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* steam-runtime-launch-client — send IPC requests to create child processes
*
* Copyright © 2018 Red Hat, Inc.
* Copyright © 2020-2021 Collabora Ltd.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Based on flatpak-spawn from the flatpak-xdg-utils package.
* Copyright © 2018 Red Hat, Inc.
* Authors:
* Alexander Larsson <alexl@redhat.com>
*/
#include "config.h"
#include <fnmatch.h>
#include <locale.h>
#include <sysexits.h>
#include <sys/signalfd.h>
#include <glib.h>
#include <glib/gstdio.h>
#include <glib-unix.h>
#include <gio/gio.h>
#include <gio/gunixfdlist.h>
#include "steam-runtime-tools/glib-backports-internal.h"
#include "steam-runtime-tools/launcher-internal.h"
#include "steam-runtime-tools/log-internal.h"
#include "steam-runtime-tools/utils-internal.h"
#include "libglnx.h"
#include "flatpak-portal.h"
#include "flatpak-session-helper.h"
typedef enum {
FLATPAK_HOST_COMMAND_FLAGS_CLEAR_ENV = 1 << 0,
FLATPAK_HOST_COMMAND_FLAGS_WATCH_BUS = 1 << 1, /* Since 1.2 */
} FlatpakHostCommandFlags;
typedef struct
{
const char *service_iface;
const char *service_obj_path;
const char *service_bus_name;
const char *send_signal_method;
const char *exit_signal;
const char *launch_method;
guint clear_env_flag;
} Api;
static Api launcher_api =
{
.service_iface = LAUNCHER_IFACE,
.service_obj_path = LAUNCHER_PATH,
.service_bus_name = NULL,
.send_signal_method = "SendSignal",
.exit_signal = "ProcessExited",
.launch_method = "Launch",
.clear_env_flag = PV_LAUNCH_FLAGS_CLEAR_ENV,
};
static const Api host_api =
{
.service_iface = FLATPAK_SESSION_HELPER_INTERFACE_DEVELOPMENT,
.service_obj_path = FLATPAK_SESSION_HELPER_PATH_DEVELOPMENT,
.service_bus_name = FLATPAK_SESSION_HELPER_BUS_NAME,
.send_signal_method = "HostCommandSignal",
.exit_signal = "HostCommandExited",
.launch_method = "HostCommand",
.clear_env_flag = FLATPAK_HOST_COMMAND_FLAGS_CLEAR_ENV,
};
static const Api subsandbox_api =
{
.service_iface = FLATPAK_PORTAL_INTERFACE,
.service_obj_path = FLATPAK_PORTAL_PATH,
.service_bus_name = FLATPAK_PORTAL_BUS_NAME,
.send_signal_method = "SpawnSignal",
.exit_signal = "SpawnExited",
.launch_method = "Spawn",
.clear_env_flag = FLATPAK_SPAWN_FLAGS_CLEAR_ENV,
};
static const Api *api = NULL;
static const char *service_bus_name = NULL;
typedef GUnixFDList AutoUnixFDList;
G_DEFINE_AUTOPTR_CLEANUP_FUNC(AutoUnixFDList, g_object_unref)
static const char * const *global_original_environ = NULL;
static GDBusConnection *bus_or_peer_connection = NULL;
static guint child_pid = 0;
static int launch_exit_status = LAUNCH_EX_USAGE;
static void
process_exited_cb (G_GNUC_UNUSED GDBusConnection *connection,
G_GNUC_UNUSED const gchar *sender_name,
G_GNUC_UNUSED const gchar *object_path,
G_GNUC_UNUSED const gchar *interface_name,
G_GNUC_UNUSED const gchar *signal_name,
GVariant *parameters,
gpointer user_data)
{
GMainLoop *loop = user_data;
guint32 client_pid = 0;
if (!g_variant_is_of_type (parameters, G_VARIANT_TYPE ("(uu)")))
return;
g_variant_get (parameters, "(uu)", &client_pid, &wait_status);
g_debug ("child %d exited: wait status %d", client_pid, wait_status);
if (child_pid == client_pid)
{
int exit_code = 0;
{
/* Smush the signal into an unsigned byte, as the shell does. This is
* not quite right from the perspective of whatever ran flatpak-spawn
* — it will get WIFEXITED() not WIFSIGNALED() — but the
* alternative is to disconnect all signal() handlers then send this
* signal to ourselves and hope it kills us.
