--- old/usr/src/cmd/ssh/sshd/loginrec.c	Tue Aug 16 19:27:17 2016
+++ /dev/null	Tue Aug 16 19:26:53 2016
@@ -1,1453 +0,0 @@
-/*
- * Copyright (c) 2000 Andre Lucas.  All rights reserved.
- * Portions copyright (c) 1998 Todd C. Miller
- * Portions copyright (c) 1996 Jason Downs
- * Portions copyright (c) 1996 Theo de Raadt
- *
- * 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 Markus Friedl.
- * 4. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
- */
-/*
- * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
- */
-
-/**
- ** loginrec.c:  platform-independent login recording and lastlog retrieval
- **/
-
-/*
-  The new login code explained
-  ============================
-
-  This code attempts to provide a common interface to login recording
-  (utmp and friends) and last login time retrieval.
-
-  Its primary means of achieving this is to use 'struct logininfo', a
-  union of all the useful fields in the various different types of
-  system login record structures one finds on UNIX variants.
-
-  We depend on autoconf to define which recording methods are to be
-  used, and which fields are contained in the relevant data structures
-  on the local system. Many C preprocessor symbols affect which code
-  gets compiled here.
-
-  The code is designed to make it easy to modify a particular
-  recording method, without affecting other methods nor requiring so
-  many nested conditional compilation blocks as were commonplace in
-  the old code.
-
-  For login recording, we try to use the local system's libraries as
-  these are clearly most likely to work correctly. For utmp systems
-  this usually means login() and logout() or setutent() etc., probably
-  in libutil, along with logwtmp() etc. On these systems, we fall back
-  to writing the files directly if we have to, though this method
-  requires very thorough testing so we do not corrupt local auditing
-  information. These files and their access methods are very system
-  specific indeed.
-
-  For utmpx systems, the corresponding library functions are
-  setutxent() etc. To the author's knowledge, all utmpx systems have
-  these library functions and so no direct write is attempted. If such
-  a system exists and needs support, direct analogues of the [uw]tmp
-  code should suffice.
-
-  Retrieving the time of last login ('lastlog') is in some ways even
-  more problemmatic than login recording. Some systems provide a
-  simple table of all users which we seek based on uid and retrieve a
-  relatively standard structure. Others record the same information in
-  a directory with a separate file, and others don't record the
-  information separately at all. For systems in the latter category,
-  we look backwards in the wtmp or wtmpx file for the last login entry
-  for our user. Naturally this is slower and on busy systems could
-  incur a significant performance penalty.
-
-  Calling the new code
-  --------------------
-
-  In OpenSSH all login recording and retrieval is performed in
-  login.c. Here you'll find working examples. Also, in the logintest.c
-  program there are more examples.
-
-  Internal handler calling method
-  -------------------------------
-
-  When a call is made to login_login() or login_logout(), both
-  routines set a struct logininfo flag defining which action (log in,
-  or log out) is to be taken. They both then call login_write(), which
-  calls whichever of the many structure-specific handlers autoconf
-  selects for the local system.
-
-  The handlers themselves handle system data structure specifics. Both
-  struct utmp and struct utmpx have utility functions (see
-  construct_utmp*()) to try to make it simpler to add extra systems
-  that introduce new features to either structure.
-
-  While it may seem terribly wasteful to replicate so much similar
-  code for each method, experience has shown that maintaining code to
-  write both struct utmp and utmpx in one function, whilst maintaining
-  support for all systems whether they have library support or not, is
-  a difficult and time-consuming task.
-
-  Lastlog support proceeds similarly. Functions login_get_lastlog()
-  (and its OpenSSH-tuned friend login_get_lastlog_time()) call
-  getlast_entry(), which tries one of three methods to find the last
-  login time. It uses local system lastlog support if it can,
-  otherwise it tries wtmp or wtmpx before giving up and returning 0,
-  meaning "tilt".
-
-  Maintenance
-  -----------
-
-  In many cases it's possible to tweak autoconf to select the correct
-  methods for a particular platform, either by improving the detection
-  code (best), or by presetting DISABLE_<method> or CONF_<method>_FILE
-  symbols for the platform.
-
-  Use logintest to check which symbols are defined before modifying
-  configure.ac and loginrec.c. (You have to build logintest yourself
-  with 'make logintest' as it's not built by default.)
-
-  Otherwise, patches to the specific method(s) are very helpful!
-
-*/
-
-/**
- ** TODO:
- **   homegrown ttyslot()
- **   test, test, test
- **
- ** Platform status:
- ** ----------------
- **
- ** Known good:
- **   Linux (Redhat 6.2, Debian)
- **   Solaris
- **   HP-UX 10.20 (gcc only)
- **   IRIX
- **   NeXT - M68k/HPPA/Sparc (4.2/3.3)
- **
- ** Testing required: Please send reports!
