m4/acl.m4

   1 # acl.m4 - check for access control list (ACL) primitives
   2 # serial 17
   3
   4 # Copyright (C) 2002, 2004-2014 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   AC_CHECK_FUNCS_ONCE([fchmod])
  18   LIB_ACL=
  19   use_acl=0
  20   if test "x$enable_acl" != "xno"; then
  21     dnl On all platforms, the ACL related API is declared in <sys/acl.h>.
  22     AC_CHECK_HEADERS([sys/acl.h])
  23     if test $ac_cv_header_sys_acl_h = yes; then
  24       ac_save_LIBS=$LIBS
  25
  26       dnl Test for POSIX-draft-like API (Linux, FreeBSD, Mac OS X, IRIX, Tru64).
  27       dnl -lacl is needed on Linux, -lpacl is needed on OSF/1.
  28       if test $use_acl = 0; then
  29         AC_SEARCH_LIBS([acl_get_file], [acl pacl],
  30           [if test "$ac_cv_search_acl_get_file" != "none required"; then
  31              LIB_ACL=$ac_cv_search_acl_get_file
  32            fi
  33            AC_CHECK_FUNCS(
  34              [acl_get_file acl_get_fd acl_set_file acl_set_fd \
  35               acl_free acl_from_mode acl_from_text \
  36               acl_delete_def_file acl_extended_file \
  37               acl_delete_fd_np acl_delete_file_np \
  38               acl_copy_ext_native acl_create_entry_np \
  39               acl_to_short_text acl_free_text])
  40            # If the acl_get_file bug is detected, don't enable the ACL support.
  41            gl_ACL_GET_FILE([use_acl=1], [])
  42            if test $use_acl = 1; then
  43              dnl On Linux, additional API is declared in <acl/libacl.h>.
  44              AC_CHECK_HEADERS([acl/libacl.h])
  45              AC_REPLACE_FUNCS([acl_entries])
  46              AC_CACHE_CHECK([for ACL_FIRST_ENTRY],
  47                [gl_cv_acl_ACL_FIRST_ENTRY],
  48                [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
  49 [[#include <sys/types.h>
  50 #include <sys/acl.h>
  51 int type = ACL_FIRST_ENTRY;]])],
  52                   [gl_cv_acl_ACL_FIRST_ENTRY=yes],
  53                   [gl_cv_acl_ACL_FIRST_ENTRY=no])])
  54              if test $gl_cv_acl_ACL_FIRST_ENTRY = yes; then
  55                AC_DEFINE([HAVE_ACL_FIRST_ENTRY], [1],
  56                  [Define to 1 if the constant ACL_FIRST_ENTRY exists.])
  57              fi
  58              dnl On Mac OS X, other types of ACLs are supported.
  59              AC_CACHE_CHECK([for ACL_TYPE_EXTENDED],
  60                [gl_cv_acl_ACL_TYPE_EXTENDED],
  61                [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
  62 [[#include <sys/types.h>
  63 #include <sys/acl.h>
  64 int type = ACL_TYPE_EXTENDED;]])],
  65                   [gl_cv_acl_ACL_TYPE_EXTENDED=yes],
  66                   [gl_cv_acl_ACL_TYPE_EXTENDED=no])])
  67              if test $gl_cv_acl_ACL_TYPE_EXTENDED = yes; then
  68                AC_DEFINE([HAVE_ACL_TYPE_EXTENDED], [1],
  69                  [Define to 1 if the ACL type ACL_TYPE_EXTENDED exists.])
  70              fi
  71            else
  72              LIB_ACL=
  73            fi
  74           ])
  75       fi
  76
  77       dnl Test for Solaris API (Solaris, Cygwin).
  78       if test $use_acl = 0; then
  79         AC_CHECK_FUNCS([facl])
  80         if test $ac_cv_func_facl = yes; then
  81           AC_SEARCH_LIBS([acl_trivial], [sec],
  82             [if test "$ac_cv_search_acl_trivial" != "none required"; then
  83                LIB_ACL=$ac_cv_search_acl_trivial
  84              fi
  85             ])
  86           AC_CHECK_FUNCS([acl_trivial])
  87           use_acl=1
  88         fi
  89       fi
  90
  91       dnl Test for HP-UX API.
  92       if test $use_acl = 0; then
  93         AC_CHECK_FUNCS([getacl])
  94         if test $ac_cv_func_getacl = yes; then
  95           use_acl=1
  96         fi
  97         dnl Test for HP-UX 11.11 API.
  98         AC_CHECK_HEADERS([aclv.h], [], [], [#include <sys/types.h>])
  99       fi
 100
 101       dnl Test for AIX API (AIX 5.3 or newer).
 102       if test $use_acl = 0; then
 103         AC_CHECK_FUNCS([aclx_get])
 104         if test $ac_cv_func_aclx_get = yes; then
 105           use_acl=1
 106         fi
 107       fi
 108
 109       dnl Test for older AIX API.
 110       if test $use_acl = 0 || test "$ac_cv_func_aclx_get" = yes; then
 111         AC_CHECK_FUNCS([statacl])
 112         if test $ac_cv_func_statacl = yes; then
 113           use_acl=1
 114         fi
 115       fi
 116
 117       dnl Test for NonStop Kernel API.
 118       if test $use_acl = 0; then
 119         AC_CHECK_FUNCS([aclsort])
 120         if test $ac_cv_func_aclsort = yes; then
 121           use_acl=1
 122         fi
 123       fi
 124
 125       LIBS=$ac_save_LIBS
 126     fi
 127     if test "x$enable_acl$use_acl" = "xyes0"; then
 128       AC_MSG_ERROR([ACLs enabled but support not detected])
 129     elif test "x$enable_acl$use_acl" = "xauto0"; then
 130       AC_MSG_WARN([libacl development library was not found or not usable.])
 131       AC_MSG_WARN([AC_PACKAGE_NAME will be built without ACL support.])
 132     fi
 133   fi
 134   AC_SUBST([LIB_ACL])
 135   AC_DEFINE_UNQUOTED([USE_ACL], [$use_acl],
 136     [Define to nonzero if you want access control list support.])
 137   USE_ACL=$use_acl
 138   AC_SUBST([USE_ACL])
 139 ])
 140
 141 # gl_ACL_GET_FILE(IF-WORKS, IF-NOT)
 142 # -------------------------------------
 143 # If 'acl_get_file' works (does not have a particular bug),
 144 # run IF-WORKS, otherwise, IF-NOT.
 145 # When building natively, test for a Darwin 8.7.0 bug, whereby acl_get_file
 146 # returns NULL, but sets errno = ENOENT for an existing file or directory.
 147 # When cross-compiling, assume that this old bug no longer applies.
 148 AC_DEFUN([gl_ACL_GET_FILE],
 149 [
 150   AC_CACHE_CHECK([for working acl_get_file], [gl_cv_func_working_acl_get_file],
 151     [gl_cv_func_working_acl_get_file=no
 152      AC_LINK_IFELSE(
 153        [AC_LANG_PROGRAM(
 154           [[#include <sys/types.h>
 155            #include <sys/acl.h>
 156            #include <errno.h>
 157           ]],
 158           [[if (!acl_get_file (".", ACL_TYPE_ACCESS) && errno == ENOENT)
 159               return 1;
 160             return 0;
 161           ]])],
 162        [if test $cross_compiling = yes; then
 163           gl_cv_func_working_acl_get_file="guessing yes"
 164         elif ./conftest$ac_exeext; then
 165           gl_cv_func_working_acl_get_file=yes
 166         fi])])
 167   AS_IF([test "$gl_cv_func_working_acl_get_file" != no], [$1], [$2])
 168 ])