/* GLib testing framework examples and tests
*
* Copyright (C) 2008-2010 Red Hat, Inc.
*
* This library 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 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, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: David Zeuthen <davidz@redhat.com>
*/
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <stdio.h>
#include <gio/gio.h>
#include "gdbus-sessionbus.h"
/* ---------------------------------------------------------------------------------------------------- */
/* Utilities for bringing up and tearing down session message bus instances */
static void
watch_parent (gint fd)
{
GPollFD fds[1];
gint num_events;
gchar buf[512];
gssize bytes_read;
GArray *buses_to_kill_array;
fds[0].fd = fd;
fds[0].events = G_IO_HUP | G_IO_IN;
fds[0].revents = 0;
buses_to_kill_array = g_array_new (FALSE, TRUE, sizeof (guint));
do
{
guint pid;
guint n;
num_events = g_poll (fds, 1, -1);
if (num_events == 0)
continue;
if (fds[0].revents == G_IO_HUP)
{
for (n = 0; n < buses_to_kill_array->len; n++)
{
pid = g_array_index (buses_to_kill_array, guint, n);
g_print ("cleaning up bus with pid %d\n", pid);
kill (pid, SIGTERM);
}
g_array_free (buses_to_kill_array, TRUE);
exit (0);
}
//g_debug ("data from parent");
memset (buf, '\0', sizeof buf);
again:
bytes_read = read (fds[0].fd, buf, sizeof buf);
if (bytes_read < 0 && (errno == EAGAIN || errno == EINTR))
goto again;
if (sscanf (buf, "add %d\n", &pid) == 1)
{
g_array_append_val (buses_to_kill_array, pid);
}
else if (sscanf (buf, "remove %d\n", &pid) == 1)
{
for (n = 0; n < buses_to_kill_array->len; n++)
{
if (g_array_index (buses_to_kill_array, guint, n) == pid)
{
g_array_remove_index (buses_to_kill_array, n);
pid = 0;
break;
}
}
if (pid != 0)
{
g_warning ("unknown pid %d to remove", pid);
}
}
else
{
g_warning ("unknown command from parent '%s'", buf);
}
}
while (TRUE);
}
static GHashTable *session_bus_address_to_pid = NULL;
static gint pipe_fds[2];
const gchar *
session_bus_up_with_address (const gchar *given_address)
{
gchar *address;
int stdout_fd;
GError *error;
gchar *argv[] = {"dbus-daemon", "--print-address", "--config-file=foo", NULL};
GPid pid;
gchar buf[512];
ssize_t bytes_read;
gchar *config_file_name;
gint config_file_fd;
GString *config_file_contents;
address = NULL;
error = NULL;
config_file_name = NULL;
config_file_fd = -1;
argv[2] = NULL;
config_file_fd = g_file_open_tmp ("g-dbus-tests-XXXXXX",
&config_file_name,
&error);
if (config_file_fd < 0)
{
g_warning ("Error creating temporary config file: %s", error->message);
g_error_free (error);
goto out;
}
config_file_contents = g_string_new (NULL);
g_string_append (config_file_contents, "<busconfig>\n");
g_string_append (config_file_contents, " <type>session</type>\n");
g_string_append_printf (config_file_contents, " <listen>%s</listen>\n", given_address);
g_string_append (config_file_contents,
" <policy context=\"default\">\n"
" <!-- Allow everything to be sent -->\n"
" <allow send_destination=\"*\" eavesdrop=\"true\"/>\n"
" <!-- Allow everything to be received -->\n"
" <allow eavesdrop=\"true\"/>\n"
" <!-- Allow anyone to own anything -->\n"
" <allow own=\"*\"/>\n"
" </policy>\n");
g_string_append (config_file_contents, "</busconfig>\n");
if (write (config_file_fd, config_file_contents->str, config_file_contents->len) != (gssize) config_file_contents->len)
{
g_warning ("Error writing %d bytes to config file: %m", (gint) config_file_contents->len);
g_string_free (config_file_contents, TRUE);
goto out;
}
g_string_free (config_file_contents, TRUE);
argv[2] = g_strdup_printf ("--config-file=%s", config_file_name);
if (session_bus_address_to_pid == NULL)
{
