820 lines
18 KiB
C
820 lines
18 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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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. 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 const 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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#if 0
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static char sccsid[] = "@(#)from: main.c 8.1 (Berkeley) 6/20/93";
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#endif
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/stat.h>
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#include <sys/ttydefaults.h>
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#include <sys/utsname.h>
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <locale.h>
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#include <libutil.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 <termios.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 "extern.h"
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#include "pathnames.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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#undef CTRL
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#define CTRL(x) (x&037)
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/* defines for auto detection of incoming PPP calls (->PAP/CHAP) */
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#define PPP_FRAME 0x7e /* PPP Framing character */
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#define PPP_STATION 0xff /* "All Station" character */
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#define PPP_ESCAPE 0x7d /* Escape Character */
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#define PPP_CONTROL 0x03 /* PPP Control Field */
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#define PPP_CONTROL_ESCAPED 0x23 /* PPP Control Field, escaped */
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#define PPP_LCP_HI 0xc0 /* LCP protocol - high byte */
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#define PPP_LCP_LOW 0x21 /* LCP protocol - low byte */
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/* original mode; flags've been reset using values from <sys/ttydefaults.h> */
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struct termios omode;
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/* current mode */
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struct termios tmode;
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static int crmod, digit, lower, upper;
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char hostname[MAXHOSTNAMELEN];
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static char name[MAXLOGNAME*3];
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static char ttyn[32];
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#define OBUFSIZ 128
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#define TABBUFSIZ 512
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static char defent[TABBUFSIZ];
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static char tabent[TABBUFSIZ];
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static const char *tname;
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static char *env[128];
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static 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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#define puts Gputs
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static void defttymode(void);
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static void dingdong(int);
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static void dogettytab(void);
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static int getname(void);
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static void interrupt(int);
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static void oflush(void);
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static void prompt(void);
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static void putchr(int);
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static void putf(const char *);
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static void putpad(const char *);
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static void puts(const char *);
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static void timeoverrun(int);
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static char *get_line(int);
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static void setttymode(int);
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static int opentty(const char *, int);
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static jmp_buf timeout;
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static void
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dingdong(int signo __unused)
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{
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alarm(0);
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longjmp(timeout, 1);
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}
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static jmp_buf intrupt;
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static void
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interrupt(int signo __unused)
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{
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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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static void
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timeoverrun(int signo __unused)
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{
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syslog(LOG_ERR, "getty exiting due to excessive running time");
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exit(1);
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}
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int
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main(int argc, char *argv[])
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{
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int first_sleep = 1, first_time = 1;
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struct rlimit limit;
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int rval;
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signal(SIGINT, SIG_IGN);
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signal(SIGQUIT, SIG_IGN);
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openlog("getty", LOG_CONS|LOG_PID, LOG_AUTH);
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gethostname(hostname, sizeof(hostname) - 1);
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hostname[sizeof(hostname) - 1] = '\0';
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if (hostname[0] == '\0')
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strcpy(hostname, "Amnesiac");
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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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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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/*
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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(STDIN_FILENO));
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else {
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strcpy(ttyn, _PATH_DEV);
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strlcat(ttyn, argv[2], sizeof(ttyn));
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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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* Do the first scan through gettytab.
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* Terminal mode parameters will be wrong until
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* defttymode() called, but they're irrelevant for
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* the initial setup of the terminal device.
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*/
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dogettytab();
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/*
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* Init or answer modem sequence has been specified.
