-login name: %s", AL);
391 tmode.c_iflag |= ICRNL;
392 tmode.c_oflag |= ONLCR;
396 tmode.sg_flags |= LCASE;
398 tmode.sg_flags &= ~LCASE;
400 if (tcsetattr(STDIN_FILENO, TCSANOW, &tmode) < 0) {
401 syslog(LOG_ERR, "tcsetattr %s: %m", ttyn);
404 signal(SIGINT, SIG_DFL);
405 for (i = 0; environ[i] != (char *)0; i++)
409 limit.rlim_max = RLIM_INFINITY;
410 limit.rlim_cur = RLIM_INFINITY;
411 (void)setrlimit(RLIMIT_CPU, &limit);
412 execle(LO, "login", AL ? "-fp" : "-p", name,
414 syslog(LOG_ERR, "%s: %m", LO);
418 signal(SIGALRM, SIG_DFL);
419 signal(SIGINT, SIG_IGN);
428 opentty(const char *tty, int flags)
431 int failopenlogged = 0;
433 while ((i = open(tty, flags)) == -1)
435 if (!failopenlogged) {
436 syslog(LOG_ERR, "open %s: %m", tty);
441 if (login_tty(i) < 0) {
442 if (daemon(0,0) < 0) {
443 syslog(LOG_ERR,"daemon: %m");
447 if (login_tty(i) < 0) {
448 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
474 tmode.c_iflag = TTYDEF_IFLAG;
475 tmode.c_oflag = TTYDEF_OFLAG;
476 tmode.c_lflag = TTYDEF_LFLAG;
477 tmode.c_cflag = TTYDEF_CFLAG;
479 tmode.c_cflag |= CLOCAL;
488 (void)tcflush(STDIN_FILENO, TCIOFLUSH); /* clear out the crap */
489 ioctl(STDIN_FILENO, FIONBIO, &off); /* turn off non-blocking mode */
490 ioctl(STDIN_FILENO, FIOASYNC, &off); /* ditto for async mode */
493 cfsetispeed(&tmode, speed(IS));
495 cfsetispeed(&tmode, speed(SP));
497 cfsetospeed(&tmode, speed(OS));
499 cfsetospeed(&tmode, speed(SP));
504 if (tcsetattr(STDIN_FILENO, TCSANOW, &tmode) < 0) {
505 syslog(LOG_ERR, "tcsetattr %s: %m", ttyn);
518 int ppp_connection = 0;
521 * Interrupt may happen if we use CBREAK mode
523 if (setjmp(intrupt)) {
524 signal(SIGINT, SIG_IGN);
527 signal(SIGINT, interrupt);
535 if (tcsetattr(STDIN_FILENO, TCSANOW, &tmode) < 0) {
536 syslog(LOG_ERR, "%s: %m", ttyn);
539 crmod = digit = lower = upper = 0;
543 if (read(STDIN_FILENO, &cs, 1) <= 0)
545 if ((c = cs&0177) == 0)
548 /* PPP detection state machine..
550 PPP_FRAME, PPP_STATION, PPP_ESCAPE, PPP_CONTROL_ESCAPED or
551 PPP_FRAME, PPP_STATION, PPP_CONTROL (deviant from RFC)
553 Derived from code from Michael Hancock, <michaelh@cet.co.jp>
554 and Erik 'PPP' Olson, <eriko@wrq.com>
557 if (PP && (cs == PPP_FRAME)) {
559 } else if (ppp_state == 1 && cs == PPP_STATION) {
561 } else if (ppp_state == 2 && cs == PPP_ESCAPE) {
563 } else if ((ppp_state == 2 && cs == PPP_CONTROL)
564 || (ppp_state == 3 && cs == PPP_CONTROL_ESCAPED)) {
566 } else if (ppp_state == 4 && cs == PPP_LCP_HI) {
568 } else if (ppp_state == 5 && cs == PPP_LCP_LOW) {
575 if (c == EOT || c == CTRL('d'))
577 if (c == '\r' || c == '\n' || np >= &name[sizeof name-1]) {
585 else if (c == ERASE || c == '\b' || c == 0177) {
588 if (cfgetospeed(&tmode) >= 1200)
594 } else if (c == KILL || c == CTRL('u')) {
596 if (cfgetospeed(&tmode) < 1200)
598 /* this is the way they do it down under ... */
602 digit = lower = upper = 0;
605 } else if (isdigit(c))
607 if (IG && (c <= ' ' || c > 0176))
612 signal(SIGINT, SIG_IGN);
616 if ((upper && !lower && !LC) || UC)
617 for (np = name; *np; np++)
620 return (1 + ppp_connection);
624 putpad(const char *s)
627 speed_t ospeed = cfgetospeed(&tmode);
630 while (isdigit(*s)) {
635 if (*s == '.' && isdigit(s[1])) {
643 * If no delay needed, or output speed is
644 * not comprehensible, then don't try to delay.
646 if (pad == 0 || ospeed <= 0)
650 * Round up by a half a character frame, and then do the delay.
651 * Too bad there are no user program accessible programmed delays.
652 * Transmitting pad characters slows many terminals down and also
655 pad = (pad * ospeed + 50000) / 100000;
667 char outbuf[OBUFSIZ];
677 c |= partab[c&0177] & 0200;
682 outbuf[obufcnt++] = c;
683 if (obufcnt >= OBUFSIZ)
686 write(STDOUT_FILENO, &c, 1);
693 write(STDOUT_FILENO, outbuf, obufcnt);
711 static char linebuf[512];
714 * This is certainly slow, but it avoids having to include
715 * stdio.h unnecessarily. Issue files should be small anyway.
717 while (i < (sizeof linebuf - 3) && read(fd, linebuf+i, 1)==1) {
718 if (linebuf[i] == '\n') {
719 /* Don't rely on newline mode, assume raw */
728 return i ? linebuf : 0;
734 extern char editedhost[];
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. */