BSD 4.4 Lite Usr.bin Sources

5 files changed, 981 insertions, 0 deletions

diff --git a/usr.bin/login/Makefile b/usr.bin/login/Makefile
new file mode 100644
index 0000000..a11fbc0
--- /dev/null
+++ b/usr.bin/login/Makefile
@@ -0,0 +1,12 @@
+#	@(#)Makefile	8.1 (Berkeley) 7/19/93
+
+CFLAGS+=-DKERBEROS
+PROG=	login
+SRCS=	klogin.c login.c
+DPADD=	${LIBUTIL} ${LIBKRB} ${LIBDES}
+LDADD=	-lutil -lkrb -ldes
+BINOWN=	root
+BINMODE=4555
+INSTALLFLAGS=-fschg
+
+.include <bsd.prog.mk>
diff --git a/usr.bin/login/klogin.c b/usr.bin/login/klogin.c
new file mode 100644
index 0000000..6601a6e
--- /dev/null
+++ b/usr.bin/login/klogin.c
@@ -0,0 +1,190 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)klogin.c	8.3 (Berkeley) 4/2/94";
+#endif /* not lint */
+
+#ifdef KERBEROS
+#include <sys/param.h>
+#include <sys/syslog.h>
+#include <kerberosIV/des.h>
+#include <kerberosIV/krb.h>
+
+#include <err.h>
+#include <netdb.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define	INITIAL_TICKET	"krbtgt"
+#define	VERIFY_SERVICE	"rcmd"
+
+extern int notickets;
+extern char *krbtkfile_env;
+
+/*
+ * Attempt to log the user in using Kerberos authentication
+ *
+ * return 0 on success (will be logged in)
+ *	  1 if Kerberos failed (try local password in login)
+ */
+int
+klogin(pw, instance, localhost, password)
+	struct passwd *pw;
+	char *instance, *localhost, *password;
+{
+	int kerror;
+	AUTH_DAT authdata;
+	KTEXT_ST ticket;
+	struct hostent *hp;
+	unsigned long faddr;
+	char realm[REALM_SZ], savehost[MAXHOSTNAMELEN];
+	char tkt_location[MAXPATHLEN];
+	char *krb_get_phost();
+
+	/*
+	 * Root logins don't use Kerberos.
+	 * If we have a realm, try getting a ticket-granting ticket
+	 * and using it to authenticate.  Otherwise, return
+	 * failure so that we can try the normal passwd file
+	 * for a password.  If that's ok, log the user in
+	 * without issuing any tickets.
+	 */
+	if (strcmp(pw->pw_name, "root") == 0 ||
+	    krb_get_lrealm(realm, 0) != KSUCCESS)
+		return (1);
+
+	/*
+	 * get TGT for local realm
+	 * tickets are stored in a file named TKT_ROOT plus uid
+	 * except for user.root tickets.
+	 */
+
+	if (strcmp(instance, "root") != 0)
+		(void)sprintf(tkt_location, "%s%d", TKT_ROOT, pw->pw_uid);
+	else {
+		(void)sprintf(tkt_location, "%s_root_%d", TKT_ROOT, pw->pw_uid);
+		krbtkfile_env = tkt_location;
+	}
+	(void)krb_set_tkt_string(tkt_location);
+
+	/*
+	 * Set real as well as effective ID to 0 for the moment,
+	 * to make the kerberos library do the right thing.
+	 */
+	if (setuid(0) < 0) {
+		warnx("setuid");
+		return (1);
+	}
+	kerror = krb_get_pw_in_tkt(pw->pw_name, instance,
+		    realm, INITIAL_TICKET, realm, DEFAULT_TKT_LIFE, password);
+	/*
+	 * If we got a TGT, get a local "rcmd" ticket and check it so as to
+	 * ensure that we are not talking to a bogus Kerberos server.
+	 *
+	 * There are 2 cases where we still allow a login:
+	 *	1: the VERIFY_SERVICE doesn't exist in the KDC
+	 *	2: local host has no srvtab, as (hopefully) indicated by a
+	 *	   return value of RD_AP_UNDEC from krb_rd_req().
