Avoid race condition with Popen.send_signal

[Cameron Simpson]

On 02Jan2012 20:31, Devin Jeanpierre <jeanpierreda at gmail.com> wrote:
| > I think that catching the exception is probably the most Pythonic way.
| 
| It's the only correct way.

Indeed, but be precise - chek that it _is_ error 3, or more portably,
errno.ESRCH. POSIX probably mandates that that is a 3, but the symbol
should track the local system if it differs. Example:

  import errno
  ...
  try:
    ...signal...
  except OSError, e:
    if e.errno == errno.ESRCH:
      pass      # or maybe an info log message
    else:
      raise     # something else wrong - raise exception anyway

Cheers,
-- 
Cameron Simpson <cs at zip.com.au> DoD#743
http://www.cskk.ezoshosting.com/cs/

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