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desktop-shell: launch from the compositor

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Fork and exec desktop-shell in the compositor. This is a way to create
an authenticated client. Later, the desktop-shell interface will be
reserved for this client only.

For exec to work, the compositor should be started from the
wayland-demos' root directory.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
This commit is contained in:
Pekka Paalanen 2011-11-03 14:11:32 +02:00 committed by Kristian Høgsberg
parent ef7c8d9ddf
commit 6cd281a023
2 changed files with 69 additions and 0 deletions
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3
clients/desktop-shell.c
View file

@ -323,6 +323,9 @@ int main(int argc, char *argv[])
return -1;
}
/* The fd is our private, do not confuse our children with it. */
unsetenv("WAYLAND_SOCKET");
wl_display_add_global_listener(display_get_display(desktop.display),
global_handler, &desktop);

66
compositor/shell.c
View file

@ -25,6 +25,9 @@
#include <string.h>
#include <unistd.h>
#include <linux/input.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <fcntl.h>
#include "wayland-server.h"
#include "compositor.h"
@ -37,6 +40,11 @@ struct wl_shell {
struct wl_listener panel_listener;
struct wlsc_surface *background;
struct wl_listener background_listener;
struct {
struct wlsc_process process;
struct wl_client *client;
} child;
};
struct wlsc_move_grab {
@ -925,6 +933,61 @@ attach(struct wlsc_shell *base, struct wlsc_surface *es)
}
}
static void
desktop_shell_sigchld(struct wlsc_process *process, int status)
{
struct wl_shell *shell =
container_of(process, struct wl_shell, child.process);
shell->child.process.pid = 0;
shell->child.client = NULL; /* already destroyed by wayland */
}
static int
launch_desktop_shell_process(struct wl_shell *shell)
{
const char *shell_exe = "./clients/desktop-shell";
struct wlsc_compositor *compositor = shell->compositor;
char s[32];
int sv[2], flags;
if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, sv) < 0) {
fprintf(stderr, "socketpair failed\n");
return -1;
}
shell->child.process.pid = fork();
shell->child.process.cleanup = desktop_shell_sigchld;
switch (shell->child.process.pid) {
case 0:
/* SOCK_CLOEXEC closes both ends, so we need to unset
* the flag on the client fd. */
flags = fcntl(sv[1], F_GETFD);
if (flags != -1)
fcntl(sv[1], F_SETFD, flags & ~FD_CLOEXEC);
snprintf(s, sizeof s, "%d", sv[1]);
setenv("WAYLAND_SOCKET", s, 1);
if (execl(shell_exe, shell_exe, NULL) < 0)
fprintf(stderr, "%s: running '%s' failed: %m\n",
__func__, shell_exe);
exit(-1);
default:
close(sv[1]);
shell->child.client =
wl_client_create(compositor->wl_display, sv[0]);
wlsc_watch_process(&shell->child.process);
break;
case -1:
fprintf(stderr, "%s: fork failed: %m\n", __func__);
return -1;
}
return 0;
}
static void
bind_shell(struct wl_client *client, void *data, uint32_t version, uint32_t id)
{
@ -972,6 +1035,9 @@ shell_init(struct wlsc_compositor *ec)
shell, bind_desktop_shell) == NULL)
return -1;
if (launch_desktop_shell_process(shell) != 0)
return -1;
wlsc_compositor_add_binding(ec, 0, BTN_LEFT, MODIFIER_SUPER,
move_binding, shell);
wlsc_compositor_add_binding(ec, 0, BTN_MIDDLE, MODIFIER_SUPER,