[mutter/wip/wayland-display: 15/65] wayland: add TTY and DRM master management through weston-launch
- From: Giovanni Campagna <gcampagna src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [mutter/wip/wayland-display: 15/65] wayland: add TTY and DRM master management through weston-launch
- Date: Wed, 14 Aug 2013 16:44:47 +0000 (UTC)
commit a83049c103006e1921860c4b297e92e33bd91dd6
Author: Giovanni Campagna <gcampagn redhat com>
Date: Mon Jul 15 18:07:01 2013 +0200
wayland: add TTY and DRM master management through weston-launch
To run mutter as a display server, one needs to acquire and
release the DRM master, which is only possible for root, so
we take advantage of weston-launch, a small setuid helper binary
written for the weston project. We import our own slightly
modified copy of it, because weston-launch only launches weston,
for security reasons.
https://bugzilla.gnome.org/show_bug.cgi?id=705861
configure.ac | 3 +-
src/Makefile.am | 19 +-
src/wayland/meta-tty.c | 399 ++++++++++++++++++++
src/wayland/meta-tty.h | 43 +++
src/wayland/meta-wayland-private.h | 5 +
src/wayland/meta-wayland.c | 84 +++++-
src/wayland/meta-weston-launch.c | 202 +++++++++++
src/wayland/meta-weston-launch.h | 56 +++
src/wayland/weston-launch.c | 703 ++++++++++++++++++++++++++++++++++++
src/wayland/weston-launch.h | 46 +++
10 files changed, 1557 insertions(+), 3 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index fd3c455..3f997b1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -138,6 +138,7 @@ AM_GLIB_GNU_GETTEXT
## here we get the flags we'll actually use
# GRegex requires Glib-2.14.0
PKG_CHECK_MODULES(ALL, glib-2.0 >= 2.14.0)
+PKG_CHECK_MODULES(MUTTER_LAUNCH, libdrm libsystemd-login)
# Unconditionally use this dir to avoid a circular dep with gnomecc
GNOME_KEYBINDINGS_KEYSDIR="${datadir}/gnome-control-center/keybindings"
@@ -232,7 +233,7 @@ if test x$enable_wayland = "xyes"; then
AC_SUBST(XWAYLAND_PATH)
- MUTTER_PC_MODULES="$MUTTER_PC_MODULES wayland-server"
+ MUTTER_PC_MODULES="$MUTTER_PC_MODULES wayland-server libdrm"
AC_DEFINE(HAVE_WAYLAND, , [Building with Wayland support])
have_wayland=yes
fi
diff --git a/src/Makefile.am b/src/Makefile.am
index 1c0ac25..941651d 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -173,6 +173,8 @@ libmutter_la_SOURCES = \
if HAVE_WAYLAND
libmutter_la_SOURCES += \
+ wayland/meta-tty.c \
+ wayland/meta-tty.h \
wayland/meta-wayland.c \
wayland/meta-wayland-private.h \
wayland/meta-xwayland-private.h \
@@ -186,7 +188,9 @@ libmutter_la_SOURCES += \
wayland/meta-wayland-seat.c \
wayland/meta-wayland-seat.h \
wayland/meta-wayland-stage.h \
- wayland/meta-wayland-stage.c
+ wayland/meta-wayland-stage.c \
+ wayland/meta-weston-launch.c \
+ wayland/meta-weston-launch.h
endif
libmutter_la_LDFLAGS = -no-undefined
@@ -237,6 +241,19 @@ bin_PROGRAMS=mutter
mutter_SOURCES = core/mutter.c
mutter_LDADD = $(MUTTER_LIBS) libmutter.la
+if HAVE_WAYLAND
+bin_PROGRAMS+=mutter-launch
+
+mutter_launch_SOURCES = wayland/weston-launch.c wayland/weston-launch.h
+
+mutter_launch_CFLAGS = $(MUTTER_LAUNCH_CFLAGS)
+mutter_launch_LDFLAGS = $(MUTTER_LAUNCH_LIBS) -lpam
+
+install-exec-hook:
+ -chown root $(DESTDIR)$(bindir)/mutter-launch
+ -chmod u+s $(DESTDIR)$(bindir)/mutter-launch
+endif
+
if HAVE_INTROSPECTION
include $(INTROSPECTION_MAKEFILE)
diff --git a/src/wayland/meta-tty.c b/src/wayland/meta-tty.c
new file mode 100644
index 0000000..8aae4c7
--- /dev/null
+++ b/src/wayland/meta-tty.c
@@ -0,0 +1,399 @@
+/*
+ * Copyright © 2010 Intel Corporation
+ * 2013 Red Hat, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of the copyright holders not be used in
+ * advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission. The copyright holders make
+ * no representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+ * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "config.h"
+
+#include <termios.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <signal.h>
+#include <linux/kd.h>
+#include <linux/vt.h>
+#include <linux/major.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "meta-tty.h"
+#include <gio/gio.h>
+#include <glib-unix.h>
+
+/* Introduced in 2.6.38 */
+#ifndef K_OFF
+#define K_OFF 0x04
+#endif
+
+struct _MetaTTYClass
+{
+ GObjectClass parent_class;
+};
+
+struct _MetaTTY
+{
+ GObject parent;
+
+ int fd;
+ struct termios terminal_attributes;
+
+ int input_source, vt_source;
+ int vt, starting_vt;
+ gboolean has_vt;
+ int kb_mode;
+};
+
+enum {
+ SIGNAL_ENTER,
+ SIGNAL_LEAVE,
+ SIGNAL_LAST
+};
+
+static int signals[SIGNAL_LAST];
+
+static void meta_tty_initable_iface_init (GInitableIface *);
+
+G_DEFINE_TYPE_WITH_CODE (MetaTTY, meta_tty, G_TYPE_OBJECT,
