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