update-users-groups.pl fails if /var/lib/nixos/*-map malformed

[elitak]

Issue description

I was missing users/groups that were in use by services I'd activated. It took considerable digging to uncover that the update-users-groups.pl script, part of system profile activation, was failing to update /etc/passwd, /etc/group.

Steps to reproduce

as root:

1. echo | tee /var/lib/nixos/uid-map | tee /var/lib/nixos/gid-map
2. /nix/var/nix/profiles/system/activate

update-users-groups.pl should handle any exception in parsing these files and replace them with an empty map, I think? I've no idea how my /var/lib/nixos files got damage (they contained only whitespace).

Technical details

• Nix version: nix-env (Nix) 1.11.11
• Nixpkgs version: 17.09.git.82dc4fa (Hummingbird)
• System: "17.09.git.82dc4fa671"
• Sandboxing enabled: build-use-sandbox = false

[stale]

Thank you for your contributions.

This has been automatically marked as stale because it has had no activity for 180 days.

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[davidak]

This still happens.

[stale]

I marked this as stale due to inactivity. → More info