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Guile hangs on /sys file read.

From: Rob Browning
Subject: Guile hangs on /sys file read.
Date: Fri, 24 Nov 2006 12:20:48 -0800
User-agent: Gnus/5.110006 (No Gnus v0.6) Emacs/21.4 (gnu/linux)


  $ ls -l /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
  -r--r--r-- 1 root root 4096 Nov 24 10:07

  $ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq

This hangs:

  $ guile -c '(call-with-input-file 
"/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq" read)'

Strace shows that the process is hanging in a select.  The same thing
works fine for /proc/loadavg.

I haven't investigated further yet.

Rob Browning
rlb and; previously
GPG starting 2002-11-03 = 14DD 432F AE39 534D B592  F9A0 25C8 D377 8C7E 73A4

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