[PATCH v2 4/5] Cygwin: AF_LOCAL: fix fcntl and dup if O_PATH is set

[Ken Brown]

For fcntl this requires a new method, fhandler_socket_local::fcntl,
which calls fhandler_base::fcntl if O_PATH is set and
fhandler_socket_wsock::fcntl otherwise.
---
 winsup/cygwin/fhandler.h               |  1 +
 winsup/cygwin/fhandler_socket_local.cc | 12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/winsup/cygwin/fhandler.h b/winsup/cygwin/fhandler.h
index c54780ef6..1b477f633 100644
--- a/winsup/cygwin/fhandler.h
+++ b/winsup/cygwin/fhandler.h
@@ -836,6 +836,7 @@ class fhandler_socket_local: public fhandler_socket_wsock
 
   int open (int flags, mode_t mode = 0);
   int close ();
+  int fcntl (int cmd, intptr_t);
   int __reg2 fstat (struct stat *buf);
   int __reg2 fstatvfs (struct statvfs *buf);
   int __reg1 fchmod (mode_t newmode);
diff --git a/winsup/cygwin/fhandler_socket_local.cc 
b/winsup/cygwin/fhandler_socket_local.cc
index 76815a611..531f574b0 100644
--- a/winsup/cygwin/fhandler_socket_local.cc
+++ b/winsup/cygwin/fhandler_socket_local.cc
@@ -628,6 +628,9 @@ fhandler_socket_local::af_local_set_secret (char *buf)
 int
 fhandler_socket_local::dup (fhandler_base *child, int flags)
 {
+  if (get_flags () & O_PATH)
+    return fhandler_base::dup (child, flags);
+
   fhandler_socket_local *fhs = (fhandler_socket_local *) child;
   fhs->set_sun_path (get_sun_path ());
   fhs->set_peer_sun_path (get_peer_sun_path ());
@@ -654,6 +657,15 @@ fhandler_socket_local::close ()
     return fhandler_socket_wsock::close ();
 }
 
+int
+fhandler_socket_local::fcntl (int cmd, intptr_t arg)
+{
+  if (get_flags () & O_PATH)
+    return fhandler_base::fcntl (cmd, arg);
+  else
+    return fhandler_socket_wsock::fcntl (cmd, arg);
+}
+
 int __reg2
 fhandler_socket_local::fstat (struct stat *buf)
 {
-- 
2.21.0