Re: unique IDs for connections to ipsvd programs

Lasse Kliemann <[email protected]>
Newsgroups gmane.comp.misc.pape.general
Message-ID <[email protected]>
* Message by -Charlie Brady- from Mon 2007-11-12:
>
> On Thu, 8 Nov 2007, Lasse Kliemann wrote:
>
>> * Message by -Charlie Brady- from Wed 2007-11-07:
>>
>>> You don't need a modification to tcpsvd to do what you want, however. You
>>> can write 'uuid', which generates a uuid, puts in in an environment
>>> variable, prints a message, ...
>>
>> That's the problem. With many concurrent connections, these outputs will 
>> be
>> garbled.
>
> In what sense would they be/are they garbled?

Example:

tcpsvd 0 2000 sh -c 'echo -n "$$: " >&2 ; uuidgen >&2'

Now I start hammering this service with requests. 
Here is what can happen to the output:

9804: b0861e71-8143-4d43-851d-6df5acc8fb44
9809: c07a8d79-aa10-43fd-8104-1626e9dad863
9810: 9814: fb968e73-5765-49df-8353-02ea0cd1d812
3646ac5e-c147-44ca-abcb-a5a84e087c0e
9818: f0312d9d-a83e-4497-b80c-4ea3537c5a6b
9819: 8dbad28d-0452-4870-a573-69eb164989c8

(...)
16061: 8a656cb1-252c-40fa-b03f-9009f5c4fe0b
16039: c097d2cd-ad20-45de-9b17-1b79bec42b44
16071: 7a2c4862-8523-4f41-bb6f-a8fb848f794a
16073: 16075: ee4b9e0c-90bb-4b58-aa5b-89620c4545c6
16076: c05f9189-3c63-46e9-bca3-1d1a04c0eb02

(...)
18256: 0dcd9e96-4e2e-4ed3-848b-73b11907dc80
18257: 18258: 18259: 4392b34a-efc5-4e0a-9972-f603aa7b477b
18311: aba1cc51-fa18-4b8a-bba0-fee4e5b3b769
18312: 09011111-e7dd-4516-8d2a-291efcc3360c
18313: 14dc8f53-4780-4beb-9e13-88685cf20a69
32f96a76-92f1-4d58-b476-a4ea64ac3275
c0b637ce-b9f3-4236-a3de-2ac8b4e7f65f
d7cc801a-5582-467e-b147-71e4f8a61b57
18232: d328c021-8625-422e-bf5b-6b0efdf5fe42
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