int main(int argc, char **argv) {
if(argc != 3) {
fprintf(stderr, "Usage: ext2_mkdir <image file name> <path to file>\n");
exit(1);
}
disk_initialization(argv[1]); /* initialize disk */
/* retrieve the inode index for parent directory */
unsigned int inode_dir = inode_from_path(extract_parent_path(argv[2]));
/* get filename for new directory */
char *filename = extract_filename(argv[2]);
if (dir_find(inode_dir, filename)) {
// Case: filename already exists
fprintf(stderr, "%s: already exists\n", argv[2]);
exit(EEXIST);
}
/* allocate inode for new directory */
unsigned int new_inode = allocate_inode();
/* initialize the new directory inode and add as entry to parent directory */
init_dir_inode(new_inode, inode_dir, filename);
return 0;
}
int main(int argc, char **argv) {
if(argc != 3) {
fprintf(stderr, "Usage: ext2_rm <image file name> <path to file>\n");
exit(1);
}
disk_initialization(argv[1]); /* initialize disk */
unsigned int dir_inode = inode_from_path(extract_parent_path(argv[2])); /* get inode index from path */
struct ext2_dir_entry_2 *de = dir_find(dir_inode, extract_filename(argv[2]));
if (de == NULL) {
fprintf(stderr, "No such file or directory\n");
exit(ENOENT);
}
unsigned int inode_index = de->inode;
if (has_file_type(EXT2_INODE_FT_DIR, inode_index)) {
fprintf(stderr, "%s: is a directory\n", argv[2]);
exit(EISDIR);
}
else {
/* remove directory entry associated with file */
delete_entry(dir_inode, extract_filename(argv[2]));
}
return 0;
}
static int msfs_getattr(const char *path, struct stat *stbuf) {
printf("msfs_getattr(%s)\n", path);
reset_error();
inode_t inode = inode_from_path(path);
if(msfs_error != 0) return msfs_error;
*stbuf = inode.attributes;
printf("msfs_getattr(%s), found.\n", path);
return 0;
}
static int msfs_opendir(const char * path, fuse_file_info * fi) {
printf("msfs_opendir(%s)\n", path);
reset_error();
inode_t inode = inode_from_path(path);
if(msfs_error != 0) return msfs_error;
if(!is_directory(&inode)) return -ENOTDIR;
if(!check_access(&inode, fi->flags)) return -EPERM;
fi->fh = (uint64_t) inode.attributes.st_ino;
printf("msfs_opendir(%s) found inode %lu\n", path, inode.attributes.st_ino);
return 0;
}
static int msfs_open(const char *path, fuse_file_info *fi) {
printf("msfs_open(%s)\n", path);
reset_error();
inode_t inode = inode_from_path(path);
if(msfs_error != 0) return msfs_error;
if(is_directory(&inode)) return -EISDIR;
if(!check_access(&inode, fi->flags)) return -EPERM;
printf("Lock owner: %lu\n", fi->lock_owner);
fi->fh = (uint64_t) inode.attributes.st_ino;
return msfs_error;
}
