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dracut-cpio is a minimal cpio archive creation utility written in Rust. It provides support for a minimal set of features needed to create performant and space-efficient initramfs archives: - "newc" archive format only - reproducible; inode numbers, uid/gid and mtime can be explicitly set - data segment copy-on-write reflinks + using Rust io::copy()'s native copy_file_range() support[1] + optional archive data segment alignment for optimal reflink use[2] - hardlink support - comprehensive tests asserting GNU cpio binary output compatibility 1. Rust io::copy() copy_file_range() https://github.com/rust-lang/rust/pull/75272 2. Data segment alignment We're bending the newc spec a bit to inject zeros after the file path to provide data segment alignment. These zeros are accounted for in the namesize, but some applications may only expect a single zero-terminator (and 4 byte alignment). GNU cpio and Linux initramfs handle this fine as long as PATH_MAX isn't exceeded. Signed-off-by: David Disseldorp <ddiss@suse.de>master
David Disseldorp
3 years ago
committed by
Harald Hoyer
3 changed files with 1740 additions and 0 deletions
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# This file is automatically @generated by Cargo. |
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# It is not intended for manual editing. |
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[[package]] |
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name = "crosvm" |
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version = "0.1.0" |
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[[package]] |
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name = "dracut-cpio" |
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version = "0.1.0" |
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dependencies = [ |
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"crosvm", |
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] |
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[package] |
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name = "dracut-cpio" |
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description = "cpio archive generator for Dracut" |
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authors = ["David Disseldorp"] |
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license = "GPL-2.0" |
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version = "0.1.0" |
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edition = "2018" |
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[dependencies] |
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crosvm = { path = "third_party/crosvm" } |
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# please avoid adding any more dependencies |
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