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212 lines
7.3 KiB
Plaintext
212 lines
7.3 KiB
Plaintext
# acl.m4 - check for access control list (ACL) primitives
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# serial 23
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# Copyright (C) 2002, 2004-2019 Free Software Foundation, Inc.
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# This file is free software; the Free Software Foundation
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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# Written by Paul Eggert and Jim Meyering.
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AC_DEFUN([gl_FUNC_ACL_ARG],
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[
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gl_need_lib_has_acl=
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AC_ARG_ENABLE([acl],
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AS_HELP_STRING([--disable-acl], [do not support ACLs]),
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, [enable_acl=auto])
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])
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AC_DEFUN([gl_FUNC_ACL],
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[
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AC_REQUIRE([gl_FUNC_ACL_ARG])
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AC_CHECK_FUNCS_ONCE([fchmod])
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LIB_ACL=
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use_acl=0
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if test "$enable_acl" != no; then
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dnl On all platforms, the ACL related API is declared in <sys/acl.h>.
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AC_CHECK_HEADERS([sys/acl.h])
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if test $ac_cv_header_sys_acl_h = yes; then
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ac_save_LIBS=$LIBS
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dnl Test for POSIX-draft-like API (GNU/Linux, FreeBSD, Mac OS X,
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dnl IRIX, Tru64, Cygwin >= 2.5).
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dnl -lacl is needed on GNU/Linux, -lpacl on OSF/1.
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if test $use_acl = 0; then
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AC_SEARCH_LIBS([acl_get_file], [acl pacl],
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[if test "$ac_cv_search_acl_get_file" != "none required"; then
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LIB_ACL=$ac_cv_search_acl_get_file
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fi
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AC_CHECK_FUNCS(
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[acl_get_file acl_get_fd acl_set_file acl_set_fd \
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acl_free acl_from_mode acl_from_text \
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acl_delete_def_file acl_extended_file \
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acl_delete_fd_np acl_delete_file_np \
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acl_copy_ext_native acl_create_entry_np \
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acl_to_short_text acl_free_text])
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# If the acl_get_file bug is detected, don't enable the ACL support.
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gl_ACL_GET_FILE([use_acl=1], [])
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if test $use_acl = 1; then
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dnl On GNU/Linux, an additional API is declared in <acl/libacl.h>.
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AC_CHECK_HEADERS([acl/libacl.h])
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AC_REPLACE_FUNCS([acl_entries])
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AC_CACHE_CHECK([for ACL_FIRST_ENTRY],
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[gl_cv_acl_ACL_FIRST_ENTRY],
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[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
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[[#include <sys/types.h>
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#include <sys/acl.h>
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int type = ACL_FIRST_ENTRY;]])],
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[gl_cv_acl_ACL_FIRST_ENTRY=yes],
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[gl_cv_acl_ACL_FIRST_ENTRY=no])])
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if test $gl_cv_acl_ACL_FIRST_ENTRY = yes; then
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AC_DEFINE([HAVE_ACL_FIRST_ENTRY], [1],
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[Define to 1 if the constant ACL_FIRST_ENTRY exists.])
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fi
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dnl On Mac OS X, other types of ACLs are supported.
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AC_CACHE_CHECK([for ACL_TYPE_EXTENDED],
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[gl_cv_acl_ACL_TYPE_EXTENDED],
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[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
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[[#include <sys/types.h>
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#include <sys/acl.h>
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int type = ACL_TYPE_EXTENDED;]])],
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[gl_cv_acl_ACL_TYPE_EXTENDED=yes],
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[gl_cv_acl_ACL_TYPE_EXTENDED=no])])
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if test $gl_cv_acl_ACL_TYPE_EXTENDED = yes; then
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AC_DEFINE([HAVE_ACL_TYPE_EXTENDED], [1],
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[Define to 1 if the ACL type ACL_TYPE_EXTENDED exists.])
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fi
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else
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LIB_ACL=
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fi
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])
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fi
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dnl Test for Solaris API (Solaris, Cygwin).
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if test $use_acl = 0; then
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AC_CHECK_FUNCS([facl])
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if test $ac_cv_func_facl = yes; then
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AC_SEARCH_LIBS([acl_trivial], [sec],
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[if test "$ac_cv_search_acl_trivial" != "none required"; then
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LIB_ACL=$ac_cv_search_acl_trivial
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fi
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])
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AC_CHECK_FUNCS([acl_trivial])
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use_acl=1
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fi
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fi
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dnl Test for HP-UX API.
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if test $use_acl = 0; then
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AC_CHECK_FUNCS([getacl])
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if test $ac_cv_func_getacl = yes; then
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use_acl=1
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fi
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dnl Test for HP-UX 11.11 API.