+ G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
+ meta_tty_initable_iface_init));
+
+static int
+vt_handler (gpointer user_data)
+{
+ MetaTTY *tty = user_data;
+
+ if (tty->has_vt)
+ {
+ tty->has_vt = FALSE;
+ g_signal_emit (tty, signals[SIGNAL_LEAVE], 0);
+
+ ioctl (tty->fd, VT_RELDISP, 1);
+ }
+ else
+ {
+ ioctl (tty->fd, VT_RELDISP, VT_ACKACQ);
+
+ tty->has_vt = 1;
+ g_signal_emit (tty, signals[SIGNAL_ENTER], 0);
+ }
+
+ return 1;
+}
+
+static int
+on_tty_input (int fd,
+ GIOCondition mask,
+ gpointer user_data)
+{
+ MetaTTY *tty = user_data;
+
+ /* Ignore input to tty. We get keyboard events from evdev */
+ tcflush(tty->fd, TCIFLUSH);
+
+ return 1;
+}
+
+static int
+try_open_vt (MetaTTY *tty,
+ GError **error)
+{
+ int tty0, fd;
+ char filename[16];
+
+ tty0 = open ("/dev/tty0", O_WRONLY | O_CLOEXEC);
+ if (tty0 < 0)
+ {
+ g_set_error (error, G_IO_ERROR,
+ g_io_error_from_errno (errno),
+ "Could not open tty0: %s", strerror (errno));
+ return -1;
+ }
+
+ if (ioctl (tty0, VT_OPENQRY, &tty->vt) < 0 || tty->vt == -1) {
+ g_set_error (error, G_IO_ERROR,
+ g_io_error_from_errno (errno),
+ "Could not open tty0: %s", strerror (errno));
+ close (tty0);
+ return -1;
+ }
+
+ close (tty0);
+ snprintf (filename, sizeof filename, "/dev/tty%d", tty->vt);
+ g_debug("compositor: using new vt %s\n", filename);
+ fd = open (filename, O_RDWR | O_NOCTTY | O_CLOEXEC);
+ return fd;
+}
+
+/* FIXME? */
+static int
+tty_activate_vt (MetaTTY *tty,
+ int vt)
+{
+ return ioctl(tty->fd, VT_ACTIVATE, vt);
+}
+
+static int
+env_get_fd (const char *env)
+{
+ const char *value;
+
+ value = g_getenv (env);
+
+ if (value == NULL)
+ return -1;
+ else
+ return g_ascii_strtoll (env, NULL, 10);
+}
+
+static gboolean
+meta_tty_initable_init(GInitable *initable,
+ GCancellable *cancellable,
+ GError **error)
+{
+ MetaTTY *tty = META_TTY (initable);
+ struct termios raw_attributes;
+ struct vt_mode mode = { 0 };
+ int ret;
+
+ struct stat buf;
+ struct vt_stat vts;
+
+ tty->fd = env_get_fd ("WESTON_TTY_FD");
+ if (tty->fd < 0)
+ tty->fd = STDIN_FILENO;
+
+ if (fstat(tty->fd, &buf) == 0 &&
+ major(buf.st_rdev) == TTY_MAJOR &&
+ minor(buf.st_rdev) > 0)
+ {
+ if (tty->fd == STDIN_FILENO)
+ tty->fd = fcntl(STDIN_FILENO, F_DUPFD_CLOEXEC, 0);
+ tty->vt = minor(buf.st_rdev);
+ }
+ else
+ {
+ /* Fall back to try opening a new VT. This typically
+ * requires root. */
+ tty->fd = try_open_vt(tty, error);
+ }
+
+ if (tty->fd <= 0 && (!error || !*error))
+ {
+ g_set_error (error, G_IO_ERROR,
+ g_io_error_from_errno (errno),
+ "Could not open tty0: %s", strerror (errno));
+ return FALSE;
+ }
+
+ if (ioctl(tty->fd, VT_GETSTATE, &vts) == 0)
+ tty->starting_vt = vts.v_active;
+ else
+ tty->starting_vt = tty->vt;
+
+ if (tty->starting_vt != tty->vt)
+ {
+ if (ioctl(tty->fd, VT_ACTIVATE, tty->vt) < 0 ||
+ ioctl(tty->fd, VT_WAITACTIVE, tty->vt) < 0)
+ {
+ g_set_error (error, G_IO_ERROR,
+ g_io_error_from_errno (errno),
+ "Failed to switch to new vt: %s", strerror (errno));
+ goto err;
+ }
+ }
+
+ if (tcgetattr(tty->fd, &tty->terminal_attributes) < 0)
+ {
+ g_set_error (error, G_IO_ERROR,
+ g_io_error_from_errno (errno),
+ "Could not get terminal attributes: %s", strerror (errno));
+ goto err;
+ }
+
+ /* Ignore control characters and disable echo */
+ raw_attributes = tty->terminal_attributes;
+ cfmakeraw(&raw_attributes);
+
+ /* Fix up line endings to be normal (cfmakeraw hoses them) */
+ raw_attributes.c_oflag |= OPOST | OCRNL;
+ /* Don't generate ttou signals */
+ raw_attributes.c_oflag &= ~TOSTOP;
+
+ if (tcsetattr(tty->fd, TCSANOW, &raw_attributes) < 0)
+ g_warning("Could not put terminal into raw mode: %s", strerror (errno));
+
+ ioctl(tty->fd, KDGKBMODE, &tty->kb_mode);
+ ret = ioctl(tty->fd, KDSKBMODE, K_OFF);
+ if (ret)
+ {
+ ret = ioctl(tty->fd, KDSKBMODE, K_RAW);
+ if (ret)
+ {
+ g_set_error (error, G_IO_ERROR,
+ g_io_error_from_errno (errno),
+ "Failed to set keyboard mode: %s", strerror (errno));
+ goto err_attr;
+ }
+
+ tty->input_source = g_unix_fd_add (tty->fd,
+ G_IO_IN,
+ on_tty_input, tty);
+ }
+
+ ret = ioctl(tty->fd, KDSETMODE, KD_GRAPHICS);
+ if (ret)
+ {
+ g_set_error (error, G_IO_ERROR,
+ g_io_error_from_errno (errno),
+ "Failed to set KD_GRAPHICS mode: %s", strerror (errno));
+ goto err_kdkbmode;
+ }
+
+ tty->has_vt = 1;
+ mode.mode = VT_PROCESS;
+ mode.relsig = SIGUSR1;
+ mode.acqsig = SIGUSR1;
+ if (ioctl(tty->fd, VT_SETMODE, &mode) < 0)
+ {
+ g_set_error (error, G_IO_ERROR,
+ g_io_error_from_errno (errno),
+ "Failed to take control of vt handling: %s", strerror (errno));
+ goto err_kdmode;
+ }
+
+ tty->vt_source = g_unix_signal_add (SIGUSR1, vt_handler, tty);
