Ophestra
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This enables external testing of system.I state. Signed-off-by: Ophestra <cat@gensokyo.uk>
70 lines
2.9 KiB
Go
70 lines
2.9 KiB
Go
// Package dbus wraps xdg-dbus-proxy and implements configuration and sandboxing of the underlying helper process.
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package dbus
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import (
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"fmt"
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"os"
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"sync"
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)
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const (
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/*
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SessionBusAddress is the name of the environment variable where the address of the login session message bus is given in.
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If that variable is not set, applications may also try to read the address from the X Window System root window property _DBUS_SESSION_BUS_ADDRESS.
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The root window property must have type STRING. The environment variable should have precedence over the root window property.
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The address of the login session message bus is given in the DBUS_SESSION_BUS_ADDRESS environment variable.
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If DBUS_SESSION_BUS_ADDRESS is not set, or if it's set to the string "autolaunch:",
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the system should use platform-specific methods of locating a running D-Bus session server,
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or starting one if a running instance cannot be found.
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Note that this mechanism is not recommended for attempting to determine if a daemon is running.
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It is inherently racy to attempt to make this determination, since the bus daemon may be started just before or just after the determination is made.
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Therefore, it is recommended that applications do not try to make this determination for their functionality purposes, and instead they should attempt to start the server.
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This package diverges from the specification, as the caller is unlikely to be an X client, or be in a position to autolaunch a dbus server.
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So a fallback address with a socket located in the well-known default XDG_RUNTIME_DIR formatting is used.
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*/
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SessionBusAddress = "DBUS_SESSION_BUS_ADDRESS"
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/*
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SystemBusAddress is the name of the environment variable where the address of the system message bus is given in.
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If that variable is not set, applications should try to connect to the well-known address unix:path=/var/run/dbus/system_bus_socket.
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Implementations of the well-known system bus should listen on an address that will result in that connection being successful.
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*/
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SystemBusAddress = "DBUS_SYSTEM_BUS_ADDRESS"
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// FallbackSystemBusAddress is used when [SystemBusAddress] is not set.
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FallbackSystemBusAddress = "unix:path=/var/run/dbus/system_bus_socket"
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)
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var (
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address [2]string
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addressOnce sync.Once
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)
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// Address returns the session and system bus addresses copied from environment,
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// or appropriate fallback values if they are not set.
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func Address() (session, system string) {
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addressOnce.Do(func() {
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// resolve upstream session bus address
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if addr, ok := os.LookupEnv(SessionBusAddress); !ok {
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// fall back to default format
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address[0] = fmt.Sprintf("unix:path=/run/user/%d/bus", os.Getuid())
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} else {
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address[0] = addr
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}
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// resolve upstream system bus address
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if addr, ok := os.LookupEnv(SystemBusAddress); !ok {
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// fall back to default hardcoded value
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address[1] = FallbackSystemBusAddress
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} else {
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address[1] = addr
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}
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})
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return address[0], address[1]
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}
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