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*/
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if (IC || AC) {
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if (!opentty(ttyn, O_RDWR|O_NONBLOCK))
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exit(1);
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defttymode();
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setttymode(1);
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}
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if (IC) {
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if (getty_chat(IC, CT, DC) > 0) {
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syslog(LOG_ERR, "modem init problem on %s", ttyn);
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(void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode);
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exit(1);
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}
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}
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if (AC) {
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fd_set rfds;
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struct timeval to;
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int i;
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FD_ZERO(&rfds);
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FD_SET(0, &rfds);
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to.tv_sec = RT;
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to.tv_usec = 0;
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i = select(32, &rfds, NULL, NULL, RT ? &to : NULL);
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if (i < 0) {
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syslog(LOG_ERR, "select %s: %m", ttyn);
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} else if (i == 0) {
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syslog(LOG_NOTICE, "recycle tty %s", ttyn);
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(void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode);
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exit(0); /* recycle for init */
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}
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i = getty_chat(AC, CT, DC);
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if (i > 0) {
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syslog(LOG_ERR, "modem answer problem on %s", ttyn);
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(void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode);
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exit(1);
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}
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} else { /* maybe blocking open */
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if (!opentty(ttyn, O_RDWR | (NC ? O_NONBLOCK : 0 )))
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exit(1);
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}
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}
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}
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defttymode();
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for (;;) {
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/*
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* if a delay was specified then sleep for that
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* number of seconds before writing the initial prompt
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*/
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if (first_sleep && DE) {
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sleep(DE);
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/* remove any noise */
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(void)tcflush(STDIN_FILENO, TCIOFLUSH);
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}
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first_sleep = 0;
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setttymode(0);
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if (AB) {
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tname = autobaud();
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dogettytab();
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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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dogettytab();
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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 this is the first time through this, and an
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issue file has been given, then send it */
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if (first_time && IF) {
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int fd;
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if ((fd = open(IF, O_RDONLY)) != -1) {
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char * cp;
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while ((cp = get_line(fd)) != NULL) {
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putf(cp);
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}
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close(fd);
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}
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}
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first_time = 0;
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if (IMP && *IMP && !(PL && PP))
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system(IMP);
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if (IM && *IM && !(PL && PP))
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putf(IM);
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if (setjmp(timeout)) {
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cfsetispeed(&tmode, B0);
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cfsetospeed(&tmode, B0);
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(void)tcsetattr(STDIN_FILENO, 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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rval = 0;
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if (AL) {
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const char *p = AL;
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char *q = name;
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while (*p && q < &name[sizeof name - 1]) {
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if (isupper(*p))
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upper = 1;
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else if (islower(*p))
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lower = 1;
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else if (isdigit(*p))
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digit = 1;
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*q++ = *p++;
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}
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} else if (!(PL && PP))
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rval = getname();
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if (rval == 2 || (PL && PP)) {
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oflush();
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alarm(0);
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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(PP, "ppplogin", ttyn, (char *) 0, env);
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syslog(LOG_ERR, "%s: %m", PP);
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exit(1);
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} else if (rval || AL) {
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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] == '\0')
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continue;
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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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if (AL) {
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syslog(LOG_ERR,
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"invalid auto-login name: %s", AL);
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exit(1);
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} else
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continue;
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}
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set_flags(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 REALLY_OLD_TTYS
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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(STDIN_FILENO, TCSANOW, &tmode) < 0) {
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syslog(LOG_ERR, "tcsetattr %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", AL ? "-fp" : "-p", name,
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(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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dogettytab();
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}
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}
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}
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static int
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opentty(const char *tty, int flags)
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{
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int failopenlogged = 0, i, saved_errno;
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while ((i = open(tty, flags)) == -1)
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{
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saved_errno = errno;
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if (!failopenlogged) {
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syslog(LOG_ERR, "open %s: %m", tty);
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failopenlogged = 1;
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}
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if (saved_errno == ENOENT)
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return 0;
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sleep(60);
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}
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if (login_tty(i) < 0) {
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if (daemon(0,0) < 0) {
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syslog(LOG_ERR,"daemon: %m");
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close(i);
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return 0;
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}
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if (login_tty(i) < 0) {
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syslog(LOG_ERR, "login_tty %s: %m", tty);
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close(i);
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return 0;
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}
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}
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return 1;
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}
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static void
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defttymode(void)
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{
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struct termios def;
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/* Start with default tty settings. */
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if (tcgetattr(STDIN_FILENO, &tmode) < 0) {
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syslog(LOG_ERR, "tcgetattr %s: %m", ttyn);
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exit(1);
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}
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omode = tmode; /* fill c_cc for dogettytab() */
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dogettytab();
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/*
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* Don't rely on the driver too much, and initialize crucial
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* things according to <sys/ttydefaults.h>. Avoid clobbering
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* the c_cc[] settings however, the console drivers might wish
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* to leave their idea of the preferred VERASE key value
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* there.
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*/
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cfmakesane(&def);
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tmode.c_iflag = def.c_iflag;
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tmode.c_oflag = def.c_oflag;
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tmode.c_lflag = def.c_lflag;
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tmode.c_cflag = def.c_cflag;
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if (NC)
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tmode.c_cflag |= CLOCAL;
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omode = tmode;
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}
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static void
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setttymode(int raw)
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{
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int off = 0;
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(void)tcflush(STDIN_FILENO, TCIOFLUSH); /* clear out the crap */
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ioctl(STDIN_FILENO, FIONBIO, &off); /* turn off non-blocking mode */
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ioctl(STDIN_FILENO, FIOASYNC, &off); /* ditto for async mode */
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if (IS)
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cfsetispeed(&tmode, speed(IS));
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else if (SP)
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cfsetispeed(&tmode, speed(SP));
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if (OS)
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cfsetospeed(&tmode, speed(OS));
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else if (SP)
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cfsetospeed(&tmode, speed(SP));
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set_flags(0);
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setchars();
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if (raw)
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cfmakeraw(&tmode);
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if (tcsetattr(STDIN_FILENO, TCSANOW, &tmode) < 0) {
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syslog(LOG_ERR, "tcsetattr %s: %m", ttyn);
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exit(1);
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}
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}
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static int
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getname(void)
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{
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int c;
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char *np;
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unsigned char cs;
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int ppp_state = 0;
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int ppp_connection = 0;
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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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|
}
|
|
signal(SIGINT, interrupt);
|
|
set_flags(1);
|
|
prompt();
|
|
oflush();
|
|
if (PF > 0) {
|
|
sleep(PF);
|
|
PF = 0;
|
|
}
|
|
if (tcsetattr(STDIN_FILENO, TCSANOW, &tmode) < 0) {
|
|
syslog(LOG_ERR, "%s: %m", ttyn);
|
|
exit(1);
|
|
}
|
|
crmod = digit = lower = upper = 0;
|
|
np = name;
|
|
for (;;) {
|
|
oflush();
|
|
if (read(STDIN_FILENO, &cs, 1) <= 0)
|
|
exit(0);
|
|
if ((c = cs&0177) == 0)
|
|
return (0);
|
|
|
|
/* PPP detection state machine..
