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#include <zlib.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#define XORLEN (29)
#define HUGEBLOCK (1024*1024)
int main(int argc, char **argv) {
// int infile = open("/Volumes/DasTelefonbuch/atb/phonebook.db", O_RDONLY);
int infile = open( argv[1], O_RDONLY);
unsigned const char xorkey [XORLEN] = "Just for Fun. Linus Torvalds.";
unsigned char input [HUGEBLOCK];
unsigned char output [HUGEBLOCK];
char respath[32]; /* file_XXXXX\0 */
int i, offs = 0, zres = 0, filenum = 0, resfile, avail=1;
z_stream z; memset( &z, 0, sizeof(z));
while( avail ) {
do {
lseek( infile, offs, SEEK_SET );
avail = read( infile, input, HUGEBLOCK );
if( !avail) break;
for( i=0; i<XORLEN; ++i ) input[i] ^= xorkey[i];
z.next_in = input; z.avail_in = avail;
z.next_out = output; z.avail_out = HUGEBLOCK;
inflateInit( &z ); zres = inflate( &z, Z_NO_FLUSH );
if( (zres != Z_OK) && (zres != Z_STREAM_END) ) {
inflateEnd(&z); memset( &z, 0, sizeof(z));
offs++;
}
} while((zres != Z_OK) && (zres != Z_STREAM_END));
if( !avail ) break;
if( zres == Z_OK) while( inflate( &z, Z_NO_FLUSH ) == Z_OK );
sprintf( respath, "file_%05X", filenum++ );
resfile = open( respath, O_RDWR | O_CREAT, 0644 );
/* I know, I know, error checking */
write( resfile, output, z.total_out );
close( resfile );
offs += z.total_in;
inflateEnd(&z); memset( &z, 0, sizeof(z));
}
close( infile );
}
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