{ stdenv, fetchurl, readline, pam ? null, openldap ? null
, popt, iniparser, libunwind
, fam ? null , acl ? null, cups ? null
, useKerberos ? false, kerberos ? null, winbind ? true

# Eg. smbclient and smbspool require a smb.conf file.
# If you set configDir to "" an empty configuration file
# $out/lib/smb.conf is is created for you.
#
# configDir defaults to "/etc/samba" so that smbpassword picks up
# the location of its passwd db files from the system configuration file
# /etc/samba/smb.conf. That's why nixos touches /etc/samba/smb.conf even if you
# don't enable the samba upstart service.
, configDir ? "/etc/samba"

}:

assert useKerberos -> kerberos != null;

stdenv.mkDerivation rec {
  name = "samba-3.6.25";

  src = fetchurl {
    url = "mirror://samba/pub/samba/stable/${name}.tar.gz";
    sha256 = "0l9pz2m67vf398q3c2dwn8jwdxsjb20igncf4byhv6yq5dzqlb4g";
  };

  patches = [(fetchurl {
    url = "https://download.samba.org/pub/samba/patches/security/"
        + "samba-3.6.25-security-2015-12-16.patch";
    sha256 = "00dcjcn577825mfdwdp76jfy5kcrqw3s4d5c41gqdq5gfcdbmqdb";
  })];

  buildInputs = [ readline pam openldap popt iniparser libunwind fam acl cups ]
    ++ stdenv.lib.optional useKerberos kerberos;

  enableParallelBuilding = true;

  postPatch =
    # XXX: Awful hack to allow cross-compilation.
    '' sed -i source3/configure \
           -e 's/^as_fn_error .. \("cannot run test program while cross compiling\)/$as_echo \1/g'
    ''; # "

  preConfigure =
    '' cd source3
       export samba_cv_CC_NEGATIVE_ENUM_VALUES=yes
       export libreplace_cv_HAVE_GETADDRINFO=yes
       export ac_cv_file__proc_sys_kernel_core_pattern=no # XXX: true on Linux, false elsewhere
    '';

  configureFlags =
    stdenv.lib.optionals (pam != null) [ "--with-pam" "--with-pam_smbpass" ]
    ++ [ "--with-aio-support"
         "--disable-swat"
         "--with-configdir=${configDir}"
         "--with-fhs"
         "--localstatedir=/var"
       ]
    ++ (stdenv.lib.optional winbind "--with-winbind")
    ++ (stdenv.lib.optional (stdenv.cc.libc != null) "--with-libiconv=${stdenv.cc.libc}");

  # Need to use a DESTDIR because `make install' tries to write in /var and /etc.
  installFlags = "DESTDIR=$(TMPDIR)/inst";

  stripAllList = [ "bin" "sbin" ];

  postInstall =
    ''
      mkdir -p $out
      mv $TMPDIR/inst/$out/* $out/

      mkdir -p "$out/lib/pkgconfig"
      cp pkgconfig/*.pc "$out/lib/pkgconfig"

      mkdir -pv $out/lib/cups/backend
      ln -sv ../../../bin/smbspool $out/lib/cups/backend/smb
      mkdir -pv $out/etc/openldap/schema
      cp ../examples/LDAP/samba.schema $out/etc/openldap/schema

      # For nsswitch. Glibc >= 2.1 looks for libnss_<name>.so.2 (see man
      # nsswitch.conf), so provide that too.
      cp -v ../nsswitch/libnss_wins.so "$out/lib"
      cp -v ../nsswitch/libnss_winbind.so "$out/lib"
      (cd "$out/lib" && ln -s libnss_winbind.so libnss_winbind.so.2)
      (cd "$out/lib" && ln -s libnss_wins.so libnss_wins.so.2)
    '' # */
    + stdenv.lib.optionalString (configDir == "") "touch $out/lib/smb.conf";

  meta = {
    homepage = https://www.samba.org/;
    description = "The standard Windows interoperability suite of programs for Linux and Unix";
    platforms = stdenv.lib.platforms.linux;
    knownVulnerabilities = [
      "Numerous CVEs and no patches from upstream for 3.x since 2014."
    ];
  };
}