*/
}
else
{
/* wait(3p) claims that if the waitpid() call that returned the exit
* code specified neither WUNTRACED nor WIFSIGNALED, then exactly one
* of WIFEXITED() or WIFSIGNALED() will be true.
*/
g_warning ("wait status %d is neither WIFEXITED() nor WIFSIGNALED()",
exit_code = LAUNCH_EX_CANNOT_REPORT;
}
g_debug ("child exit code %d: %d", client_pid, exit_code);
launch_exit_status = exit_code;
g_main_loop_quit (loop);
}
}
static void
forward_signal (int sig)
{
G_GNUC_UNUSED g_autoptr(GVariant) reply = NULL;
gboolean to_process_group = FALSE;
g_autoptr(GError) error = NULL;
g_return_if_fail (api != NULL);
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if (child_pid == 0)
{
/* We are not monitoring a child yet, so let the signal act on
* this main process instead */
if (sig == SIGTSTP || sig == SIGSTOP || sig == SIGTTIN || sig == SIGTTOU)
{
raise (SIGSTOP);
}
else if (sig != SIGCONT)
{
sigset_t mask;
sigemptyset (&mask);
sigaddset (&mask, sig);
/* Unblock it, so that it will be delivered properly this time.
* Use pthread_sigmask instead of sigprocmask because the latter
* has unspecified behaviour in a multi-threaded process. */
pthread_sigmask (SIG_UNBLOCK, &mask, NULL);
raise (sig);
}
return;
}
g_debug ("Forwarding signal: %d", sig);
/* We forward stop requests as real stop, because the default doesn't
seem to be to stop for non-kernel sent TSTP??? */
if (sig == SIGTSTP)
sig = SIGSTOP;
/* ctrl-c/z is typically for the entire process group */
if (sig == SIGINT || sig == SIGSTOP || sig == SIGCONT)
to_process_group = TRUE;
reply = g_dbus_connection_call_sync (bus_or_peer_connection,
service_bus_name, /* NULL if p2p */
api->service_obj_path,
api->service_iface,
api->send_signal_method,
g_variant_new ("(uub)",
child_pid, sig,
to_process_group),
G_VARIANT_TYPE ("()"),
G_DBUS_CALL_FLAGS_NONE,
-1, NULL, &error);
if (error)
g_info ("Failed to forward signal: %s", error->message);
if (sig == SIGSTOP)
{
g_info ("SIGSTOP:ing myself");
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raise (SIGSTOP);
}
}
static gboolean
forward_signal_handler (int sfd,
G_GNUC_UNUSED GIOCondition condition,
G_GNUC_UNUSED gpointer data)
{
struct signalfd_siginfo info;
ssize_t size;
size = read (sfd, &info, sizeof (info));
if (size < 0)
{
if (errno != EINTR && errno != EAGAIN)
g_warning ("Unable to read struct signalfd_siginfo: %s",
g_strerror (errno));
}
else if (size != sizeof (info))
{
g_warning ("Expected struct signalfd_siginfo of size %"
G_GSIZE_FORMAT ", got %" G_GSSIZE_FORMAT,
sizeof (info), size);
}
else
{
forward_signal (info.ssi_signo);
}
return G_SOURCE_CONTINUE;
}
static guint
forward_signals (GError **error)
{
static int forward[] = {
SIGHUP, SIGINT, SIGQUIT, SIGTERM, SIGCONT, SIGTSTP, SIGUSR1, SIGUSR2
};
sigset_t mask;
guint i;
int sfd;
sigemptyset (&mask);
for (i = 0; i < G_N_ELEMENTS (forward); i++)
sigaddset (&mask, forward[i]);
sfd = signalfd (-1, &mask, SFD_NONBLOCK | SFD_CLOEXEC);
if (sfd < 0)
{
glnx_throw_errno_prefix (error, "Unable to watch signals");
return 0;
}
/*
* We have to block the signals, for two reasons:
* - If we didn't, most of them would kill our process.
