86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
/*
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** A utility for printing all or part of an SQLite database file.
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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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lseek(db, (iPg-1)*pagesize, SEEK_SET);
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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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if( argc<2 ){
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fprintf(stderr,"Usage: %s FILENAME ?PAGE? ...\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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fstat(db, &sbuf);
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mxPage = sbuf.st_size/pagesize + 1;
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if( argc==2 ){
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int i;
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for(i=1; i<=mxPage; i++) print_page(i);
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}else{
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int i;
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for(i=2; i<argc; i++){
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int iStart, iEnd;
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char *zLeft;
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iStart = strtol(argv[i], &zLeft, 0);
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if( zLeft && strcmp(zLeft,"..end")==0 ){
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iEnd = mxPage;
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}else if( zLeft && zLeft[0]=='.' && zLeft[1]=='.' ){
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iEnd = strtol(&zLeft[2], 0, 0);
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}else{
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iEnd = iStart;
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}
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if( iStart<1 || iEnd<iStart || iEnd>mxPage ){
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fprintf(stderr,
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"Page argument should be LOWER?..UPPER?. Range 1 to %d\n",
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mxPage);
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exit(1);
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}
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while( iStart<=iEnd ){
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print_page(iStart);
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iStart++;
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}
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}
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}
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close(db);
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}
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