Update.

1997-06-03 23:42  Ulrich Drepper  <drepper@cygnus.com>

	* elf/dl-support.c: Define and initialize _dl_verbose used in
	dl-machine.h.

	* io/ftw.c: Expand stat/lstat calls.

	* manual/intro.texi: Also refer to ISO 9945.
	Update info about SVID.
	Add description for XPG.

	* md5-crypt/md5-crypt.c: Namespace cleanups.
	* md5-crypt/md5.c: Likewise.
	* md5-crypt/md5.h: Likewise.
	* sysdeps/generic/crypt-entry.c: Likewise.

	* posix/unistd.h (_POSIX2_C_VERSION): Set to 199209L.

	* stdlib/fmtmsg.h: Declare addseverity only if __USE_SVID is
	defined.

	* sunrpc/rpc_scan.c (findkind): Declare `token' as const.
	* sunrpc/rpc_util.c (toktostr): Declare `token' as const.

	* time/Makefile: Make tzselect dependen of config.make.

1997-06-01 15:01  Miles Bader  <miles@gnu.ai.mit.edu>

	* manual/string.texi (String and Array Utilities): Add `Argz and
	Envz Vectors' to the menu.
	(Argz and Envz Vectors, Argz Functions, Envz Functions): New nodes.

1997-05-31 20:59  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* login/Makefile (utmpd-routines): Add utmpd.
	(extra-objs): Add utmpd objects to get dependencies.
	(distribute): Add sources for utmpd.
	(subdir-dirs): Define.

1997-06-02 16:28  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/wordsize-32/inttypes.h: Include features.h and use
	__CONCAT instead of defined __CONCAT__ ourself.
	* sysdeps/wordsize-64/inttypes.h: Likewise.

1997-06-01 19:11  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/wordsize-64/inttypes.h (INTMAX_C): Use `l' suffix, not
	`ll'.
	(PRIdFAST, PRIoFAST, PRIxFAST, PRIuFAST, SCNdFAST, SCNiFAST,
	SCNoFAST, SCNxFAST): Correct format specifiers.

1997-06-02 04:23  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/syscalls.list: Make fchdir weak alias for __fchdir.

1997-06-01 19:17  Ulrich Drepper  <drepper@cygnus.com>

	* md5-crypt/Makefile: Correct libmd5crypt file to really generate
	DES free libcrypt.
	* md5-crypt/onlymd5-entry.c: New file.  Wrapper around
	sysdeps/generic/crypt-entry.c.

1997-06-01 12:48  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/alpha/gnu/types.h (__fd_mask): Change
	type to `unsigned long int'.
	Patch by Richard Henderson <richard@twiddle.rth.home>.

1997-05-30 17:34  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sysdeps/generic/bb_init_func.c (__bb_init_func): Use ISO C
	declaration style.

	* nss/nss_files/files-hosts.c: Delete inclusion of
	"../resolv/mapv4v6hostent.h".