+
+ return TRUE;
+
+ err_kdmode:
+ ioctl (tty->fd, KDSETMODE, KD_TEXT);
+
+ err_kdkbmode:
+ if (tty->input_source)
+ g_source_remove (tty->input_source);
+ ioctl (tty->fd, KDSKBMODE, tty->kb_mode);
+
+ err_attr:
+ tcsetattr (tty->fd, TCSANOW, &tty->terminal_attributes);
+
+ err:
+ close (tty->fd);
+ return FALSE;
+}
+
+static void
+tty_reset (MetaTTY *tty)
+{
+ struct vt_mode mode = { 0 };
+
+ if (ioctl (tty->fd, KDSKBMODE, tty->kb_mode))
+ g_warning ("failed to restore keyboard mode: %s", strerror (errno));
+
+ if (ioctl (tty->fd, KDSETMODE, KD_TEXT))
+ g_warning ("failed to set KD_TEXT mode on tty: %s", strerror (errno));
+
+ if (tcsetattr (tty->fd, TCSANOW, &tty->terminal_attributes) < 0)
+ g_warning ("could not restore terminal to canonical mode");
+
+ mode.mode = VT_AUTO;
+ if (ioctl (tty->fd, VT_SETMODE, &mode) < 0)
+ g_warning ("could not reset vt handling\n");
+
+ if (tty->has_vt && tty->vt != tty->starting_vt)
+ {
+ ioctl(tty->fd, VT_ACTIVATE, tty->starting_vt);
+ ioctl(tty->fd, VT_WAITACTIVE, tty->starting_vt);
+ }
+}
+
+static void
+meta_tty_finalize (GObject *object)
+{
+ MetaTTY *tty = META_TTY (object);
+
+ if (tty->input_source)
+ g_source_remove (tty->input_source);
+
+ g_source_remove (tty->vt_source);
+
+ tty_reset (tty);
+
+ close (tty->fd);
+
+ G_OBJECT_CLASS (meta_tty_parent_class)->finalize (object);
+}
+
+static void
+meta_tty_init (MetaTTY *self)
+{
+}
+
+static void
+meta_tty_class_init (MetaTTYClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+ object_class->finalize = meta_tty_finalize;
+
+ signals[SIGNAL_ENTER] = g_signal_new ("enter",
+ G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_FIRST,
+ 0, /* class offset */
+ NULL, NULL, /* accumulator */
+ g_cclosure_marshal_VOID__VOID,
+ G_TYPE_NONE, 0);
+
+ signals[SIGNAL_LEAVE] = g_signal_new ("leave",
+ G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_FIRST,
+ 0, /* class offset */
+ NULL, NULL, /* accumulator */
+ g_cclosure_marshal_VOID__VOID,
+ G_TYPE_NONE, 0);
+}
+
+static void
+meta_tty_initable_iface_init (GInitableIface *iface)
+{
+ iface->init = meta_tty_initable_init;
+}
+
+MetaTTY *
+meta_tty_new (void)
+{
+ GError *error;
+ MetaTTY *tty;
+
+ error = NULL;
+ tty = g_initable_new (META_TYPE_TTY, NULL, &error, NULL);
+
+ if (tty == NULL)
+ {
+ g_warning ("Failed to initalize TTY handling: %s", error->message);
+ g_error_free (error);
+ }
+
+ return tty;
+}
diff --git a/src/wayland/meta-tty.h b/src/wayland/meta-tty.h
new file mode 100644
index 0000000..2c3bf2a
--- /dev/null
+++ b/src/wayland/meta-tty.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2013 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef META_TTY_H
+#define META_TTY_H
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define META_TYPE_TTY (meta_tty_get_type())
+#define META_TTY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), META_TYPE_TTY, MetaTTY))
+#define META_TTY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), META_TYPE_TTY, MetaTTYClass))
+#define META_IS_TTY(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), META_TYPE_TTY))
+#define META_IS_TTY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), META_TYPE_TTY))
+#define META_TTY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), META_TTY, MetaTTYClass))
+
+typedef struct _MetaTTY MetaTTY;
+typedef struct _MetaTTYClass MetaTTYClass;
+
+GType meta_tty_get_type (void) G_GNUC_CONST;
+
+MetaTTY *meta_tty_new (void);
+
+G_END_DECLS
+
+#endif /* META_TTY_H */
diff --git a/src/wayland/meta-wayland-private.h b/src/wayland/meta-wayland-private.h
index a859378..7d111ec 100644
--- a/src/wayland/meta-wayland-private.h
+++ b/src/wayland/meta-wayland-private.h
@@ -28,6 +28,7 @@
#include <cairo.h>
#include "window-private.h"
+#include "meta-tty.h"
typedef struct _MetaWaylandCompositor MetaWaylandCompositor;
@@ -165,6 +166,10 @@ struct _MetaWaylandCompositor
struct wl_client *xwayland_client;
struct wl_resource *xserver_resource;
+ MetaTTY *tty;
+ int drm_fd;
+ GSocket *weston_launch;
+
MetaWaylandSeat *seat;
/* This surface is only used to keep drag of the implicit grab when
diff --git a/src/wayland/meta-wayland.c b/src/wayland/meta-wayland.c
index 5b62e89..035fc22 100644
--- a/src/wayland/meta-wayland.c
+++ b/src/wayland/meta-wayland.c
@@ -48,6 +48,7 @@
#include <meta/types.h>
#include <meta/main.h>
#include "frame.h"
+#include "meta-weston-launch.h"
static MetaWaylandCompositor _meta_wayland_compositor;
@@ -1379,11 +1380,59 @@ event_emission_hook_cb (GSignalInvocationHint *ihint,
return TRUE /* stay connected */;
}
+static int
+env_get_fd (const char *env)
+{
+ const char *value;
+
+ value = g_getenv (env);
