int fs_getattr(const char *path, struct stat *statbuf) {
fprintf(stderr, "fs_getattr(path=\"%s\")\n", path);
s3context_t *ctx = GET_PRIVATE_DATA;
char* s3bucket = (char*)ctx;
s3dirent_t* dirs = NULL;
s3dirent_t* more_dirs = NULL;
ssize_t size = s3fs_get_object(s3bucket, path, (uint8_t**)&dirs, 0, 0);
if (size<0) {
printf("This object does not exist\n");
free(dirs);
return -ENOENT;
}
char* copy_path_1 = strdup(path);
char* copy_path_2 = strdup(path);
char* directory = dirname(copy_path_1);
char* base = basename(copy_path_2);
size = s3fs_get_object(s3bucket, directory, (uint8_t**)&more_dirs, 0, 0);
if (size < 0) {
free(dirs);
free(copy_path_1);
free(copy_path_2);
free(more_dirs);
return -EIO;
}
int entries = size/sizeof(s3dirent_t);
printf("ENTRIES = %d\n", entries);
int i=0;
for(;i<entries;i++) {
if ( strcasecmp(more_dirs[i].name, base) == 0) {
if (more_dirs[i].type == 'F') {
printf("found the file! & doing stat for file!\n");
statbuf->st_mode = more_dirs[i].protection;
statbuf->st_uid = more_dirs[i].user_id;
statbuf->st_nlink = more_dirs[i].hard_links;
statbuf->st_size = more_dirs[i].size;
statbuf->st_atime = more_dirs[i].last_access;
statbuf->st_mtime = more_dirs[i].mod_time;
statbuf->st_ctime = more_dirs[i].status_change;
free(copy_path_1);
free(copy_path_2);
free(more_dirs);
free(dirs);
return 0;
}
}
}
printf("doing stat for a directory!\n");
statbuf->st_mode = dirs[0].protection;
statbuf->st_uid = dirs[0].user_id;
statbuf->st_nlink = dirs[0].hard_links;
statbuf->st_size = dirs[0].size;
statbuf->st_atime = dirs[0].last_access;
statbuf->st_mtime = dirs[0].mod_time;
statbuf->st_ctime = dirs[0].status_change;
free(dirs);
free(copy_path_1);
free(copy_path_2);
free(more_dirs);
return 0;
}
/*
* Rename a file.
*/
int fs_rename(const char *path, const char *newpath) {
fprintf(stderr, "fs_rename(fpath=\"%s\", newpath=\"%s\")\n", path, newpath);
s3context_t *ctx = GET_PRIVATE_DATA;
char* s3bucket = (char*)ctx;
FILE* f = NULL;
s3dirent_t* more_dirs = NULL;
ssize_t size = s3fs_get_object(s3bucket, path, (uint8_t**)&f, 0, 0);
if (size<0) {
printf("This object does not exist\n");
return -ENOENT;
}
s3fs_remove_object(s3bucket,path);
s3fs_put_object(s3bucket, path, (uint8_t*)f, sizeof(f));
char* copy_path_1 = strdup(path);
char* copy_path_2 = strdup(path);
char* directory = dirname(copy_path_1);
char* base = basename(copy_path_2);
char* copy_new_path = strdup(newpath);
char* newbase = basename(copy_new_path);
size = s3fs_get_object(s3bucket, directory, (uint8_t**)&more_dirs, 0, 0);
if (size < 0) {
return -EIO;
}
int entries = size/sizeof(s3dirent_t);
printf("ENTRIES = %d\n", entries);
int i=0;
for(;i<entries;i++) {
if ( strcasecmp(more_dirs[i].name,base) == 0) {
more_dirs[i].name = newbase;
}
}
s3fs_put_object(s3bucket, directory, (uint8_t*)more_dirs, sizeof(more_dirs));
return -EIO;
}
/*
* Create a new directory.
*
* Note that the mode argument may not have the type specification
* bits set, i.e. S_ISDIR(mode) can be false. To obtain the
* correct directory type bits (for setting in the metadata)
* use mode|S_IFDIR.
