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Annotation of 42BSD/usr.lib/libI77/rewind.c, revision 1.1.1.1

1.1       root        1: /*
                      2: char id_rewind[] = "@(#)rewind.c       1.3";
                      3:  *
                      4:  * rewind.c  -  f77 file rewind
                      5:  */
                      6: 
                      7: #include "fio.h"
                      8: 
                      9: static char    rwnd[]  = "rewind";
                     10: 
                     11: f_rew(a) alist *a;
                     12: {      int n;
                     13:        unit *b;
                     14: 
                     15:        lfname = NULL;
                     16:        elist = NO;
                     17:        external = YES;                 /* for err */
                     18:        lunit = a->aunit;
                     19:        errflag = a->aerr;
                     20:        if(not_legal(lunit)) err(errflag,F_ERUNIT,rwnd)
                     21:        b = &units[lunit];
                     22:        if(!b->ufd && (n=fk_open(READ,SEQ,FMT,(ftnint)lunit)) )
                     23:                err(errflag,n,rwnd)
                     24:        lfname = b->ufnm;
                     25:        if(!b->useek) err(errflag,F_ERNOBKSP,rwnd)
                     26:        b->uend = NO;
                     27:        if(b->uwrt)
                     28:                if(n=t_runc(b,errflag,rwnd)) return(n);
                     29:        rewind(b->ufd);
                     30:        return(OK);
                     31: }

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