+
+ if (value == NULL)
+ return -1;
+ else
+ return g_ascii_strtoll (env, NULL, 10);
+}
+
+static void
+on_our_vt_enter (MetaTTY *tty,
+ MetaWaylandCompositor *compositor)
+{
+ GError *error;
+
+ error = NULL;
+ if (!meta_weston_launch_set_master (compositor->weston_launch,
+ compositor->drm_fd, TRUE, &error))
+ {
+ g_warning ("Failed to become DRM master: %s", error->message);
+ g_error_free (error);
+ }
+}
+
+static void
+on_our_vt_leave (MetaTTY *tty,
+ MetaWaylandCompositor *compositor)
+{
+ GError *error;
+
+ error = NULL;
+ if (!meta_weston_launch_set_master (compositor->weston_launch,
+ compositor->drm_fd, FALSE, &error))
+ {
+ g_warning ("Failed to release DRM master: %s", error->message);
+ g_error_free (error);
+ }
+
+ /* FIXME: we must release input devices as well! */
+}
+
void
meta_wayland_init (void)
{
MetaWaylandCompositor *compositor = &_meta_wayland_compositor;
guint event_signal;
+ ClutterBackend *backend;
+ CoglContext *cogl_context;
+ CoglRenderer *cogl_renderer;
memset (compositor, 0, sizeof (MetaWaylandCompositor));
@@ -1423,6 +1472,34 @@ meta_wayland_init (void)
if (clutter_init (NULL, NULL) != CLUTTER_INIT_SUCCESS)
g_error ("Failed to initialize Clutter");
+ backend = clutter_get_default_backend ();
+ cogl_context = clutter_backend_get_cogl_context (backend);
+ cogl_renderer = cogl_display_get_renderer (cogl_context_get_display (cogl_context));
+
+ if (cogl_renderer_get_winsys_id (cogl_renderer) == COGL_WINSYS_ID_EGL_KMS)
+ compositor->drm_fd = cogl_kms_renderer_get_kms_fd (cogl_renderer);
+ else
+ compositor->drm_fd = -1;
+
+ if (compositor->drm_fd >= 0)
+ {
+ /* Running on bare metal, let's initalize DRM master and VT handling */
+ int weston_launch_fd;
+
+ weston_launch_fd = env_get_fd ("WESTON_LAUNCHER_SOCK");
+ if (weston_launch_fd >= 0)
+ compositor->weston_launch = g_socket_new_from_fd (weston_launch_fd, NULL);
+
+ compositor->tty = meta_tty_new ();
+ if (compositor->tty)
+ {
+ g_signal_connect (compositor->tty, "enter", G_CALLBACK (on_our_vt_enter), compositor);
+ g_signal_connect (compositor->tty, "leave", G_CALLBACK (on_our_vt_leave), compositor);
+ }
+
+ on_our_vt_enter (compositor->tty, compositor);
+ }
+
compositor->stage = meta_wayland_stage_new ();
clutter_stage_set_user_resizable (CLUTTER_STAGE (compositor->stage), FALSE);
g_signal_connect_after (compositor->stage, "paint",
@@ -1480,5 +1557,10 @@ meta_wayland_init (void)
void
meta_wayland_finalize (void)
{
- meta_xwayland_stop (meta_wayland_compositor_get_default ());
+ MetaWaylandCompositor *compositor;
+
+ compositor = meta_wayland_compositor_get_default ();
+
+ meta_xwayland_stop (compositor);
+ g_clear_object (&compositor->tty);
}
diff --git a/src/wayland/meta-weston-launch.c b/src/wayland/meta-weston-launch.c
new file mode 100644
index 0000000..68f14cf
--- /dev/null
+++ b/src/wayland/meta-weston-launch.c
@@ -0,0 +1,202 @@
+/*
+ * Copyright (C) 2013 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include <config.h>
+
+#include <gio/gio.h>
+#include <gio/gunixfdmessage.h>
+
+#include <glib.h>
+#include <sys/time.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+
+#include <drm.h>
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+
+#include "meta-weston-launch.h"
+
+static gboolean
+send_message_to_wl (GSocket *weston_launch,
+ void *message,
+ gsize size,
+ GSocketControlMessage *out_cmsg,
+ GSocketControlMessage **in_cmsg,
+ GError **error)
+{
+ int ok;
+ GInputVector in_iov = { &ok, sizeof (int) };
+ GOutputVector out_iov = { message, size };
+ GSocketControlMessage *out_all_cmsg[2];
+ GSocketControlMessage **in_all_cmsg;
+ int flags = 0;
+ int i;
+
+ out_all_cmsg[0] = out_cmsg;
+ out_all_cmsg[1] = NULL;
+ if (g_socket_send_message (weston_launch, NULL,
+ &out_iov, 1,
+ out_all_cmsg, -1,
+ flags, NULL, error) != (gssize)size)
+ return FALSE;
+
+ if (g_socket_receive_message (weston_launch, NULL,
+ &in_iov, 1,
+ &in_all_cmsg, NULL,
+ &flags, NULL, error) != sizeof (int))
+ return FALSE;
+
+ if (ok != 0)
+ {
+ if (ok == -1)
+ g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
+ "Got failure from weston-launch");
+ else
+ g_set_error (error, G_IO_ERROR, g_io_error_from_errno (-ok),
+ "Got failure from weston-launch: %s", strerror (-ok));
+
+ for (i = 0; in_all_cmsg[i]; i++)
+ g_object_unref (in_all_cmsg[i]);
+ g_free (in_all_cmsg);
+
+ return FALSE;
+ }
+
+ if (in_all_cmsg[0])
+ {
+ for (i = 1; in_all_cmsg[i]; i++)
+ g_object_unref (in_all_cmsg[i]);
+ *in_cmsg = in_all_cmsg[0];
+ }
+
+ g_free (in_all_cmsg);
+ return TRUE;
+}
+
+gboolean
+meta_weston_launch_set_master (GSocket *weston_launch,
+ int drm_fd,
+ gboolean master,
