Update gnulib files.

21 files changed, 324 insertions, 63 deletions

diff --git a/gl/Makefile.am b/gl/Makefile.am
index b40d7bad8d..28f1560f39 100644
--- a/gl/Makefile.am
+++ b/gl/Makefile.am
@@ -677,6 +677,7 @@ stdio.h: stdio.in.h
 	      -e 's|@''GNULIB_FTELL''@|$(GNULIB_FTELL)|g' \
 	      -e 's|@''GNULIB_FTELLO''@|$(GNULIB_FTELLO)|g' \
 	      -e 's|@''GNULIB_FFLUSH''@|$(GNULIB_FFLUSH)|g' \
+	      -e 's|@''GNULIB_FPURGE''@|$(GNULIB_FPURGE)|g' \
 	      -e 's|@''GNULIB_FCLOSE''@|$(GNULIB_FCLOSE)|g' \
 	      -e 's|@''GNULIB_FPUTC''@|$(GNULIB_FPUTC)|g' \
 	      -e 's|@''GNULIB_PUTC''@|$(GNULIB_PUTC)|g' \
@@ -714,6 +715,8 @@ stdio.h: stdio.in.h
 	      -e 's|@''REPLACE_FTELLO''@|$(REPLACE_FTELLO)|g' \
 	      -e 's|@''REPLACE_FTELL''@|$(REPLACE_FTELL)|g' \
 	      -e 's|@''REPLACE_FFLUSH''@|$(REPLACE_FFLUSH)|g' \
+	      -e 's|@''REPLACE_FPURGE''@|$(REPLACE_FPURGE)|g' \
+	      -e 's|@''HAVE_DECL_FPURGE''@|$(HAVE_DECL_FPURGE)|g' \
 	      -e 's|@''REPLACE_FCLOSE''@|$(REPLACE_FCLOSE)|g' \
 	      -e 's|@''HAVE_DECL_GETDELIM''@|$(HAVE_DECL_GETDELIM)|g' \
 	      -e 's|@''HAVE_DECL_GETLINE''@|$(HAVE_DECL_GETLINE)|g' \
@@ -1058,6 +1061,7 @@ unistd.h: unistd.in.h
 	      -e 's|@''HAVE_SYS_PARAM_H''@|$(HAVE_SYS_PARAM_H)|g' \
 	      -e 's|@''REPLACE_CHOWN''@|$(REPLACE_CHOWN)|g' \
 	      -e 's|@''REPLACE_CLOSE''@|$(REPLACE_CLOSE)|g' \
+	      -e 's|@''REPLACE_DUP2''@|$(REPLACE_DUP2)|g' \
 	      -e 's|@''REPLACE_FCHDIR''@|$(REPLACE_FCHDIR)|g' \
 	      -e 's|@''REPLACE_GETCWD''@|$(REPLACE_GETCWD)|g' \
 	      -e 's|@''REPLACE_GETPAGESIZE''@|$(REPLACE_GETPAGESIZE)|g' \
diff --git a/gl/error.c b/gl/error.c
index 3177bd5d2c..af2287b271 100644
--- a/gl/error.c
+++ b/gl/error.c
@@ -1,5 +1,5 @@
 /* Error handler for noninteractive utilities
-   Copyright (C) 1990-1998, 2000-2007 Free Software Foundation, Inc.
+   Copyright (C) 1990-1998, 2000-2007, 2009 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    This program is free software: you can redistribute it and/or modify
@@ -85,6 +85,8 @@ extern void __error_at_line (int status, int errnum, const char *file_name,
 
 #else /* not _LIBC */
 
+# include <fcntl.h>
+
 # if !HAVE_DECL_STRERROR_R && STRERROR_R_CHAR_P
 #  ifndef HAVE_DECL_STRERROR_R
 "this configure-time declaration test was not run"
@@ -236,6 +238,12 @@ error (int status, int errnum, const char *message, ...)
 		   0);
 #endif
 
+#if !_LIBC && defined F_GETFL
+  /* POSIX states that fflush (stdout) after fclose is unspecified; it
+     is safe in glibc, but not on all other platforms.  fflush (NULL)
+     is always defined, but too draconian.  */
+  if (0 <= fcntl (1, F_GETFL))
+#endif
   fflush (stdout);
 #ifdef _LIBC
   _IO_flockfile (stderr);
@@ -295,6 +303,12 @@ error_at_line (int status, int errnum, const char *file_name,
 		   0);
 #endif
 
