# define ST_NBLOCKSIZE 512
#endif
+/* Network Appliance file systems store small files directly in the
+ inode if st_size <= 64; in this case the number of blocks can be
+ zero. Perhaps other file systems have similar problems; so,
+ somewhat arbitrarily, do not consider a file to be sparse if
+ it has no blocks but st_size < ST_NBLOCKSIZE. */
#define ST_IS_SPARSE(st) \
(ST_NBLOCKS (st) \
- < ((st).st_size / ST_NBLOCKSIZE + ((st).st_size % ST_NBLOCKSIZE != 0)))
+ < ((st).st_size / ST_NBLOCKSIZE \
+ + ((st).st_size % ST_NBLOCKSIZE != 0 \
+ && (st).st_size / ST_NBLOCKSIZE != 0)))
/* Declare standard functions. */
# define SET_BINARY_MODE(arc)
# define ERRNO_IS_EACCES 0
# define TTY_NAME "/dev/tty"
-# define sys_reset_uid_gid() \
- do { setuid (getuid ()); setgid (getgid ()); } while (0)
+# define sys_reset_uid_gid() \
+ do { \
+ if (! (setuid (getuid ()) == 0 && setgid (getgid ()) == 0)) \
+ abort (); \
+ } while (0)
#endif
#if XENIX