1 /*
2 ** A utility for printing an SQLite database journal.
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 static int pagesize = 1024;
14 static int db = -1;
15 static int mxPage = 0;
16
out_of_memory(void)17 static void out_of_memory(void){
18 fprintf(stderr,"Out of memory...\n");
19 exit(1);
20 }
21
print_page(int iPg)22 static print_page(int iPg){
23 unsigned char *aData;
24 int i, j;
25 aData = malloc(pagesize);
26 if( aData==0 ) out_of_memory();
27 read(db, aData, pagesize);
28 fprintf(stdout, "Page %d:\n", iPg);
29 for(i=0; i<pagesize; i += 16){
30 fprintf(stdout, " %03x: ",i);
31 for(j=0; j<16; j++){
32 fprintf(stdout,"%02x ", aData[i+j]);
33 }
34 for(j=0; j<16; j++){
35 fprintf(stdout,"%c", isprint(aData[i+j]) ? aData[i+j] : '.');
36 }
37 fprintf(stdout,"\n");
38 }
39 free(aData);
40 }
41
main(int argc,char ** argv)42 int main(int argc, char **argv){
43 struct stat sbuf;
44 unsigned int u;
45 int rc;
46 unsigned char zBuf[10];
47 unsigned char zBuf2[sizeof(u)];
48 if( argc!=2 ){
49 fprintf(stderr,"Usage: %s FILENAME\n", argv[0]);
50 exit(1);
51 }
52 db = open(argv[1], O_RDONLY);
53 if( db<0 ){
54 fprintf(stderr,"%s: can't open %s\n", argv[0], argv[1]);
55 exit(1);
56 }
57 read(db, zBuf, 8);
58 if( zBuf[7]==0xd6 ){
59 read(db, &u, sizeof(u));
60 printf("Records in Journal: %u\n", u);
61 read(db, &u, sizeof(u));
62 printf("Magic Number: 0x%08x\n", u);
63 }
64 read(db, zBuf2, sizeof(zBuf2));
65 u = zBuf2[0]<<24 | zBuf2[1]<<16 | zBuf2[2]<<8 | zBuf2[3];
66 printf("Database Size: %u\n", u);
67 while( read(db, zBuf2, sizeof(zBuf2))==sizeof(zBuf2) ){
68 u = zBuf2[0]<<24 | zBuf2[1]<<16 | zBuf2[2]<<8 | zBuf2[3];
69 print_page(u);
70 if( zBuf[7]==0xd6 ){
71 read(db, &u, sizeof(u));
72 printf("Checksum: 0x%08x\n", u);
73 }
74 }
75 close(db);
76 }
77