1#include <unistd.h>
2#include <fcntl.h>
3#include "fdleak.h"
4
5int main (int argc, char **argv)
6{
7   int s1;
8   int s2;
9
10   CLOSE_INHERITED_FDS;
11
12   s1 = DO( open("/dev/null", O_RDONLY) );
13   s2 = DO( open("/dev/null", O_RDONLY) );
14
15   (void) DO( dup2(s1, 20) );  // dup s1 as fd 20
16   (void) DO( dup2(s1, s2) );  // dup s1 as fd s2, which closes existing s2 fd
17
18   return 0;
19}
20