All sendfile differences between Linux and Solaris were hopefully taken care
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of, and hence we can reenable it within the shutil module.
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This was requested upstream as well:
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https://bugs.python.org/issue41843
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--- Python-3.9.1/Lib/shutil.py
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+++ Python-3.9.1/Lib/shutil.py
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@@ -50,7 +50,7 @@ elif _WINDOWS:
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import nt
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COPY_BUFSIZE = 1024 * 1024 if _WINDOWS else 64 * 1024
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-_USE_CP_SENDFILE = hasattr(os, "sendfile") and sys.platform.startswith("linux")
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+_USE_CP_SENDFILE = hasattr(os, "sendfile")
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_HAS_FCOPYFILE = posix and hasattr(posix, "_fcopyfile") # macOS
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# CMD defaults in Windows 10
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--- Python-3.9.1/Doc/library/shutil.rst
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+++ Python-3.9.1/Doc/library/shutil.rst
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@@ -452,7 +452,8 @@ the use of userspace buffers in Python a
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|
On macOS `fcopyfile`_ is used to copy the file content (not metadata).
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-On Linux :func:`os.sendfile` is used.
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+On Linux, Solaris and other POSIX platforms where :func:`os.sendfile` supports
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+copies between 2 regular file descriptors :func:`os.sendfile` is used.
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On Windows :func:`shutil.copyfile` uses a bigger default buffer size (1 MiB
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instead of 64 KiB) and a :func:`memoryview`-based variant of
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