Merge from gnulib.

This incorporates:
2014-10-18 readlinkat: port to AIX 7.1
2014-10-07 fcntl: fix error reporting by dupfd
* lib/fcntl.c, lib/readlinkat.c, lib/unistd.in.h, m4/readlinkat.m4:
* m4/unistd_h.m4: Update from gnulib.
* lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.

4 files changed, 74 insertions, 19 deletions

diff --git a/lib/fcntl.c b/lib/fcntl.c
index 54f748606b7..1e35dd1a4f9 100644
--- a/lib/fcntl.c
+++ b/lib/fcntl.c
@@ -89,8 +89,25 @@ dupfd (int oldfd, int newfd, int flags)
                             inherit,                /* InheritHandle */
                             DUPLICATE_SAME_ACCESS)) /* Options */
         {
-          /* TODO: Translate GetLastError () into errno.  */
-          errno = EMFILE;
+          switch (GetLastError ())
+            {
+              case ERROR_TOO_MANY_OPEN_FILES:
+                errno = EMFILE;
+                break;
+              case ERROR_INVALID_HANDLE:
+              case ERROR_INVALID_TARGET_HANDLE:
+              case ERROR_DIRECT_ACCESS_HANDLE:
+                errno = EBADF;
+                break;
+              case ERROR_INVALID_PARAMETER:
+              case ERROR_INVALID_FUNCTION:
+              case ERROR_INVALID_ACCESS:
+                errno = EINVAL;
+                break;
+              default:
+                errno = EACCES;
+                break;
+            }
           result = -1;
           break;
         }
@@ -98,7 +115,6 @@ dupfd (int oldfd, int newfd, int flags)
       if (duplicated_fd < 0)
         {
           CloseHandle (new_handle);
-          errno = EMFILE;
           result = -1;
           break;
         }
diff --git a/lib/gnulib.mk b/lib/gnulib.mk
index 5ba7de10d0b..6437a9d7541 100644
--- a/lib/gnulib.mk
+++ b/lib/gnulib.mk
@@ -21,7 +21,7 @@
 # the same distribution terms as the rest of that program.
 #
 # Generated by gnulib-tool.
-# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --avoid=close --avoid=dup --avoid=fchdir --avoid=fstat --avoid=malloc-posix --avoid=msvc-inval --avoid=msvc-nothrow --avoid=open --avoid=openat-die --avoid=opendir --avoid=raise --avoid=save-cwd --avoid=select --avoid=sigprocmask --avoid=stdarg --avoid=stdbool --avoid=threadlib --makefile-name=gnulib.mk --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt binary-io byteswap c-ctype c-strcase careadlinkat close-stream count-one-bits count-trailing-zeros crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 dtoastr dtotimespec dup2 environ execinfo faccessat fcntl fcntl-h fdatasync fdopendir filemode fstatat fsync getloadavg getopt-gnu gettime gettimeofday intprops largefile lstat manywarnings memrchr mkostemp mktime pipe2 pselect pthread_sigmask putenv qacl readlink readlinkat sig2str socklen stat-time stdalign stdio strftime strtoimax strtoumax symlink sys_stat sys_time time timer-time timespec-add timespec-sub unsetenv update-copyright utimens vla warnings
+# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --avoid=close --avoid=dup --avoid=fchdir --avoid=fstat --avoid=malloc-posix --avoid=msvc-inval --avoid=msvc-nothrow --avoid=open --avoid=openat-die --avoid=opendir --avoid=raise --avoid=save-cwd --avoid=select --avoid=sigprocmask --avoid=stdarg --avoid=stdbool --avoid=threadlib --makefile-name=gnulib.mk --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt binary-io byteswap c-ctype c-strcase careadlinkat close-stream count-one-bits count-trailing-zeros crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 dtoastr dtotimespec dup2 environ execinfo faccessat fcntl fcntl-h fdatasync fdopendir filemode fstatat fsync getloadavg getopt-gnu gettime gettimeofday intprops largefile lstat manywarnings memrchr mkostemp mktime pipe2 pselect pthread_sigmask putenv qacl readlink readlinkat sig2str socklen stat-time stdalign stdio strftime strtoimax strtoumax symlink sys_stat sys_time time time_r timer-time timespec-add timespec-sub unsetenv update-copyright utimens vla warnings
 
 
 MOSTLYCLEANFILES += core *.stackdump
@@ -1748,9 +1748,11 @@ unistd.h: unistd.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H
               -e 's|@''REPLACE_PWRITE''@|$(REPLACE_PWRITE)|g' \
               -e 's|@''REPLACE_READ''@|$(REPLACE_READ)|g' \
               -e 's|@''REPLACE_READLINK''@|$(REPLACE_READLINK)|g' \
+              -e 's|@''REPLACE_READLINKAT''@|$(REPLACE_READLINKAT)|g' \
               -e 's|@''REPLACE_RMDIR''@|$(REPLACE_RMDIR)|g' \
               -e 's|@''REPLACE_SLEEP''@|$(REPLACE_SLEEP)|g' \
               -e 's|@''REPLACE_SYMLINK''@|$(REPLACE_SYMLINK)|g' \
+              -e 's|@''REPLACE_SYMLINKAT''@|$(REPLACE_SYMLINKAT)|g' \
               -e 's|@''REPLACE_TTYNAME_R''@|$(REPLACE_TTYNAME_R)|g' \
               -e 's|@''REPLACE_UNLINK''@|$(REPLACE_UNLINK)|g' \
               -e 's|@''REPLACE_UNLINKAT''@|$(REPLACE_UNLINKAT)|g' \
diff --git a/lib/readlinkat.c b/lib/readlinkat.c
index c8a60500f18..83ea0af02e4 100644
--- a/lib/readlinkat.c
+++ b/lib/readlinkat.c
@@ -20,6 +20,18 @@
 
