tests/compat/pipe2.c: Add create_issue_1069_sentinels() and call it from socketpair() to gain evidence whether issue #1069 is fixed

1 files changed, 19 insertions, 0 deletions

diff --git a/tests/compat/pipe2.c b/tests/compat/pipe2.c
index 7600783..c27a858 100644
--- a/tests/compat/pipe2.c
+++ b/tests/compat/pipe2.c
@@ -35,6 +35,22 @@ static int setfl(int fd, int flag)
         return rc;
 }
 
+/*
+ * Have open() temporarily use up file descriptors until reaching beyond the
+ * allocated sockets, then leak the ones conflicting with any of the latter.
+ */
+static void create_issue_1069_sentinels(int socket_vector[2])
+{
+        int fd = open("CONIN$", O_RDONLY);
+        if (fd == -1 || fd > socket_vector[0] && fd > socket_vector[1]) {
+                return;
+        }
+        create_issue_1069_sentinels(socket_vector);
+        if (fd != socket_vector[0] && fd != socket_vector[1]) {
+                close(fd);
+        }
+}
+
 int socketpair(int domain, int type, int protocol, int socket_vector[2])
 {
         if (domain != AF_UNIX || !(type & SOCK_STREAM) || protocol != PF_UNSPEC)
@@ -85,6 +101,9 @@ int socketpair(int domain, int type, int protocol, int socket_vector[2])
                 goto err;
 
         closesocket(listener);
+
+        create_issue_1069_sentinels(socket_vector);
+
         return 0;
 
 err: