Bug 13876 - busybox cpio can't generate reproducible archives
Summary: busybox cpio can't generate reproducible archives
Status: NEW
Alias: None
Product: Busybox
Classification: Unclassified
Component: Other (show other bugs)
Version: unspecified
Hardware: All Linux
: P5 normal
Target Milestone: ---
Assignee: unassigned
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2021-06-27 13:34 UTC by kpcyrd
Modified: 2021-06-27 13:34 UTC (History)
1 user (show)

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busyboxconfig (31.12 KB, text/plain)
2021-06-27 13:34 UTC, kpcyrd 		Details
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Description kpcyrd 2021-06-27 13:34:55 UTC 
Created attachment 9021 [details]
busyboxconfig

Hello!

I'm working on reproducible alpine images and after a bit of debugging I noticed the alpine image contains the inode numbers of files in my build folder.

https://twitter.com/sn0int/status/1408961464401121281

This is a problem because, naturally, those are going to be basically random and there's no way for me to normalize them. gnu cpio has a `--reproducible` flag that acts as an alias for `--ignore-devno --renumber-inodes`, I'm not sure yet if I need `--ignore-devno` as well, but I definitely need `--renumber-inodes` to build deterministic images. :)

Besides the inode numbers the alpine initramfs is already fully reproducible with the patches I've submitted to alpine.

Thanks!