*/
int fs_mkdir(const char *path, mode_t mode) {
fprintf(stderr, "fs_mkdir(path=\"%s\", mode=0%3o)\n", path, mode);
s3context_t *ctx = GET_PRIVATE_DATA;
char* s3bucket = (char*)ctx;
mode |= S_IFDIR;
s3dirent_t* init_dirs = NULL;
// check if the directory already exists
ssize_t size = s3fs_get_object(s3bucket, path, (uint8_t**)&init_dirs, 0, 0);
if (size >= 0) {
printf("This Directory Already Exists!\n");
free(init_dirs);
return -EIO;
}
// put a new object
s3dirent_t new_dir_obj;
new_dir_obj.name = ".";
new_dir_obj.type = 'D';
new_dir_obj.protection = mode;
new_dir_obj.user_id = getuid();
new_dir_obj.group_id = getgid();
new_dir_obj.hard_links = 0;
new_dir_obj.size = 0;
new_dir_obj.last_access = time(NULL);
new_dir_obj.mod_time = time(NULL);
new_dir_obj.status_change = time(NULL);
s3fs_put_object(s3bucket, path, (uint8_t*)&new_dir_obj, sizeof(s3dirent_t) );
// add to end of directory
printf("JUST ADDED NEW OBJECT WITH KEY %s\n", path);
s3dirent_t* dirs = NULL;
char* copy_path_1 = strdup(path);
char* copy_path_2 = strdup(path);
char* directory = dirname(copy_path_1);
printf("DIRECTORY = %s\n", directory);
char* base = basename(copy_path_2);
printf("BASE = %s\n", base);
size = s3fs_get_object(s3bucket, directory, (uint8_t**)&dirs, 0, 0);
if (size < 0) {
free(init_dirs);
free(copy_path_1);
free(copy_path_2);
free(dirs);
return -EIO;
}
int entries = size/sizeof(s3dirent_t);
printf("NEW ENTRIES mkdir %d\n", entries);
s3dirent_t new_dirent;
new_dirent.name = base;
s3dirent_t new_arr[entries+1];
int i=0;
for(;i<entries;i++) {
printf("ADDING TO NEW ARR %s at %d\n", dirs[i].name, i);
new_arr[i] = dirs[i];
}
new_arr[i] = new_dirent;
printf("ADDING TO NEW ARR %s at %d\n", new_dirent.name, i);
s3fs_put_object(s3bucket, directory, (uint8_t*)&new_arr, sizeof(s3dirent_t)*(entries+1));
//missing frees
free(init_dirs);
return 0;
}
/*
* Change the size of an open file. Very similar to fs_truncate (and,
* depending on your implementation), you could possibly treat it the
* same as fs_truncate.
*/
int fs_ftruncate(const char *path, off_t offset, struct fuse_file_info *fi) {
char * dir_name = dirname(strdup(path));
char * base_name = basename(strdup(path));
ssize_t ret_val = 0;
uint8_t * buffer = NULL;
s3context_t *ctx = GET_PRIVATE_DATA;
size_t path_len = strlen(path);
char * file_content_key = (char *)malloc(path_len + 2); // no point of multiplying by sizeof(char)
// since the below code assumes ANSI anyways
file_content_key[0] = '~';
memcpy(&file_content_key[1], path, path_len);
file_content_key[path_len + 1] = '\0';
ret_val = s3fs_get_object(ctx->s3bucket, file_content_key, &buffer, 0, 0);
if (NULL != buffer) {
free(buffer);
}
if (0 > ret_val) {
free(file_content_key);
return -ENOENT;
}
ret_val = s3fs_put_object(ctx->s3bucket, file_content_key, NULL, 0);
free(file_content_key);
// set the new size and times
ret_val = s3fs_get_object(ctx->s3bucket, dir_name, &buffer, 0, 0);
if (0 > ret_val) {
return -EIO;
}
s3dirent_t * entries = (s3dirent_t *)buffer;
int dirent_count = ret_val / sizeof(s3dirent_t);
int i = 0;
time_t current_time = time(NULL);
for (; i < dirent_count; i++) {
if (0 == strncmp(entries[i].name, base_name, 256)) {
entries[i].size = 0;
entries[i].atime = current_time;
entries[i].mtime = current_time;
if (-1 == s3fs_put_object(ctx->s3bucket, dir_name, (uint8_t *)buffer, ret_val)) {
free(buffer);
return -EIO;
}
free(buffer);
return 0;
}
}
free(buffer);
return -EIO;
}
/*
* Create a file "node". When a new file is created, this
* function will get called.
* This is called for creation of all non-directory, non-symlink
* nodes. You *only* need to handle creation of regular
* files here. (See the man page for mknod (2).)
*/
int fs_mknod(const char *path, mode_t mode, dev_t dev) {
fprintf(stderr, "fs_mknod(path=\"%s\", mode=0%3o)\n", path, mode);
s3context_t *ctx = GET_PRIVATE_DATA;
char* s3bucket = (char*)ctx;
s3dirent_t* dirs = NULL;
ssize_t size = s3fs_get_object(s3bucket, path, (uint8_t**)&dirs, 0, 0);
if (size >= 0) {
printf("This File Already Exists!\n");
return -EIO;
}
char* copy_path_1 = strdup(path);
char* copy_path_2 = strdup(path);
char* directory = dirname(copy_path_1);
printf("DIRECTORY = %s\n", directory);
char* base = basename(copy_path_2);
printf("BASE = %s\n", base);
// PUT a new file object containing empty content
FILE* f = fopen(base,"a+");
if ( s3fs_put_object(s3bucket, path, (uint8_t*)f, sizeof(f) ) < 0 ) {
return -EIO;
}
printf("JUST ADDED NEW FILE OBJECT WITH KEY %s\n", path);
// add to end of directory
size = s3fs_get_object(s3bucket, directory, (uint8_t**)&dirs, 0, 0);
if (size < 0) {
return -EIO;
}
int entries = size/sizeof(s3dirent_t);
printf("NUM ENTRIES mknod %d\n", entries);
s3dirent_t file_obj;
file_obj.name = base;
file_obj.type = 'F';
file_obj.protection = mode;
file_obj.user_id = getuid();
file_obj.group_id = getgid();
file_obj.hard_links = 0;
file_obj.size = sizeof(f);
file_obj.last_access = time(0);
file_obj.mod_time = time(0);
file_obj.status_change = time(0);
s3dirent_t new_arr[entries+1];
int i=0;
for(;i<entries;i++) {
printf("ADDING TO NEW ARR %s at %d\n", dirs[i].name, i);
new_arr[i] = dirs[i];
}
new_arr[i] = file_obj;
printf("ADDING TO NEW NEW ARR %s at %d\n", file_obj.name, i);
s3fs_put_object(s3bucket, directory, (uint8_t*)&new_arr, sizeof(s3dirent_t)*(entries+1));
return 0;
}
/* STEP 1
* Remove a directory.
