Exit program if window size is too small

ccc.c

@@ -21,6 +21,7 @@
 #include "util.h"
 
 /* functions' definitions */
+void handle_sigwinch();
 void cleanup();
 void show_help();
 int read_key();
@@ -108,6 +109,16 @@ int main(int argc, char **argv)
 	if (!isatty(STDIN_FILENO)) 
 		die("ccc: No tty detected. ccc requires an interactive shell to run.\n");
 
+	struct sigaction sa;
+	sa.sa_handler = handle_sigwinch;
+	sa.sa_flags = SA_RESTART;
+	sigemptyset(&sa.sa_mask);
+
+	if (sigaction(SIGWINCH, &sa, NULL) == -1) {
+		perror("sigaction");
+		exit(1);
+	}
+
 	/* initialize screen, don't print special chars,
 	 * make ctrl + c work, don't show cursor 
 	 * enable arrow keys */
@@ -131,10 +142,8 @@ int main(int argc, char **argv)
 	getcwd(cwd, PATH_MAX);
 	p_cwd = memalloc(PATH_MAX);
 	p_cwd[0] = '\0';
-	get_window_size(&rows, &cols);
-
-	half_width = cols / 2 + WINDOW_OFFSET;
 	populate_files(cwd, 0, &files);
+	handle_sigwinch();
 
 	if (to_open_file) {
 		sel_file = arraylist_search(files, argv_cp, true);
@@ -144,10 +153,7 @@ int main(int argc, char **argv)
 	int ch, ch2;
 	int run = 1;
 	while (run) {
-		if (cols < 80 || rows < 24) {
-			cleanup();
-			die("ccc: Terminal size needs to be at least 80x24");
-		}
+		
 		ch = read_key();
 		switch (ch) {
 			/* quit */
@@ -406,6 +412,17 @@ int main(int argc, char **argv)
 	return 0;
 }
 
+void handle_sigwinch()
+{
+	get_window_size(&rows, &cols);
+	if (cols < 80 || rows < 24) {
+		cleanup();
+		die("ccc: Terminal size needs to be at least 80x24");
+	}
+	half_width = cols / 2 + WINDOW_OFFSET;
+	list_files();
+}
+
 void cleanup()
 {
 	if (argv_cp != NULL)

config.h

@@ -19,7 +19,7 @@ In COLS:
 0 will make them equal (at the center),
 15 will make files bigger
 -15 will make preview bigger */
-#define WINDOW_OFFSET -65
+#define WINDOW_OFFSET -30
 
 /* Options */
 #define SHOW_HIDDEN true    /* show hidden files/dotfiles at startup */