|
|
Look for sequences:
|
|
PPP_FRAME, PPP_STATION, PPP_ESCAPE, PPP_CONTROL_ESCAPED or
|
|
PPP_FRAME, PPP_STATION, PPP_CONTROL (deviant from RFC)
|
|
See RFC1662.
|
|
Derived from code from Michael Hancock, <michaelh@cet.co.jp>
|
|
and Erik 'PPP' Olson, <eriko@wrq.com>
|
|
*/
|
|
|
|
if (PP && (cs == PPP_FRAME)) {
|
|
ppp_state = 1;
|
|
} else if (ppp_state == 1 && cs == PPP_STATION) {
|
|
ppp_state = 2;
|
|
} else if (ppp_state == 2 && cs == PPP_ESCAPE) {
|
|
ppp_state = 3;
|
|
} else if ((ppp_state == 2 && cs == PPP_CONTROL)
|
|
|| (ppp_state == 3 && cs == PPP_CONTROL_ESCAPED)) {
|
|
ppp_state = 4;
|
|
} else if (ppp_state == 4 && cs == PPP_LCP_HI) {
|
|
ppp_state = 5;
|
|
} else if (ppp_state == 5 && cs == PPP_LCP_LOW) {
|
|
ppp_connection = 1;
|
|
break;
|
|
} else {
|
|
ppp_state = 0;
|
|
}
|
|
|
|
if (c == EOT || c == CTRL('d'))
|
|
exit(0);
|
|
if (c == '\r' || c == '\n' || np >= &name[sizeof name-1]) {
|
|
putf("\r\n");
|
|
break;
|
|
}
|
|
if (islower(c))
|
|
lower = 1;
|
|
else if (isupper(c))
|
|
upper = 1;
|
|
else if (c == ERASE || c == '\b' || c == 0177) {
|
|
if (np > name) {
|
|
np--;
|
|
if (cfgetospeed(&tmode) >= 1200)
|
|
puts("\b \b");
|
|
else
|
|
putchr(cs);
|
|
}
|
|
continue;
|
|
} else if (c == KILL || c == CTRL('u')) {
|
|
putchr('\r');
|
|
if (cfgetospeed(&tmode) < 1200)
|
|
putchr('\n');
|
|
/* this is the way they do it down under ... */
|
|
else if (np > name)
|
|
puts(" \r");
|
|
prompt();
|
|
digit = lower = upper = 0;
|
|
np = name;
|
|
continue;
|
|
} else if (isdigit(c))
|
|
digit = 1;
|
|
if (IG && (c <= ' ' || c > 0176))
|
|
continue;
|
|
*np++ = c;
|
|
putchr(cs);
|
|
}
|
|
signal(SIGINT, SIG_IGN);
|
|
*np = 0;
|
|
if (c == '\r')
|
|
crmod = 1;
|
|
if ((upper && !lower && !LC) || UC)
|
|
for (np = name; *np; np++)
|
|
if (isupper(*np))
|
|
*np = tolower(*np);
|
|
return (1 + ppp_connection);
|
|
}
|
|
|
|
static void
|
|
putpad(const char *s)
|
|
{
|
|
int pad = 0;
|
|
speed_t ospeed = cfgetospeed(&tmode);
|
|
|
|
if (isdigit(*s)) {
|
|
while (isdigit(*s)) {
|
|
pad *= 10;
|
|
pad += *s++ - '0';
|
|
}
|
|
pad *= 10;
|
|
if (*s == '.' && isdigit(s[1])) {
|
|
pad += s[1] - '0';
|
|
s += 2;
|
|
}
|
|
}
|
|
|
|
puts(s);
|
|
/*
|
|
* If no delay needed, or output speed is
|
|
* not comprehensible, then don't try to delay.