- **   NetBSD
- **   HP-UX 11
- **   AIX
- **
- ** Platforms with known problems:
- **   Some variants of Slackware Linux
- **
- **/
-
-#include "includes.h"
-
-#include "ssh.h"
-#include "xmalloc.h"
-#include "loginrec.h"
-#include "log.h"
-#include "atomicio.h"
-
-RCSID("$Id: loginrec.c,v 1.44 2002/09/26 00:38:49 tim Exp $");
-
-#ifdef HAVE_UTIL_H
-#  include <util.h>
-#endif
-
-#ifdef HAVE_LIBUTIL_H
-#   include <libutil.h>
-#endif
-
-/**
- ** prototypes for helper functions in this file
- **/
-
-#if HAVE_UTMP_H
-void set_utmp_time(struct logininfo *li, struct utmp *ut);
-void construct_utmp(struct logininfo *li, struct utmp *ut);
-#endif
-
-#ifdef HAVE_UTMPX_H
-void set_utmpx_time(struct logininfo *li, struct utmpx *ut);
-void construct_utmpx(struct logininfo *li, struct utmpx *ut);
-#endif
-
-int utmp_write_entry(struct logininfo *li);
-int utmpx_write_entry(struct logininfo *li);
-int wtmp_write_entry(struct logininfo *li);
-int wtmpx_write_entry(struct logininfo *li);
-int lastlog_write_entry(struct logininfo *li);
-int syslogin_write_entry(struct logininfo *li);
-
-int lastlog_get_entry(struct logininfo *li);
-int wtmp_get_entry(struct logininfo *li);
-int wtmpx_get_entry(struct logininfo *li);
-
-/* pick the shortest string */
-#define MIN_SIZEOF(s1,s2) ( sizeof(s1) < sizeof(s2) ? sizeof(s1) : sizeof(s2) )
-
-/**
- ** platform-independent login functions
- **/
-
-/* login_login(struct logininfo *)     -Record a login
- *
- * Call with a pointer to a struct logininfo initialised with
- * login_init_entry() or login_alloc_entry()
- *
- * Returns:
- *  >0 if successful
- *  0  on failure (will use OpenSSH's logging facilities for diagnostics)
- */
-int
-login_login (struct logininfo *li)
-{
-	li->type = LTYPE_LOGIN;
-	return login_write(li);
-}
-
-
-/* login_logout(struct logininfo *)     - Record a logout
- *
- * Call as with login_login()
- *
- * Returns:
- *  >0 if successful
- *  0  on failure (will use OpenSSH's logging facilities for diagnostics)
- */
-int
-login_logout(struct logininfo *li)
-{
-	li->type = LTYPE_LOGOUT;
-	return login_write(li);
-}
-
-/* login_get_lastlog_time(int)           - Retrieve the last login time
- *
- * Retrieve the last login time for the given uid. Will try to use the
- * system lastlog facilities if they are available, but will fall back
- * to looking in wtmp/wtmpx if necessary
- *
- * Returns:
- *   0 on failure, or if user has never logged in
- *   Time in seconds from the epoch if successful
- *
- * Useful preprocessor symbols:
- *   DISABLE_LASTLOG: If set, *never* even try to retrieve lastlog
- *                    info
- *   USE_LASTLOG: If set, indicates the presence of system lastlog
- *                facilities. If this and DISABLE_LASTLOG are not set,
- *                try to retrieve lastlog information from wtmp/wtmpx.
- */
-#if 0
-unsigned int
-login_get_lastlog_time(const int uid)
-{
-	struct logininfo li;
-
-	if (login_get_lastlog(&li, uid))
-		return li.tv_sec;
-	else
-		return 0;
-}
-#endif
-
-/* login_alloc_entry()    - Allocate and initialise a logininfo
- *                           structure
- *
- * This function creates a new struct logininfo, a data structure
- * meant to carry the information required to portably record login info.
- *
- * Returns a pointer to a newly created struct logininfo. If memory
- * allocation fails, the program halts.
- */
-struct
-logininfo *login_alloc_entry(int pid, const char *username,
-			     const char *hostname, const char *line,
-			     const char *progname)
-{
-	struct logininfo *newli;
-
-	newli = (struct logininfo *) xmalloc (sizeof(*newli));
-	(void)login_init_entry(newli, pid, username, hostname, line, progname);
-	return newli;
-}
-
-
-/* login_free_entry(struct logininfo *)    - free struct memory */
-void
-login_free_entry(struct logininfo *li)
-{
-	xfree(li);
-}
-
-
-/* login_init_entry()
- *                                        - initialise a struct logininfo
- *
- * Populates a new struct logininfo, a data structure meant to carry
- * the information required to portably record login info.
- *
- * Returns: 1
- */
-int
-login_init_entry(struct logininfo *li, int pid, const char *username,
-		 const char *hostname, const char *line, const char *progname)
-{
-	struct passwd *pw;
-
-	(void) memset(li, 0, sizeof(*li));
-
-	li->pid = pid;
-
-	/* set the line information */
-	if (line)
-		(void) line_fullname(li->line, line, sizeof(li->line));
-	else
-		li->line_null = 1;
-
-	if (progname)
-		(void) strlcpy(li->progname, progname, sizeof(li->progname));
-	else
-		li->progname_null = 1;
-
-	if (username) {
-		(void) strlcpy(li->username, username, sizeof(li->username));
-		pw = getpwnam(li->username);
-		if (pw == NULL)
-			fatal("login_init_entry: Cannot find user \"%s\"", li->username);
-		li->uid = pw->pw_uid;
-	}
-
-	if (hostname)
-		(void) strlcpy(li->hostname, hostname, sizeof(li->hostname));
-
-	return 1;
-}
-
-/* login_set_current_time(struct logininfo *)    - set the current time
- *
- * Set the current time in a logininfo structure. This function is
- * meant to eliminate the need to deal with system dependencies for
- * time handling.
- */
-void
-login_set_current_time(struct logininfo *li)
-{
-	struct timeval tv;
-
-	(void) gettimeofday(&tv, NULL);
-
-	li->tv_sec = tv.tv_sec;
-	li->tv_usec = tv.tv_usec;
-}
-
-/* copy a sockaddr_* into our logininfo */
-void
-login_set_addr(struct logininfo *li, const struct sockaddr *sa,
-	       const unsigned int sa_size)
-{
-	unsigned int bufsize = sa_size;
-
-	/* make sure we don't overrun our union */
-	if (sizeof(li->hostaddr) < sa_size)
-		bufsize = sizeof(li->hostaddr);
-
-	(void) memcpy((void *)&(li->hostaddr.sa), (const void *)sa, bufsize);
-}
-
-
-/**
- ** login_write: Call low-level recording functions based on autoconf
- ** results
- **/
-int
-login_write (struct logininfo *li)
-{
-#ifndef HAVE_CYGWIN
-	if ((int)geteuid() != 0) {
-	  log("Attempt to write login records by non-root user (aborting)");
-	  return 1;
-	}
-#endif
-
-	/* set the timestamp */
-	login_set_current_time(li);
-#ifdef USE_LOGIN
-	syslogin_write_entry(li);
-#endif
-#ifdef USE_LASTLOG
-	if (li->type == LTYPE_LOGIN) {
-		(void) lastlog_write_entry(li);
-	}
-#endif
-#ifdef USE_UTMP
-	utmp_write_entry(li);
-#endif
-#ifdef USE_WTMP
-	wtmp_write_entry(li);
-#endif
-#ifdef USE_UTMPX
-	(void) utmpx_write_entry(li);
-#endif
-#ifdef USE_WTMPX
-	(void) wtmpx_write_entry(li);
-#endif
-	return 0;
-}
-
-/*
- * 'line' string utility functions
- *
- * These functions process the 'line' string into one of three forms:
- *
- * 1. The full filename (including '/dev')
- * 2. The stripped name (excluding '/dev')
- * 3. The abbreviated name (e.g. /dev/ttyp00 -> yp00
- *                               /dev/pts/1  -> ts/1 )
- *
- * Form 3 is used on some systems to identify a .tmp.? entry when
- * attempting to remove it. Typically both addition and removal is
- * performed by one application - say, sshd - so as long as the choice
- * uniquely identifies a terminal it's ok.
- */
-
-
-/* line_fullname(): add the leading '/dev/' if it doesn't exist make
- * sure dst has enough space, if not just copy src (ugh) */
-char *
-line_fullname(char *dst, const char *src, int dstsize)
-{
-	(void) memset(dst, '\0', dstsize);
-	/* "sshd" is special, like "ftp" */
-	if (strcmp(src, "sshd") ||
-	    ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5)))) {
-		(void) strlcpy(dst, src, dstsize);
-	} else {
-		(void) strlcpy(dst, "/dev/", dstsize);
-		(void) strlcat(dst, src, dstsize);
-	}
-	return dst;
-}
-
-/* line_stripname(): strip the leading '/dev' if it exists, return dst */
-char *
-line_stripname(char *dst, const char *src, int dstsize)
-{
-	(void) memset(dst, '\0', dstsize);
-	if (strncmp(src, "/dev/", 5) == 0)
-		(void) strlcpy(dst, src + 5, dstsize);
-	else
-		(void) strlcpy(dst, src, dstsize);
-	return dst;
-}
-
-/* line_abbrevname(): Return the abbreviated (usually four-character)
- * form of the line (Just use the last <dstsize> characters of the
- * full name.)
- *
- * NOTE: use strncpy because we do NOT necessarily want zero
- * termination */
-char *
-line_abbrevname(char *dst, const char *src, int dstsize)
-{
-	size_t len;
-
-	(void) memset(dst, '\0', dstsize);
-
-	/* Always skip prefix if present */
-	if (strncmp(src, "/dev/", 5) == 0)
-		src += 5;
-
-#ifdef WITH_ABBREV_NO_TTY
-	if (strncmp(src, "tty", 3) == 0)
-		src += 3;
-#endif
-
-	len = strlen(src);
-
-	if (len > 0) {
-		if (((int)len - dstsize) > 0)
-			src +=  ((int)len - dstsize);
-
-		/* note: _don't_ change this to strlcpy */
-		(void) strncpy(dst, src, (size_t)dstsize);
-	}
-
-	return dst;
-}
-
-/**
- ** utmp utility functions
- **
- ** These functions manipulate struct utmp, taking system differences
- ** into account.
- **/
-
-#if defined(USE_UTMP) || defined (USE_WTMP) || defined (USE_LOGIN)
-
-/* build the utmp structure */
-void
-set_utmp_time(struct logininfo *li, struct utmp *ut)
-{
-# ifdef HAVE_TV_IN_UTMP
-	ut->ut_tv.tv_sec = li->tv_sec;
-	ut->ut_tv.tv_usec = li->tv_usec;
-# else
-#  ifdef HAVE_TIME_IN_UTMP
-	ut->ut_time = li->tv_sec;
-#  endif
-# endif
-}
-
-void
-construct_utmp(struct logininfo *li,
-		    struct utmp *ut)
-{
-	(void) memset(ut, '\0', sizeof(*ut));
-
-	/* First fill out fields used for both logins and logouts */
-
-# ifdef HAVE_ID_IN_UTMP
-	(void) line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id));
-# endif
-
-# ifdef HAVE_TYPE_IN_UTMP
-	/* This is done here to keep utmp constants out of struct logininfo */
-	switch (li->type) {
-	case LTYPE_LOGIN:
-		ut->ut_type = USER_PROCESS;
-#ifdef _UNICOS
-		cray_set_tmpdir(ut);
-#endif
-		break;
-	case LTYPE_LOGOUT:
-		ut->ut_type = DEAD_PROCESS;
-#ifdef _UNICOS
-		cray_retain_utmp(ut, li->pid);
-#endif
-		break;
-	}
-# endif
-	set_utmp_time(li, ut);
-
-	(void) line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line));
-
-# ifdef HAVE_PID_IN_UTMP
-	ut->ut_pid = li->pid;
-# endif
-
-	/* If we're logging out, leave all other fields blank */
-	if (li->type == LTYPE_LOGOUT)
-	  return;
-
-	/*
-	 * These fields are only used when logging in, and are blank
-	 * for logouts.
