diff -ur proftpd-1.3.1rc2/acconfig.h proftpd-1.3.1rc2.wtmpx/acconfig.h
--- proftpd-1.3.1rc2/acconfig.h	2002-12-15 19:05:09.000000000 +0100
+++ proftpd-1.3.1rc2.wtmpx/acconfig.h	2007-08-20 14:44:18.000000000 +0200
@@ -70,7 +70,7 @@
 #undef HAVE_UT_UT_HOST
 
 /* Define if your struct utmp uses ut_user and not ut_name */
-#undef HAVE_UTMAXTYPE
+#undef HAVE_UT_UT_USER
 
 #define PF_ARGV_NONE		0
 #define PF_ARGV_NEW		1
diff -ur proftpd-1.3.1rc2/config.h.in proftpd-1.3.1rc2.wtmpx/config.h.in
--- proftpd-1.3.1rc2/config.h.in	2007-08-20 14:47:10.000000000 +0200
+++ proftpd-1.3.1rc2.wtmpx/config.h.in	2007-08-20 14:44:18.000000000 +0200
@@ -119,7 +119,7 @@
 #undef HAVE_UT_UT_HOST
 
 /* Define if your struct utmp uses ut_user and not ut_name */
-#undef HAVE_UTMAXTYPE
+#undef HAVE_UT_UT_USER
 
 #define PF_ARGV_NONE		0
 #define PF_ARGV_NEW		1
diff -ur proftpd-1.3.1rc2/configure.in proftpd-1.3.1rc2.wtmpx/configure.in
--- proftpd-1.3.1rc2/configure.in	2007-08-20 14:47:10.000000000 +0200
+++ proftpd-1.3.1rc2.wtmpx/configure.in	2007-08-20 14:44:18.000000000 +0200
@@ -1056,7 +1056,7 @@
 AC_CHECK_HEADERS(sys/stat.h errno.h sys/socket.h sys/termios.h sys/termio.h)
 AC_CHECK_HEADERS(sys/statvfs.h sys/un.h sys/vfs.h sys/select.h)
 AC_CHECK_HEADERS(dirent.h ndir.h sys/ndir.h sys/dir.h vmsdir.h)
-AC_CHECK_HEADERS(ucontext.h utime.h utmpx.h)
+AC_CHECK_HEADERS(ucontext.h utime.h)
 AC_CHECK_HEADERS(regex.h)
 AC_CHECK_HEADER(syslog.h,have_syslog_h="yes",)
 AC_CHECK_HEADERS(curses.h ncurses.h)
@@ -1119,10 +1119,10 @@
 
 if test $have_utmp; then
   AC_CACHE_CHECK(whether your struct utmp has ut_user,
-  		pr_cv_header_utmaxtype,
+  		pr_cv_header_ut_user,
 	AC_EGREP_HEADER([ *ut_user.*;],utmp.h,
-			pr_cv_header_utmaxtype="yes",
-			pr_cv_header_utmaxtype="no"))
+			pr_cv_header_ut_user="yes",
+			pr_cv_header_ut_user="no"))
   AC_CACHE_CHECK(whether your struct utmp has ut_host,
   		pr_cv_header_ut_host,
 	AC_EGREP_HEADER([ *ut_host.*;],utmp.h,
@@ -1133,8 +1133,8 @@
 	AC_EGREP_HEADER([ *ut_exit.*;],utmp.h,
 			pr_cv_header_ut_exit="yes",
 			pr_cv_header_ut_exit="no"))
-  if test "$pr_cv_header_utmaxtype" = "yes"; then
-    AC_DEFINE(HAVE_UTMAXTYPE, 1, [If struct utmp has ut_user.])
+  if test "$pr_cv_header_ut_user" = "yes"; then
+    AC_DEFINE(HAVE_UT_UT_USER, 1, [If struct utmp has ut_user.])
   fi
   if test "$pr_cv_header_ut_host" = "yes"; then
     AC_DEFINE(HAVE_UT_UT_HOST, 1, [If struct utmp has ut_host.])
@@ -1144,6 +1144,28 @@
   fi
 fi
 