/* keep a mapping from session bus address to the pid */
session_bus_address_to_pid = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
/* fork a child to clean up session buses when we are killed */
if (pipe (pipe_fds) != 0)
{
g_warning ("pipe() failed: %m");
g_assert_not_reached ();
}
switch (fork ())
{
case -1:
g_warning ("fork() failed: %m");
g_assert_not_reached ();
break;
case 0:
/* child */
close (pipe_fds[1]);
watch_parent (pipe_fds[0]);
break;
default:
/* parent */
close (pipe_fds[0]);
break;
}
//atexit (cleanup_session_buses);
/* TODO: need to handle the cases where we crash */
}
else
{
/* check if we already have a bus running for this address */
if (g_hash_table_lookup (session_bus_address_to_pid, given_address) != NULL)
{
g_warning ("Already have a bus instance for the given address %s", given_address);
goto out;
}
}
if (!g_spawn_async_with_pipes (NULL,
argv,
NULL,
G_SPAWN_SEARCH_PATH,
NULL,
NULL,
&pid,
NULL,
&stdout_fd,
NULL,
&error))
{
g_warning ("Error spawning dbus-daemon: %s", error->message);
g_error_free (error);
goto out;
}
memset (buf, '\0', sizeof buf);
again:
bytes_read = read (stdout_fd, buf, sizeof buf);
if (bytes_read < 0 && (errno == EAGAIN || errno == EINTR))
goto again;
close (stdout_fd);
if (bytes_read == 0 || bytes_read == sizeof buf)
{
g_warning ("Error reading address from dbus daemon, %d bytes read", (gint) bytes_read);
kill (SIGTERM, pid);
goto out;
}
address = g_strdup (buf);
g_strstrip (address);
/* write the pid to the child so it can kill it when we die */
g_snprintf (buf, sizeof buf, "add %d\n", (guint) pid);
write (pipe_fds[1], buf, strlen (buf));
/* start dbus-monitor */
if (g_getenv ("G_DBUS_MONITOR") != NULL)
{
g_spawn_command_line_async ("dbus-monitor --session", NULL);
usleep (500 * 1000);
}
g_hash_table_insert (session_bus_address_to_pid, address, GUINT_TO_POINTER (pid));
out:
if (config_file_fd > 0)
{
if (close (config_file_fd) != 0)
{
g_warning ("Error closing fd for config file %s: %m", config_file_name);
}
g_assert (config_file_name != NULL);
if (unlink (config_file_name) != 0)
{
g_warning ("Error unlinking config file %s: %m", config_file_name);
}
}
g_free (argv[2]);
g_free (config_file_name);
return address;
}
void
session_bus_down_with_address (const gchar *address)
{
gpointer value;
GPid pid;
gchar buf[512];
g_assert (address != NULL);
g_assert (session_bus_address_to_pid != NULL);
value = g_hash_table_lookup (session_bus_address_to_pid, address);
g_assert (value != NULL);
pid = GPOINTER_TO_UINT (g_hash_table_lookup (session_bus_address_to_pid, address));
kill (pid, SIGTERM);
/* write the pid to the child so it won't kill it when we die */
g_snprintf (buf, sizeof buf, "remove %d\n", (guint) pid);
write (pipe_fds[1], buf, strlen (buf));
g_hash_table_remove (session_bus_address_to_pid, address);
}
static gchar *temporary_address = NULL;
static gchar *temporary_address_used_by_bus = NULL;
const gchar *
session_bus_get_temporary_address (void)
{
if (temporary_address == NULL)
{
temporary_address = g_strdup_printf ("unix:path=/tmp/g-dbus-tests-pid-%d", getpid ());
}
return temporary_address;
}
const gchar *
session_bus_up (void)
{
if (temporary_address_used_by_bus != NULL)
{
g_warning ("There is already a session bus up");
goto out;
}
temporary_address_used_by_bus = g_strdup (session_bus_up_with_address (session_bus_get_temporary_address ()));
out:
return temporary_address_used_by_bus;
}
void
session_bus_down (void)
{
if (temporary_address_used_by_bus == NULL)
{
g_warning ("There is not a session bus up");
}
else
{
session_bus_down_with_address (temporary_address_used_by_bus);
g_free (temporary_address_used_by_bus);
temporary_address_used_by_bus = NULL;
}
}