* Listening for a signal with a signalfd does not prevent the signal's
* default disposition from being acted on.
* - Reading from a signalfd only returns information about the signals
* that are still pending for the process. If we ignored them instead
* of blocking them, they would no longer be pending by the time the
* main loop wakes up and reads from the signalfd.
*/
if (pthread_sigmask (SIG_BLOCK, &mask, NULL) != 0)
{
glnx_throw_errno_prefix (error, "Unable to block signals");
return 0;
}
return g_unix_fd_add (sfd, G_IO_IN, forward_signal_handler, NULL);
}
static void
name_owner_changed (G_GNUC_UNUSED GDBusConnection *connection,
G_GNUC_UNUSED const gchar *sender_name,
G_GNUC_UNUSED const gchar *object_path,
G_GNUC_UNUSED const gchar *interface_name,
G_GNUC_UNUSED const gchar *signal_name,
GVariant *parameters,
G_GNUC_UNUSED gpointer user_data)
{
GMainLoop *loop = user_data;
const char *name, *from, *to;
g_return_if_fail (api != NULL);
g_return_if_fail (service_bus_name != NULL);
g_variant_get (parameters, "(&s&s&s)", &name, &from, &to);
/* Check if the service dies, then we exit, because we can't track it anymore */
if (strcmp (name, service_bus_name) == 0 &&
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strcmp (to, "") == 0)
{
g_debug ("portal exited");
if (child_pid == 0)
launch_exit_status = LAUNCH_EX_FAILED;
else
launch_exit_status = LAUNCH_EX_CANNOT_REPORT;
g_main_loop_quit (loop);
}
}
static void
connection_closed_cb (G_GNUC_UNUSED GDBusConnection *conn,
G_GNUC_UNUSED gboolean remote_peer_vanished,
G_GNUC_UNUSED GError *error,
GMainLoop *loop)
{
g_debug ("D-Bus connection closed, quitting");
if (child_pid == 0)
launch_exit_status = LAUNCH_EX_FAILED;
else
launch_exit_status = LAUNCH_EX_CANNOT_REPORT;
g_main_loop_quit (loop);
}
static guint32
get_portal_version (void)
{
static guint32 version = 0;
g_return_val_if_fail (api != NULL, 0);
g_return_val_if_fail (api == &host_api || api == &subsandbox_api, 0);
if (version == 0)
{
g_autoptr(GError) error = NULL;
g_autoptr(GVariant) reply =
g_dbus_connection_call_sync (bus_or_peer_connection,
service_bus_name,
api->service_obj_path,
"org.freedesktop.DBus.Properties",
"Get",
g_variant_new ("(ss)", api->service_iface, "version"),
G_VARIANT_TYPE ("(v)"),
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL, &error);
if (reply == NULL)
g_debug ("Failed to get version: %s", error->message);
else
{
g_autoptr(GVariant) v = g_variant_get_child_value (reply, 0);
g_autoptr(GVariant) v2 = g_variant_get_variant (v);
version = g_variant_get_uint32 (v2);
}
}
return version;
}
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static void
check_portal_version (const char *option, guint32 version_needed)
{
guint32 portal_version = get_portal_version ();
if (portal_version < version_needed)
{
g_printerr ("--%s not supported by host portal version (need version %d, has %d)\n", option, version_needed, portal_version);
exit (1);
}
}
static guint32
get_portal_supports (void)
{
static guint32 supports = 0;
static gboolean ran = FALSE;
g_return_val_if_fail (api != NULL, 0);
g_return_val_if_fail (api == &host_api || api == &subsandbox_api, 0);
if (!ran)
{
g_autoptr(GError) error = NULL;
g_autoptr(GVariant) reply = NULL;
ran = TRUE;
/* Support flags were added in version 3 */
if (get_portal_version () >= 3)
{
reply = g_dbus_connection_call_sync (bus_or_peer_connection,
service_bus_name,
api->service_obj_path,
"org.freedesktop.DBus.Properties",
"Get",
g_variant_new ("(ss)", api->service_iface, "supports"),
G_VARIANT_TYPE ("(v)"),
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL, &error);
