Re: static or stuff like that

[wwp <subscript@free.fr>]

Hi Glynn,

On Mon, 29 Apr 2002 10:48:41 +0100 Glynn Clements
<glynn.clements@virgin.net> wrote:

> > > > I want to control whether a process is already running or not,
> > > > and i don't know how without using some kind of lock-files
> > > 
> > > You can scan the files under /proc/<pid> to obtain details about
> > > which processes are running. E.g. /proc/<pid>/exe is a symlink to
> > > the program which process <pid> is executing.
> > 
> > Is /proc always available?
> 
> It's possible that /proc isn't mounted but, if it isn't, many OS
> features won't work (e.g. modprobe). Unless you're targeting a very
> minimal system (e.g. embedded systems), or writing code which will run
> early in the boot sequence, it's safe to assume that /proc will be
> available.
[snip]

Thanx for your answers.
I've also seen software using unix domain socket to prohibit duplicate
launch of a program on a POSIX system.
What do you think of this method, Glynn?


Regards,

-- 
wwp