-	 */
-
-	/* Use strncpy because we don't necessarily want null termination */
-	(void) strncpy(ut->ut_name, li->username, MIN_SIZEOF(ut->ut_name, li->username));
-# ifdef HAVE_HOST_IN_UTMP
-	(void) strncpy(ut->ut_host, li->hostname, MIN_SIZEOF(ut->ut_host, li->hostname));
-# endif
-# ifdef HAVE_ADDR_IN_UTMP
-	/* this is just a 32-bit IP address */
-	if (li->hostaddr.sa.sa_family == AF_INET)
-		ut->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr;
-# endif
-}
-#endif /* USE_UTMP || USE_WTMP || USE_LOGIN */
-
-/**
- ** utmpx utility functions
- **
- ** These functions manipulate struct utmpx, accounting for system
- ** variations.
- **/
-
-#if defined(USE_UTMPX) || defined (USE_WTMPX)
-/* build the utmpx structure */
-void
-set_utmpx_time(struct logininfo *li, struct utmpx *utx)
-{
-# ifdef HAVE_TV_IN_UTMPX
-	utx->ut_tv.tv_sec = li->tv_sec;
-	utx->ut_tv.tv_usec = li->tv_usec;
-# else /* HAVE_TV_IN_UTMPX */
-#  ifdef HAVE_TIME_IN_UTMPX
-	utx->ut_time = li->tv_sec;
-#  endif /* HAVE_TIME_IN_UTMPX */
-# endif /* HAVE_TV_IN_UTMPX */
-}
-
-void
-construct_utmpx(struct logininfo *li, struct utmpx *utx)
-{
-	(void) memset(utx, '\0', sizeof(*utx));
-# ifdef HAVE_ID_IN_UTMPX
-	(void) line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id));
-# endif
-
-	/* this is done here to keep utmp constants out of loginrec.h */
-	switch (li->type) {
-	case LTYPE_LOGIN:
-		utx->ut_type = USER_PROCESS;
-		break;
-	case LTYPE_LOGOUT:
-		utx->ut_type = DEAD_PROCESS;
-		break;
-	}
-	if (!li->line_null)
-		(void) line_stripname(utx->ut_line, li->line, sizeof(utx->ut_line));
-	else if (!li->progname_null)
-		(void) line_stripname(utx->ut_line, li->progname, sizeof(utx->ut_line));
-
-	set_utmpx_time(li, utx);
-	utx->ut_pid = li->pid;
-	/* strncpy(): Don't necessarily want null termination */
-	(void) strncpy(utx->ut_name, li->username, MIN_SIZEOF(utx->ut_name, li->username));
-
-	if (li->type == LTYPE_LOGOUT)
-		return;
-
-	/*
-	 * These fields are only used when logging in, and are blank
-	 * for logouts.
-	 */
-
-# ifdef HAVE_HOST_IN_UTMPX
-	(void) strncpy(utx->ut_host, li->hostname, MIN_SIZEOF(utx->ut_host, li->hostname));
-# endif
-# ifdef HAVE_ADDR_IN_UTMPX
-	/* this is just a 32-bit IP address */
-	if (li->hostaddr.sa.sa_family == AF_INET)
-		utx->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr;
-# endif
-# ifdef HAVE_SYSLEN_IN_UTMPX
-	/* ut_syslen is the length of the utx_host string */
-	utx->ut_syslen = MIN(strlen(li->hostname), sizeof(utx->ut_host));
-# endif
-}
-#endif /* USE_UTMPX || USE_WTMPX */
-
-/**
- ** Low-level utmp functions
- **/
-
-/* FIXME: (ATL) utmp_write_direct needs testing */
-#ifdef USE_UTMP
-
-/* if we can, use pututline() etc. */
-# if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \
-	defined(HAVE_PUTUTLINE)
-#  define UTMP_USE_LIBRARY
-# endif
-
-
-/* write a utmp entry with the system's help (pututline() and pals) */
-# ifdef UTMP_USE_LIBRARY
-static int
-utmp_write_library(struct logininfo *li, struct utmp *ut)
-{
-	setutent();
-	pututline(ut);
-
-#  ifdef HAVE_ENDUTENT
-	endutent();
-#  endif
-	return 1;
-}
-# else /* UTMP_USE_LIBRARY */
-
-/* write a utmp entry direct to the file */
-/* This is a slightly modification of code in OpenBSD's login.c */
-static int
-utmp_write_direct(struct logininfo *li, struct utmp *ut)
-{
-	struct utmp old_ut;
-	register int fd;
-	int tty;
-
-	/* FIXME: (ATL) ttyslot() needs local implementation */
-
-#if defined(HAVE_GETTTYENT)
-	register struct ttyent *ty;
-
-	tty=0;
-
-	setttyent();
-	while ((struct ttyent *)0 != (ty = getttyent())) {
-		tty++;
-		if (!strncmp(ty->ty_name, ut->ut_line, sizeof(ut->ut_line)))
-			break;
-	}
-	endttyent();
-
-	if((struct ttyent *)0 == ty) {
-		log("utmp_write_entry: tty not found");
-		return(1);
-	}
-#else /* FIXME */
-
-	tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */
-
-#endif /* HAVE_GETTTYENT */
-
-	if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) {
-		(void)lseek(fd, (off_t)(tty * sizeof(struct utmp)), SEEK_SET);
-		/*
-		 * Prevent luser from zero'ing out ut_host.