if (reply == NULL)
g_debug ("Failed to get supports: %s", error->message);
else
{
g_autoptr(GVariant) v = g_variant_get_child_value (reply, 0);
g_autoptr(GVariant) v2 = g_variant_get_variant (v);
supports = g_variant_get_uint32 (v2);
}
}
}
return supports;
}
#define NOT_SETUID_ROOT_MESSAGE \
"This feature requires Flatpak to be using a bubblewrap (bwrap) executable\n" \
"that is not setuid root.\n" \
"\n" \
"The non-setuid version of bubblewrap requires a kernel that allows\n" \
"unprivileged users to create new user namespaces.\n" \
"\n" \
"For more details please see:\n" \
"https://github.com/flatpak/flatpak/wiki/User-namespace-requirements\n" \
"\n"
static void
check_portal_supports (const char *option, guint32 supports_needed)
{
guint32 supports = get_portal_supports ();
if ((supports & supports_needed) != supports_needed)
{
g_printerr ("--%s not supported by host portal\n", option);
if (supports_needed == FLATPAK_SPAWN_SUPPORT_FLAGS_EXPOSE_PIDS)
g_printerr ("\n%s", NOT_SETUID_ROOT_MESSAGE);
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static gint32
path_to_handle (GUnixFDList *fd_list,
const char *path,
const char *home_realpath,
const char *flatpak_id,
GError **error)
{
int path_fd = open (path, O_PATH|O_CLOEXEC|O_NOFOLLOW|O_RDONLY);
int saved_errno;
gint32 handle;
if (path_fd < 0)
{
saved_errno = errno;
g_set_error (error, G_IO_ERROR, g_io_error_from_errno (saved_errno),
"Failed to open %s to expose in sandbox: %s",
path, g_strerror (saved_errno));
return -1;
}
if (home_realpath != NULL && flatpak_id != NULL)
{
g_autofree char *real = NULL;
const char *after = NULL;
real = realpath (path, NULL);
if (real != NULL)
after = _srt_get_path_after (real, home_realpath);
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if (after != NULL)
{
g_autofree char *var_path = NULL;
int var_fd = -1;
struct stat path_buf;
struct stat var_buf;
/* @after is possibly "", but that's OK: if @path is exactly $HOME,
* we want to check whether it's the same file as
* ~/.var/app/$FLATPAK_ID, with no suffix */
var_path = g_build_filename (home_realpath, ".var", "app", flatpak_id,
after, NULL);
var_fd = open (var_path, O_PATH|O_CLOEXEC|O_NOFOLLOW|O_RDONLY);
if (var_fd >= 0 &&
fstat (path_fd, &path_buf) == 0 &&
fstat (var_fd, &var_buf) == 0 &&
path_buf.st_dev == var_buf.st_dev &&
path_buf.st_ino == var_buf.st_ino)
{
close (path_fd);
path_fd = var_fd;
}
else
{
close (var_fd);
}
}
}
handle = g_unix_fd_list_append (fd_list, path_fd, error);
if (handle < 0)
{
g_prefix_error (error, "Failed to add fd to list for %s: ", path);
return -1;
}
/* The GUnixFdList keeps a duplicate, so we should release the original */
close (path_fd);
return handle;
}
static gchar **forward_fds = NULL;
static gboolean opt_clear_env = FALSE;
static gchar *opt_dbus_address = NULL;
static gchar *opt_directory = NULL;
static gchar *opt_socket = NULL;
static GHashTable *opt_env = NULL;
static GHashTable *opt_unsetenv = NULL;
static gboolean opt_share_pids = FALSE;
static gboolean opt_terminate = FALSE;
static gboolean opt_verbose = FALSE;
static gboolean opt_version = FALSE;
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static gboolean
opt_env_cb (const char *option_name,
const gchar *value,
G_GNUC_UNUSED gpointer data,
GError **error)
{
g_assert (opt_env != NULL);
g_assert (opt_unsetenv != NULL);
if (g_strcmp0 (option_name, "--env") == 0)
{
g_auto(GStrv) split = g_strsplit (value, "=", 2);
if (split == NULL ||
split[0] == NULL ||
split[0][0] == 0 ||
split[1] == NULL)
{
g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
"Invalid env format %s", value);
return FALSE;
}