+#if !_LIBC && defined F_GETFL
+  /* POSIX states that fflush (stdout) after fclose is unspecified; it
+     is safe in glibc, but not on all other platforms.  fflush (NULL)
+     is always defined, but too draconian.  */
+  if (0 <= fcntl (1, F_GETFL))
+#endif
   fflush (stdout);
 #ifdef _LIBC
   _IO_flockfile (stderr);
diff --git a/gl/fseeko.c b/gl/fseeko.c
index cf7c42fbfd..a7ac9fc4dc 100644
--- a/gl/fseeko.c
+++ b/gl/fseeko.c
@@ -79,7 +79,7 @@ rpl_fseeko (FILE *fp, off_t offset, int whence)
       && ((fp->__modeflags & (__FLAG_READONLY | __FLAG_READING)) == 0
 	  || fp->__bufpos == fp->__bufread))
 #elif defined __QNX__               /* QNX */
-  if ((fp->_Mode & _MWRITE ? fp->_Next == fp->_Buf : fp->_Next == fp->_Rend)
+  if ((fp->_Mode & 0x2000 /* _MWRITE */ ? fp->_Next == fp->_Buf : fp->_Next == fp->_Rend)
       && fp->_Rback == fp->_Back + sizeof (fp->_Back)
       && fp->_Rsave == NULL)
 #elif defined __MINT__              /* Atari FreeMiNT */
diff --git a/gl/m4/gnulib-comp.m4 b/gl/m4/gnulib-comp.m4
index 56d0e4a036..cf3336d3cc 100644
--- a/gl/m4/gnulib-comp.m4
+++ b/gl/m4/gnulib-comp.m4
@@ -538,6 +538,8 @@ AC_DEFUN([gl_FILE_LIST], [
   tests/test-vasnprintf.c
   tests/test-vc-list-files-cvs.sh
   tests/test-vc-list-files-git.sh
+  tests/test-version-etc.c
+  tests/test-version-etc.sh
   tests/test-wchar.c
   tests/zerosize-ptr.h
   tests=lib/dummy.c
diff --git a/gl/m4/lib-link.m4 b/gl/m4/lib-link.m4
index 21442033c8..2f8b7ff38f 100644
--- a/gl/m4/lib-link.m4
+++ b/gl/m4/lib-link.m4
@@ -1,4 +1,4 @@
-# lib-link.m4 serial 19 (gettext-0.18)
+# lib-link.m4 serial 20 (gettext-0.18)
 dnl Copyright (C) 2001-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -82,7 +82,7 @@ AC_DEFUN([AC_LIB_HAVE_LINKFLAGS],
   ])
   if test "$ac_cv_lib[]Name" = yes; then
     HAVE_LIB[]NAME=yes
-    AC_DEFINE([HAVE_LIB]NAME, 1, [Define if you have the lib[]$1 library.])
+    AC_DEFINE([HAVE_LIB]NAME, 1, [Define if you have the lib][$1 library.])
     AC_MSG_CHECKING([how to link with lib[]$1])
     AC_MSG_RESULT([$LIB[]NAME])
   else
@@ -210,6 +210,9 @@ AC_DEFUN([AC_LIB_LINKFLAGS_BODY],
   LTLIB[]NAME=
   INC[]NAME=
   LIB[]NAME[]_PREFIX=
+  dnl HAVE_LIB${NAME} is an indicator that LIB${NAME}, LTLIB${NAME} have been
+  dnl computed. So it has to be reset here.