+	 */
+	if (kerror != INTK_OK) {
+		if (kerror != INTK_BADPW && kerror != KDC_PR_UNKNOWN) {
+			syslog(LOG_ERR, "Kerberos intkt error: %s",
+			    krb_err_txt[kerror]);
+			dest_tkt();
+		}
+		return (1);
+	}
+
+	if (chown(TKT_FILE, pw->pw_uid, pw->pw_gid) < 0)
+		syslog(LOG_ERR, "chown tkfile (%s): %m", TKT_FILE);
+
+	(void)strncpy(savehost, krb_get_phost(localhost), sizeof(savehost));
+	savehost[sizeof(savehost)-1] = NULL;
+
+	/*
+	 * if the "VERIFY_SERVICE" doesn't exist in the KDC for this host,
+	 * still allow login with tickets, but log the error condition.
+	 */
+
+	kerror = krb_mk_req(&ticket, VERIFY_SERVICE, savehost, realm, 33);
+	if (kerror == KDC_PR_UNKNOWN) {
+		syslog(LOG_NOTICE,
+    		    "warning: TGT not verified (%s); %s.%s not registered, or srvtab is wrong?",
+		    krb_err_txt[kerror], VERIFY_SERVICE, savehost);
+		notickets = 0;
+		return (0);
+	}
+
+	if (kerror != KSUCCESS) {
+		warnx("unable to use TGT: (%s)", krb_err_txt[kerror]);
+		syslog(LOG_NOTICE, "unable to use TGT: (%s)",
+		    krb_err_txt[kerror]);
+		dest_tkt();
+		return (1);
+	}
+
+	if (!(hp = gethostbyname(localhost))) {
+		syslog(LOG_ERR, "couldn't get local host address");
+		dest_tkt();
+		return (1);
+	}
+
+	memmove((void *)&faddr, (void *)hp->h_addr, sizeof(faddr));
+
+	kerror = krb_rd_req(&ticket, VERIFY_SERVICE, savehost, faddr,
+	    &authdata, "");
+
+	if (kerror == KSUCCESS) {
+		notickets = 0;
+		return (0);
+	}
+
+	/* undecipherable: probably didn't have a srvtab on the local host */
+	if (kerror = RD_AP_UNDEC) {
+		syslog(LOG_NOTICE, "krb_rd_req: (%s)\n", krb_err_txt[kerror]);
+		dest_tkt();
+		return (1);
+	}
+	/* failed for some other reason */
+	warnx("unable to verify %s ticket: (%s)", VERIFY_SERVICE,
+	    krb_err_txt[kerror]);
+	syslog(LOG_NOTICE, "couldn't verify %s ticket: %s", VERIFY_SERVICE,
+	    krb_err_txt[kerror]);
+	dest_tkt();
+	return (1);
+}
+#endif
diff --git a/usr.bin/login/login.1 b/usr.bin/login/login.1
new file mode 100644
index 0000000..db59c1a
--- /dev/null
+++ b/usr.bin/login/login.1
@@ -0,0 +1,146 @@
+.\" Copyright (c) 1980, 1990, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	@(#)login.1	8.1 (Berkeley) 6/9/93
+.\"
+.Dd June 9, 1993
+.Dt LOGIN 1
+.Os BSD 4
+.Sh NAME
+.Nm login
+.Nd log into the computer
+.Sh SYNOPSIS
+.Nm login
+.Op Fl fp
+.Op Fl h Ar hostname
+.Op Ar user
+.Sh DESCRIPTION
+The
+.Nm login
+utility logs users (and pseudo-users) into the computer system.
+.Pp
+If no user is specified, or if a user is specified and authentication
+of the user fails,
+.Nm login
+prompts for a user name.
+Authentication of users is done via passwords.
+.Pp
+The options are as follows:
+.Bl -tag -width Ds
+.It Fl f
+The
+.Fl f
+option is used when a user name is specified to indicate that proper
+authentication has already been done and that no password need be
+requested.
+This option may only be used by the super-user or when an already
+logged in user is logging in as themselves.
+.It Fl h
+The
+.Fl h
+option specifies the host from which the connection was received.
+It is used by various daemons such as
+.Xr telnetd  8 .
+This option may only be used by the super-user.
+.It Fl p
+By default,
+.Nm login
+discards any previous environment.
