I want to be able to read a windows file which is being periodically written by another process. I created a small
extension which does the following
if(!PyArg_ParseTuple(args, "sss", &fn, &mode, &deny)) return NULL;
if(strcmp(deny, "") == 0) share = _SH_DENYNO; /*allow all*/
else if (strcmp(deny, "r") == 0) share = _SH_DENYRD; /*deny read*/
else if (strcmp(deny, "w") == 0) share = _SH_DENYWR; /*deny write*/
else if (strcmp(deny, "rw") == 0) share = _SH_DENYRW; /*deny
read/write*/
f = _fsopen(fn, mode, share);
if (!f){
PyErr_SetFromErrno(PyExc_Exception);
r = NULL;
ERROR_EXIT();
}
else{
r = PyFile_FromFile(f, fn, mode, fclose);
if(!r) ERROR_EXIT();
}
that seems to work, but I wonder if there's an easier pure python way to do this. Looking at the docs I see O_EXCL, but
the _SH_DENY flags seem to be absent.
--
Robin Becker
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