Add xcb_send_fd API

This uses sendmsg to transmit file descriptors from the application to
the X server

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-By: Uli Schlachter <psychon@znc.in>

1 files changed, 19 insertions, 0 deletions

diff --git a/src/xcbint.h b/src/xcbint.h
index f9e5a52..aaf6685 100644
--- a/src/xcbint.h
+++ b/src/xcbint.h
@@ -34,6 +34,10 @@
 #include "config.h"
 #endif
 
+#if HAVE_SENDMSG
+#include <sys/socket.h>
+#endif
+
 #ifdef GCC_HAS_VISIBILITY
 #pragma GCC visibility push(hidden)
 #endif
@@ -79,6 +83,18 @@ void *_xcb_map_remove(_xcb_map *q, unsigned int key);
 
 /* xcb_out.c */
 
+typedef void (*xcb_return_socket_func_t)(void *closure);
+
+#if HAVE_SENDMSG
+#define XCB_MAX_PASS_FD	16
+
+typedef struct _xcb_fd {
+    struct cmsghdr cmsghdr;
+    int fd[XCB_MAX_PASS_FD];
+    int nfd;
+} _xcb_fd;
+#endif
+
 typedef struct _xcb_out {
     pthread_cond_t cond;
     int writing;
@@ -100,6 +116,9 @@ typedef struct _xcb_out {
         xcb_big_requests_enable_cookie_t cookie;
         uint32_t value;
     } maximum_request_length;
+#if HAVE_SENDMSG
+    _xcb_fd out_fd;
+#endif
 } _xcb_out;
 
 int _xcb_out_init(_xcb_out *out);