X-Git-Url: https://git.cworth.org/git?p=tar;a=blobdiff_plain;f=m4%2Frename.m4;fp=m4%2Frename.m4;h=30daf0e44bf6bf4611d1e3a0e916b6ff6fcd0e66;hp=0000000000000000000000000000000000000000;hb=de7372b23c3da92fbfaea2d1ac592f0b2ba87914;hpb=fbbfb9406a82e647ce27b6462b11a802fa48f31a diff --git a/m4/rename.m4 b/m4/rename.m4 new file mode 100644 index 0000000..30daf0e --- /dev/null +++ b/m4/rename.m4 @@ -0,0 +1,158 @@ +# serial 22 + +# Copyright (C) 2001, 2003, 2005-2006, 2009-2010 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. + +dnl From Volker Borchert. +dnl Determine whether rename works for source file names with a trailing slash. +dnl The rename from SunOS 4.1.1_U1 doesn't. +dnl +dnl If it doesn't, then define RENAME_TRAILING_SLASH_BUG and arrange +dnl to compile the wrapper function. +dnl + +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.d1 conftest.d2 conftest.lnk + touch conftest.f && mkdir conftest.d1 || + AC_MSG_ERROR([cannot create temporary files]) + # Assume that if we have lstat, we can also check symlinks. + if test $ac_cv_func_lstat = yes; then + ln -s conftest.f conftest.lnk + fi + AC_RUN_IFELSE([AC_LANG_PROGRAM([[ +# include +# include +]], [if (rename ("conftest.f", "conftest.f1/") == 0) return 1; + if (rename ("conftest.d1", "conftest.d2/") != 0) return 2; +#if HAVE_LSTAT + if (rename ("conftest.f", "conftest.lnk/") == 0) return 3; +#endif + ])], + [gl_cv_func_rename_slash_dst_works=yes], + [gl_cv_func_rename_slash_dst_works=no], + dnl When crosscompiling, assume rename is broken. + [gl_cv_func_rename_slash_dst_works="guessing no"]) + rm -rf conftest.f conftest.f1 conftest.d1 conftest.d2 conftest.lnk + ]) + if test "x$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 + 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 conftest.lnk + touch conftest.f && mkdir conftest.d1 || + AC_MSG_ERROR([cannot create temporary files]) + # Assume that if we have lstat, we can also check symlinks. + if test $ac_cv_func_lstat = yes; then + ln -s conftest.f conftest.lnk + fi + AC_RUN_IFELSE([AC_LANG_PROGRAM([[ +# include +# include +]], [if (rename ("conftest.f/", "conftest.d2") == 0) return 1; + if (rename ("conftest.d1/", "conftest.d2") != 0) return 2; +#if HAVE_LSTAT + if (rename ("conftest.lnk/", "conftest.f") == 0) return 3; +#endif + ])], + [gl_cv_func_rename_slash_src_works=yes], + [gl_cv_func_rename_slash_src_works=no], + dnl When crosscompiling, assume rename is broken. + [gl_cv_func_rename_slash_src_works="guessing no"]) + rm -rf conftest.f conftest.d1 conftest.d2 conftest.lnk + ]) + if test "x$gl_cv_func_rename_slash_src_works" != xyes; then + AC_LIBOBJ([rename]) + REPLACE_RENAME=1 + AC_DEFINE([RENAME_TRAILING_SLASH_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 + + 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" = "$4"; then + AC_RUN_IFELSE([AC_LANG_PROGRAM([[ +# include +# include +# include +]], [if (rename ("conftest.f", "conftest.f1")) return 1; + if (unlink ("conftest.f1")) return 2; + if (rename ("conftest.f", "conftest.f")) return 3; + if (rename ("conftest.f1", "conftest.f1") == 0) return 4;])], + [gl_cv_func_rename_link_works=yes], + [gl_cv_func_rename_link_works=no], + dnl When crosscompiling, assume rename is broken. + [gl_cv_func_rename_link_works="guessing no"]) + else + gl_cv_func_rename_link_works="guessing no" + fi + rm -rf conftest.f conftest.f1 + ]) + if test "x$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 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 +]], [if (rename ("conftest.d1", "conftest.d2") != 0) return 1; + if (rename ("conftest.d2", "conftest.f") == 0) return 2;])], + [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 "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 Cygwin 1.5 or Windows.]) + fi +])