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Mount with specific owner #150

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BigmenPixel0 opened this issue Jan 23, 2022 · 1 comment
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Mount with specific owner #150

BigmenPixel0 opened this issue Jan 23, 2022 · 1 comment
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@BigmenPixel0
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Can I mount /var/cache/my_folder with specific uid and gid?

[zram5]
zram-size = ram
compression-algorithm = zstd
options = nosuid,nodev
fs-type = ext4
mount-point = /var/cache/my_folder
@nabijaczleweli nabijaczleweli added the question Further information is requested label Jan 23, 2022
@nabijaczleweli
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The hack described in the README https://github.com/systemd/zram-generator#mount-points applies, just do chown instead of/in addition to chmod (I think that's what you're asking, per analogiam w/tmpfs).

Closing as duplicate of #146. I should really polish the half of a systemd patch I have for this.

@nabijaczleweli nabijaczleweli mentioned this issue Mar 28, 2022
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karelzak pushed a commit to util-linux/util-linux that referenced this issue Apr 21, 2022
@nabijaczleweli @karelzak
libmount: accept X-mount.{owner,group,mode}=
722c969 
Which take a user, group, and mode, respectively, and set them on the
target after mounting

This is vaguely similar to tmpfs(5)'s [ug]id= and mode= options,
but we POSIX-parse the user- and group names

Oft requested in systemd/zram-generator, since a common use-case
is to use it to create /tmp or an equivalent directory that needs
to be a=rwx,o+t (or a user's private temp that needs to be owned
by them) ‒ this is impossible without terrible hacks, cf.
systemd/zram-generator#150,
systemd/zram-generator#146, &c.

This started off as a Set{User,Group,Mode}= systemd mount unit,
but was poetterung into libmount options:
systemd/systemd#22889

Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Signed-off-by: Karel Zak <kzak@redhat.com>
nabijaczleweli added a commit to nabijaczleweli/systemd-zram-generator that referenced this issue May 17, 2022
@nabijaczleweli
Mention X-mount.{owner,group,mode}= in README
f879da6 
(Will be) available since 2.39, merged in
  https://git.kernel.org/pub/scm/utils/util-linux/util-linux.git/commit/?id=24e896c1400c2328b8bdffde674a3d74429acdf1^^
  https://lore.kernel.org/util-linux/20220421101949.4zc7kojyujdiv2lb@ws.net.home/

Ref: systemd#150, systemd#146
keszybz pushed a commit that referenced this issue May 17, 2022
@nabijaczleweli @keszybz
Mention X-mount.{owner,group,mode}= in README
1c0aa9c 
(Will be) available since 2.39, merged in
  https://git.kernel.org/pub/scm/utils/util-linux/util-linux.git/commit/?id=24e896c1400c2328b8bdffde674a3d74429acdf1^^
  https://lore.kernel.org/util-linux/20220421101949.4zc7kojyujdiv2lb@ws.net.home/

Ref: #150, #146
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@nabijaczleweli @BigmenPixel0