+The
+.Fl p
+option disables this behavior.
+.El
+.Pp
+If the file
+.Pa /etc/nologin
+exists,
+.Nm login
+dislays its contents to the user and exits.
+This is used by
+.Xr shutdown  8
+to prevent users from logging in when the system is about to go down.
+.Pp
+Immediately after logging a user in,
+.Nm login
+displays the system copyright notice, the date and time the user last
+logged in, the message of the day as well as other information.
+If the file
+.Dq Pa .hushlogin
+exists in the user's home directory, all of these messages are suppressed.
+This is to simplify logins for non-human users, such as
+.Xr uucp 1 .
+.Nm Login
+then records an entry in the
+.Xr wtmp 5
+and
+.Xr utmp 5
+files and executes the user's command interpretor.
+.Pp
+Login enters information into the environment (see
+.Xr environ 7 )
+specifying the user's home directory (HOME), command interpreter (SHELL),
+search path (PATH), terminal type (TERM) and user name (both LOGNAME and
+USER).
+.Pp
+The standard shells,
+.Xr csh 1
+and
+.Xr sh 1 ,
+do not fork before executing the
+.Nm login
+utility.
+.Sh FILES
+.Bl -tag -width /var/mail/userXXX -compact
+.It Pa /etc/motd
+message-of-the-day
+.It Pa /etc/nologin
+disallows logins
+.It Pa /var/run/utmp
+current logins
+.It Pa /var/log/wtmp
+login account records
+.It Pa /var/mail/user
+system mailboxes
+.It Pa \&.hushlogin
+makes login quieter
+.El
+.Sh SEE ALSO
+.Xr chpass 1 ,
+.Xr passwd 1 ,
+.Xr rlogin 1 ,
+.Xr getpass 3 ,
+.Xr utmp 5 ,
+.Xr environ 7 ,
+.Sh HISTORY
+A
+.Nm login
+appeared in
+.At v6 .
diff --git a/usr.bin/login/login.c b/usr.bin/login/login.c
new file mode 100644
index 0000000..ef75733
--- /dev/null
+++ b/usr.bin/login/login.c
@@ -0,0 +1,594 @@
+/*-
+ * Copyright (c) 1980, 1987, 1988, 1991, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1980, 1987, 1988, 1991, 1993, 1994\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)login.c	8.4 (Berkeley) 4/2/94";
+#endif /* not lint */
+
+/*
+ * login [ name ]
+ * login -h hostname	(for telnetd, etc.)
+ * login -f name	(for pre-authenticated login: datakit, xterm, etc.)
+ */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/file.h>
+
+#include <err.h>
+#include <errno.h>
+#include <grp.h>
+#include <pwd.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <ttyent.h>
+#include <tzfile.h>
+#include <unistd.h>
+#include <utmp.h>
+
+#include "pathnames.h"
+
+void	 badlogin __P((char *));
+void	 checknologin __P((void));
+void	 dolastlog __P((int));
+void	 getloginname __P((void));
+void	 motd __P((void));
+int	 rootterm __P((char *));
+void	 sigint __P((int));
+void	 sleepexit __P((int));
+char	*stypeof __P((char *));
+void	 timedout __P((int));
+#ifdef KERBEROS
+int	 klogin __P((struct passwd *, char *, char *, char *));
+#endif
+
+extern void login __P((struct utmp *));
+
+#define	TTYGRPNAME	"tty"		/* name of group to own ttys */
+
+/*
+ * This bounds the time given to login.  Not a define so it can
+ * be patched on machines where it's too small.
