-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 On 2019/11/05 02:48 PM, deloptes wrote: > Michele Calgaro via trinity-devel wrote: > >> --no-fork is a parameter that can be passed to TDE application to prevent the program to run using fork, so that >> you can run multiple independent instances of such application. Without that, some applications will check if >> there is already an existing instance of the same application and switch to it instead of creating a new one. > > Ah and forgot to mention when it forks I get a different PID in the funtion I start it, so this is also unreliable. > Obviously I need to look how fork works exactly > > In brief, fork creates a "duplicate process" but with different memory areas and then you have two processes continuing from the same point in the code. Usually the code will do different things depending on whether it is the parent process or the child one. In details, it is a bit more complex than what I described, but the ultimate idea is as above. - --no-fork is usually good when you want to attach gdb to debug a problem, since you will not need to worry about separate forked processes. According to processIdentifier() documentation, -1 is returned if no process is associated with the TQProcess object you are using. I think a "ps" or "pidof" is an easier way to go. Cheers Michele -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEjhl1z5vbYB3YbFTiKnW3yore1c8FAl3BiKQACgkQKnW3yore 1c+fgRAA0C9vgJ+yJLYIQ7frD9zJSQHpUbTx4weT0Fg40XFl1iKR8saMd/sxVZjf X240XenN2yN1wvfQ1gCLuTdaUSD0UmUUwrRlDwraKmFU6hPRwlMEDrkXAbL4g9GY U3ajjeVDXH/orYfKVYi4aQSbKxpMkx5AgmIjau3fuIsz7TQ1ffp7sxJ2S8o2M7dR EpJASLFWa0/UE6ruK279RXFXpXrtEk7tcOUxcgNEBQZnF6Sxk5VPzodLfDhryGJb wlgmKXxep+DlN7HROQC5XzsXmE0FxyLTiNMn8ma2Vc97yUNQd1OARtAiHFxo16gT m3qVYnNyUT3vmWmzzkr/UVK3Gjdv/8D/1BhawqGZ/bKD2xq0BHYDbI7LJGdKAlOe 6iyGaGxkaCW4qjMhjY0gqF3cVGKW0vZRWpZeIJjTp5askCG03XNJrIey8cHid16g U017F4HLEct8NKM8oX5UPN60cydliaxhvllE3s9DWclftzK22FuT0IncLAtuFG/z u6TdA6wfHOK3mnMb6cVJ0+D/Ba8o49CN4YnxSebkh+p26n0oPtrZREXnVuS2BmYb pBmQbWBvHsyQFwvro4IK9ce8sg796xxytuV08v3MPmoViT9UZu0lkaDDihFQd17w VS051urXDA924UReqclNcGifu4+1OqZDGItecddmvR5mKQpRa3s= =Dhol -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: trinity-devel-unsubscribe@xxxxxxxxxxxxxxxxxxxxxxxxxx For additional commands, e-mail: trinity-devel-help@xxxxxxxxxxxxxxxxxxxxxxxxxx Read list messages on the web archive: http://trinity-devel.pearsoncomputing.net/ Please remember not to top-post: http://trinity.pearsoncomputing.net/mailing_lists/#top-posting
