int search_inode_in_folder(int folder_number, const char *node_name)
{
int result = -1;
if (folder_number >= 0 && node_name != NULL)
{
inode_t *folder = (inode_t *)get_block(folder_number);
if (folder != NULL)
{
if (folder->status == BLOCK_STATUS_FOLDER)
{
char name[NODE_NAME_MAX_SIZE];
int *start = (int *)folder->content;
int *end = (int *)((void *)folder + size_of_block);
while (start < end)
{
if (*start > 0 && get_inode_name(*start, name) == 0 && strcmp(node_name, name) == 0)
{
result = *start;
break;
}
start++;
}
}
destroy_block(folder);
}
}
return result;
}
static void destroy_value(struct lp_value *v) {
int d;
switch(v->t) {
case S:
free(v->v.s);
break;
case LIST:
destroy_list(v->v.l);
break;
case I:
case D: break;
case TOPOSPEC:
for(d = 0; d < v->v.t.len; d++)
destroy_topospec(&v->v.t.l[d]);
free(v->v.t.l);
break;
default:
destroy_block(v->v.b);
}
free(v);
}
int remove_node_from_folder(int folder_number, int node_number)
{
int result = -1;
if (folder_number >= 0 && node_number > 0)
{
inode_t *folder = (inode_t *)get_block(folder_number);
if (folder != NULL)
{
if (folder->status == BLOCK_STATUS_FOLDER)
{
int *start = (int *)folder->content;
int *end = (int *)((void *)folder + size_of_block);
while (start < end)
{
if (*start == node_number)
{
*start = 0;
break;
}
start++;
}
if (start < end)
{
result = write_block(folder_number, folder);
}
else
{
result = 0;
}
}
destroy_block(folder);
}
}
return result;
}
int create_file(const char *name, mode_t mode, dev_t dev)
{
int number = search_free_block();
if (number >= 0)
{
inode_t *file = (inode_t *)create_block();
if (file != NULL)
{
int name_size = strlen(name) + 1;
if (name_size > NODE_NAME_MAX_SIZE)
{
name_size = NODE_NAME_MAX_SIZE;
}
file->status = BLOCK_STATUS_FILE;
memcpy(file->name, name, name_size);
file->stat.st_mode = S_IFREG | mode;
file->stat.st_rdev = dev;
file->stat.st_nlink = 1;
if (write_block(number, file) != 0)
{
number = -1;
}
destroy_block(file);
}
}
return number;
}
int create_folder(const char *name, mode_t mode)
{
int number = search_free_block();
if (number >= 0)
{
inode_t *folder = (inode_t *)create_block();
if (folder != NULL)
{
int name_size = strlen(name) + 1;
if (name_size > NODE_NAME_MAX_SIZE)
{
name_size = NODE_NAME_MAX_SIZE;
}
folder->status = BLOCK_STATUS_FOLDER;
memcpy(folder->name, name, name_size);
folder->stat.st_mode = S_IFDIR | mode;
folder->stat.st_nlink = 2;
if (write_block(number, folder) != 0)
{
number = -1;
}
destroy_block(folder);
}
}
return number;
}
bool FunctionBlockLoader::unloadFunctionBlock(brics_3d::rsg::FunctionBlockModuleInfo& module) {
if ((module.functionBlock) == 0 || (module.moduleHandle == 0)) {
LOG(ERROR) << "FunctionBlockLoader::unloadFunctionBlock invalid module meta-data for block " << module.name;
return false;
}
destroy_t* destroy_block = (destroy_t*) dlsym(module.moduleHandle, "destroy");
const char* dlsym_error = dlerror();
if (dlsym_error) {
LOG(ERROR) << "FunctionBlockLoader: Cannot load symbol destroy: " << dlsym_error << '\n';
return false;
}
// destroy the class
destroy_block(FunctionBlockLoader::moduleToBlock(module));
module.functionBlock = 0;
// unload
dlclose(module.moduleHandle);
module.moduleHandle = 0;
LOG(DEBUG) << "FunctionBlockLoader: block " << module.name << " successfully unloaded.";
return true;
}
void delete_blocks(struct group *group, block **blocks, size_t count)
{
detatch_blocks(group, blocks, count);
for (size_t i = 0; i < count; ++i)
{
destroy_block(blocks[i]);
}
}
void place_and_destroy_blocks(SDL_Surface *scr, int x, int y, struct Player *p) {
// if mouse button is pressed and player moves cursor out of the screen, x and y could be negative
if((x > 0) && (y > 0)) {
if(input.mleft) {
destroy_block(scr, x, y);
}
if(input.mright) {
place_block(x, y, p);
}
}
}
/*
Returns 0 if it is a destructable block, 1 if it is indestructable, 2 otherwise.
