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Annotation of xinu/sys/LSI/ibput.c, revision 1.1.1.1

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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