generator: support listelement-ref

[free-sw/xcb/libxcb] / src / xcb_in.c

diff --git a/src/xcb_in.c b/src/xcb_in.c
index 8c3a58c..ad870c1 100644 (file)
--- a/src/xcb_in.c
+++ b/src/xcb_in.c
@@ -36,9 +36,6 @@
 #include <stdio.h>
 #include <errno.h>
 
-#include "xcb.h"
-#include "xcbext.h"
-#include "xcbint.h"
 #if USE_POLL
 #include <poll.h>
 #endif
@@ -51,6 +48,10 @@
 #include "xcb_windefs.h"
 #endif /* _WIN32 */
 
+#include "xcb.h"
+#include "xcbext.h"
+#include "xcbint.h"
+
 #define XCB_ERROR 0
 #define XCB_REPLY 1
 #define XCB_XGE_EVENT 35
@@ -200,9 +201,9 @@ static int read_packet(xcb_connection_t *c)
             c->in.request_completed = c->in.request_read - 1;
         }
 
-        while(c->in.pending_replies && 
+        while(c->in.pending_replies &&
               c->in.pending_replies->workaround != WORKAROUND_EXTERNAL_SOCKET_OWNER &&
-             XCB_SEQUENCE_COMPARE (c->in.pending_replies->last_request, <=, c->in.request_completed))
+              XCB_SEQUENCE_COMPARE (c->in.pending_replies->last_request, <=, c->in.request_completed))
         {
             pending_reply *oldpend = c->in.pending_replies;
             c->in.pending_replies = oldpend->next;
@@ -386,11 +387,11 @@ static int read_block(const int fd, void *buf, const ssize_t len)
             FD_ZERO(&fds);
             FD_SET(fd, &fds);
 
-           /* Initializing errno here makes sure that for Win32 this loop will execute only once */
-           errno = 0;  
-           do {
-               ret = select(fd + 1, &fds, 0, 0, 0);
-           } while (ret == -1 && errno == EINTR);
+            /* Initializing errno here makes sure that for Win32 this loop will execute only once */
+            errno = 0;
+            do {
+                ret = select(fd + 1, &fds, 0, 0, 0);
+            } while (ret == -1 && errno == EINTR);
 #endif /* USE_POLL */
         }
         if(ret <= 0)
@@ -746,7 +747,7 @@ xcb_register_for_special_xge(xcb_connection_t *c,
         pthread_mutex_unlock(&c->iolock);
         return NULL;
     }
-            
+
     se->extension = ext_reply->major_opcode;
     se->eid = eid;
 
@@ -888,13 +889,16 @@ int _xcb_in_read(xcb_connection_t *c)
         .iov_base = c->in.queue + c->in.queue_len,
         .iov_len = sizeof(c->in.queue) - c->in.queue_len,
     };
-    char cmsgbuf[CMSG_SPACE(sizeof(int) * XCB_MAX_PASS_FD)];
+    union {
+        struct cmsghdr cmsghdr;
+        char buf[CMSG_SPACE(XCB_MAX_PASS_FD * sizeof(int))];
+    } cmsgbuf;
     struct msghdr msg = {
         .msg_name = NULL,
         .msg_namelen = 0,
         .msg_iov = &iov,
         .msg_iovlen = 1,
-        .msg_control = cmsgbuf,
+        .msg_control = cmsgbuf.buf,
         .msg_controllen = CMSG_SPACE(sizeof(int) * (XCB_MAX_PASS_FD - c->in.in_fd.nfd)),
     };
     n = recvmsg(c->fd, &msg, 0);
@@ -915,11 +919,13 @@ int _xcb_in_read(xcb_connection_t *c)
 #if HAVE_SENDMSG
         struct cmsghdr *hdr;
 
-        for (hdr = CMSG_FIRSTHDR(&msg); hdr; hdr = CMSG_NXTHDR(&msg, hdr)) {
-            if (hdr->cmsg_level == SOL_SOCKET && hdr->cmsg_type == SCM_RIGHTS) {
-                int nfd = (hdr->cmsg_len - CMSG_LEN(0)) / sizeof (int);
-                memcpy(&c->in.in_fd.fd[c->in.in_fd.nfd], CMSG_DATA(hdr), nfd * sizeof (int));
-                c->in.in_fd.nfd += nfd;
+        if (msg.msg_controllen >= sizeof (struct cmsghdr)) {
+            for (hdr = CMSG_FIRSTHDR(&msg); hdr; hdr = CMSG_NXTHDR(&msg, hdr)) {
+                if (hdr->cmsg_level == SOL_SOCKET && hdr->cmsg_type == SCM_RIGHTS) {
+                    int nfd = (hdr->cmsg_len - CMSG_LEN(0)) / sizeof (int);
+                    memcpy(&c->in.in_fd.fd[c->in.in_fd.nfd], CMSG_DATA(hdr), nfd * sizeof (int));
+                    c->in.in_fd.nfd += nfd;
+                }
             }
         }
 #endif