m4/acl.m4

   1 # acl.m4 - check for access control list (ACL) primitives
   2 # serial 16
   3
   4 # Copyright (C) 2002, 2004-2013 Free Software Foundation, Inc.
   5 # This file is free software; the Free Software Foundation
   6 # gives unlimited permission to copy and/or distribute it,
   7 # with or without modifications, as long as this notice is preserved.
   8
   9 # Written by Paul Eggert and Jim Meyering.
  10
  11 AC_DEFUN([gl_FUNC_ACL],
  12 [
  13   AC_ARG_ENABLE([acl],
  14     AS_HELP_STRING([--disable-acl], [do not support ACLs]),
  15     , [enable_acl=auto])
  16
  17   LIB_ACL=
  18   use_acl=0
  19   if test "x$enable_acl" != "xno"; then
  20     dnl On all platforms, the ACL related API is declared in <sys/acl.h>.
  21     AC_CHECK_HEADERS([sys/acl.h])
  22     if test $ac_cv_header_sys_acl_h = yes; then
  23       ac_save_LIBS=$LIBS
  24
  25       dnl Test for POSIX-draft-like API (Linux, FreeBSD, Mac OS X, IRIX, Tru64).
  26       dnl -lacl is needed on Linux, -lpacl is needed on OSF/1.
  27       if test $use_acl = 0; then
  28         AC_SEARCH_LIBS([acl_get_file], [acl pacl],
  29           [if test "$ac_cv_search_acl_get_file" != "none required"; then
  30              LIB_ACL=$ac_cv_search_acl_get_file
  31            fi
  32            AC_CHECK_FUNCS(
  33              [acl_get_file acl_get_fd acl_set_file acl_set_fd \
  34               acl_free acl_from_mode acl_from_text \
  35               acl_delete_def_file acl_extended_file \
  36               acl_delete_fd_np acl_delete_file_np \
  37               acl_copy_ext_native acl_create_entry_np \
  38               acl_to_short_text acl_free_text])
  39            # If the acl_get_file bug is detected, don't enable the ACL support.
  40            gl_ACL_GET_FILE([use_acl=1], [])
  41            if test $use_acl = 1; then
  42              dnl On Linux, additional API is declared in <acl/libacl.h>.
  43              AC_CHECK_HEADERS([acl/libacl.h])
  44              AC_REPLACE_FUNCS([acl_entries])
  45              AC_CACHE_CHECK([for ACL_FIRST_ENTRY],
  46                [gl_cv_acl_ACL_FIRST_ENTRY],
  47                [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
  48 [[#include <sys/types.h>
  49 #include <sys/acl.h>
  50 int type = ACL_FIRST_ENTRY;]])],
  51                   [gl_cv_acl_ACL_FIRST_ENTRY=yes],
  52                   [gl_cv_acl_ACL_FIRST_ENTRY=no])])
  53              if test $gl_cv_acl_ACL_FIRST_ENTRY = yes; then
  54                AC_DEFINE([HAVE_ACL_FIRST_ENTRY], [1],
  55                  [Define to 1 if the constant ACL_FIRST_ENTRY exists.])
  56              fi
  57              dnl On Mac OS X, other types of ACLs are supported.
  58              AC_CACHE_CHECK([for ACL_TYPE_EXTENDED],
  59                [gl_cv_acl_ACL_TYPE_EXTENDED],
  60                [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
  61 [[#include <sys/types.h>
  62 #include <sys/acl.h>
  63 int type = ACL_TYPE_EXTENDED;]])],
  64                   [gl_cv_acl_ACL_TYPE_EXTENDED=yes],
  65                   [gl_cv_acl_ACL_TYPE_EXTENDED=no])])
  66              if test $gl_cv_acl_ACL_TYPE_EXTENDED = yes; then
  67                AC_DEFINE([HAVE_ACL_TYPE_EXTENDED], [1],
  68                  [Define to 1 if the ACL type ACL_TYPE_EXTENDED exists.])
  69              fi
  70            else
  71              LIB_ACL=
  72            fi
  73           ])
  74       fi
  75
  76       dnl Test for Solaris API (Solaris, Cygwin).
