Added --enable-fbmanager. This is some experimental code that lets several

2001-06-25  Alexander Larsson  <alexl@redhat.com>

	* configure.in:
	Added --enable-fbmanager. This is some experimental code
	that lets several GtkFB apps coordinate their access to the
	framebuffer.

	* acconfig.h:
	Added ENABLE_FB_MANAGER.

	* gdk/linux-fb/Makefile.am:
	Added gdkfbmanager and gdkfbswitch.

	* gdk/linux-fb/gdkkeyboard-fb.c:
	* gdk/linux-fb/gdkmouse-fb.c:
	* gdk/linux-fb/gdkprivate-fb.h:
	Split device init and open so that
	they can be opened and closed while switched
	away.

	* gdk/linux-fb/gdkmain-fb.c:
	Add the basic manager communication.

	* gdk/linux-fb/gdkrender-fb.c:
	Don't update to the shadow fb if we're
	blocked by the fb manager.

1 files changed, 75 insertions, 0 deletions

diff --git a/gdk/linux-fb/gdkfbswitch.c b/gdk/linux-fb/gdkfbswitch.c
new file mode 100644
index 0000000000..707325f8f2
--- /dev/null
+++ b/gdk/linux-fb/gdkfbswitch.c
@@ -0,0 +1,75 @@
+#include <glib.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+#include "gdkfbmanager.h"
+
+int
+main (int argc, char *argv[])
+{
+  int fd;
+  struct sockaddr_un addr;
+  struct msghdr msg = {0};
+  struct cmsghdr *cmsg;
+  struct ucred credentials;
+  struct FBManagerMessage init_msg;
+  struct iovec iov;
+  char buf[CMSG_SPACE (sizeof (credentials))];  /* ancillary data buffer */
+  int *fdptr;
+  int res;
+
+  if (argc != 2)
+    {
+      g_print ("usage: fbswitch <pid>\n");
+      return 1;
+    }
+
+  fd = socket (PF_UNIX, SOCK_STREAM, 0);
+  
+  if (fd < 0)
+    return 1;
+
+  addr.sun_family = AF_UNIX;
+  strcpy (addr.sun_path, "/tmp/.fb.manager");
+
+  if (connect(fd, (struct sockaddr *)&addr, sizeof (addr)) < 0) 
+    {
+      g_print ("connect failed\n");
+      close (fd);
+      return 1;
+    }
+  
+  credentials.pid = getpid ();
+  credentials.uid = geteuid ();
+  credentials.gid = getegid ();
+
+  init_msg.msg_type = FB_MANAGER_NEW_CLIENT;
+  iov.iov_base = &init_msg;
+  iov.iov_len = sizeof (init_msg);
+
+  msg.msg_name = NULL;
+  msg.msg_namelen = 0;
+  msg.msg_iov = &iov;
+  msg.msg_iovlen = 1;
+  msg.msg_control = buf;
+  msg.msg_controllen = sizeof buf;
+  cmsg = CMSG_FIRSTHDR(&msg);
+  cmsg->cmsg_level = SOL_SOCKET;
+  cmsg->cmsg_type = SCM_CREDENTIALS;
+  cmsg->cmsg_len = CMSG_LEN (sizeof (credentials));
+  /* Initialize the payload: */
+  fdptr = (int *)CMSG_DATA (cmsg);
+  memcpy (fdptr, &credentials, sizeof (credentials));
+  /* Sum of the length of all control messages in the buffer: */
+  msg.msg_controllen = cmsg->cmsg_len;
+
+  res = sendmsg (fd, &msg, 0);
+
+  init_msg.msg_type = FB_MANAGER_REQUEST_SWITCH_TO_PID;
+  init_msg.data = atoi (argv[1]);
+  /* Request a switch-to */
+  send (fd, &init_msg, sizeof (init_msg), 0);
+  g_print ("requested a switch to pid %d\n", init_msg.data);
+}