66 lines
1.6 KiB
Nix
66 lines
1.6 KiB
Nix
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#source of this code: https://github.com/NixOS/nixpkgs/blob/nixos-22.11/nixos/modules/system/boot/tmp.nix
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{ config, lib, ... }:
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with lib;
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let
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cfg = config.boot;
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in
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{
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###### interface
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options = {
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boot.cleanTmpDir = mkOption {
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type = types.bool;
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default = true;
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description = lib.mdDoc ''
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Whether to delete all files in {file}`/tmp` during boot.
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'';
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};
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boot.tmpOnTmpfs = mkOption {
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type = types.bool;
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default = true;
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description = lib.mdDoc ''
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Whether to mount a tmpfs on {file}`/tmp` during boot.
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'';
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};
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boot.tmpOnTmpfsSize = mkOption {
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type = types.oneOf [ types.str types.types.ints.positive ];
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default = "50%";
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description = lib.mdDoc ''
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Size of tmpfs in percentage.
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Percentage is defined by systemd.
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'';
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};
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};
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###### implementation
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config = {
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# When changing remember to update /tmp mount in virtualisation/qemu-vm.nix
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systemd.mounts = mkIf cfg.tmpOnTmpfs [
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{
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what = "tmpfs";
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where = "/tmp";
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type = "tmpfs";
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mountConfig.Options = concatStringsSep "," [ "mode=1777"
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"strictatime"
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"rw"
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"nosuid"
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"nodev"
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"size=${toString cfg.tmpOnTmpfsSize}" ];
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}
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];
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systemd.tmpfiles.rules = optional config.boot.cleanTmpDir "D! /tmp 1777 root root";
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};
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}
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