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| author | Michael Kerrisk <mtk.manpages@gmail.com> | 2013-02-28 11:53:18 +0100 |
|---|---|---|
| committer | Michael Kerrisk <mtk.manpages@gmail.com> | 2014-09-13 20:16:00 -0700 |
| commit | 6e377abf9c61b4fd1605fa9528b68c380de5d5bf (patch) | |
| tree | f23b22323826e60b4c2dc76828d2a2085b0315ad /man7/pid_namespaces.7 | |
| parent | 7a9ab60197d2678dcdd25a480829e29dfe8b3649 (diff) | |
| download | man-pages-6e377abf9c61b4fd1605fa9528b68c380de5d5bf.tar.gz | |
pid_namespaces.7: Parent process relationships mirror parent PID namespace relationships
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Diffstat (limited to 'man7/pid_namespaces.7')
| -rw-r--r-- | man7/pid_namespaces.7 | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/man7/pid_namespaces.7 b/man7/pid_namespaces.7 index 042bd4f678..5e49633cc2 100644 --- a/man7/pid_namespaces.7 +++ b/man7/pid_namespaces.7 @@ -182,9 +182,14 @@ because doing so would change the caller's idea of its own PID (as reported by .BR getpid ()), which would break many applications and libraries. + To put things another way: a process's PID namespace membership is determined when the process is created and cannot be changed thereafter. +Among other things, this means that the parental relationship +between processes mirrors the parental between PID namespaces: +the parent of a process is either in the same namespace +or resides in the immediate parent PID namespace. Every thread in a process must be in the same PID namespace. For this reason, the two following call sequences will fail: |