+  HAVE_LIB[]NAME=
   rpathdirs=
   ltrpathdirs=
   names_already_handled=
diff --git a/gl/m4/stdio_h.m4 b/gl/m4/stdio_h.m4
index 846b65d302..fcbe68f6ba 100644
--- a/gl/m4/stdio_h.m4
+++ b/gl/m4/stdio_h.m4
@@ -1,4 +1,4 @@
-# stdio_h.m4 serial 15
+# stdio_h.m4 serial 16
 dnl Copyright (C) 2007-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -65,6 +65,7 @@ AC_DEFUN([gl_STDIO_H_DEFAULTS],
   GNULIB_FTELL=0;                AC_SUBST([GNULIB_FTELL])
   GNULIB_FTELLO=0;               AC_SUBST([GNULIB_FTELLO])
   GNULIB_FFLUSH=0;               AC_SUBST([GNULIB_FFLUSH])
+  GNULIB_FPURGE=0;               AC_SUBST([GNULIB_FPURGE])
   GNULIB_FCLOSE=0;               AC_SUBST([GNULIB_FCLOSE])
   GNULIB_FPUTC=0;                AC_SUBST([GNULIB_FPUTC])
   GNULIB_PUTC=0;                 AC_SUBST([GNULIB_PUTC])
@@ -105,6 +106,8 @@ AC_DEFUN([gl_STDIO_H_DEFAULTS],
   REPLACE_FTELLO=0;              AC_SUBST([REPLACE_FTELLO])
   REPLACE_FTELL=0;               AC_SUBST([REPLACE_FTELL])
   REPLACE_FFLUSH=0;              AC_SUBST([REPLACE_FFLUSH])
+  REPLACE_FPURGE=0;              AC_SUBST([REPLACE_FPURGE])
+  HAVE_DECL_FPURGE=1;            AC_SUBST([HAVE_DECL_FPURGE])
   REPLACE_FCLOSE=0;              AC_SUBST([REPLACE_FCLOSE])
   HAVE_DECL_GETDELIM=1;          AC_SUBST([HAVE_DECL_GETDELIM])
   HAVE_DECL_GETLINE=1;           AC_SUBST([HAVE_DECL_GETLINE])
diff --git a/gl/m4/unistd_h.m4 b/gl/m4/unistd_h.m4
index ff9a4ea0a5..96fddba7fe 100644
--- a/gl/m4/unistd_h.m4
+++ b/gl/m4/unistd_h.m4
@@ -1,4 +1,4 @@
-# unistd_h.m4 serial 17
+# unistd_h.m4 serial 18
 dnl Copyright (C) 2006-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -73,6 +73,7 @@ AC_DEFUN([gl_UNISTD_H_DEFAULTS],
   HAVE_SYS_PARAM_H=0;     AC_SUBST([HAVE_SYS_PARAM_H])
   REPLACE_CHOWN=0;        AC_SUBST([REPLACE_CHOWN])
   REPLACE_CLOSE=0;        AC_SUBST([REPLACE_CLOSE])
+  REPLACE_DUP2=0;         AC_SUBST([REPLACE_DUP2])
   REPLACE_FCHDIR=0;       AC_SUBST([REPLACE_FCHDIR])
   REPLACE_GETCWD=0;       AC_SUBST([REPLACE_GETCWD])
   REPLACE_GETPAGESIZE=0;  AC_SUBST([REPLACE_GETPAGESIZE])
diff --git a/gl/socket.c b/gl/socket.c
index 1fa6928747..8ce4bae8db 100644
--- a/gl/socket.c
+++ b/gl/socket.c
@@ -1,6 +1,6 @@
 /* socket.c --- wrappers for Windows socket function
 