  77       if test $use_acl = 0; then
  78         AC_CHECK_FUNCS([facl])
  79         if test $ac_cv_func_facl = yes; then
  80           AC_SEARCH_LIBS([acl_trivial], [sec],
  81             [if test "$ac_cv_search_acl_trivial" != "none required"; then
  82                LIB_ACL=$ac_cv_search_acl_trivial
  83              fi
  84             ])
  85           AC_CHECK_FUNCS([acl_trivial])
  86           use_acl=1
  87         fi
  88       fi
  89
  90       dnl Test for HP-UX API.
  91       if test $use_acl = 0; then
  92         AC_CHECK_FUNCS([getacl])
  93         if test $ac_cv_func_getacl = yes; then
  94           use_acl=1
  95         fi
  96         dnl Test for HP-UX 11.11 API.
  97         AC_CHECK_HEADERS([aclv.h], [], [], [#include <sys/types.h>])
  98       fi
  99
 100       dnl Test for AIX API (AIX 5.3 or newer).
 101       if test $use_acl = 0; then
 102         AC_CHECK_FUNCS([aclx_get])
 103         if test $ac_cv_func_aclx_get = yes; then
 104           use_acl=1
 105         fi
 106       fi
 107
 108       dnl Test for older AIX API.
 109       if test $use_acl = 0 || test "$ac_cv_func_aclx_get" = yes; then
 110         AC_CHECK_FUNCS([statacl])
 111         if test $ac_cv_func_statacl = yes; then
 112           use_acl=1
 113         fi
 114       fi
 115
 116       dnl Test for NonStop Kernel API.
 117       if test $use_acl = 0; then
 118         AC_CHECK_FUNCS([aclsort])
 119         if test $ac_cv_func_aclsort = yes; then
 120           use_acl=1
 121         fi
 122       fi
 123
 124       LIBS=$ac_save_LIBS
 125     fi
 126     if test "x$enable_acl$use_acl" = "xyes0"; then
 127       AC_MSG_ERROR([ACLs enabled but support not detected])
 128     elif test "x$enable_acl$use_acl" = "xauto0"; then
 129       AC_MSG_WARN([libacl development library was not found or not usable.])
 130       AC_MSG_WARN([AC_PACKAGE_NAME will be built without ACL support.])
 131     fi
 132   fi
 133   AC_SUBST([LIB_ACL])
 134   AC_DEFINE_UNQUOTED([USE_ACL], [$use_acl],
 135     [Define to nonzero if you want access control list support.])
 136   USE_ACL=$use_acl
 137   AC_SUBST([USE_ACL])
 138 ])
 139
 140 # gl_ACL_GET_FILE(IF-WORKS, IF-NOT)
 141 # -------------------------------------
 142 # If 'acl_get_file' works (does not have a particular bug),
 143 # run IF-WORKS, otherwise, IF-NOT.
 144 # When building natively, test for a Darwin 8.7.0 bug, whereby acl_get_file
 145 # returns NULL, but sets errno = ENOENT for an existing file or directory.
 146 # When cross-compiling, assume that this old bug no longer applies.
 147 AC_DEFUN([gl_ACL_GET_FILE],
 148 [
 149   AC_CACHE_CHECK([for working acl_get_file], [gl_cv_func_working_acl_get_file],
 150     [gl_cv_func_working_acl_get_file=no
 151      AC_LINK_IFELSE(
 152        [AC_LANG_PROGRAM(
 153           [[#include <sys/types.h>
 154            #include <sys/acl.h>
 155            #include <errno.h>
 156           ]],
 157           [[if (!acl_get_file (".", ACL_TYPE_ACCESS) && errno == ENOENT)
 158               return 1;
 159             return 0;
 160           ]])],
 161        [if test $cross_compiling = yes; then
 162           gl_cv_func_working_acl_get_file="guessing yes"
 163         elif ./conftest$ac_exeext; then
 164           gl_cv_func_working_acl_get_file=yes
 165         fi])])
 166   AS_IF([test "$gl_cv_func_working_acl_get_file" != no], [$1], [$2])
 167 ])