-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 11/19/2013 1:05 PM, Karel Zak wrote: > but why you don't want --wait behavior? It does not change > anything, but fix the problem with group leader. I *do* want that behavior, I just think it was supposed to have been that way all along and which behavior you get should NOT depend on whether it is a group leader or not. > IMHO we can make it (--wait) the default (you almost convinced me > that the default behaviour should be fixed). Why even have the option then? Does anyone actually want the non wait behavior? If they have to add a switch to get it, they may as well just have the shell background the job. Simpler and cleaner than a switch. > fork for sleep() and then kill it Why is that worse than fork then exec? And I thought swapping the group leader so the parent process can call setsid() was pretty clever ;) > I'm also not sure if remove --wait is the best way... what about > people who already use it? (yep, it's release few weeks ago, > but...) The longer it stays in, the more people will use it. Best to get rid of it now if it wasn't such a great idea, otherwise it will be there forever. > If I good understand the man page then setsid() caller is session > and group leader of the *new* session and group. It's probably > unwanted to make the original group orphaned (without leader), > because processes in orphaned group get SIGCONT from kernel... > > (BTW, SIGCONT is probably what will happen in your version after > kill(pid) as the sleeping child is group leader, right?) I think that happens the old way too: as soon as setsid exits after successfully forking the child, then the group is orphaned. In other words, both setpgrp() and exit() remove this process from being the group leader. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (MingW32) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJSi8DXAAoJEJrBOlT6nu75N+AH/1qyxjdJ2h+nJgN6BhIQ5WfN SaEbSmVPGFKEFKS3ltVnH+aGfS9WJiQO5DitNewrqOlek3VSvwG3T9WZRmDPjg0M gSaTPQMVFDIAcMcaUt71AXBEMxHLZUI5rEDLwXraaDT9ISGSGjCNRpfTrwSCwiHY jUrulunvS0z2WkqyJbHjQZK19Z0waOEvUO7KH8UK/BWqZ2ybCHvCmC1D/uq3K09A 1dmavup13NNbxF7mG80QqdWfm9nN54N1sQ8iPUrzrQyW/6b29aSfUr74JMKbbSzt Rodimqio/sYpf7iSbMDA4+Gmswh//IANOf9235h8s5LDb1EghSdVzl5ktu+2aLU= =ZK8O -----END PGP SIGNATURE----- -- To unsubscribe from this list: send the line "unsubscribe util-linux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
