Messages in this thread | ![/](/images/icornerl.gif) | | From | Bill Davidsen <> | Subject | Re: Interesting race condition... | Date | Tue, 27 Jul 2004 16:40:22 -0400 |
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Rob Landley wrote: > On Friday 23 July 2004 05:01, P. Benie wrote: > >>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. > > > It's expected behavior for PS to show a process's environment variables as > part of its command line?
When piped. For instance ps eaxf does not, while ps eaxf | cat does, at least on my systems. I tried on RHEL AS3.0 thru a four year old version of Slackware, all did the same thing.
-- -bill davidsen (davidsen@tmr.com) "The secret to procrastination is to put things off until the last possible moment - but no longer" -me - 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/
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