Re: Bug in su or mc ?
On Wed, 20 May 1998, Ionut Borcoman at musa wrote:
> Hi,
>
> If I do the followings in X:
>
> 1. start an xterm;
> 2. in xterm give an su
> 3. as root (under su) start mc
> 4. close the xterm
>
> I end up with a 100% CPU usage, even when I do nothing. If I give top, I
> discover that mc is still running and eating all the CPU power (say 98
<snip>
This isn't the only thing that does this - try runing an xterm, opening
elvis (vi - not vim), and then killing the xterm (using xkill, closing the
window manager, or other method..) You will get a runaway vi taking up
all your spare clock cycles. Not good.
I think this is because these programs ignore hangup signals, and so when
the shell dies, the hangup doesn't kill the process, even though it loses
it's standard input - hence it 'running away' as it tries to read from an
empty file stream.
If anyone knows a simple way to prevent these problems - or if it has been
classified as a bug - it'd be nice to know.
Ta,
Chris
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