*/
int fs_rmdir(const char *path) {
char * dir_name = dirname(strdup(path));
char * base_name = basename(strdup(path));
ssize_t ret_val = 0;
uint8_t * buffer = NULL;
fprintf(stderr, "fs_rmdir(path=\"%s\")\n", path);
s3context_t *ctx = GET_PRIVATE_DATA;
ret_val = s3fs_get_object(ctx->s3bucket, path, &buffer, 0, 0);
if (0 > ret_val) {
return -ENOENT;
}
free(buffer);
if (sizeof(s3dirent_t) != ret_val) {
// more than one entry, I chose to use EINVAL here
return -EINVAL;
}
if (0 != s3fs_remove_object(ctx->s3bucket, path)) {
return -EIO;
}
ret_val = s3fs_get_object(ctx->s3bucket, dir_name, &buffer, 0, 0);
if (0 > ret_val) {
// no parent
return -EIO;
}
// make room for all entries but the deleted directory
s3dirent_t * new_parent_dir = (s3dirent_t *)malloc(ret_val - sizeof(s3dirent_t));
s3dirent_t * entries = (s3dirent_t *)buffer;
int dirent_count = ret_val / sizeof(s3dirent_t);
int i = 0;
int copy_index = 0;
for (; i < dirent_count; i++) {
if (0 != strncmp(entries[i].name, base_name, 256) && (copy_index < (dirent_count - 1))) {
memcpy(&new_parent_dir[copy_index], &entries[i], sizeof(s3dirent_t));
copy_index++;
}
}
ret_val = s3fs_put_object(ctx->s3bucket, dir_name, (uint8_t *)new_parent_dir, (dirent_count - 1) * sizeof(s3dirent_t));
if (-1 == ret_val) {
free(new_parent_dir);
return -EIO;
}
free(new_parent_dir);
return 0;
}
/*
* Change the size of a file.
*/
int fs_truncate(const char *path, off_t newsize) {
fprintf(stderr, "fs_truncate(path=\"%s\", newsize=%d)\n", path, (int)newsize);
s3context_t *ctx = GET_PRIVATE_DATA;
uint8_t *dir = NULL;
char *temp_path = strdup(path), *temp_path1 = strdup(path);
char *dir_name = strdup(dirname(temp_path)), *base_name = strdup(basename(temp_path1));
free(temp_path); free(temp_path1);
if(s3fs_get_object(ctx->s3bucket, path, &dir, 0, 0)<0) {
fprintf(stderr, "INVALID PATH: fs_truncate\n");
free(base_name); free(dir_name);
return -ENOENT;
}
char *file = (char *)dir;
file = realloc(file, 0);
/*if(s3fs_remove_object(ctx->s3bucket, path)!=0) {
fprintf(stderr, "error removing object\n");
free(base_name); free(dir_name);
return -EIO;
}*/
if(s3fs_put_object(ctx->s3bucket, path, file, 0) != 0) {
fprintf(stderr, "error putting on truncated file\n");
free(base_name); free(dir_name);
return -EIO;
}
free(file);
uint8_t *dir1 = NULL;
ssize_t dir_size;
if((dir_size=s3fs_get_object(ctx->s3bucket, dir_name, &dir1, 0, 0))< 0) {
fprintf(stderr, "ERROR PULLING PARENT DIRECTORY\n");
free(base_name); free(dir_name);
return -EIO;
}
s3dirent_t *dirent = (s3dirent_t *)dir1;
int i = 0;
for(;i<dir_size/sizeof(s3dirent_t);i++) {
if(!strcmp(base_name, dirent[i].name)) {
dirent[i].metadata.st_size = 0;
printf("size of file in directory: %d\n", dirent[i].metadata.st_size);
break;
}
}
printf("new size of parent directory: %d\n",sizeof(*dirent));
if(s3fs_put_object(ctx->s3bucket, dir_name, (uint8_t*)dirent, sizeof(*dirent))!=sizeof(*dirent)) {
fprintf(stderr, "Error putting object back: fs_truncate\n");
free(dirent);free(dir_name); free(base_name);
return -EIO;
}
free(dirent); free(dir_name); free(base_name);
return 0;
}
/*
* Read directory. See the project description for how to use the filler
* function for filling in directory items.
*/
int fs_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset,
struct fuse_file_info *fi)
{
fprintf(stderr, "fs_readdir(path=\"%s\", buf=%p, offset=%d)\n",
path, buf, (int)offset);
s3context_t *ctx = GET_PRIVATE_DATA;
char* temp_path = strdup(path);
uint8_t *dir = NULL;
ssize_t dir_size = NULL;
if((dir_size = s3fs_get_object(ctx->s3bucket, temp_path, &dir, 0,0))<0) {
fprintf(stderr, "CANNOT READ FILE: fs_readdir\n");
free(temp_path);
return -EIO;
}
s3dirent_t *directory = (s3dirent_t *)dir;
if(directory[0].type != 'D') {
fprintf(stderr, "NOT A DIRECTORY!:fs_readdir\n");
free(directory); free(temp_path);return -EIO;
}
int numdirent = dir_size/sizeof(s3dirent_t), i = 0;
for(;i<numdirent;i++) {
if(filler(buf, directory[i].name, NULL, 0) != 0) {
free(directory);free(temp_path);
return -ENOMEM;
}
}
free(directory); free(temp_path);
return 0;
}
/*
* Read data from an open file
*
* Read should return exactly the number of bytes requested except
* on EOF or error, otherwise the rest of the data will be
* substituted with zeroes.
