Imported from util-linux-2.2 tarball.

1 files changed, 1099 insertions, 0 deletions

diff --git a/login-utils/agetty.c b/login-utils/agetty.c
new file mode 100644
index 000000000..a8cd45db8
--- /dev/null
+++ b/login-utils/agetty.c
@@ -0,0 +1,1099 @@
+/* agetty.c - another getty program for Linux. By W. Z. Venema 1989
+   Ported to Linux by Peter Orbaek <poe@daimi.aau.dk>
+   This program is freely distributable. The entire man-page used to
+   be here. Now read the real man-page agetty.8 instead.
+*/
+
+#ifndef	lint
+char sccsid[] = "@(#) agetty.c 1.29 9/1/91 23:22:00";
+#endif
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#include <termio.h>
+#include <signal.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <varargs.h>
+#include <ctype.h>
+#include <utmp.h>
+#include <getopt.h>
+#include <memory.h>
+#include <sys/file.h>
+
+#ifdef linux
+#include "pathnames.h"
+#include <sys/param.h>
+#define USE_SYSLOG
+#endif
+
+ /* If USE_SYSLOG is undefined all diagnostics go directly to /dev/console. */
+
+#ifdef	USE_SYSLOG
+#include <syslog.h>
+extern void closelog();
+#endif
+
+ /*
+  * Some heuristics to find out what environment we are in: if it is not
+  * System V, assume it is SunOS 4.
+  */
+
+#ifdef LOGIN_PROCESS			/* defined in System V utmp.h */
+#define	SYSV_STYLE			/* select System V style getty */
+#endif
+
+ /*
+  * Things you may want to modify.
+  * 
+  * If ISSUE is not defined, agetty will never display the contents of the
+  * /etc/issue file. You will not want to spit out large "issue" files at the
+  * wrong baud rate. Relevant for System V only.
+  * 
+  * You may disagree with the default line-editing etc. characters defined
+  * below. Note, however, that DEL cannot be used for interrupt generation
+  * and for line editing at the same time.
+  */
+
+#ifdef	SYSV_STYLE
+#define	ISSUE "/etc/issue"		/* displayed before the login prompt */
+#include <sys/utsname.h>
+#include <time.h>
+#endif
+
+#define LOGIN " login: "		/* login prompt */
+
+/* Some shorthands for control characters. */
+
+#define CTL(x)		(x ^ 0100)	/* Assumes ASCII dialect */
+#define	CR		CTL('M')	/* carriage return */
+#define	NL		CTL('J')	/* line feed */
+#define	BS		CTL('H')	/* back space */
+#define	DEL		CTL('?')	/* delete */
+
+/* Defaults for line-editing etc. characters; you may want to change this. */
+
+#define DEF_ERASE	DEL		/* default erase character */
+#define DEF_INTR	CTL('C')	/* default interrupt character */
+#define DEF_QUIT	CTL('\\')	/* default quit char */
+#define DEF_KILL	CTL('U')	/* default kill char */
+#define DEF_EOF		CTL('D')	/* default EOF char */
+#define DEF_EOL		0
+#define DEF_SWITCH	0		/* default switch char */
+
+ /*
+  * SunOS 4.1.1 termio is broken. We must use the termios stuff instead,
+  * because the termio -> termios translation does not clear the termios
+  * CIBAUD bits. Therefore, the tty driver would sometimes report that input
+  * baud rate != output baud rate. I did not notice that problem with SunOS
+  * 4.1. We will use termios where available, and termio otherwise.
+  */
+
+/* linux 0.12 termio is broken too, if we use it c_cc[VERASE] isn't set
+   properly, but all is well if we use termios?! */
+
+#ifdef	TCGETS
+#undef	TCGETA
+#undef	TCSETA
+#undef	TCSETAW
+#define	termio	termios
+#define	TCGETA	TCGETS
+#define	TCSETA	TCSETS
+#define	TCSETAW	TCSETSW
+#endif
+
+ /*
+  * This program tries to not use the standard-i/o library.  This keeps the
+  * executable small on systems that do not have shared libraries (System V
+  * Release <3).
+  */
+
+#define	BUFSIZ		1024
+
+ /*
+  * When multiple baud rates are specified on the command line, the first one
+  * we will try is the first one specified.
