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python: Check for NULL value before constructing string property

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When retrieving a property value that is a string, if the character pointer in C
was NULL, we would segfault.  This change checks for non-null before creating a
python string representation.  In the case where the character pointer is NULL
we will return a python 'None' for the value.

Signed-off-by: Tony Asleson <tasleson@redhat.com>
This commit is contained in:
Tony Asleson 2015-05-04 15:19:48 -05:00
parent c21f1ba07a
commit e8c11c7df0
1 changed files with 5 additions and 1 deletions
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python/liblvm.c
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@ -877,7 +877,11 @@ static PyObject *get_property(struct lvm_property_value *prop)
PyTuple_SET_ITEM(pytuple, 0, Py_BuildValue("K", prop->value.integer));
}
} else {
if ( prop->value.string ) {
PyTuple_SET_ITEM(pytuple, 0, PYSTRTYPE_FROMSTRING(prop->value.string));
} else {
PyTuple_SET_ITEM(pytuple, 0, Py_None);
}
}
if (prop->is_settable)