/*
** A utility for printing the differences between two SQLite database files.
*/
#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#define PAGESIZE 1024
static int db1 = -1;
static int db2 = -1;
int main(int argc, char **argv){
int iPg;
unsigned char a1[PAGESIZE], a2[PAGESIZE];
if( argc!=3 ){
fprintf(stderr,"Usage: %s FILENAME FILENAME\n", argv[0]);
exit(1);
}
db1 = open(argv[1], O_RDONLY);
if( db1<0 ){
fprintf(stderr,"%s: can't open %s\n", argv[0], argv[1]);
exit(1);
}
db2 = open(argv[2], O_RDONLY);
if( db2<0 ){
fprintf(stderr,"%s: can't open %s\n", argv[0], argv[2]);
exit(1);
}
iPg = 1;
while( read(db1, a1, PAGESIZE)==PAGESIZE && read(db2,a2,PAGESIZE)==PAGESIZE ){
if( memcmp(a1,a2,PAGESIZE) ){
printf("Page %d\n", iPg);
}
iPg++;
}
printf("%d pages checked\n", iPg-1);
close(db1);
close(db2);
}