X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Frename.m4;h=c938b0d00ef0e38d68316abcde2b607ba75bc2c2;hb=77e666785ee842df490daf6a4e51c4b0645431e5;hp=2c0d5e86f05b64e85696c4f20be2d5e411a6f8f1;hpb=add9fba5e1e248ac77e6abe31749a10cd2672d77;p=gnulib.git diff --git a/m4/rename.m4 b/m4/rename.m4 index 2c0d5e86f..c938b0d00 100644 --- a/m4/rename.m4 +++ b/m4/rename.m4 @@ -1,6 +1,6 @@ -# serial 16 +# serial 24 -# 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. @@ -17,45 +17,168 @@ AC_DEFUN([gl_FUNC_RENAME], [ AC_REQUIRE([AC_CANONICAL_HOST]) AC_REQUIRE([gl_STDIO_H_DEFAULTS]) + AC_CHECK_FUNCS_ONCE([lstat]) + + 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], + [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]) + # Assume that if we have lstat, we can also check symlinks. + if test $ac_cv_func_lstat = yes; then + ln -s conftest.f conftest.lnk + fi + AC_RUN_IFELSE( + [AC_LANG_PROGRAM([[ +# include +# include + ]], + [[int result = 0; + if (rename ("conftest.f1", "conftest.f2/") == 0) + result |= 1; + if (rename ("conftest.d1", "conftest.d2/") != 0) + result |= 2; +#if HAVE_LSTAT + if (rename ("conftest.f", "conftest.lnk/") == 0) + result |= 4; +#endif + return result; + ]])], + [gl_cv_func_rename_slash_dst_works=yes], + [gl_cv_func_rename_slash_dst_works=no], + dnl When crosscompiling, assume rename is broken. + [gl_cv_func_rename_slash_dst_works="guessing no"]) + rm -rf conftest.f conftest.f1 conftest.f2 conftest.d1 conftest.d2 conftest.lnk + ]) + if test "x$gl_cv_func_rename_slash_dst_works" != xyes; then + 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 or NetBSD 1.6.]) + 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], - [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_RUN_IFELSE([AC_LANG_PROGRAM([[ -# include -# include -]], [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 $ac_cv_func_lstat = yes; then + ln -s conftest.f conftest.lnk + fi + AC_RUN_IFELSE( + [AC_LANG_PROGRAM([[ +# include +# include + ]], + [[int result = 0; + if (rename ("conftest.f1/", "conftest.d3") == 0) + result |= 1; + if (rename ("conftest.d1/", "conftest.d2") != 0) + result |= 2; +#if HAVE_LSTAT + if (rename ("conftest.lnk/", "conftest.f") == 0) + result |= 4; +#endif + return result; + ]])], [gl_cv_func_rename_slash_src_works=yes], [gl_cv_func_rename_slash_src_works=no], dnl When crosscompiling, assume rename is broken. [gl_cv_func_rename_slash_src_works="guessing no"]) - rm -rf conftest.f conftest.d1 conftest.d2 + rm -rf conftest.f conftest.f1 conftest.d1 conftest.d2 conftest.d3 conftest.lnk ]) if test "x$gl_cv_func_rename_slash_src_works" != xyes; then - AC_LIBOBJ([rename]) REPLACE_RENAME=1 - AC_DEFINE([RENAME_TRAILING_SLASH_BUG], [1], + AC_DEFINE([RENAME_TRAILING_SLASH_SOURCE_BUG], [1], [Define if rename does not correctly handle slashes on the source argument, such as on Solaris 9 or cygwin 1.5.]) fi - AC_CACHE_CHECK([whether rename is broken when the destination exists], - [gl_cv_func_rename_dest_exists_bug], - [case "$host_os" in - mingw*) gl_cv_func_rename_dest_exists_bug=yes ;; - *) gl_cv_func_rename_dest_exists_bug=no ;; - esac + 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" = "$4"; then + AC_RUN_IFELSE( + [AC_LANG_PROGRAM([[ +# include +# include +# include + ]], + [[int result = 0; + if (rename ("conftest.f", "conftest.f1")) + result |= 1; + if (unlink ("conftest.f1")) + result |= 2; + if (rename ("conftest.f", "conftest.f")) + result |= 4; + if (rename ("conftest.f1", "conftest.f1") == 0) + result |= 8; + return result; + ]])], + [gl_cv_func_rename_link_works=yes], + [gl_cv_func_rename_link_works=no], + dnl When crosscompiling, assume rename is broken. + [gl_cv_func_rename_link_works="guessing no"]) + else + gl_cv_func_rename_link_works="guessing no" + fi + rm -rf conftest.f conftest.f1 + ]) + if test "x$gl_cv_func_rename_link_works" != xyes; then + 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 symlinks with a trailing slash. + AC_CACHE_CHECK([whether rename manages existing destinations correctly], + [gl_cv_func_rename_dest_works], + [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 +# include + ]], + [[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"]) + rm -rf conftest.f conftest.d1 conftest.d2 ]) - if test $gl_cv_func_rename_dest_exists_bug = yes; then - AC_LIBOBJ([rename]) + if test "x$gl_cv_func_rename_dest_works" != xyes; then 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 ])