-		 * If the new ut_line is empty but the old one is not
-		 * and ut_line and ut_name match, preserve the old ut_line.
-		 */
-		if (atomicio(read, fd, &old_ut, sizeof(old_ut)) == sizeof(old_ut) &&
-			(ut->ut_host[0] == '\0') && (old_ut.ut_host[0] != '\0') &&
-			(strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0) &&
-			(strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0)) {
-			(void)memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host));
-		}
-
-		(void)lseek(fd, (off_t)(tty * sizeof(struct utmp)), SEEK_SET);
-		if (atomicio(write, fd, ut, sizeof(*ut)) != sizeof(*ut))
-			log("utmp_write_direct: error writing %s: %s",
-			    UTMP_FILE, strerror(errno));
-
-		(void)close(fd);
-		return 1;
-	} else {
-		return 0;
-	}
-}
-# endif /* UTMP_USE_LIBRARY */
-
-static int
-utmp_perform_login(struct logininfo *li)
-{
-	struct utmp ut;
-
-	construct_utmp(li, &ut);
-# ifdef UTMP_USE_LIBRARY
-	if (!utmp_write_library(li, &ut)) {
-		log("utmp_perform_login: utmp_write_library() failed");
-		return 0;
-	}
-# else
-	if (!utmp_write_direct(li, &ut)) {
-		log("utmp_perform_login: utmp_write_direct() failed");
-		return 0;
-	}
-# endif
-	return 1;
-}
-
-
-static int
-utmp_perform_logout(struct logininfo *li)
-{
-	struct utmp ut;
-
-	construct_utmp(li, &ut);
-# ifdef UTMP_USE_LIBRARY
-	if (!utmp_write_library(li, &ut)) {
-		log("utmp_perform_logout: utmp_write_library() failed");
-		return 0;
-	}
-# else
-	if (!utmp_write_direct(li, &ut)) {
-		log("utmp_perform_logout: utmp_write_direct() failed");
-		return 0;
-	}
-# endif
-	return 1;
-}
-
-
-int
-utmp_write_entry(struct logininfo *li)
-{
-	if (li->line_null) {
-		debug3("not writing utmp entry");
-		return 1;
-	}
-	debug3("writing utmp entry");
-
-	switch(li->type) {
-	case LTYPE_LOGIN:
-		return utmp_perform_login(li);
-
-	case LTYPE_LOGOUT:
-		return utmp_perform_logout(li);
-
-	default:
-		log("utmp_write_entry: invalid type field");
-		return 0;
-	}
-}
-#endif /* USE_UTMP */
-
-
-/**
- ** Low-level utmpx functions
- **/
-
-/* not much point if we don't want utmpx entries */
-#ifdef USE_UTMPX
-
-/* if we have the wherewithall, use pututxline etc. */
-# if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) && \
-	defined(HAVE_PUTUTXLINE)
-#  define UTMPX_USE_LIBRARY
-# endif
-
-
-/* write a utmpx entry with the system's help (pututxline() and pals) */
-# ifdef UTMPX_USE_LIBRARY
-static int
-utmpx_write_library(struct logininfo *li, struct utmpx *utx)
-{
-	setutxent();
-	(void) pututxline(utx);
-
-#  ifdef HAVE_ENDUTXENT
-	endutxent();
-#  endif
-	return 1;
-}
-
-# else /* UTMPX_USE_LIBRARY */
-
-/* write a utmp entry direct to the file */
-static int
-utmpx_write_direct(struct logininfo *li, struct utmpx *utx)
-{
-	log("utmpx_write_direct: not implemented!");
-	return 0;
-}
-# endif /* UTMPX_USE_LIBRARY */
-
-static int
-utmpx_perform_login(struct logininfo *li)
-{
-	struct utmpx utx;
-
-	construct_utmpx(li, &utx);
-# ifdef UTMPX_USE_LIBRARY
-	if (!utmpx_write_library(li, &utx)) {
-		log("tmpx_perform_login: utmp_write_library() failed");
-		return 0;
-	}
-# else
-	if (!utmpx_write_direct(li, &ut)) {
-		log("utmpx_perform_login: utmp_write_direct() failed");
-		return 0;
-	}
-# endif
-	return 1;
-}
-
-
-static int
-utmpx_perform_logout(struct logininfo *li)
-{
-	struct utmpx utx;
-
-	construct_utmpx(li, &utx);
-# ifdef HAVE_ID_IN_UTMPX
-	(void) line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id));
-# endif
-# ifdef HAVE_TYPE_IN_UTMPX
-	utx.ut_type = DEAD_PROCESS;
-# endif
-
-# ifdef UTMPX_USE_LIBRARY
-	(void) utmpx_write_library(li, &utx);
-# else
-	utmpx_write_direct(li, &utx);
-# endif
-	return 1;
-}
-
-int
-utmpx_write_entry(struct logininfo *li)
-{
-	if (li->line_null) {
-		debug3("not writing utmpx entry");
-		return 1;
-	}
-	debug3("writing utmpx entry");
-
-	switch(li->type) {
-	case LTYPE_LOGIN:
-		return utmpx_perform_login(li);
-	case LTYPE_LOGOUT:
-		return utmpx_perform_logout(li);
-	default:
-		log("utmpx_write_entry: invalid type field");
-		return 0;
-	}
-}
-#endif /* USE_UTMPX */
-
-
-/**
- ** Low-level wtmp functions
