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[DOC] Clarify default behaviour on uidmap

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Specify that by default if only one of uidmap or gidmap is given, the other one is copied

Co-authored-by: Tom Sweeney <tsweeney@redhat.com>
Signed-off-by: Sergio Oller <sergioller@gmail.com>
This commit is contained in:
Sergio Oller
2023-05-30 11:08:49 +02:00
parent f83ca0490a
commit 18c2a2be87
1 changed files with 5 additions and 0 deletions
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docs/source/markdown/options/uidmap.container.md
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@ -76,6 +76,11 @@ Every additional range is added sequentially afterward:
| 1 | $FIRST_RANGE_ID | $FIRST_RANGE_LENGTH |
| 1+$FIRST_RANGE_LENGTH | $SECOND_RANGE_ID | $SECOND_RANGE_LENGTH|
By default, providing either **--uidmap** or **--gidmap** replaces the
whole mapping. If only one of those two options is given, the other one is
copied by default. If only one value of the two needs to be changed,
both values should be provided.
Even if a user does not have any subordinate UIDs in _/etc/subuid_,
**--uidmap** can be used to map the normal UID of the user to a
container UID by running `podman <<subcommand>> --uidmap $container_uid:0:1 --user $container_uid ...`.