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* [http://www.gnu.org/software/cpio/manual/index.html GNU cpio manual]
* [http://www.gnu.org/software/cpio/manual/index.html GNU cpio manual]
* [http://rightsock.com/~kjw/Ramblings/tar_v_cpio.html tar vs. cpio]
* [http://rightsock.com/~kjw/Ramblings/tar_v_cpio.html tar vs. cpio]
* [https://web.archive.org/web/20190809160054/http://www.forensicswiki.org/wiki/Cpio ForensicsWiki entry] (no useful detail)

Latest revision as of 15:23, 1 November 2020

File Format
Name cpio
Extension(s) .cpio
MIME Type(s) application/x-cpio
PRONOM fmt/635

cpio is a non-compressed file archive format for Unix-style systems. It was originally intended for tape archiving, similar to the Tape Archive (tar) format.


[edit] Examples

To extract files, using the command line utility:

 $ cpio -idmv -I example.cpio

To list files:

 $ cpio -it -I example.cpio

[edit] Identification

A cpio archive begins with one of the following signatures:

  • 0x71 0xC7
  • 0xC7 0x71
  • '0' '7' '0' '7'

Be aware that there are afio extensions to cpio format that are not supported by most cpio utilities. For one thing, if most of the filenames end in ".z", it's probably a compressed afio archive.

[edit] Specifications

[edit] Software

[edit] Sample files

[edit] Other links

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