+dnl See what type of utmp exists
+AC_CHECK_HEADERS(utmpx.h, have_utmpx=1, have_utmpx=0)
+
+if test $have_utmpx; then
+  AC_CACHE_CHECK(whether your struct utmpx has ut_exit,
+		pr_cv_header_utx_exit,
+	AC_EGREP_HEADER([ *ut_exit.*;],utmpx.h,
+			pr_cv_header_utx_exit="yes",
+			pr_cv_header_utx_exit="no"))
+  AC_CACHE_CHECK(whether your struct utmpx has ut_syslen,
+		pr_cv_header_utx_syslen,
+	AC_EGREP_HEADER([ *ut_syslen.*;],utmpx.h,
+			pr_cv_header_utx_syslen="yes",
+			pr_cv_header_utx_syslen="no"))
+  if test "$pr_cv_header_utx_exit" = "yes"; then
+    AC_DEFINE(HAVE_UTX_UT_EXIT, 1, [If struct utmpx has ut_exit.])
+  fi
+  if test "$pr_cv_header_utx_syslen" = "yes"; then
+    AC_DEFINE(HAVE_UTX_UT_SYSLEN, 1, [If struct utmpx has ut_syslen.])
+  fi
+fi
+
 dnl See if various LOG_ macros are defined
 if test "$have_syslog_h" = "yes"; then
   AC_DEFINE(HAVE_SYSLOG_H)
diff -ur proftpd-1.3.1rc2/src/log.c proftpd-1.3.1rc2.wtmpx/src/log.c
--- proftpd-1.3.1rc2/src/log.c	2006-12-11 20:53:43.000000000 +0100
+++ proftpd-1.3.1rc2.wtmpx/src/log.c	2007-08-20 14:52:13.000000000 +0200
@@ -59,119 +59,124 @@
   int res = 0;
   static int fd = -1;
 
-#if ((defined(SVR4) || defined(__SVR4)) || \
-    (defined(__NetBSD__) && defined(HAVE_UTMPX_H))) && \
-    !(defined(LINUX) || defined(__hpux) || defined (_AIX))
-  /* This "auxilliary" utmp doesn't exist under linux. */
-#if defined(__sparcv9) && !defined(__NetBSD__)
-  struct futmpx utx;
-  time_t t;
-#else
-  struct utmpx utx;
-#endif
+#if defined(HAVE_UTMPX_H)
+  char *wtmpx_file = NULL;
   static int fdx = -1;
 
 #if !defined(WTMPX_FILE) && defined(_PATH_WTMPX)
 # define WTMPX_FILE _PATH_WTMPX
 #endif
+  if (access(WTMPX_FILE, F_OK) == 0)
+    wtmpx_file = strdup(WTMPX_FILE);
+  else if (access(WTMPX_FILE"x", F_OK) == 0)
+    wtmpx_file = strdup(WTMPX_FILE"x");
 
-  if (fdx < 0 &&
-      (fdx = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) {
-    pr_log_pri(PR_LOG_WARNING, "wtmpx %s: %s", WTMPX_FILE, strerror(errno));
-    return -1;
-  }
+  if (fdx >= 0 || wtmpx_file != NULL)
+  {
+#if defined(__sparcv9) && !defined(__NetBSD__)
+    struct futmpx utx;
+#else
+    struct utmpx utx;
+    time_t t;
+#endif
 
-  /* Unfortunately, utmp string fields are terminated by '\0' if they are
-   * shorter than the size of the field, but if they are exactly the size of
-   * the field they don't have to be terminated at all.  Frankly, this sucks.
-   * Insane if you ask me.  Unless there's massive uproar, I prefer to err on
-   * the side of caution and always null-terminate our strings.
-   */
-  if (fstat(fdx, &buf) == 0) {
-    memset(&utx, 0, sizeof(utx));
+    if (fdx < 0 && (fdx = open(wtmpx_file, O_WRONLY|O_APPEND, 0)) < 0) {
+      pr_log_pri(PR_LOG_WARNING, "wtmpx %s: %s", wtmpx_file, strerror(errno));
+      return -1;
+    }
 
