561 lines
12 KiB
C
561 lines
12 KiB
C
/*-
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char copyright[] =
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"@(#) Copyright (c) 1980, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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/*static char sccsid[] = "from: @(#)main.c 8.1 (Berkeley) 6/20/93";*/
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static char rcsid[] = "$Id: main.c,v 1.16 1996/02/08 06:19:14 mycroft Exp $";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <termios.h>
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#include <sys/ioctl.h>
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#include <sys/resource.h>
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#include <sys/utsname.h>
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#include <errno.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <time.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <setjmp.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <time.h>
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#include <unistd.h>
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#include "gettytab.h"
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#include "pathnames.h"
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#include "extern.h"
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/*
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* Set the amount of running time that getty should accumulate
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* before deciding that something is wrong and exit.
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*/
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#define GETTY_TIMEOUT 60 /* seconds */
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struct termios tmode, omode;
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int crmod, digit, lower, upper;
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char hostname[MAXHOSTNAMELEN];
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struct utsname kerninfo;
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char name[16];
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char dev[] = _PATH_DEV;
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char ttyn[32];
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char *portselector();
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char *ttyname();
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#define OBUFSIZ 128
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#define TABBUFSIZ 512
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char defent[TABBUFSIZ];
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char tabent[TABBUFSIZ];
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char *env[128];
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char partab[] = {
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0001,0201,0201,0001,0201,0001,0001,0201,
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0202,0004,0003,0205,0005,0206,0201,0001,
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0201,0001,0001,0201,0001,0201,0201,0001,
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0001,0201,0201,0001,0201,0001,0001,0201,
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0200,0000,0000,0200,0000,0200,0200,0000,
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0000,0200,0200,0000,0200,0000,0000,0200,
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0000,0200,0200,0000,0200,0000,0000,0200,
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0200,0000,0000,0200,0000,0200,0200,0000,
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0200,0000,0000,0200,0000,0200,0200,0000,
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0000,0200,0200,0000,0200,0000,0000,0200,
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0000,0200,0200,0000,0200,0000,0000,0200,
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0200,0000,0000,0200,0000,0200,0200,0000,
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0000,0200,0200,0000,0200,0000,0000,0200,
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0200,0000,0000,0200,0000,0200,0200,0000,
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0200,0000,0000,0200,0000,0200,0200,0000,
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0000,0200,0200,0000,0200,0000,0000,0201
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};
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#define ERASE tmode.c_cc[VERASE]
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#define KILL tmode.c_cc[VKILL]
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#define EOT tmode.c_cc[VEOF]
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jmp_buf timeout;
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static void
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dingdong()
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{
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alarm(0);
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signal(SIGALRM, SIG_DFL);
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longjmp(timeout, 1);
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}
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jmp_buf intrupt;
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static void
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interrupt()
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{
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signal(SIGINT, interrupt);
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longjmp(intrupt, 1);
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}
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/*
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* Action to take when getty is running too long.
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*/
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void
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timeoverrun(signo)
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int signo;
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{
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syslog(LOG_ERR, "getty exiting due to excessive running time\n");
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exit(1);
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}
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static int getname __P((void));
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static void oflush __P((void));
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static void prompt __P((void));
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static void putchr __P((int));
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static void putf __P((char *));
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static void putpad __P((char *));
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static void puts __P((char *));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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extern char **environ;
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char *tname;
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long allflags;
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int repcnt = 0, failopenlogged = 0;
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struct rlimit limit;
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signal(SIGINT, SIG_IGN);
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/*
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signal(SIGQUIT, SIG_DFL);
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*/
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openlog("getty", LOG_ODELAY|LOG_CONS|LOG_PID, LOG_AUTH);
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gethostname(hostname, sizeof(hostname));
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if (hostname[0] == '\0')
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strcpy(hostname, "Amnesiac");
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uname(&kerninfo);
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/*
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* Limit running time to deal with broken or dead lines.
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*/
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(void)signal(SIGXCPU, timeoverrun);
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limit.rlim_max = RLIM_INFINITY;
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limit.rlim_cur = GETTY_TIMEOUT;
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(void)setrlimit(RLIMIT_CPU, &limit);
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/*
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* The following is a work around for vhangup interactions
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* which cause great problems getting window systems started.
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* If the tty line is "-", we do the old style getty presuming
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* that the file descriptors are already set up for us.
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* J. Gettys - MIT Project Athena.
