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1{ lib, stdenv, fetchurl, makeWrapper, dbus, libxml2, pam, pkg-config, pmount, python2Packages, writeScript, runtimeShell }:
2
3let
4
5 # Search in the environment if the same program exists with a set uid or
6 # set gid bit. If it exists, run the first program found, otherwise run
7 # the default binary.
8 useSetUID = drv: path:
9 let
10 name = baseNameOf path;
11 bin = "${drv}${path}";
12 in assert name != "";
13 writeScript "setUID-${name}" ''
14 #!${runtimeShell}
15 inode=$(stat -Lc %i ${bin})
16 for file in $(type -ap ${name}); do
17 case $(stat -Lc %a $file) in
18 ([2-7][0-7][0-7][0-7])
19 if test -r "$file".real; then
20 orig=$(cat "$file".real)
21 if test $inode = $(stat -Lc %i "$orig"); then
22 exec "$file" "$@"
23 fi
24 fi;;
25 esac
26 done
27 exec ${bin} "$@"
28 '';
29
30 pmountBin = useSetUID pmount "/bin/pmount";
31 pumountBin = useSetUID pmount "/bin/pumount";
32 inherit (python2Packages) python dbus-python;
33in
34
35stdenv.mkDerivation rec {
36 pname = "pam_usb";
37 version = "0.5.0";
38
39 src = fetchurl {
40 url = "mirror://sourceforge/pamusb/pam_usb-${version}.tar.gz";
41 sha256 = "1g1w0s9d8mfld8abrn405ll5grv3xgs0b0hsganrz6qafdq9j7q1";
42 };
43
44 nativeBuildInputs = [
45 makeWrapper
46 pkg-config
47 ];
48
49 buildInputs = [
50 # pam_usb dependencies
51 dbus libxml2 pam pmount
52 # pam_usb's tools dependencies
53 python
54 # cElementTree is included with python 2.5 and later.
55 ];
56
57 preBuild = ''
58 makeFlagsArray=(DESTDIR=$out)
59 substituteInPlace ./src/volume.c \
60 --replace 'pmount' '${pmountBin}' \
61 --replace 'pumount' '${pumountBin}'
62 '';
63
64 # pmount is append to the PATH because pmounts binaries should have a set uid bit.
65 postInstall = ''
66 mv $out/usr/* $out/. # fix color */
67 rm -rf $out/usr
68 for prog in $out/bin/pamusb-conf $out/bin/pamusb-agent; do
69 substituteInPlace $prog --replace '/usr/bin/env python' '/bin/python'
70 wrapProgram $prog \
71 --prefix PYTHONPATH : "$(toPythonPath ${dbus-python})"
72 done
73 '';
74
75 meta = {
76 homepage = "http://pamusb.org/";
77 description = "Authentication using USB Flash Drives";
78 license = lib.licenses.gpl2;
79 platforms = lib.platforms.linux;
80 };
81}