Check file handle in C using system calls

chp2/ftruncate.c

@@ -0,0 +1,13 @@
+#include <unistd.h>
+#include <stdio.h>
+
+int main(void) {
+	int ret;
+
+	ret = truncate("./pirate.txt", 45);
+	if (ret == -1) {
+		perror("truncate");
+		return -1;
+	}
+	return 0;
+}