10 files changed, 2293 insertions, 0 deletions

diff --git a/login/programs/connection.c b/login/programs/connection.c
new file mode 100644
index 0000000000..4e1663189d
--- /dev/null
+++ b/login/programs/connection.c
@@ -0,0 +1,180 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include "utmpd-private.h"
+
+
+/* Prototypes for the local functions.  */
+static client_connection *alloc_connection (void);
+static void free_connection (client_connection *connection);
+static int set_nonblock_flag (int desc, int value);
+
+
+/* The head of the connection list.  */
+static client_connection *connection_list = NULL;
+
+
+/* Accept connection on SOCK, with access permissions given by ACCESS.
+   Returns a pointer to a newly allocated client_connection if
+   successful, NULL if not.  */
+client_connection *
+accept_connection (int sock, int access)
+{
+  client_connection *connection;
+
+  connection = alloc_connection ();
+  if (connection == NULL)
+    return NULL;
+
+  connection->sock = accept (sock, NULL, NULL);
+  connection->access = access;
+  if (connection->sock < 0)
+    {
+      free_connection (connection);
+      return NULL;
+    }
+  
+  if (set_nonblock_flag (connection->sock, 1) < 0)
+    {
+      close_connection (connection);
+      return NULL;
+    }
+
+  return connection;  
+}
+
+
+/* Close CONNECTION.  */
+void
+close_connection (client_connection *connection)
+{
+  close (connection->sock);
+  free_connection (connection);
+}
+
+
+/* Return the connection for SOCK.  */
+client_connection *
+find_connection (int sock)
+{
+  client_connection *connection;
+
+  for (connection = connection_list; connection;
+       connection = connection->next)
+    {
+      if (connection->sock == sock)
+	return connection;
+    }
+
+  return NULL;
+}
+
+
+static client_connection *
+alloc_connection (void)
+{
+  client_connection *connection;
+  size_t read_bufsize = 1024;
+  size_t write_bufsize = 1024;
+
+  connection = (client_connection *)malloc (sizeof (client_connection));
+  if (connection == NULL)
+    return NULL;
+
+  memset (connection, 0, sizeof (client_connection));
+
+  /* Allocate read buffer.  */
+  connection->read_base = malloc (read_bufsize);
+  connection->read_ptr = connection->read_base;
+  connection->read_end = connection->read_base + read_bufsize;
+  if (connection->read_base == NULL)
+    {
+      free (connection);
+      return NULL;
+    }
+
+  /* Allocate write buffer.  */
+  connection->write_base = malloc (write_bufsize);
+  connection->write_ptr = connection->write_base;
+  connection->write_end = connection->write_base + write_bufsize;
+  if (connection->write_base == NULL)
+    {
+      free (connection->read_base);
+      free (connection);
+      return NULL;
+    }
+
+  /* Link connection.  */
+  connection->next = connection_list;
+  connection_list = connection;
+  if (connection->next)
+    connection->next->prev = connection;
+  
+  return connection;
+}
+
+
+static void
+free_connection (client_connection *connection)
+{
+  /* Unlink connection.  */
+  if (connection->next)
+    connection->next->prev = connection->prev;
+  if (connection->prev)
+    connection->prev->next = connection->next;
+
+  /* Take care of the head of the list.  */
+  if (connection == connection_list)
+    connection_list = connection->next;
+  
+  /* Free buffers.  */
+  if (connection->read_base)
+    free (connection->read_base);
+  if (connection->write_base)
+    free (connection->write_base);
+
+  free (connection);
+}
+
+
+/* Set the `O_NONBLOCK' flag of DESC if VALUE is nonzero,
+   or clear the flag if VALUE is 0.
+   Return 0 on success, or -1 on error with `errno' set. */
+static int
+set_nonblock_flag (int desc, int value)
+{
+  int oldflags = fcntl (desc, F_GETFL, 0);
+  /* If reading the flags failed, return error indication now. */
+  if (oldflags == -1)
+    return -1;
+  /* Set just the flag we want to set. */
+  if (value != 0)
+    oldflags |= O_NONBLOCK;
+  else
+    oldflags &= ~O_NONBLOCK;
+  /* Store modified flag word in the descriptor. */
+  return fcntl (desc, F_SETFL, oldflags);
+}
diff --git a/login/programs/database.c b/login/programs/database.c
new file mode 100644
index 0000000000..e31e0d9dae
--- /dev/null
+++ b/login/programs/database.c
@@ -0,0 +1,516 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <time.h>
+#include <unistd.h>
+#include <utmp.h>
+
+
+#include "utmpd-private.h"
+#include "xtmp.h"
+
+
+/* Prototypes for the local functions.  */
+static int initialize_database (utmp_database *database);
+static int store_state_entry (utmp_database *database, int old_position,
+			      const struct utmp *old_entry);
+static int store_process_entry (utmp_database *database, int old_position,
+				const struct utmp *old_entry);
+static int replace_entry (utmp_database *database, int old_position,
+			  int new_position, const struct utmp *entry);
+static int store_entry (utmp_database *database, int position,
+			const struct utmp *entry);
+static int proc_utmp_eq (const struct utmp *entry, const struct utmp *match);
+static int get_mtime (const char *file, time_t *timer);
+
+
+/* Open the database specified by FILE and merge it with the
+   contents of the old format file specified by OLD_FILE.  Returns a
+   pointer to a newly allocated structure describing the database, or
+   NULL on error.  */
+utmp_database *
+open_database (const char *file, const char *old_file)
+{
+  utmp_database *database;
+
+  /* Allocate memory.  */
+  database = (utmp_database *) malloc (sizeof (utmp_database));
+  if (database == NULL)
+    return NULL;
+
+  memset (database, 0, sizeof (utmp_database));
+
+  /* Open database.  */
+  database->fd = open (file, O_RDWR);
+  if (database->fd < 0)
+    goto fail;
+
+  database->old_fd = open (old_file, O_RDWR);
+  if (database->old_fd < 0)
+    goto fail;
+  
+  if ((file && !(database->file = strdup (file)))
+      || (old_file && !(database->old_file = strdup (old_file))))
+    goto fail;
+
+  if (initialize_database (database) < 0
+      || synchronize_database (database) < 0)
+    goto fail;
+  
+  return database;
+
+fail:
+  close_database (database);
+  return NULL;
+}
+
+/* Synchronize DATABASE.  */
+int
+synchronize_database (utmp_database *database)
+{
+  assert (database);
+
+  /* Check if there is a file in the old format, that we have to
+     synchronize with.  */
+  if (database->old_file)
+    {
+      time_t curtime;
+      time_t mtime;
+      
+      curtime = time (NULL);
+      
+      if (get_mtime (database->old_file, &mtime) < 0)
+	return -1;
+      
+      if (mtime >= database->mtime)
+	{
+	  int position = 0;
+	  struct utmp entry;
+	  struct utmp old_entry;
+
+	  while (1)
+	    {
+	      if (read_old_entry (database, position, &old_entry) < 0)
+		break;
+	      
+	      if (read_entry (database, position, &entry) < 0
+		  || !compare_entry (&old_entry, &entry))
+		{
+		  if (write_entry (database, position, &old_entry) < 0)
+		    return -1;
+		}
+
+	      position++;
+	    }
+
+	  database->mtime = curtime;
+	}
+      
+    }
+
+  return 0;
+}
+
+
+/* Close DATABASE.  */
+void
+close_database (utmp_database *database)
+{
+  assert (database);
+
+  if (database->fd >= 0)
+    close (database->fd);
+
+  if (database->old_fd >= 0)
+    close (database->old_fd);
+  
+  /* Free allocated memory.  */
+  if (database->file)
+    free (database->file);
+  if (database->old_file)
+    free (database->old_file);
+  free (database);
+}
+
+
