4 integer f_rew(a) alist *a;
6 integer f_rew(alist *a)
11 f__fatal (131, "I/O recursion");
12 if(a->aunit>=MXUNIT || a->aunit<0)
13 err(a->aerr,101,"rewind");
14 b = &f__units[a->aunit];
15 if(b->ufd == NULL || b->uwrt == 3)
18 err(a->aerr,106,"rewind");