Issue #11569: use absolute path to the sysctl command in multiprocessing to
ensure that it will be found regardless of the shell PATH. This ensures
that multiprocessing.cpu_count works on default installs of MacOSX.
diff --git a/Lib/multiprocessing/__init__.py b/Lib/multiprocessing/__init__.py
index 28a5eec..fdd012e 100644
--- a/Lib/multiprocessing/__init__.py
+++ b/Lib/multiprocessing/__init__.py
@@ -115,8 +115,11 @@
except (ValueError, KeyError):
num = 0
elif 'bsd' in sys.platform or sys.platform == 'darwin':
+ comm = '/sbin/sysctl -n hw.ncpu'
+ if sys.platform == 'darwin':
+ comm = '/usr' + comm
try:
- with os.popen('sysctl -n hw.ncpu') as p:
+ with os.popen(comm) as p:
num = int(p.read())
except ValueError:
num = 0
diff --git a/Misc/ACKS b/Misc/ACKS
index c7fd2ff..e5ee871 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -583,6 +583,7 @@
Joe Norton
Neal Norwitz
Michal Nowikowski
+Steffen Daode Nurpmeso
Nigel O'Brian
Kevin O'Connor
Tim O'Malley
diff --git a/Misc/NEWS b/Misc/NEWS
index c4627fa..d5c4699 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -40,6 +40,10 @@
Library
-------
+- Issue #11569: use absolute path to the sysctl command in multiprocessing to
+ ensure that it will be found regardless of the shell PATH. This ensures
+ that multiprocessing.cpu_count works on default installs of MacOSX.
+
- Issue #11501: disutils.archive_utils.make_zipfile no longer fails if zlib is
not installed. Instead, the zipfile.ZIP_STORED compression is used to create
the ZipFile. Patch by Natalia B. Bidart.