rspreload: Support dup2 calls

vsftpd requires dup2() support.  To handle dup2, we need to add
reference count tracking to the preload fd's.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>

diff --git a/src/preload.c b/src/preload.c
index a6801434688902131903fe4d49d9226c34e52692..4b891a10e2ecb6b920359dd813262beaae571568 100644 (file)
--- a/src/preload.c
+++ b/src/preload.c
@@ -886,3 +886,10 @@ int fcntl(int socket, int cmd, ... /* arg */)
        va_end(args);
        return ret;
 }
+
+int dup2(int oldfd, int newfd)
+{
+       int fd;
+       return (fd_get(oldfd, &fd) == fd_rsocket) ?
+               : dup2(oldfd, newfd);
+}