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Add support for setting UID/GID through mount options #62

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Add support for setting UID/GID through mount options #62

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a-wai
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@a-wai a-wai commented Sep 12, 2018

Hi,

The use-case is the following one:

  • Mount an APFS read-only
  • Create and overlayfs with the lower dir on the APFS directory and the upper dir on a user-writable partition
  • The user cannot create a file in a subdirectory of the overlayfs as it is owned by root on the original filesystem with 755 permissions

Setting UID/GID for the whole APFS filesystem enables regular users writing to the overlayfs.

This patch solves issue #61

a-wai and others added 2 commits September 12, 2018 17:46
Even with read-only support, it may be useful to set the filesystem
default UID/GID to an arbitrary value.

With this patch, the user can use the "uid=N", "gid=N", "user_id=N" or
"group_id=N" options to set the user and group IDs for the whole
filesystem.

Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
@a-wai
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a-wai commented Oct 11, 2018

Merged master to solve conflicts, feel free to let me know if you have any comments regarding this PR.

st.st_uid = geteuid();
st.st_gid = getegid();
st.st_uid = g_uid;
st.st_uid = g_gid;
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That can't be right. Did you mean to set st.st_gid?

@nros
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nros commented Jun 22, 2022

The PR seems already merged with commit d9ae52c
So, this can be closed?

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3 participants