On 08/25/2015 10:53 PM, Csaba Láng wrote:
Dear list, is there a way to avoid that a patch which is run from a script either from crontab or just autorun from the system runs twice? I heard about --no-gui solution, but never managed to use it on Mac.
i don't know how "--no-gui" is supposed to help you here. it only might obfuscate the fact that two instances are running...
i can think of two simple ways to avoid double runs:
- setup a shared-ressource (a lock-file): when the script starts it
checks for the lock-file; if it is not there, it will create the lock, launch Pd; once Pd is finished it will remove the lock; if the lock *is* there, the script will exit immediately. see flock(1) on linux and shlock(1) on osx.
- stop all running instances of the patch before starting it.
usually you would just do something along the lines of pkill -KILL pd,
before starting a new instance of Pd.
fmasdr IOhannes