syschdemd: remount binfmt_misc inside the namespace

We need to do this so systemd-binfmt works
nix-community · Mar 26, 2022 · 8d7840d · 8d7840d
1 parent d3f21ef
commit 8d7840d
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Showing 2 changed files with 8 additions and 1 deletion.
diff --git a/syschdemd.nix b/syschdemd.nix
@@ -12,4 +12,9 @@ pkgs.substituteAll {
   inherit defaultUser;
   inherit (config.security) wrapperDir;
   fsPackagesPath = lib.makeBinPath config.system.fsPackages;
+
+  systemdWrapper = pkgs.writeShellScript "systemd-wrapper.sh" ''
+    mount -t binfmt_misc binfmt_misc /proc/sys/fs/binfmt_misc
+    exec systemd
+  '';
 }
diff --git a/syschdemd.sh b/syschdemd.sh
@@ -16,9 +16,11 @@ if [ ! -e "/run/current-system" ]; then
 fi
 
 if [ ! -e "/run/systemd.pid" ]; then
+    @wrapperDir@/umount /proc/sys/fs/binfmt_misc
+
     PATH=/run/current-system/systemd/lib/systemd:@fsPackagesPath@ \
         LOCALE_ARCHIVE=/run/current-system/sw/lib/locale/locale-archive \
-        @daemonize@/bin/daemonize /run/current-system/sw/bin/unshare -fp --mount-proc systemd
+        @daemonize@/bin/daemonize /run/current-system/sw/bin/unshare -fp --mount-proc @systemdWrapper@
     /run/current-system/sw/bin/pgrep -xf systemd >/run/systemd.pid
 
     # Wait for systemd to start