#include "fio.h" f_rew(a) alist *a; { unit *b; if(a->aunit>=MXUNIT || a->aunit<0) err(a->aerr,101,"rewind"); b = &units[a->aunit]; if(b->ufd==NULL && fk_open(READ,SEQ,FMT,a->aunit)) err(a->aerr,114,"rewind") if(!b->useek) err(a->aerr,106,"rewind") if(b->uwrt) { nowreading(b); t_runc(b); } rewind(b->ufd); b->uend=0; return(0); }