Switched to using raw mode, which allows me to capture the 'Ctrl+s' keypress. I have implemented save functionality using this keypress, and implemented functionality to capture Ctrl-C as well.

editor.c

@@ -5,6 +5,9 @@
 #include <string.h>
 #include <stdbool.h>
 #include <unistd.h>
+#include <sys/stat.h>
+
+#define ctrl(x) ((x) & 0x1f)
 
 int index_to_start = 0;
 
@@ -146,22 +149,51 @@ void page_up_handler(Buffer* buffer) {
 
 }
 
+int is_file(char* path) {
+	struct stat st;
+	if (stat(path, &st) < 0) {
+		return -1;
+	}
+	return S_ISREG(st.st_mode);
+}
+
+void save_text_helper(Buffer* buffer,char* filename) {
+	if (is_file(filename) == 1) {
+		FILE* file = fopen(filename,"w");
+
+		int i = 0;
+		while (i < buffer->size) {
+			if ((buffer->start - buffer->text) == i) {  /* If we have encountered
+									the start of the gap */
+				i += buffer->gap_size;
+			}
+	
+			if (i >= buffer->size) {
+				break;
+			}
+
+			fputc(*(buffer->text + i),file);
+			i++;
+		}
+	}
+
+}
+
 void init_curses() {
 	initscr();
 	noecho();
 	keypad(stdscr,TRUE);
-	cbreak();
+	raw();
 //	scrollok(stdscr,TRUE);
 }
 
-void sigint_handler(int dummy) {
+void end_ncurses() {
 	endwin();
 	exit(130);
 }
 
 int main(int argc, char** argv) {
 
-	signal(SIGINT,sigint_handler);
 	Buffer* buffer = new_buffer(10);
 	FILE* logfile = fopen("logfile.txt","w");
 
@@ -246,13 +278,25 @@ int main(int argc, char** argv) {
 				break;
 
 			case KEY_NPAGE:
-				page_down_handler(buffer);			
+				page_down_handler(buffer);
 				break;
 
 			case KEY_PPAGE:
 				page_up_handler(buffer);
 				break;
 
+			case ctrl('s'):
+				if (argc == 2) {
+					save_text_helper(buffer,argv[1]);
+				} else if (argc == 1) {
+					save_text_helper(buffer,NULL);
+				}
+				break;
+
+			case ctrl('c'):
+				end_ncurses();
+				break;
+
 			default:
 				buffer_insert(ch,buffer);