*/
int fs_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi) {
fprintf(stderr, "fs_read(path=\"%s\", buf=%p, size=%d, offset=%d)\n",
path, buf, (int)size, (int)offset);
s3context_t *ctx = GET_PRIVATE_DATA;
uint8_t *file = NULL;
ssize_t file_size, new_size;
int i = offset;
if((file_size = s3fs_get_object(ctx->s3bucket, path, &file, 0,0))<0) {
fprintf(stderr, "INVALID PATH: fs_read\n");
return -ENOENT;
}
char *file_data = strdup((char *)file);
if(offset+size > file_size) {
new_size = offset + size;
for(;i<file_size;i++) {
buf[i] = file_data[i];
}
for(;i<new_size;i++) {
buf[i] = 0;
}
}else {
new_size = file_size;
for(;i<new_size;i++) {
buf[i] = file_data[i];
}
}
free(file_data);
return new_size;
}
/*
* Find what type of file path, return 1 on directory, 2 on file, 0 if
* it does not exist
*/
int fs_findtype( char *path){
char parent[1024];
char file[1024];
char cpy[1024];
strcpy(cpy,path);
strcpy(file, basename(cpy));
strcpy(parent,dirname(cpy));
if(!strcmp(path,"/")){//if looking for root
strcpy(file, ".");
}
uint8_t * buff;
int rv = s3fs_get_object(getenv(S3BUCKET), parent, &buff, 0, 0);
int dirsize = (rv)/(sizeof(s3dirent_t));
s3dirent_t * parentdir = (s3dirent_t*)buff;
int i = 0;
fprintf(stderr, "\n%d\n", rv);
parentdir[0].atime = time(NULL);// update access time
s3fs_put_object(getenv(S3BUCKET), parent, (uint8_t*) parentdir, parentdir[0].st_size);
for(;i<dirsize;i++){
fprintf(stderr, "FILE\n%s\n%s\n%s\n", file,parent,parentdir[i].name);
if (!(strcmp(parentdir[i].name,file))){
if (parentdir[i].type == 'd'){
free(parentdir);
return 1;
}
free(parentdir);
return 2; //assuming that filetype is not corrupted --> may want to add check/ handling later
}
}
free(parentdir);
return 0;
}
/*
* File open operation
* No creation, or truncation flags (O_CREAT, O_EXCL, O_TRUNC)
* will be passed to open(). Open should check if the operation
* is permitted for the given flags.
*
* Optionally open may also return an arbitrary filehandle in the
* fuse_file_info structure (fi->fh).
* which will be passed to all file operations.
* (In stages 1 and 2, you are advised to keep this function very,
* very simple.)
*/
int fs_open(const char *path, struct fuse_file_info *fi) {
char * dir_name = dirname(strdup(path));
char * base_name = basename(strdup(path));
uint8_t * buffer = NULL;
ssize_t ret_val = 0;
fprintf(stderr, "fs_open(path\"%s\")\n", path);
s3context_t *ctx = GET_PRIVATE_DATA;
size_t path_len = strlen(path);
char * file_content_key = (char *)malloc(path_len + 2); // no point of multiplying by sizeof(char)
// since the below code assumes ANSI anyways
file_content_key[0] = '~';
memcpy(&file_content_key[1], path, path_len);
file_content_key[path_len + 1] = '\0';
ret_val = s3fs_get_object(ctx->s3bucket, file_content_key, &buffer, 0, 0);
if (NULL != buffer) {
free(buffer);
}
free(file_content_key);
if (0 > ret_val) {
return -ENOENT;
}
return 0;
}
/*
* Remove a file.
*/
int fs_unlink(const char *path) {
fprintf(stderr, "fs_unlink(path=\"%s\")\n", path);
s3context_t *ctx = GET_PRIVATE_DATA;
char* cpy_path_1 = strdup(path);
char* cpy_path_2 = strdup(path);
char* d = dirname(cpy_path_1);
char* b = basename(cpy_path_2);
char* s3bucket = (char*)ctx;
s3dirent_t* dirs_rem = NULL;
ssize_t size = s3fs_get_object(s3bucket, d, (uint8_t**)&dirs_rem, 0, 0);
if (size<0) {
return -EIO; // directory does not exist
}
int entries = size/sizeof(s3dirent_t);
s3dirent_t arr[entries-1];
int i=0;
int k=0;
for (;i<entries;i++) {
if (strcasecmp(dirs_rem[i].name,b) != 0) {
arr[k] = dirs_rem[i];
k++;
}
}
s3fs_put_object(s3bucket, d, (uint8_t*)&arr, ((sizeof(s3dirent_t))*(entries-1)));
s3fs_remove_object(s3bucket, path);
return 0;
}
/*
* Read data from an open file
*
* Read should return exactly the number of bytes requested except
* on EOF or error, otherwise the rest of the data will be
* substituted with zeroes.