- **/
-
-#ifdef USE_WTMP
-
-/* write a wtmp entry direct to the end of the file */
-/* This is a slight modification of code in OpenBSD's logwtmp.c */
-static int
-wtmp_write(struct logininfo *li, struct utmp *ut)
-{
-	struct stat buf;
-	int fd, ret = 1;
-
-	if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) {
-		log("wtmp_write: problem writing %s: %s",
-		    WTMP_FILE, strerror(errno));
-		return 0;
-	}
-	if (fstat(fd, &buf) == 0)
-		if (atomicio(write, fd, ut, sizeof(*ut)) != sizeof(*ut)) {
-			(void) ftruncate(fd, buf.st_size);
-			log("wtmp_write: problem writing %s: %s",
-			    WTMP_FILE, strerror(errno));
-			ret = 0;
-		}
-	(void)close(fd);
-	return ret;
-}
-
-static int
-wtmp_perform_login(struct logininfo *li)
-{
-	struct utmp ut;
-
-	construct_utmp(li, &ut);
-	return wtmp_write(li, &ut);
-}
-
-
-static int
-wtmp_perform_logout(struct logininfo *li)
-{
-	struct utmp ut;
-
-	construct_utmp(li, &ut);
-	return wtmp_write(li, &ut);
-}
-
-
-int
-wtmp_write_entry(struct logininfo *li)
-{
-	switch(li->type) {
-	case LTYPE_LOGIN:
-		return wtmp_perform_login(li);
-	case LTYPE_LOGOUT:
-		return wtmp_perform_logout(li);
-	default:
-		log("wtmp_write_entry: invalid type field");
-		return 0;
-	}
-}
-
-
-/* Notes on fetching login data from wtmp/wtmpx
- *
- * Logouts are usually recorded with (amongst other things) a blank
- * username on a given tty line.  However, some systems (HP-UX is one)
- * leave all fields set, but change the ut_type field to DEAD_PROCESS.
- *
- * Since we're only looking for logins here, we know that the username
- * must be set correctly. On systems that leave it in, we check for
- * ut_type==USER_PROCESS (indicating a login.)
- *
- * Portability: Some systems may set something other than USER_PROCESS
- * to indicate a login process. I don't know of any as I write. Also,
- * it's possible that some systems may both leave the username in
- * place and not have ut_type.
- */
-
-/* return true if this wtmp entry indicates a login */
-static int
-wtmp_islogin(struct logininfo *li, struct utmp *ut)
-{
-	if (strncmp(li->username, ut->ut_name,
-		MIN_SIZEOF(li->username, ut->ut_name)) == 0) {
-# ifdef HAVE_TYPE_IN_UTMP
-		if (ut->ut_type & USER_PROCESS)
-			return 1;
-# else
-		return 1;
-# endif
-	}
-	return 0;
-}
-
-int
-wtmp_get_entry(struct logininfo *li)
-{
-	struct stat st;
-	struct utmp ut;
-	int fd, found=0;
-
-	/* Clear the time entries in our logininfo */
-	li->tv_sec = li->tv_usec = 0;
-
-	if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) {
-		log("wtmp_get_entry: problem opening %s: %s",
-		    WTMP_FILE, strerror(errno));
-		return 0;
-	}
-	if (fstat(fd, &st) != 0) {
-		log("wtmp_get_entry: couldn't stat %s: %s",
-		    WTMP_FILE, strerror(errno));
-		(void) close(fd);
-		return 0;
-	}
-
-	/* Seek to the start of the last struct utmp */
-	if (lseek(fd, -(off_t)sizeof(struct utmp), SEEK_END) == -1) {
-		/* Looks like we've got a fresh wtmp file */
-		(void) close(fd);
-		return 0;
-	}
-
-	while (!found) {
-		if (atomicio(read, fd, &ut, sizeof(ut)) != sizeof(ut)) {
-			log("wtmp_get_entry: read of %s failed: %s",
-			    WTMP_FILE, strerror(errno));
-			(void) close (fd);
-			return 0;
-		}
-		if ( wtmp_islogin(li, &ut) ) {
-			found = 1;
-			/* We've already checked for a time in struct
-			 * utmp, in login_getlast(). */
-# ifdef HAVE_TIME_IN_UTMP
-			li->tv_sec = ut.ut_time;
-# else
-#  if HAVE_TV_IN_UTMP
-			li->tv_sec = ut.ut_tv.tv_sec;
-#  endif
-# endif
-			(void) line_fullname(li->line, ut.ut_line,
-				      MIN_SIZEOF(li->line, ut.ut_line));
-# ifdef HAVE_HOST_IN_UTMP
-			(void) strlcpy(li->hostname, ut.ut_host,
-				MIN_SIZEOF(li->hostname, ut.ut_host));
-# endif
-			continue;
-		}
-		/* Seek back 2 x struct utmp */
-		if (lseek(fd, -(off_t)(2 * sizeof(struct utmp)), SEEK_CUR) == -1) {
-			/* We've found the start of the file, so quit */
-			(void) close (fd);
-			return 0;
-		}
-	}
-
-	/* We found an entry. Tidy up and return */
-	(void) close(fd);
-	return 1;
-}
-# endif /* USE_WTMP */
-
-
-/**
- ** Low-level wtmpx functions
- **/
-
