3ff8d0ece4
On FreeBSD, sysctl(KERN_PROC_PATHNAME) returns a null-terminated
string with pathLen including the terminator. This causes Nix to
fail during manual generation with:
error:
… while calling the 'concatStringsSep' builtin
at /nix/var/nix/builds/nix-63232-402489527/source/doc/manual/generate-settings.nix:99:1:
98| in
99| concatStrings (attrValues (mapAttrs (showSetting prefix) settingsInfo))
| ^
100|
error: input string '/nix/store/gq89cj02b5zs67cbd85vzg5cgsgnd8mj-nix-2.31.2/bin/nix␀'
cannot be represented as Nix string because it contains null bytes
The issue occurs because generate-settings.nix reads the nix binary
path from JSON and evaluates it as a Nix string, which cannot contain
null bytes. Normal C++ string operations don't trigger this since they
handle null-terminated strings correctly.
Strip the null terminator on FreeBSD to match other platforms (Linux
uses /proc/self/exe, macOS uses _NSGetExecutablePath).
Credit: @wahjava (FreeBSD ports and Nixpkgs contributor)
|
||
|---|---|---|
| .github | ||
| ci/gha | ||
| contrib | ||
| doc/manual | ||
| maintainers | ||
| misc | ||
| nix-meson-build-support | ||
| packaging | ||
| scripts | ||
| src | ||
| tests | ||
| .clang-format | ||
| .clang-tidy | ||
| .coderabbit.yaml | ||
| .dir-locals.el | ||
| .editorconfig | ||
| .git-blame-ignore-revs | ||
| .gitignore | ||
| .shellcheckrc | ||
| .version | ||
| CITATION.cff | ||
| CONTRIBUTING.md | ||
| COPYING | ||
| default.nix | ||
| docker.nix | ||
| flake.lock | ||
| flake.nix | ||
| HACKING.md | ||
| meson.build | ||
| meson.format | ||
| meson.options | ||
| README.md | ||
| shell.nix | ||
Nix
Nix is a powerful package manager for Linux and other Unix systems that makes package management reliable and reproducible. Please refer to the Nix manual for more details.
Installation and first steps
Visit nix.dev for installation instructions and beginner tutorials.
Full reference documentation can be found in the Nix manual.
Building and developing
Follow instructions in the Nix reference manual to set up a development environment and build Nix from source.
Contributing
Check the contributing guide if you want to get involved with developing Nix.
Additional resources
Nix was created by Eelco Dolstra and developed as the subject of his PhD thesis The Purely Functional Software Deployment Model, published 2006. Today, a world-wide developer community contributes to Nix and the ecosystem that has grown around it.
- The Nix, Nixpkgs, NixOS Community on nixos.org
- Official documentation on nix.dev
- Nixpkgs is the largest, most up-to-date free software repository in the world
- NixOS is a Linux distribution that can be configured fully declaratively
- Discourse
- Matrix: #users:nixos.org for user support and #nix-dev:nixos.org for development
License
Nix is released under the LGPL v2.1.