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# serial 5 -*- Autoconf -*-
# Copyright (C) 2006-2007, 2009-2020 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.
# From Jim Meyering
# Provide <selinux/selinux.h>, if necessary.
# If it is already present, provide wrapper functions to guard against
# misbehavior from getfilecon, lgetfilecon, and fgetfilecon.
AC_DEFUN([gl_HEADERS_SELINUX_SELINUX_H],
[
AC_REQUIRE([gl_LIBSELINUX])
if test "$with_selinux" != no; then
AC_CHECK_HEADERS([selinux/selinux.h])
if test "$ac_cv_header_selinux_selinux_h" = yes; then
# We do have <selinux/selinux.h>, so do compile getfilecon.c
# and arrange to use its wrappers.
gl_CHECK_NEXT_HEADERS([selinux/selinux.h])
AC_DEFINE([getfilecon], [rpl_getfilecon],
[Always use our getfilecon wrapper.])
AC_DEFINE([lgetfilecon], [rpl_lgetfilecon],
[Always use our lgetfilecon wrapper.])
AC_DEFINE([fgetfilecon], [rpl_fgetfilecon],
[Always use our fgetfilecon wrapper.])
fi
case "$ac_cv_search_setfilecon:$ac_cv_header_selinux_selinux_h" in
no:*) # already warned
;;
*:no)
AC_MSG_WARN([libselinux was found but selinux/selinux.h is missing.])
AC_MSG_WARN([AC_PACKAGE_NAME will be compiled without SELinux support.])
esac
else
# Do as if <selinux/selinux.h> does not exist, even if
# AC_CHECK_HEADERS_ONCE has already determined that it exists.
AC_DEFINE([HAVE_SELINUX_SELINUX_H], [0])
fi
])
AC_DEFUN([gl_LIBSELINUX],
[
AC_REQUIRE([AC_CANONICAL_HOST])
AC_REQUIRE([AC_CANONICAL_BUILD])
AC_ARG_WITH([selinux],
AS_HELP_STRING([--without-selinux], [do not use SELinux, even on systems with SELinux]),
[], [with_selinux=maybe])
LIB_SELINUX=
if test "$with_selinux" != no; then
gl_save_LIBS=$LIBS
AC_SEARCH_LIBS([setfilecon], [selinux],
[test "$ac_cv_search_setfilecon" = "none required" ||
LIB_SELINUX=$ac_cv_search_setfilecon])
LIBS=$gl_save_LIBS
fi
AC_SUBST([LIB_SELINUX])
# Warn if SELinux is found but libselinux is absent;
if test "$ac_cv_search_setfilecon" = no; then
if test "$host" = "$build" && test -d /selinux; then
AC_MSG_WARN([This system supports SELinux but libselinux is missing.])
AC_MSG_WARN([AC_PACKAGE_NAME will be compiled without SELinux support.])
fi
with_selinux=no
fi
])
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