setlocale: Enable replacement on Cygwin 1.5.

[gnulib.git] / m4 / rename.m4

diff --git a/m4/rename.m4 b/m4/rename.m4
index c458f59..6648542 100644 (file)
--- a/m4/rename.m4
+++ b/m4/rename.m4
@@ -1,6 +1,6 @@
-# serial 18
+# serial 23

 
 

-# Copyright (C) 2001, 2003, 2005, 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2001, 2003, 2005-2006, 2009-2011 Free Software Foundation, Inc.

 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.


@@ -17,52 +17,89 @@ AC_DEFUN([gl_FUNC_RENAME],
 [
   AC_REQUIRE([AC_CANONICAL_HOST])
   AC_REQUIRE([gl_STDIO_H_DEFAULTS])
 [
   AC_REQUIRE([AC_CANONICAL_HOST])
   AC_REQUIRE([gl_STDIO_H_DEFAULTS])

+  AC_CHECK_FUNCS_ONCE([lstat])

 
 

-  dnl Solaris 10 mistakenly allows rename("file","name/").
-  dnl This particular condition can be worked around without stripping
-  dnl trailing slash.
+  dnl Solaris 10, AIX 7.1 mistakenly allow rename("file","name/").
+  dnl NetBSD 1.6 mistakenly forbids rename("dir","name/").
+  dnl FreeBSD 7.2 mistakenly allows rename("file","link-to-file/").
+  dnl The Solaris bug can be worked around without stripping
+  dnl trailing slash, while the NetBSD bug requires stripping;
+  dnl the two conditions can be distinguished by whether hard
+  dnl links are also broken.

   AC_CACHE_CHECK([whether rename honors trailing slash on destination],
     [gl_cv_func_rename_slash_dst_works],
   AC_CACHE_CHECK([whether rename honors trailing slash on destination],
     [gl_cv_func_rename_slash_dst_works],

-    [rm -rf conftest.f conftest.f1
-    touch conftest.f ||
+    [rm -rf conftest.f conftest.f1 conftest.f2 conftest.d1 conftest.d2 conftest.lnk
+    touch conftest.f && touch conftest.f1 && mkdir conftest.d1 ||

       AC_MSG_ERROR([cannot create temporary files])
       AC_MSG_ERROR([cannot create temporary files])

-    AC_RUN_IFELSE([AC_LANG_PROGRAM([[
-#       include <stdio.h>
-#       include <stdlib.h>
-]], [return !rename ("conftest.f", "conftest.f1/");])],
+    # Assume that if we have lstat, we can also check symlinks.
+    if test $ac_cv_func_lstat = yes; then
+      ln -s conftest.f conftest.lnk
+    fi
+    AC_RUN_IFELSE(
+      [AC_LANG_PROGRAM([[
+#        include <stdio.h>
+#        include <stdlib.h>
+         ]],
+         [[int result = 0;
+           if (rename ("conftest.f1", "conftest.f2/") == 0)
+             result |= 1;
+           if (rename ("conftest.d1", "conftest.d2/") != 0)
+             result |= 2;
+#if HAVE_LSTAT
+           if (rename ("conftest.f", "conftest.lnk/") == 0)
+             result |= 4;
+#endif
+           return result;
+         ]])],

       [gl_cv_func_rename_slash_dst_works=yes],
       [gl_cv_func_rename_slash_dst_works=no],
       dnl When crosscompiling, assume rename is broken.
       [gl_cv_func_rename_slash_dst_works="guessing no"])
       [gl_cv_func_rename_slash_dst_works=yes],
       [gl_cv_func_rename_slash_dst_works=no],
       dnl When crosscompiling, assume rename is broken.
       [gl_cv_func_rename_slash_dst_works="guessing no"])

-    rm -rf conftest.f conftest.f1
+    rm -rf conftest.f conftest.f1 conftest.f2 conftest.d1 conftest.d2 conftest.lnk

   ])
   if test "x$gl_cv_func_rename_slash_dst_works" != xyes; then
     AC_LIBOBJ([rename])
     REPLACE_RENAME=1
     AC_DEFINE([RENAME_TRAILING_SLASH_DEST_BUG], [1],
       [Define if rename does not correctly handle slashes on the destination
   ])
   if test "x$gl_cv_func_rename_slash_dst_works" != xyes; then
     AC_LIBOBJ([rename])
     REPLACE_RENAME=1
     AC_DEFINE([RENAME_TRAILING_SLASH_DEST_BUG], [1],
       [Define if rename does not correctly handle slashes on the destination

