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