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I: coreutils tests/misc/nproc-avail fails on GNU/Linux without /proc and


From: Dmitry V. Levin
Subject: I: coreutils tests/misc/nproc-avail fails on GNU/Linux without /proc and /sys mounted
Date: Sun, 10 Jan 2010 02:32:46 +0300

Hi,

The recently introduced nproc utility outputs wrong result when run in
--all mode inside a /proc-less /sys-less GNU/Linux chroot on a system
with several CPUs.  In this environment, "nproc --all" always outputs 1
while plain "nproc" outputs correct number of available CPUs.
The underlying num_processors() function from gnulib relies on
sysconf (_SC_NPROCESSORS_CONF) which always return 1 when neither /sys
nor /proc is mounted.

I'm not sure whether this limitation is unavoidable (and have to be
documented) or it should be treated as a bug.  In the first case,
tests/misc/nproc-avail also needs to be adjusted to call skip_test_
when the OS is GNU/Linux and neither /sys nor /proc is mounted.


-- 
ldv

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