-   Copyright (C) 2008 Free Software Foundation, Inc.
+   Copyright (C) 2008-2009 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -26,12 +26,18 @@
 /* Get set_winsock_errno, FD_TO_SOCKET etc. */
 #include "w32sock.h"
 
+#include "sockets.h"
+
 int
 rpl_socket (int domain, int type, int protocol)
 {
+  SOCKET fh;
+
+  gl_sockets_startup (SOCKETS_1_1);
+
   /* We have to use WSASocket() to create non-overlapped IO sockets.
      Overlapped IO sockets cannot be used with read/write.  */
-  SOCKET fh = WSASocket (domain, type, protocol, NULL, 0, 0);
+  fh = WSASocket (domain, type, protocol, NULL, 0, 0);
 
   if (fh == INVALID_SOCKET)
     {
diff --git a/gl/sockets.c b/gl/sockets.c
index 9d5c547928..7cb9981d12 100644
--- a/gl/sockets.c
+++ b/gl/sockets.c
@@ -69,23 +69,31 @@ close_fd_maybe_socket (int fd, const struct close_hook *remaining_list)
 
 static struct close_hook close_sockets_hook;
 
+static int initialized_sockets_version /* = 0 */;
+
 #endif
 
 int
 gl_sockets_startup (int version)
 {
 #if WINDOWS_SOCKETS
-  WSADATA data;
-  int err;
+  if (version > initialized_sockets_version)
+    {
+      WSADATA data;
+      int err;
 
-  err = WSAStartup (version, &data);
-  if (err != 0)
-    return 1;
+      err = WSAStartup (version, &data);
+      if (err != 0)
+	return 1;
+
+      if (data.wVersion < version)
+	return 2;
 
-  if (data.wVersion < version)
-    return 2;
+      if (initialized_sockets_version == 0)
+	register_close_hook (close_fd_maybe_socket, &close_sockets_hook);
 
-  register_close_hook (close_fd_maybe_socket, &close_sockets_hook);
+      initialized_sockets_version = version;
+    }
 #endif
 
   return 0;
@@ -97,6 +105,8 @@ gl_sockets_cleanup (void)
 #if WINDOWS_SOCKETS
   int err;
 
+  initialized_sockets_version = 0;
+
   unregister_close_hook (&close_sockets_hook);
 
   err = WSACleanup ();
diff --git a/gl/stdio.in.h b/gl/stdio.in.h
index cb273d7642..0445c6f107 100644
--- a/gl/stdio.in.h
+++ b/gl/stdio.in.h
@@ -1,6 +1,6 @@
 /* A GNU-like <stdio.h>.
 
-   Copyright (C) 2004, 2007-2008 Free Software Foundation, Inc.
+   Copyright (C) 2004, 2007-2009 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -407,6 +407,24 @@ extern long rpl_ftell (FILE *fp);
     fflush (f))
 #endif
 
+#if @GNULIB_FPURGE@
+# if @REPLACE_FPURGE@
+#  define fpurge rpl_fpurge
+# endif
+# if @REPLACE_FPURGE@ || !@HAVE_DECL_FPURGE@
+  /* Discard all pending buffered I/O data on STREAM.
+     STREAM must not be wide-character oriented.
+     Return 0 if successful.  Upon error, return -1 and set errno.  */
+  extern int fpurge (FILE *gl_stream);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef fpurge
+# define fpurge(f) \
+   (GL_LINK_WARNING ("fpurge is not always present - " \
+                     "use gnulib module fpurge for portability"), \
+    fpurge (f))
+#endif
+
 #if @GNULIB_FCLOSE@
 # if @REPLACE_FCLOSE@
 #  define fclose rpl_fclose
diff --git a/gl/tests/Makefile.am b/gl/tests/Makefile.am
index ecb33b656e..0b753ae949 100644
--- a/gl/tests/Makefile.am
+++ b/gl/tests/Makefile.am
@@ -384,6 +384,16 @@ libtests_a_SOURCES += verify.h
 
 ## end   gnulib module verify
 
+## begin gnulib module version-etc-tests
+
+TESTS += test-version-etc.sh
+TESTS_ENVIRONMENT += EXEEXT='@EXEEXT@'
+check_PROGRAMS += test-version-etc
+test_version_etc_LDADD = $(LDADD) @LIBINTL@
+EXTRA_DIST += test-version-etc.c test-version-etc.sh
+
+## end   gnulib module version-etc-tests
+
 ## begin gnulib module wchar-tests
 
 TESTS += test-wchar
diff --git a/gl/tests/test-select.c b/gl/tests/test-select.c
index 4c9cdc02dc..ec82250149 100644
--- a/gl/tests/test-select.c
+++ b/gl/tests/test-select.c
@@ -1,5 +1,5 @@
 /* Test of select() substitute.
-   Copyright (C) 2008 Free Software Foundation, Inc.
+   Copyright (C) 2008-2009 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -29,7 +29,6 @@
 #include <stdbool.h>
 #include <sys/ioctl.h>
 #include <errno.h>
-#include "sockets.h"
 
 enum { SEL_IN = 1, SEL_OUT = 2, SEL_EXC = 4 };
 