-    sstrncpy(utx.ut_user, name, sizeof(utx.ut_user));
-    sstrncpy(utx.ut_id, "ftp", sizeof(utx.ut_user));
-    sstrncpy(utx.ut_line, line, sizeof(utx.ut_line));
-    sstrncpy(utx.ut_host, host, sizeof(utx.ut_host));
-    utx.ut_pid = getpid();
-#if defined(__NetBSD__) && defined(HAVE_UTMPX_H)
-    memcpy(&utx.ut_ss, pr_netaddr_get_inaddr(ip), sizeof(utx.ut_ss));
-    gettimeofday(&utx.ut_tv, NULL);
-#else /* SVR4 */
-    utx.ut_syslen = strlen(utx.ut_host)+1;
-#  ifdef __sparcv9
-    time(&t);
-    utx.ut_tv.tv_sec = (time32_t)t;
-#  else
-    time(&utx.ut_tv.tv_sec);
-#  endif
-#endif /* SVR4 */
+    /* Unfortunately, utmp string fields are terminated by '\0' if they are
+     * shorter than the size of the field, but if they are exactly the size of
+     * the field they don't have to be terminated at all.  Frankly, this sucks.
+     * Insane if you ask me.  Unless there's massive uproar, I prefer to err on
+     * the side of caution and always null-terminate our strings.
+     */
+    if (fstat(fdx, &buf) == 0) {
+      memset(&utx, 0, sizeof(utx));
 
-    if (*name)
-      utx.ut_type = USER_PROCESS;
-    else
-      utx.ut_type = DEAD_PROCESS;
-#ifdef HAVE_UT_UT_EXIT
-    utx.ut_exit.e_termination = 0;
-    utx.ut_exit.e_exit = 0;
+      if (name && *name) {
+        sstrncpy(utx.ut_user, name, sizeof(utx.ut_user));
+        utx.ut_type = USER_PROCESS;
+      } else {
+        utx.ut_type = DEAD_PROCESS;
+      }
+      utx.ut_pid = getpid();
+      sstrncpy(utx.ut_line, line, sizeof(utx.ut_line));
+      sstrncpy(utx.ut_id, "ftp", sizeof(utx.ut_user));
+      if (host && *host)
+        sstrncpy(utx.ut_host, host, sizeof(utx.ut_host));
+#ifdef HAVE_UTX_UT_EXIT
+      utx.ut_exit.e_termination = 0;
+      utx.ut_exit.e_exit = 0;
 #endif /* HAVE_UT_UT_EXIT */
-    if (write(fdx, (char *)&utx, sizeof(utx)) != sizeof(utx))
-      ftruncate(fdx, buf.st_size);
 
-  } else {
-    pr_log_debug(DEBUG0, "%s fstat(): %s", WTMPX_FILE, strerror(errno));
-    res = -1;
-  }
+#ifdef HAVE_UTX_UT_SYSLEN
+      utx.ut_syslen = strlen(utx.ut_host)+1;
+#endif
+#if defined(__NetBSD__)
+      memcpy(&utx.ut_ss, pr_netaddr_get_inaddr(ip), sizeof(utx.ut_ss));
+      gettimeofday(&utx.ut_tv, NULL);
+#else
+      time(&t);
+      utx.ut_tv.tv_sec = t;
+#endif
 
-#else /* Non-SVR4 systems */
+      if (ip)
+#ifndef PR_USE_IPV6
+        memcpy(&utx.ut_addr, pr_netaddr_get_inaddr(ip), sizeof(utx.ut_addr));
+#else
+        memcpy(&utx.ut_addr_v6, pr_netaddr_get_inaddr(ip), sizeof(utx.ut_addr_v6));
+#endif /* !PR_USE_IPV6 */
 
