[Python-checkins] bpo-35348: Fix platform.architecture() (GH-11159)
Victor Stinner
webhook-mailer at python.org
Mon Dec 17 12:47:30 EST 2018
https://github.com/python/cpython/commit/0af9c33262fb43f39a6558e3f155689e83e10706
commit: 0af9c33262fb43f39a6558e3f155689e83e10706
branch: master
author: Victor Stinner <vstinner at redhat.com>
committer: GitHub <noreply at github.com>
date: 2018-12-17T18:47:24+01:00
summary:
bpo-35348: Fix platform.architecture() (GH-11159)
Make platform.architecture() parsing of "file" command output more
reliable:
* Add the "-b" option to the "file" command to omit the filename;
* Force the usage of the C locale;
* Search also the "shared object" pattern.
Co-Authored-By: Serhiy Storchaka <storchaka at gmail.com>
files:
A Misc/NEWS.d/next/Library/2018-12-14-13-27-45.bpo-35348.u3Y2an.rst
M Lib/platform.py
diff --git a/Lib/platform.py b/Lib/platform.py
index 0fe841c71ce6..9dd3f47075bf 100755
--- a/Lib/platform.py
+++ b/Lib/platform.py
@@ -608,13 +608,21 @@ def _syscmd_file(target, default=''):
import subprocess
target = _follow_symlinks(target)
+ # "file" output is locale dependent: force the usage of the C locale
+ # to get deterministic behavior.
+ env = dict(os.environ, LC_ALL='C')
try:
- output = subprocess.check_output(['file', target],
+ # -b: do not prepend filenames to output lines (brief mode)
+ output = subprocess.check_output(['file', '-b', target],
stderr=subprocess.DEVNULL,
- encoding='latin-1')
+ env=env)
except (OSError, subprocess.CalledProcessError):
return default
- return (output or default)
+ if not output:
+ return default
+ # With the C locale, the output should be mostly ASCII-compatible.
+ # Decode from Latin-1 to prevent Unicode decode error.
+ return output.decode('latin-1')
### Information about the used architecture
@@ -672,7 +680,7 @@ def architecture(executable=sys.executable, bits='', linkage=''):
linkage = l
return bits, linkage
- if 'executable' not in fileout:
+ if 'executable' not in fileout and 'shared object' not in fileout:
# Format not supported
return bits, linkage
diff --git a/Misc/NEWS.d/next/Library/2018-12-14-13-27-45.bpo-35348.u3Y2an.rst b/Misc/NEWS.d/next/Library/2018-12-14-13-27-45.bpo-35348.u3Y2an.rst
new file mode 100644
index 000000000000..190db31cfd68
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2018-12-14-13-27-45.bpo-35348.u3Y2an.rst
@@ -0,0 +1,3 @@
+Make :func:`platform.architecture` parsing of ``file`` command output more
+reliable: add the ``-b`` option to the ``file`` command to omit the filename,
+force the usage of the C locale, and search also the "shared object" pattern.
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