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Annotation of xinu/sys/LSI/ibput.c, revision 1.1

1.1     ! root        1: /* ibput.c - ibput */
        !             2: 
        !             3: #include <conf.h>
        !             4: #include <kernel.h>
        !             5: #include <io.h>
        !             6: #include <disk.h>
        !             7: #include <lfile.h>
        !             8: #include <dir.h>
        !             9: 
        !            10: /*------------------------------------------------------------------------
        !            11:  *  ibput  --  write an iblock back to disk given its number
        !            12:  *------------------------------------------------------------------------
        !            13:  */
        !            14: ibput(diskdev, inum, loc)
        !            15: int    diskdev;
        !            16: IBADDR inum;
        !            17: struct iblk    *loc;
        !            18: {
        !            19:        DBADDR  dba;
        !            20:        char    *buff;
        !            21:        char    *to, *from;
        !            22:        int     i;
        !            23:        int     ibsem;
        !            24: 
        !            25:        dba = ibtodb(inum);
        !            26:        buff = getbuf(dskdbp);
        !            27:        ibsem = ((struct dsblk *)devtab[diskdev].dvioblk)->dibsem;
        !            28:        wait(ibsem);
        !            29:        read(diskdev, buff, dba);
        !            30:        to = buff + ibdisp(inum);
        !            31:        from = (char *)loc;
        !            32:        for (i=0 ; i<sizeof(struct iblk) ; i++)
        !            33:                *to++ = *from++;
        !            34:        write(diskdev, buff, dba);
        !            35:        signal(ibsem);
        !            36:        return(OK);
        !            37: }

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