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Annotation of 40BSD/lib/libI77/due.c, revision 1.1

1.1     ! root        1: #include "fio.h"
        !             2: s_rdue(a) cilist *a;
        !             3: {
        !             4:        int n;
        !             5:        if(n=c_due(a)) return(n);
        !             6:        reading=1;
        !             7:        if(curunit->uwrt) (void) nowreading(curunit);
        !             8:        return(0);
        !             9: }
        !            10: s_wdue(a) cilist *a;
        !            11: {
        !            12:        int n;
        !            13:        if(n=c_due(a)) return(n);
        !            14:        reading=0;
        !            15:        if(!curunit->uwrt) (void) nowwriting(curunit);
        !            16:        return(0);
        !            17: }
        !            18: c_due(a) cilist *a;
        !            19: {
        !            20:        if(!init) f_init();
        !            21:        if(a->ciunit>=MXUNIT || a->ciunit<0)
        !            22:                err(a->cierr,101,"startio");
        !            23:        recpos=sequential=formatted=0;
        !            24:        external=1;
        !            25:        curunit = &units[a->ciunit];
        !            26:        elist=a;
        !            27:        if(curunit->ufd==NULL && fk_open(DIR,UNF,a->ciunit) ) err(a->cierr,104,"due");
        !            28:        cf=curunit->ufd;
        !            29:        if(curunit->ufmt) err(a->cierr,102,"cdue")
        !            30:        if(!curunit->useek) err(a->cierr,104,"cdue")
        !            31:        if(curunit->ufd==NULL) err(a->cierr,114,"cdue")
        !            32:        (void) fseek(cf,(long)(a->cirec-1)*curunit->url,0);
        !            33:        curunit->uend = 0;
        !            34:        return(0);
        !            35: }
        !            36: e_rdue()
        !            37: {
        !            38:        if(curunit->url==1 || recpos==curunit->url)
        !            39:                return(0);
        !            40:        (void) fseek(cf,(long)(curunit->url-recpos),1);
        !            41:        if(ftell(cf)%curunit->url)
        !            42:                err(elist->cierr,200,"syserr");
        !            43:        return(0);
        !            44: }
        !            45: e_wdue()
        !            46: {
        !            47:        return(e_rdue());
        !            48: }

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