+  */
+
+#define	FIRST_SPEED	0
+
+/* Storage for command-line options. */
+
+#define	MAX_SPEED	10		/* max. nr. of baud rates */
+
+struct options {
+    int     flags;			/* toggle switches, see below */
+    int     timeout;			/* time-out period */
+    char   *login;			/* login program */
+    int     numspeed;			/* number of baud rates to try */
+    int     speeds[MAX_SPEED];		/* baud rates to be tried */
+    char   *tty;			/* name of tty */
+};
+
+#define	F_PARSE		(1<<0)		/* process modem status messages */
+#define	F_ISSUE		(1<<1)		/* display /etc/issue */
+#define	F_RTSCTS	(1<<2)		/* enable RTS/CTS flow control */
+#define F_LOCAL		(1<<3)		/* force local */
+
+/* Storage for things detected while the login name was read. */
+
+struct chardata {
+    int     erase;			/* erase character */
+    int     kill;			/* kill character */
+    int     eol;			/* end-of-line character */
+    int     parity;			/* what parity did we see */
+    int     capslock;			/* upper case without lower case */
+};
+
+/* Initial values for the above. */
+
+struct chardata init_chardata = {
+    DEF_ERASE,				/* default erase character */
+    DEF_KILL,				/* default kill character */
+    0,					/* always filled in at runtime */
+    0,					/* space parity */
+    0,					/* always filled in at runtime */
+};
+
+#define P_(s) ()
+void parse_args P_((int argc, char **argv, struct options *op));
+void parse_speeds P_((struct options *op, char *arg));
+void update_utmp P_((char *line));
+void open_tty P_((char *tty, struct termio *tp, int local));
+void termio_init P_((struct termio *tp, int speed, int local));
+void auto_baud P_((struct termio *tp));
+void do_prompt P_((struct options *op, struct termio *tp));
+void next_speed P_((struct termio *tp, struct options *op));
+char *get_logname P_((struct options *op, struct chardata *cp, struct termio *tp));
+void termio_final P_((struct options *op, struct termio *tp, struct chardata *cp));
+int caps_lock P_((char *s));
+int bcode P_((char *s));
+void usage P_((void));
+void error P_((int va_alist));
+#undef P_
+
+/* The following is used for understandable diagnostics. */
+
+char *progname;
+
+/* ... */
+#ifdef DEBUGGING
+#define debug(s) fprintf(dbf,s); fflush(dbf)
+FILE *dbf;
+#else
+#define debug(s) /* nothing */
+#endif
+
+int
+main(argc, argv)
+     int     argc;
+     char  **argv;
+{
+    char   *logname;			/* login name, given to /bin/login */
+    char   *get_logname();
+    struct chardata chardata;		/* set by get_logname() */
+    struct termio termio;		/* terminal mode bits */
+    static struct options options = {
+	F_ISSUE,			/* show /etc/issue (SYSV_STYLE) */
+	0,				/* no timeout */
+	_PATH_LOGIN,			/* default login program */
+	0,				/* no baud rates known yet */
+    };
+
+    /* The BSD-style init command passes us a useless process name. */
+
+#ifdef	SYSV_STYLE
+    progname = argv[0];
+#else
+    progname = "agetty";
+#endif
+
+#ifdef DEBUGGING
+	dbf = fopen("/dev/tty1", "w");
+
+	{	int i;
+	
+		for(i = 1; i < argc; i++) {
+			debug(argv[i]);
+		}
+	}
+#endif
+
+    /* Parse command-line arguments. */
+
+    parse_args(argc, argv, &options);
+
+#ifdef linux
+	setsid();
+#endif
+	
+    /* Update the utmp file. */
+
+#ifdef	SYSV_STYLE
+    update_utmp(options.tty);
+#endif
+
+    /* Open the tty as standard { input, output, error }. */
+    open_tty(options.tty, &termio, options.flags & F_LOCAL);
+
+#ifdef linux
+	{
+		int iv;
+		
+		iv = getpid();
+		(void) ioctl(0, TIOCSPGRP, &iv);
+	}
+#endif
+    /* Initialize the termio settings (raw mode, eight-bit, blocking i/o). */
+
+    termio_init(&termio, options.speeds[FIRST_SPEED], options.flags & F_LOCAL);
+	