If the block is destructable, a function is called to destroy it.
Matt Woodske
Jerrod Hudson
*/
int
block_here(const int x, const int y)
{
if (grid[y][x] == GRID_DBLOCK) {
destroy_block(x,y);
return 0;
}
if (grid[y][x] == GRID_UBLOCK)
return 1;
else
return 2;
}
void *get_block(int number)
{
void *block = NULL;
if (number >= 0)
{
block = create_block();
if (block != NULL && read_block(number, block) != 0)
{
destroy_block(block);
block = NULL;
}
}
return block;
}
void cleanup_outbreak(Outbreak * outbreak) {
int i;
for (i = 0; i < outbreak->num_blocks; i++) {
destroy_block(outbreak->blocks[i]);
outbreak->blocks[i] = NULL;
}
outbreak->num_blocks = 0;
destroy_ball(outbreak->ball);
outbreak->ball = NULL;
destroy_player(outbreak->player);
outbreak->player = NULL;
}
int clear_block(int number)
{
int result = -1;
if (number >= 0 && lseek(filesystem_fd, size_of_block * number, SEEK_SET) >= 0)
{
void *block = create_block();
if (block != NULL)
{
if (write_block(number, block) == 0)
{
result = 0;
}
destroy_block(block);
}
}
return result;
}
int create_root()
{
int result = -1;
inode_t *root = (inode_t *)create_block();
if (root != NULL)
{
root->status = BLOCK_STATUS_FOLDER;
root->name[0] = '\0';
root->stat.st_mode = S_IFDIR | 0777;
root->stat.st_nlink = 2;
if (write_block(number_of_root_block, root) == 0)
{
result = 0;
}
destroy_block(root);
}
return result;
}
void lp_release_typetbl(void) {
int c;
for(c = 0; c < lp_typetbl_len; c++) {
if(!lp_typetbl[c]) continue;
if(lp_typetbl[c]->spec)
destroy_block(lp_typetbl[c]->spec);
if(lp_typetbl[c]->sub)
free(lp_typetbl[c]->sub);
if(lp_typetbl[c]->super)
free(lp_typetbl[c]->super);
free(lp_typetbl[c]);
}
free(lp_typetbl);
}
int remove_folder(int number)
{
int result = -1;
inode_t *folder = (inode_t *)get_block(number);
if (folder != NULL)
{
int *start = (int *)folder->content;
int *end = (int *)((void *)folder + size_of_block);
while (start < end)
{
if (*start > 0)
{
remove_block(*start);
}
start++;
}
destroy_block(folder);
result = set_block_status(number, BLOCK_STATUS_FREE);
}
return result;
}
static void release_groupdata(struct groupdata *groupdata)
{
if (groupdata && --groupdata->refcount == 0)
{
size_t blockcount = ptrarray_count(groupdata->blocks);
for (size_t i = 0; i < blockcount; ++i)
{
destroy_block(get_ptrarray(groupdata->blocks, i));
}
size_t groupcount = ptrarray_count(groupdata->groups);
for (size_t i = 0; i < groupcount; ++i)
{
destroy_group(get_ptrarray(groupdata->groups, i));
}
destroy_ptrarray(groupdata->blocks);
destroy_ptrarray(groupdata->groups);
destroy_buffer(groupdata->vertices);
free(groupdata);
}
}
/**
* Main program execution
*/
int main (int argc, char *argv[]) {
TOKENIZER *tokenizer;
char string[1024] = "";
char *tok;
int br;
int most_recent_job = 0;
ProcessMap *jobs = new_map();
//Set up signal handling
signal(SIGINT, SIG_IGN);
signal(SIGTSTP, SIG_IGN);
signal(SIGTTOU, SIG_IGN);
signal(SIGTTIN, SIG_IGN);
signal(SIGTERM, SIG_IGN);
