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xwayland: Stop using UNIX signals for readiness

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The latest Xorg / Xwayland has support for -displayfd being used
in conjunction with an explicit display number. Use that to know
when the X server is ready, rather than UNIX signals, because
they're UNIX signals.
This commit is contained in:
Jasper St. Pierre 2014-04-17 16:05:08 -04:00
parent 745134e066
commit 6a44f04b51
1 changed files with 21 additions and 8 deletions
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29
src/wayland/meta-xwayland.c
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@ -31,7 +31,6 @@
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/wait.h>
@ -383,10 +382,16 @@ xserver_finished_init (MetaXWaylandManager *manager)
}
static gboolean
got_sigusr1 (gpointer user_data)
on_displayfd_ready (int fd,
GIOCondition condition,
gpointer user_data)
{
MetaXWaylandManager *manager = user_data;
/* The server writes its display name to the displayfd
* socket when it's ready. We don't care about the data
* in the socket, just that it wrote something, since
* that means it's ready. */
xserver_finished_init (manager);
return G_SOURCE_REMOVE;
@ -397,6 +402,7 @@ meta_xwayland_start (MetaXWaylandManager *manager,
struct wl_display *wl_display)
{
int xwayland_client_fd[2];
int displayfd[2];
int fd;
if (!choose_xdisplay (manager))
@ -411,10 +417,17 @@ meta_xwayland_start (MetaXWaylandManager *manager,
return 1;
}
if (socketpair (AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, displayfd) < 0)
{
g_warning ("displayfd socketpair failed\n");
unlink (manager->lockfile);
return 1;
}
manager->pid = fork ();
if (manager->pid == 0)
{
char socket_fd[8], unix_fd[8], abstract_fd[8];
char socket_fd[8], unix_fd[8], abstract_fd[8], displayfd_fd[8];
/* We passed SOCK_CLOEXEC, so dup the FD so it isn't
* closed on exec.. */
@ -428,6 +441,9 @@ meta_xwayland_start (MetaXWaylandManager *manager,
fd = dup (manager->unix_fd);
snprintf (unix_fd, sizeof (unix_fd), "%d", fd);
fd = dup (displayfd[1]);
snprintf (displayfd_fd, sizeof (displayfd_fd), "%d", fd);
/* xwayland, please. */
if (getenv ("XWAYLAND_STFU"))
{
@ -438,16 +454,13 @@ meta_xwayland_start (MetaXWaylandManager *manager,
dup2 (dev_null, STDERR_FILENO);
}
/* We have to ignore SIGUSR1 in the child to make sure
* that the server will send it to mutter-wayland. */
signal(SIGUSR1, SIG_IGN);
if (execl (XWAYLAND_PATH, XWAYLAND_PATH,
manager->display_name,
"-rootless",
"-noreset",
"-listen", abstract_fd,
"-listen", unix_fd,
"-displayfd", displayfd_fd,
NULL) < 0)
{
g_error ("Failed to spawn XWayland: %m");
@ -459,7 +472,7 @@ meta_xwayland_start (MetaXWaylandManager *manager,
}
g_child_watch_add (manager->pid, xserver_died, NULL);
g_unix_signal_add (SIGUSR1, got_sigusr1, manager);
g_unix_fd_add (displayfd[0], G_IO_IN, on_displayfd_ready, manager);
manager->client = wl_client_create (wl_display, xwayland_client_fd[0]);
/* We need to run a mainloop until we know xwayland has a binding