libsysfs2 2.1.0-6 (i386 binary) in ubuntu lucid

 Sysfs is a virtual file system in Linux kernel 2.5+ that provides a
 tree of system devices. libsysfs provides a stable programming
 interface to sysfs and eases querying system devices and their
 attributes.
 .
 The package sysfsutils contains frontend programs that use this
 library. Development files and C examples are provided by the package
 libsysfs-dev.