*/
int fs_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi) {
ssize_t ret_val = 0;
uint8_t * buffer = NULL;
fprintf(stderr, "fs_read(path=\"%s\", buf=%p, size=%d, offset=%d)\n",
path, buf, (int)size, (int)offset);
s3context_t *ctx = GET_PRIVATE_DATA;
size_t path_len = strlen(path);
char * file_content_key = (char *)malloc(path_len + 2); // no point of multiplying by sizeof(char)
// since the below code assumes ANSI anyways
file_content_key[0] = '~';
memcpy(&file_content_key[1], path, path_len);
file_content_key[path_len + 1] = '\0';
ret_val = s3fs_get_object(ctx->s3bucket, file_content_key, &buffer, offset, 0);
free(file_content_key);
if (0 == ret_val) {
return 0;
} else if (0 > ret_val) {
memset(buf, 0, size);
return -1;
}
if (size > ret_val) {
size = ret_val;
}
memcpy(buf, buffer, size);
free(buffer);
return size;
}
/* STEP 1
* Read directory. See the project description for how to use the filler
* function for filling in directory items.
*/
int fs_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset,
struct fuse_file_info *fi)
{
ssize_t ret_val = 0;
uint8_t * buffer = NULL;
s3dirent_t * dir = NULL;
fprintf(stderr, "fs_readdir(path=\"%s\", buf=%p, offset=%d)\n",
path, buf, (int)offset);
s3context_t *ctx = GET_PRIVATE_DATA;
ret_val = s3fs_get_object(ctx->s3bucket, path, &buffer, 0, 0);
if (0 > ret_val) {
return -ENOENT;
}
dir = (s3dirent_t *)buffer;
int dirent_count = ret_val / sizeof(s3dirent_t);
int i = 0;
for (; i < dirent_count; i++) {
if (0 != filler(buf, dir[i].name, NULL, 0)) {
free(buffer);
return -ENOMEM;
}
}
if (NULL != buffer) {
free(buffer);
}
return 0;
}
/*
* Remove a directory.
*/
int fs_rmdir(const char *path) {
fprintf(stderr, "fs_rmdir(path=\"%s\")\n", path);
s3context_t *ctx = GET_PRIVATE_DATA;
char* s3bucket = (char*)ctx;
s3dirent_t* dirs_r = NULL;
ssize_t s = s3fs_get_object(s3bucket, path, (uint8_t**)&dirs_r, 0, 0);
if (s<0) {
free(dirs_r);
return -EIO; // directory does not exist
}
int e = s/sizeof(s3dirent_t);
if (e>1)
{
free(dirs_r);
return -EIO; // there is more than one thing in this
}
char* cpy_path_1 = strdup(path);
char* cpy_path_2 = strdup(path);
char* d = dirname(cpy_path_1);
char* b = basename(cpy_path_2);
s3dirent_t* dirs_rem = NULL;
ssize_t size = s3fs_get_object(s3bucket, d, (uint8_t**)&dirs_rem, 0, 0);
if (size<0) {
free(dirs_r);
return -EIO; // directory does not exist
}
int entries = size/sizeof(s3dirent_t);
printf("NUM ENTRIES IN REMOVE IS %d\n", entries);
s3dirent_t arr[entries-1];
int i=0;
int k=0;
for (;i<entries;i++) {
printf("NAME? in remove %s\n", dirs_rem[i].name);
printf("base name is %s\n", b);
if (strcasecmp(dirs_rem[i].name,b) != 0) {
printf("NOT THE SAME!\n");
arr[k] = dirs_rem[i];
k++;
}
}
printf("ADDING TO NEW ARR IN REM\n");
s3fs_put_object(s3bucket, d, (uint8_t*)&arr, ((sizeof(s3dirent_t))*(entries-1)));
printf("REMOVING OBJECT (PATH) %s\n", path);
s3fs_remove_object(s3bucket, path);
free(dirs_r);
return 0;
}
int fs_getattr(const char *path, struct stat *statbuf) {
fprintf(stderr, "fs_getattr(path=\"%s\")\n", path);
s3context_t *ctx = GET_PRIVATE_DATA;
uint8_t *dir = NULL, *dir1 = NULL;
int i = 0;
char *temp_path1 = strdup(path), *temp_path2 = strdup(path), *temp_path3 = strdup(path);
char *dir_name = strdup(dirname(temp_path1)), *base_name = strdup(basename(temp_path2));
free(temp_path1); free(temp_path2);
ssize_t dir_size;
if(s3fs_get_object(ctx->s3bucket, temp_path3, &dir1, 0,0)< 0) {
fprintf(stderr,"INVALID PATH: fs_getattr\n");
free(dir_name); free(base_name); free(temp_path3);
return -ENOENT;
}
if(!strcmp(path, "/")) {
s3dirent_t *directory = (s3dirent_t *)dir1;
*statbuf = directory[0].metadata;
free(directory); free(dir_name); free(base_name);
return 0;
}
if((dir_size = s3fs_get_object(ctx->s3bucket, dir_name, &dir, 0,0))<0) {
fprintf(stderr, "INVALID PATH: fs_getattr\n");
free(temp_path3); free(base_name); free(dir_name);
return -ENOENT;
}else {
s3dirent_t *direct = (s3dirent_t*)dir;
for(;i<dir_size/sizeof(s3dirent_t);i++) {
if(!strcmp(direct[i].name,base_name)) {
if(direct[i].type == 'D') {
s3dirent_t *new_dirent = (s3dirent_t *)dir1;
*statbuf = new_dirent[0].metadata;
free(new_dirent); free(direct); free(temp_path3); free(base_name); free(dir_name);
return 0;
}
printf("FOUND A FILE\n");
*statbuf = direct[i].metadata;
free(direct); free(temp_path3); free(base_name); free(dir_name); free(dir1);
return 0;
}
}
fprintf(stderr, "FS_GETATTR: path not found\n");
free(direct);free(temp_path3); free(base_name); free(dir_name);free(dir1);
return -ENOENT;
}
}
/*
* File open operation
* No creation, or truncation flags (O_CREAT, O_EXCL, O_TRUNC)
* will be passed to open(). Open should check if the operation
* is permitted for the given flags.
