coccinelle/take-fd.cocci

   1 @@
   2 local idexpression p;
   3 expression q;
   4 @@
   5 - p = q;
   6 - q = -1;
   7 - return p;
   8 + return TAKE_FD(q);
   9
  10 /* The ideal solution would use 'local idexpression' to avoid matching errno,
  11  * which is a global variable. However, 'idexpression' nor 'identifier'
  12  * would match, for example, "x->fd", which is considered 'expression' in
  13  * the SmPL grammar
  14  */
  15 @@
  16 expression p != errno;
  17 expression q;
  18 @@
  19 - p = q;
  20 - q = -1;
  21 + p = TAKE_FD(q);