+/* Read the entry at POSITION in DATABASE and store the result in
+   ENTRY.  Returns 0 if successful, -1 if not.  */
+int
+read_entry (utmp_database *database, int position, struct utmp *entry)
+{
+  ssize_t nbytes;
+  off_t offset;
+
+  offset = position * sizeof (struct utmp);
+  if (lseek (database->fd, offset, SEEK_SET) < 0)
+    return -1;
+
+  nbytes = read (database->fd, entry, sizeof (struct utmp));
+  if (nbytes != sizeof (struct utmp))
+    return -1;
+  
+  return 0;
+}
+
+
+/* Write ENTRY at POSITION in DATABASE.  Returns 0 if successful, -1
+   on error.  */
+int
+write_entry (utmp_database *database, int position,
+	     const struct utmp *entry)
+{
+  int result = -1;
+  struct flock fl;
+  ssize_t nbytes;
+  off_t offset;
+
+  /* Try to lock the file.  */
+  memset (&fl, 0, sizeof (struct flock));
+  fl.l_type = F_WRLCK;
+  fl.l_whence = SEEK_SET;
+  fcntl (database->fd, F_SETLKW, &fl);
+  
+  offset = position * sizeof (struct utmp);
+  if (lseek (database->fd, offset, SEEK_SET) < 0)
+    goto fail;
+
+  nbytes = write (database->fd, entry, sizeof (struct utmp));
+  if (nbytes != sizeof (struct utmp))
+    {
+      ftruncate (database->fd, offset);
+      goto fail;
+    }
+
+  result = 0;
+
+fail:
+  /* And unlock the file.  */
+  fl.l_type = F_UNLCK;
+  fcntl (database->fd, F_SETLKW, &fl);
+
+  return result;
+}
+
+
+/* Append ENTRY to DATABASE.  Returns the position of the appended
+   entry if successful, or -1 on error.  */
+int
+append_entry (utmp_database *database, const struct utmp *entry)
+{
+  int result = -1;
+  struct flock fl;
+  ssize_t nbytes;
+  off_t offset;
+
+  /* Try to lock the file.  */
+  memset (&fl, 0, sizeof (struct flock));
+  fl.l_type = F_WRLCK;
+  fl.l_whence = SEEK_SET;
+  fcntl (database->fd, F_SETLKW, &fl);
+  
+  offset = lseek (database->fd, 0, SEEK_END);
+  if (offset % sizeof (struct utmp) != 0)
+    {
+      offset -= offset % sizeof (struct utmp);
+      ftruncate (database->fd, offset);
+
+      if (lseek (database->fd, 0, SEEK_END) < 0)
+	goto fail;
+    }
+
+  nbytes = write (database->fd, entry, sizeof (struct utmp));
+  if (nbytes != sizeof (struct utmp))
+    {
+      ftruncate (database->fd, offset);
+      goto fail;
+    }
+
+  result = offset / sizeof (struct utmp);
+  
+fail:
+  /* And unlock the file.  */
+  fl.l_type = F_UNLCK;
+  fcntl (database->fd, F_SETLKW, &fl);
+
+  return result;
+}
+
+
+int
+read_old_entry (utmp_database *database, int position,
+		struct utmp *entry)
+{
+  struct xtmp old_entry;
+  ssize_t nbytes;
+  off_t offset;
+
+  offset = position * sizeof (struct xtmp);
+  if (lseek (database->old_fd, offset, SEEK_SET) < 0)
+    return -1;
+
+  nbytes = read (database->old_fd, &old_entry, sizeof (struct xtmp));
+  if (nbytes != sizeof (struct xtmp))
+    return -1;
+  
+  xtmp_to_utmp (&old_entry, entry);
+  return 0;
+}
+
+
+int
+write_old_entry (utmp_database *database, int position,
+		 const struct utmp *entry)
+{
+  struct xtmp old_entry;
+  ssize_t nbytes;
+  off_t offset;
+
+  utmp_to_xtmp (entry, &old_entry);
+  
+  offset = position * sizeof (struct xtmp);
+  if (lseek (database->old_fd, offset, SEEK_SET) < 0)
+    return -1;
+
+  nbytes = write (database->old_fd, &old_entry, sizeof (struct xtmp));
+  if (nbytes != sizeof (struct xtmp))
+    return -1;
+
+  return 0;
+}
+
+
+/* Initialize DATABASE.  */
+static int
+initialize_database (utmp_database *database)
+{
+  struct utmp entry;
+  int position = 0;
+  
+  assert (database);
+
+  /* Check if there is a file in the old format to read.  */
+  if (database->old_file)
+    {
+      while (1)
+	{
+	  if (read_old_entry (database, position, &entry) < 0)
+	    break;
+
+#if _HAVE_UT_TYPE - 0
+	  /* If the login type is one of RUN_LVL, BOOT_TIME, OLD_TIME or
+	     NEW_TIME, search for an entry of the same type in the
+	     database, and replace it if the entry in the file is newer.  */
+	  if (entry.ut_type == RUN_LVL || entry.ut_type == BOOT_TIME
+	      || entry.ut_type == OLD_TIME || entry.ut_type == NEW_TIME)
+	    {
+	      if (store_state_entry (database, position, &entry) < 0)
+		return -1;
+	    }
+	  else
+#endif
+	    {
+	      if (store_process_entry (database, position, &entry) < 0)
+		return -1;
+	    }
+
+	  /* Update position.  */
+	  position++;
+	}
+
+      while (1)
+	{
+	  if (read_entry (database, position, &entry) < 0)
+	    break;
+
+	  if (write_old_entry (database, position, &entry) < 0)
+	    return -1;
+
+	  /* Update position.  */
+	  position++;
+	}
+    }
+
+  return 0;
+}
+
+
+static int
+store_state_entry (utmp_database *database, int old_position,
+		   const struct utmp *old_entry)
+{
+  struct utmp new_entry;
+  int new_position = 0;
+  int found = 0;
+
+  assert (old_entry->ut_type == RUN_LVL
+	  || old_entry->ut_type == BOOT_TIME
+	  || old_entry->ut_type == OLD_TIME
+	  || old_entry->ut_type == NEW_TIME);
+
+  while (!found)
+    {
+      /* Read the next entry.  */
+      if (read_entry (database, new_position, &new_entry) < 0)
+	break;
+      
+      if (old_entry->ut_type == new_entry.ut_type)
+	{
+	  found = 1;
+	  continue;
+	}
+
+      /* Update position.  */
+      new_position++;
+    }
+
+  if (found)
+    {
+      const struct utmp *entry;
+
+      if (old_entry->ut_time > new_entry.ut_time)
+	entry = old_entry;
+      else
+	entry = &new_entry;
+      
+      return replace_entry (database, old_position, new_position, entry);
+    }
+
+  return store_entry (database, old_position, old_entry);
+}
+
+
+static int
+store_process_entry (utmp_database *database, int old_position,
+		     const struct utmp *old_entry)
+{
+  struct utmp new_entry;
+  int new_position = 0;
+  int found = 0;
+
+  while (!found)
+    {
+      /* Read the next entry.  */
+      if (read_entry (database, new_position, &new_entry) < 0)
+	break;
+
+      if (proc_utmp_eq (old_entry, &new_entry))
+	{
+	  found = 1;
+	  continue;
+	}
+
+      /* Update position.  */
+      new_position++;
+    }
+
+  if (found)
+    {
+      const struct utmp *entry;
+
+      if (old_entry->ut_time > new_entry.ut_time)
+	entry = old_entry;
+      else
+	entry = &new_entry;
+      
+      return replace_entry (database, old_position, new_position, entry);
+    }
+
+  return store_entry (database, old_position, old_entry);
+}
+
+
+static int
+replace_entry (utmp_database *database, int old_position, int new_position,
+	       const struct utmp *entry)
+{
+  struct utmp tmp;
+  
+  if (read_entry (database, old_position, &tmp) < 0
+      || write_entry (database, old_position, entry) < 0
+      || write_entry (database, new_position, &tmp) < 0)
+    return -1;
+
+  return 0;
+}
+
+
+static int
+store_entry (utmp_database *database, int position,
+	     const struct utmp *entry)
+{
+  struct utmp tmp;
+
+  if (read_entry (database, position, &tmp) < 0)
+    return write_entry (database, position, entry);
+
+  if (write_entry (database, position, entry) < 0
+      || append_entry (database, &tmp) < 0)
+    return -1;
+
+  return 0;
+}
+
+
+/* This function is identical to the one in login/utmp_file.c.  */
+static int
+proc_utmp_eq (const struct utmp *entry, const struct utmp *match)
+{
+  return
+    (
+#if _HAVE_UT_TYPE - 0
+     (entry->ut_type == INIT_PROCESS
+      || entry->ut_type == LOGIN_PROCESS
+      || entry->ut_type == USER_PROCESS
+      || entry->ut_type == DEAD_PROCESS)
+     &&
+     (match->ut_type == INIT_PROCESS
+      || match->ut_type == LOGIN_PROCESS
+      || match->ut_type == USER_PROCESS
+      || match->ut_type == DEAD_PROCESS)
