+
+ /* Test behaviour for invalid file descriptors. */
+ {
+ char byte = 'x';
+ errno = 0;
+ ASSERT (pwrite (-1, &byte, 1, 0) == -1);
+ ASSERT (errno == EBADF);
+ }
+ {
+ char byte = 'x';
+ close (99);
+ errno = 0;
+ ASSERT (pwrite (99, &byte, 1, 0) == -1);
+ ASSERT (errno == EBADF);
+ }
+