@@ -360,8 +359,6 @@ main ()
 {
   int result;
 
-  gl_sockets_startup (SOCKETS_1_1);
-
 #ifdef INTERACTIVE
   printf ("Please press Enter\n");
   test (test_tty, "TTY");
diff --git a/gl/tests/test-stdio.c b/gl/tests/test-stdio.c
index a5efa320ba..dcfe38dd51 100644
--- a/gl/tests/test-stdio.c
+++ b/gl/tests/test-stdio.c
@@ -1,5 +1,5 @@
 /* Test of <stdio.h> substitute.
-   Copyright (C) 2007 Free Software Foundation, Inc.
+   Copyright (C) 2007, 2009 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -20,9 +20,15 @@
 
 #include <stdio.h>
 
+#include "verify.h"
+
 /* Check that the various SEEK_* macros are defined.  */
 int sk[] = { SEEK_CUR, SEEK_END, SEEK_SET };
 
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
 int
 main ()
 {
diff --git a/gl/tests/test-stdlib.c b/gl/tests/test-stdlib.c
index e103d46b20..ae46ba1662 100644
--- a/gl/tests/test-stdlib.c
+++ b/gl/tests/test-stdlib.c
@@ -1,5 +1,5 @@
 /* Test of <stdlib.h> substitute.
-   Copyright (C) 2007 Free Software Foundation, Inc.
+   Copyright (C) 2007, 2009 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -20,8 +20,14 @@
 
 #include <stdlib.h>
 
+#include "verify.h"
+
 int exitcode;
 
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
 int
 main ()
 {
diff --git a/gl/tests/test-string.c b/gl/tests/test-string.c
index 68014f54c8..fe53cd9b15 100644
--- a/gl/tests/test-string.c
+++ b/gl/tests/test-string.c
@@ -1,5 +1,5 @@
 /* Test of <string.h> substitute.
-   Copyright (C) 2007 Free Software Foundation, Inc.
+   Copyright (C) 2007, 2009 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -20,6 +20,12 @@
 
 #include <string.h>
 
+#include "verify.h"
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
 int
 main ()
 {
diff --git a/gl/tests/test-unistd.c b/gl/tests/test-unistd.c
index 5fed15cf9f..129367b4d7 100644
--- a/gl/tests/test-unistd.c
+++ b/gl/tests/test-unistd.c
@@ -20,6 +20,12 @@
 
 #include <unistd.h>
 
+#include "verify.h"
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
 /* Check that the various SEEK_* macros are defined.  */
 int sk[] = { SEEK_CUR, SEEK_END, SEEK_SET };
 
diff --git a/gl/tests/test-version-etc.c b/gl/tests/test-version-etc.c
new file mode 100644
index 0000000000..71cbc8bac4
--- /dev/null
+++ b/gl/tests/test-version-etc.c
@@ -0,0 +1,33 @@
+/* Test suite for version-etc.
+   Copyright (C) 2009 Free Software Foundation, Inc.
+   This file is part of the GNUlib Library.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "version-etc.h"
+
+#include "progname.h"
+
+#define AUTHORS "Sergey Poznyakoff", "Eric Blake"
+
+int
+main (int argc, char **argv)
+{
+  set_program_name (argv[0]);
+  version_etc (stdout, "test-version-etc", "dummy", "0", AUTHORS,
+               (const char *) NULL);
+  return 0;
+}
diff --git a/gl/tests/test-version-etc.sh b/gl/tests/test-version-etc.sh
new file mode 100755
index 0000000000..3b2fc4db80
--- /dev/null
+++ b/gl/tests/test-version-etc.sh
@@ -0,0 +1,40 @@
+#! /bin/sh
+# Test suite for version-etc.
+# Copyright (C) 2009 Free Software Foundation, Inc.
+# This file is part of the GNUlib Library.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+TMP=ve-expected.tmp
+LC_ALL=C
+export LC_ALL
+ERR=0
+
+cat > $TMP <<EOT
+test-version-etc (dummy) 0
+COPYRIGHT Free Software Foundation, Inc.
+License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
+
+Written by Sergey Poznyakoff and Eric Blake.
+EOT
+
+./test-version-etc --version |
+ sed '2s/Copyright (C) [0-9]\{4,4\}/COPYRIGHT/' |
+ diff -c $TMP - || ERR=1
+
+rm $TMP
+
+exit $ERR
diff --git a/gl/unistd.in.h b/gl/unistd.in.h
index fa8d84a3d9..09e90392df 100644
--- a/gl/unistd.in.h
+++ b/gl/unistd.in.h
@@ -150,10 +150,13 @@ extern int close (int);
 
