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Updated DBus service (markdown)

John Freed 2021-09-14 20:26:51 +02:00
parent b8c616600c
commit d615038a81
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DBus-service.md

@ -41,6 +41,37 @@ export DBUS_LAUNCHD_SESSION_BUS_SOCKET=$(launchctl getenv DBUS_LAUNCHD_SESSION_B
Note that this will work only from a normal Macintosh desktop session.
#### MacOS and SSH
As mentioned, the command lines above work only from a normal Macintosh desktop session, because `launchctl` is not available via SSH.
To work around this problem, there are two cases:
**Case 1: dbus is already running**
You can determine if dbus is already running with the command:
```
ps auxw|grep dbus|grep $(whoami)|grep session
```
If it is running, you can rely on the notion that the most recent listener in /private/tmp is assigned to this version of dbus. (This might not be 100% reliable in the future, so proceed at your own risk.) Use the command:
```
export DBUS_LAUNCHD_SESSION_BUS_SOCKET=$(find /private/tmp -type s -name unix_domain_listener -print0 | xargs -0 ls -rt|tail -n 1)
```
**Case 2: dbus is not running**
If you have determined that dbus is not running, you can choose your own address and set DBUS_LAUNCHD_SESSION_BUS_SOCKET to match it. For example, to use $HOME/Library/Caches/dbus/bus (make sure the directory exists and has permissions 0700):
```
mkdir -p $HOME/Library/Caches/dbus
chmod 0700 $HOME/Library/Caches/dbus
DBUS_LAUNCHD_SESSION_BUS_SOCKET=$HOME/Library/Caches/dbus/bus
/usr/local/Cellar/dbus/1.12.20/bin/dbus-daemon --nofork --session --address=$DBUS_LAUNCHD_SESSION_BUS_SOCKET
```
#### MacOS and dbus-send
In order for `dbus-send` to work correctly, it needs to either be started from a terminal within a normal Mac desktop session, or it needs to have the environment variable `DBUS_SESSION_BUS_ADDRESS` set correctly.