735 lines
16 KiB
C
735 lines
16 KiB
C
/* $NetBSD: main.c,v 1.50 2005/12/28 09:43:05 christos Exp $ */
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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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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) 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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#else
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__RCSID("$NetBSD: main.c,v 1.50 2005/12/28 09:43:05 christos Exp $");
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#endif
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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 <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 <pwd.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 <util.h>
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#include <limits.h>
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#include <ttyent.h>
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#include <termcap.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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extern char **environ;
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extern char editedhost[];
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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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/* 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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struct termios tmode, omode;
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int crmod, digit, lower, upper;
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char hostname[MAXHOSTNAMELEN + 1];
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struct utsname kerninfo;
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char name[LOGIN_NAME_MAX];
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char dev[] = _PATH_DEV;
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char ttyn[32];
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char lockfile[512];
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uid_t ttyowner;
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char *rawttyn;
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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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const 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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static void clearscreen(void);
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jmp_buf timeout;
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static void
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dingdong(int signo)
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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(int signo)
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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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static void
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timeoverrun(int signo)
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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 main(int, char *[]);
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static int getname(void);
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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 xputs(const char *);
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int
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main(int argc, char *argv[])
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{
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const char *progname;
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char *tname;
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int repcnt = 0, failopenlogged = 0, uugetty = 0, first_time = 1;
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struct rlimit limit;
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struct passwd *pw;
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int rval;
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#ifdef __GNUC__
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(void)&tname; /* XXX gcc -Wall */
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#endif
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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_PID, LOG_AUTH);
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gethostname(hostname, sizeof(hostname));
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hostname[sizeof(hostname) - 1] = '\0';
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if (hostname[0] == '\0')
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strlcpy(hostname, "Amnesiac", sizeof(hostname));
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uname(&kerninfo);
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progname = getprogname();
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if (progname[0] == 'u' && progname[1] == 'u')
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uugetty = 1;
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/*
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* Find id of uucp login (if present) so we can chown tty properly.
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*/
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if (uugetty && (pw = getpwnam("uucp")))
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ttyowner = pw->pw_uid;
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else
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ttyowner = 0;
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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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strlcpy(ttyn, ttyname(0), sizeof(ttyn));
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}
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else {
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int i;
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rawttyn = argv[2];
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strlcpy(ttyn, dev, sizeof(ttyn));
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strlcat(ttyn, argv[2], sizeof(ttyn));
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if (uugetty) {
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chown(ttyn, ttyowner, 0);
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strlcpy(lockfile, _PATH_LOCK, sizeof(lockfile));
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strlcat(lockfile, argv[2], sizeof(lockfile));
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/* wait for lockfiles to go away before we try to open */
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if ( pidlock(lockfile, 0, 0, 0) != 0 ) {
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syslog(LOG_ERR, "%s: can't create lockfile", ttyn);
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exit(1);
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}
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unlink(lockfile);
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}
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if (strcmp(argv[0], "+") != 0) {
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chown(ttyn, ttyowner, 0);
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chmod(ttyn, 0600);
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revoke(ttyn);
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if (ttyaction(ttyn, "getty", "root"))
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syslog(LOG_WARNING, "%s: ttyaction failed", 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_WARNING, "%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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if (uugetty && pidlock(lockfile, 0, 0, 0) != 0) {
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syslog(LOG_ERR, "%s: can't create lockfile", ttyn);
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exit(1);
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}
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if (uugetty)
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(void) chown(lockfile, ttyowner, 0);
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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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rval = 0;
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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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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 (CS)
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clearscreen();
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if (CL && *CL)
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putpad(CL);
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edithost(HE);
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/*
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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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*/
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if (first_time != 0 && IF != NULL) {
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char buf[_POSIX2_LINE_MAX];
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FILE *fd;
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if ((fd = fopen(IF, "r")) != NULL) {
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while (fgets(buf, sizeof(buf) - 1, fd) != NULL)
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putf(buf);
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fclose(fd);
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}
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}
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first_time = 0;
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if (IM && *IM)
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putf(IM);
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oflush();
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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 (NN) {
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name[0] = '\0';
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lower = 1;
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upper = digit = 0;
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} else 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((unsigned char)*p))
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upper = 1;
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else if (islower((unsigned char)*p))
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lower = 1;
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else if (isdigit((unsigned char)*p))
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digit++;
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*q++ = *p++;
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}
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} else if ((rval = getname()) == 2) {
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setflags(2);
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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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}
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if (rval || AL || NN) {
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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] == '-') {
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xputs("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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if (NN)
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execle(LO, "login", AL ? "-fp" : "-p",
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NULL, env);
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else
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execle(LO, "login", AL ? "-fp" : "-p",
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"--", name, NULL, 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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if (uugetty)
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unlink(lockfile);
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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, ppp_connection;
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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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ppp_state = ppp_connection = 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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/*
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* PPP detection state machine..
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* Look for sequences:
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* PPP_FRAME, PPP_STATION, PPP_ESCAPE, PPP_CONTROL_ESCAPED or
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* PPP_FRAME, PPP_STATION, PPP_CONTROL (deviant from RFC)
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* See RFC1662.
