(Clojure newbie) On my linux machine, slurping /proc/cpuinfo raises an error: user=> (slurp /proc/cpuinfo)

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Editorial Team

Asked: May 28, 20262026-05-28T06:41:26+00:00 2026-05-28T06:41:26+00:00

(Clojure newbie)

On my linux machine, slurping /proc/cpuinfo raises an error:

user=> (slurp "/proc/cpuinfo")
java.io.IOException: Invalid argument (NO_SOURCE_FILE:0)

Anybody knows why that is? (is the /proc filesystem some kind of second-class citizen in Java?)

Edit: the following code, adapted from nakkaya.com, works flawlessly:

(with-open [rdr (java.io.BufferedReader. 
             (java.io.FileReader. "/proc/cpuinfo"))]
   (let [seq (line-seq rdr)]
   (apply print seq)))

I wonder why this difference ?

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Editorial Team · Answer 1 · 2026-05-28T06:41:26+00:00

Editorial Team

I’ve had a similar problem with files in /proc. The solution is simple though:

(slurp (java.io.FileReader. "/proc/cpuinfo"))

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