 
 #if @GNULIB_DUP2@
-# if !@HAVE_DUP2@
+# if @REPLACE_DUP2@
+#  define dup2 rpl_dup2
+# endif
+# if !@HAVE_DUP2@ || @REPLACE_DUP2@
 /* Copy the file descriptor OLDFD into file descriptor NEWFD.  Do nothing if
    NEWFD = OLDFD, otherwise close NEWFD first if it is open.
-   Return 0 if successful, otherwise -1 and errno set.
+   Return newfd if successful, otherwise -1 and errno set.
    See the POSIX:2001 specification
    <http://www.opengroup.org/susv3xsh/dup2.html>.  */
 extern int dup2 (int oldfd, int newfd);
@@ -214,7 +217,11 @@ extern int fchdir (int /*fd*/);
 
 #  define dup rpl_dup
 extern int dup (int);
-#  define dup2 rpl_dup2
+
+#  if @REPLACE_DUP2@
+#   undef dup2
+#  endif
+#  define dup2 rpl_dup2_fchdir
 extern int dup2 (int, int);
 
 # endif
diff --git a/gl/version-etc.c b/gl/version-etc.c
index c3b028926b..a580140c45 100644
--- a/gl/version-etc.c
+++ b/gl/version-etc.c
@@ -34,26 +34,30 @@
 
 enum { COPYRIGHT_YEAR = 2009 };
 
-/* Like version_etc, below, but with the NULL-terminated author list
-   provided via a variable of type va_list.  */
-void
-version_etc_va (FILE *stream,
-		const char *command_name, const char *package,
-		const char *version, va_list authors)
-{
-  size_t n_authors;
+/* The three functions below display the --version information the
+   standard way.
+
+   If COMMAND_NAME is NULL, the PACKAGE is assumed to be the name of
+   the program.  The formats are therefore:
+
+   PACKAGE VERSION
 
-  /* Count the number of authors.  */
-  {
-    va_list tmp_authors;
+   or
 
-    va_copy (tmp_authors, authors);
+   COMMAND_NAME (PACKAGE) VERSION.
 
-    n_authors = 0;
-    while (va_arg (tmp_authors, const char *) != NULL)
-      ++n_authors;
-  }
+   The functions differ in the way they are passed author names. */
+
+/* Display the --version information the standard way.
 
