Returns the array of file descriptors that is contained in this
object.
After this call, the descriptors remain the property of list. The
caller must not close them and must not free the array. The array is
valid only until list is changed in any way.
If 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.
Since 2.24
Returns the array of file descriptors that is contained in this object. After this call, the descriptors remain the property of list. The caller must not close them and must not free the array. The array is valid only until list is changed in any way. If 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. Since 2.24