nixpkgs/pkgs/os-specific/linux/pam_usb/default.nix
2020-04-10 17:54:53 +01:00

77 lines
2.2 KiB
Nix

{ stdenv, fetchurl, makeWrapper, dbus, libxml2, pam, pkgconfig, pmount, pythonPackages, writeScript, runtimeShell }:
let
# Search in the environment if the same program exists with a set uid or
# set gid bit. If it exists, run the first program found, otherwise run
# the default binary.
useSetUID = drv: path:
let
name = baseNameOf path;
bin = "${drv}${path}";
in assert name != "";
writeScript "setUID-${name}" ''
#!${runtimeShell}
inode=$(stat -Lc %i ${bin})
for file in $(type -ap ${name}); do
case $(stat -Lc %a $file) in
([2-7][0-7][0-7][0-7])
if test -r "$file".real; then
orig=$(cat "$file".real)
if test $inode = $(stat -Lc %i "$orig"); then
exec "$file" "$@"
fi
fi;;
esac
done
exec ${bin} "$@"
'';
pmountBin = useSetUID pmount "/bin/pmount";
pumountBin = useSetUID pmount "/bin/pumount";
inherit (pythonPackages) python dbus-python;
in
stdenv.mkDerivation rec {
name = "pam_usb-0.5.0";
src = fetchurl {
url = "mirror://sourceforge/pamusb/${name}.tar.gz";
sha256 = "1g1w0s9d8mfld8abrn405ll5grv3xgs0b0hsganrz6qafdq9j7q1";
};
buildInputs = [
makeWrapper
# pam_usb dependencies
dbus libxml2 pam pmount pkgconfig
# pam_usb's tools dependencies
python
# cElementTree is included with python 2.5 and later.
];
preBuild = ''
makeFlagsArray=(DESTDIR=$out)
substituteInPlace ./src/volume.c \
--replace 'pmount' '${pmountBin}' \
--replace 'pumount' '${pumountBin}'
'';
# pmount is append to the PATH because pmounts binaries should have a set uid bit.
postInstall = ''
mv $out/usr/* $out/. # fix color */
rm -rf $out/usr
for prog in $out/bin/pamusb-conf $out/bin/pamusb-agent; do
substituteInPlace $prog --replace '/usr/bin/env python' '/bin/python'
wrapProgram $prog \
--prefix PYTHONPATH : "$(toPythonPath ${dbus-python})"
done
'';
meta = {
homepage = "http://pamusb.org/";
description = "Authentication using USB Flash Drives";
license = stdenv.lib.licenses.gpl2;
platforms = stdenv.lib.platforms.linux;
};
}