Correct definition of __FDMASK.
typedef __uint64_t __fsblkcnt64_t; /* "" (LFS) */
typedef __uint64_t __fsfilcnt_t; /* Type to count file system inodes. */
typedef __uint64_t __fsfilcnt64_t; /* "" (LFS) */
+typedef __uint32_t __id_t; /* General type for IDs. */
typedef struct
{
/* It's easier to assume 8-bit bytes than to get CHAR_BIT. */
#define __NFDBITS (8 * sizeof (__fd_mask))
#define __FDELT(d) ((d) / __NFDBITS)
-#define __FDMASK(d) (1 << ((d) % __NFDBITS))
+#define __FDMASK(d) ((__fd_mask) 1 << ((d) % __NFDBITS))
/* fd_set for select and pselect. */
typedef struct