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Annotation of 43BSD/usr.lib/libI77/rewind.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1980 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  *
                      6:  *     @(#)rewind.c    5.2     7/30/85
                      7:  */
                      8: 
                      9: /*
                     10:  * rewind.c  -  f77 file rewind
                     11:  */
                     12: 
                     13: #include "fio.h"
                     14: 
                     15: static char    rwnd[]  = "rewind";
                     16: 
                     17: f_rew(a) alist *a;
                     18: {      int n;
                     19:        unit *b;
                     20: 
                     21:        lfname = NULL;
                     22:        elist = NO;
                     23:        external = YES;                 /* for err */
                     24:        lunit = a->aunit;
                     25:        errflag = a->aerr;
                     26:        if(not_legal(lunit)) err(errflag,F_ERUNIT,rwnd)
                     27:        b = &units[lunit];
                     28:        if(!b->ufd) return(OK);
                     29:        lfname = b->ufnm;
                     30:        if(!b->useek) err(errflag,F_ERNOBKSP,rwnd)
                     31:        b->uend = NO;
                     32:        if(b->uwrt)
                     33:                if(n=t_runc(b,errflag,rwnd)) return(n);
                     34:        rewind(b->ufd);
                     35:        return(OK);
                     36: }

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