Add a RootDirectory API
#54
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cgwalters
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cgwalters
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Jul 15, 2024
Use the API from coreos/cap-std-ext#54 to fix absolute symlinks for `/etc/ostree/auth.json`. cc containers/bootc#679 Signed-off-by: Colin Walters <walters@verbum.org>
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Usage in ostreedev/ostree-rs-ext#650 |
This was referenced Jul 15, 2024
jeckersb
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Jul 16, 2024
Right now cap-std uses `RESOLVE_BENEATH`, not `RESOLVE_IN_ROOT` which means absolute symlinks can't work. It's really handy to use cap-std where we can; I particularly like doing so in unit tests for example. However...we really do need to support absolute symlinks for many cases. Add a handy `RootDirectory` which exposes just a read-only subset of APIs - in particular we basically just want `open()` (and convenience wrappers like `read_to_string()` on this). For other writing cases right now, one needs to construct a regular `Dir`. Note that unlike the rest of cap-std, absolutely¹ no attempt is made to handle cases where `openat2` isn't accessible (non-Linux, cases where the kernel is too old, etc.) ¹ Pun not intended Signed-off-by: Colin Walters <walters@verbum.org>
jeckersb
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Jul 16, 2024
cgwalters
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Jul 16, 2024
Use the API from coreos/cap-std-ext#54 to fix absolute symlinks for `/etc/ostree/auth.json`. cc containers/bootc#679 Signed-off-by: Colin Walters <walters@verbum.org>
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Right now cap-std uses
RESOLVE_BENEATH, notRESOLVE_IN_ROOTwhich means absolute symlinks can't work.It's really handy to use cap-std where we can; I particularly like doing so in unit tests for example.
However...we really do need to support absolute
symlinks for many cases. Add a handy
RootDirectorywhich exposes just a read-only subset of APIs - in particular we basically just wantopen()(and convenience wrappers likeread_to_string()on this).For other writing cases right now, one needs to construct a regular
Dir.Note that unlike the rest of cap-std, absolutely¹ no attempt is made to handle cases where
openat2isn't accessible (non-Linux, cases where the kernel is too old, etc.)¹ Pun not intended