-#ifdef USE_WTMPX
-/* write a wtmpx entry direct to the end of the file */
-/* This is a slight modification of code in OpenBSD's logwtmp.c */
-static int
-wtmpx_write(struct logininfo *li, struct utmpx *utx)
-{
-	struct stat buf;
-	int fd, ret = 1;
-
-	if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) {
-		log("wtmpx_write: problem opening %s: %s",
-		    WTMPX_FILE, strerror(errno));
-		return 0;
-	}
-
-	if (fstat(fd, &buf) == 0)
-		if (atomicio(write, fd, utx, sizeof(*utx)) != sizeof(*utx)) {
-			(void) ftruncate(fd, buf.st_size);
-			log("wtmpx_write: problem writing %s: %s",
-			    WTMPX_FILE, strerror(errno));
-			ret = 0;
-		}
-	(void)close(fd);
-
-	return ret;
-}
-
-
-static int
-wtmpx_perform_login(struct logininfo *li)
-{
-	struct utmpx utx;
-
-	construct_utmpx(li, &utx);
-	return wtmpx_write(li, &utx);
-}
-
-
-static int
-wtmpx_perform_logout(struct logininfo *li)
-{
-	struct utmpx utx;
-
-	construct_utmpx(li, &utx);
-	return wtmpx_write(li, &utx);
-}
-
-
-int
-wtmpx_write_entry(struct logininfo *li)
-{
-	switch(li->type) {
-	case LTYPE_LOGIN:
-		return wtmpx_perform_login(li);
-	case LTYPE_LOGOUT:
-		return wtmpx_perform_logout(li);
-	default:
-		log("wtmpx_write_entry: invalid type field");
-		return 0;
-	}
-}
-
-/* Please see the notes above wtmp_islogin() for information about the
-   next two functions */
-
-/* Return true if this wtmpx entry indicates a login */
-static int
-wtmpx_islogin(struct logininfo *li, struct utmpx *utx)
-{
-	if ( strncmp(li->username, utx->ut_name,
-		MIN_SIZEOF(li->username, utx->ut_name)) == 0 ) {
-# ifdef HAVE_TYPE_IN_UTMPX
-		if (utx->ut_type == USER_PROCESS)
-			return 1;
-# else
-		return 1;
-# endif
-	}
-	return 0;
-}
-
-
-#if 0
-int
-wtmpx_get_entry(struct logininfo *li)
-{
-	struct stat st;
-	struct utmpx utx;
-	int fd, found=0;
-
-	/* Clear the time entries */
-	li->tv_sec = li->tv_usec = 0;
-
-	if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) {
-		log("wtmpx_get_entry: problem opening %s: %s",
-		    WTMPX_FILE, strerror(errno));
-		return 0;
-	}
-	if (fstat(fd, &st) != 0) {
-		log("wtmpx_get_entry: couldn't stat %s: %s",
-		    WTMPX_FILE, strerror(errno));
-		(void) close(fd);
-		return 0;
-	}
-
-	/* Seek to the start of the last struct utmpx */
-	if (lseek(fd, -(off_t)sizeof(struct utmpx), SEEK_END) == -1 ) {
-		/* probably a newly rotated wtmpx file */
-		(void) close(fd);
-		return 0;
-	}
-
-	while (!found) {
-		if (atomicio(read, fd, &utx, sizeof(utx)) != sizeof(utx)) {
-			log("wtmpx_get_entry: read of %s failed: %s",
-			    WTMPX_FILE, strerror(errno));
-			(void) close (fd);
-			return 0;
-		}
-		/* Logouts are recorded as a blank username on a particular line.
-		 * So, we just need to find the username in struct utmpx */
-		if ( wtmpx_islogin(li, &utx) ) {
-			found = 1;
-# ifdef HAVE_TV_IN_UTMPX
-			li->tv_sec = utx.ut_tv.tv_sec;
-# else
-#  ifdef HAVE_TIME_IN_UTMPX
-			li->tv_sec = utx.ut_time;
-#  endif
-# endif
-			(void) line_fullname(li->line, utx.ut_line, sizeof(li->line));
-# ifdef HAVE_HOST_IN_UTMPX
-			(void) strlcpy(li->hostname, utx.ut_host,
-				MIN_SIZEOF(li->hostname, utx.ut_host));
-# endif
-			continue;
-		}
-		if (lseek(fd, -(off_t)(2 * sizeof(struct utmpx)), SEEK_CUR) == -1) {
-			(void) close (fd);
-			return 0;
-		}
-	}
-
-	(void) close(fd);
-	return 1;
-}
-#endif
-#endif /* USE_WTMPX */
-
-/**
- ** Low-level libutil login() functions
- **/
-
-#ifdef USE_LOGIN
-static int
-syslogin_perform_login(struct logininfo *li)
-{
-	struct utmp *ut;
-
-	if (! (ut = (struct utmp *)malloc(sizeof(*ut)))) {
-		log("syslogin_perform_login: couldn't malloc()");
-		return 0;
-	}
-	construct_utmp(li, ut);
-	login(ut);
-
-	return 1;
-}
-
-static int
-syslogin_perform_logout(struct logininfo *li)
-{
-# ifdef HAVE_LOGOUT
-	char line[8];
-
-	(void)line_stripname(line, li->line, sizeof(line));
-
-	if (!logout(line)) {
-		log("syslogin_perform_logout: logout() returned an error");
-#  ifdef HAVE_LOGWTMP
-	} else {
-		logwtmp(line, "", "");
-#  endif
-	}
-	/* FIXME: (ATL - if the need arises) What to do if we have