 #include <unistd.h>
 
+#if HAVE_READLINKAT
+
+# undef readlinkat
+
+ssize_t
+rpl_readlinkat (int fd, char const *file, char *buf, size_t len)
+{
+  return readlinkat (fd, file, buf, len);
+}
+
+#else
+
 /* Gnulib provides a readlink stub for mingw; use it for distinction
    between EINVAL and ENOENT, rather than always failing with ENOSYS.  */
 
@@ -34,14 +46,16 @@
    then readlink/restore_cwd.  If either the save_cwd or the restore_cwd
    fails, then give a diagnostic and exit nonzero.  */
 
-#define AT_FUNC_NAME readlinkat
-#define AT_FUNC_F1 readlink
-#define AT_FUNC_POST_FILE_PARAM_DECLS , char *buf, size_t len
-#define AT_FUNC_POST_FILE_ARGS        , buf, len
-#define AT_FUNC_RESULT ssize_t
-#include "at-func.c"
-#undef AT_FUNC_NAME
-#undef AT_FUNC_F1
-#undef AT_FUNC_POST_FILE_PARAM_DECLS
-#undef AT_FUNC_POST_FILE_ARGS
-#undef AT_FUNC_RESULT
+# define AT_FUNC_NAME readlinkat
+# define AT_FUNC_F1 readlink
+# define AT_FUNC_POST_FILE_PARAM_DECLS , char *buf, size_t len
+# define AT_FUNC_POST_FILE_ARGS        , buf, len
+# define AT_FUNC_RESULT ssize_t
+# include "at-func.c"
+# undef AT_FUNC_NAME
+# undef AT_FUNC_F1
+# undef AT_FUNC_POST_FILE_PARAM_DECLS
+# undef AT_FUNC_POST_FILE_ARGS
+# undef AT_FUNC_RESULT
+
+#endif
diff --git a/lib/unistd.in.h b/lib/unistd.in.h
index 622b2287577..bbbfd75bdd6 100644
--- a/lib/unistd.in.h
+++ b/lib/unistd.in.h
@@ -1287,13 +1287,24 @@ _GL_WARN_ON_USE (readlink, "readlink is unportable - "
 
 
 #if @GNULIB_READLINKAT@
-# if !@HAVE_READLINKAT@
+# if @REPLACE_READLINKAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   define readlinkat rpl_readlinkat
+#  endif
+_GL_FUNCDECL_RPL (readlinkat, ssize_t,
+                  (int fd, char const *file, char *buf, size_t len)
+                  _GL_ARG_NONNULL ((2, 3)));
+_GL_CXXALIAS_RPL (readlinkat, ssize_t,
+                  (int fd, char const *file, char *buf, size_t len));
+# else
+#  if !@HAVE_READLINKAT@
 _GL_FUNCDECL_SYS (readlinkat, ssize_t,
                   (int fd, char const *file, char *buf, size_t len)
                   _GL_ARG_NONNULL ((2, 3)));
-# endif
+#  endif
 _GL_CXXALIAS_SYS (readlinkat, ssize_t,
                   (int fd, char const *file, char *buf, size_t len));
+# endif
 _GL_CXXALIASWARN (readlinkat);
 #elif defined GNULIB_POSIXCHECK
 # undef readlinkat
@@ -1407,13 +1418,25 @@ _GL_WARN_ON_USE (symlink, "symlink is not portable - "
 
 
 #if @GNULIB_SYMLINKAT@
-# if !@HAVE_SYMLINKAT@
+# if @REPLACE_SYMLINKAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef symlinkat
+#   define symlinkat rpl_symlinkat
+#  endif
+_GL_FUNCDECL_RPL (symlinkat, int,
+                  (char const *contents, int fd, char const *file)
+                  _GL_ARG_NONNULL ((1, 3)));
+_GL_CXXALIAS_RPL (symlinkat, int,
+                  (char const *contents, int fd, char const *file));
+# else
+#  if !@HAVE_SYMLINKAT@
 _GL_FUNCDECL_SYS (symlinkat, int,
                   (char const *contents, int fd, char const *file)
                   _GL_ARG_NONNULL ((1, 3)));
-# endif
+#  endif
 _GL_CXXALIAS_SYS (symlinkat, int,
                   (char const *contents, int fd, char const *file));
+# endif
 _GL_CXXALIASWARN (symlinkat);
 #elif defined GNULIB_POSIXCHECK
 # undef symlinkat