keyctl_clear - clear a keyring
long keyctl_clear(key_serial_t keyring);
keyctl_clear() clears the contents of a keyring.
The caller must have write permission on a keyring to be
able to clear it.
On success keyctl_clear() returns 0. On error, the value -1
will be returned and errno will have been set to an appropriate error.
This is a library function that can be found in libkeyutils. When
linking, -lkeyutils should be specified to the linker.
- The keyring specified is invalid.
- The keyring specified has expired.
- The keyring specified had been revoked.
- The keyring exists, but is not writable by the calling