218 typedef struct unixFile unixFile;  typedef
219 struct unixFile {  struct
221   sqlite3_vfs *pVfs;                  /* The VFS that created this unixFile */  argument
222   unixInodeInfo *pInode;              /* Info about locks on this inode */
223   int h;                              /* The file descriptor */
224   unsigned char eFileLock;            /* The type of lock held on this fd */
225   unsigned short int ctrlFlags;       /* Behavioral bits.  UNIXFILE_* flags */
226   int lastErrno;                      /* The unix errno from last I/O error */
227   void *lockingContext;               /* Locking style specific state */
228   UnixUnusedFd *pPreallocatedUnused;  /* Pre-allocated UnixUnusedFd */
229   const char *zPath;                  /* Name of the file */
230   unixShm *pShm;                      /* Shared memory segment information */
231   int szChunk;                        /* Configured by FCNTL_CHUNK_SIZE */
233   int nFetchOut;                      /* Number of outstanding xFetch refs */
234   sqlite3_int64 mmapSize;             /* Usable size of mapping at pMapRegion */
235   sqlite3_int64 mmapSizeActual;       /* Actual size of mapping at pMapRegion */
236   sqlite3_int64 mmapSizeMax;          /* Configured FCNTL_MMAP_SIZE value */
237   void *pMapRegion;                   /* Memory mapped region */
239   int sectorSize;                     /* Device sector size */
240   int deviceCharacteristics;          /* Precomputed device characteristics */
242   int openFlags;                      /* The flags specified at open() */
245   unsigned fsFlags;                   /* cached details from statfs() */
248   unsigned iBusyTimeout;              /* Wait this many millisec on locks */
251   struct vxworksFileId *pId;          /* Unique file ID */
282 ** Allowed values for the unixFile.ctrlFlags bitmask:  argument