-       argument, such as on Solaris 10.])
+       argument, such as on Solaris 10 or NetBSD 1.6.])

   fi
 
   dnl SunOS 4.1.1_U1 mistakenly forbids rename("dir/","name").
   dnl Solaris 9 mistakenly allows rename("file/","name").
   fi
 
   dnl SunOS 4.1.1_U1 mistakenly forbids rename("dir/","name").
   dnl Solaris 9 mistakenly allows rename("file/","name").

+  dnl FreeBSD 7.2 mistakenly allows rename("link-to-file/","name").

   dnl These bugs require stripping trailing slash to avoid corrupting
   dnl symlinks with a trailing slash.
   AC_CACHE_CHECK([whether rename honors trailing slash on source],
     [gl_cv_func_rename_slash_src_works],
   dnl These bugs require stripping trailing slash to avoid corrupting
   dnl symlinks with a trailing slash.
   AC_CACHE_CHECK([whether rename honors trailing slash on source],
     [gl_cv_func_rename_slash_src_works],

-    [rm -rf conftest.f conftest.d1 conftest.d2
-    touch conftest.f && mkdir conftest.d1 ||
+    [rm -rf conftest.f conftest.f1 conftest.d1 conftest.d2 conftest.d3 conftest.lnk
+    touch conftest.f && touch conftest.f1 && mkdir conftest.d1 ||

       AC_MSG_ERROR([cannot create temporary files])
       AC_MSG_ERROR([cannot create temporary files])

-    AC_RUN_IFELSE([AC_LANG_PROGRAM([[
-#       include <stdio.h>
-#       include <stdlib.h>
-]], [if (rename ("conftest.f/", "conftest.d2") == 0) return 1;
-     if (rename ("conftest.d1/", "conftest.d2") != 0) return 2;])],
+    # Assume that if we have lstat, we can also check symlinks.
+    if test $ac_cv_func_lstat = yes; then
+      ln -s conftest.f conftest.lnk
+    fi
+    AC_RUN_IFELSE(
+      [AC_LANG_PROGRAM([[
+#        include <stdio.h>
+#        include <stdlib.h>
+         ]],
+         [[int result = 0;
+           if (rename ("conftest.f1/", "conftest.d3") == 0)
+             result |= 1;
+           if (rename ("conftest.d1/", "conftest.d2") != 0)
+             result |= 2;
+#if HAVE_LSTAT
+           if (rename ("conftest.lnk/", "conftest.f") == 0)
+             result |= 4;
+#endif
+           return result;
+         ]])],

       [gl_cv_func_rename_slash_src_works=yes],
       [gl_cv_func_rename_slash_src_works=no],
       dnl When crosscompiling, assume rename is broken.
       [gl_cv_func_rename_slash_src_works="guessing no"])
       [gl_cv_func_rename_slash_src_works=yes],
       [gl_cv_func_rename_slash_src_works=no],
       dnl When crosscompiling, assume rename is broken.
       [gl_cv_func_rename_slash_src_works="guessing no"])

-    rm -rf conftest.f conftest.d1 conftest.d2
+    rm -rf conftest.f conftest.f1 conftest.d1 conftest.d2 conftest.d3 conftest.lnk

   ])
   if test "x$gl_cv_func_rename_slash_src_works" != xyes; then
     AC_LIBOBJ([rename])
   ])
   if test "x$gl_cv_func_rename_slash_src_works" != xyes; then
     AC_LIBOBJ([rename])


@@ -72,6 +109,48 @@ AC_DEFUN([gl_FUNC_RENAME],
        argument, such as on Solaris 9 or cygwin 1.5.])
   fi
 
