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Annotation of researchv10dc/cmd/oworm/oscsi/write.c, revision 1.1

1.1     ! root        1: #include       "scsi.h"
        !             2: 
        !             3: static
        !             4: swrite(drive, block, nblock, input)
        !             5:        struct scsi_i *input;
        !             6: {
        !             7:        struct scsi_o output;
        !             8: 
        !             9:        input->bus_id = 1<<scsi_id;
        !            10:        input->cmd[0] = 0x2A;
        !            11:        input->cmd[1] = drive<<5;
        !            12:        input->cmd[2] = block>>24;
        !            13:        input->cmd[3] = block>>16;
        !            14:        input->cmd[4] = block>>8;
        !            15:        input->cmd[5] = block;
        !            16:        input->cmd[6] = 0;
        !            17:        input->cmd[7] = nblock>>8;
        !            18:        input->cmd[8] = nblock;
        !            19:        input->cmd[9] = 0;
        !            20:        if(scsiio(input, &output, nblock*1024, "write") < 0)
        !            21:                return(1);
        !            22:        if(CHECK(output)){
        !            23:                scsidump(&output);
        !            24:                return(1);
        !            25:        }
        !            26:        return(0);
        !            27: }
        !            28: 
        !            29: s_write(drive, block, nblock)
        !            30: {
        !            31:        struct scsi_o output;
        !            32:        struct scsi_i input;
        !            33:        register long *j, i;
        !            34:        int nb = 3;
        !            35:        if((drive < 0) || (drive > 7)){
        !            36:                fprint(2, "bad drive number %d\n", drive);
        !            37:                return(1);
        !            38:        }
        !            39:        fprint(1, "writing %d blocks [%d-%d] on drive %d: ", nblock, block, block+nblock-1, drive);
        !            40:        while(nblock > 0){
        !            41:                if(nblock < nb)
        !            42:                        nb = nblock;
        !            43:                for(j = (long *)input.data, i = nb*256-1; i >= 0; i--)
        !            44:                        *j++ = block;
        !            45:                if(swrite(drive, block, nb, &input))
        !            46:                        return(1);
        !            47:                nblock -= nb;
        !            48:                block += nb;
        !            49:        }
        !            50:        fprint(1, "done\n");
        !            51:        return(0);
        !            52: }

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