Re: Why does getppid() still return old parent pid after setsid()?

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Sujet : Re: Why does getppid() still return old parent pid after setsid()?
De : ldo (at) *nospam* nz.invalid (Lawrence D'Oliveiro)
Groupes : comp.unix.programmer
Date : 09. Nov 2024, 01:07:27
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <vgm93v$3dkuq$4@dont-email.me>
References : 1 2
User-Agent : Pan/0.160 (Toresk; )
On Fri, 8 Nov 2024 15:30:21 -0000 (UTC), Lew Pitcher wrote:

So, while setsid(2) "creates a session and sets the process group ID"
for a process, it does not change the process' parent PID.

It is possible for the parent process to terminate before the child.
The child is then said to be “orphaned”. From this point, normally
getppid() will return 1, the PID of the init process.

However, on Linux, it is possible to specify an alternative “child
subreaper” process, via prctl()
<https://manpages.debian.org/bookworm/manpages-dev/prctl.2.en.html>.
getppid() will then return the ID of this process.

Date Sujet#  Auteur
8 Nov 24 * Why does getppid() still return old parent pid after setsid()?20Muttley
8 Nov 24 +* Re: Why does getppid() still return old parent pid after setsid()?2Lew Pitcher
9 Nov 24 i`- Re: Why does getppid() still return old parent pid after setsid()?1Lawrence D'Oliveiro
9 Nov 24 +* Re: Why does getppid() still return old parent pid after setsid()?12Kenny McCormack
9 Nov 24 i+* Re: Why does getppid() still return old parent pid after setsid()?2Lew Pitcher
9 Nov 24 ii`- Re: Why does getppid() still return old parent pid after setsid()?1Lew Pitcher
11 Nov 24 i+* Re: Why does getppid() still return old parent pid after setsid()?7Muttley
11 Nov 24 ii+- Re: Why does getppid() still return old parent pid after setsid()?1Lew Pitcher
11 Nov 24 ii`* Re: Why does getppid() still return old parent pid after setsid()?5Lawrence D'Oliveiro
12 Nov 24 ii `* Re: Why does getppid() still return old parent pid after setsid()?4Kenny McCormack
13 Nov 24 ii  `* Re: Why does getppid() still return old parent pid after setsid()?3Richard Harnden
13 Nov 24 ii   `* Re: Why does getppid() still return old parent pid after setsid()?2Lew Pitcher
13 Nov 24 ii    `- Re: Why does getppid() still return old parent pid after setsid()?1Richard Harnden
11 Nov 24 i`* Re: Why does getppid() still return old parent pid after setsid()?2Lew Pitcher
11 Nov 24 i `- Re: Why does getppid() still return old parent pid after setsid()?1Kenny McCormack
11 Nov 24 +- Re: Why does getppid() still return old parent pid after setsid()?1Rainer Weikusat
12 Nov 24 +* Re: Why does getppid() still return old parent pid after setsid()?2Geoff Clare
12 Nov 24 i`- Re: Why does getppid() still return old parent pid after setsid()?1Muttley
12 Nov 24 `* Re: Why does getppid() still return old parent pid after setsid()?2Kaz Kylheku
13 Nov 24  `- Re: Why does getppid() still return old parent pid after setsid()?1Muttley

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