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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.
This commit is contained in:
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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2
Misc/NEWS.d/next/Library/2023-11-08-15-58-57.gh-issue-111804.uAXTOL.rst Normal file
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@ -0,0 +1,2 @@
Remove posix.fallocate() under WASI as the underlying posix_fallocate() is
not available in WASI preview2.

6
Modules/clinic/posixmodule.c.h generated
View file

@ -8558,7 +8558,7 @@ exit:
#endif /* (defined HAVE_TRUNCATE || defined MS_WINDOWS) */
#if (defined(HAVE_POSIX_FALLOCATE) && !defined(POSIX_FADVISE_AIX_BUG))
#if (defined(HAVE_POSIX_FALLOCATE) && !defined(POSIX_FADVISE_AIX_BUG) && !defined(__wasi__))
PyDoc_STRVAR(os_posix_fallocate__doc__,
"posix_fallocate($module, fd, offset, length, /)\n"
@ -8603,7 +8603,7 @@ exit:
return return_value;
}
#endif /* (defined(HAVE_POSIX_FALLOCATE) && !defined(POSIX_FADVISE_AIX_BUG)) */
#endif /* (defined(HAVE_POSIX_FALLOCATE) && !defined(POSIX_FADVISE_AIX_BUG) && !defined(__wasi__)) */
#if (defined(HAVE_POSIX_FADVISE) && !defined(POSIX_FADVISE_AIX_BUG))
@ -12403,4 +12403,4 @@ exit:
#ifndef OS_WAITSTATUS_TO_EXITCODE_METHODDEF
#define OS_WAITSTATUS_TO_EXITCODE_METHODDEF
#endif /* !defined(OS_WAITSTATUS_TO_EXITCODE_METHODDEF) */
/*[clinic end generated code: output=a05abdc48e3def44 input=a9049054013a1b77]*/
/*[clinic end generated code: output=0f216bf44ea358f9 input=a9049054013a1b77]*/

7
Modules/posixmodule.c
View file

@ -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)