New submission from Serhiy Storchaka <storchaka+cpyt...@gmail.com>:
The code of _syscmd_file() in the platform module does not match the docstring.
The "-b" option was removed in 685fffa (issue16112), and this leads to
inclusion the executable path in the file command output. If the executable
path contains some key strings like "32-bit" or "PE", platform.architecture()
can return an incorrect result. I think that the "-b" option should be restored.
$ python3 -c 'import platform;
print(platform.architecture("/usr/bin/python3.6"))'
('64bit', 'ELF')
$ cp /usr/bin/python3.6 /tmp/32-bitPE
$ python3 -c 'import platform; print(platform.architecture("/tmp/32-bitPE"))'
('32bit', 'ELF')
Other problem is that the code tests if the string "executable" is contained in
the file command output. But it is not always contained for executables on
Linux.
$ file python
python: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically
linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0,
BuildID[sha1]=d3cfa06c2bdcbf7b6af9e4e6be5061cb8398c086, with debug_info, not
stripped
$ file /usr/bin/python2.7
/usr/bin/python2.7: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV),
dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux
3.2.0, BuildID[sha1]=fd3904306c73383fb371287416257b82d6a3363b, stripped
$ file /usr/bin/python3.6
/usr/bin/python3.6: ELF 64-bit LSB executable, x86-64, version 1 (SYSV),
dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux
3.2.0, BuildID[sha1]=9dae0eec9b3f9cb82612d20dc0c3088feab9e356, stripped
----------
components: Library (Lib)
messages: 330686
nosy: lemburg, serhiy.storchaka, vstinner
priority: normal
severity: normal
status: open
title: Problems with handling the file command output in platform.architecture()
type: behavior
versions: Python 3.6, Python 3.7, Python 3.8
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue35348>
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