+     &&
+#endif
+#if _HAVE_UT_ID - 0
+     strncmp (entry->ut_id, match->ut_id, sizeof match->ut_id) == 0
+#else
+     strncmp (entry->ut_line, match->ut_line, sizeof match->ut_line) == 0
+#endif
+     );
+}
+
+
+/* Get modification time of FILE and put it in TIMER.  returns 0 if
+   successful, -1 if not.  */
+static int
+get_mtime (const char *file, time_t *timer)
+{
+  struct stat st;
+  
+  if (stat (file, &st) < 0)
+    return -1;
+
+  *timer = st.st_mtime;
+
+  return 0;
+}
diff --git a/login/programs/error.c b/login/programs/error.c
new file mode 100644
index 0000000000..e6511442e3
--- /dev/null
+++ b/login/programs/error.c
@@ -0,0 +1,104 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+
+#include "utmpd-private.h"
+
+
+/* This variable indicates if we have forked.  If set, we log messages
+   via the system logger.  Otherwise we simply print the program name
+   and the message to standard error.  */
+int forked = 0;
+
+
+/* Log error message MESSAGE, which is a printf-style format string
+   with optional args.
+   If ERRNUM is nonzero, also log its corresponding system error message.
+   Exit with status STATUS if it is nonzero.  */
+void
+error (int status, int errnum, const char *message, ...)
+{
+  va_list ap;
+  char *buffer = NULL;
+
+  va_start (ap, message);
+  vasprintf (&buffer, message, ap);
+  va_end (ap);
+
+  if (forked)
+    {
+      if (errnum == 0)
+	syslog (LOG_ERR, "%s", buffer);
+      else
+	syslog (LOG_ERR, "%s: %s", buffer, strerror (errnum));
+    }
+  else
+    {
+      if (errnum == 0)
+	fprintf (stderr, "%s: %s\n", program_invocation_name, buffer);
+      else
+	fprintf (stderr, "%s: %s: %s\n", program_invocation_name, buffer,
+		 strerror (errnum));
+    }
+
+  if (buffer)
+    free (buffer);
+
+  if (status)
+    exit (status);
+}
+
+/* Log warning message MESSAGE, which is a printf-style format string
+   with optional args.
+   If ERRNUM is nonzero, also log its corresponding system error message. */
+void
+warning (int errnum, const char *message, ...)
+{
+  va_list ap;
+  char *buffer = NULL;
+
+  va_start (ap, message);
+  vasprintf (&buffer, message, ap);
+  va_end (ap);
+
+  if (forked)
+    {
+      if (errnum == 0)
+	syslog (LOG_WARNING, "%s", buffer);
+      else
+	syslog (LOG_WARNING, "%s: %s", buffer, strerror (errnum));
+    }
+  else
+    {
+      if (errnum == 0)
+	printf ("%s: %s\n", program_invocation_name, buffer);
+      else
+	printf ("%s: %s: %s\n", program_invocation_name, buffer,
+		strerror (errnum));
+    }
+
+  if (buffer)
+    free (buffer);
+}
diff --git a/login/programs/request.c b/login/programs/request.c
new file mode 100644
index 0000000000..0f68b8ae79
--- /dev/null
+++ b/login/programs/request.c
@@ -0,0 +1,650 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <assert.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <utmp.h>
+
+#include "utmpd.h"
+#include "utmpd-private.h"
+
+
+/* Prototypes for the local functions.  */
+static int process_request (client_connection *connection);
+static int send_reply (client_connection *connect, const reply_header *reply);
+
+static int do_setutent (client_connection *connection);
+static int do_getutent (client_connection *connection);
+static int do_endutent (client_connection *connection);
+static int do_getutline (client_connection *connection);
+static int do_getutid (client_connection *connection);
+static int do_pututline (client_connection *connection);
+static int do_updwtmp (client_connection *connection);
+
+static int proc_utmp_eq (const struct utmp *entry, const struct utmp *match);
+static int internal_getut_r (client_connection *connection,
+			     const struct utmp *id, struct utmp *buffer);
+
+
+/* Read data from the client on CONNECTION.  */
+int
+read_data (client_connection *connection)
+{
+  ssize_t nbytes;
+
+  assert (connection);
+  assert ((connection->read_end - connection->read_ptr) > 0);
+
+  /* Read data.  */
+  nbytes = read (connection->sock, connection->read_ptr,
+		 connection->read_end - connection->read_ptr);
+  if (nbytes > 0)
+    {
+      size_t total_bytes;
+
+      /* Update read pointer.  */
+      connection->read_ptr += nbytes;
+
+      /* Check if we have a complete request header.  */
+      total_bytes = connection->read_ptr - connection->read_base;
+      if (total_bytes >= sizeof (request_header))
+	{
+	  request_header *header;
+
+	  /* Check if we have a complete request.  */
+	  header = (request_header *)connection->read_base;
+	  if (total_bytes >= header->size)
+	    {
+	      /* Process the request.  */
+	      if (process_request (connection) < 0)
+		return -1;
+
+	      /* Adjust read pointer, and flush buffer.  */
+	      connection->read_ptr -= header->size;
+	      memmove (connection->read_base,
+		       connection->read_base + header->size,
+		       connection->read_ptr - connection->read_base);
+	    }
+	}
+
+      return 0;
+    }
+
+  if (nbytes < 0)
+    error (0, errno, "cannot read from client");
+
+  return -1;
+}
+
+
+/* Write data to the client on CONNECTION.  */
+int
+write_data (client_connection *connection)
+{
+  ssize_t nbytes;
+
+  assert (connection);
+  assert ((connection->write_ptr - connection->write_base) > 0);
+
+  /* Write data.  */
+  nbytes = write (connection->sock, connection->write_base,
+		  connection->write_ptr - connection->write_base);
+  if (nbytes > 0)
+    {
+      /* Adjust write pointer and flush buffer.  */
+      connection->write_ptr -= nbytes;
+      memmove (connection->write_base, connection->write_base + nbytes,
+	       connection->write_ptr - connection->write_base);
+
+      return 0;
+    }
+
+  if (nbytes < 0)
+    error (0, errno, "cannot write to client");
+
+  return -1;
+}
+
+
+/* Process the request received on CONNECTION.  Returns 0 if
+   successful, -1 if not.  */
+static int
+process_request (client_connection *connection)
+{
+  request_header *header;
+
+  assert (connection);
+  assert (connection->read_base);
+
+  header = (request_header *)connection->read_base;
+  if (header->version != UTMPD_VERSION)
+    {
+      warning (EINVAL, "invalid protocol version");
+      return -1;
+    }
+
+  switch (header->type)
+    {
+    case UTMPD_REQ_SETUTENT:	return do_setutent (connection);
+    case UTMPD_REQ_GETUTENT:	return do_getutent (connection);
+    case UTMPD_REQ_ENDUTENT:	return do_endutent (connection);
+    case UTMPD_REQ_GETUTLINE:	return do_getutline (connection);
+    case UTMPD_REQ_GETUTID:	return do_getutid (connection);
+    case UTMPD_REQ_PUTUTLINE:	return do_pututline (connection);
+    case UTMPD_REQ_UPDWTMP:	return do_updwtmp (connection);
+    default:
+      warning (EINVAL, "invalid request type");
+      return -1;
+    }
+}
+
+
+/* Send the reply specified by HEADER to the client on CONNECTION.
+   Returns 0 if successful, -1 if not.  */
+static int
+send_reply (client_connection *connection, const reply_header *reply)
+{
+  /* Check if the reply fits in the buffer.  */
+  if ((size_t) (connection->write_end - connection->write_ptr) < reply->size)
+    {
+      error (0, 0, "buffer overflow");
+      return -1;
+    }
+
+  /* Copy reply to buffer, and adjust write pointer.  */
+  memcpy (connection->write_ptr, reply, reply->size);
+  connection->write_ptr += reply->size;
+
+  return 0;
+}
+
+
+static int
+do_setutent (client_connection *connection)
+{
+  setutent_request *request;
+  setutent_reply reply;
+
+  request = (setutent_request *)connection->read_base;
+  if (request->header.size != sizeof (setutent_request))
