documentation: add document listing all unit file settings also supported for transient units
Unfortunately, there are far too many properties currently not accessible to transient units. The first step to opening them all up is to figure out which ones they are.
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Lennart Poettering
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# What settings are currently available for transient units?
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Our intention is to make all settings that are available as unit file settings
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also available for transient units, through the D-Bus API. At the moment, some
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unit types (socket, swap, path) are not supported at all via unit types, but
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most others are pretty well supported, with some notable omissions.
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The lists below contain all settings currently available in unit files. The
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ones currently available in transient units are prefixed with `✓`.
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## Generic Unit Settings
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Only the most important generic unit settings are available for transient units.
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```
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✓ Description=
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Documentation=
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SourcePath=
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✓ Requires=
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✓ Requisite=
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✓ Wants=
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✓ BindsTo=
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✓ Conflicts=
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✓ Before=
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✓ After=
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✓ OnFailure=
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✓ PropagatesReloadTo=
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✓ ReloadPropagatedFrom=
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✓ PartOf=
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JoinsNamespaceOf=
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RequiresMountsFor=
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StopWhenUnneeded=
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RefuseManualStart=
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RefuseManualStop=
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AllowIsolate=
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✓ DefaultDependencies=
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OnFailureJobMode=
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OnFailureIsolate=
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IgnoreOnIsolate=
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JobTimeoutSec=
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JobRunningTimeoutSec=
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JobTimeoutAction=
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JobTimeoutRebootArgument=
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StartLimitIntervalSec=SECONDS
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StartLimitBurst=UNSIGNED
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StartLimitAction=ACTION
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✓ FailureAction=
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✓ SuccessAction=
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✓ AddRef=
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RebootArgument=STRING
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ConditionPathExists=
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ConditionPathExistsGlob=
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ConditionPathIsDirectory=
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ConditionPathIsSymbolicLink=
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ConditionPathIsMountPoint=
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ConditionPathIsReadWrite=
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ConditionDirectoryNotEmpty=
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ConditionFileNotEmpty=
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ConditionFileIsExecutable=
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ConditionNeedsUpdate=
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ConditionFirstBoot=
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ConditionKernelCommandLine=
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ConditionArchitecture=
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ConditionVirtualization=
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ConditionSecurity=
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ConditionCapability=
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ConditionHost=
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ConditionACPower=
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ConditionUser=
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ConditionGroup=
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AssertPathExists=
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AssertPathExistsGlob=
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AssertPathIsDirectory=
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AssertPathIsSymbolicLink=
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AssertPathIsMountPoint=
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AssertPathIsReadWrite=
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AssertDirectoryNotEmpty=
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AssertFileNotEmpty=
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AssertFileIsExecutable=
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AssertNeedsUpdate=
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AssertFirstBoot=
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AssertKernelCommandLine=
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AssertArchitecture=
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AssertVirtualization=
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AssertSecurity=
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AssertCapability=
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AssertHost=
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AssertACPower=
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AssertUser=
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AssertGroup=
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✓ CollectMode=
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```
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## Execution-Related Settings
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All execution-related settings are available for transient units.