g_hash_table_remove (opt_unsetenv, split[0]);
g_hash_table_replace (opt_env,
g_steal_pointer (&split[0]),
g_steal_pointer (&split[1]));
return TRUE;
}
if (g_strcmp0 (option_name, "--pass-env") == 0)
{
const gchar *env = g_getenv (value);
if (env != NULL)
{
g_hash_table_remove (opt_unsetenv, value);
g_hash_table_replace (opt_env, g_strdup (value), g_strdup (env));
}
else
{
g_hash_table_remove (opt_env, value);
g_hash_table_add (opt_unsetenv, g_strdup (value));
}
return TRUE;
}
if (g_strcmp0 (option_name, "--pass-env-matching") == 0)
{
const char * const *iter;
if (global_original_environ == NULL)
return TRUE;
for (iter = global_original_environ; *iter != NULL; iter++)
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{
g_auto(GStrv) split = g_strsplit (*iter, "=", 2);
if (split == NULL ||
split[0] == NULL ||
split[0][0] == 0 ||
split[1] == NULL)
continue;
if (fnmatch (value, split[0], 0) == 0)
{
g_hash_table_remove (opt_unsetenv, split[0]);
g_hash_table_replace (opt_env,
g_steal_pointer (&split[0]),
g_steal_pointer (&split[1]));
}
}
return TRUE;
}
if (g_strcmp0 (option_name, "--unset-env") == 0)
{
g_hash_table_remove (opt_env, value);
g_hash_table_add (opt_unsetenv, g_strdup (value));
return TRUE;
}
g_return_val_if_reached (FALSE);
}
static const GOptionEntry options[] =
{
{ "app-path", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_FILENAME, &opt_app_path,
"Use DIR as the /app for a Flatpak sub-sandbox. "
"Requires '--bus-name=org.freedesktop.portal.Flatpak'.",
"DIR" },
{ "bus-name", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_STRING, &launcher_api.service_bus_name,
"Connect to a Launcher service with this name on the session bus.",
"NAME" },
{ "dbus-address", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_STRING, &opt_dbus_address,
"Connect to a Launcher server listening on this D-Bus address.",
"ADDRESS" },
{ "clear-env", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_NONE, &opt_clear_env,
"Run with clean environment.", NULL },
{ "directory", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_FILENAME, &opt_directory,
"Working directory in which to run the command.", "DIR" },
{ "env", '\0',
G_OPTION_FLAG_FILENAME, G_OPTION_ARG_CALLBACK, opt_env_cb,
"Set environment variable.", "VAR=VALUE" },
{ "forward-fd", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_STRING_ARRAY, &forward_fds,
"Connect a file descriptor to the launched process. "
"fds 0, 1 and 2 are automatically forwarded.",
"FD" },
{ "pass-env", '\0',
G_OPTION_FLAG_FILENAME, G_OPTION_ARG_CALLBACK, opt_env_cb,
"Pass environment variable through, or unset if set.", "VAR" },
{ "pass-env-matching", '\0',
G_OPTION_FLAG_FILENAME, G_OPTION_ARG_CALLBACK, opt_env_cb,
"Pass environment variables matching a shell-style wildcard.",
"WILDCARD" },
{ "share-pids", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_NONE, &opt_share_pids,
"Use same pid namespace as calling sandbox.", NULL },
{ "usr-path", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_FILENAME, &opt_usr_path,
"Use DIR as the /usr for a Flatpak sub-sandbox. "
"Requires '--bus-name=org.freedesktop.portal.Flatpak'.",
"DIR" },
{ "socket", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_STRING, &opt_socket,
"Connect to a Launcher server listening on this AF_UNIX socket.",
"ABSPATH|@ABSTRACT" },
{ "terminate", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_NONE, &opt_terminate,
"Terminate the Launcher server after the COMMAND (if any) has run.",
NULL },
{ "unset-env", '\0',
G_OPTION_FLAG_FILENAME, G_OPTION_ARG_CALLBACK, opt_env_cb,
"Unset environment variable, like env -u.", "VAR" },