+    /* Optionally detect the baud rate from the modem status message. */
+
+    if (options.flags & F_PARSE)
+	auto_baud(&termio);
+
+    /* Set the optional timer. */
+
+    if (options.timeout)
+	(void) alarm((unsigned) options.timeout);
+ 
+    /* Read the login name. */
+
+    while ((logname = get_logname(&options, &chardata, &termio)) == 0)
+	next_speed(&termio, &options);
+
+    /* Disable timer. */
+
+    if (options.timeout)
+	(void) alarm(0);
+
+    /* Finalize the termio settings. */
+
+    termio_final(&options, &termio, &chardata);
+
+    /* Now the newline character should be properly written. */
+
+    (void) write(1, "\n", 1);
+
+    /* Let the login program take care of password validation. */
+
+    (void) execl(options.login, options.login, "--", logname, (char *) 0);
+    error("%s: can't exec %s: %m", options.tty, options.login);
+    exit(0);  /* quiet GCC */
+}
+
+/* parse-args - parse command-line arguments */
+
+void
+parse_args(argc, argv, op)
+     int     argc;
+     char  **argv;
+     struct options *op;
+{
+    extern char *optarg;		/* getopt */
+    extern int optind;			/* getopt */
+    int     c;
+
+    while (isascii(c = getopt(argc, argv, "Lhil:mt:"))) {
+	switch (c) {
+	case 'L':				/* force local */
+ 	    op->flags |= F_LOCAL;
+ 	    break;
+	case 'h':				/* enable h/w flow control */
+	    op->flags |= F_RTSCTS;
+	    break;
+	case 'i':				/* do not show /etc/issue */
+	    op->flags &= ~F_ISSUE;
+	    break;
+	case 'l':
+	    op->login = optarg;			/* non-default login program */
+	    break;
+	case 'm':				/* parse modem status message */
+	    op->flags |= F_PARSE;
+	    break;
+	case 't':				/* time out */
+	    if ((op->timeout = atoi(optarg)) <= 0)
+		error("bad timeout value: %s", optarg);
+	    break;
+	default:
+	    usage();
+	}
+    }
+ 	debug("after getopt loop\n");
+    if (argc < optind + 2)			/* check parameter count */
+	usage();
+
+    /* we loosen up a bit and accept both "baudrate tty" and "tty baudrate" */
+    if('0' <= argv[optind][0] && argv[optind][0] <= '9') {
+	/* a number first, assume it's a speed (BSD style) */
+	parse_speeds(op, argv[optind++]);	/* baud rate(s) */
+	op->tty = argv[optind];			/* tty name */
+    } else {
+	op->tty = argv[optind++];		/* tty name */
+	parse_speeds(op, argv[optind]);		/* baud rate(s) */
+    }
+
+    optind++;
+    if (argc > optind && argv[optind])
+	setenv ("TERM", argv[optind], 1);
+
+    debug("exiting parseargs\n");
+}
+
+/* parse_speeds - parse alternate baud rates */
+
+void
+parse_speeds(op, arg)
+     struct options *op;
+     char   *arg;
+{
+    char   *strtok();
+    char   *cp;
+
+	debug("entered parse_speeds\n");
+    for (cp = strtok(arg, ","); cp != 0; cp = strtok((char *) 0, ",")) {
+	if ((op->speeds[op->numspeed++] = bcode(cp)) <= 0)
+	    error("bad speed: %s", cp);
+	if (op->numspeed > MAX_SPEED)
+	    error("too many alternate speeds");
+    }
+    debug("exiting parsespeeds\n");
+}
+
+#ifdef	SYSV_STYLE
+
+/* update_utmp - update our utmp entry */
+void
+update_utmp(line)
+     char   *line;
+{
+    struct utmp ut;
+    long    ut_size = sizeof(ut);	/* avoid nonsense */
+    int     ut_fd;
+    int     mypid = getpid();
+    long    time();
+    long    lseek();
+    char   *strncpy();
+
+    /*
+     * The utmp file holds miscellaneous information about things started by
+     * /etc/init and other system-related events. Our purpose is to update
+     * the utmp entry for the current process, in particular the process type
+     * and the tty line we are listening to. Return successfully only if the
+     * utmp file can be opened for update, and if we are able to find our
+     * entry in the utmp file.
