1*c5c4113dSnw141292 /*
2*c5c4113dSnw141292 ** A utility for printing the differences between two SQLite database files.
3*c5c4113dSnw141292 */
4*c5c4113dSnw141292 #include <stdio.h>
5*c5c4113dSnw141292 #include <ctype.h>
6*c5c4113dSnw141292 #include <sys/types.h>
7*c5c4113dSnw141292 #include <sys/stat.h>
8*c5c4113dSnw141292 #include <fcntl.h>
9*c5c4113dSnw141292 #include <unistd.h>
10*c5c4113dSnw141292 #include <stdlib.h>
11*c5c4113dSnw141292
12*c5c4113dSnw141292
13*c5c4113dSnw141292 #define PAGESIZE 1024
14*c5c4113dSnw141292 static int db1 = -1;
15*c5c4113dSnw141292 static int db2 = -1;
16*c5c4113dSnw141292
main(int argc,char ** argv)17*c5c4113dSnw141292 int main(int argc, char **argv){
18*c5c4113dSnw141292 int iPg;
19*c5c4113dSnw141292 unsigned char a1[PAGESIZE], a2[PAGESIZE];
20*c5c4113dSnw141292 if( argc!=3 ){
21*c5c4113dSnw141292 fprintf(stderr,"Usage: %s FILENAME FILENAME\n", argv[0]);
22*c5c4113dSnw141292 exit(1);
23*c5c4113dSnw141292 }
24*c5c4113dSnw141292 db1 = open(argv[1], O_RDONLY);
25*c5c4113dSnw141292 if( db1<0 ){
26*c5c4113dSnw141292 fprintf(stderr,"%s: can't open %s\n", argv[0], argv[1]);
27*c5c4113dSnw141292 exit(1);
28*c5c4113dSnw141292 }
29*c5c4113dSnw141292 db2 = open(argv[2], O_RDONLY);
30*c5c4113dSnw141292 if( db2<0 ){
31*c5c4113dSnw141292 fprintf(stderr,"%s: can't open %s\n", argv[0], argv[2]);
32*c5c4113dSnw141292 exit(1);
33*c5c4113dSnw141292 }
34*c5c4113dSnw141292 iPg = 1;
35*c5c4113dSnw141292 while( read(db1, a1, PAGESIZE)==PAGESIZE && read(db2,a2,PAGESIZE)==PAGESIZE ){
36*c5c4113dSnw141292 if( memcmp(a1,a2,PAGESIZE) ){
37*c5c4113dSnw141292 printf("Page %d\n", iPg);
38*c5c4113dSnw141292 }
39*c5c4113dSnw141292 iPg++;
40*c5c4113dSnw141292 }
41*c5c4113dSnw141292 printf("%d pages checked\n", iPg-1);
42*c5c4113dSnw141292 close(db1);
43*c5c4113dSnw141292 close(db2);
44*c5c4113dSnw141292 }
45