-	 * login, but no logout?  what if logout but no logwtmp? All
-	 * routines are in libutil so they should all be there,
-	 * but... */
-# endif
-	return 1;
-}
-
-int
-syslogin_write_entry(struct logininfo *li)
-{
-	switch (li->type) {
-	case LTYPE_LOGIN:
-		return syslogin_perform_login(li);
-	case LTYPE_LOGOUT:
-		return syslogin_perform_logout(li);
-	default:
-		log("syslogin_write_entry: Invalid type field");
-		return 0;
-	}
-}
-#endif /* USE_LOGIN */
-
-/* end of file log-syslogin.c */
-
-/**
- ** Low-level lastlog functions
- **/
-
-#ifdef USE_LASTLOG
-#define LL_FILE 1
-#define LL_DIR 2
-#define LL_OTHER 3
-
-static void
-lastlog_construct(struct logininfo *li, struct lastlog *last)
-{
-	/* clear the structure */
-	(void) memset(last, '\0', sizeof(*last));
-
-	(void)line_stripname(last->ll_line, li->line, sizeof(last->ll_line));
-	(void) strlcpy(last->ll_host, li->hostname,
-		MIN_SIZEOF(last->ll_host, li->hostname));
-	last->ll_time = li->tv_sec;
-}
-
-static int
-lastlog_filetype(char *filename)
-{
-	struct stat st;
-
-	if (stat(LASTLOG_FILE, &st) != 0) {
-		log("lastlog_perform_login: Couldn't stat %s: %s", LASTLOG_FILE,
-			strerror(errno));
-		return 0;
-	}
-	if (S_ISDIR(st.st_mode))
-		return LL_DIR;
-	else if (S_ISREG(st.st_mode))
-		return LL_FILE;
-	else
-		return LL_OTHER;
-}
-
-
-/* open the file (using filemode) and seek to the login entry */
-static int
-lastlog_openseek(struct logininfo *li, int *fd, int filemode)
-{
-	off_t offset;
-	int type;
-	char lastlog_file[1024];
-
-	type = lastlog_filetype(LASTLOG_FILE);
-	switch (type) {
-		case LL_FILE:
-			(void) strlcpy(lastlog_file, LASTLOG_FILE, sizeof(lastlog_file));
-			break;
-		case LL_DIR:
-			(void) snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s",
-				 LASTLOG_FILE, li->username);
-			break;
-		default:
-			log("lastlog_openseek: %.100s is not a file or directory!",
-			    LASTLOG_FILE);
-			return 0;
-	}
-
-	*fd = open(lastlog_file, filemode);
-	if ( *fd < 0) {
-		debug("lastlog_openseek: Couldn't open %s: %s",
-		    lastlog_file, strerror(errno));
-		return 0;
-	}
-
-	if (type == LL_FILE) {
-		/* find this uid's offset in the lastlog file */
-		offset = (off_t) ((long)li->uid * sizeof(struct lastlog));
-
-		if ( lseek(*fd, offset, SEEK_SET) != offset ) {
-			log("lastlog_openseek: %s->lseek(): %s",
-			 lastlog_file, strerror(errno));
-			return 0;
-		}
-	}
-
-	return 1;
-}
-
-static int
-lastlog_perform_login(struct logininfo *li)
-{
-	struct lastlog last;
-	int fd;
-
-	/* create our struct lastlog */
-	lastlog_construct(li, &last);
-
-	if (!lastlog_openseek(li, &fd, O_RDWR|O_CREAT))
-		return(0);
-
-	/* write the entry */
-	if (atomicio(write, fd, &last, sizeof(last)) != sizeof(last)) {
-		(void) close(fd);
-		log("lastlog_write_filemode: Error writing to %s: %s",
-		    LASTLOG_FILE, strerror(errno));
-		return 0;
-	}
-
-	(void) close(fd);
-	return 1;
-}
-
-int
-lastlog_write_entry(struct logininfo *li)
-{
-	switch(li->type) {
-	case LTYPE_LOGIN:
-		return lastlog_perform_login(li);
-	default:
-		log("lastlog_write_entry: Invalid type field");
-		return 0;
-	}
-}
-
-static void
-lastlog_populate_entry(struct logininfo *li, struct lastlog *last)
-{
-	(void) line_fullname(li->line, last->ll_line, sizeof(li->line));
-	(void) strlcpy(li->hostname, last->ll_host,
-		MIN_SIZEOF(li->hostname, last->ll_host));
-	li->tv_sec = last->ll_time;
-}
-
-int
-lastlog_get_entry(struct logininfo *li)
-{
-	struct lastlog last;
-	int fd, ret;
-
-	if (!lastlog_openseek(li, &fd, O_RDONLY))
-		return (0);
-
-	ret = atomicio(read, fd, &last, sizeof(last));
-	close(fd);
-
-	switch (ret) {
-	case 0:
-		memset(&last, '\0', sizeof(last));
-		/* FALLTHRU */
-	case sizeof(last):
-		lastlog_populate_entry(li, &last);
-		return (1);
-	case -1:
-		error("%s: Error reading from %s: %s", __func__,
-		    LASTLOG_FILE, strerror(errno));
-		return (0);
-	default:
-		error("%s: Error reading from %s: Expecting %d, got %d",
-		    __func__, LASTLOG_FILE, (int)sizeof(last), ret);
-		return (0);
-	}
-
-	/* NOTREACHED */
-	return (0);
-}
-#endif /* USE_LASTLOG */
