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# acl.m4 - check for access control list (ACL) primitives
# serial 29
# Copyright (C) 2002, 2004-2023 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.
# Written by Paul Eggert and Jim Meyering.
AC_DEFUN([gl_FUNC_ACL_ARG],
[
gl_need_lib_has_acl=
AC_ARG_ENABLE([acl],
AS_HELP_STRING([[--disable-acl]], [do not support ACLs]),
, [enable_acl=auto])
])
AC_DEFUN_ONCE([gl_FUNC_ACL],
[
AC_REQUIRE([gl_FUNC_ACL_ARG])
AC_CHECK_FUNCS_ONCE([fchmod])
LIB_ACL=
use_acl=0
if test "$enable_acl" != no; then
dnl On all platforms, the ACL related API is declared in <sys/acl.h>.
AC_CHECK_HEADERS([sys/acl.h])
if test $ac_cv_header_sys_acl_h = yes; then
ac_save_LIBS=$LIBS
dnl Test for POSIX-draft-like API (GNU/Linux, FreeBSD, Mac OS X,
dnl IRIX, Tru64, Cygwin >= 2.5).
dnl -lacl is needed on GNU/Linux, -lpacl on OSF/1.
if test $use_acl = 0; then
AC_SEARCH_LIBS([acl_get_file], [acl pacl],
[if test "$ac_cv_search_acl_get_file" != "none required"; then
LIB_ACL=$ac_cv_search_acl_get_file
fi
AC_CHECK_FUNCS(
[acl_get_file acl_get_fd acl_set_file acl_set_fd \
acl_free acl_from_mode acl_from_text \
acl_delete_def_file acl_extended_file \
acl_delete_fd_np acl_delete_file_np \
acl_copy_ext_native acl_create_entry_np \
acl_to_short_text acl_free_text])
# If the acl_get_file bug is detected, don't enable the ACL support.
gl_ACL_GET_FILE([use_acl=1], [])
if test $use_acl = 1; then
dnl On GNU/Linux, an additional API is declared in <acl/libacl.h>.
AC_CHECK_HEADERS([acl/libacl.h])
AC_REPLACE_FUNCS([acl_entries])
AC_CACHE_CHECK([for ACL_FIRST_ENTRY],
[gl_cv_acl_ACL_FIRST_ENTRY],
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[#include <sys/types.h>
#include <sys/acl.h>
int type = ACL_FIRST_ENTRY;]])],
[gl_cv_acl_ACL_FIRST_ENTRY=yes],
[gl_cv_acl_ACL_FIRST_ENTRY=no])])
if test $gl_cv_acl_ACL_FIRST_ENTRY = yes; then
AC_DEFINE([HAVE_ACL_FIRST_ENTRY], [1],
[Define to 1 if the constant ACL_FIRST_ENTRY exists.])
fi
dnl On Mac OS X, other types of ACLs are supported.
AC_CACHE_CHECK([for ACL_TYPE_EXTENDED],
[gl_cv_acl_ACL_TYPE_EXTENDED],
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[#include <sys/types.h>
#include <sys/acl.h>
int type = ACL_TYPE_EXTENDED;]])],
[gl_cv_acl_ACL_TYPE_EXTENDED=yes],
[gl_cv_acl_ACL_TYPE_EXTENDED=no])])
if test $gl_cv_acl_ACL_TYPE_EXTENDED = yes; then
AC_DEFINE([HAVE_ACL_TYPE_EXTENDED], [1],
[Define to 1 if the ACL type ACL_TYPE_EXTENDED exists.])
fi
else
LIB_ACL=
fi
])
fi
dnl Test for Solaris API (Solaris, Cygwin).
if test $use_acl = 0; then
AC_CHECK_FUNCS([facl])
if test $ac_cv_func_facl = yes; then
AC_SEARCH_LIBS([acl_trivial], [sec],
[if test "$ac_cv_search_acl_trivial" != "none required"; then
LIB_ACL=$ac_cv_search_acl_trivial
fi
])
AC_CHECK_FUNCS([acl_trivial])
use_acl=1
fi
fi
dnl Test for HP-UX API.
if test $use_acl = 0; then
AC_CHECK_FUNCS([getacl])
if test $ac_cv_func_getacl = yes; then
use_acl=1
fi
dnl Test for HP-UX 11.11 API.