{ "verbose", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_NONE, &opt_verbose,
"Be more verbose.", NULL },
{ "version", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_NONE, &opt_version,
"Print version number and exit.", NULL },
{ NULL }
};
int
main (int argc,
char *argv[])
{
g_auto(GStrv) original_environ = NULL;
g_autoptr(GMainLoop) loop = NULL;
g_autoptr(GOptionContext) context = NULL;
g_autoptr(GPtrArray) replacement_command_and_args = NULL;
g_autoptr(GError) local_error = NULL;
GError **error = &local_error;
char **command_and_args;
g_autoptr(FILE) original_stdout = NULL;
g_autoptr(GDBusConnection) session_bus = NULL;
g_autoptr(GDBusConnection) peer_connection = NULL;
g_auto(GVariantBuilder) fd_builder = {};
g_auto(GVariantBuilder) env_builder = {};
g_auto(GVariantBuilder) options_builder = {};
g_autoptr(AutoUnixFDList) fd_list = NULL;
G_GNUC_UNUSED g_autoptr(GVariant) reply = NULL;
gint stdin_handle = -1;
gint stdout_handle = -1;
gint stderr_handle = -1;
guint spawn_flags = 0;
guint signal_source = 0;
gsize i;
GHashTableIter iter;
gpointer key, value;
g_autofree char *home_realpath = NULL;
g_autofree char *service_unique_name = NULL;
setlocale (LC_ALL, "");
original_environ = g_get_environ ();
global_original_environ = (const char * const *) original_environ;
g_set_prgname ("steam-runtime-launch-client");
/* Set up the initial base logging */
_srt_util_set_glib_log_handler (FALSE);
context = g_option_context_new ("COMMAND [ARG...]");
g_option_context_set_summary (context,
"Send IPC requests to create child "
"processes.");
g_option_context_add_main_entries (context, options, NULL);
opt_env = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
opt_unsetenv = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
opt_verbose = _srt_boolean_environment ("PRESSURE_VESSEL_VERBOSE", FALSE);
if (!g_option_context_parse (context, &argc, &argv, error))
goto out;
if (opt_version)
{
g_print ("%s:\n"
" Package: pressure-vessel\n"
" Version: %s\n",
g_get_prgname (), VERSION);
launch_exit_status = 0;
goto out;
}
if (opt_verbose)
_srt_util_set_glib_log_handler (opt_verbose);
original_stdout = _srt_divert_stdout_to_stderr (error);
if (original_stdout == NULL)
{
launch_exit_status = LAUNCH_EX_FAILED;
goto out;
}
if (argc > 1)
/* We have to block the signals we want to forward before we start any
* other thread, and in particular the GDBus worker thread, because
* the signal mask is per-thread. We need all threads to have the same
* mask, otherwise a thread that doesn't have the mask will receive
* process-directed signals, causing the whole process to exit. */
signal_source = forward_signals (error);
if (signal_source == 0)
{
launch_exit_status = LAUNCH_EX_FAILED;
goto out;
}
_srt_setenv_disable_gio_modules ();
flatpak_id = g_environ_getenv (original_environ, "FLATPAK_ID");
if (flatpak_id != NULL)
home_realpath = realpath (g_get_home_dir (), NULL);
if (launcher_api.service_bus_name != NULL && opt_socket != NULL)
{
glnx_throw (error, "--bus-name and --socket cannot both be used");
goto out;
}
if (g_strcmp0 (launcher_api.service_bus_name,
host_api.service_bus_name) == 0)
api = &host_api;
else if (g_strcmp0 (launcher_api.service_bus_name,
subsandbox_api.service_bus_name) == 0)
api = &subsandbox_api;
else
api = &launcher_api;
service_bus_name = api->service_bus_name;
if (api != &launcher_api && opt_terminate)
{
glnx_throw (error,
"--terminate cannot be used with Flatpak services");
goto out;
}
if (api != &subsandbox_api && opt_app_path != NULL)
{
glnx_throw (error,
"--app-path can only be used with a Flatpak subsandbox");
goto out;
}
