On Wed, 15 Dec 2010, Bob Dunlop wrote:
>
> Not a fix but a work around:
>
> > $ ./busybox ash -c 'read MAX </proc/sys/kernel/pid_max; echo $MAX'
> > 3
>
> $ busybox ash -c 'MAX=$(cat /proc/sys/kernel/pid_max) ; echo $MAX'
> 32768
>
>
> Files in /proc are generated on the fly. They can be fussy about how
> they are read.
Yes. Same suggestion as Herbert Xu's, who stated:
'a perfectly adequate work-around in "cat"'
Unfortunately, that work around is neither perfect nor adequate. I'd call
it painful, as:
read MAX </proc/sys/kernel/pid_max
is so much more efficient (about 25x faster, on my box) than:
MAX=$(cat /proc/sys/kernel/pid_max)
I hope you noticed, this is a problem _only_ with /proc files holding
integers >9. No such problems with files containing strings.
Cheers,
--
Cristian
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