+   Author names are given in the array AUTHORS. N_AUTHORS is the
+   number of elements in the array. */
+void
+version_etc_arn (FILE *stream,
+		 const char *command_name, const char *package,
+		 const char *version,
+		 const char * const * authors, size_t n_authors)
+{
   if (command_name)
     fprintf (stream, "%s (%s) %s\n", command_name, package, version);
   else
@@ -89,57 +93,64 @@ There is NO WARRANTY, to the extent permitted by law.\n\
       abort ();
     case 1:
       /* TRANSLATORS: %s denotes an author name.  */
-      vfprintf (stream, _("Written by %s.\n"), authors);
+      fprintf (stream, _("Written by %s.\n"), authors[0]);
       break;
     case 2:
       /* TRANSLATORS: Each %s denotes an author name.  */
-      vfprintf (stream, _("Written by %s and %s.\n"), authors);
+      fprintf (stream, _("Written by %s and %s.\n"), authors[0], authors[1]);
       break;
     case 3:
       /* TRANSLATORS: Each %s denotes an author name.  */
-      vfprintf (stream, _("Written by %s, %s, and %s.\n"), authors);
+      fprintf (stream, _("Written by %s, %s, and %s.\n"),
+	       authors[0], authors[1], authors[2]);
       break;
     case 4:
       /* TRANSLATORS: Each %s denotes an author name.
 	 You can use line breaks, estimating that each author name occupies
 	 ca. 16 screen columns and that a screen line has ca. 80 columns.  */
-      vfprintf (stream, _("Written by %s, %s, %s,\nand %s.\n"), authors);
+      fprintf (stream, _("Written by %s, %s, %s,\nand %s.\n"),
+	       authors[0], authors[1], authors[2], authors[3]);
       break;
     case 5:
       /* TRANSLATORS: Each %s denotes an author name.
 	 You can use line breaks, estimating that each author name occupies
 	 ca. 16 screen columns and that a screen line has ca. 80 columns.  */
-      vfprintf (stream, _("Written by %s, %s, %s,\n%s, and %s.\n"), authors);
+      fprintf (stream, _("Written by %s, %s, %s,\n%s, and %s.\n"),
+	       authors[0], authors[1], authors[2], authors[3], authors[4]);
       break;
     case 6:
       /* TRANSLATORS: Each %s denotes an author name.
 	 You can use line breaks, estimating that each author name occupies
 	 ca. 16 screen columns and that a screen line has ca. 80 columns.  */
-      vfprintf (stream, _("Written by %s, %s, %s,\n%s, %s, and %s.\n"),
-		authors);
+      fprintf (stream, _("Written by %s, %s, %s,\n%s, %s, and %s.\n"),
+	       authors[0], authors[1], authors[2], authors[3], authors[4],
+	       authors[5]);
       break;
     case 7:
       /* TRANSLATORS: Each %s denotes an author name.
 	 You can use line breaks, estimating that each author name occupies
 	 ca. 16 screen columns and that a screen line has ca. 80 columns.  */
-      vfprintf (stream, _("Written by %s, %s, %s,\n%s, %s, %s, and %s.\n"),
-		authors);
+      fprintf (stream, _("Written by %s, %s, %s,\n%s, %s, %s, and %s.\n"),
+	       authors[0], authors[1], authors[2], authors[3], authors[4],
+	       authors[5], authors[6]);
       break;
     case 8:
       /* TRANSLATORS: Each %s denotes an author name.
 	 You can use line breaks, estimating that each author name occupies
 	 ca. 16 screen columns and that a screen line has ca. 80 columns.  */
-      vfprintf (stream, _("\
+      fprintf (stream, _("\
 Written by %s, %s, %s,\n%s, %s, %s, %s,\nand %s.\n"),
-		authors);
+		authors[0], authors[1], authors[2], authors[3], authors[4],
+		authors[5], authors[6], authors[7]);
       break;
     case 9:
       /* TRANSLATORS: Each %s denotes an author name.
 	 You can use line breaks, estimating that each author name occupies
 	 ca. 16 screen columns and that a screen line has ca. 80 columns.  */
-      vfprintf (stream, _("\
+      fprintf (stream, _("\
 Written by %s, %s, %s,\n%s, %s, %s, %s,\n%s, and %s.\n"),
-		authors);
+	       authors[0], authors[1], authors[2], authors[3], authors[4],
+	       authors[5], authors[6], authors[7], authors[8]);
       break;
     default:
       /* 10 or more authors.  Use an abbreviation, since the human reader
@@ -147,18 +158,55 @@ Written by %s, %s, %s,\n%s, %s, %s, %s,\n%s, and %s.\n"),
       /* TRANSLATORS: Each %s denotes an author name.
 	 You can use line breaks, estimating that each author name occupies
 	 ca. 16 screen columns and that a screen line has ca. 80 columns.  */
-      vfprintf (stream, _("\
+      fprintf (stream, _("\
 Written by %s, %s, %s,\n%s, %s, %s, %s,\n%s, %s, and others.\n"),
-		authors);
+		authors[0], authors[1], authors[2], authors[3], authors[4],
+		authors[5], authors[6], authors[7], authors[8]);
       break;
     }
-  va_end (authors);
+}
+
+/* Display the --version information the standard way.  See the initial
+   comment to this module, for more information.
+
+   Author names are given in the NULL-terminated array AUTHORS. */
+void
+version_etc_ar (FILE *stream,
+		const char *command_name, const char *package,
+		const char *version, const char * const * authors)
+{
+  size_t n_authors;
+
+  for (n_authors = 0; authors[n_authors]; n_authors++)
+    ;
+  version_etc_arn (stream, command_name, package, version, authors, n_authors);
+}
+
+/* Display the --version information the standard way.  See the initial
+   comment to this module, for more information.
+
+   Author names are given in the NULL-terminated va_list AUTHORS. */
+void
+version_etc_va (FILE *stream,
+		const char *command_name, const char *package,
+		const char *version, va_list authors)
+{
+  size_t n_authors;
+  const char *authtab[10];
+
+  for (n_authors = 0;
+       n_authors < 10
+	 && (authtab[n_authors] = va_arg (authors, const char *)) != NULL;
+       n_authors++)
+    ;
+  version_etc_arn (stream, command_name, package, version,
+		   authtab, n_authors);
 }
 