+    {
+      warning (EINVAL, "invalid request size");
+      return -1;
+    }
+
+  /* Initialize reply.  */
+  reply.header.version = UTMPD_VERSION;
+  reply.header.size = sizeof (setutent_reply);
+  reply.header.type = UTMPD_REQ_SETUTENT;
+
+  /* Select database.  */
+  if (!strncmp (request->file, _PATH_UTMP, sizeof request->file))
+    connection->database = utmp_db;
+  else
+    {
+      errno = EINVAL;
+      goto return_error;
+    }
+
+  /* Initialize position pointer.  */
+  connection->position = 0;
+
+#if _HAVE_UT_TYPE - 0
+  /* Make sure the entry won't match.  */
+  connection->last_entry.ut_type = -1;
+#endif
+
+  reply.errnum = 0;
+  reply.result = 0;
+  return send_reply (connection, &reply.header);
+
+return_error:
+  reply.errnum = errno;
+  reply.result = -1;
+  return send_reply (connection, &reply.header);
+}
+
+
+static int
+do_getutent (client_connection *connection)
+{
+  getutent_request *request;
+  getutent_reply reply;
+
+  request = (getutent_request *)connection->read_base;
+  if (request->header.size != sizeof (getutent_request))
+    {
+      warning (EINVAL, "invalid request size");
+      return -1;
+    }
+
+  /* Initialize reply.  */
+  reply.header.version = UTMPD_VERSION;
+  reply.header.size = sizeof (getutent_reply);
+  reply.header.type = UTMPD_REQ_GETUTENT;
+
+  if (connection->database == NULL || connection->position == -1)
+    {
+      errno = ESRCH;
+      goto return_error;
+    }
+
+  /* Make sure we're in synch with the ordinary file.  */
+  if (synchronize_database (connection->database) < 0)
+    {
+      errno = ESRCH;
+      goto return_error;
+    }
+
+  /* Read the next entry from the database.  */
+  if (read_entry (connection->database, connection->position,
+		  &connection->last_entry) < 0)
+    {
+      connection->position = -1;
+      errno = ESRCH;
+      goto return_error;
+    }
+
+  /* Update position pointer.  */
+  connection->position++;
+
+  memcpy (&reply.entry, &connection->last_entry, sizeof (struct utmp));
+  reply.errnum = 0;
+  reply.result = 0;
+  return send_reply (connection, (reply_header *)&reply);
+
+return_error:
+  memset (&reply.entry, 0, sizeof (struct utmp));
+  reply.errnum = errno;
+  reply.result = -1;
+  return send_reply (connection, &reply.header);
+}
+
+
+static int
+do_endutent (client_connection *connection)
+{
+  endutent_request *request;
+  endutent_reply reply;
+
+  request = (endutent_request *)connection->read_base;
+  if (request->header.size != sizeof (endutent_request))
+    {
+      warning (EINVAL, "invalid request size");
+      return -1;
+    }
+
+  /* Deselect database.  */
+  connection->database = NULL;
+
+  /* Formulate reply.  */
+  reply.header.version = UTMPD_VERSION;
+  reply.header.size = sizeof (endutent_reply);
+  reply.header.type = UTMPD_REQ_ENDUTENT;
+  reply.errnum = 0;
+  reply.result = 0;
+
+  return send_reply (connection, &reply.header);
+}
+
+
+static int
+do_getutline (client_connection *connection)
+{
+  getutline_request *request;
+  getutline_reply reply;
+
+  request = (getutline_request *)connection->read_base;
+  if (request->header.size != sizeof (getutline_request))
+    {
+      warning (EINVAL, "invalid request size");
+      return -1;
+    }
+
+  /* Initialize reply.  */
+  reply.header.version = UTMPD_VERSION;
+  reply.header.size = sizeof (getutline_reply);
+  reply.header.type = UTMPD_REQ_GETUTLINE;
+
+  if (connection->database == NULL || connection->position == -1)
+    {
+      errno = ESRCH;
+      goto return_error;
+    }
+
+  /* Make sure we're in synch with the ordinary file.  */
+  if (synchronize_database (connection->database) < 0)
+    {
+      errno = ESRCH;
+      goto return_error;
+    }
+
+  while (1)
+    {
+      /* Read the next entry.  */
+      if (read_entry (connection->database, connection->position,
+		      &connection->last_entry) < 0)
+	{
+	  connection->position = -1;
+	  errno = ESRCH;
+	  goto return_error;
+	}
+      connection->position++;
+
+      /* Stop if we found a user or login entry.  */
+      if (
+#if _HAVE_UT_TYPE - 0
+	  (connection->last_entry.ut_type == USER_PROCESS
+	   || connection->last_entry.ut_type == LOGIN_PROCESS)
+	  &&
+#endif
+	  !strncmp (request->line.ut_line, connection->last_entry.ut_line,
+		    sizeof request->line.ut_line))
+	break;
+    }
+
+  memcpy (&reply.entry, &connection->last_entry, sizeof (struct utmp));
+  reply.errnum = 0;
+  reply.result = 0;
+  return send_reply (connection, &reply.header);
+
+return_error:
+  memset (&reply.entry, 0, sizeof (struct utmp));
+  reply.errnum = errno;
+  reply.result = -1;
+  return send_reply (connection, &reply.header);
+}
+
+
+static int
+do_getutid (client_connection *connection)
+{
+  getutid_request *request;
+  getutid_reply reply;
+
+  request = (getutid_request *)connection->read_base;
+  if (request->header.size != sizeof (getutid_request))
+    {
+      warning (EINVAL, "invalid request size");
+      return -1;
+    }
+
+  /* Initialize reply.  */
+  reply.header.version = UTMPD_VERSION;
+  reply.header.size = sizeof (getutid_reply);
+  reply.header.type = UTMPD_REQ_GETUTID;
+
+  if (connection->database == NULL || connection->position == -1)
+    {
+      errno = ESRCH;
+      goto return_error;
+    }
+
+  /* Make sure we're in synch with the ordinary file.  */
+  if (synchronize_database (connection->database) < 0)
+    {
+      errno = ESRCH;
+      goto return_error;
+    }
+
+  if (internal_getut_r (connection, &request->id,
+			&connection->last_entry) < 0)
+    {
+      errno = ESRCH;
+      goto return_error;
+    }
+
+  reply.errnum = 0;
+  reply.result = 0;
+  memcpy (&reply.entry, &connection->last_entry, sizeof (struct utmp));
+  return send_reply (connection, &reply.header);
+
+return_error:
+  memset (&reply.entry, 0, sizeof (struct utmp));
+  reply.errnum = errno;
+  reply.result = -1;
+  return send_reply (connection, &reply.header);
+}
+
+
+static int
+do_pututline (client_connection *connection)
+{
+  pututline_request *request;
+  pututline_reply reply;
+  struct utmp buffer;
+  int found;
+
+  request = (pututline_request *)connection->read_base;
+  if (request->header.size != sizeof (pututline_request))
+    {
+      warning (EINVAL, "invalid request size");
+      return -1;
+    }
+
+  /* Initialize reply.  */
+  reply.header.version = UTMPD_VERSION;
+  reply.header.size = sizeof (pututline_reply);
+  reply.header.type = UTMPD_REQ_PUTUTLINE;
+
+  if (!(connection->access & W_OK))
+    {
+      errno = EPERM;
+      goto return_error;
+    }
+
+  if (connection->database == NULL || connection->position == -1)
+    {
+      errno = ESRCH;
+      goto return_error;
+    }
+
+  /* Make sure we're in synch with the ordinary file.  */
+  if (synchronize_database (connection->database) < 0)
+    {
+      errno = ESRCH;
+      goto return_error;
+    }
+
+  /* Find the correct place to insert the data.  */
+  if (connection->position > 0
+    && (
+#if _HAVE_UT_TYPE - 0
+	(connection->last_entry.ut_type == request->utmp.ut_type
+	 && (connection->last_entry.ut_type == RUN_LVL
+	     || connection->last_entry.ut_type == BOOT_TIME
+	     || connection->last_entry.ut_type == OLD_TIME
+	     || connection->last_entry.ut_type == NEW_TIME))
+	||
+#endif
+	proc_utmp_eq (&connection->last_entry, &request->utmp)))
+    found = 1;
+  else
+    found = internal_getut_r (connection, &request->utmp, &buffer);
+
+  if (found < 0)
+    {
+      /* We append the next entry.  */