+     */
+
+#ifdef linux
+	utmpname(_PATH_UTMP);
+        memset(&ut, 0, sizeof(ut));
+	(void) strncpy(ut.ut_user, "LOGIN", sizeof(ut.ut_user));
+	(void) strncpy(ut.ut_line, line, sizeof(ut.ut_line));
+	(void) strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id));
+	(void) time(&ut.ut_time);
+	ut.ut_type = LOGIN_PROCESS;
+	ut.ut_pid = mypid;
+
+	pututline(&ut);
+	endutent();
+
+        if((ut_fd = open(_PATH_WTMP, O_APPEND|O_WRONLY)) >= 0) {
+	    flock(ut_fd, LOCK_EX);
+	    write(ut_fd, &ut, sizeof(ut));
+	    flock(ut_fd, LOCK_UN);
+	    close(ut_fd);
+	}
+#else
+    if ((ut_fd = open(UTMP_FILE, 2)) < 0) {
+	error("%s: open for update: %m", UTMP_FILE);
+    } else {
+	while (read(ut_fd, (char *) &ut, sizeof(ut)) == sizeof(ut)) {
+	    if (ut.ut_type == INIT_PROCESS && ut.ut_pid == mypid) {
+		ut.ut_type = LOGIN_PROCESS;
+		ut.ut_time = time((long *) 0);
+		(void) strncpy(ut.ut_name, "LOGIN", sizeof(ut.ut_name));
+		(void) strncpy(ut.ut_line, line, sizeof(ut.ut_line));
+		(void) lseek(ut_fd, -ut_size, 1);
+		(void) write(ut_fd, (char *) &ut, sizeof(ut));
+		(void) close(ut_fd);
+		return;
+	    }
+	}
+	error("%s: no utmp entry", line);
+    }
+#endif /* linux */
+}
+
+#endif
+
+/* open_tty - set up tty as standard { input, output, error } */
+void
+open_tty(tty, tp, local)
+     char   *tty;
+     struct termio *tp;
+     int    local;
+{
+    /* Get rid of the present standard { output, error} if any. */
+
+    (void) close(1);
+    (void) close(2);
+    errno = 0;					/* ignore above errors */
+
+    /* Set up new standard input, unless we are given an already opened port. */
+
+    if (strcmp(tty, "-")) {
+	struct stat st;
+
+	/* Sanity checks... */
+
+	if (chdir("/dev"))
+	    error("/dev: chdir() failed: %m");
+	if (stat(tty, &st) < 0)
+	    error("/dev/%s: %m", tty);
+	if ((st.st_mode & S_IFMT) != S_IFCHR)
+	    error("/dev/%s: not a character device", tty);
+
+	/* Open the tty as standard input. */
+
+	(void) close(0);
+	errno = 0;				/* ignore close(2) errors */
+
+	if (open(tty, (local ? O_RDWR|O_NONBLOCK : O_RDWR), 0) != 0)
+	    error("/dev/%s: cannot open as standard input: %m", tty);
+
+    } else {
+
+	/*
+	 * Standard input should already be connected to an open port. Make
+	 * sure it is open for read/write.
+	 */
+
+	if ((fcntl(0, F_GETFL, 0) & O_RDWR) != O_RDWR)
+	    error("%s: not open for read/write", tty);
+    }
+
+    /* Set up standard output and standard error file descriptors. */
+
+    if (dup(0) != 1 || dup(0) != 2)		/* set up stdout and stderr */
+	error("%s: dup problem: %m", tty);	/* we have a problem */
+
+    /*
+     * The following ioctl will fail if stdin is not a tty, but also when
+     * there is noise on the modem control lines. In the latter case, the
+     * common course of action is (1) fix your cables (2) give the modem more
+     * time to properly reset after hanging up. SunOS users can achieve (2)
+     * by patching the SunOS kernel variable "zsadtrlow" to a larger value;
+     * 5 seconds seems to be a good value.
+     */
+
+    if (ioctl(0, TCGETA, tp) < 0)
+	error("%s: ioctl: %m", tty);
+
+    /*
+     * It seems to be a terminal. Set proper protections and ownership. Mode
+     * 0622 is suitable for SYSV <4 because /bin/login does not change
+     * protections. SunOS 4 login will change the protections to 0620 (write
+     * access for group tty) after the login has succeeded.
+     */
+
+    (void) chown(tty, 0, 0);			/* root, sys */
+    (void) chmod(tty, 0622);			/* crw--w--w- */
+    errno = 0;					/* ignore above errors */
+}
+
+/* termio_init - initialize termio settings */
+
+char gbuf[1024];
+char area[1024];
+
+void
+termio_init(tp, speed, local)
+     struct termio *tp;
+     int     speed;
+     int	local;
+{
+
+    /*
+     * Initial termio settings: 8-bit characters, raw-mode, blocking i/o.
+     * Special characters are set after we have read the login name; all
+     * reads will be done in raw mode anyway. Errors will be dealt with
+     * lateron.
