cafkafk/nixpkgs
cafkafk/nixpkgs
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions 2
nixpkgs/doc/builders/packages/etc-files.section.md

19 lines
1.3 KiB
Markdown
Raw Normal View History

glibc: add dependency on netbase /etc/protocols Add an explicit dependency on netbase for /etc/protocols Certain functions in glibc look for files present in /etc such as getprotobyname which reads /etc/protocols. If you are using Nix over a Linux installation, this file may not be present, and therefore it will cause errors. - add netbase as a new package in nixpks - add a dependency in glibc on it using postPatchPhase and substitute the path Fixes #124401
2021-09-13 04:04:10 +02:00
# /etc files {#etc}
Certain calls in glibc require access to runtime files found in /etc such as `/etc/protocols` or `/etc/services` -- [getprotobyname](https://linux.die.net/man/3/getprotobyname) is one such function.
On non-NixOS distributions these files are typically provided by packages (i.e. [netbase](https://packages.debian.org/sid/netbase)) if not already pre-installed in your distribution. This can cause non-reproducibility for code if they rely on these files being present.
If [iana-etc](https://hydra.nixos.org/job/nixos/trunk-combined/nixpkgs.iana-etc.x86_64-linux) is part of your _buildInputs_ then it will set the environment varaibles `NIX_ETC_PROTOCOLS` and `NIX_ETC_SERVICES` to the corresponding files in the package through a _setup-hook_.
nixpkgs/doc/glibc: better glibc link also replace unicode symbol in case some environment cannot reproduce the encoding or font symbol.
2021-09-22 20:28:58 +02:00
glibc: add dependency on netbase /etc/protocols Add an explicit dependency on netbase for /etc/protocols Certain functions in glibc look for files present in /etc such as getprotobyname which reads /etc/protocols. If you are using Nix over a Linux installation, this file may not be present, and therefore it will cause errors. - add netbase as a new package in nixpks - add a dependency in glibc on it using postPatchPhase and substitute the path Fixes #124401
2021-09-13 04:04:10 +02:00
```bash
nixpkgs/doc/glibc: better glibc link also replace unicode symbol in case some environment cannot reproduce the encoding or font symbol.
2021-09-22 20:28:58 +02:00
> nix-shell -p iana-etc
glibc: add dependency on netbase /etc/protocols Add an explicit dependency on netbase for /etc/protocols Certain functions in glibc look for files present in /etc such as getprotobyname which reads /etc/protocols. If you are using Nix over a Linux installation, this file may not be present, and therefore it will cause errors. - add netbase as a new package in nixpks - add a dependency in glibc on it using postPatchPhase and substitute the path Fixes #124401
2021-09-13 04:04:10 +02:00
[nix-shell:~]$ env | grep NIX_ETC
NIX_ETC_SERVICES=/nix/store/aj866hr8fad8flnggwdhrldm0g799ccz-iana-etc-20210225/etc/services
NIX_ETC_PROTOCOLS=/nix/store/aj866hr8fad8flnggwdhrldm0g799ccz-iana-etc-20210225/etc/protocols
```
nixpkgs/doc/glibc: better glibc link also replace unicode symbol in case some environment cannot reproduce the encoding or font symbol.
2021-09-22 20:28:58 +02:00
Nixpkg's version of [glibc](https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/libraries/glibc/default.nix) has been patched to check for the existence of these environment variables. If the environment variable are *not set*, then it will attempt to find the files at the default location within _/etc_.
Reference in a new issue Copy permalink