| Message ID | 20220205222331.3432353-1-arnout@mind.be |
|---|---|
| State | Accepted |
| Headers | show |
| Series | docs/manuali/makeusers-syntax.txt: add caveat for upgrading | expand |
Arnout, All, Title: s/manuali/manual/ On 2022-02-05 23:23 +0100, Arnout Vandecappelle (Essensium/Mind) spake thusly: > With the change of the range of UIDs that is generated from the > automatic ID (-1), it became apparent that there is a potential problem > with these automatic IDs when upgrading: they may have changed, which > means that persistent files that exist outside of the rootfs suddenly > have a different owner. > > Add a caveat section to the manual, as well as an explanation of how to > work around the problem. > > Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> > --- > docs/manual/makeusers-syntax.txt | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/docs/manual/makeusers-syntax.txt b/docs/manual/makeusers-syntax.txt > index 3d1013f447..cebc6240ae 100644 > --- a/docs/manual/makeusers-syntax.txt > +++ b/docs/manual/makeusers-syntax.txt > @@ -90,3 +90,17 @@ This will create this user: > - +shell+ is: +/bin/sh+ > - +test+ is not a member of any additional +groups+ > - +comment+ is: +Test user+ > + > + > +=== Caveat when updating Buildroot I changed that to: Caveat with automatic UIDs and GIDs (because that's the real cause). > + > +When updating buildroot or when packages are added or removed to/from > +the configuration, it is possible that the automatic UIDs and GIDs are > +changed. This can be a problem if persistent files were created with > +that user or group: after upgrade, they will suddenly have a different > +owner. > + > +Therefore, it is advisable to perpetuate the automatic IDs. This can be > +done either by adding a users table with the generated IDs. It is only 'either' is spurious here, I think, so I dropped it. Applied to master, thanks. Regards, Yann E. MORIN. > +needed to do this for UIDs that actually create persistent files, e.g. > +database. > -- > 2.34.1 > > _______________________________________________ > buildroot mailing list > buildroot@buildroot.org > https://lists.buildroot.org/mailman/listinfo/buildroot
>>>>> "Arnout" == Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> writes: > With the change of the range of UIDs that is generated from the > automatic ID (-1), it became apparent that there is a potential problem > with these automatic IDs when upgrading: they may have changed, which > means that persistent files that exist outside of the rootfs suddenly > have a different owner. > Add a caveat section to the manual, as well as an explanation of how to > work around the problem. > Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> Committed to 2022.02.x, thanks.
diff --git a/docs/manual/makeusers-syntax.txt b/docs/manual/makeusers-syntax.txt index 3d1013f447..cebc6240ae 100644 --- a/docs/manual/makeusers-syntax.txt +++ b/docs/manual/makeusers-syntax.txt @@ -90,3 +90,17 @@ This will create this user: - +shell+ is: +/bin/sh+ - +test+ is not a member of any additional +groups+ - +comment+ is: +Test user+ + + +=== Caveat when updating Buildroot + +When updating buildroot or when packages are added or removed to/from +the configuration, it is possible that the automatic UIDs and GIDs are +changed. This can be a problem if persistent files were created with +that user or group: after upgrade, they will suddenly have a different +owner. + +Therefore, it is advisable to perpetuate the automatic IDs. This can be +done either by adding a users table with the generated IDs. It is only +needed to do this for UIDs that actually create persistent files, e.g. +database.
With the change of the range of UIDs that is generated from the automatic ID (-1), it became apparent that there is a potential problem with these automatic IDs when upgrading: they may have changed, which means that persistent files that exist outside of the rootfs suddenly have a different owner. Add a caveat section to the manual, as well as an explanation of how to work around the problem. Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> --- docs/manual/makeusers-syntax.txt | 14 ++++++++++++++ 1 file changed, 14 insertions(+)