+     */
+#ifdef linux
+	/* flush input and output queues, important for modems! */
+	(void) ioctl(0, TCFLSH, 2);
+#endif
+
+    tp->c_cflag = CS8 | HUPCL | CREAD | speed;
+    if (local) {
+	tp->c_cflag |= CLOCAL;
+    }
+
+    tp->c_iflag = tp->c_lflag = tp->c_oflag = tp->c_line = 0;
+    tp->c_cc[VMIN] = 1;
+    tp->c_cc[VTIME] = 0;
+    (void) ioctl(0, TCSETA, tp);
+    if (local) {
+	(void) fcntl(0, F_SETFL, fcntl(0, F_GETFL, 0) & ~O_NDELAY);
+    }
+    debug("term_io 2\n");
+}
+
+/* auto_baud - extract baud rate from modem status message */
+void
+auto_baud(tp)
+     struct termio *tp;
+{
+    int     speed;
+    int     vmin;
+    unsigned iflag;
+    char    buf[BUFSIZ];
+    char   *bp;
+    int     nread;
+
+    /*
+     * This works only if the modem produces its status code AFTER raising
+     * the DCD line, and if the computer is fast enough to set the proper
+     * baud rate before the message has gone by. We expect a message of the
+     * following format:
+     * 
+     * <junk><number><junk>
+     * 
+     * The number is interpreted as the baud rate of the incoming call. If the
+     * modem does not tell us the baud rate within one second, we will keep
+     * using the current baud rate. It is advisable to enable BREAK
+     * processing (comma-separated list of baud rates) if the processing of
+     * modem status messages is enabled.
+     */
+
+    /*
+     * Use 7-bit characters, don't block if input queue is empty. Errors will
+     * be dealt with lateron.
+     */
+
+    iflag = tp->c_iflag;
+    tp->c_iflag |= ISTRIP;			/* enable 8th-bit stripping */
+    vmin = tp->c_cc[VMIN];
+    tp->c_cc[VMIN] = 0;				/* don't block if queue empty */
+    (void) ioctl(0, TCSETA, tp);
+
+    /*
+     * Wait for a while, then read everything the modem has said so far and
+     * try to extract the speed of the dial-in call.
+     */
+
+    (void) sleep(1);
+    if ((nread = read(0, buf, sizeof(buf) - 1)) > 0) {
+	buf[nread] = '\0';
+	for (bp = buf; bp < buf + nread; bp++) {
+	    if (isascii(*bp) && isdigit(*bp)) {
+		if (speed = bcode(bp)) {
+		    tp->c_cflag &= ~CBAUD;
+		    tp->c_cflag |= speed;
+		}
+		break;
+	    }
+	}
+    }
+    /* Restore terminal settings. Errors will be dealt with lateron. */
+
+    tp->c_iflag = iflag;
+    tp->c_cc[VMIN] = vmin;
+    (void) ioctl(0, TCSETA, tp);
+}
+
+/* do_prompt - show login prompt, optionally preceded by /etc/issue contents */
+void
+do_prompt(op, tp)
+     struct options *op;
+     struct termio *tp;
+{
+#ifdef	ISSUE
+    FILE    *fd;
+    int     oflag;
+    char    c;
+    struct utsname uts;
+
+    (void) uname(&uts);
+#endif
+
+    (void) write(1, "\r\n", 2);			/* start a new line */
+#ifdef	ISSUE					/* optional: show /etc/issue */
+    if ((op->flags & F_ISSUE) && (fd = fopen(ISSUE, "r"))) {
+	oflag = tp->c_oflag;			/* save current setting */
+	tp->c_oflag |= (ONLCR | OPOST);		/* map NL in output to CR-NL */
+	(void) ioctl(0, TCSETAW, tp);
+
+
+	while ((c = getc(fd)) != EOF)
+	{
+	    if (c == '\\')
+	      {
+		c = getc(fd);
+		
+		switch (c)
+		  {
+		  case 's':
+		    (void) printf ("%s", uts.sysname);
+		    break;
+		    
+		  case 'n':
+		    (void) printf ("%s", uts.nodename);
+		    break;
+		    
+		  case 'r':
+		    (void) printf ("%s", uts.release);
+		    break;
+		    
+		  case 'v':
+		    (void) printf ("%s", uts.version);
+		    break;
+		    
+		  case 'm':
+		    (void) printf ("%s", uts.machine);
+		    break;
+
+		  case 'o':
+		    (void) printf ("%s", uts.domainname);
+		    break;
+
+		  case 'd':
