removal of unnecessary null check, during testing it was never null

Makefile

@@ -1,7 +1,6 @@
 CC := gcc
 CFLAGS := -Wall -Wextra -O2 -flto=auto
-CURSES := -lncursesw -ltinfow #utf8 support
-#CURSES := -lncurses -tinfo #no utf8
+CURSES := $(shell pkg-config --libs ncurses)
 CFLAGS_DEBUG := $(CFLAGS) -g
 CFLAGS_PROFILE := $(CFLAGS) -pg
 GDB := gdb --tui ./th

dir.c

@@ -315,14 +315,6 @@ void print_dir(WINDOW *win, char print_info, unsigned long *dir_file_count, file
 		} else {
 			mvwaddnstr(win, i-offset_vertical, 0, file_name, line_width);
 		}
-		if (file_name != NULL) {
-			/* sometimes NULL remains, need to do deeper analysis soon */
-			free(file_name);
-		} else {
-			printf("file_name remains NULL on %s, if this happens consistent on the same file, please inform me", dir_content[i].file_name);
-			volatile static int debug_print_dir;
-			debug_print_dir++;
-		}
 		if (dir_content[i].status & FILE_STATUS_SELECTED) {
 			wattroff(win, COLOR_PAIR(8));
 		} else {

main.c

@@ -22,6 +22,7 @@ unsigned int settings;
 unsigned int file_modifiers;
 unsigned int status = (STATUS_RUN_BACKEND | STATUS_UPDATE_SCREEN_MASK | STATUS_RELOAD_DIRECTORY); 
 char *start_path;
+char *global_path;
 time_t *seed;
 
 WINDOW *win_t;
@@ -91,6 +92,7 @@ int main(){
 			temp_heigth = terminal_height;
 		}
 		if (status & STATUS_RUN_BACKEND) {
+			global_path = getcwd(NULL, 0);
 			pthread_cond_signal(&cond_top);
 			pthread_cond_signal(&cond_mid);
 			pthread_cond_signal(&cond_lft);
@@ -198,6 +200,7 @@ void init() {
 	#endif
 
 	ESCDELAY = 10;
+	global_path = getcwd(NULL, 0);
 	char *start_path = getcwd(NULL, 0);
 	setenv("START_PATH", start_path, 0);
 	free(start_path);

threading.c

@@ -47,6 +47,7 @@ volatile unsigned long selected_file_current = 0;
 volatile unsigned long selected_file_last = 0;
 extern unsigned int terminal_width;
 extern unsigned int status;
+extern char *global_path;
 
 unsigned int btm_status;
 
@@ -58,48 +59,49 @@ void *thread_mid(){
 		pthread_cond_wait(&cond_mid, &mutex_mid);
 		unsigned int local_status = status;
 
-		char *path;
-		if((path=getcwd(NULL, 0)) == NULL) {
+		if (global_path == NULL) {
 			mid_content = malloc(sizeof(file));
 			mid_content->file_name = "cannot open directory";
 			mid_file_count = 1;
-		} else {
+			pthread_mutex_unlock(&mutex_mid);
+			continue;
+		} 
+		char *path = malloc(strlen(global_path)+1);
+		memcpy(path, global_path, strlen(global_path)+1);
 