+ GError **error)
+{
+ if (weston_launch)
+ {
+ struct weston_launcher_set_master message;
+ GSocketControlMessage *cmsg;
+ gboolean ok;
+
+ message.header.opcode = WESTON_LAUNCHER_DRM_SET_MASTER;
+ message.set_master = master;
+
+ cmsg = g_unix_fd_message_new ();
+ if (g_unix_fd_message_append_fd (G_UNIX_FD_MESSAGE (cmsg),
+ drm_fd, error) == FALSE)
+ {
+ g_object_unref (cmsg);
+ return FALSE;
+ }
+
+ ok = send_message_to_wl (weston_launch, &message, sizeof message, cmsg, NULL, error);
+
+ g_object_unref (cmsg);
+ return ok;
+ }
+ else
+ {
+ int ret;
+
+ if (master)
+ ret = drmSetMaster (drm_fd);
+ else
+ ret = drmDropMaster (drm_fd);
+
+ if (ret < 0)
+ {
+ g_set_error (error, G_IO_ERROR, g_io_error_from_errno (-ret),
+ "Failed to set DRM master directly: %s", strerror (-ret));
+ return FALSE;
+ }
+ else
+ return TRUE;
+ }
+}
+
+int
+meta_weston_launch_open_input_device (GSocket *weston_launch,
+ const char *name,
+ int flags,
+ GError **error)
+{
+ if (weston_launch)
+ {
+ struct weston_launcher_open *message;
+ GSocketControlMessage *cmsg;
+ gboolean ok;
+ int *fds, n_fd;
+ int ret;
+
+ message = g_malloc (sizeof (struct weston_launcher_open) +
+ strlen (name));
+ message->header.opcode = WESTON_LAUNCHER_OPEN;
+ message->flags = flags;
+ strcpy (message->path, name);
+
+ ok = send_message_to_wl (weston_launch, message,
+ sizeof (struct weston_launcher_open) + strlen (name),
+ NULL, &cmsg, error);
+
+ if (ok)
+ {
+ g_assert (G_IS_UNIX_FD_MESSAGE (cmsg));
+
+ fds = g_unix_fd_message_steal_fds (G_UNIX_FD_MESSAGE (cmsg), &n_fd);
+ g_assert (n_fd == 1);
+
+ ret = fds[0];
+ g_free (fds);
+ }
+ else
+ ret = -1;
+
+ g_free (message);
+ g_object_unref (cmsg);
+ return ret;
+ }
+ else
+ {
+ int ret;
+
+ ret = open (name, flags, 0);
+
+ if (ret < 0)
+ g_set_error (error, G_IO_ERROR, g_io_error_from_errno (errno),
+ "Failed to open input device directly: %s", strerror (errno));
+
+ return ret;
+ }
+}
+
diff --git a/src/wayland/meta-weston-launch.h b/src/wayland/meta-weston-launch.h
new file mode 100644
index 0000000..f642ba9
--- /dev/null
+++ b/src/wayland/meta-weston-launch.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2013 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef META_WESTON_LAUNCH_H
+#define META_WESTON_LAUNCH_H
+
+#include <glib-object.h>
+
+/* Keep this in sync with weston-launch */
+
+enum weston_launcher_opcode {
+ WESTON_LAUNCHER_OPEN,
+ WESTON_LAUNCHER_DRM_SET_MASTER
+};
+
+struct weston_launcher_message {
+ int opcode;
+};
+
+struct weston_launcher_open {
+ struct weston_launcher_message header;
+ int flags;
+ char path[0];
+};
+
+struct weston_launcher_set_master {
+ struct weston_launcher_message header;
+ int set_master;
+};
+
+gboolean meta_weston_launch_set_master (GSocket *weston_launch,
+ int drm_fd,
+ gboolean master,
+ GError **error);
+int meta_weston_launch_open_input_device (GSocket *weston_launch,
+ const char *name,
+ int flags,
+ GError **error);
+
+#endif
diff --git a/src/wayland/weston-launch.c b/src/wayland/weston-launch.c
new file mode 100644
index 0000000..b38386e
--- /dev/null
+++ b/src/wayland/weston-launch.c
@@ -0,0 +1,703 @@
+/*
+ * Copyright © 2012 Benjamin Franzke
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of the copyright holders not be used in
+ * advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission. The copyright holders make
+ * no representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+ * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <poll.h>
+#include <errno.h>
+
+#include <error.h>
+#include <getopt.h>
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <sys/socket.h>
+#include <sys/signalfd.h>
+#include <signal.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <limits.h>
+
+#include <termios.h>
+#include <linux/vt.h>
+#include <linux/major.h>
+
+#include <pwd.h>
+#include <grp.h>
+#include <security/pam_appl.h>
+
+#include <xf86drm.h>
+
+#ifdef HAVE_SYSTEMD_LOGIN
+#include <systemd/sd-login.h>
+#endif
+
+#include "weston-launch.h"
+
+#define MAX_ARGV_SIZE 256
+
+struct weston_launch {
+ struct pam_conv pc;
+ pam_handle_t *ph;
+ int tty;
+ int ttynr;
+ int sock[2];
+ struct passwd *pw;
+
+ int signalfd;
+
+ pid_t child;
+ int verbose;
+ char *new_user;
+};
+
+union cmsg_data { unsigned char b[4]; int fd; };
+
+static gid_t *
+read_groups(void)
+{
+ int n;
+ gid_t *groups;
+
+ n = getgroups(0, NULL);
+
+ if (n < 0) {
+ fprintf(stderr, "Unable to retrieve groups: %m\n");
+ return NULL;
+ }
+
+ groups = malloc(n * sizeof(gid_t));
+ if (!groups)
+ return NULL;
+
+ if (getgroups(n, groups) < 0) {
+ fprintf(stderr, "Unable to retrieve groups: %m\n");
+ free(groups);