+      connection->position =
+	append_entry (connection->database, &request->utmp);
+      if (connection->position < 0)
+	goto return_error;
+    }
+  else
+    {
+      /* We replace the just read entry.  */
+      connection->position--;
+      if (write_entry (connection->database, connection->position,
+		       &request->utmp) < 0)
+	goto return_error;
+    }
+
+  /* Write the entry to the compatibility file.  */
+  write_old_entry (connection->database, connection->position, &request->utmp);
+
+  /* Update position pointer.  */
+  connection->position++;
+
+  reply.errnum = 0;
+  reply.result = 0;
+  return send_reply (connection, &reply.header);
+
+return_error:
+  reply.errnum = errno;
+  reply.result = -1;
+  return send_reply (connection, &reply.header);
+}
+
+
+static int
+do_updwtmp (client_connection *connection)
+{
+  updwtmp_request *request;
+  updwtmp_reply reply;
+  utmp_database *database;
+
+  request = (updwtmp_request *)connection->read_base;
+  if (request->header.size != sizeof (updwtmp_request))
+    {
+      warning (EINVAL, "invalid request size");
+      return -1;
+    }
+
+  /* Initialize reply.  */
+  reply.header.version = UTMPD_VERSION;
+  reply.header.size = sizeof (updwtmp_reply);
+  reply.header.type = UTMPD_REQ_UPDWTMP;
+
+  if (!(connection->access & W_OK))
+    {
+      errno = EPERM;
+      goto return_error;
+    }
+
+  /* Select database.  */
+  if (!strncmp (request->file, _PATH_UTMP, sizeof request->file))
+    database = utmp_db;
+  else
+    {
+      errno = EINVAL;
+      goto return_error;
+    }
+
+  /* Make sure we're in synch with the ordinary file.  */
+  if (synchronize_database (database) < 0)
+    {
+      errno = ESRCH;
+      goto return_error;
+    }
+
+  /* Append the entry.  */
+  if (append_entry (database, &request->utmp) < 0)
+    goto return_error;
+
+  reply.errnum = 0;
+  reply.result = 0;
+  return send_reply (connection, &reply.header);
+
+return_error:
+  reply.errnum = errno;
+  reply.result = -1;
+  return send_reply (connection, &reply.header);
+}
+
+
+/* This function is identical to the one in login/utmp_file.c.  */
+static int
+proc_utmp_eq (const struct utmp *entry, const struct utmp *match)
+{
+  return
+    (
+#if _HAVE_UT_TYPE - 0
+     (entry->ut_type == INIT_PROCESS
+      || entry->ut_type == LOGIN_PROCESS
+      || entry->ut_type == USER_PROCESS
+      || entry->ut_type == DEAD_PROCESS)
+     &&
+     (match->ut_type == INIT_PROCESS
+      || match->ut_type == LOGIN_PROCESS
+      || match->ut_type == USER_PROCESS
+      || match->ut_type == DEAD_PROCESS)
+     &&
+#endif
+#if _HAVE_UT_ID - 0
+     strncmp (entry->ut_id, match->ut_id, sizeof match->ut_id) == 0
+#else
+     strncmp (entry->ut_line, match->ut_line, sizeof match->ut_line) == 0
+#endif
+     );
+}
+
+
+/* This function is derived from the one in login/utmp_file.c.  */
+static int
+internal_getut_r (client_connection *connection,
+		  const struct utmp *id, struct utmp *buffer)
+{
+#if _HAVE_UT_TYPE - 0
+  if (id->ut_type == RUN_LVL || id->ut_type == BOOT_TIME
+      || id->ut_type == OLD_TIME || id->ut_type == NEW_TIME)
+    {
+      /* Search for next entry with type RUN_LVL, BOOT_TIME,
+	 OLD_TIME, or NEW_TIME.  */
+
+      while (1)
+	{
+	  /* Read the next entry.  */
+	  if (read_entry (connection->database, connection->position,
+			  buffer) < 0)
+	    {
+	      connection->position = -1;
+	      return -1;
+	    }
+	  connection->position++;
+
+	  if (id->ut_type == buffer->ut_type)
+	    break;
+	}
+    }
+  else
+#endif /* _HAVE_UT_TYPE */
+    {
+      /* Search for the next entry with the specified ID and with type
+	 INIT_PROCESS, LOGIN_PROCESS, USER_PROCESS, or DEAD_PROCESS.  */
+
+      while (1)
+	{
+	  /* Read the next entry.  */
+	  if (read_entry (connection->database, connection->position,
+			  buffer) < 0)
+	    {
+	      connection->position = -1;
+	      return -1;
+	    }
+	  connection->position++;
+
+	  if (proc_utmp_eq (buffer, id))
+	    break;
+	}
+    }
+
+  return 0;
+}
diff --git a/login/programs/utmpd-private.h b/login/programs/utmpd-private.h
new file mode 100644
index 0000000000..4a9cdb921e
--- /dev/null
+++ b/login/programs/utmpd-private.h
@@ -0,0 +1,107 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef _UTMPD_PRIVATE_H
+#define _UTMPD_PRIVATE_H	1
+
+#include <time.h>
+#include <utmp.h>
+
+
+/* The number of connections we allow.  */
+#ifndef MAX_CONNECTIONS
+#define MAX_CONNECTIONS	16
+#endif
+
+
+typedef struct utmp_database
+{
+  int fd;
+  int old_fd;
+  char *file;
+  char *old_file;
+  time_t mtime;
+} utmp_database;
+
+
+/* The databases we handle.  */
+extern utmp_database *utmp_db;
+extern utmp_database *wtmp_db;
+
+
+typedef struct client_connection
+{
+  int sock;
+  /* Access permissions.  */
+  int access;
+
+  /* Read pointer.  */
+  void *read_base;
+  void *read_ptr;
+  void *read_end;
+
+  /* Write buffer.  */
+  void *write_base;
+  void *write_ptr;
+  void *write_end;
+
+  /* Database to use for this connection.  */
+  utmp_database *database;
+  /* Position pointer.  */
+  int position;
+  
+  /* Last read entry.  */
+  struct utmp last_entry;
+
+  /* Pointers to the next and previous connections in the list.  */
+  struct client_connection *next;
+  struct client_connection *prev;
+} client_connection;
+
+
+/* This variable indicates if we have forked.  If set, we log messages
+   via the system logger.  Otherwise we simply print the program name
+   and the message to standard error.  */
+extern int forked;
+
+
+/* Database functions.  */
+utmp_database *open_database (const char *file, const char *old_file);
+int synchronize_database (utmp_database *database);
+void close_database (utmp_database *database);
+int read_entry (utmp_database *database, int position, struct utmp *entry);
+int write_entry (utmp_database *database, int position,
+		 const struct utmp *entry);
+int append_entry (utmp_database *database, const struct utmp *entry);
+int read_old_entry (utmp_database *database, int position, struct utmp *entry);
+int write_old_entry (utmp_database *database, int position,
+		     const struct utmp *entry);
+
+/* Connection oriented functions.  */
+client_connection *accept_connection (int sock, int access);
+client_connection *find_connection (int sock);
+void close_connection (client_connection *connection);
+int read_data (client_connection *connection);
+int write_data (client_connection *connection);
+
+void error (int status, int errnum, const char *message, ...);
+void warning (int errnum, const char *message, ...);
+
+#endif /* utmpd-private.h  */
+
diff --git a/login/programs/utmpd.c b/login/programs/utmpd.c
new file mode 100644
index 0000000000..e11218151c
--- /dev/null
+++ b/login/programs/utmpd.c
@@ -0,0 +1,384 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <libintl.h>
+#include <pwd.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <string.h>
+#include <sys/select.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/un.h>
+#include <syslog.h>
+#include <unistd.h>
+
+#include "utmpd.h"
+#include "utmpd-private.h"
+
+/* Get libc version number.  */
+#include "../../version.h"
+
+#define PACKAGE "libc"
+
+/* Long options.  */
+static const struct option long_options[] =
+{
+  { "debug", no_argument, NULL, 'd' },
+  { "help", no_argument, NULL, 'h' },
+  { "version", no_argument, NULL, 'V' },
+  { NULL, 0, NULL, 0}
+};
+
+/* The UTMP database.  */
+utmp_database *utmp_db;
+
+/* The socket for read only requests.  */
