mirror of https://github.com/k3s-io/k3s
70 lines
2.4 KiB
Go
70 lines
2.4 KiB
Go
/*
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Package dbus implements bindings to the D-Bus message bus system.
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To use the message bus API, you first need to connect to a bus (usually the
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session or system bus). The acquired connection then can be used to call methods
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on remote objects and emit or receive signals. Using the Export method, you can
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arrange D-Bus methods calls to be directly translated to method calls on a Go
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value.
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Conversion Rules
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For outgoing messages, Go types are automatically converted to the
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corresponding D-Bus types. The following types are directly encoded as their
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respective D-Bus equivalents:
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Go type | D-Bus type
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------------+-----------
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byte | BYTE
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bool | BOOLEAN
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int16 | INT16
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uint16 | UINT16
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int | INT32
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uint | UINT32
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int32 | INT32
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uint32 | UINT32
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int64 | INT64
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uint64 | UINT64
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float64 | DOUBLE
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string | STRING
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ObjectPath | OBJECT_PATH
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Signature | SIGNATURE
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Variant | VARIANT
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interface{} | VARIANT
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UnixFDIndex | UNIX_FD
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Slices and arrays encode as ARRAYs of their element type.
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Maps encode as DICTs, provided that their key type can be used as a key for
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a DICT.
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Structs other than Variant and Signature encode as a STRUCT containing their
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exported fields. Fields whose tags contain `dbus:"-"` and unexported fields will
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be skipped.
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Pointers encode as the value they're pointed to.
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Types convertible to one of the base types above will be mapped as the
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base type.
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Trying to encode any other type or a slice, map or struct containing an
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unsupported type will result in an InvalidTypeError.
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For incoming messages, the inverse of these rules are used, with the exception
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of STRUCTs. Incoming STRUCTS are represented as a slice of empty interfaces
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containing the struct fields in the correct order. The Store function can be
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used to convert such values to Go structs.
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Unix FD passing
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Handling Unix file descriptors deserves special mention. To use them, you should
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first check that they are supported on a connection by calling SupportsUnixFDs.
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If it returns true, all method of Connection will translate messages containing
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UnixFD's to messages that are accompanied by the given file descriptors with the
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UnixFD values being substituted by the correct indices. Similarly, the indices
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of incoming messages are automatically resolved. It shouldn't be necessary to use
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UnixFDIndex.
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*/
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package dbus
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