safeio

An OTP library for checking that specific directories are safe to use.

This project is the result of problems with handling broken NFS mounts.

Our application would regularily use filelib:is_regular/1 with a path that is in an NFS mounted directory.

The problem is, that and whenever the mount point gets stuck, e.g. because of an NFS-server outage or a network problem, file operations, i.e. calls to file and filelib modules block, as soon as the first element is mounted, even if paths are accessed, that arn't in the broken NFS directory.

This library aims to provide a workaround for this problem by providing a functions that quickly and safely checks if a path is accessable without going through file or filelib.

Build

$ rebar3 compile

Usage

To check if a file is a regular file, use safeio:is_regular/2:

safeio:is_regular("/mnt/nfs-audio", "en/wav-g711a/test.wav"),
...