*
* Optionally open may also return an arbitrary filehandle in the
* fuse_file_info structure (fi->fh).
* which will be passed to all file operations.
* (In stages 1 and 2, you are advised to keep this function very,
* very simple.)
*/
int fs_open(const char *path, struct fuse_file_info *fi) {
fprintf(stderr, "fs_open(path\"%s\")\n", path);
s3context_t *ctx = GET_PRIVATE_DATA;
char* s3bucket = (char*)ctx;
s3dirent_t* f_dirs = NULL;
ssize_t size = s3fs_get_object(s3bucket, path, (uint8_t**)&f_dirs, 0, 0);
if (size>=0){
return 0;
}
return -EIO;
}
/*
* Open directory
*
* This method should check if the open operation is permitted for
* this directory
*/
int fs_opendir(const char *path, struct fuse_file_info *fi) {
fprintf(stderr, "fs_opendir(path=\"%s\")\n", path);
s3context_t *ctx = GET_PRIVATE_DATA;
uint8_t *dir;
if(s3fs_get_object(ctx->s3bucket, path, &dir, 0,0) < 0) {
fprintf(stderr, "CANNOT ACCESS DIRECTORY: fs_opendir fail\n");
return -EIO;
}
free(dir);
return 0;
}
/*
* File open operation
* No creation, or truncation flags (O_CREAT, O_EXCL, O_TRUNC)
* will be passed to open(). Open should check if the operation
* is permitted for the given flags.
*
* Optionally open may also return an arbitrary filehandle in the
* fuse_file_info structure (fi->fh).
* which will be passed to all file operations.
* (In stages 1 and 2, you are advised to keep this function very,
* very simple.)
*/
int fs_open(const char *path, struct fuse_file_info *fi) {
fprintf(stderr, "fs_open(path\"%s\")\n", path);
s3context_t *ctx = GET_PRIVATE_DATA;
uint8_t* file;
if(s3fs_get_object(ctx->s3bucket, path, &file, 0,0)<0) {
fprintf(stderr, "INVALID PATH\n");
return -ENOENT;
}
free(file);
return 0;
}
/*
* Read data from an open file
*
* Read should return exactly the number of bytes requested except
* on EOF or error, otherwise the rest of the data will be
* substituted with zeroes.
*/
int fs_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi) {
fprintf(stderr, "fs_read(path=\"%s\", buf=%p, size=%d, offset=%d)\n",
path, buf, (int)size, (int)offset);
s3context_t *ctx = GET_PRIVATE_DATA;
char* s3bucket = (char*)ctx;
s3dirent_t* read_f_dirs = NULL;
ssize_t size_obj = s3fs_get_object(s3bucket, path, (uint8_t**)&buf, offset, size);
if (size_obj<0){
return -EIO;
printf("This path does not exist!");
}
return 0;
}
/*
* Check file access permissions. For now, just return 0 (success!)
* Later, actually check permissions (don't bother initially).
*/
int fs_access(const char *path, int mask) {
fprintf(stderr, "fs_access(path=\"%s\", mask=0%o)\n", path, mask);
s3context_t *ctx = GET_PRIVATE_DATA;
uint8_t *dir = NULL, *direct = NULL;
ssize_t dir_size;
if(s3fs_get_object(ctx->s3bucket, path, &dir, 0,0)<0) {
fprintf(stderr, "error retrieving object\n");
return -EIO;
}
char *temp_path = strdup(path), *temp_path1 = strdup(path);
char *dir_name = strdup(dirname(temp_path)), *base_name = strdup(basename(temp_path1));
free(temp_path); free(temp_path1);
if((dir_size=s3fs_get_object(ctx->s3bucket, dir_name, &direct, 0,0))<0) {
fprintf(stderr, "error retrieving object\n");
return -EIO;
}
int i = 0;
s3dirent_t *dirent = (s3dirent_t*)direct;
s3dirent_t *dir1 = (s3dirent_t*)dir;
for(;i<dir_size/sizeof(s3dirent_t);i++) {
if(!strcmp(base_name, dirent[i].name)) {
if(dirent[i].type == 'D') {
if(dir1[0].metadata.st_mode ==(dir1[0].metadata.st_mode & mask)) {
free(dir_name); free(base_name); free(dir1); free(dirent);
return 0;
}
}else {
if(dirent[i].metadata.st_mode == (dirent[i].metadata.st_mode & mask)) {
free(dir_name); free(base_name); free(dir1); free(dirent);
return 0;
}
}
}
}
//we assumed logical and would make the most sense becuase it would match up with
//the bits you want. However we could not figure it out in time.
return 0;
}
/*
* File open operation
* No creation, or truncation flags (O_CREAT, O_EXCL, O_TRUNC)
* will be passed to open(). Open should check if the operation
* is permitted for the given flags.
