UNIX 7th Ed. - /usr/src/libI77/rewind.c

   1: #include "fio.h"
   2: f_rew(a) alist *a;
   3: {
   4:     unit *b;
   5:     if(a->aunit>=MXUNIT || a->aunit<0) err(a->aerr,101,"rewind");
   6:     b = &units[a->aunit];
   7:     if(b->ufd == NULL) return(0);
   8:     if(!b->useek) err(a->aerr,106,"rewind")
   9:     if(b->uwrt)
  10:     {   nowreading(b);
  11:         t_runc(b);
  12:     }
  13:     rewind(b->ufd);
  14:     b->uend=0;
  15:     return(0);
  16: }

Defined functions