xref: /illumos-gate/usr/src/lib/libsqlite/tool/diffdb.c (revision e4d060fb4c00d44cd578713eb9a921f594b733b8)
1 
2 #pragma ident	"%Z%%M%	%I%	%E% SMI"
3 
4 /*
5 ** A utility for printing the differences between two SQLite database files.
6 */
7 #include <stdio.h>
8 #include <ctype.h>
9 #include <sys/types.h>
10 #include <sys/stat.h>
11 #include <fcntl.h>
12 #include <unistd.h>
13 #include <stdlib.h>
14 
15 
16 #define PAGESIZE 1024
17 static int db1 = -1;
18 static int db2 = -1;
19 
20 int main(int argc, char **argv){
21   int iPg;
22   unsigned char a1[PAGESIZE], a2[PAGESIZE];
23   if( argc!=3 ){
24     fprintf(stderr,"Usage: %s FILENAME FILENAME\n", argv[0]);
25     exit(1);
26   }
27   db1 = open(argv[1], O_RDONLY);
28   if( db1<0 ){
29     fprintf(stderr,"%s: can't open %s\n", argv[0], argv[1]);
30     exit(1);
31   }
32   db2 = open(argv[2], O_RDONLY);
33   if( db2<0 ){
34     fprintf(stderr,"%s: can't open %s\n", argv[0], argv[2]);
35     exit(1);
36   }
37   iPg = 1;
38   while( read(db1, a1, PAGESIZE)==PAGESIZE && read(db2,a2,PAGESIZE)==PAGESIZE ){
39     if( memcmp(a1,a2,PAGESIZE) ){
40       printf("Page %d\n", iPg);
41     }
42     iPg++;
43   }
44   printf("%d pages checked\n", iPg-1);
45   close(db1);
46   close(db2);
47 }
48