+		  case 't':
+		    {
+		      char *weekday[] = { "Sun", "Mon", "Tue", "Wed", "Thu",
+					  "Fri", "Sat" };
+		      char *month[] = { "Jan", "Feb", "Mar", "Apr", "May",
+					"Jun", "Jul", "Aug", "Sep", "Oct",
+					"Nov", "Dec" };
+		      time_t now;
+		      struct tm *tm;
+
+		      (void) time (&now);
+		      tm = localtime(&now);
+
+		      if (c == 'd')
+			(void) printf ("%s %s %d  %d",
+				weekday[tm->tm_wday], month[tm->tm_mon],
+				tm->tm_mday, 
+				tm->tm_year < 70 ? tm->tm_year + 2000 :
+				tm->tm_year + 1900);
+		      else
+			(void) printf ("%02d:%02d:%02d",
+				tm->tm_hour, tm->tm_min, tm->tm_sec);
+		      
+		      break;
+		    }
+
+		  case 'l':
+		      (void) printf ("%s", op->tty);
+		      break;
+
+		  case 'b':
+		    {
+		      char *zpeedz[] = { "0", "50", "75", "110", "134.5",
+					 "150", "200", "300", "600", "1200",
+					 "1800", "2400", "4800", "9600", 
+					 "19200", "38400" };
+
+		      (void) printf ("%s", zpeedz[tp->c_cflag & CBAUD]);
+		      break;
+		    }
+		  case 'u':
+		  case 'U':
+		    {
+		      int users = 0;
+		      struct utmp *ut;
+		      setutent();
+		      while (ut = getutent())
+		        if (ut->ut_type == USER_PROCESS)
+			  users++;
+		      endutent();
+		      printf ("%d", users);
+		      if (c == 'U')
+		        printf (" user%s", users == 1 ? "" : "s");
+		      break;
+		    }
+		  default:
+		    (void) putchar(c);
+		  }
+	      }
+	    else
+	      (void) putchar(c);
+	}
+	fflush(stdout);
+
+	tp->c_oflag = oflag;			/* restore settings */
+	(void) ioctl(0, TCSETAW, tp);		/* wait till output is gone */
+	(void) fclose(fd);
+    }
+#endif
+#ifdef linux
+	{
+		char hn[MAXHOSTNAMELEN+1];
+
+		(void) gethostname(hn, MAXHOSTNAMELEN);
+		write(1, hn, strlen(hn));
+	}
+#endif		
+    (void) write(1, LOGIN, sizeof(LOGIN) - 1);	/* always show login prompt */
+}
+
+/* next_speed - select next baud rate */
+void
+next_speed(tp, op)
+     struct termio *tp;
+     struct options *op;
+{
+    static int baud_index = FIRST_SPEED;/* current speed index */
+
+    baud_index = (baud_index + 1) % op->numspeed;
+    tp->c_cflag &= ~CBAUD;
+    tp->c_cflag |= op->speeds[baud_index];
+    (void) ioctl(0, TCSETA, tp);
+}
+
+/* get_logname - get user name, establish parity, speed, erase, kill, eol */
+
+char   *get_logname(op, cp, tp)
+     struct options *op;
+     struct chardata *cp;
+     struct termio *tp;
+{
+    char    logname[BUFSIZ];
+    char   *bp;
+    char    c;				/* input character, full eight bits */
+    char    ascval;			/* low 7 bits of input character */
+    int     bits;			/* # of "1" bits per character */
+    int     mask;			/* mask with 1 bit up */
+    static char *erase[] = {		/* backspace-space-backspace */
+	"\010\040\010",			/* space parity */
+	"\010\040\010",			/* odd parity */
+	"\210\240\210",			/* even parity */
+	"\210\240\210",			/* no parity */
+    };
+
+    /* Initialize kill, erase, parity etc. (also after switching speeds). */
+
+    *cp = init_chardata;
+
+    /* Flush pending input (esp. after parsing or switching the baud rate). */
+
+    (void) sleep(1);
+    (void) ioctl(0, TCFLSH, (struct termio *) 0);
+
+    /* Prompt for and read a login name. */
+
+    for (*logname = 0; *logname == 0; /* void */ ) {
+
+	/* Write issue file and prompt, with "parity" bit == 0. */
+
+	do_prompt(op, tp);
+
+	/* Read name, watch for break, parity, erase, kill, end-of-line. */
+
+	for (bp = logname, cp->eol = 0; cp->eol == 0; /* void */ ) {
+
+	    /* Do not report trivial EINTR/EIO errors. */
+
