1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
|
{ lib
, stdenv
, callPackage
, runCommandLocal
, writeShellScript
, glibc
, pkgsi686Linux
, coreutils
, bubblewrap
}:
{ name ? null
, pname ? null
, version ? null
, runScript ? "bash"
, extraInstallCommands ? ""
, meta ? {}
, passthru ? {}
, extraPreBwrapCmds ? ""
, extraBwrapArgs ? []
, unshareUser ? false
, unshareIpc ? false
, unsharePid ? false
, unshareNet ? false
, unshareUts ? false
, unshareCgroup ? false
, privateTmp ? false
, dieWithParent ? true
, ...
} @ args:
assert (pname != null || version != null) -> (name == null && pname != null); # You must declare either a name or pname + version (preferred).
let
inherit (lib)
concatLines
concatStringsSep
escapeShellArgs
filter
optionalString
splitString
;
inherit (lib.attrsets) removeAttrs;
pname = if args ? name && args.name != null then args.name else args.pname;
versionStr = optionalString (version != null) ("-" + version);
name = pname + versionStr;
buildFHSEnv = callPackage ./buildFHSEnv.nix { };
fhsenv = buildFHSEnv (removeAttrs (args // { inherit name; }) [
"runScript" "extraInstallCommands" "meta" "passthru" "extraPreBwrapCmds" "extraBwrapArgs" "dieWithParent"
"unshareUser" "unshareCgroup" "unshareUts" "unshareNet" "unsharePid" "unshareIpc" "privateTmp"
"pname" "version"
]);
etcBindEntries = let
files = [
# NixOS Compatibility
"static"
"nix" # mainly for nixUnstable users, but also for access to nix/netrc
# Shells
"shells"
"bashrc"
"zshenv"
"zshrc"
"zinputrc"
"zprofile"
# Users, Groups, NSS
"passwd"
"group"
"shadow"
"hosts"
"resolv.conf"
"nsswitch.conf"
# User profiles
"profiles"
# Sudo & Su
"login.defs"
"sudoers"
"sudoers.d"
# Time
"localtime"
"zoneinfo"
# Other Core Stuff
"machine-id"
"os-release"
# PAM
"pam.d"
# Fonts
"fonts"
# ALSA
"alsa"
"asound.conf"
# SSL
"ssl/certs"
"ca-certificates"
"pki"
];
in map (path: "/etc/${path}") files;
# Create this on the fly instead of linking from /nix
# The container might have to modify it and re-run ldconfig if there are
# issues running some binary with LD_LIBRARY_PATH
createLdConfCache = ''
cat > /etc/ld.so.conf <<EOF
/lib
/lib/x86_64-linux-gnu
/lib64
/usr/lib
/usr/lib/x86_64-linux-gnu
/usr/lib64
/lib/i386-linux-gnu
/lib32
/usr/lib/i386-linux-gnu
/usr/lib32
/run/opengl-driver/lib
/run/opengl-driver-32/lib
EOF
ldconfig &> /dev/null
'';
init = run: writeShellScript "${name}-init" ''
source /etc/profile
${createLdConfCache}
exec ${run} "$@"
'';
indentLines = str: concatLines (map (s: " " + s) (filter (s: s != "") (splitString "\n" str)));
bwrapCmd = { initArgs ? "" }: ''
${extraPreBwrapCmds}
ignored=(/nix /dev /proc /etc ${optionalString privateTmp "/tmp"})
ro_mounts=()
symlinks=()
etc_ignored=()
for i in ${fhsenv}/*; do
path="/''${i##*/}"
if [[ $path == '/etc' ]]; then
:
elif [[ -L $i ]]; then
symlinks+=(--symlink "$(${coreutils}/bin/readlink "$i")" "$path")
ignored+=("$path")
else
ro_mounts+=(--ro-bind "$i" "$path")
ignored+=("$path")
fi
done
if [[ -d ${fhsenv}/etc ]]; then
for i in ${fhsenv}/etc/*; do
path="/''${i##*/}"
