POLLNVAL           23 native_client_sdk/src/libraries/nacl_io/include/sys/poll.h #define POLLNVAL 0x0020   /* Invalid FD. */
POLLNVAL           59 third_party/libusb/src/libusb/os/poll_windows.h #define POLLNVAL    0x0020    /* Invalid request: fd not open */
POLLNVAL          545 third_party/npapi/npspy/extern/nspr/md/_unixos.h #define	POLLNVAL	0x0020		/* invalid pollfd entry */