+	    if (read(0, &c, 1) < 1) {
+		if (errno == EINTR || errno == EIO)
+		    exit(0);
+		error("%s: read: %m", op->tty);
+	    }
+	    /* Do BREAK handling elsewhere. */
+
+	    if ((c == 0) && op->numspeed > 1)
+		return (0);
+
+	    /* Do parity bit handling. */
+
+	    if (c != (ascval = (c & 0177))) {	/* "parity" bit on ? */
+		for (bits = 1, mask = 1; mask & 0177; mask <<= 1)
+		    if (mask & ascval)
+			bits++;			/* count "1" bits */
+		cp->parity |= ((bits & 1) ? 1 : 2);
+	    }
+	    /* Do erase, kill and end-of-line processing. */
+
+	    switch (ascval) {
+	    case CR:
+	    case NL:
+		*bp = 0;			/* terminate logname */
+		cp->eol = ascval;		/* set end-of-line char */
+		break;
+	    case BS:
+	    case DEL:
+	    case '#':
+		cp->erase = ascval;		/* set erase character */
+		if (bp > logname) {
+		    (void) write(1, erase[cp->parity], 3);
+		    bp--;
+		}
+		break;
+	    case CTL('U'):
+	    case '@':
+		cp->kill = ascval;		/* set kill character */
+		while (bp > logname) {
+		    (void) write(1, erase[cp->parity], 3);
+		    bp--;
+		}
+		break;
+	    case CTL('D'):
+		exit(0);
+	    default:
+		if (!isascii(ascval) || !isprint(ascval)) {
+		     /* ignore garbage characters */ ;
+		} else if (bp - logname >= sizeof(logname) - 1) {
+		    error("%s: input overrun", op->tty);
+		} else {
+		    (void) write(1, &c, 1);	/* echo the character */
+		    *bp++ = ascval;		/* and store it */
+		}
+		break;
+	    }
+	}
+    }
+    /* Handle names with upper case and no lower case. */
+
+    if (cp->capslock = caps_lock(logname)) {
+	for (bp = logname; *bp; bp++)
+	    if (isupper(*bp))
+		*bp = tolower(*bp);		/* map name to lower case */
+    }
+    return (logname);
+}
+
+/* termio_final - set the final tty mode bits */
+void
+termio_final(op, tp, cp)
+     struct options *op;
+     struct termio *tp;
+     struct chardata *cp;
+{
+    /* General terminal-independent stuff. */
+
+    tp->c_iflag |= IXON | IXOFF;		/* 2-way flow control */
+    tp->c_lflag |= ICANON | ISIG | ECHO | ECHOE | ECHOK| ECHOKE;
+      /* no longer| ECHOCTL | ECHOPRT*/
+    tp->c_oflag |= OPOST;
+    /* tp->c_cflag = 0; */
+    tp->c_cc[VINTR] = DEF_INTR;			/* default interrupt */
+    tp->c_cc[VQUIT] = DEF_QUIT;			/* default quit */
+    tp->c_cc[VEOF] = DEF_EOF;			/* default EOF character */
+    tp->c_cc[VEOL] = DEF_EOL;
+#ifdef linux
+    tp->c_cc[VSWTC] = DEF_SWITCH;		/* default switch character */
+#else
+    tp->c_cc[VSWTCH] = DEF_SWITCH;		/* default switch character */
+#endif
+
+    /* Account for special characters seen in input. */
+
+    if (cp->eol == CR) {
+	tp->c_iflag |= ICRNL;			/* map CR in input to NL */
+	tp->c_oflag |= ONLCR;			/* map NL in output to CR-NL */
+    }
+    tp->c_cc[VERASE] = cp->erase;		/* set erase character */
+    tp->c_cc[VKILL] = cp->kill;			/* set kill character */
+
+    /* Account for the presence or absence of parity bits in input. */
+
+    switch (cp->parity) {
+    case 0:					/* space (always 0) parity */
+	break;
+    case 1:					/* odd parity */
+	tp->c_cflag |= PARODD;
+	/* FALLTHROUGH */
+    case 2:					/* even parity */
+	tp->c_cflag |= PARENB;
+	tp->c_iflag |= INPCK | ISTRIP;
+	/* FALLTHROUGH */
+    case (1 | 2):				/* no parity bit */
+	tp->c_cflag &= ~CSIZE;
+	tp->c_cflag |= CS7;
+	break;
+    }
+    /* Account for upper case without lower case. */
+
+    if (cp->capslock) {
+	tp->c_iflag |= IUCLC;
+	tp->c_lflag |= XCASE;
+	tp->c_oflag |= OLCUC;
+    }
+    /* Optionally enable hardware flow control */
+
+#ifdef	CRTSCTS
+    if (op->flags & F_RTSCTS)
