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| author | Ondrej Valousek <ondrej.valousek.xm@renesas.com> | 2023-01-04 15:34:26 +0100 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2023-01-12 21:38:43 +0100 |
| commit | eb6a8a4dfbe89f9f74666df082255cfefa10a407 (patch) | |
| tree | f59c818d20b4145d00193c479cd56bb01225e8cc /m4/xattr.m4 | |
| parent | 2886cca8398f4c5a4d68368a19c0e6d0ff97c739 (diff) | |
| download | gnulib-eb6a8a4dfbe89f9f74666df082255cfefa10a407.tar.gz | |
qcopy-acl: Optimize copying of ACLs by directly copying the attributes.
* lib/qcopy-acl.c (is_attr_permissions): New functions.
(qcopy_acl): If USE_XATTR, copy the ACL related attributes directly.
* m4/xattr.m4: New file.
* modules/qcopy-acl (Files): Add it.
(configure.ac): Invoke gl_FUNC_XATTR.
Diffstat (limited to 'm4/xattr.m4')
| -rw-r--r-- | m4/xattr.m4 | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/m4/xattr.m4 b/m4/xattr.m4 new file mode 100644 index 0000000000..6efdfa475a --- /dev/null +++ b/m4/xattr.m4 @@ -0,0 +1,42 @@ +# xattr.m4 - check for Extended Attributes (Linux) +# serial 4 + +# Copyright (C) 2003-2021 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. + +AC_DEFUN([gl_FUNC_XATTR], +[ + AC_ARG_ENABLE([xattr], + AS_HELP_STRING([--disable-xattr], + [do not support extended attributes]), + [use_xattr=$enableval], [use_xattr=yes]) + + LIB_XATTR= + AC_SUBST([LIB_XATTR]) + + if test "$use_xattr" = "yes"; then + AC_CHECK_HEADERS([attr/error_context.h attr/libattr.h]) + use_xattr=no + if test "$ac_cv_header_attr_libattr_h" = yes \ + && test "$ac_cv_header_attr_error_context_h" = yes; then + xattr_saved_LIBS=$LIBS + AC_SEARCH_LIBS([attr_copy_file], [attr], + [test "$ac_cv_search_attr_copy_file" = "none required" || + LIB_XATTR="$ac_cv_search_attr_copy_file"]) + AC_CHECK_FUNCS([attr_copy_file]) + LIBS=$xattr_saved_LIBS + if test "$ac_cv_func_attr_copy_file" = yes; then + use_xattr=yes + fi + fi + if test $use_xattr = no; then + AC_MSG_WARN([libattr development library was not found or not usable.]) + AC_MSG_WARN([AC_PACKAGE_NAME will be built without xattr support.]) + fi + fi + if test $use_xattr = yes; then + AC_DEFINE_UNQUOTED([USE_XATTR], 1) + fi +]) |