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gh-123014: Disable pidfd API on older Android versions by mhsmith · Pull Request #124458 · python/cpython · GitHub

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gh-123014: Disable pidfd API on older Android versions #124458

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Merged
vstinner merged 2 commits into from
Sep 25, 2024
Conversation 14 Commits 2 Checks 0 Files changed
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gh-123014: Disable pidfd API on older Android versions #124458

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c8568d0
Disable pidfd API on older Android versions
mhsmith Sep 24, 2024
0e3d6da
Add availability markers in docs
mhsmith Sep 25, 2024
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2 changes: 1 addition & 1 deletion Doc/library/os.rst
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Expand Up @@ -4602,7 +4602,7 @@ written in Python, such as a mail server's external command delivery program.

See the :manpage:`pidfd_open(2)` man page for more details.

.. availability:: Linux >= 5.3
.. availability:: Linux >= 5.3, Android >= :func:`build-time <sys.getandroidapilevel>` API level 31
.. versionadded:: 3.9

.. data:: PIDFD_NONBLOCK
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2 changes: 1 addition & 1 deletion Doc/library/signal.rst
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Expand Up @@ -411,7 +411,7 @@ The :mod:`signal` module defines the following functions:

See the :manpage:`pidfd_send_signal(2)` man page for more information.

.. availability:: Linux >= 5.1
.. availability:: Linux >= 5.1, Android >= :func:`build-time <sys.getandroidapilevel>` API level 31
.. versionadded:: 3.9


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3 changes: 3 additions & 0 deletions Misc/NEWS.d/next/Library/2024-09-24-19-32-14.gh-issue-123014.zVcfkZ.rst
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@@ -0,0 +1,3 @@
:func:`os.pidfd_open` and :func:`signal.pidfd_send_signal` are now

freakboy3742 Sep 25, 2024

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Do these methods need addition annotations in the docs to highlight that they're not available?

vstinner Sep 25, 2024

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Ah right, you can write "Android (API level 31 and newer)" in "Availability" of the modified functions.
unavailable when building against Android API levels older than 31, since
the underlying system calls may cause a crash.
6 changes: 3 additions & 3 deletions Modules/clinic/posixmodule.c.h
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6 changes: 3 additions & 3 deletions Modules/clinic/signalmodule.c.h
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5 changes: 4 additions & 1 deletion Modules/posixmodule.c
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Expand Up @@ -10121,7 +10121,10 @@ os_wait_impl(PyObject *module)
}
#endif /* HAVE_WAIT */

#if defined(__linux__) && defined(__NR_pidfd_open)

// This system call always crashes on older Android versions.
#if defined(__linux__) && defined(__NR_pidfd_open) && \
!(defined(__ANDROID__) && __ANDROID_API__ < 31)
/*[clinic input]
os.pidfd_open
pid: pid_t
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4 changes: 3 additions & 1 deletion Modules/signalmodule.c
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Expand Up @@ -1299,7 +1299,9 @@ signal_pthread_kill_impl(PyObject *module, unsigned long thread_id,
#endif /* #if defined(HAVE_PTHREAD_KILL) */


#if defined(__linux__) && defined(__NR_pidfd_send_signal)
// This system call always crashes on older Android versions.
#if defined(__linux__) && defined(__NR_pidfd_send_signal) && \
!(defined(__ANDROID__) && __ANDROID_API__ < 31)
/*[clinic input]
signal.pidfd_send_signal

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