How do I check if a pid is running?

[Gustavo Niemeyer]

> >>> def pid_exists(pid):
> ...     try:
> ...         os.kill(pid, 0)
> ...         return 1
> ...     except OSError, err:
> ...         return err.errno == errno.EPERM
[...]
> There may be better ways than this...

I wouldn't classify it as better, but the proc filesystem
usually has directories named with pid numbers. This should
work if you have such proc filesystem (remember, not portable
at all):

def pid_exists(pid):
    return os.path.isdir("/proc/"+str(pid))

-- 
Gustavo Niemeyer

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