+	tp->c_cflag |= CRTSCTS;
+#endif
+
+    /* Finally, make the new settings effective */
+
+    if (ioctl(0, TCSETA, tp) < 0)
+	error("%s: ioctl: TCSETA: %m", op->tty);
+}
+
+/* caps_lock - string contains upper case without lower case */
+int
+caps_lock(s)
+     char   *s;
+{
+    int     capslock;
+
+    for (capslock = 0; *s; s++) {
+	if (islower(*s))
+	    return (0);
+	if (capslock == 0)
+	    capslock = isupper(*s);
+    }
+    return (capslock);
+}
+
+/* bcode - convert speed string to speed code; return 0 on failure */
+int
+bcode(s)
+     char   *s;
+{
+    struct Speedtab {
+	long    speed;
+	int     code;
+    };
+    static struct Speedtab speedtab[] = {
+	50, B50,
+	75, B75,
+	110, B110,
+	134, B134,
+	150, B150,
+	200, B200,
+	300, B300,
+	600, B600,
+	1200, B1200,
+	1800, B1800,
+	2400, B2400,
+	4800, B4800,
+	9600, B9600,
+#ifdef	B19200
+	19200, B19200,
+#endif
+#ifdef	B38400
+	38400, B38400,
+#endif
+#ifdef	EXTA
+	19200, EXTA,
+#endif
+#ifdef	EXTB
+	38400, EXTB,
+#endif
+	0, 0,
+    };
+    struct Speedtab *sp;
+    long    speed = atol(s);
+
+    for (sp = speedtab; sp->speed; sp++)
+	if (sp->speed == speed)
+	    return (sp->code);
+    return (0);
+}
+
+/* usage - explain */
+
+void
+usage()
+{
+#if defined(SYSV_STYLE) && !defined(linux)
+    static char msg[] =
+    "[-i] [-l login_program] [-m] [-t timeout] line baud_rate,...";
+#else
+    static char msg[] =
+    "[-h] [-l login_program] [-m] [-t timeout] baud_rate,... line";
+#endif
+
+    error("usage: %s %s", progname, msg);
+}
+
+/* error - report errors to console or syslog; only understands %s and %m */
+
+#define	str2cpy(b,s1,s2)	strcat(strcpy(b,s1),s2)
+
+/* VARARGS */
+void
+error(va_alist)
+     va_dcl
+{
+    va_list ap;
+    char   *fmt;
+#ifndef	USE_SYSLOG
+    int     fd;
+#endif
+    char    buf[BUFSIZ];
+    char   *bp;
+
+    char   *strcpy();
+    char   *strcat();
+
+    /*
+     * If the diagnostic is reported via syslog(3), the process name is
+     * automatically prepended to the message. If we write directly to
+     * /dev/console, we must prepend the process name ourselves.
+     */
+
+#ifdef USE_SYSLOG
+    buf[0] = '\0';
+    bp = buf;
+#else
+    (void) str2cpy(buf, progname, ": ");
+    bp = buf + strlen(buf);
+#endif
+
+    /*
+     * %s expansion is done by hand. On a System V Release 2 system without
+     * shared libraries and without syslog(3), linking with the the stdio
+     * library would make the program three times as big...
+     *
+     * %m expansion is done here as well. Too bad syslog(3) does not have a
+     * vsprintf() like interface.
+     */
+
+    va_start(ap);
+    fmt = va_arg(ap, char *);
+    while (*fmt) {
+	if (strncmp(fmt, "%s", 2) == 0) {
+	    (void) strcpy(bp, va_arg(ap, char *));
+	    bp += strlen(bp);
+	    fmt += 2;
+	} else if (strncmp(fmt, "%m", 2) == 0) {
+	    (void) strcpy(bp, sys_errlist[errno]);
+	    bp += strlen(bp);
+	    fmt += 2;
+	} else {
+	    *bp++ = *fmt++;
+	}
+    }
+    *bp = 0;
+    va_end(ap);
+
+    /*
+     * Write the diagnostic directly to /dev/console if we do not use the
+     * syslog(3) facility.
+     */
+
+#ifdef	USE_SYSLOG
+    (void) openlog(progname, LOG_PID, LOG_AUTH);
+    (void) syslog(LOG_ERR, "%s", buf);
+    closelog();
+#else
+    /* Terminate with CR-LF since the console mode is unknown. */
+    (void) strcat(bp, "\r\n");
+    if ((fd = open("/dev/console", 1)) >= 0) {
+	(void) write(fd, buf, strlen(buf));
+	(void) close(fd);
+    }
+#endif
+    (void) sleep((unsigned) 10);			/* be kind to init(8) */
+    exit(1);
+}