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shutdown: Protect system from make-initrd-ng

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This commit is contained in:
Will Fancher 2022-08-03 20:46:04 -04:00
parent 951c50ec6d
commit a454a706b5
1 changed files with 13 additions and 9 deletions
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22
nixos/modules/system/boot/systemd/shutdown.nix
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@ -33,26 +33,30 @@ in {
systemd.shutdownRamfs.contents."/shutdown".source = "${config.systemd.package}/lib/systemd/systemd-shutdown";
systemd.shutdownRamfs.storePaths = [pkgs.runtimeShell "${pkgs.coreutils}/bin"];
systemd.mounts = [{
what = "tmpfs";
where = "/run/initramfs";
type = "tmpfs";
}];
systemd.services.generate-shutdown-ramfs = {
description = "Generate shutdown ramfs";
wantedBy = [ "shutdown.target" ];
before = [ "shutdown.target" ];
unitConfig = {
DefaultDependencies = false;
RequiresMountsFor = "/run/initramfs";
ConditionFileIsExecutable = [
"!/run/initramfs/shutdown"
];
};
path = [pkgs.util-linux pkgs.makeInitrdNGTool];
serviceConfig.Type = "oneshot";
script = ''
mkdir -p /run/initramfs
if ! mountpoint -q /run/initramfs; then
mount -t tmpfs tmpfs /run/initramfs
fi
make-initrd-ng ${ramfsContents} /run/initramfs
'';
serviceConfig = {
Type = "oneshot";
ProtectSystem = "strict";
ReadWritePaths = "/run/initramfs";
ExecStart = "${pkgs.makeInitrdNGTool}/bin/make-initrd-ng ${ramfsContents} /run/initramfs";
};
};
};
}