Messages in this thread | | | Date | Fri, 23 Jul 2004 11:01:07 +0100 (BST) | From | "P. Benie" <> | Subject | Re: Interesting race condition... |
| |
On Fri, 23 Jul 2004, Rob Landley wrote:
> I just saw a funky thing. Here's the cut and past from the xterm... > > [root@(none) root]# ps ax | grep hack > 9964 pts/1 R 0:00 grep hack HOSTNAME= SHELL=/bin/bash TERM=xterm HISTSIZE=1000 USER=root LS_COLORS=no=00:fi=00:di=00;34:ln=00;36:pi=40;33:so=00;35:bd=40;33;01:cd=40;33;01:or=01;05;37;41:mi=01;05;37;41:ex=00;32:*.cmd=00;32:*.exe=00;32:*.com=00;32:*.btm=00;32:*.bat=00;32:*.sh=00;32:*.csh=00;32:*.tar=00;31:*.tgz= > [root@(none) root]# ps ax | grep hack > 9966 pts/1 S 0:00 grep hack > > Seems like some kind of race condition, dunno if it's in Fedore Core 1's ps > or the 2.6.7 kernel or what...
The race is in the shell's pipeline - the processes don't start at exactly the same time, and sometimes ps has completed before the shell has started grep. This is the expected behaviour.
Peter - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |