Directory is file

Markild · 01-14-2006, 04:37 AM

I've downloaded something with bittorrent, and usually that goes great.

I was supposed to end up with a directory with lots of .rar files, but this time I ended up with one huge file. I've looked at the content of this file, and it looks like it really does contain everything.

Anyone got some idea how to make this huge file into a directory? Is it doable?

SciYro · 01-14-2006, 04:43 AM

use the command "file" on that "directory" to see what it really is. Odds are its some kind of container format, as iv never heard of directories being downloadable.

Markild · 01-14-2006, 11:02 AM

It looks like I was able to make a program in C that divided each the archives into separate files. I'll make sure it works, and I can post it here

It's not bulletproof, and it's not great, but it is a way to rescue out some data.

Markild · 01-14-2006, 11:27 AM

Feel free to make it "good"

Code:

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>

#include <sys/types.h>

int main(int argc, char *argv[]) {

	FILE *f_in, *f_out;
	int buff[4];
	char outfile[255];

	int i = 1;
	int check = 0;

	sprintf(outfile, "%s.part%d.rar", argv[2], i);

	f_in = fopen(argv[1], "r");
	if (!f_in) { printf("Error: %s\n", strerror(errno)); exit(0); }

	f_out = fopen(outfile, "w");
	if (!f_out) { printf("Error: %s\n", strerror(errno)); exit(0); }

	while (!feof(f_in)) {
		if (check) {
			buff[3] = buff[2];
			buff[2] = buff[1];
			buff[1] = buff[0];
			check--;
		}
		
		buff[0] = fgetc(f_in);
		
		if (!check) {
			if (buff[0] == 'R') check = 4;
			else fputc(buff[0], f_out);
		} else if (check == 1) {
			if ((buff[3] == 82) && (buff[2] == 97) && (buff[1] == 114) && (buff[0] == 33)) {
				i++;

				fclose(f_out);
				sprintf(outfile, "%s.part%d.rar", argv[2], i);

				f_out = fopen(outfile, "w");
				if (!f_out) { printf("Error: %s\n", strerror(errno)); exit(0); }
				printf("New file, part %d\n", i);
			}
			fputc(buff[3], f_out);
			fputc(buff[2], f_out);
			fputc(buff[1], f_out);
			fputc(buff[0], f_out);
		}
	}
	fclose(f_in);
	fclose(f_out);

}

Markild · 01-14-2006, 07:47 PM

...and if you for some bizzare reason would like to use the code, or something like it, be sure to compile it with: "gcc -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64" for >2GB file support...