mirror of
https://github.com/sqlite/sqlite.git
synced 2025-10-31 18:11:01 +03:00
77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
/*
|
|
** A utility for printing an SQLite database journal.
|
|
*/
|
|
#include <stdio.h>
|
|
#include <ctype.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
|
|
|
|
static int pagesize = 1024;
|
|
static int db = -1;
|
|
static int mxPage = 0;
|
|
|
|
static void out_of_memory(void){
|
|
fprintf(stderr,"Out of memory...\n");
|
|
exit(1);
|
|
}
|
|
|
|
static print_page(int iPg){
|
|
unsigned char *aData;
|
|
int i, j;
|
|
aData = malloc(pagesize);
|
|
if( aData==0 ) out_of_memory();
|
|
read(db, aData, pagesize);
|
|
fprintf(stdout, "Page %d:\n", iPg);
|
|
for(i=0; i<pagesize; i += 16){
|
|
fprintf(stdout, " %03x: ",i);
|
|
for(j=0; j<16; j++){
|
|
fprintf(stdout,"%02x ", aData[i+j]);
|
|
}
|
|
for(j=0; j<16; j++){
|
|
fprintf(stdout,"%c", isprint(aData[i+j]) ? aData[i+j] : '.');
|
|
}
|
|
fprintf(stdout,"\n");
|
|
}
|
|
free(aData);
|
|
}
|
|
|
|
int main(int argc, char **argv){
|
|
struct stat sbuf;
|
|
unsigned int u;
|
|
int rc;
|
|
unsigned char zBuf[10];
|
|
unsigned char zBuf2[sizeof(u)];
|
|
if( argc!=2 ){
|
|
fprintf(stderr,"Usage: %s FILENAME\n", argv[0]);
|
|
exit(1);
|
|
}
|
|
db = open(argv[1], O_RDONLY);
|
|
if( db<0 ){
|
|
fprintf(stderr,"%s: can't open %s\n", argv[0], argv[1]);
|
|
exit(1);
|
|
}
|
|
read(db, zBuf, 8);
|
|
if( zBuf[7]==0xd6 ){
|
|
read(db, &u, sizeof(u));
|
|
printf("Records in Journal: %u\n", u);
|
|
read(db, &u, sizeof(u));
|
|
printf("Magic Number: 0x%08x\n", u);
|
|
}
|
|
read(db, zBuf2, sizeof(zBuf2));
|
|
u = zBuf2[0]<<24 | zBuf2[1]<<16 | zBuf2[2]<<8 | zBuf2[3];
|
|
printf("Database Size: %u\n", u);
|
|
while( read(db, zBuf2, sizeof(zBuf2))==sizeof(zBuf2) ){
|
|
u = zBuf2[0]<<24 | zBuf2[1]<<16 | zBuf2[2]<<8 | zBuf2[3];
|
|
print_page(u);
|
|
if( zBuf[7]==0xd6 ){
|
|
read(db, &u, sizeof(u));
|
|
printf("Checksum: 0x%08x\n", u);
|
|
}
|
|
}
|
|
close(db);
|
|
}
|