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From: Richard Harnden <richard.nospam@gmail.invalid>
Newsgroups: comp.unix.programmer
Subject: Re: Why does getppid() still return old parent pid after setsid()?
Date: Wed, 13 Nov 2024 13:38:58 +0000
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On 12/11/2024 12:15, Kenny McCormack wrote:
> In article <vgtr3i$15srv$2@dont-email.me>,
> Lawrence D'Oliveiro  <ldo@nz.invalid> wrote:
>> On Mon, 11 Nov 2024 10:02:45 -0000 (UTC), Muttley wrote:
>>
>>> can't help thinking they should be a single shot OS call to completely
>>> seperate the child from parent.
>>
>> I guess its not that important.
> 
> It *is* "that important".  And daemon(3) fills the role.
> 
> However, it may be true that it doesn't fully fill it - and maybe that it
> should also do the "double fork".
> 

Should it be: parent fork, child setsid, child fork, grandchild exec
or: parent fork, child fork, grandchild setsid, grandchild exec

?