/*
 * Main driver program for EXT2 Filesystem Analysis.
 * Written by Michael Rywalt - 2569
 * Operating System Concepts
 */

#include "../Common/file.h"

int main(int argc, char **argv)
{
    void *pFileSystem;
    tsSuperBlock *pSuperBlock;
    tsInode *pInode;
    tsDirEntry *pDirEntry;
    int iBlockSize;

    printf("\n************** EXT2 Root Print by MGR **************\n");

    if(argc > 1)
    {
        /* Allocate the filesystem into memory. */
        pFileSystem = LoadFileSystem(argv[1]);
        pSuperBlock = (tsSuperBlock*)((char*)pFileSystem + SUPERBLOCK_OFFSET);

        /* Make sure the file has actually been loaded. */
        if(pFileSystem == NULL)
        {
            printf("Error: Filesystem not found, or too small.\n");
            return EXIT_FAILURE;
        }

        /* Verify that we're looking at a real EXT2 filesystem. */
        if(!VerifyFSMagicNumber(pSuperBlock))
        {
            FreeFileSystem(pFileSystem);
            printf("Hmm... Doesn't appear to be an EXT2 filesystem. Corrupted maybe?\n");
            return EXIT_FAILURE;
        }

        /* Get the block size for this file system. */
        iBlockSize = GetFSBlockSize(pSuperBlock);

        printf("FS Type: EXT2\nBlock Size = %d\n", iBlockSize);

        /* Get root directory inode table. The first inode is 0, the second is 1 (in my case, I start at 0). */
        pInode = GetInode(1, pFileSystem);

        /* Print the directory entries out to the screen along with file types. */
        PrintDirectoryListing(pInode, pFileSystem);

        /* We're done, so free up the memory we've used. */
        FreeFileSystem((void*)pFileSystem);
    }
    else
    {
        printf("Usage: %s <filesystem>\n", argv[0]);
    }

    return EXIT_SUCCESS;
}