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```
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✓ WorkingDirectory=
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✓ RootDirectory=
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✓ RootImage=
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✓ User=
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✓ Group=
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✓ SupplementaryGroups=
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✓ Nice=
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✓ OOMScoreAdjust=
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✓ IOSchedulingClass=
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✓ IOSchedulingPriority=
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✓ CPUSchedulingPolicy=
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✓ CPUSchedulingPriority=
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✓ CPUSchedulingResetOnFork=
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✓ CPUAffinity=
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✓ UMask=
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✓ Environment=
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✓ EnvironmentFile=
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✓ PassEnvironment=
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✓ UnsetEnvironment=
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✓ DynamicUser=
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✓ RemoveIPC=
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✓ StandardInput=
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✓ StandardOutput=
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✓ StandardError=
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✓ StandardInputText=
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✓ StandardInputData=
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✓ TTYPath=
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✓ TTYReset=
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✓ TTYVHangup=
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✓ TTYVTDisallocate=
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✓ SyslogIdentifier=
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✓ SyslogFacility=
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✓ SyslogLevel=
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✓ SyslogLevelPrefix=
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✓ LogLevelMax=
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✓ LogExtraFields=
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✓ SecureBits=
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✓ CapabilityBoundingSet=
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✓ AmbientCapabilities=
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✓ TimerSlackNSec=
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✓ NoNewPrivileges=
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✓ KeyringMode=
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✓ SystemCallFilter=
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✓ SystemCallArchitectures=
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✓ SystemCallErrorNumber=
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✓ MemoryDenyWriteExecute=
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✓ RestrictNamespaces=
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✓ RestrictRealtime=
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✓ RestrictAddressFamilies=
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✓ LockPersonality=
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✓ LimitCPU=
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✓ LimitFSIZE=
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✓ LimitDATA=
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✓ LimitSTACK=
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✓ LimitCORE=
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✓ LimitRSS=
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✓ LimitNOFILE=
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✓ LimitAS=
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✓ LimitNPROC=
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✓ LimitMEMLOCK=
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✓ LimitLOCKS=
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✓ LimitSIGPENDING=
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✓ LimitMSGQUEUE=
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✓ LimitNICE=
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✓ LimitRTPRIO=
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✓ LimitRTTIME=
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✓ ReadWritePaths=
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✓ ReadOnlyPaths=
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✓ InaccessiblePaths=
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✓ BindPaths=
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✓ BindReadOnlyPaths=
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✓ PrivateTmp=
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✓ PrivateDevices=
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✓ ProtectKernelTunables=
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✓ ProtectKernelModules=
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✓ ProtectControlGroups=
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✓ PrivateNetwork=
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✓ PrivateUsers=
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✓ ProtectSystem=
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✓ ProtectHome=
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✓ MountFlags=
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✓ MountAPIVFS=
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✓ Personality=
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✓ RuntimeDirectoryPreserve=
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✓ RuntimeDirectoryMode=
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✓ RuntimeDirectory=
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✓ StateDirectoryMode=
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✓ StateDirectory=
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✓ CacheDirectoryMode=
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✓ CacheDirectory=
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✓ LogsDirectoryMode=
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✓ LogsDirectory=
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✓ ConfigurationDirectoryMode=
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✓ ConfigurationDirectory=
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✓ PAMName=
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✓ IgnoreSIGPIPE=
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✓ UtmpIdentifier=
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✓ UtmpMode=
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✓ SELinuxContext=
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✓ SmackProcessLabel=
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✓ AppArmorProfile=
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✓ Slice=
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```
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## Resource Control Settings
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All cgroup/resource control settings are available for transient units
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```
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✓ CPUAccounting=
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✓ CPUWeight=
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✓ StartupCPUWeight=
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✓ CPUShares=
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✓ StartupCPUShares=
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✓ CPUQuota=
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✓ MemoryAccounting=
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✓ MemoryLow=
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✓ MemoryHigh=
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✓ MemoryMax=
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✓ MemorySwapMax=
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✓ MemoryLimit=
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✓ DeviceAllow=
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✓ DevicePolicy=
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✓ IOAccounting=
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✓ IOWeight=
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✓ StartupIOWeight=
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✓ IODeviceWeight=
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✓ IOReadBandwidthMax=
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✓ IOWriteBandwidthMax=
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✓ IOReadIOPSMax=
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✓ IOWriteIOPSMax=
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✓ BlockIOAccounting=
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✓ BlockIOWeight=
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✓ StartupBlockIOWeight=
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✓ BlockIODeviceWeight=
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✓ BlockIOReadBandwidth=
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✓ BlockIOWriteBandwidth=
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✓ TasksAccounting=
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✓ TasksMax=
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✓ Delegate=
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✓ IPAccounting=
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✓ IPAddressAllow=
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✓ IPAddressDeny=
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```
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## Process Killing Settings
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All process killing settings are available for transient units:
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```
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✓ SendSIGKILL=
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✓ SendSIGHUP=
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✓ KillMode=
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✓ KillSignal=
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```
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## Service Unit Settings
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Only the most important service settings are available for transient units.