+ return NULL;
+ }
+ return groups;
+}
+
+static int
+weston_launch_allowed(struct weston_launch *wl)
+{
+ struct group *gr;
+ gid_t *groups;
+ int i;
+#ifdef HAVE_SYSTEMD_LOGIN
+ char *session, *seat;
+ int err;
+#endif
+
+ if (getuid() == 0)
+ return 1;
+
+ gr = getgrnam("weston-launch");
+ if (gr) {
+ groups = read_groups();
+ if (groups) {
+ for (i = 0; groups[i]; ++i) {
+ if (groups[i] == gr->gr_gid) {
+ free(groups);
+ return 1;
+ }
+ }
+ free(groups);
+ }
+ }
+
+#ifdef HAVE_SYSTEMD_LOGIN
+ err = sd_pid_get_session(getpid(), &session);
+ if (err == 0 && session) {
+ if (sd_session_is_active(session) &&
+ sd_session_get_seat(session, &seat) == 0) {
+ free(seat);
+ free(session);
+ return 1;
+ }
+ free(session);
+ }
+#endif
+
+ return 0;
+}
+
+static int
+pam_conversation_fn(int msg_count,
+ const struct pam_message **messages,
+ struct pam_response **responses,
+ void *user_data)
+{
+ return PAM_SUCCESS;
+}
+
+static int
+setup_pam(struct weston_launch *wl)
+{
+ int err;
+
+ wl->pc.conv = pam_conversation_fn;
+ wl->pc.appdata_ptr = wl;
+
+ err = pam_start("login", wl->pw->pw_name, &wl->pc, &wl->ph);
+ if (err != PAM_SUCCESS) {
+ fprintf(stderr, "failed to start pam transaction: %d: %s\n",
+ err, pam_strerror(wl->ph, err));
+ return -1;
+ }
+
+ err = pam_set_item(wl->ph, PAM_TTY, ttyname(wl->tty));
+ if (err != PAM_SUCCESS) {
+ fprintf(stderr, "failed to set PAM_TTY item: %d: %s\n",
+ err, pam_strerror(wl->ph, err));
+ return -1;
+ }
+
+ err = pam_open_session(wl->ph, 0);
+ if (err != PAM_SUCCESS) {
+ fprintf(stderr, "failed to open pam session: %d: %s\n",
+ err, pam_strerror(wl->ph, err));
+ return -1;
+ }
+
+ return 0;
+}
+
+static int
+setup_launcher_socket(struct weston_launch *wl)
+{
+ if (socketpair(AF_LOCAL, SOCK_DGRAM, 0, wl->sock) < 0)
+ error(1, errno, "socketpair failed");
+
+ fcntl(wl->sock[0], F_SETFD, O_CLOEXEC);
+
+ return 0;
+}
+
+static int
+setup_signals(struct weston_launch *wl)
+{
+ int ret;
+ sigset_t mask;
+ struct sigaction sa;
+
+ memset(&sa, 0, sizeof sa);
+ sa.sa_handler = SIG_DFL;
+ sa.sa_flags = SA_NOCLDSTOP | SA_RESTART;
+ ret = sigaction(SIGCHLD, &sa, NULL);
+ assert(ret == 0);
+
+ sa.sa_handler = SIG_IGN;
+ sa.sa_flags = 0;
+ sigaction(SIGHUP, &sa, NULL);
+
+ ret = sigemptyset(&mask);
+ assert(ret == 0);
+ sigaddset(&mask, SIGCHLD);
+ sigaddset(&mask, SIGINT);
+ sigaddset(&mask, SIGTERM);
+ ret = sigprocmask(SIG_BLOCK, &mask, NULL);
+ assert(ret == 0);
+
+ wl->signalfd = signalfd(-1, &mask, SFD_NONBLOCK | SFD_CLOEXEC);
+ if (wl->signalfd < 0)
+ return -errno;
+
+ return 0;
+}
+
+static void
+setenv_fd(const char *env, int fd)
+{
+ char buf[32];
+
+ snprintf(buf, sizeof buf, "%d", fd);
+ setenv(env, buf, 1);
+}
+
+static int
+handle_setmaster(struct weston_launch *wl, struct msghdr *msg, ssize_t len)
+{
+ int ret = -1;
+ struct cmsghdr *cmsg;
+ struct weston_launcher_set_master *message;
+ union cmsg_data *data;
+
+ if (len != sizeof(*message)) {
+ error(0, 0, "missing value in setmaster request");
+ goto out;
+ }
+
+ message = msg->msg_iov->iov_base;
+
+ cmsg = CMSG_FIRSTHDR(msg);
+ if (!cmsg ||
+ cmsg->cmsg_level != SOL_SOCKET ||
+ cmsg->cmsg_type != SCM_RIGHTS) {
+ error(0, 0, "invalid control message");
+ goto out;
+ }
+
+ data = (union cmsg_data *) CMSG_DATA(cmsg);
+ if (data->fd == -1) {
+ error(0, 0, "missing drm fd in socket request");
+ goto out;
+ }
+
+ if (message->set_master)
+ ret = drmSetMaster(data->fd);
+ else
+ ret = drmDropMaster(data->fd);
+
+ close(data->fd);
+
+ if (wl->verbose)
+ fprintf(stderr, "weston-launch: %sMaster, ret: %d, fd: %d\n",
+ message->set_master ? "set" : "drop", ret, data->fd);
+
+out:
+ do {
+ len = send(wl->sock[0], &ret, sizeof ret, 0);
+ } while (len < 0 && errno == EINTR);
+ if (len < 0)
+ return -1;
+
+ return 0;
+}
+
+static int
+handle_open(struct weston_launch *wl, struct msghdr *msg, ssize_t len)
+{
+ int fd = -1, ret = -1;
+ char control[CMSG_SPACE(sizeof(fd))];
+ struct cmsghdr *cmsg;
+ struct stat s;
+ struct msghdr nmsg;
+ struct iovec iov;
+ struct weston_launcher_open *message;
+ union cmsg_data *data;
+
+ message = msg->msg_iov->iov_base;
+ if ((size_t)len < sizeof(*message))
+ goto err0;
+
+ /* Ensure path is null-terminated */
+ ((char *) message)[len-1] = '\0';
+
+ if (stat(message->path, &s) < 0)
+ goto err0;
+
+ fd = open(message->path, message->flags);
+ if (fd < 0) {
+ fprintf(stderr, "Error opening device %s: %m\n",
+ message->path);
+ goto err0;
+ }
+
+ if (major(s.st_rdev) != INPUT_MAJOR) {
+ close(fd);
+ fd = -1;
+ fprintf(stderr, "Device %s is not an input device\n",
+ message->path);
+ goto err0;
+ }
+
+err0:
+ memset(&nmsg, 0, sizeof nmsg);
+ nmsg.msg_iov = &iov;