-
-			if (local_status & STATUS_RELOAD_DIRECTORY) {
-				unsigned long i = 0;
-				for (i = 0; i < mid_file_count; i++) {
-					free(mid_content[i].file_name);
-				}
-				free(mid_content);
-				mid_file_count = get_dir_size(path);
-				if (mid_file_count != 0) {
-					mid_content = malloc(mid_file_count * sizeof(file));
-					memset(mid_content, '\0', mid_file_count * sizeof(file));
-					get_dir_content(path, &mid_file_count, mid_content);
-				} else {
-					selected_file_current = 0;
-					mid_content = malloc(sizeof(file));
-					mid_content->file_type = 0;
-					mid_content->file_size = 0;
-					mid_content->permissions = 0;
-					mid_content->color_pair = 0;
-					mid_content->file_name = malloc(sizeof(char));
-					mid_content->file_name[0] = '\0';
-
-					mid_file_count = 0;
-
-				}
-				pthread_mutex_lock(&mutex_selection);
-				update_selected_file();
-				pthread_mutex_unlock(&mutex_selection);
+		if (local_status & STATUS_RELOAD_DIRECTORY) {
+			unsigned long i = 0;
+			for (i = 0; i < mid_file_count; i++) {
+				free(mid_content[i].file_name);
 			}
+			free(mid_content);
+			mid_file_count = get_dir_size(path);
+			if (mid_file_count != 0) {
+				mid_content = malloc(mid_file_count * sizeof(file));
+				memset(mid_content, '\0', mid_file_count * sizeof(file));
+				get_dir_content(path, &mid_file_count, mid_content);
+			} else {
+				selected_file_current = 0;
+				mid_content = malloc(sizeof(file));
+				mid_content->file_type = 0;
+				mid_content->file_size = 0;
+				mid_content->permissions = 0;
+				mid_content->color_pair = 0;
+				mid_content->file_name = malloc(sizeof(char));
+				mid_content->file_name[0] = '\0';
 
-			btm_status = local_status;
-			pthread_cond_signal(&cond_rgt);
-			pthread_cond_signal(&cond_btm);
+				mid_file_count = 0;
 
+			}
+			pthread_mutex_lock(&mutex_selection);
+			update_selected_file();
+			pthread_mutex_unlock(&mutex_selection);
 		}
+
+		btm_status = local_status;
+		pthread_cond_signal(&cond_rgt);
+		pthread_cond_signal(&cond_btm);
+
 		free(path);
 		pthread_mutex_unlock(&mutex_mid);
 	}
@@ -112,13 +114,18 @@ void *thread_lft(){
 		pthread_cond_wait(&cond_lft, &mutex_lft);
 		unsigned int local_status = status;
 
-		char *path;
-		if((path=getcwd(NULL, 0)) == NULL) {
+		if (global_path == NULL) {
 			lft_content = malloc(sizeof(file));
 			lft_content[0].file_name = "cannot open directory";
 			lft_file_count = 1;
-		} else {
+			pthread_mutex_unlock(&mutex_lft);
+			continue;
+		} 
+		char *path = malloc(strlen(global_path)+1);
+		memcpy(path, global_path, strlen(global_path)+1);
 
+		if (strcmp(path, "/") != 0) {
+			path[strrchr(path, '/')-path+1] = '\0';
 			path[strrchr(path, '/')-path] = '\0';
 			path[0] = '/';
 
@@ -129,8 +136,11 @@ void *thread_lft(){
 				memset(lft_content, '\0', lft_file_count * sizeof(file));
 				get_dir_content(path, &lft_file_count, lft_content);
 			}
-
+		} else {
+			lft_file_count = 0;
 		}
+
+
 		free(path);
 		pthread_mutex_unlock(&mutex_lft);
 	}
@@ -230,18 +240,17 @@ void *thread_top(){
 
 		free(top_buffer);
 
-		char *path;
-		if((path=getcwd(NULL, 0)) == NULL) {
+		if(global_path == NULL) {
 			top_buffer = malloc(sizeof("cannot open directory"));
 			top_width = sizeof("cannot open directory");
 			top_buffer = "cannot open directory";
-		} else {
-			top_buffer = malloc(strlen(path)+1);
-			memcpy(top_buffer, path, strlen(path)+1);
-			top_width = strlen(top_buffer);
-		}
+			pthread_mutex_unlock(&mutex_top);
+			continue;
+		} 
+		top_buffer = malloc(strlen(global_path)+1);
+		memcpy(top_buffer, global_path, strlen(global_path)+1);
+		top_width = strlen(top_buffer);
 
-		free(path);
 		pthread_mutex_unlock(&mutex_top);
 	}
 	pthread_exit(0);
@@ -271,14 +280,6 @@ void *thread_btm(){
 			pthread_mutex_unlock(&mutex_mid);
 
 
-			if (path != NULL) {
-				/* sometimes NULL remains, need to do deeper analysis soon */
-				free(path);
-				path = NULL;
-			} else {
-				volatile static int debug_thread_btm;
-				debug_thread_btm++;
-			}
 			free(ui_btm_right_block);
 
 			path = getcwd(NULL, 0);