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GH-111804: Drop posix.fallocate() under WASI (GH-111869)

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Drop posix.fallocate() under WASI.

The underlying POSIX function, posix_fallocate(), was found to vary too
much between implementations to remain in WASI. As such, while it was
available in WASI preview1, it's been dropped in preview2.
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Brett Cannon 2023-11-08 17:20:35 -08:00 • committed by GitHub
parent 31c90d5838
commit 97c4c06d0d
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3 changed files with 10 additions and 5 deletions
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7
Modules/posixmodule.c
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@ -12165,7 +12165,10 @@ os_truncate_impl(PyObject *module, path_t *path, Py_off_t length)
#endif
#if defined(HAVE_POSIX_FALLOCATE) && !defined(POSIX_FADVISE_AIX_BUG)
/* GH-111804: Due to posix_fallocate() not having consistent semantics across
OSs, support was dropped in WASI preview2. */
#if defined(HAVE_POSIX_FALLOCATE) && !defined(POSIX_FADVISE_AIX_BUG) && \
!defined(__wasi__)
/*[clinic input]
os.posix_fallocate
@ -12203,7 +12206,7 @@ os_posix_fallocate_impl(PyObject *module, int fd, Py_off_t offset,
errno = result;
return posix_error();
}
#endif /* HAVE_POSIX_FALLOCATE) && !POSIX_FADVISE_AIX_BUG */
#endif /* HAVE_POSIX_FALLOCATE) && !POSIX_FADVISE_AIX_BUG && !defined(__wasi__) */
#if defined(HAVE_POSIX_FADVISE) && !defined(POSIX_FADVISE_AIX_BUG)