+int ro_sock = -1;
+
+/* The socket for read/write requests.  */
+int rw_sock = -1;
+
+
+/* Prototypes for the local functions.  */
+static void usage (int status) __attribute__ ((noreturn));
+static void drop_priviliges (void);
+static int make_socket (const char *name);
+static void handle_requests (void) __attribute__ ((noreturn));
+static void termination_handler (int signum);
+static int check_pid (const char *file);
+static int write_pid (const char *file);
+
+
+int
+main (int argc, char *argv[])
+{
+  mode_t mask;
+  int debug;
+  int do_help;
+  int do_version;
+  int opt;
+
+  /* Initialize local variables.  */
+  debug = 0;
+  do_help = 0;
+  do_version = 0;
+  
+  while ((opt = getopt_long (argc, argv, "dhV", long_options, NULL)) != -1)
+    switch (opt)
+      {
+      case '\0':		/* Long option.  */
+	break;
+      case 'h':
+	do_help = 1;
+	break;
+      case 'd':
+	debug = 1;
+	break;
+      case 'V':
+	do_version = 1;
+	break;
+      default:
+	usage (EXIT_FAILURE);
+      }
+
+  /* Version information is reequested.  */
+  if (do_version)
+    {
+      printf ("utmpd (GNU %s) %s\n", PACKAGE, VERSION);
+      printf (gettext ("\
+Copyright (C) %s Free Software Foundation, Inc.\n\
+This is free software; see the source for copying conditions.  There is NO\n\
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
+"), "1997");
+      printf (gettext ("Written by %s.\n"), "Mark Kettenis");
+
+      exit (EXIT_SUCCESS);
+    }
+
+  /* Help is requested.  */
+  if (do_help)
+    usage (EXIT_SUCCESS);
+
+  signal (SIGINT, termination_handler);
+  signal (SIGTERM, termination_handler);
+
+  /* Check if we are already running.  */
+  if (check_pid (_PATH_UTMPDPID))
+    error (EXIT_FAILURE, 0, "already running");
+
+  /* Open UTMP database.  */
+  utmp_db = open_database (_PATH_UTMP "x", _PATH_UTMP);
+  if (utmp_db == NULL)
+    error (EXIT_FAILURE, errno, "%s", _PATH_UTMP);
+
+  /* Create sockets, with the right permissions.  */
+  mask = umask (S_IXUSR | S_IXGRP | S_IXOTH);
+  ro_sock = make_socket (_PATH_UTMPD_RO);
+  umask (S_IXUSR | S_IRWXG | S_IRWXO);
+  rw_sock = make_socket (_PATH_UTMPD_RW);
+  umask (mask);
+
+  /* Set the sockets up to accept connections.  */
+  if (listen (ro_sock, MAX_CONNECTIONS) < 0
+      || listen (rw_sock, MAX_CONNECTIONS) < 0)
+    error (EXIT_FAILURE, errno, "cannot enable socket to accept connections");
+
+  /* Behave like a daemon.  */
+  if (!debug)
+    {
+      openlog ("utmpd", LOG_CONS | LOG_ODELAY, LOG_DAEMON);
+      
+      if (daemon (0, 0) < 0)
+	error (EXIT_FAILURE, errno, "cannot auto-background");
+      forked = 1;
+
+      if (write_pid (_PATH_UTMPDPID) < 0)
+	warning (errno, "%s", _PATH_UTMPDPID);
+    }
+
+  /* Drop priviliges.  */
+  drop_priviliges ();
+  
+  /* Handle incoming requests.  */
+  handle_requests ();
+}
+
+
+/* Display usage information and exit.  */
+static void
+usage (int status)
+{
+  if (status != EXIT_SUCCESS)
+    fprintf (stderr, gettext ("Try `%s --help' for more information.\n"),
+	     program_invocation_name);
+  else
+    {
+      printf (gettext ("\
+Usage: %s [OPTION]...\n\
+  -d, --debug           do not fork and display messages on the current tty\n\
+  -h, --help	        display this help and exit\n\
+  -V, --version         output version information and exit\n"),
+	      program_invocation_name);
+      fputs (gettext ("\
+Report bugs to <kettenis@phys.uva.nl>.\n"),
+	     stdout);
+    }
+  
+  exit (status);
+}
+
+
+/* Drop priviliges.  */
+static void
+drop_priviliges (void)
+{
+  struct passwd *pw;
+
+  pw = getpwnam ("daemon");
+  if (pw)
+    {
+      seteuid (pw->pw_uid);
+      setegid (pw->pw_gid);
+    }
+}
+
+
+/* Make a socket in the file namespace using the filename NAME as the
+   socket's address.  */
+static int
+make_socket (const char *name)
+{
+  struct sockaddr_un addr;
+  size_t size;
+  int sock;
+
+  /* Create the socket.  */
+  sock = socket (PF_UNIX, SOCK_STREAM, 0);
+  if (sock < 0)
+    error (EXIT_FAILURE, errno, "cannot create socket");
+
+  /* Bind a name to the socket.  */
+  addr.sun_family = AF_UNIX;
+  strcpy (addr.sun_path, name);
+
+  /* The size of the address is the offset of the start
+     of the filename, plus its length, plus one for the
+     terminating null byte. */
+  size = (offsetof (struct sockaddr_un, sun_path)
+	  + strlen (addr.sun_path));
+     
+  if (bind (sock, (struct sockaddr *) &addr, size) < 0)
+    error (EXIT_FAILURE, errno, "%s", name);
+     
+  return sock;
+}
+
+
+/* Hanlde incoming requests.  */
+static
+void handle_requests (void)
+{
+  client_connection *connection;
+  fd_set active_read_fd_set;
+  fd_set active_write_fd_set;
+  fd_set read_fd_set;
+  fd_set write_fd_set;
+  int fd;
+  
+  /* Initialize the set of active sockets.  */
+  FD_ZERO (&active_read_fd_set);
+  FD_ZERO (&active_write_fd_set);
+  FD_SET (rw_sock, &active_read_fd_set);
+  FD_SET (ro_sock, &active_read_fd_set);
+
+  while (1)
+    {
+      /* Block until input arrives on one or more active sockets.  */
+      read_fd_set = active_read_fd_set;
+      write_fd_set = active_write_fd_set;
+      if (select (FD_SETSIZE, &read_fd_set, &write_fd_set, NULL, NULL) < 0)
+	error (EXIT_FAILURE, errno, "cannot get input on sockets");
+
+      /* Service all the sockets with input pending.  */
+      for (fd = 0; fd < FD_SETSIZE; fd++)
+	{
+	  if (FD_ISSET (fd, &read_fd_set))
+	    {
+	      if (fd == ro_sock || fd == rw_sock)
+		{
+		  int access = ((fd == rw_sock) ? (R_OK | W_OK) : R_OK);
+
+		  connection = accept_connection (fd, access);
+		  if (connection == NULL)
+		    error (0, errno, "cannot accept connection");
+
+		  FD_SET (connection->sock, &active_read_fd_set);
+		}
+	      else
+		{
+		  connection = find_connection (fd);
+		  if (connection == NULL)
+		    error (EXIT_FAILURE, 0, "cannot find connection");
+
+		  if (read_data (connection) < 0)
+		    {
+		      close_connection (connection);
+		      FD_CLR (fd, &active_read_fd_set);
+		      FD_CLR (fd, &active_write_fd_set);
+		    }
+
+		  if (connection->write_ptr > connection->write_base)
+		      FD_SET (fd, &active_write_fd_set);
+		}
+	    }
+	  if (FD_ISSET (fd, &write_fd_set) &&
+	      fd != rw_sock && fd != ro_sock)
+	    {
+	      connection = find_connection (fd);
+	      if (connection == NULL)
+		error (EXIT_FAILURE, 0, "cannot find connection");
+
+	      if (write_data (connection) < 0)
+		{
+		  close_connection (connection);
+		  FD_CLR (fd, &active_read_fd_set);
+		  FD_CLR (fd, &active_write_fd_set);
+		}
+
+	      if (connection->write_ptr == connection->write_base)
+		FD_CLR (fd, &active_write_fd_set);
+	    }
+	}	
+    }
+}
+
+
+/* Cleanup.  */
+static void
+termination_handler (int signum)
+{
+  /* Close sockets.  */
+  close (ro_sock);
+  close (rw_sock);
+
+  /* Restore user id.  */
+  seteuid (getuid ());
+  
+  /* Clean up the files created by `bind'.  */
+  unlink (_PATH_UTMPD_RO);
+  unlink (_PATH_UTMPD_RW);
+
+  if (utmp_db)
+    close_database (utmp_db);
+
+  /* Clean up pid file.  */
+  unlink (_PATH_UTMPDPID);
+  
+  exit (EXIT_SUCCESS);
+}
+
+
+/* Returns 1 if the process in pid file FILE is running, 0 if not.  */
+static int
+check_pid (const char *file)
+{
+  FILE *fp;
+  
+  fp = fopen (_PATH_UTMPDPID, "r");
+  if (fp)
+    {
+      pid_t pid;
+      
+      fscanf (fp, "%d", &pid);
+      fclose (fp);
+
+      if (kill (pid, 0) == 0)
+	return 1;
+    }
+
+  return 0;
+}
+
+/* Write the current process id to the file FILE.  Returns 0 if