 
 /* Display the --version information the standard way.
 
-   If COMMAND_NAME is NULL, the PACKAGE is asumed to be the name of
+   If COMMAND_NAME is NULL, the PACKAGE is assumed to be the name of
    the program.  The formats are therefore:
 
    PACKAGE VERSION
@@ -167,7 +215,7 @@ Written by %s, %s, %s,\n%s, %s, %s, %s,\n%s, %s, and others.\n"),
 
    COMMAND_NAME (PACKAGE) VERSION.
 
-   The author names are passed as separate arguments, with an additional
+   The authors names are passed as separate arguments, with an additional
    NULL argument at the end.  */
 void
 version_etc (FILE *stream,
@@ -178,6 +226,7 @@ version_etc (FILE *stream,
 
   va_start (authors, version);
   version_etc_va (stream, command_name, package, version, authors);
+  va_end (authors);
 }
 
 void
@@ -195,5 +244,5 @@ emit_bug_reporting_address (void)
   printf (_("%s home page: <http://www.gnu.org/software/%s/>.\n"),
 	  PACKAGE_NAME, PACKAGE);
   fputs (_("General help using GNU software: <http://www.gnu.org/gethelp/>.\n"),
-         stdout);
+	 stdout);
 }
diff --git a/gl/version-etc.h b/gl/version-etc.h
index 33a8e7f143..8ce02fecb8 100644
--- a/gl/version-etc.h
+++ b/gl/version-etc.h
@@ -22,17 +22,57 @@
 # include <stdarg.h>
 # include <stdio.h>
 
+/* The `sentinel' attribute was added in gcc 4.0.  */
+#ifndef ATTRIBUTE_SENTINEL
+# if 4 <= __GNUC__
+#  define ATTRIBUTE_SENTINEL __attribute__ ((__sentinel__))
+# else
+#  define ATTRIBUTE_SENTINEL /* empty */
+# endif
+#endif
+
 extern const char version_etc_copyright[];
 
+/* The three functions below display the --version information in the
+   standard way: command and package names, package version, followed
+   by a short GPLv3+ notice and a list of up to 10 author names.
+
+   If COMMAND_NAME is NULL, the PACKAGE is asumed to be the name of
+   the program.  The formats are therefore:
+
+   PACKAGE VERSION
+
+   or
+
+   COMMAND_NAME (PACKAGE) VERSION.
+
+   The functions differ in the way they are passed author names: */
+
+/* N_AUTHORS names are supplied in array AUTHORS.  */
+extern void version_etc_arn (FILE *stream,
+			     const char *command_name, const char *package,
+			     const char *version,
+			     const char * const * authors, size_t n_authors);
+
+/* Names are passed in the NULL-terminated array AUTHORS.  */
+extern void version_etc_ar (FILE *stream,
+			    const char *command_name, const char *package,
+			    const char *version, const char * const * authors);
+
+/* Names are passed in the NULL-terminated va_list.  */
 extern void version_etc_va (FILE *stream,
 			    const char *command_name, const char *package,
 			    const char *version, va_list authors);
 
+/* Names are passed as separate arguments, with an additional
+   NULL argument at the end.  */
 extern void version_etc (FILE *stream,
 			 const char *command_name, const char *package,
 			 const char *version,
-			 /* const char *author1, ...*/ ...);
+			 /* const char *author1, ..., NULL */ ...)
+  ATTRIBUTE_SENTINEL;
 
+/* Display the usual `Report bugs to' stanza */
 extern void emit_bug_reporting_address (void);
 
 #endif /* VERSION_ETC_H */