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I want a simple filesystem in pure C (no FUSE, or anything).

It needs directories, and files that can grow.

Specs of embedded system I want to use it on:

128KB of flash

64KB of RAM

RTOS available for threading, queues, and fixed-size memory allocation

No malloc available.

Note: using a simple read() and write() interface would be nice, rather than direct buffer acces... this would make porting to my board easier.

Note 2: I am looking for a library, not to make a filesystem.

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  • FAT12 is a tiny file system with directories and growable files. Try looking for it's implementation in C. The data-reading part should be included in every boot loader
    – xmojmr
    Commented Nov 24, 2016 at 12:59
  • @xmojmr thanks for the response! I don't want ChaN's library though..
    – user27945
    Commented Nov 24, 2016 at 13:00
  • The linux kernel (www.kernel.org) has C based implementations of many file systems including FAT12/16/32. It has a subfolder named fs (file systems) and a subfolder fat. Some amount of tweaking would be needed to get it to work for you, but it could probably be done.
    – cybernard
    Commented Nov 28, 2016 at 22:42
  • @cybernard Thank you for the suggestion! I'm not a Linux programmer, though, and porting this might be difficult and it might be too big for my project.
    – user27945
    Commented Nov 28, 2016 at 22:53
  • How about lean fs freedos-32.sourceforge.net/lean
    – cybernard
    Commented Nov 28, 2016 at 23:13

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