+#if defined __sun
+ /* Solaris has BSD-style /dev/pty[p-r][0-9a-f] files, but the function
+ ptsname() does not work on them. */
+ {
+ int fd;
+ char *result;
+
+ /* Open the controlling tty of the current process. */
+ fd = open ("/dev/ptmx", O_RDWR | O_NOCTTY);
+ if (fd < 0)
+ {
+ fprintf (stderr, "Skipping test: cannot open pseudo-terminal\n");
+ return 77;
+ }
+
+ result = ptsname (fd);
+ ASSERT (result != NULL);
+ ASSERT (memcmp (result, "/dev/pts/", 9) == 0);
+
+ close (fd);
+ }
+
+#else
+