+   successful, -1 if not.  */
+static int
+write_pid (const char *file)
+{
+  FILE *fp;
+  
+  fp = fopen (_PATH_UTMPDPID, "w");
+  if (fp == NULL)
+    return -1;
+  
+  fprintf (fp, "%d\n", getpid ());
+  if (ferror (fp))
+    return -1;
+  
+  fclose (fp);
+
+  return 0;
+}
+
diff --git a/login/programs/utmpd.h b/login/programs/utmpd.h
new file mode 100644
index 0000000000..8fbc33c923
--- /dev/null
+++ b/login/programs/utmpd.h
@@ -0,0 +1,141 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef _UTMPD_H
+#define _UTMPD_H		1
+
+/* This is an *internal* header.  */
+
+#include <limits.h>
+#include <stddef.h>
+#include <utmp.h>
+
+
+/* Paths to daemon sockets.  */
+#define _PATH_UTMPD_RO	"/var/run/utmpd.ro"
+#define _PATH_UTMPD_RW	"/var/run/utmpd.rw"
+
+
+/* Path to PID file.  */
+#define _PATH_UTMPDPID	"/var/run/utmpd.pid"
+
+
+/* Version number of the daemon interface.  */
+#define UTMPD_VERSION	1
+
+
+/* Services provided.  */
+typedef enum
+{
+  UTMPD_REQ_SETUTENT,
+  UTMPD_REQ_GETUTENT,
+  UTMPD_REQ_ENDUTENT,
+  UTMPD_REQ_GETUTLINE,
+  UTMPD_REQ_GETUTID,
+  UTMPD_REQ_PUTUTLINE,
+  UTMPD_REQ_UPDWTMP
+} request_type;
+
+
+/* Header common to all requests.  */
+typedef struct
+{
+  /* Version number of the daemon interface.  */
+  int version;
+  /* Number of bytes in this request.  */
+  size_t size;
+  /* Service requested.  */
+  request_type type;
+} request_header;
+
+typedef struct
+{
+  request_header header;
+  /* File to use.  */
+  char file[_POSIX_PATH_MAX + 1];
+} setutent_request;
+
+typedef struct
+{
+  request_header header;
+} getutent_request, endutent_request;
+
+typedef struct
+{
+  request_header header;
+  /* Entry to match.  */
+  struct utmp line;
+} getutline_request;
+
+typedef struct
+{
+  request_header header;
+  /* Entry to match.  */
+  struct utmp id;
+} getutid_request;
+
+typedef struct
+{
+  request_header header;
+  /* Entry to write.  */
+  struct utmp utmp;
+} pututline_request;
+
+typedef struct
+{
+  request_header header;
+  /* File to use.  */
+  char file[_POSIX_PATH_MAX + 1];
+  /* Entry to write.  */
+  struct utmp utmp;
+} updwtmp_request;
+
+
+/* Header common to all replies.  */
+typedef struct
+{
+  /* Version number of the daemon interface.  */
+  int version;
+  /* Number of bytes in this reply.  */
+  size_t size;
+  /* Answer to the request.  */
+  request_type type;
+} reply_header;
+
+typedef struct
+{
+  reply_header header;
+  /* Error code.  */
+  int errnum;
+  /* Return value.  */
+  int result;
+} setutent_reply, endutent_reply, pututline_reply, updwtmp_reply;
+
+typedef struct
+{
+  reply_header header;
+  /* Found entry.  */
+  struct utmp entry;
+  /* Error code.  */
+  int errnum;
+  /* Return value.  */
+  int result;
+} getutent_reply, getutline_reply, getutid_reply;
+
+#endif /* utmpd.h  */
diff --git a/login/programs/utmpdump.c b/login/programs/utmpdump.c
new file mode 100644
index 0000000000..e1422b5028
--- /dev/null
+++ b/login/programs/utmpdump.c
@@ -0,0 +1,53 @@
+/* utmpdump - dump utmp-like files.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <error.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+#include <utmp.h>
+
+void
+print_entry (struct utmp *up)
+{
+  printf ("[%d] [%05d] [%-4.4s] [%-8.8s] [%-12.12s] [%-15.15s] [%ld]\n",
+	  up->ut_type, up->ut_pid, up->ut_id, up->ut_user,
+	  up->ut_line, 4 + ctime (&up->ut_time), up->ut_tv.tv_usec);
+}
+
+int
+main (int argc, char *argv[])
+{
+  struct utmp *up;
+
+  if (argc > 1)
+    utmpname (argv[1]);
+  
+  setutent ();
+
+  while ((up = getutent ()))
+    print_entry (up);
+
+  endutent ();
+  
+  return EXIT_SUCCESS;
+}
diff --git a/login/programs/xtmp.c b/login/programs/xtmp.c
new file mode 100644
index 0000000000..d2d5feee3b
--- /dev/null
+++ b/login/programs/xtmp.c
@@ -0,0 +1,102 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <utmp.h>
+
+#include "xtmp.h"
+
+/* Convert the entry XT to the new utmp format and store it in UT.
+   Fields in UT that were not present in the old utmp format are
+   initialized to zero.  */
+void
+xtmp_to_utmp (const struct xtmp *xtmp, struct utmp *utmp)
+{
+  memset (utmp, 0, sizeof (struct utmp));
+#if _HAVE_XT_TYPE - 0
+  utmp->ut_type = xtmp->xt_type;
+#endif
+#if _HAVE_XT_PID - 0
+  utmp->ut_pid = xtmp->xt_pid;
+#endif
+  strncpy (utmp->ut_line, xtmp->xt_line, XT_LINESIZE);
+#if _HAVE_XT_ID - 0
+  strncpy (utmp->ut_id, xtmp->xt_id, sizeof xtmp->xt_id);
+#endif
+  utmp->ut_time = xtmp->xt_time;
+  strncpy (utmp->ut_user, xtmp->xt_user, XT_NAMESIZE);
+#if _HAVE_XT_HOST - 0
+  strncpy (utmp->ut_host, xtmp->xt_host, XT_HOSTSIZE);
+#endif
+  utmp->ut_addr = xtmp->xt_addr;
+}
+
+/* Convert the entry UTMP to the old utmp format and store it in XTMP.  */
+void
+utmp_to_xtmp (const struct utmp *utmp, struct xtmp *xtmp)
+{
+  memset (xtmp, 0, sizeof (struct xtmp));
+#if _HAVE_XT_TYPE - 0
+  xtmp->xt_type = utmp->ut_type;
+#endif
+#if _HAVE_XT_PID - 0
+  xtmp->xt_pid = utmp->ut_pid;
+#endif
+  strncpy (xtmp->xt_line, utmp->ut_line, XT_LINESIZE);
+  xtmp->xt_line[XT_LINESIZE] = '\0';
+#if _HAVE_XT_ID - 0
+  strncpy (xtmp->xt_id, utmp->ut_id, sizeof xtmp->xt_id);
+#endif
+  xtmp->xt_time = utmp->ut_time;
+  strncpy (xtmp->xt_user, utmp->ut_user, XT_NAMESIZE);
+#if _HAVE_XT_HOST - 0
+  strncpy (xtmp->xt_host, utmp->ut_host, XT_HOSTSIZE);
+  xtmp->xt_host[XT_HOSTSIZE] = '\0';
+#endif
+  xtmp->xt_addr = utmp->ut_addr;
+}
+
+/* Compare an old style entry XTMP with a new style entry UTMP.  The
+   function returns 1 if the information that is in both old and new
+   style entries is identical.  Otherwise this function returns 0.  */
+int
+compare_entry (const struct utmp *xtmp, const struct utmp *utmp)
+{
+  return
+    (
+#if _HAVE_XT_TYPE - 0
+     xtmp->ut_type == utmp->ut_type
+#endif
+#if _HAVE_XT_PID - 0
+     && xtmp->ut_pid == utmp->ut_pid
+#endif
+     && !strncmp (xtmp->ut_line, utmp->ut_line, XT_LINESIZE - 1)
+#if _HAVE_XT_ID - 0
+     && !strncmp (xtmp->ut_id, utmp->ut_id, sizeof utmp->ut_id)
+#endif
+     && xtmp->ut_time == utmp->ut_time
+     && !strncmp (xtmp->ut_user, utmp->ut_user, XT_NAMESIZE)
+#if _HAVE_XT_HOST - 0
+     && !strncmp (xtmp->ut_host, utmp->ut_host, XT_HOSTSIZE - 1)
+#endif
+     && xtmp->ut_addr == utmp->ut_addr);
+}
diff --git a/login/programs/xtmp.h b/login/programs/xtmp.h
new file mode 100644
index 0000000000..8fa982ee4f
--- /dev/null
+++ b/login/programs/xtmp.h
@@ -0,0 +1,56 @@
+/* The `struct xtmp' type, describing the old linux utmp format.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef _XTMP_H
+#define _XTMP_H		1
+#include <features.h>
+
+#include <sys/time.h>
+#include <sys/types.h>
+
+
+#define XT_LINESIZE	12
+#define XT_NAMESIZE	8
+#define XT_HOSTSIZE	16
+
+struct xtmp
+{
+  short	int xt_type;		/* Type of login.  */
+  pid_t	xt_pid;			/* Pid of login process.  */
+  char	xt_line[XT_LINESIZE];	/* NUL-terminated devicename of tty.  */
+  char	xt_id[4];		/* Inittab id.  */
+  time_t xt_time;		/* Time entry was made.  */
+  char	xt_user[XT_NAMESIZE];	/* Username (not NUL terminated).  */
+  char	xt_host[XT_HOSTSIZE];	/* Hostname for remote login.  */
+  long	xt_addr;		/* Internet adress of remote host.  */
+};
+
+#define _HAVE_XT_TYPE	1
+#define _HAVE_XT_PID	1
+#define _HAVE_XT_ID	1
+#define _HAVE_XT_HOST	1
+
+
+extern void xtmp_to_utmp (const struct xtmp *xtmp, struct utmp *utmp);
+extern void utmp_to_xtmp (const struct utmp *utmp, struct xtmp *xtmp);
+extern int compare_entry (const struct utmp *xtmp,
+			  const struct utmp *utmp);
+
+#endif /* xtmp.h  */