rwerror
rwerror(gettext("SEEK"), blk);
rwerror(gettext("READ"), blk);
rwerror(gettext("SEEK"), blk);
rwerror(gettext("SEEK"), blk);
rwerror(gettext("WRITE"), blk);
rwerror(gettext("SEEK"), blk);
rwerror("SEEK", blk, -1);
rwerror("READ", blk, i);
rwerror("SEEK", blk, -1);
rwerror("SEEK", blk, -1);
rwerror("WRITE", blk, i);
rwerror("SEEK", blk, -1);
static void rwerror(caddr_t, diskaddr_t, int rval);