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*/
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if (argc <= 2 || strcmp(argv[2], "-") == 0)
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strcpy(ttyn, ttyname(0));
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else {
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int i;
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strcpy(ttyn, dev);
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strncat(ttyn, argv[2], sizeof(ttyn)-sizeof(dev));
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if (strcmp(argv[0], "+") != 0) {
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chown(ttyn, 0, 0);
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chmod(ttyn, 0600);
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revoke(ttyn);
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/*
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* Delay the open so DTR stays down long enough to be detected.
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*/
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sleep(2);
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while ((i = open(ttyn, O_RDWR)) == -1) {
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if ((repcnt % 10 == 0) &&
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(errno != ENXIO || !failopenlogged)) {
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syslog(LOG_ERR, "%s: %m", ttyn);
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closelog();
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failopenlogged = 1;
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}
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repcnt++;
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sleep(60);
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}
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login_tty(i);
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}
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}
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/* Start with default tty settings */
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if (tcgetattr(0, &tmode) < 0) {
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syslog(LOG_ERR, "%s: %m", ttyn);
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exit(1);
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}
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omode = tmode;
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gettable("default", defent);
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gendefaults();
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tname = "default";
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if (argc > 1)
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tname = argv[1];
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for (;;) {
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int off;
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gettable(tname, tabent);
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if (OPset || EPset || APset)
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APset++, OPset++, EPset++;
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setdefaults();
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off = 0;
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(void)tcflush(0, TCIOFLUSH); /* clear out the crap */
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ioctl(0, FIONBIO, &off); /* turn off non-blocking mode */
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ioctl(0, FIOASYNC, &off); /* ditto for async mode */
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if (IS)
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cfsetispeed(&tmode, IS);
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else if (SP)
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cfsetispeed(&tmode, SP);
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if (OS)
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cfsetospeed(&tmode, OS);
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else if (SP)
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cfsetospeed(&tmode, SP);
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setflags(0);
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setchars();
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if (tcsetattr(0, TCSANOW, &tmode) < 0) {
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syslog(LOG_ERR, "%s: %m", ttyn);
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exit(1);
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}
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if (AB) {
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extern char *autobaud();
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tname = autobaud();
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continue;
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}
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if (PS) {
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tname = portselector();
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continue;
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}
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if (CL && *CL)
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putpad(CL);
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edithost(HE);
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if (IM && *IM)
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putf(IM);
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if (setjmp(timeout)) {
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tmode.c_ispeed = tmode.c_ospeed = 0;
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(void)tcsetattr(0, TCSANOW, &tmode);
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exit(1);
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}
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if (TO) {
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signal(SIGALRM, dingdong);
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alarm(TO);
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}
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if (getname()) {
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register int i;
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oflush();
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alarm(0);
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signal(SIGALRM, SIG_DFL);
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if (name[0] == '-') {
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puts("user names may not start with '-'.");
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continue;
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}
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if (!(upper || lower || digit))
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continue;
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setflags(2);
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if (crmod) {
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tmode.c_iflag |= ICRNL;
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tmode.c_oflag |= ONLCR;
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}
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#if XXX
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if (upper || UC)
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tmode.sg_flags |= LCASE;
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if (lower || LC)
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tmode.sg_flags &= ~LCASE;
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#endif
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if (tcsetattr(0, TCSANOW, &tmode) < 0) {
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syslog(LOG_ERR, "%s: %m", ttyn);
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exit(1);
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}
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signal(SIGINT, SIG_DFL);
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for (i = 0; environ[i] != (char *)0; i++)
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env[i] = environ[i];
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makeenv(&env[i]);
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limit.rlim_max = RLIM_INFINITY;
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limit.rlim_cur = RLIM_INFINITY;
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(void)setrlimit(RLIMIT_CPU, &limit);
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execle(LO, "login", "-p", "--", name, (char *)0, env);
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syslog(LOG_ERR, "%s: %m", LO);
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exit(1);
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}
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alarm(0);
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signal(SIGALRM, SIG_DFL);
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signal(SIGINT, SIG_IGN);
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if (NX && *NX)
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tname = NX;
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}
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}
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static int
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getname()
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{
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register int c;
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register char *np;
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char cs;
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/*
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* Interrupt may happen if we use CBREAK mode
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*/
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if (setjmp(intrupt)) {
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signal(SIGINT, SIG_IGN);
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return (0);
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}
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signal(SIGINT, interrupt);
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setflags(1);
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prompt();
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if (PF > 0) {
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oflush();
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sleep(PF);
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PF = 0;
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}
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if (tcsetattr(0, TCSANOW, &tmode) < 0) {
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syslog(LOG_ERR, "%s: %m", ttyn);
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exit(1);
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}
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crmod = digit = lower = upper = 0;
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np = name;
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for (;;) {
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oflush();
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if (read(STDIN_FILENO, &cs, 1) <= 0)
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exit(0);
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if ((c = cs&0177) == 0)
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return (0);
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if (c == EOT)