*
* Optionally open may also return an arbitrary filehandle in the
* fuse_file_info structure (fi->fh).
* which will be passed to all file operations.
* (In stages 1 and 2, you are advised to keep this function very,
* very simple.)
*/
int fs_open(const char *path, struct fuse_file_info *fi) {
//sommers code
fprintf(stderr, "fs_open(path\"%s\")\n", path);
s3context_t *ctx = GET_PRIVATE_DATA;
//our code
s3dirent_t * dir;
if (s3fs_get_object(ctx->s3bucket, path, (uint8_t **)&dir, 0,0)<0) //if not a real directory
{
fprintf(stderr, "file does not exist");
return -EEXIST;
}
return 0;
}
/*
* Write data to an open file
*
* Write should return exactly the number of bytes requested
* except on error.
*/
int fs_write(const char *path, const char *buf, size_t size, off_t offset, struct fuse_file_info *fi) {
fprintf(stderr, "fs_write(path=\"%s\", buf=%p, size=%d, offset=%d)\n",
path, buf, (int)size, (int)offset);
s3context_t *ctx = GET_PRIVATE_DATA;
char* s3bucket = (char*)ctx;
FILE* f = NULL;
ssize_t size_obj = s3fs_get_object(s3bucket, path, (uint8_t**)&f, offset, size);
if (size_obj<0){
return -EIO;
}
fseek(f,offset,SEEK_SET);
fwrite(buf,1,size,f);
return 0;
}
/*
* Read data from an open file
*
* Read should return exactly the number of bytes requested except
* on EOF or error, otherwise the rest of the data will be
* substituted with zeroes.
*/
int fs_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi) {
//sommers code
fprintf(stderr, "fs_read(path=\"%s\", buf=%p, size=%d, offset=%d)\n",
path, buf, (int)size, (int)offset);
s3context_t *ctx = GET_PRIVATE_DATA;
//our code
if (s3fs_get_object(ctx->s3bucket, path, (uint8_t **)&buf, offset,size)<0) //if not a real directory
{
fprintf(stderr, "failed to read file");
return -EIO;
}
return 0;
}
/* STEP 1
* Open directory
*
* This method should check if the open operation is permitted for
* this directory
*/
int fs_opendir(const char *path, struct fuse_file_info *fi) {
ssize_t ret_val = 0;
uint8_t * buffer = NULL;
fprintf(stderr, "fs_opendir(path=\"%s\")\n", path);
s3context_t *ctx = GET_PRIVATE_DATA;
ret_val = s3fs_get_object(ctx->s3bucket, path, &buffer, 0, 0);
if (0 > ret_val) {
return -ENOENT;
}
if (NULL != buffer) {
free(buffer);
}
}
/*
* Remove a file.
*/
int fs_unlink(const char *path) {
fprintf(stderr, "fs_unlink(path=\"%s\")\n", path);
s3context_t *ctx = GET_PRIVATE_DATA;
ssize_t dir_size;
int i = 0, j = 0;
uint8_t *dir;
if(fs_open(path, (struct fuse_file_info *)NULL) != 0) {
fprintf(stderr, "INVALID PATH\n");
return -ENOENT;
}
char *temp_path1 = strdup(path), *temp_path2 = strdup(path);
char *dir_name = strdup(dirname(temp_path1)), *base_name = strdup(basename(temp_path2));
free(temp_path1); free(temp_path2);
dir_size=s3fs_get_object(ctx->s3bucket, dir_name, &dir, 0, 0);
s3dirent_t* direct = (s3dirent_t*)dir;
for(;i<dir_size/sizeof(s3dirent_t);i++) {
if(!strcmp(direct[i].name, base_name)) {
i++; break;
}
}
for(;i<dir_size/sizeof(s3dirent_t);i++) {
j = i-1;
direct[j] = direct[i];
}
s3dirent_t* new_dir;
ssize_t new_dir_size;
new_dir = malloc(dir_size - sizeof(s3dirent_t));
memcpy(new_dir, direct, dir_size - sizeof(s3dirent_t));
new_dir_size = dir_size - sizeof(s3dirent_t);
printf("dir_size: %d new_dir_size: %d\n", dir_size, new_dir_size);
printf("updated directory from file remove path: %s\n",dir_name);
if(s3fs_put_object(ctx->s3bucket, dir_name, (uint8_t*)new_dir, new_dir_size)!= new_dir_size) {
fprintf(stderr, "SOMETHING WENT WRONG WHILE PUTTING TO S3: fs_unlink\n");
free(new_dir); free(direct); free(base_name); free(dir_name);
return -EIO;
}
if(s3fs_remove_object(ctx->s3bucket, path) != 0) {
fprintf(stderr, "ERROR WHILE TRYING TO DELTE FILE: fs_unlink");
free(new_dir); free(direct); free(base_name); free(dir_name);
return -EIO;
}
free(new_dir); free(direct); free(base_name); free(dir_name);
return 0;
}
/*
* Read directory. See the project description for how to use the filler
* function for filling in directory items.