+ */
+u_int	timeout = 300;
+
+#ifdef KERBEROS
+int	notickets = 1;
+char	*instance;
+char	*krbtkfile_env;
+int	authok;
+#endif
+
+struct	passwd *pwd;
+int	failures;
+char	term[64], *envinit[1], *hostname, *username, *tty;
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	extern char **environ;
+	struct group *gr;
+	struct stat st;
+	struct timeval tp;
+	struct utmp utmp;
+	int ask, ch, cnt, fflag, hflag, pflag, quietlog, rootlogin, rval;
+	uid_t uid;
+	char *domain, *p, *salt, *ttyn;
+	char tbuf[MAXPATHLEN + 2], tname[sizeof(_PATH_TTY) + 10];
+	char localhost[MAXHOSTNAMELEN];
+
+	(void)signal(SIGALRM, timedout);
+	(void)alarm(timeout);
+	(void)signal(SIGQUIT, SIG_IGN);
+	(void)signal(SIGINT, SIG_IGN);
+	(void)setpriority(PRIO_PROCESS, 0, 0);
+
+	openlog("login", LOG_ODELAY, LOG_AUTH);
+
+	/*
+	 * -p is used by getty to tell login not to destroy the environment
+	 * -f is used to skip a second login authentication
+	 * -h is used by other servers to pass the name of the remote
+	 *    host to login so that it may be placed in utmp and wtmp
+	 */
+	domain = NULL;
+	if (gethostname(localhost, sizeof(localhost)) < 0)
+		syslog(LOG_ERR, "couldn't get local hostname: %m");
+	else
+		domain = strchr(localhost, '.');
+
+	fflag = hflag = pflag = 0;
+	uid = getuid();
+	while ((ch = getopt(argc, argv, "fh:p")) != EOF)
+		switch (ch) {
+		case 'f':
+			fflag = 1;
+			break;
+		case 'h':
+			if (uid)
+				errx(1, "-h option: %s", strerror(EPERM));
+			hflag = 1;
+			if (domain && (p = strchr(optarg, '.')) &&
+			    strcasecmp(p, domain) == 0)
+				*p = 0;
+			hostname = optarg;
+			break;
+		case 'p':
+			pflag = 1;
+			break;
+		case '?':
+		default:
+			if (!uid)
+				syslog(LOG_ERR, "invalid flag %c", ch);
+			(void)fprintf(stderr,
+			    "usage: login [-fp] [-h hostname] [username]\n");
+			exit(1);
+		}
+	argc -= optind;
+	argv += optind;
+
+	if (*argv) {
+		username = *argv;
+		ask = 0;
+	} else
+		ask = 1;
+
+	for (cnt = getdtablesize(); cnt > 2; cnt--)
+		(void)close(cnt);
+
+	ttyn = ttyname(STDIN_FILENO);
+	if (ttyn == NULL || *ttyn == '\0') {
+		(void)snprintf(tname, sizeof(tname), "%s??", _PATH_TTY);
+		ttyn = tname;
+	}
+	if (tty = strrchr(ttyn, '/'))
+		++tty;
+	else
+		tty = ttyn;
+
+	for (cnt = 0;; ask = 1) {
+		if (ask) {
+			fflag = 0;
+			getloginname();
+		}
+		rootlogin = 0;
+#ifdef	KERBEROS
+		if ((instance = strchr(username, '.')) != NULL) {
+			if (strncmp(instance, ".root", 5) == 0)
+				rootlogin = 1;
+			*instance++ = '\0';
+		} else
+			instance = "";
+#endif
+		if (strlen(username) > UT_NAMESIZE)
+			username[UT_NAMESIZE] = '\0';
+
+		/*
+		 * Note if trying multiple user names; log failures for
+		 * previous user name, but don't bother logging one failure
+		 * for nonexistent name (mistyped username).
+		 */
+		if (failures && strcmp(tbuf, username)) {
+			if (failures > (pwd ? 0 : 1))
+				badlogin(tbuf);
+			failures = 0;
+		}
+		(void)strcpy(tbuf, username);
+
+		if (pwd = getpwnam(username))
+			salt = pwd->pw_passwd;
+		else
+			salt = "xx";
+
+		/*
+		 * if we have a valid account name, and it doesn't have a
+		 * password, or the -f option was specified and the caller
+		 * is root or the caller isn't changing their uid, don't
+		 * authenticate.
