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# PR_GetLayersIdentity
Gets the unique identity for the layer of the specified file descriptor.
## Syntax
```{code}
#include <prio.h>
PRDescIdentity PR_GetLayersIdentity(PRFileDesc* fd);
```
### Parameter
The function has the following parameter:
`fd`
: A pointer to a file descriptor.
### Returns
If successful, the function returns the {ref}`PRDescIdentity` for the layer
of the specified file descriptor.