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AC_CHECK_HEADERS([aclv.h], [], [], [#include <sys/types.h>])
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fi
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dnl Test for AIX API (AIX 5.3 or newer).
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if test $use_acl = 0; then
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AC_CHECK_FUNCS([aclx_get])
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if test $ac_cv_func_aclx_get = yes; then
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use_acl=1
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fi
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fi
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dnl Test for older AIX API.
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if test $use_acl = 0 || test "$ac_cv_func_aclx_get" = yes; then
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AC_CHECK_FUNCS([statacl])
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if test $ac_cv_func_statacl = yes; then
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use_acl=1
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fi
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fi
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dnl Test for NonStop Kernel API.
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if test $use_acl = 0; then
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AC_CHECK_FUNCS([aclsort])
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if test $ac_cv_func_aclsort = yes; then
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use_acl=1
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fi
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fi
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LIBS=$ac_save_LIBS
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fi
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if test "$enable_acl$use_acl" = yes0; then
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AC_MSG_ERROR([ACLs enabled but support not detected])
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elif test "$enable_acl$use_acl" = auto0; then
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AC_MSG_WARN([libacl development library was not found or not usable.])
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AC_MSG_WARN([AC_PACKAGE_NAME will be built without ACL support.])
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fi
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fi
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test $gl_need_lib_has_acl && LIB_HAS_ACL=$LIB_ACL
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AC_SUBST([LIB_ACL])
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AC_DEFINE_UNQUOTED([USE_ACL], [$use_acl],
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[Define to nonzero if you want access control list support.])
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USE_ACL=$use_acl
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AC_SUBST([USE_ACL])
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])
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# gl_ACL_GET_FILE(IF-WORKS, IF-NOT)
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# ---------------------------------
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# If 'acl_get_file' works (does not have a particular bug),
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# run IF-WORKS, otherwise, IF-NOT.
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# When building natively, test for a Darwin 8.7.0 bug, whereby acl_get_file
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# returns NULL, but sets errno = ENOENT for an existing file or directory.
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# When cross-compiling, assume that this old bug no longer applies.
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AC_DEFUN([gl_ACL_GET_FILE],
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[
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AC_CACHE_CHECK([for working acl_get_file], [gl_cv_func_working_acl_get_file],
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[gl_cv_func_working_acl_get_file=no
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[[#include <sys/types.h>
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#include <sys/acl.h>
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#include <errno.h>
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]],
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[[acl_t acl = acl_get_file (".", ACL_TYPE_ACCESS);
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return acl ? acl_free (acl) != 0 : errno == ENOENT;
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]])],
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[if test $cross_compiling = yes; then
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gl_cv_func_working_acl_get_file="guessing yes"
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elif ./conftest$ac_exeext; then
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gl_cv_func_working_acl_get_file=yes
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fi])])
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AS_IF([test "$gl_cv_func_working_acl_get_file" != no], [$1], [$2])
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])
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# On GNU/Linux, testing if a file has an acl can be done with the getxattr
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# syscall which doesn't require linking against additional libraries.
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AC_DEFUN([gl_FILE_HAS_ACL],
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[
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AC_REQUIRE([gl_FUNC_ACL_ARG])
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if test "$enable_acl" != no; then
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AC_CACHE_CHECK([for getxattr with XATTR_NAME_POSIX_ACL macros],
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[gl_cv_getxattr_with_posix_acls],
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[gl_cv_getxattr_with_posix_acls=no
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[[#include <sys/types.h>
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#include <sys/xattr.h>
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#include <linux/xattr.h>
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]],
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[[ssize_t a = getxattr (".", XATTR_NAME_POSIX_ACL_ACCESS, 0, 0);
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ssize_t b = getxattr (".", XATTR_NAME_POSIX_ACL_DEFAULT, 0, 0);
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return a < 0 || b < 0;
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]])],
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[gl_cv_getxattr_with_posix_acls=yes])])
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fi
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if test "$gl_cv_getxattr_with_posix_acls" = yes; then
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LIB_HAS_ACL=
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AC_DEFINE([GETXATTR_WITH_POSIX_ACLS], 1,
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[Define to 1 if getxattr works with XATTR_NAME_POSIX_ACL_ACCESS
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and XATTR_NAME_POSIX_ACL_DEFAULT.])
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else
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dnl Set gl_need_lib_has_acl to a nonempty value, so that any
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dnl later gl_FUNC_ACL call will set LIB_HAS_ACL=$LIB_ACL.
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gl_need_lib_has_acl=1
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LIB_HAS_ACL=$LIB_ACL
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fi
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AC_SUBST([LIB_HAS_ACL])
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])
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