string[1023] = '\0'; /* ensure that string is always null-terminated */
printf("\nEnter a command or type ctrl-d to end session.\n" );
write(1, "\nmy-sh$ ", 8);
//Input loop
while ((br = read( STDIN_FILENO, string, 1023 )) > 0) {
if (br <= 1) {
write(1, "my-sh$ ", 8);
continue;
}
string[br-1] = '\0';
tokenizer = init_tokenizer(string);
//Create linked list of tokens
LinkedList *input_command = new_list(256);
while( (tok = get_next_token( tokenizer )) != NULL ) {
push_back(input_command, tok);
free(tok);
}
free_tokenizer(tokenizer);
int executed = 0;
int error = 0;
//Checks for fg or bg
if (get_length(input_command) == 1) {
char *only_token = pop_back(input_command);
if (compare_strings(only_token, "fg")) {
if (move_to_foreground(jobs, &most_recent_job) == -1)
error = 1;
executed = 1;
} else if (compare_strings(only_token, "bg")) {
if (move_to_background(jobs, &most_recent_job) == -1)
error = 1;
executed = 1;
} else {
push_back(input_command, only_token);
}
free(only_token);
}
//Process input for pipes or background if an error has already been detected, go to the next command
if (!executed && !error) {
//Sees if a background ampersand is detected
bool is_background = determine_background(input_command);
LinkedList *full_command = copy_list(input_command);
if (is_background) {
printf("Running: ");
print_list(input_command);
}
//Test for pipes
bool is_pipe = false;
LinkedList *first_command_list = new_list(50);
LinkedList *second_command_list = new_list(50);
int valid_pipe = find_piping(input_command, &is_pipe, first_command_list, second_command_list);
//Command blocks are created from the command lists
CommandBlock *first_command = new_command_block(first_command_list);
CommandBlock *second_command = new_command_block(second_command_list);
//Runs a function to check that there are no invalid redirections in the case of a piping
if (is_pipe) {
valid_pipe = valid_pipe && check_pipe(first_command, second_command);
}
//Notifies user of any incorrect pipe commands
if (!is_pipe && !first_command->valid) {
printf("Invalid command structure\n");
} else if (is_pipe && (!first_command->valid || !second_command->valid || !valid_pipe) ) {
printf("Invalid command structure\n");
}
//If it is a pipe and all necessary conditions are valid, then the piping occurs
if (is_pipe && first_command->valid && second_command->valid && valid_pipe) {
if (pipe_job (first_command, second_command, is_background, full_command, jobs, &most_recent_job)
== -1)
error = 1;
}
// No piping
else if (!is_pipe && first_command->valid) {
if (job (first_command, is_background, full_command, jobs, &most_recent_job) == -1)
error = 1;
}
destroy_list(first_command_list);
destroy_list(second_command_list);
destroy_block(first_command);
destroy_block(second_command);
destroy_list(full_command);
}
destroy_list(input_command);
monitor_background_jobs (jobs, &most_recent_job);
if (error)
perror("ERROR ");
write(1, "my-sh$ ", 8);
}
destroy_map(jobs);
printf( "\nSession ended\n" );
return 0;
}
