Feature request: Implement System Variables TZ, UID, GID, and UMASK #53

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saavagebueno · 2025-11-20T04:19:26-05:00

saavagebueno commented

2025-11-20 04:19:26 -05:00

Originally created by @JesterEE on GitHub (Jul 25, 2020).

Originally assigned to: @qdm12 on GitHub.

What's the feature?
Pass and respect the system variables: TZ, UID, GID, and UMASK
Why do you need this feature?
Keep the host file permission nice and clean when operating docker as an alternate user.
Extra information?
Similar to what is done by Linuxserver.io in their docker images (and what is done in the Gluetun docker).

Originally created by @JesterEE on GitHub (Jul 25, 2020). Originally assigned to: @qdm12 on GitHub. 1. What's the feature? Pass and respect the system variables: TZ, UID, GID, and UMASK 2. Why do you need this feature? Keep the host file permission nice and clean when operating docker as an alternate user. 3. Extra information? Similar to what is done by Linuxserver.io in their docker images (and what is done in the Gluetun docker).

saavagebueno closed this issue

2025-11-20 04:19:26 -05:00

saavagebueno commented

2025-11-20 04:19:26 -05:00

@qdm12 commented on GitHub (Jul 25, 2020):

Hello!

For UID, GID and UMASK, I don't think that's possible because some files built-in the image are already owned by 1000:1000, and it's not possible to change their ownership at runtime. The only way would be to rebuild the image but that's more trouble.

For TZ i didn't document it but it should already work, for example TZ=America/Montreal. Let's keep it opened so I document it.

@qdm12 commented on GitHub (Jul 25, 2020): Hello! For UID, GID and UMASK, I don't think that's possible because some files built-in the image are already owned by `1000:1000`, and it's not possible to change their ownership at runtime. The only way would be to rebuild the image but that's more trouble. For `TZ` i didn't document it but it should already work, for example `TZ=America/Montreal`. Let's keep it opened so I document it.

saavagebueno referenced this issue

2025-11-20 04:25:24 -05:00

[PR #71] [MERGED] Cloudflare: get identifier automatically and supports ipv6 #602

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Reference: starred/ddns-updater#53