New submission from John Engelke <[email protected]>:
On Mac OS X Catalina+, Pathlib's resolve() method prepends the System Integrity
Protection (SIP) path to the front of the resolved Path, whether you like it or
not.
>>> from pathlib import Path
>>> host_path_str = "/home/somewhere/there/../nowhere"
>>> host_path = Path(host_path_str)
>>> host_path
PosixPath('/home/somewhere/there/../nowhere')
>>> host_path.resolve()
PosixPath('/System/Volumes/Data/home/somewhere/nowhere')
>>> import platform
>>> platform.platform()
'Darwin-19.6.0-x86_64-i386-64bit'
>>> import sys
>>> print (sys.version)
3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 16:52:21)
[Clang 6.0 (clang-600.0.57)]
>>>
In my particular case, I'm just using this feature to resolve paths for an FTP
host, so the path is contrived and doesn't actually exist locally. As one may
guess, this breaks my FTP transfers by foisting a path on me that isn't on the
server.
I know there are other tix for Pathlib's erratic behavior across platforms
which don't talk about this specific issue. I don't think it a behavior across
platforms thing, anyway. Pathlib obviously isn't behaving nicely with SIP and
Apple's Firmlink wormhole like directory traversal stuffs. Oy vey!
----------
components: macOS
messages: 381792
nosy: john.engelke, ned.deily, ronaldoussoren
priority: normal
severity: normal
status: open
title: Pathlib resolve() on Mac Catalina prepends secret path
type: behavior
versions: Python 3.7
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Python tracker <[email protected]>
<https://bugs.python.org/issue42458>
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