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Re^2: Forking and running all child processes at the same time

by jimbojones (Friar)
on Jun 06, 2005 at 14:34 UTC ( #463922=note: print w/replies, xml ) Need Help??

in reply to Re: Forking and running all child processes at the same time
in thread Forking and running all child processes at the same time

As pointed out by BrowserUK in this node Re: Unix Review column, your:
1 while wait > 0; # avoid zombies
won't work on windows systems. The windows implementation uses the negative of the thread ID as the pid, so wait returns negative numbers for all children.

It seems the most cross-platform wait statement is:
1 while wait != -1 ; # avoid zombies
since the main thread is ID 1, and the child threads won't have that ID. And it's what wait natively returns when there are no further child processes.

- j

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Node Type: note [id://463922]
[davido]: I'll look into it in a few hours probably.
[davido]: when i do get to that point I think I'll do it in a vm snapshot just in case. :)
[oiskuu]: tye, you were right: loginuid/sessionid are part of task struct if compiled with AUDITSYSCALL. I have some doubts if you should actually depend on that feature.
[Corion]: oiskuu: Depends on what you want to do with that information
[tye]: I'm not depending on that feature. But I could in this environment. I'm using getlogin(). shrug
[Corion]: For benign logging (which user started this DB instance), it's OK
[tye]: We use auditd for security monitoring. So we can rely on auditing being enabled. I'm not sure who would want to not be able to audit. Maybe some VM inside another system with audit?
[SuicideJunkie]: spies would want a system to not be able to audit.

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