[9fans] Q: checking CD vs. iso image

[alexandr babic <alexandr@babi.cz>]

hi.

and what about to compare one byte from cd with one byte from iso
by following short program, but i haven't plan9 here so you have 
to try by yourself :-)

alexandr.


check.c
------------------------------
#include <u.h>
#include <libc.h> 

void main()
{
int cdfd,isofd,i,r;
unsigned char C,I;

cdfd=open("/dev/sdD0/data",OREAD); 
isofd=open("obraz.iso",OREAD); 

i=0;

while(1)
{
 r=read(cdfd,(void*)&C,1);
 if(r==0) break;
 r=read(isofd,(void*)&I,1);
 if(r==0) break;
 i++;

 if(C==I) print("byte position=%d, bytes are same!\n",i);
 else print("byte position=%d, bytes differ! cd is %d, iso is %d
\n",i,C,I);
}

close(cdfd);
close(isofd);
exits(0);
}