Returns the array of file descriptors that is contained in this object.
After this call, the descriptors remain the property of
caller must not close them and must not free the array. The array is
valid only until
list is changed in any way.
length is non-
NULL then it is set to the number of file
descriptors in the returned array. The returned array is also
terminated with -1.
This function never returns
NULL. In case there are no file
descriptors contained in
list, an empty array is returned.
Available since: 2.24
Pointer to the length of the returned array, or
The argument will be set by the function. The argument can be