ttysize: new applet. +200 bytes

miscutils/ttysize.c

@@ -0,0 +1,39 @@
+/*
+ * Replacement for "stty size", which is awkward for shell script use.
+ * - Allows to request width, height, or both, in any order.
+ * - Does not complain on error, but returns default 80x24.
+ * - Size: less than 200 bytes
+ */
+#include "libbb.h"
+
+int ttysize_main(int argc, char **argv);
+int ttysize_main(int argc, char **argv)
+{
+	unsigned w,h;
+	struct winsize wsz;
+    
+	w = 80;
+	h = 24;
+	if (!ioctl(0, TIOCGWINSZ, &wsz)) {
+		w = wsz.ws_col;
+		h = wsz.ws_row;
+	}
+
+	if (argc == 1) {
+		printf("%u %u", w, h);
+	} else {
+		const char *fmt, *arg;
+
+		fmt = "%u %u" + 3; /* "%u" */
+		while ((arg = *++argv) != NULL) {
+			char c = arg[0];
+			if (c == 'w')
+				printf(fmt, w);
+			if (c == 'h')
+				printf(fmt, h);
+			fmt = "%u %u" + 2; /* " %u" */
+		}
+	}
+	putchar('\n');
+	return 0;
+}