+		 */
+		if (pwd && (*pwd->pw_passwd == '\0' ||
+		    fflag && (uid == 0 || uid == pwd->pw_uid)))
+			break;
+		fflag = 0;
+		if (pwd && pwd->pw_uid == 0)
+			rootlogin = 1;
+
+		(void)setpriority(PRIO_PROCESS, 0, -4);
+
+		p = getpass("Password:");
+
+		if (pwd) {
+#ifdef KERBEROS
+			rval = klogin(pwd, instance, localhost, p);
+			if (rval != 0 && rootlogin && pwd->pw_uid != 0)
+				rootlogin = 0;
+			if (rval == 0)
+				authok = 1;
+			else if (rval == 1)
+				rval = strcmp(crypt(p, salt), pwd->pw_passwd);
+#else
+			rval = strcmp(crypt(p, salt), pwd->pw_passwd);
+#endif
+		}
+		memset(p, 0, strlen(p));
+
+		(void)setpriority(PRIO_PROCESS, 0, 0);
+
+		/*
+		 * If trying to log in as root without Kerberos,
+		 * but with insecure terminal, refuse the login attempt.
+		 */
+#ifdef KERBEROS
+		if (authok == 0)
+#endif
+		if (pwd && rootlogin && !rootterm(tty)) {
+			(void)fprintf(stderr,
+			    "%s login refused on this terminal.\n",
+			    pwd->pw_name);
+			if (hostname)
+				syslog(LOG_NOTICE,
+				    "LOGIN %s REFUSED FROM %s ON TTY %s",
+				    pwd->pw_name, hostname, tty);
+			else
+				syslog(LOG_NOTICE,
+				    "LOGIN %s REFUSED ON TTY %s",
+				     pwd->pw_name, tty);
+			continue;
+		}
+
+		if (pwd && !rval)
+			break;
+
+		(void)printf("Login incorrect\n");
+		failures++;
+		/* we allow 10 tries, but after 3 we start backing off */
+		if (++cnt > 3) {
+			if (cnt >= 10) {
+				badlogin(username);
+				sleepexit(1);
+			}
+			sleep((u_int)((cnt - 3) * 5));
+		}
+	}
+
+	/* committed to login -- turn off timeout */
+	(void)alarm((u_int)0);
+
+	endpwent();
+
+	/* if user not super-user, check for disabled logins */
+	if (!rootlogin)
+		checknologin();
+
+	if (chdir(pwd->pw_dir) < 0) {
+		(void)printf("No home directory %s!\n", pwd->pw_dir);
+		if (chdir("/"))
+			exit(0);
+		pwd->pw_dir = "/";
+		(void)printf("Logging in with home = \"/\".\n");
+	}
+
+	quietlog = access(_PATH_HUSHLOGIN, F_OK) == 0;
+
+	if (pwd->pw_change || pwd->pw_expire)
+		(void)gettimeofday(&tp, (struct timezone *)NULL);
+	if (pwd->pw_change)
+		if (tp.tv_sec >= pwd->pw_change) {
+			(void)printf("Sorry -- your password has expired.\n");
+			sleepexit(1);
+		} else if (pwd->pw_change - tp.tv_sec <
+		    2 * DAYSPERWEEK * SECSPERDAY && !quietlog)
+			(void)printf("Warning: your password expires on %s",
+			    ctime(&pwd->pw_change));
+	if (pwd->pw_expire)
+		if (tp.tv_sec >= pwd->pw_expire) {
+			(void)printf("Sorry -- your account has expired.\n");
+			sleepexit(1);
+		} else if (pwd->pw_expire - tp.tv_sec <
+		    2 * DAYSPERWEEK * SECSPERDAY && !quietlog)
+			(void)printf("Warning: your account expires on %s",
+			    ctime(&pwd->pw_expire));
+
+	/* Nothing else left to fail -- really log in. */
+	memset((void *)&utmp, 0, sizeof(utmp));
+	(void)time(&utmp.ut_time);
+	(void)strncpy(utmp.ut_name, username, sizeof(utmp.ut_name));
+	if (hostname)
+		(void)strncpy(utmp.ut_host, hostname, sizeof(utmp.ut_host));
+	(void)strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line));
+	login(&utmp);
+
