- (stevesk) [monitor_fdpass.c] support for access rights style file

   descriptor passing

1 files changed, 26 insertions, 4 deletions

diff --git a/monitor_fdpass.c b/monitor_fdpass.c
index 7785535bb..fd55a2776 100644
--- a/monitor_fdpass.c
+++ b/monitor_fdpass.c
@@ -35,12 +35,18 @@ void
 mm_send_fd(int socket, int fd)
 {
         struct msghdr msg;
-        char tmp[CMSG_SPACE(sizeof(int))];
-        struct cmsghdr *cmsg;
         struct iovec vec;
         char ch;
+#ifndef HAVE_ACCRIGHTS_IN_MSGHDR
+        char tmp[CMSG_SPACE(sizeof(int))];
+        struct cmsghdr *cmsg;
+#endif
 
         memset(&msg, 0, sizeof(msg));
+#ifdef HAVE_ACCRIGHTS_IN_MSGHDR
+        msg.msg_accrights = (caddr_t)&fd;
+        msg.msg_accrightslen = sizeof(fd);
+#else
         msg.msg_control = (caddr_t)tmp;
         msg.msg_controllen = CMSG_LEN(sizeof(int));
         cmsg = CMSG_FIRSTHDR(&msg);
@@ -48,6 +54,7 @@ mm_send_fd(int socket, int fd)
         cmsg->cmsg_level = SOL_SOCKET;
         cmsg->cmsg_type = SCM_RIGHTS;
         *(int *)CMSG_DATA(cmsg) = fd;
+#endif
 
         vec.iov_base = &ch;
         vec.iov_len = 1;
@@ -62,25 +69,40 @@ int
 mm_receive_fd(int socket)
 {
         struct msghdr msg;
-        char tmp[CMSG_SPACE(sizeof(int))];
-        struct cmsghdr *cmsg;
         struct iovec vec;
         char ch;
+#ifndef HAVE_ACCRIGHTS_IN_MSGHDR
+        char tmp[CMSG_SPACE(sizeof(int))];
+        struct cmsghdr *cmsg;
+#else
+        int fd;
+#endif
 
         memset(&msg, 0, sizeof(msg));
         vec.iov_base = &ch;
         vec.iov_len = 1;
         msg.msg_iov = &vec;
         msg.msg_iovlen = 1;
+#ifdef HAVE_ACCRIGHTS_IN_MSGHDR
+        msg.msg_accrights = (caddr_t)&fd;
+        msg.msg_accrightslen = sizeof(fd);
+#else
         msg.msg_control = tmp;
         msg.msg_controllen = sizeof(tmp);
+#endif
 
         if (recvmsg(socket, &msg, 0) == -1)
                 fatal("%s: recvmsg", __FUNCTION__);
 
+#ifdef HAVE_ACCRIGHTS_IN_MSGHDR
+        if (msg.msg_accrightslen != sizeof(fd))
+                fatal("%s: no fd", __FUNCTION__);
+        return fd;
+#else
         cmsg = CMSG_FIRSTHDR(&msg);
         if (cmsg->cmsg_type != SCM_RIGHTS)
                 fatal("%s: expected type %d got %d", __FUNCTION__,
                     SCM_RIGHTS, cmsg->cmsg_type);
         return (*(int *)CMSG_DATA(cmsg));
+#endif
 }