AC_CHECK_HEADERS([aclv.h], [], [], [#include <sys/types.h>])
fi
dnl Test for AIX API (AIX 5.3 or newer).
if test $use_acl = 0; then
AC_CHECK_FUNCS([aclx_get])
if test $ac_cv_func_aclx_get = yes; then
use_acl=1
fi
fi
dnl Test for older AIX API.
if test $use_acl = 0 || test "$ac_cv_func_aclx_get" = yes; then
AC_CHECK_FUNCS([statacl])
if test $ac_cv_func_statacl = yes; then
use_acl=1
fi
fi
dnl Test for NonStop Kernel API.
if test $use_acl = 0; then
AC_CHECK_FUNCS([aclsort])
if test $ac_cv_func_aclsort = yes; then
use_acl=1
fi
fi
LIBS=$ac_save_LIBS
fi
if test "$enable_acl$use_acl" = yes0; then
AC_MSG_ERROR([ACLs enabled but support not detected])
elif test "$enable_acl$use_acl" = auto0; then
AC_MSG_WARN([libacl development library was not found or not usable.])
AC_MSG_WARN([AC_PACKAGE_NAME will be built without ACL support.])
fi
fi
if test -n "$gl_need_lib_has_acl"; then
FILE_HAS_ACL_LIB=$LIB_ACL
fi
AC_SUBST([LIB_ACL])
AC_DEFINE_UNQUOTED([USE_ACL], [$use_acl],
[Define to nonzero if you want access control list support.])
USE_ACL=$use_acl
AC_SUBST([USE_ACL])
])
# gl_ACL_GET_FILE(IF-WORKS, IF-NOT)
# ---------------------------------
# If 'acl_get_file' works (does not have a particular bug),
# run IF-WORKS, otherwise, IF-NOT.
# When building natively, test for a Darwin 8.7.0 bug, whereby acl_get_file
# returns NULL, but sets errno = ENOENT for an existing file or directory.
# When cross-compiling, assume that this old bug no longer applies.
AC_DEFUN([gl_ACL_GET_FILE],
[
AC_CACHE_CHECK([for working acl_get_file], [gl_cv_func_working_acl_get_file],
[gl_cv_func_working_acl_get_file=no
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[#include <sys/types.h>
#include <sys/acl.h>
#include <errno.h>
]],
[[acl_t acl = acl_get_file (".", ACL_TYPE_ACCESS);
return acl ? acl_free (acl) != 0 : errno == ENOENT;
]])],
[if test $cross_compiling = yes; then
gl_cv_func_working_acl_get_file="guessing yes"
elif ./conftest$ac_exeext; then
gl_cv_func_working_acl_get_file=yes
fi])])
AS_IF([test "$gl_cv_func_working_acl_get_file" != no], [$1], [$2])
])
# On GNU/Linux, testing if a file has an acl can be done with the
# listxattr and getxattr syscalls, which don't require linking
# against additional libraries. Assume this works if linux/attr.h
# and listxattr are present.
AC_DEFUN([gl_FILE_HAS_ACL],
[
AC_REQUIRE([gl_FUNC_ACL_ARG])
AC_CHECK_HEADERS_ONCE([linux/xattr.h])
AC_CHECK_FUNCS_ONCE([listxattr])
FILE_HAS_ACL_LIB=
AS_CASE([$enable_acl,$ac_cv_header_linux_xattr_h,$ac_cv_func_listxattr],
[no,*,*], [],
[*,yes,yes], [],
[*],
[dnl Set gl_need_lib_has_acl to a nonempty value, so that any
dnl later gl_FUNC_ACL call will set FILE_HAS_ACL_LIB=$LIB_ACL.
gl_need_lib_has_acl=1
FILE_HAS_ACL_LIB=$LIB_ACL])
AC_SUBST([FILE_HAS_ACL_LIB])
])
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