+	dolastlog(quietlog);
+
+	(void)chown(ttyn, pwd->pw_uid,
+	    (gr = getgrnam(TTYGRPNAME)) ? gr->gr_gid : pwd->pw_gid);
+	(void)setgid(pwd->pw_gid);
+
+	initgroups(username, pwd->pw_gid);
+
+	if (*pwd->pw_shell == '\0')
+		pwd->pw_shell = _PATH_BSHELL;
+
+	/* Destroy environment unless user has requested its preservation. */
+	if (!pflag)
+		environ = envinit;
+	(void)setenv("HOME", pwd->pw_dir, 1);
+	(void)setenv("SHELL", pwd->pw_shell, 1);
+	if (term[0] == '\0')
+		(void)strncpy(term, stypeof(tty), sizeof(term));
+	(void)setenv("TERM", term, 0);
+	(void)setenv("LOGNAME", pwd->pw_name, 1);
+	(void)setenv("USER", pwd->pw_name, 1);
+	(void)setenv("PATH", _PATH_DEFPATH, 0);
+#ifdef KERBEROS
+	if (krbtkfile_env)
+		(void)setenv("KRBTKFILE", krbtkfile_env, 1);
+#endif
+
+	if (tty[sizeof("tty")-1] == 'd')
+		syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name);
+
+	/* If fflag is on, assume caller/authenticator has logged root login. */
+	if (rootlogin && fflag == 0)
+		if (hostname)
+			syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s FROM %s",
+			    username, tty, hostname);
+		else
+			syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s", username, tty);
+
+#ifdef KERBEROS
+	if (!quietlog && notickets == 1)
+		(void)printf("Warning: no Kerberos tickets issued.\n");
+#endif
+
+	if (!quietlog) {
+		(void)printf("%s\n\t%s  %s\n\n",
+	    "Copyright (c) 1980, 1983, 1986, 1988, 1990, 1991, 1993, 1994",
+		    "The Regents of the University of California. ",
+		    "All rights reserved.");
+		motd();
+		(void)snprintf(tbuf,
+		    sizeof(tbuf), "%s/%s", _PATH_MAILDIR, pwd->pw_name);
+		if (stat(tbuf, &st) == 0 && st.st_size != 0)
+			(void)printf("You have %smail.\n",
+			    (st.st_mtime > st.st_atime) ? "new " : "");
+	}
+
+	(void)signal(SIGALRM, SIG_DFL);
+	(void)signal(SIGQUIT, SIG_DFL);
+	(void)signal(SIGINT, SIG_DFL);
+	(void)signal(SIGTSTP, SIG_IGN);
+
+	tbuf[0] = '-';
+	(void)strcpy(tbuf + 1, (p = strrchr(pwd->pw_shell, '/')) ?
+	    p + 1 : pwd->pw_shell);
+
+	if (setlogin(pwd->pw_name) < 0)
+		syslog(LOG_ERR, "setlogin() failure: %m");
+
+	/* Discard permissions last so can't get killed and drop core. */
+	if (rootlogin)
+		(void) setuid(0);
+	else
+		(void) setuid(pwd->pw_uid);
+
+	execlp(pwd->pw_shell, tbuf, 0);
+	err(1, "%s", pwd->pw_shell);
+}
+
+#ifdef	KERBEROS
+#define	NBUFSIZ		(UT_NAMESIZE + 1 + 5)	/* .root suffix */
+#else
+#define	NBUFSIZ		(UT_NAMESIZE + 1)
+#endif
+
+void
+getloginname()
+{
+	int ch;
+	char *p;
+	static char nbuf[NBUFSIZ];
+
+	for (;;) {
+		(void)printf("login: ");
+		for (p = nbuf; (ch = getchar()) != '\n'; ) {
+			if (ch == EOF) {
+				badlogin(username);
+				exit(0);
+			}
+			if (p < nbuf + (NBUFSIZ - 1))
+				*p++ = ch;
+		}
+		if (p > nbuf)
+			if (nbuf[0] == '-')
+				(void)fprintf(stderr,
+				    "login names may not start with '-'.\n");
+			else {
+				*p = '\0';
+				username = nbuf;
+				break;
+			}
+	}
+}
+
+int
+rootterm(ttyn)
+	char *ttyn;
+{
+	struct ttyent *t;
+
+	return ((t = getttynam(ttyn)) && t->ty_status & TTY_SECURE);
