usr/src/lib/libsqlite/tool/diffdb.c

   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 }