[issue26539] frozen executables should have an empty path

[Irit Katriel]

Change by Irit Katriel :


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resolution:  -> fixed
stage:  -> resolved
status: open -> closed

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[issue26539] frozen executables should have an empty path

[STINNER Victor]

STINNER Victor  added the comment:

The PEP 587 has been implemented in Python 3.8. The new API allows to 
initialize sys.path to a really empty list: sys.path = [].

* https://docs.python.org/dev/c-api/init_config.html
* 
https://docs.python.org/dev/c-api/init_config.html#c.PyConfig.module_search_paths

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[issue26539] frozen executables should have an empty path

[Daniel Shaulov]

New submission from Daniel Shaulov:

A frozen python executable should have an empty path, so it doesn't 
accidentally run something it was not supposed to.

The attached file achieves that by setting Py_NoSiteFlag and Py_IsolatedFlag in 
Python/frozenmain.c

It also checks for Py_FrozenFlag in Python/sysmodule.c in makepathobject and 
just returns an empty list if it is set.

I originally tried doing it without changing sysmodule, by calling Py_SetPath 
as suggested in the comment in getpath.c, but calling Py_SetPath(L"") will 
leave me with a path that cointains a single empty string. There is no way to 
set an empty path with Py_SetPath.

Other options include allowing Py_SetPath to accept NULL and making sure that 
NULL results in an empty list, or changing the behavior of makepathobject so an 
empty string will result in an empty list instead of a list with an empty 
string.

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components: Demos and Tools
files: freeze_path.patch
keywords: patch
messages: 261566
nosy: Daniel Shaulov, twouters
priority: normal
severity: normal
status: open
title: frozen executables should have an empty path
type: enhancement
versions: Python 3.5, Python 3.6
Added file: http://bugs.python.org/file42133/freeze_path.patch

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