+ nmsg.msg_iovlen = 1;
+ if (fd != -1) {
+ nmsg.msg_control = control;
+ nmsg.msg_controllen = sizeof control;
+ cmsg = CMSG_FIRSTHDR(&nmsg);
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_type = SCM_RIGHTS;
+ cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
+ data = (union cmsg_data *) CMSG_DATA(cmsg);
+ data->fd = fd;
+ nmsg.msg_controllen = cmsg->cmsg_len;
+ ret = 0;
+ }
+ iov.iov_base = &ret;
+ iov.iov_len = sizeof ret;
+
+ if (wl->verbose)
+ fprintf(stderr, "weston-launch: opened %s: ret: %d, fd: %d\n",
+ message->path, ret, fd);
+ do {
+ len = sendmsg(wl->sock[0], &nmsg, 0);
+ } while (len < 0 && errno == EINTR);
+
+ close(fd);
+
+ if (len < 0)
+ return -1;
+
+ return 0;
+}
+
+static int
+handle_socket_msg(struct weston_launch *wl)
+{
+ char control[CMSG_SPACE(sizeof(int))];
+ char buf[BUFSIZ];
+ struct msghdr msg;
+ struct iovec iov;
+ int ret = -1;
+ ssize_t len;
+ struct weston_launcher_message *message;
+
+ memset(&msg, 0, sizeof(msg));
+ iov.iov_base = buf;
+ iov.iov_len = sizeof buf;
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+ msg.msg_control = control;
+ msg.msg_controllen = sizeof control;
+
+ do {
+ len = recvmsg(wl->sock[0], &msg, 0);
+ } while (len < 0 && errno == EINTR);
+
+ if (len < 1)
+ return -1;
+
+ message = (void *) buf;
+ switch (message->opcode) {
+ case WESTON_LAUNCHER_OPEN:
+ ret = handle_open(wl, &msg, len);
+ break;
+ case WESTON_LAUNCHER_DRM_SET_MASTER:
+ ret = handle_setmaster(wl, &msg, len);
+ break;
+ }
+
+ return ret;
+}
+
+static void
+quit(struct weston_launch *wl, int status)
+{
+ int err;
+
+ close(wl->signalfd);
+ close(wl->sock[0]);
+
+ if (wl->new_user) {
+ err = pam_close_session(wl->ph, 0);
+ if (err)
+ fprintf(stderr, "pam_close_session failed: %d: %s\n",
+ err, pam_strerror(wl->ph, err));
+ pam_end(wl->ph, err);
+ }
+
+ exit(status);
+}
+
+static int
+handle_signal(struct weston_launch *wl)
+{
+ struct signalfd_siginfo sig;
+ int pid, status, ret;
+
+ if (read(wl->signalfd, &sig, sizeof sig) != sizeof sig) {
+ error(0, errno, "reading signalfd failed");
+ return -1;
+ }
+
+ switch (sig.ssi_signo) {
+ case SIGCHLD:
+ pid = waitpid(-1, &status, 0);
+ if (pid == wl->child) {
+ wl->child = 0;
+ if (WIFEXITED(status))
+ ret = WEXITSTATUS(status);
+ else if (WIFSIGNALED(status))
+ /*
+ * If weston dies because of signal N, we
+ * return 10+N. This is distinct from
+ * weston-launch dying because of a signal
+ * (128+N).
+ */
+ ret = 10 + WTERMSIG(status);
+ else
+ ret = 0;
+ quit(wl, ret);
+ }
+ break;
+ case SIGTERM:
+ case SIGINT:
+ if (wl->child)
+ kill(wl->child, sig.ssi_signo);
+ break;
+ default:
+ return -1;
+ }
+
+ return 0;
+}
+
+static int
+setup_tty(struct weston_launch *wl, const char *tty)
+{
+ struct stat buf;
+ char *t;
+
+ if (!wl->new_user) {
+ wl->tty = STDIN_FILENO;
+ } else if (tty) {
+ t = ttyname(STDIN_FILENO);
+ if (t && strcmp(t, tty) == 0)
+ wl->tty = STDIN_FILENO;
+ else
+ wl->tty = open(tty, O_RDWR | O_NOCTTY);
+ } else {
+ int tty0 = open("/dev/tty0", O_WRONLY | O_CLOEXEC);
+ char filename[16];
+
+ if (tty0 < 0)
+ error(1, errno, "could not open tty0");
+
+ if (ioctl(tty0, VT_OPENQRY, &wl->ttynr) < 0 || wl->ttynr == -1)
+ error(1, errno, "failed to find non-opened console");
+
+ snprintf(filename, sizeof filename, "/dev/tty%d", wl->ttynr);
+ wl->tty = open(filename, O_RDWR | O_NOCTTY);
+ close(tty0);
+ }
+
+ if (wl->tty < 0)
+ error(1, errno, "failed to open tty");
+
+ if (tty) {
+ if (fstat(wl->tty, &buf) < 0)
+ error(1, errno, "stat %s failed", tty);
+
+ if (major(buf.st_rdev) != TTY_MAJOR)
+ error(1, 0, "invalid tty device: %s", tty);
+
+ wl->ttynr = minor(buf.st_rdev);
+ }
+
+ return 0;
+}
+
+static void
+setup_session(struct weston_launch *wl)
+{
+ char **env;
+ char *term;
+ int i;
+
+ if (wl->tty != STDIN_FILENO) {
+ if (setsid() < 0)
+ error(1, errno, "setsid failed");
+ if (ioctl(wl->tty, TIOCSCTTY, 0) < 0)
+ error(1, errno, "TIOCSCTTY failed - tty is in use");
+ }
+
+ if (setgid(wl->pw->pw_gid) < 0 ||
+#ifdef HAVE_INITGROUPS
+ initgroups(wl->pw->pw_name, wl->pw->pw_gid) < 0 ||
+#endif
+ setuid(wl->pw->pw_uid) < 0)
+ error(1, errno, "dropping privileges failed");
+
+ term = getenv("TERM");
+ clearenv();
+ setenv("TERM", term, 1);
+ setenv("USER", wl->pw->pw_name, 1);
+ setenv("LOGNAME", wl->pw->pw_name, 1);
+ setenv("HOME", wl->pw->pw_dir, 1);
+ setenv("SHELL", wl->pw->pw_shell, 1);
+
+ env = pam_getenvlist(wl->ph);
+ if (env) {
+ for (i = 0; env[i]; ++i) {
+ if (putenv(env[i]) < 0)
+ error(0, 0, "putenv %s failed", env[i]);
+ }
+ free(env);
+ }
+}
+
+static void
+launch_compositor(struct weston_launch *wl, int argc, char *argv[])
+{