if (api != &subsandbox_api && opt_usr_path != NULL)
{
glnx_throw (error,
"--usr-path can only be used with a Flatpak subsandbox");
goto out;
}
if (argc >= 2 && strcmp (argv[1], "--") == 0)
{
argv++;
argc--;
}
if (argc < 2)
if (!opt_terminate)
glnx_throw (error, "Usage: %s [OPTIONS] COMMAND [ARG...]",
g_get_prgname ());
command_and_args = NULL;
else
command_and_args = argv + 1;
}
launch_exit_status = LAUNCH_EX_FAILED;
loop = g_main_loop_new (NULL, FALSE);
g_assert (api != NULL);
if (service_bus_name != NULL)
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{
if (opt_dbus_address != NULL || opt_socket != NULL)
{
glnx_throw (error,
"--bus-name cannot be combined with "
"--dbus-address or --socket");
launch_exit_status = LAUNCH_EX_USAGE;
goto out;
}
session_bus = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, error);
if (session_bus == NULL)
{
glnx_prefix_error (error, "Can't find session bus");
goto out;
}
bus_or_peer_connection = session_bus;
}
else if (opt_dbus_address != NULL)
{
if (opt_socket != NULL)
{
glnx_throw (error,
"--dbus-address cannot be combined with --socket");
launch_exit_status = LAUNCH_EX_USAGE;
goto out;
}
peer_connection = g_dbus_connection_new_for_address_sync (opt_dbus_address,
G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT,
NULL,
NULL,
error);
if (peer_connection == NULL)
{
glnx_prefix_error (error, "Can't connect to peer address");
goto out;
}
bus_or_peer_connection = peer_connection;
}
else if (opt_socket != NULL)
{
g_autofree gchar *address = NULL;
g_autofree gchar *escaped = NULL;
if (opt_socket[0] == '@')
{
escaped = g_dbus_address_escape_value (&opt_socket[1]);
address = g_strdup_printf ("unix:abstract=%s", escaped);
}
else if (opt_socket[0] == '/')
{
escaped = g_dbus_address_escape_value (opt_socket);
address = g_strdup_printf ("unix:path=%s", escaped);
}
else
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
"Invalid socket address '%s'", opt_socket);
goto out;
}
peer_connection = g_dbus_connection_new_for_address_sync (address,
G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT,
NULL,
NULL,
error);
if (peer_connection == NULL)
{
glnx_prefix_error (error, "Can't connect to peer socket");
goto out;
}
bus_or_peer_connection = peer_connection;
}
else
{
glnx_throw (error, "--bus-name or --dbus-address or --socket is required");
launch_exit_status = LAUNCH_EX_USAGE;
goto out;
}
g_assert (bus_or_peer_connection != NULL);
if (command_and_args == NULL)
g_assert (opt_terminate); /* already checked */
reply = g_dbus_connection_call_sync (bus_or_peer_connection,
service_bus_name,
api->service_obj_path,
api->service_iface,
"Terminate",
g_variant_new ("()"),
G_VARIANT_TYPE ("()"),
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL, error);
if (local_error != NULL)
g_dbus_error_strip_remote_error (local_error);
if (reply != NULL)
launch_exit_status = 0;
if (api == &launcher_api
&& service_bus_name != NULL
&& service_bus_name[0] != ':')
{
g_autoptr(GVariant) owner_reply = NULL;
/* steam-runtime-launcher-service is stateful, so we want to bind
* to a specific unique bus name (specific instance) and expect signals
* from there.
*
* It also isn't service-activatable, so we don't need to worry about
* whether it is already running or whether it needs to be
* service-activated: we know that service activation is going to fail
* in any case.
*
* We don't need to do this if we were given a unique name already,
* like steam-runtime-launch-client --bus-name=:1.42 -- ... */
owner_reply = g_dbus_connection_call_sync (bus_or_peer_connection,
DBUS_NAME_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,