-  if (fd < 0 &&
-      (fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) {
+      if (write(fdx, (char *)&utx, sizeof(utx)) != sizeof(utx))
+        ftruncate(fdx, buf.st_size);
+    } else {
+      pr_log_debug(DEBUG0, "%s fstat(): %s", wtmpx_file, strerror(errno));
+      res = -1;
+    }
+
+    free(wtmpx_file);
+    return res;
+  }
+#else /* HAVE_UTMPX_H */
+  if (fd < 0 && (fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) {
     pr_log_pri(PR_LOG_WARNING, "wtmp %s: %s", WTMP_FILE, strerror(errno));
     return -1;
   }
 
   if (fstat(fd, &buf) == 0) {
     memset(&ut, 0, sizeof(ut));
-#ifdef HAVE_UTMAXTYPE
-# ifdef LINUX
-    if (ip)
-#  ifndef PR_USE_IPV6
-      memcpy(&ut.ut_addr, pr_netaddr_get_inaddr(ip), sizeof(ut.ut_addr));
-#  else
-      memcpy(&ut.ut_addr_v6, pr_netaddr_get_inaddr(ip), sizeof(ut.ut_addr_v6));
-#  endif /* !PR_USE_IPV6 */
-# else
-    sstrncpy(ut.ut_id, "ftp", sizeof(ut.ut_id));
-#  ifdef HAVE_UT_UT_EXIT
-    ut.ut_exit.e_termination = 0;
-    ut.ut_exit.e_exit = 0;
-#  endif /* !HAVE_UT_UT_EXIT */
-# endif /* !LINUX */
-    sstrncpy(ut.ut_line, line, sizeof(ut.ut_line));
-    if (name && *name)
+    if (name && *name) {
+#ifdef HAVE_UT_UT_USER
       sstrncpy(ut.ut_user, name, sizeof(ut.ut_user));
-    ut.ut_pid = getpid();
-    if (name && *name)
+#else
+      sstrncpy(ut.ut_name, name, sizeof(ut.ut_name));
+#endif
       ut.ut_type = USER_PROCESS;
-    else
+    } else {
       ut.ut_type = DEAD_PROCESS;
-#else  /* !HAVE_UTMAXTYPE */
+    }
+    ut.ut_pid = getpid();
     sstrncpy(ut.ut_line, line, sizeof(ut.ut_line));
-    if (name && *name)
-      sstrncpy(ut.ut_name, name, sizeof(ut.ut_name));
-#endif /* HAVE_UTMAXTYPE */
-
+    sstrncpy(ut.ut_id, "ftp", sizeof(ut.ut_id));
 #ifdef HAVE_UT_UT_HOST
     if (host && *host)
       sstrncpy(ut.ut_host, host, sizeof(ut.ut_host));
 #endif /* HAVE_UT_UT_HOST */
-
+#ifdef HAVE_UT_UT_EXIT
+    ut.ut_exit.e_termination = 0;
+    ut.ut_exit.e_exit = 0;
+#endif /* !HAVE_UT_UT_EXIT */
     time(&ut.ut_time);
+    if (ip)
+#ifndef PR_USE_IPV6
+      memcpy(&ut.ut_addr, pr_netaddr_get_inaddr(ip), sizeof(ut.ut_addr));
+#else
+      memcpy(&ut.ut_addr_v6, pr_netaddr_get_inaddr(ip), sizeof(ut.ut_addr_v6));
+#endif /* !PR_USE_IPV6 */
+
     if (write(fd, (char *)&ut, sizeof(ut)) != sizeof(ut))
       ftruncate(fd, buf.st_size);
-
   } else {
     pr_log_debug(DEBUG0, "%s fstat(): %s",WTMP_FILE,strerror(errno));
     res = -1;
Only in proftpd-1.3.1rc2.wtmpx/src: log.c~