37 lines
		
	
	
		
			762 B
		
	
	
	
		
			Nix
		
	
	
	
	
	
		
		
			
		
	
	
			37 lines
		
	
	
		
			762 B
		
	
	
	
		
			Nix
		
	
	
	
	
	
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								{ config, lib, ... }:
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								with lib;
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								{
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								  ###### interface
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								  options = {
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								    systemd.enableEmergencyMode = mkOption {
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								      default = true;
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								      type = types.bool;
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								      description = ''
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								        Whether to enable emergency mode, which is an
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								        <command>sulogin</command> shell started on the console if
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								        mounting a filesystem fails.  Since some machines (like EC2
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								        instances) have no console of any kind, emergency mode doesn't
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								        make sense, and it's better to continue with the boot insofar
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								        as possible.
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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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								    systemd.additionalUpstreamSystemUnits = optionals
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								      config.systemd.enableEmergencyMode [
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								        "emergency.target" "emergency.service"
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								      ];
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								  };
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								}
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