Second CTFs part

lab1_2_recap/04_the_whispering_wall/main(3).c

@@ -0,0 +1,30 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+void setup() {
+    setvbuf(stdin, NULL, _IONBF, 0);
+    setvbuf(stdout, NULL, _IONBF, 0);
+    setvbuf(stderr, NULL, _IONBF, 0);
+}
+
+void win() {
+    puts("How did you fit through that tiny window?!");
+    system("/bin/sh");
+}
+
+void vuln() {
+    char whisper[16];
+
+    puts("Psst! This is the whispering wall.");
+    puts("Only tiny messages allowed... or are they?");
+    puts("whisper:");
+
+    gets(whisper);
+}
+
+int main() {
+    setup();
+    vuln();
+    return 0;
+}