[Buildroot] [Bug 9826] New: post-build scritp - symlinks created in post-build script are overwritten after exit of the script

[Buildroot] [Bug 9826] New: post-build scritp - symlinks created in post-build script are overwritten after exit of the script

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=9826

            Bug ID: 9826
           Summary: post-build scritp - symlinks created in post-build
                    script are overwritten after exit of the script
           Product: buildroot
           Version: 2017.02
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: Other
          Assignee: unassigned at buildroot.uclibc.org
          Reporter: timo.valimaki at sensoan.com
                CC: buildroot at uclibc.org
  Target Milestone: ---

I'm trying to symlink  /etc/group, /etc/passwd and /etc/shadow to RW partition,
in my case to /data/etc (rootfs-overlay).


I created a post-build that moves above files to /data/etc/ directory and
creates symlinks pointing to the moved files. When I'm pausing my post-build
script just before the exit everything is looking fine.

/output/target:

lrwxrwxrwx  1 timo timo    17 huhti 20 12:24 group -> ../data/etc/group
lrwxrwxrwx  1 timo timo    18 huhti 20 12:24 passwd -> ../data/etc/passwd
lrwxrwxrwx  1 timo timo    18 huhti 20 12:24 shadow -> ../data/etc/shadow

But when the Buildroot build is finished the above symlinks are overwritten
-rw-r--r--  1 timo timo   320 huhti 20 12:29 group
-rw-r--r--  1 timo timo   389 huhti 20 12:29 passwd
-rw-------  1 timo timo   291 huhti 20 12:29 shadow

Q: Is this as specified or a bug?
Q: If as specified, what is correct way to symlink above files?

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[Buildroot] [Bug 9826] post-build scritp - symlinks created in post-build script are overwritten after exit of the script

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=9826

Yann E. MORIN <yann.morin.1998@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |yann.morin.1998 at free.fr

--- Comment #1 from Yann E. MORIN <yann.morin.1998@free.fr> ---
Timo,

This is (somewhat) expected. When creating the filsystem images,
there is a part creating the passwd, groups and shadow (and possibly,
gshadow) files from the setting in Buildroot.

This will forcibly create files (AFAIR).

So, what you want to provide is probably a "fakeroot" script. This
will be called after the passwd, group and shadow files are created,
but before the images are assembled.

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[Buildroot] [Bug 9826] post-build scritp - symlinks created in post-build script are overwritten after exit of the script

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=9826

Timo V?lim?ki <timo.valimaki@sensoan.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |INVALID
             Status|NEW                         |RESOLVED

--- Comment #2 from Timo V?lim?ki <timo.valimaki@sensoan.com> ---
Thanks.

I have totally missed the fakeroot script - perhaps I have just skipped it as
didn't understood when to use it.

I moved /etc/group, /etc/passwd and /etc/shadow handling from post-build script
to fakeroot script.  Result: works as it should be.

I mark bug resolved as invalid.

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