# NOTE: we're binding /etc/fonts and /etc/ssl/certs from the host so we
# don't want to override it with a path from the FHS environment.
if [[ $path == '/fonts' || $path == '/ssl' ]]; then
continue
fi
ro_mounts+=(--ro-bind "$i" "/etc$path")
etc_ignored+=("/etc$path")
done
fi
# propagate /etc from the actual host if nested
if [[ -e /.host-etc ]]; then
ro_mounts+=(--ro-bind /.host-etc /.host-etc)
else
ro_mounts+=(--ro-bind /etc /.host-etc)
fi
for i in ${escapeShellArgs etcBindEntries}; do
if [[ "''${etc_ignored[@]}" =~ "$i" ]]; then
continue
fi
if [[ -e $i ]]; then
symlinks+=(--symlink "/.host-etc/''${i#/etc/}" "$i")
fi
done
declare -a auto_mounts
# loop through all directories in the root
for dir in /*; do
# if it is a directory and it is not ignored
if [[ -d "$dir" ]] && [[ ! "''${ignored[@]}" =~ "$dir" ]]; then
# add it to the mount list
auto_mounts+=(--bind "$dir" "$dir")
fi
done
declare -a x11_args
# Always mount a tmpfs on /tmp/.X11-unix
# Rationale: https://github.com/flatpak/flatpak/blob/be2de97e862e5ca223da40a895e54e7bf24dbfb9/common/flatpak-run.c#L277
x11_args+=(--tmpfs /tmp/.X11-unix)
# Try to guess X socket path. This doesn't cover _everything_, but it covers some things.
if [[ "$DISPLAY" == :* ]]; then
display_nr=''${DISPLAY#?}
local_socket=/tmp/.X11-unix/X$display_nr
x11_args+=(--ro-bind-try "$local_socket" "$local_socket")
fi
${optionalString privateTmp ''
# sddm places XAUTHORITY in /tmp
if [[ "$XAUTHORITY" == /tmp/* ]]; then
x11_args+=(--ro-bind-try "$XAUTHORITY" "$XAUTHORITY")
fi
# dbus-run-session puts the socket in /tmp
IFS=";" read -ra addrs <<<"$DBUS_SESSION_BUS_ADDRESS"
for addr in "''${addrs[@]}"; do
[[ "$addr" == unix:* ]] || continue
IFS="," read -ra parts <<<"''${addr#unix:}"
for part in "''${parts[@]}"; do
printf -v part '%s' "''${part//\\/\\\\}"
printf -v part '%b' "''${part//%/\\x}"
[[ "$part" == path=/tmp/* ]] || continue
x11_args+=(--ro-bind-try "''${part#path=}" "''${part#path=}")
done
done
''}
cmd=(
${bubblewrap}/bin/bwrap
--dev-bind /dev /dev
--proc /proc
--chdir "$(pwd)"
${optionalString unshareUser "--unshare-user"}
${optionalString unshareIpc "--unshare-ipc"}
${optionalString unsharePid "--unshare-pid"}
${optionalString unshareNet "--unshare-net"}
${optionalString unshareUts "--unshare-uts"}
${optionalString unshareCgroup "--unshare-cgroup"}
${optionalString dieWithParent "--die-with-parent"}
--ro-bind /nix /nix
${optionalString privateTmp "--tmpfs /tmp"}
# Our glibc will look for the cache in its own path in `/nix/store`.
# As such, we need a cache to exist there, because pressure-vessel
# depends on the existence of an ld cache. However, adding one
# globally proved to be a bad idea (see #100655), the solution we
# settled on being mounting one via bwrap.
# Also, the cache needs to go to both 32 and 64 bit glibcs, for games
# of both architectures to work.
--tmpfs ${glibc}/etc \
--tmpfs /etc \
--symlink /etc/ld.so.conf ${glibc}/etc/ld.so.conf \
--symlink /etc/ld.so.cache ${glibc}/etc/ld.so.cache \
--ro-bind ${glibc}/etc/rpc ${glibc}/etc/rpc \
--remount-ro ${glibc}/etc \
'' + optionalString (stdenv.isx86_64 && stdenv.isLinux) (indentLines ''
--tmpfs ${pkgsi686Linux.glibc}/etc \
--symlink /etc/ld.so.conf ${pkgsi686Linux.glibc}/etc/ld.so.conf \
--symlink /etc/ld.so.cache ${pkgsi686Linux.glibc}/etc/ld.so.cache \
--ro-bind ${pkgsi686Linux.glibc}/etc/rpc ${pkgsi686Linux.glibc}/etc/rpc \
--remount-ro ${pkgsi686Linux.glibc}/etc \
'') + ''
"''${ro_mounts[@]}"
"''${symlinks[@]}"
"''${auto_mounts[@]}"
"''${x11_args[@]}"
${concatStringsSep "\n " extraBwrapArgs}
${init runScript} ${initArgs}
)
exec "''${cmd[@]}"
'';
bin = writeShellScript "${name}-bwrap" (bwrapCmd { initArgs = ''"$@"''; });
in runCommandLocal name {
inherit pname version;
inherit meta;
passthru = passthru // {
env = runCommandLocal "${name}-shell-env" {
shellHook = bwrapCmd {};
} ''
echo >&2 ""
echo >&2 "*** User chroot 'env' attributes are intended for interactive nix-shell sessions, not for building! ***"
echo >&2 ""
exit 1
'';
inherit args fhsenv;
};
} ''
mkdir -p $out/bin
ln -s ${bin} $out/bin/${pname}
${extraInstallCommands}
''
|