        argument, such as on Solaris 9 or cygwin 1.5.])
   fi
 

+  dnl NetBSD 1.6 and cygwin 1.5.x mistakenly reduce hard link count
+  dnl on rename("h1","h2").
+  dnl This bug requires stat'ting targets prior to attempting rename.
+  AC_CACHE_CHECK([whether rename manages hard links correctly],
+    [gl_cv_func_rename_link_works],
+    [rm -rf conftest.f conftest.f1
+    if touch conftest.f && ln conftest.f conftest.f1 &&
+        set x `ls -i conftest.f conftest.f1` && test "$2" = "$4"; then
+      AC_RUN_IFELSE(
+        [AC_LANG_PROGRAM([[
+#          include <stdio.h>
+#          include <stdlib.h>
+#          include <unistd.h>
+           ]],
+           [[int result = 0;
+             if (rename ("conftest.f", "conftest.f1"))
+               result |= 1;
+             if (unlink ("conftest.f1"))
+               result |= 2;
+             if (rename ("conftest.f", "conftest.f"))
+               result |= 4;
+             if (rename ("conftest.f1", "conftest.f1") == 0)
+               result |= 8;
+             return result;
+           ]])],
+        [gl_cv_func_rename_link_works=yes],
+        [gl_cv_func_rename_link_works=no],
+        dnl When crosscompiling, assume rename is broken.
+        [gl_cv_func_rename_link_works="guessing no"])
+    else
+      gl_cv_func_rename_link_works="guessing no"
+    fi
+    rm -rf conftest.f conftest.f1
+  ])
+  if test "x$gl_cv_func_rename_link_works" != xyes; then
+    AC_LIBOBJ([rename])
+    REPLACE_RENAME=1
+    AC_DEFINE([RENAME_HARD_LINK_BUG], [1],
+      [Define if rename fails to leave hard links alone, as on NetBSD 1.6
+       or Cygwin 1.5.])
+  fi
+

   dnl Cygwin 1.5.x mistakenly allows rename("dir","file").
   dnl mingw mistakenly forbids rename("dir1","dir2").
   dnl These bugs require stripping trailing slash to avoid corrupting
   dnl Cygwin 1.5.x mistakenly allows rename("dir","file").
   dnl mingw mistakenly forbids rename("dir1","dir2").
   dnl These bugs require stripping trailing slash to avoid corrupting


@@ -81,22 +160,29 @@ AC_DEFUN([gl_FUNC_RENAME],
     [rm -rf conftest.f conftest.d1 conftest.d2
     touch conftest.f && mkdir conftest.d1 conftest.d2 ||
       AC_MSG_ERROR([cannot create temporary files])
     [rm -rf conftest.f conftest.d1 conftest.d2
     touch conftest.f && mkdir conftest.d1 conftest.d2 ||
       AC_MSG_ERROR([cannot create temporary files])

-    AC_RUN_IFELSE([AC_LANG_PROGRAM([[
-#       include <stdio.h>
-#       include <stdlib.h>
-]], [if (rename ("conftest.d1", "conftest.d2") != 0) return 1;
-     if (rename ("conftest.d2", "conftest.f") == 0) return 2;])],
+    AC_RUN_IFELSE(
+      [AC_LANG_PROGRAM([[
+#        include <stdio.h>
+#        include <stdlib.h>
+         ]],
+         [[int result = 0;
+           if (rename ("conftest.d1", "conftest.d2") != 0)
+             result |= 1;
+           if (rename ("conftest.d2", "conftest.f") == 0)
+             result |= 2;
+           return result;
+         ]])],

       [gl_cv_func_rename_dest_works=yes],
       [gl_cv_func_rename_dest_works=no],
       dnl When crosscompiling, assume rename is broken.
       [gl_cv_func_rename_dest_works="guessing no"])
       [gl_cv_func_rename_dest_works=yes],
       [gl_cv_func_rename_dest_works=no],
       dnl When crosscompiling, assume rename is broken.
       [gl_cv_func_rename_dest_works="guessing no"])

-    rm -rf conftest.f conftest.f1 conftest.d1 conftest.d2
+    rm -rf conftest.f conftest.d1 conftest.d2

   ])
   if test "x$gl_cv_func_rename_dest_works" != xyes; then
     AC_LIBOBJ([rename])
     REPLACE_RENAME=1
     AC_DEFINE([RENAME_DEST_EXISTS_BUG], [1],
       [Define if rename does not work when the destination file exists,
   ])
   if test "x$gl_cv_func_rename_dest_works" != xyes; then
     AC_LIBOBJ([rename])
     REPLACE_RENAME=1
     AC_DEFINE([RENAME_DEST_EXISTS_BUG], [1],
       [Define if rename does not work when the destination file exists,

-       as on Windows.])
+       as on Cygwin 1.5 or Windows.])

   fi
 ])
   fi
 ])