int main(int argc, char *argv[])
{
s_block *S_block;
p_table *P_table=NULL;
inode *Inode = NULL;
options *Opt;
FILE *fs;
FILE *output; /*where all the data will be outputed*/
uint32_t part_start; /*beginning file system*/
uint32_t inode_off; /*beginning of inode zone*/
uint32_t zone_size;
uint8_t *data;
char **path;
if ((Opt = handleOptions(argc, argv))==NULL)
{
printf("minget [-v] [-p part [-s subpart]] imagefile srcpath [dstpath]\n");
exit(EXIT_FAILURE);
}
FATALCALL((fs = fopen(Opt->imagefile, "rb"))==NULL,"fopen");
/*check super block*/
output = stdout;
if (Opt->dstpath)
FATALCALL((output = fopen(Opt->dstpath, "w+b"))==NULL,"fopen");
part_start = 0; /*0 is start of image*/
if (Opt->part_num == -1 && Opt->subpart_num == -1) /*no partition or subpartition*/
{
if((S_block = getSuperBlock(fs, 0)) == NULL) /*MAGIC NUMBER*/
{
free(S_block);
exit(EXIT_FAILURE);
}
zone_size = S_block->block_size << S_block->log_zone_size;
inode_off = part_start + (2 + S_block->imap_blocks + S_block->zmap_blocks) * S_block->block_size;
}
else if (Opt->part && !Opt->subpart) /*partition but no subpartition*/
{
P_table = getPartTable(fs, part_start, Opt->part_num);
if (P_table == NULL)
exit(EXIT_FAILURE);
part_start = P_table->lFirst * SECTOR_SIZE;
if((S_block = getSuperBlock(fs, 0)) == NULL) /*MAGIC NUMBER*/
{
free(S_block);
exit(EXIT_FAILURE);
}
zone_size = S_block->block_size << S_block->log_zone_size;
inode_off = part_start + (2 + S_block->imap_blocks + S_block->zmap_blocks) * S_block->block_size;
}
else if (Opt->part && Opt->subpart) /* partition and subpartition */
{
P_table = getPartTable(fs, part_start, Opt->part_num); /*0 is start of image*/
if (P_table == NULL)
{
free(P_table);
exit(EXIT_FAILURE);
}
part_start = P_table->lFirst * SECTOR_SIZE;
free(P_table);
P_table = getPartTable(fs, part_start, Opt->subpart_num);
if (P_table == NULL)
{
free(P_table);
exit(EXIT_FAILURE);
}
part_start = P_table->lFirst * SECTOR_SIZE;
if((S_block = getSuperBlock(fs, part_start)) == NULL) /*MAGIC NUMBER*/
{
free(S_block);
exit(EXIT_FAILURE);
}
zone_size = S_block->block_size << S_block->log_zone_size;
inode_off = part_start + (2 + S_block->imap_blocks + S_block->zmap_blocks) * S_block->block_size;
}
else
{
exit(EXIT_FAILURE);
}
path =tokstr(Opt->path, "/");
if ((Inode = getFile(fs, path, inode_off, part_start, zone_size))==NULL)
{
fprintf(stderr, "File Doesn't Exist\n");
exit(EXIT_FAILURE);
}
data = getData(fs, Inode, part_start, zone_size);
if (Opt->verbose)
verbose(S_block, Inode);
printFile(output, data, Inode->size);
fclose(fs); /*check for errors*/
if(P_table!=NULL)
{
free(P_table);
}
free(Opt);
free(S_block);
return EXIT_SUCCESS;
}
void ext2fsutilTest(int start, int length) {
struct ext2_super_block x;
getSuperBlock(start, &x);
int groupNum = getGroupNumber(&x);
int blockSize = EXT2_BLOCK_SIZE(&x);
struct ext2_group_desc groupDescs[MAX_GROUP_NUM];
getGroupDescs(start, groupDescs, groupNum);
unsigned char *blockBitmap = malloc(blockSize * groupNum + 1);
getBlockBitmap(start, groupDescs, groupNum, blockBitmap, blockSize);
unsigned char *inodeBitmap = malloc(blockSize * groupNum + 1);
getInodeBitmap(start, groupDescs, groupNum, inodeBitmap, blockSize);
struct ext2_inode *inodeTable = malloc(sizeof(struct ext2_inode) * x.s_inodes_per_group * groupNum);
getInodeTable(start, &x, groupDescs, groupNum, inodeTable, blockSize);
unsigned char *buf = malloc(inodeTable[localNo(EXT2_ROOT_INO)].i_size);
getData(start, inodeTable + 1, blockSize, buf);
AnalyzeDir(inodeTable + 1, buf);
/* struct ext2_inode *inode;
//we already know /lion is on inode 4017
inode = inodeTable + 4016;
printf("%d\n", isDirectory(inode));
unsigned char *lionbuf = malloc(inode->i_size);
getData(start, inode, blockSize, lionbuf);
AnalyzeDir(inode, lionbuf);
//we already know /lion/tigers is on inode 4018
inode = inodeTable + 4017;
printf("%d\n", isDirectory(inode));
unsigned char *tigersbuf= malloc(inode->i_size);
getData(start, inode, blockSize, tigersbuf);
AnalyzeDir(inode, tigersbuf);
//we already know /lion/tigers/bears is on inode 4019
inode = inodeTable + 4018;
printf("%d\n", isDirectory(inode));
unsigned char *bearsbuf= malloc(inode->i_size);
getData(start, inode, blockSize, bearsbuf);
AnalyzeDir(inode, bearsbuf);
//we already know /lion/tigers/bears/ohmy.txt is on inode 4021
inode = inodeTable + 4020;
printf("%d\n", isDirectory(inode));
unsigned char *txtbuf= malloc(inode->i_size);
getData(start, inode, blockSize, txtbuf);
//printf("%s", txtbuf);
printf("%d\n", isBlockBitmapSet(localNo(inode->i_block[0]), blockBitmap, groupNum, blockSize, &x));
free(txtbuf);
free(bearsbuf);
free(tigersbuf);
free(lionbuf); */
/* struct ext2_inode *inode;
//we already know /oz/tornado/glinda is on inode 30
inode = inodeTable + 29;
printf("%d\n", isSymbolicLink(inode));
printf("%d %d %d %d\n", inode->i_size, inode->i_blocks, inode->i_block[0], inode->i_block[1]);
int i;
for (i = 0; i < inode->i_size; ++i)
printf("%c", ((unsigned char *)inode->i_block)[i]);
printf("\n");
// unsigned char *ozbuf = malloc(inode->i_size);
// getData(start, inode, blockSize, ozbuf);
// printf("%s\n", ozbuf);
// AnalyzeDir(inode, ozbuf);
// free(ozbuf);
*/
free(buf);
free(blockBitmap);
free(inodeBitmap);
}
