bpo-38110: Use fdwalk for os.closerange() when available. (GH-15224)
Use fdwalk() on platforms that support it to implement os.closerange().
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@ -0,0 +1,2 @@
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The os.closewalk() implementation now uses the libc fdwalk() API on
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platforms where it is available.
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@ -8422,6 +8422,21 @@ os_close_impl(PyObject *module, int fd)
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}
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#ifdef HAVE_FDWALK
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static int
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_fdwalk_close_func(void *lohi, int fd)
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{
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int lo = ((int *)lohi)[0];
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int hi = ((int *)lohi)[1];
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if (fd >= hi)
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return 1;
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else if (fd >= lo)
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close(fd);
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return 0;
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}
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#endif /* HAVE_FDWALK */
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/*[clinic input]
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os.closerange
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@ -8436,11 +8451,21 @@ static PyObject *
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os_closerange_impl(PyObject *module, int fd_low, int fd_high)
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/*[clinic end generated code: output=0ce5c20fcda681c2 input=5855a3d053ebd4ec]*/
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{
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#ifdef HAVE_FDWALK
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int lohi[2];
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#else
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int i;
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#endif
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Py_BEGIN_ALLOW_THREADS
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_Py_BEGIN_SUPPRESS_IPH
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#ifdef HAVE_FDWALK
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lohi[0] = Py_MAX(fd_low, 0);
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lohi[1] = fd_high;
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fdwalk(_fdwalk_close_func, lohi);
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#else
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for (i = Py_MAX(fd_low, 0); i < fd_high; i++)
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close(i);
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#endif
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_Py_END_SUPPRESS_IPH
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Py_END_ALLOW_THREADS
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Py_RETURN_NONE;
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@ -11500,7 +11500,7 @@ fi
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for ac_func in alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
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clock confstr copy_file_range ctermid dup3 execv explicit_bzero explicit_memset \
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faccessat fchmod fchmodat fchown fchownat \
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fexecve fdopendir fork fpathconf fstatat ftime ftruncate futimesat \
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fdwalk fexecve fdopendir fork fpathconf fstatat ftime ftruncate futimesat \
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futimens futimes gai_strerror getentropy \
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getgrgid_r getgrnam_r \
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getgrouplist getgroups getlogin getloadavg getpeername getpgid getpid \
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@ -3538,7 +3538,7 @@ fi
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AC_CHECK_FUNCS(alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
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clock confstr copy_file_range ctermid dup3 execv explicit_bzero explicit_memset \
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faccessat fchmod fchmodat fchown fchownat \
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fexecve fdopendir fork fpathconf fstatat ftime ftruncate futimesat \
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fdwalk fexecve fdopendir fork fpathconf fstatat ftime ftruncate futimesat \
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futimens futimes gai_strerror getentropy \
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getgrgid_r getgrnam_r \
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getgrouplist getgroups getlogin getloadavg getpeername getpgid getpid \
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@ -337,6 +337,9 @@
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/* Define to 1 if you have the `fdopendir' function. */
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#undef HAVE_FDOPENDIR
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/* Define to 1 if you have the `fdwalk' function. */
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#undef HAVE_FDWALK
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/* Define to 1 if you have the `fexecve' function. */
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#undef HAVE_FEXECVE
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