|
|
*/
|
|
if (pad == 0 || ospeed <= 0)
|
|
return;
|
|
|
|
/*
|
|
* Round up by a half a character frame, and then do the delay.
|
|
* Too bad there are no user program accessible programmed delays.
|
|
* Transmitting pad characters slows many terminals down and also
|
|
* loads the system.
|
|
*/
|
|
pad = (pad * ospeed + 50000) / 100000;
|
|
while (pad--)
|
|
putchr(*PC);
|
|
}
|
|
|
|
static void
|
|
puts(const char *s)
|
|
{
|
|
while (*s)
|
|
putchr(*s++);
|
|
}
|
|
|
|
static char outbuf[OBUFSIZ];
|
|
static int obufcnt = 0;
|
|
|
|
static void
|
|
putchr(int cc)
|
|
{
|
|
char c;
|
|
|
|
c = cc;
|
|
if (!NP) {
|
|
c |= partab[c&0177] & 0200;
|
|
if (OP)
|
|
c ^= 0200;
|
|
}
|
|
if (!UB) {
|
|
outbuf[obufcnt++] = c;
|
|
if (obufcnt >= OBUFSIZ)
|
|
oflush();
|
|
} else
|
|
write(STDOUT_FILENO, &c, 1);
|
|
}
|
|
|
|
static void
|
|
oflush(void)
|
|
{
|
|
if (obufcnt)
|
|
write(STDOUT_FILENO, outbuf, obufcnt);
|
|
obufcnt = 0;
|
|
}
|
|
|
|
static void
|
|
prompt(void)
|
|
{
|
|
|
|
putf(LM);
|
|
if (CO)
|
|
putchr('\n');
|
|
}
|
|
|
|
|
|
static char *
|
|
get_line(int fd)
|
|
{
|
|
size_t i = 0;
|
|
static char linebuf[512];
|
|
|
|
/*
|
|
* This is certainly slow, but it avoids having to include
|
|
* stdio.h unnecessarily. Issue files should be small anyway.
|
|
*/
|
|
while (i < (sizeof linebuf - 3) && read(fd, linebuf+i, 1)==1) {
|
|
if (linebuf[i] == '\n') {
|
|
/* Don't rely on newline mode, assume raw */
|
|
linebuf[i++] = '\r';
|
|
linebuf[i++] = '\n';
|
|
linebuf[i] = '\0';
|
|
return linebuf;
|
|
}
|
|
++i;
|
|
}
|
|
linebuf[i] = '\0';
|
|
return i ? linebuf : 0;
|
|
}
|
|
|
|
static void
|
|
putf(const char *cp)
|
|
{
|
|
time_t t;
|
|
char db[100];
|
|
const char *slash;
|
|
|
|
static struct utsname kerninfo;
|
|
|
|
if (!*kerninfo.sysname)
|
|
uname(&kerninfo);
|
|
|
|
while (*cp) {
|
|
if (*cp != '%') {
|
|
putchr(*cp++);
|
|
continue;
|
|
}
|
|
switch (*++cp) {
|
|
|
|
case 't':
|
|
slash = strrchr(ttyn, '/');
|
|
if (slash == (char *) 0)
|
|
puts(ttyn);
|
|
else
|
|
puts(&slash[1]);
|
|
break;
|
|
|
|
case 'h':
|
|
puts(editedhost);
|
|
break;
|
|
|
|
case 'd': {
|
|
t = (time_t)0;
|
|
(void)time(&t);
|
|
if (Lo)
|
|
(void)setlocale(LC_TIME, Lo);
|
|
(void)strftime(db, sizeof(db), DF, localtime(&t));
|
|
puts(db);
|
|
break;
|
|
|
|
case 's':
|
|
puts(kerninfo.sysname);
|
|
break;
|
|
|
|
case 'm':
|
|
puts(kerninfo.machine);
|
|
break;
|
|
|
|
case 'r':
|
|
puts(kerninfo.release);
|
|
break;
|
|
|
|
case 'v':
|
|
puts(kerninfo.version);
|
|
break;
|
|
}
|
|
|
|
case '%':
|
|
putchr('%');
|
|
break;
|
|
}
|
|
cp++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Read a gettytab database entry and perform necessary quirks.
|
|
*/
|
|
static void
|
|
dogettytab(void)
|
|
{
|
|
|
|
/* Read the database entry. */
|
|
gettable(tname, tabent);
|
|
|
|
/*
|
|
* Avoid inheriting the parity values from the default entry
|
|
* if any of them is set in the current entry.
|
|
* Mixing different parity settings is unreasonable.
|
|
*/
|
|
if (OPset || EPset || APset || NPset)
|
|
OPset = EPset = APset = NPset = 1;
|
|
|
|
/* Fill in default values for unset capabilities. */
|
|
setdefaults();
|
|
}
|