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* Derived from code from Michael Hancock <michaelh@cet.co.jp>
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* and Erik 'PPP' Olson <eriko@wrq.com>
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*/
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if (PP && cs == PPP_FRAME) {
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ppp_state = 1;
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} else if (ppp_state == 1 && cs == PPP_STATION) {
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ppp_state = 2;
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} else if (ppp_state == 2 && cs == PPP_ESCAPE) {
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ppp_state = 3;
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} else if ((ppp_state == 2 && cs == PPP_CONTROL) ||
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(ppp_state == 3 && cs == PPP_CONTROL_ESCAPED)) {
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ppp_state = 4;
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} else if (ppp_state == 4 && cs == PPP_LCP_HI) {
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ppp_state = 5;
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} else if (ppp_state == 5 && cs == PPP_LCP_LOW) {
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ppp_connection = 1;
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break;
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} else {
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ppp_state = 0;
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}
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if (c == EOT)
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exit(1);
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if (c == '\r' || c == '\n' ||
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np >= &name[LOGIN_NAME_MAX - 1]) {
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*np = '\0';
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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') {
|
|
if (np > name) {
|
|
np--;
|
|
if (cfgetospeed(&tmode) >= 1200)
|
|
xputs("\b \b");
|
|
else
|
|
putchr(cs);
|
|
}
|
|
continue;
|
|
} else if (c == KILL || c == '@') {
|
|
putchr(cs);
|
|
putchr('\r');
|
|
if (cfgetospeed(&tmode) < 1200)
|
|
putchr('\n');
|
|
/* this is the way they do it down under ... */
|
|
else if (np > name)
|
|
xputs(
|
|
" \r");
|
|
prompt();
|
|
np = name;
|
|
continue;
|
|
} else if (isdigit(c))
|
|
digit++;
|
|
if (IG && (c <= ' ' || c > 0176))
|
|
continue;
|
|
*np++ = c;
|
|
putchr(cs);
|
|
|
|
/*
|
|
* An MS-Windows direct connect PPP "client" won't send its
|
|
* first PPP packet until we respond to its "CLIENT" poll
|
|
* with a CRLF sequence. We cater to yet another broken
|
|
* implementation of a previously-standard protocol...
|
|
*/
|
|
*np = '\0';
|
|
if (strstr(name, "CLIENT"))
|
|
putf("\r\n");
|
|
}
|
|
signal(SIGINT, SIG_IGN);
|
|
*np = 0;
|
|
if (c == '\r')
|
|
crmod = 1;
|
|
if ((upper && !lower && !LC) || UC)
|
|
for (np = name; *np; np++)
|
|
*np = tolower((unsigned char)*np);
|
|
return (1 + ppp_connection);
|
|
}
|
|
|
|
static void
|
|
putpad(const char *s)
|
|
{
|
|
int pad = 0;
|
|
speed_t ospeed = cfgetospeed(&tmode);
|
|
|
|
if (isdigit((unsigned char)*s)) {
|
|
while (isdigit((unsigned char)*s)) {
|
|
pad *= 10;
|
|
pad += *s++ - '0';
|
|
}
|
|
pad *= 10;
|
|
if (*s == '.' && isdigit((unsigned char)s[1])) {
|
|
pad += s[1] - '0';
|
|
s += 2;
|
|
}
|
|
}
|
|
|
|
xputs(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
|
|
xputs(const char *s)
|
|
{
|
|
while (*s)
|
|
putchr(*s++);
|
|
}
|
|
|
|
char outbuf[OBUFSIZ];
|
|
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 void
|
|
putf(const char *cp)
|
|
{
|
|
time_t t;
|
|
char *slash, db[100];
|
|
|
|
while (*cp) {
|
|
if (*cp != '%') {
|
|
putchr(*cp++);
|
|
continue;
|
|
}
|
|
switch (*++cp) {
|
|
|
|
case 't':
|
|
if ((slash = strstr(ttyn, "/pts/")) == NULL)
|
|
slash = strrchr(ttyn, '/');
|
|
if (slash == NULL)
|
|
xputs(ttyn);
|
|
else
|
|
xputs(&slash[1]);
|
|
break;
|
|
|
|
case 'h':
|
|
xputs(editedhost);
|
|
break;
|
|
|
|
case 'd':
|
|
(void)time(&t);
|
|
(void)strftime(db, sizeof(db),
|
|
/* SCCS eats %M% */
|
|
"%l:%M" "%p on %A, %d %B %Y", localtime(&t));
|
|
xputs(db);
|
|
break;
|
|
|
|
case 's':
|
|
xputs(kerninfo.sysname);
|
|
break;
|
|
|
|
case 'm':
|
|
xputs(kerninfo.machine);
|
|
break;
|
|
|
|
case 'r':
|
|
xputs(kerninfo.release);
|
|
break;
|
|
|
|
case 'v':
|
|
xputs(kerninfo.version);
|
|
break;
|
|
|
|
case '%':
|
|
putchr('%');
|
|
break;
|
|
}
|
|
if (*cp)
|
|
cp++;
|
|
}
|
|
}
|
|
|
|
static void
|
|
clearscreen(void)
|
|
{
|
|
struct ttyent *typ;
|
|
struct tinfo *tinfo;
|
|
char *cs;
|
|
|
|
if (rawttyn == NULL)
|
|
return;
|
|
|
|
typ = getttynam(rawttyn);
|
|
|
|
if ((typ == NULL) || (typ->ty_type == NULL) ||
|
|
(typ->ty_type[0] == 0))
|
|
return;
|
|
|
|
if (t_getent(&tinfo, typ->ty_type) <= 0)
|
|
return;
|
|
|
|
cs = t_agetstr(tinfo, "cl");
|
|
if (cs == NULL)
|
|
return;
|
|
|
|
putpad(cs);
|
|
}
|