+ char command[PATH_MAX];
+ char *child_argv[MAX_ARGV_SIZE];
+ sigset_t mask;
+ int i;
+
+ if (wl->verbose)
+ printf("weston-launch: spawned weston with pid: %d\n", getpid());
+ if (wl->new_user)
+ setup_session(wl);
+
+ if (wl->tty != STDIN_FILENO)
+ setenv_fd("WESTON_TTY_FD", wl->tty);
+
+ setenv_fd("WESTON_LAUNCHER_SOCK", wl->sock[1]);
+
+ unsetenv("DISPLAY");
+
+ /* Do not give our signal mask to the new process. */
+ sigemptyset(&mask);
+ sigaddset(&mask, SIGTERM);
+ sigaddset(&mask, SIGCHLD);
+ sigaddset(&mask, SIGINT);
+ sigprocmask(SIG_UNBLOCK, &mask, NULL);
+
+ snprintf (command, PATH_MAX, "%s \"$ \"", argv[0]);
+
+ child_argv[0] = wl->pw->pw_shell;
+ child_argv[1] = "-l";
+ child_argv[2] = "-c";
+ child_argv[3] = command;
+ for (i = 0; i < argc; ++i)
+ child_argv[4 + i] = argv[i];
+ child_argv[4 + i] = NULL;
+
+ execv(child_argv[0], child_argv);
+ error(1, errno, "exec failed");
+}
+
+static void
+help(const char *name)
+{
+ fprintf(stderr, "Usage: %s [args...] [-- [weston args..]]\n", name);
+ fprintf(stderr, " -u, --user Start session as specified username\n");
+ fprintf(stderr, " -t, --tty Start session on alternative tty\n");
+ fprintf(stderr, " -v, --verbose Be verbose\n");
+ fprintf(stderr, " -h, --help Display this help message\n");
+}
+
+int
+main(int argc, char *argv[])
+{
+ struct weston_launch wl;
+ int i, c;
+ char *tty = NULL;
+ struct option opts[] = {
+ { "user", required_argument, NULL, 'u' },
+ { "tty", required_argument, NULL, 't' },
+ { "verbose", no_argument, NULL, 'v' },
+ { "help", no_argument, NULL, 'h' },
+ { 0, 0, NULL, 0 }
+ };
+
+ memset(&wl, 0, sizeof wl);
+
+ while ((c = getopt_long(argc, argv, "u:t::vh", opts, &i)) != -1) {
+ switch (c) {
+ case 'u':
+ wl.new_user = optarg;
+ if (getuid() != 0)
+ error(1, 0, "Permission denied. -u allowed for root only");
+ break;
+ case 't':
+ tty = optarg;
+ break;
+ case 'v':
+ wl.verbose = 1;
+ break;
+ case 'h':
+ help("weston-launch");
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ if ((argc - optind) > (MAX_ARGV_SIZE - 6))
+ error(1, E2BIG, "Too many arguments to pass to weston");
+
+ if (strcmp (argv[optind], "mutter") &&
+ strcmp (argv[optind], "gnome-shell") &&
+ strcmp (argv[optind], "gnome-shell-real"))
+ error(1, 0, "mutter-launch can only be used to launch mutter or gnome-shell");
+
+ if (wl.new_user)
+ wl.pw = getpwnam(wl.new_user);
+ else
+ wl.pw = getpwuid(getuid());
+ if (wl.pw == NULL)
+ error(1, errno, "failed to get username");
+
+ if (!weston_launch_allowed(&wl))
+ error(1, 0, "Permission denied. You should either:\n"
+#ifdef HAVE_SYSTEMD_LOGIN
+ " - run from an active and local (systemd) session.\n"
+#else
+ " - enable systemd session support for weston-launch.\n"
+#endif
+ " - or add yourself to the 'weston-launch' group.");
+
+ if (setup_tty(&wl, tty) < 0)
+ exit(EXIT_FAILURE);
+
+ if (wl.new_user && setup_pam(&wl) < 0)
+ exit(EXIT_FAILURE);
+
+ if (setup_launcher_socket(&wl) < 0)
+ exit(EXIT_FAILURE);
+
+ if (setup_signals(&wl) < 0)
+ exit(EXIT_FAILURE);
+
+ wl.child = fork();
+ if (wl.child == -1) {
+ error(1, errno, "fork failed");
+ exit(EXIT_FAILURE);
+ }
+
+ if (wl.child == 0)
+ launch_compositor(&wl, argc - optind, argv + optind);
+
+ close(wl.sock[1]);
+ if (wl.tty != STDIN_FILENO)
+ close(wl.tty);
+
+ while (1) {
+ struct pollfd fds[2];
+ int n;
+
+ fds[0].fd = wl.sock[0];
+ fds[0].events = POLLIN;
+ fds[1].fd = wl.signalfd;
+ fds[1].events = POLLIN;
+
+ n = poll(fds, 2, -1);
+ if (n < 0)
+ error(0, errno, "poll failed");
+ if (fds[0].revents & POLLIN)
+ handle_socket_msg(&wl);
+ if (fds[1].revents)
+ handle_signal(&wl);
+ }
+
+ return 0;
+}
diff --git a/src/wayland/weston-launch.h b/src/wayland/weston-launch.h
new file mode 100644
index 0000000..5be013e
--- /dev/null
+++ b/src/wayland/weston-launch.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright © 2012 Benjamin Franzke
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of the copyright holders not be used in
+ * advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission. The copyright holders make
+ * no representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+ * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _WESTON_LAUNCH_H_
+#define _WESTON_LAUNCH_H_
+
+enum weston_launcher_opcode {
+ WESTON_LAUNCHER_OPEN,
+ WESTON_LAUNCHER_DRM_SET_MASTER
+};
+
+struct weston_launcher_message {
+ int opcode;
+};
+
+struct weston_launcher_open {
+ struct weston_launcher_message header;
+ int flags;
+ char path[0];
+};
+
+struct weston_launcher_set_master {
+ struct weston_launcher_message header;
+ int set_master;
+};
+
+#endif
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