*/
int fs_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset,
struct fuse_file_info *fi)
{
fprintf(stderr, "fs_readdir(path=\"%s\", buf=%p, offset=%d)\n",
path, buf, (int)offset);
s3context_t *ctx = GET_PRIVATE_DATA;
char* s3bucket = (char*)ctx;
s3dirent_t* dirs_to_read = NULL;
ssize_t size = s3fs_get_object(s3bucket, path, (uint8_t**)&dirs_to_read, 0, 0);
int entries = size/sizeof(s3dirent_t);
int i=0;
for (;i<entries;i++) {
if (filler(buf,dirs_to_read[i].name,NULL,0) != 0) {
free(dirs_to_read);
return -EIO;
}
}
free(dirs_to_read);
return 0;
}
/*
* Read directory. See the project description for how to use the filler
* function for filling in directory items.
*/
int fs_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset,
struct fuse_file_info *fi)
{
//sommers code
fprintf(stderr, "fs_readdir(path=\"%s\", buf=%p, offset=%d)\n", path, buf, (int)offset);
s3context_t *ctx = GET_PRIVATE_DATA;
//our code
s3dirent_t * dir = NULL;
if (s3fs_get_object(ctx->s3bucket, path, (uint8_t **)&dir, 0,0)<0) //if not a real directory, else store in dir
{
fprintf(stderr, "path is not valid");
free(dir);
return -EIO;
}
//check to make sure it is a directory
/*if (strcmp((*dir).type, "D")!=0) {
fprintf(stderr, "not a real directory");
return -EIO;
}*/
int i = 0;
printf("%s", "dirarray[i].type: ");
printf("%s", dir[i].type);
while(strcmp((dir[i].type),"U")!=0) {
//call filler function to fill in directory name to supplied buffer
if(filler(buf,dir[i].name, NULL, 0) != 0) {
free(dir);
return -ENOMEM;
}
i++;
}
free(dir); //free malloced dir
printf("%s\n","-----READDIR FINISHED-------------");
return 0;
}
/*
* Open directory
*
* This method should check if the open operation is permitted for
* this directory
*/
int fs_opendir(const char *path, struct fuse_file_info *fi) {
//sommers code
fprintf(stderr, "fs_opendir(path=\"%s\")\n", path);
s3context_t *ctx = GET_PRIVATE_DATA;
//our code
s3dirent_t * dir = NULL;
if (s3fs_get_object(ctx->s3bucket, path, (uint8_t **)&dir, 0,0)<0) //if not a real directory, else store in dir
{
fprintf(stderr, "path is not valid");
return -EIO;
}
//check to see if the type == "directory"
if (strcmp((*dir).type, "D")!=0) {
fprintf(stderr, "not a real directory");
free(dir);
return -EIO;
}
printf("%s\n","----finished opendir-------");
free(dir);
return 0;
}
/*
* Write data to an open file
*
* Write should return exactly the number of bytes requested
* except on error.
*/
int fs_write(const char *path, const char *buf, size_t size, off_t offset, struct fuse_file_info *fi) {
char * dir_name = dirname(strdup(path));
char * base_name = basename(strdup(path));
ssize_t ret_val = 0;
uint8_t * buffer = NULL;
fprintf(stderr, "fs_write(path=\"%s\", buf=%p, size=%d, offset=%d)\n",
path, buf, (int)size, (int)offset);
s3context_t *ctx = GET_PRIVATE_DATA;
size_t path_len = strlen(path);
char * file_content_key = (char *)malloc(path_len + 2); // no point of multiplying by sizeof(char)
// since the below code assumes ANSI anyways
file_content_key[0] = '~';
memcpy(&file_content_key[1], path, path_len);
file_content_key[path_len + 1] = '\0';
ret_val = s3fs_get_object(ctx->s3bucket, file_content_key, &buffer, 0, 0);
if (0 > ret_val) {
free(file_content_key);
return -ENOENT;
}
int new_buffer_size = ret_val + size;
uint8_t * new_buffer = (uint8_t *)malloc(new_buffer_size);
if (offset > ret_val) {
offset = ret_val;
}
memcpy(&new_buffer[offset], buf, size);
if (0 != offset) {
memcpy(new_buffer, buffer, offset);
}
if (offset < ret_val) {
memcpy(&new_buffer[offset + size], &buffer[offset], ret_val - offset);
}
free(buffer);
ret_val = s3fs_put_object(ctx->s3bucket, file_content_key, (uint8_t *)new_buffer, new_buffer_size);
free(file_content_key);
free(new_buffer);
if (-1 == ret_val) {
return -1;
}
// set the new size and times
ret_val = s3fs_get_object(ctx->s3bucket, dir_name, &buffer, 0, 0);
if (0 > ret_val) {
return -EIO;
}
s3dirent_t * entries = (s3dirent_t *)buffer;
int dirent_count = ret_val / sizeof(s3dirent_t);
int i = 0;
time_t current_time = time(NULL);
for (; i < dirent_count; i++) {
if (0 == strncmp(entries[i].name, base_name, 256)) {
entries[i].size = new_buffer_size;
entries[i].atime = current_time;
entries[i].mtime = current_time;
if (-1 == s3fs_put_object(ctx->s3bucket, dir_name, (uint8_t *)buffer, ret_val)) {
free(buffer);
return -EIO;
}
free(buffer);
return size;
}
}
free(free(buffer);
return -EIO;
}
