LinuxJournal.com: The Linux /proc Filesystem as a Programmers’ Tool

“Before we begin to talk about the proc filesystem as a
programming facility, we need need to establish what it actually
is.

“The proc filesystem is a pseudo-filesystem rooted at /proc that
contains user-accessible objects that pertain to the runtime state
of the kernel and, by extension, the executing processes that run
on top of it…”

Complete
Story