+}
+
+jmp_buf motdinterrupt;
+
+void
+motd()
+{
+	int fd, nchars;
+	sig_t oldint;
+	char tbuf[8192];
+
+	if ((fd = open(_PATH_MOTDFILE, O_RDONLY, 0)) < 0)
+		return;
+	oldint = signal(SIGINT, sigint);
+	if (setjmp(motdinterrupt) == 0)
+		while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0)
+			(void)write(fileno(stdout), tbuf, nchars);
+	(void)signal(SIGINT, oldint);
+	(void)close(fd);
+}
+
+/* ARGSUSED */
+void
+sigint(signo)
+	int signo;
+{
+
+	longjmp(motdinterrupt, 1);
+}
+
+/* ARGSUSED */
+void
+timedout(signo)
+	int signo;
+{
+
+	(void)fprintf(stderr, "Login timed out after %d seconds\n", timeout);
+	exit(0);
+}
+
+void
+checknologin()
+{
+	int fd, nchars;
+	char tbuf[8192];
+
+	if ((fd = open(_PATH_NOLOGIN, O_RDONLY, 0)) >= 0) {
+		while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0)
+			(void)write(fileno(stdout), tbuf, nchars);
+		sleepexit(0);
+	}
+}
+
+void
+dolastlog(quiet)
+	int quiet;
+{
+	struct lastlog ll;
+	int fd;
+
+	if ((fd = open(_PATH_LASTLOG, O_RDWR, 0)) >= 0) {
+		(void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET);
+		if (!quiet) {
+			if (read(fd, (char *)&ll, sizeof(ll)) == sizeof(ll) &&
+			    ll.ll_time != 0) {
+				(void)printf("Last login: %.*s ",
+				    24-5, (char *)ctime(&ll.ll_time));
+				if (*ll.ll_host != '\0')
+					(void)printf("from %.*s\n",
+					    (int)sizeof(ll.ll_host),
+					    ll.ll_host);
+				else
+					(void)printf("on %.*s\n",
+					    (int)sizeof(ll.ll_line),
+					    ll.ll_line);
+			}
+			(void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET);
+		}
+		memset((void *)&ll, 0, sizeof(ll));
+		(void)time(&ll.ll_time);
+		(void)strncpy(ll.ll_line, tty, sizeof(ll.ll_line));
+		if (hostname)
+			(void)strncpy(ll.ll_host, hostname, sizeof(ll.ll_host));
+		(void)write(fd, (char *)&ll, sizeof(ll));
+		(void)close(fd);
+	}
+}
+
+void
+badlogin(name)
+	char *name;
+{
+
+	if (failures == 0)
+		return;
+	if (hostname) {
+		syslog(LOG_NOTICE, "%d LOGIN FAILURE%s FROM %s",
+		    failures, failures > 1 ? "S" : "", hostname);
+		syslog(LOG_AUTHPRIV|LOG_NOTICE,
+		    "%d LOGIN FAILURE%s FROM %s, %s",
+		    failures, failures > 1 ? "S" : "", hostname, name);
+	} else {
+		syslog(LOG_NOTICE, "%d LOGIN FAILURE%s ON %s",
+		    failures, failures > 1 ? "S" : "", tty);
+		syslog(LOG_AUTHPRIV|LOG_NOTICE,
+		    "%d LOGIN FAILURE%s ON %s, %s",
+		    failures, failures > 1 ? "S" : "", tty, name);
+	}
+}
+
+#undef	UNKNOWN
+#define	UNKNOWN	"su"
+
+char *
+stypeof(ttyid)
+	char *ttyid;
+{
+	struct ttyent *t;
+
+	return (ttyid && (t = getttynam(ttyid)) ? t->ty_type : UNKNOWN);
+}
+
+void
+sleepexit(eval)
+	int eval;
+{
+
+	(void)sleep(5);
+	exit(eval);
+}
diff --git a/usr.bin/login/pathnames.h b/usr.bin/login/pathnames.h
new file mode 100644
index 0000000..a9e1a077
--- /dev/null
+++ b/usr.bin/login/pathnames.h
@@ -0,0 +1,39 @@
+/*-
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)pathnames.h	8.1 (Berkeley) 6/9/93
+ */
+
+#include <paths.h>
+
+#define	_PATH_HUSHLOGIN	".hushlogin"
+#define	_PATH_MOTDFILE	"/etc/motd"