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```
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PIDFile=
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✓ ExecStartPre=
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✓ ExecStart=
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✓ ExecStartPost=
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✓ ExecReload=
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✓ ExecStop=
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✓ ExecStopPost=
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RestartSec=
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TimeoutStartSec=
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TimeoutStopSec=
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TimeoutSec=
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✓ RuntimeMaxSec=
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WatchdogSec=
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✓ Type=
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✓ Restart=
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PermissionsStartOnly=
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RootDirectoryStartOnly=
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✓ RemainAfterExit=
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GuessMainPID=
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RestartPreventExitStatus=
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RestartForceExitStatus=
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SuccessExitStatus=
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✓ NonBlocking=
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BusName=
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✓ FileDescriptorStoreMax=
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✓ NotifyAccess=
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Sockets=
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USBFunctionDescriptors=
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USBFunctionStrings=
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```
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## Mount Unit Settings
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Only the most important mount unit settings are currently available to transient units:
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```
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✓ What=
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Where=
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✓ Options=
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✓ Type=
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TimeoutSec=
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DirectoryMode=
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SloppyOptions=
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LazyUnmount=
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ForceUnmount=
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```
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## Automount Unit Settings
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Only one automount unit setting is currently available to transient units:
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```
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Where=
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DirectoryMode=
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✓ TimeoutIdleSec=
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```
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## Timer Unit Settings
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Most timer unit settings are available to transient units.
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```
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✓ OnCalendar=
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✓ OnActiveSec=
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✓ OnBootSec=
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✓ OnStartupSec=
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✓ OnUnitActiveSec=
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✓ OnUnitInactiveSec=
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Persistent=
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✓ WakeSystem=
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✓ RemainAfterElapse=
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✓ AccuracySec=
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✓ RandomizedDelaySec=
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Unit=
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```
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## Slice Unit Settings
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Slice units are fully supported as transient units, but they have no settings
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of their own beyond the generic unit and resource control settings.
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## Scope Unit Settings
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Scope units are fully supported as transient units (in fact they only exist as
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such), but they have no settings of their own beyond the generic unit and
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resource control settings.
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## Socket Unit Settings
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Socket units are currently not available at all as transient units:
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```
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ListenStream=
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ListenDatagram=
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ListenSequentialPacket=
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ListenFIFO=
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ListenNetlink=
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ListenSpecial=
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ListenMessageQueue=
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ListenUSBFunction=
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SocketProtocol=
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BindIPv6Only=
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Backlog=
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BindToDevice=
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ExecStartPre=
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ExecStartPost=
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ExecStopPre=
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ExecStopPost=
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TimeoutSec=
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SocketUser=
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SocketGroup=
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SocketMode=
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DirectoryMode=
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Accept=
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Writable=
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MaxConnections=
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MaxConnectionsPerSource=
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KeepAlive=
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KeepAliveTimeSec=
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KeepAliveIntervalSec=
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KeepAliveProbes=
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DeferAcceptSec=
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NoDelay=
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Priority=
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ReceiveBuffer=
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SendBuffer=
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IPTOS=
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IPTTL=
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Mark=
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PipeSize=
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FreeBind=
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Transparent=
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Broadcast=
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PassCredentials=
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PassSecurity=
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TCPCongestion=
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ReusePort=
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MessageQueueMaxMessages=
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MessageQueueMessageSize=
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RemoveOnStop=
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Symlinks=
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FileDescriptorName=
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Service=
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TriggerLimitIntervalSec=
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TriggerLimitBurst=
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SmackLabel=
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SmackLabelIPIn=
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SmackLabelIPOut=
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SELinuxContextFromNet=
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```
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## Swap Unit Settings
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Swap units are currently not available at all as transient units:
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```
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What=
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Priority=
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Options=
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TimeoutSec=
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```
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## Path Unit Settings
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Path units are currently not available at all as transient units:
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```
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PathExists=
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PathExistsGlob=
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PathChanged=
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PathModified=
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DirectoryNotEmpty=
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Unit=
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MakeDirectory=
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DirectoryMode=
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```
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## Install Section
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||||
The `[Install]` section is currently not available at all for transient units, and it probably doesn't even make sense.
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||||
|
||||
```
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||||
Alias=
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WantedBy=
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RequiredBy=
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Also=
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DefaultInstance=
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```
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