1 /*- 2 * Copyright (c) 1980 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.proprietary.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)rewind.c 5.3 (Berkeley) 04/12/91"; 10 #endif /* not lint */ 11 12 /* 13 * rewind.c - f77 file rewind 14 */ 15 16 #include "fio.h" 17 18 static char rwnd[] = "rewind"; 19 20 f_rew(a) alist *a; 21 { int n; 22 unit *b; 23 24 lfname = NULL; 25 elist = NO; 26 external = YES; /* for err */ 27 lunit = a->aunit; 28 errflag = a->aerr; 29 if(not_legal(lunit)) err(errflag,F_ERUNIT,rwnd) 30 b = &units[lunit]; 31 if(!b->ufd) return(OK); 32 lfname = b->ufnm; 33 if(!b->useek) err(errflag,F_ERNOBKSP,rwnd) 34 b->uend = NO; 35 if(b->uwrt) 36 if(n=t_runc(b,errflag,rwnd)) return(n); 37 rewind(b->ufd); 38 return(OK); 39 } 40