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Switch off HAVE_SAVED_UIDS since it activates a code path for temporary privilege dropping which does not work on NixOS. Vixie-cron's sources ship with two implementations. Unfortunately, the one activated by HAVE_SAVED_UIDS (using setuid()) does not work on NixOS. Saved UIDs work only if the program which is using them has the setuid bit set on its own executable, not if called from a setuid wrapper (as we do it in NixOS). The other implementation (using setreuid()) works without problems. Quote from <http://stackoverflow.com/questions/8499296/realuid-saved-uid-effective-uid-whats-going-on>: If you're euid is root and you change the uid, the privileges gets dropped permanently.If effective user id is not root then saved user id is never touched and you can regain the root privilege back anytime you want in your program. Also extend the default PATH with NixOS-specific bin directories as vixie-cron's default is not really usable on NixOS. Re #16518 Closes #16522
Nixpkgs is a collection of packages for the Nix package manager. It is periodically built and tested by the hydra build daemon as so-called channels. To get channel information via git, add nixpkgs-channels as a remote:
% git remote add channels git://github.com/NixOS/nixpkgs-channels.git
For stability and maximum binary package support, it is recommended to maintain
custom changes on top of one of the channels, e.g. nixos-16.03 for the latest
release and nixos-unstable for the latest successful build of master:
% git remote update channels
% git rebase channels/nixos-16.03
For pull-requests, please rebase onto nixpkgs master.
NixOS linux distribution source code is located inside
nixos/ folder.
- NixOS installation instructions
- Documentation (Nix Expression Language chapter)
- Manual (How to write packages for Nix)
- Manual (NixOS)
- Nix Wiki
- Continuous package builds for unstable/master
- Continuous package builds for 16.03 release
- Tests for unstable/master
- Tests for 16.03 release
Communication: