Workaround for /tmp/ directory not existing in testing environment

Author: Blackhex

winsup/testsuite/libltp/lib/tst_tmpdir.c

@@ -136,6 +136,13 @@ tst_tmpdir()
          tst_brkm(TBROK, tmpdir_cleanup, "%s: tempnam(%s, %s) failed",
                   FN_NAME, TEMPDIR, prefix);
 
+      struct stat st;
+      if ( stat(P_tmpdir, &st) != 0 || !S_ISDIR(st.st_mode) )
+         if ( mkdir(P_tmpdir, DIR_MODE) == -1 )
+           tst_brkm(TBROK, tmpdir_cleanup,
+                    "%s: mkdir(%s, %#o) failed; errno = %d: %s",
+                    FN_NAME, P_tmpdir, DIR_MODE, errno, strerror(errno));
+
       /*
        * Create the temporary directory.
        */