On Thu, 2009-06-11 at 07:11 +0800, Daniel.Li wrote:
> Dear List,
>
> I'm trying to get diff/removed data and it's offset out. So I write a
> functions in receive_data. When I run backup, I found there is a weird
> behavior which I don't understand.
>
> i = recv_token(f_in, &data) will receive (i = -1, offset2 = 0) some
> where in the middle of the transfer procedure. That's to say, it's going
> to transfer the first data block from sender,
Sorry, It's to say copy the first block from receiver, NOT first data
block from sender.
> but I have been
> transferring almost half of the file. I noticed it was 92nd block
> (sum.blength = 700) .
>
> Hope I have a clear explanation. I'm really confused now. Any advice and
> suggestion is well appreciated.
>
>
> Below is my code segment to generate file for test.
>
> My Procedure (file 1 and file 2 have the same name, just binary
> difference):
> Step 1: backup File 1
> Step 2: backup Fil 2
>
>
>
> --
> Daniel Li
>
>
> File 1:
> This is the first time backup file.
> > count = 1;
> > nSize = 1;
> > nBlock = 256;
> > nInterval = 4;
> > nAdjust = 256;
> >
> > printf("\nstart to build origin files!\n");
> > ch = 0;
> > for(l = 0; l < count; l++)
> > {
> > memset(buffer,0, 256);
> >
> > sprintf(buffer,"media-test-3MB-file/origin/test/test%02d.dat",l);
> > printf("writting %s \n",buffer);
> > fd = open(buffer, O_RDWR|O_CREAT|O_EXCL,
> > S_IRUSR|S_IWUSR);
> > for(lll = 0; lll < nSize; lll++)
> > {
> > for(mmm = 0; mmm < nAdjust; mmm++)
> > {
> > for(nnn = 0; nnn < nBlock; nnn++)
> > {
> > write_fhead_char(fd, &ch, 1);
> > }
> > ch++;
> > }
> > }
> > }
> > printf("origin files done!\n");
> >
>
>
>
> File 2:
> This is the second time backup. when transferring this file, I met the
> trouble.
> > printf("\nstart to build added data files!\n");
> > ch = 0;
> > for(l = 0; l < count; l++)
> > {
> > memset(buffer,0, 256);
> >
> > sprintf(buffer,"media-test-3MB-file/add/test/test%02d.dat",l);
> > printf("writting %s \n",buffer);
> > fd = open(buffer, O_RDWR|O_CREAT|O_EXCL,
> > S_IRUSR|S_IWUSR);
> > for(lll = 0; lll < nSize + 1; lll++)
> > {
> > for(mmm = 0; mmm < nAdjust; mmm++)
> > {
> > if(mmm % nInterval == 0)
> > {
> > for(nnn = 0; nnn < nBlock;
> > nnn++)
> > {
> > write_fhead_char(fd,
> > &ch, 1);
> > }
> > }
> >
> > for(nnn = 0; nnn < nBlock; nnn++)
> > {
> > write_fhead_char(fd, &ch, 1);
> > }
> > ch++;
> > }
> > }
> > close(fd);
> > }
>
--
Daniel Li
--
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