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exit(1);
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if (c == '\r' || c == '\n' || np >= &name[sizeof name]) {
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putf("\r\n");
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break;
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}
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if (islower(c))
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lower = 1;
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else if (isupper(c))
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upper = 1;
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else if (c == ERASE || c == '#' || c == '\b') {
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if (np > name) {
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np--;
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if (cfgetospeed(&tmode) >= 1200)
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puts("\b \b");
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else
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putchr(cs);
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}
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continue;
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} else if (c == KILL || c == '@') {
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putchr(cs);
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putchr('\r');
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if (cfgetospeed(&tmode) < 1200)
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putchr('\n');
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/* this is the way they do it down under ... */
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else if (np > name)
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puts(" \r");
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prompt();
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np = name;
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continue;
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} else if (isdigit(c))
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digit++;
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if (IG && (c <= ' ' || c > 0176))
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continue;
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*np++ = c;
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putchr(cs);
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}
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signal(SIGINT, SIG_IGN);
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*np = 0;
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if (c == '\r')
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crmod = 1;
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if (upper && !lower && !LC || UC)
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for (np = name; *np; np++)
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if (isupper(*np))
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*np = tolower(*np);
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return (1);
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}
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static void
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putpad(s)
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register char *s;
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{
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register pad = 0;
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speed_t ospeed = cfgetospeed(&tmode);
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if (isdigit(*s)) {
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while (isdigit(*s)) {
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pad *= 10;
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pad += *s++ - '0';
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}
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pad *= 10;
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if (*s == '.' && isdigit(s[1])) {
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pad += s[1] - '0';
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s += 2;
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}
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}
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puts(s);
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/*
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* If no delay needed, or output speed is
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* not comprehensible, then don't try to delay.
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*/
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if (pad == 0 || ospeed <= 0)
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return;
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/*
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* Round up by a half a character frame, and then do the delay.
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* Too bad there are no user program accessible programmed delays.
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* Transmitting pad characters slows many terminals down and also
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* loads the system.
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*/
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pad = (pad * ospeed + 50000) / 100000;
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while (pad--)
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putchr(*PC);
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}
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static void
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puts(s)
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register char *s;
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{
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while (*s)
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putchr(*s++);
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}
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char outbuf[OBUFSIZ];
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int obufcnt = 0;
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static void
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putchr(cc)
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int cc;
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{
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char c;
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c = cc;
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if (!NP) {
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c |= partab[c&0177] & 0200;
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if (OP)
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c ^= 0200;
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}
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if (!UB) {
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outbuf[obufcnt++] = c;
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if (obufcnt >= OBUFSIZ)
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oflush();
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} else
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write(STDOUT_FILENO, &c, 1);
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}
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static void
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oflush()
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{
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if (obufcnt)
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write(STDOUT_FILENO, outbuf, obufcnt);
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obufcnt = 0;
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}
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static void
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prompt()
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{
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putf(LM);
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if (CO)
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putchr('\n');
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}
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static void
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putf(cp)
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register char *cp;
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{
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extern char editedhost[];
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time_t t;
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char *slash, db[100];
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while (*cp) {
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if (*cp != '%') {
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putchr(*cp++);
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continue;
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}
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switch (*++cp) {
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case 't':
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slash = strrchr(ttyn, '/');
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if (slash == (char *) 0)
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puts(ttyn);
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else
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puts(&slash[1]);
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break;
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case 'h':
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puts(editedhost);
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break;
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case 'd': {
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static char fmt[] = "%l:% %p on %A, %d %B %Y";
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fmt[4] = 'M'; /* I *hate* SCCS... */
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(void)time(&t);
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(void)strftime(db, sizeof(db), fmt, localtime(&t));
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puts(db);
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break;
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case 's':
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puts(kerninfo.sysname);
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break;
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case 'm':
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puts(kerninfo.machine);
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break;
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case 'r':
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puts(kerninfo.release);
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break;
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case 'v':
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puts(kerninfo.version);
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break;
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}
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case '%':
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putchr('%');
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break;
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}
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cp++;
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}
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}
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