https://github.com/python/cpython/commit/bbcb75c986c47887e6c0757e63d59cd7af544f39
commit: bbcb75c986c47887e6c0757e63d59cd7af544f39
branch: main
author: Jakub Kulík <[email protected]>
committer: serhiy-storchaka <[email protected]>
date: 2025-08-27T20:41:14+03:00
summary:
bpo-41839: Fix error checking in sched_get_priority_ functions (GH-22374)
files:
A Misc/NEWS.d/next/Library/2020-09-23-11-54-17.bpo-41839.kU5Ywl.rst
M Modules/posixmodule.c
diff --git a/Misc/NEWS.d/next/Library/2020-09-23-11-54-17.bpo-41839.kU5Ywl.rst
b/Misc/NEWS.d/next/Library/2020-09-23-11-54-17.bpo-41839.kU5Ywl.rst
new file mode 100644
index 00000000000000..760660408100d5
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2020-09-23-11-54-17.bpo-41839.kU5Ywl.rst
@@ -0,0 +1,2 @@
+Allow negative priority values from :func:`os.sched_get_priority_min` and
+:func:`os.sched_get_priority_max` functions.
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index db18e868661edd..27cb8adc55fd4f 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -8211,10 +8211,10 @@ static PyObject *
os_sched_get_priority_max_impl(PyObject *module, int policy)
/*[clinic end generated code: output=9e465c6e43130521 input=2097b7998eca6874]*/
{
- int max;
-
- max = sched_get_priority_max(policy);
- if (max < 0)
+ /* make sure that errno is cleared before the call */
+ errno = 0;
+ int max = sched_get_priority_max(policy);
+ if (max == -1 && errno)
return posix_error();
return PyLong_FromLong(max);
}
@@ -8232,8 +8232,10 @@ static PyObject *
os_sched_get_priority_min_impl(PyObject *module, int policy)
/*[clinic end generated code: output=7595c1138cc47a6d input=21bc8fa0d70983bf]*/
{
+ /* make sure that errno is cleared before the call */
+ errno = 0;
int min = sched_get_priority_min(policy);
- if (min < 0)
+ if (min == -1 && errno)
return posix_error();
return PyLong_FromLong(min);
}
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