New submission from Marc Liyanage:
I'm running Python 2.7 in a sandboxed OS X app. There are restrictions on the
naming of POSIX semaphores when running in the sandbox. Specifically, there is
a mandatory prefix.
I would like the ability to inject this prefix into the part of the
multiprocessing module that creates the semaphore, perhaps by way of an
environment variable.
I see that this is how the module generates the semaphore name:
PyOS_snprintf(buffer, sizeof(buffer), "/mp%ld-%d", (long)getpid(),
counter++);
Apple's documentation about the restrictions are here:
https://developer.apple.com/library/mac/documentation/security/conceptual/AppSandboxDesignGuide/AppSandboxInDepth/AppSandboxInDepth.html#//apple_ref/doc/uid/TP40011183-CH3-SW24
The relevant part:
"POSIX semaphores and shared memory names must begin with the application group
identifier, followed by a slash (/), followed by a name of your choosing."
So if I could inject that string before the leasing slash, I could make this
work.
----------
components: Extension Modules
messages: 201936
nosy: Marc.Liyanage, jnoller, sbt
priority: normal
severity: normal
status: open
title: Add ability to prefix posix semaphore names created by multiprocessing
module
type: enhancement
versions: Python 2.7
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Python tracker <[email protected]>
<http://bugs.python.org/issue19478>
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