# acl.m4 - check for access control list (ACL) primitives # serial 22 # Copyright (C) 2002, 2004-2016 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([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 . 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, macOS, dnl IRIX, Tru64). -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 . 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 #include 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 macOS, 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 #include 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 ]) 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 test $gl_need_lib_has_acl && LIB_HAS_ACL=$LIB_ACL 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 #include #include ]], [[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], [$2]) ]) # On GNU/Linux, testing if a file has an acl can be done with the getxattr # syscall which doesn't require linking against additional libraries. AC_DEFUN([gl_FILE_HAS_ACL], [ AC_REQUIRE([gl_FUNC_ACL_ARG]) if test "$enable_acl" != no; then AC_CACHE_CHECK([for getxattr with XATTR_NAME_POSIX_ACL macros], [gl_cv_getxattr_with_posix_acls], [gl_cv_getxattr_with_posix_acls=no AC_LINK_IFELSE( [AC_LANG_PROGRAM( [[#include #include #include ]], [[ssize_t a = getxattr (".", XATTR_NAME_POSIX_ACL_ACCESS, 0, 0); ssize_t b = getxattr (".", XATTR_NAME_POSIX_ACL_DEFAULT, 0, 0); return a < 0 || b < 0; ]])], [gl_cv_getxattr_with_posix_acls=yes])]) fi if test "$gl_cv_getxattr_with_posix_acls" = yes; then LIB_HAS_ACL= AC_DEFINE([GETXATTR_WITH_POSIX_ACLS], 1, [Define to 1 if getxattr works with XATTR_NAME_POSIX_ACL_ACCESS and XATTR_NAME_POSIX_ACL_DEFAULT.]) else dnl Set gl_need_lib_has_acl to a nonempty value, so that any dnl later gl_FUNC_ACL call will set LIB_HAS_ACL=$LIB_ACL. gl_need_lib_has_acl=1 LIB_HAS_ACL=$LIB_ACL fi AC_SUBST([LIB_HAS_ACL]) ])