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mke2fs: uid and gid of the copied inodes when using -d option #126

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@dxdxdt dxdxdt commented Oct 25, 2022

I've added MKE2FS_POPULATE_UID and MKE2FS_POPULATE_GID env vars for use with -d option so that I don't have to use root privileges to change the uid and gid when the contents of source root directory are not owned by root. mksquashfs sets the uid and gid to 0 by default. I wanted this feature in mke2fs as well.

I doubt the usefulness of these env vars as it seems no one really felt the need to implement these. I just wanted to put it out here so that someone can use my work.

- Add MKE2FS_POPULATE_UID and MKE2FS_POPULATE_GID env vars for use
  with -d option
- To implement mksquashfs -all-root option equivalent: the env vars
  will come in handy when creating a file system without root
  privileges
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zokier commented Feb 19, 2024

Just for reference, e2fsdroid has this piece of code dealing with uids/gids https://github.com/tytso/e2fsprogs/blob/master/contrib/android/perms.c#L134-L156

Not sure why they opted to do it in a post-processing step instead of fs_callback during population. In any case, it might make sense to align these two similar features?

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