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Merge branch 'dbus-daemon-print-address-fd' into 'main'

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gtestdbus: Print the dbus address on a specific FD intead of stdout

Closes #2537

See merge request GNOME/glib!2354
This commit is contained in:
Philip Withnall 2021-11-23 13:32:24 +00:00
commit 56b0b8069d
1 changed files with 59 additions and 30 deletions
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89
gio/gtestdbus.c
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@ -32,6 +32,8 @@
#endif
#ifdef G_OS_WIN32
#include <io.h>
#include <fcntl.h>
#include <windows.h>
#endif
#include <glib.h>
@ -44,8 +46,8 @@
#include "glibintl.h"
#ifdef G_OS_WIN32
#include <windows.h>
#ifdef G_OS_UNIX
#include "glib-unix.h"
#endif
/* -------------------------------------------------------------------------- */
@ -436,7 +438,6 @@ struct _GTestDBusPrivate
GTestDBusFlags flags;
GPtrArray *service_dirs;
GPid bus_pid;
gint bus_stdout_fd;
gchar *bus_address;
gboolean up;
};
@ -596,58 +597,87 @@ write_config_file (GTestDBus *self)
return path;
}
static gboolean
make_pipe (gint pipe_fds[2],
GError **error)
{
#if defined(G_OS_UNIX)
return g_unix_open_pipe (pipe_fds, FD_CLOEXEC, error);
#elif defined(G_OS_WIN32)
if (_pipe (pipe_fds, 4096, _O_BINARY) < 0)
{
int errsv = errno;
g_set_error (error, G_SPAWN_ERROR, G_SPAWN_ERROR_FAILED,
_("Failed to create pipe for communicating with child process (%s)"),
g_strerror (errsv));
return FALSE;
}
return TRUE;
#else
g_set_error (error, G_SPAWN_ERROR, G_SPAWN_ERROR_FAILED,
_("Pipes are not supported in this platform"));
return FALSE;
#endif
}
static void
start_daemon (GTestDBus *self)
{
const gchar *argv[] = {"dbus-daemon", "--print-address", "--config-file=foo", NULL};
gint pipe_fds[2] = {-1, -1};
gchar *config_path;
gchar *config_arg;
gchar *print_address;
GIOChannel *channel;
gint stdout_fd2;
gsize termpos;
GError *error = NULL;
if (g_getenv ("G_TEST_DBUS_DAEMON") != NULL)
argv[0] = (gchar *)g_getenv ("G_TEST_DBUS_DAEMON");
make_pipe (pipe_fds, &error);
g_assert_no_error (error);
print_address = g_strdup_printf ("--print-address=%d", pipe_fds[1]);
argv[1] = print_address;
g_assert_no_error (error);
/* Write config file and set its path in argv */
config_path = write_config_file (self);
config_arg = g_strdup_printf ("--config-file=%s", config_path);
argv[2] = config_arg;
/* Spawn dbus-daemon */
g_spawn_async_with_pipes (NULL,
(gchar **) argv,
NULL,
/* We Need this to get the pid returned on win32 */
G_SPAWN_DO_NOT_REAP_CHILD |
G_SPAWN_SEARCH_PATH |
/* dbus-daemon will not abuse our descriptors, and
* passing this means we can use posix_spawn() for speed */
G_SPAWN_LEAVE_DESCRIPTORS_OPEN,
NULL,
NULL,
&self->priv->bus_pid,
NULL,
&self->priv->bus_stdout_fd,
NULL,
&error);
g_spawn_async_with_pipes_and_fds (NULL,
argv,
NULL,
/* We Need this to get the pid returned on win32 */
G_SPAWN_DO_NOT_REAP_CHILD |
G_SPAWN_SEARCH_PATH |
/* dbus-daemon will not abuse our descriptors, and
* passing this means we can use posix_spawn() for speed */
G_SPAWN_LEAVE_DESCRIPTORS_OPEN,
NULL, NULL,
-1, -1, -1,
&pipe_fds[1], &pipe_fds[1], 1,
&self->priv->bus_pid,
NULL, NULL, NULL,
&error);
g_assert_no_error (error);
_g_test_watcher_add_pid (self->priv->bus_pid);
/* Read bus address from daemon' stdout. We have to be careful to avoid
* closing the FD, as it is passed to any D-Bus service activated processes,
* and if we close it, they will get a SIGPIPE and die when they try to write
* to their stdout. */
stdout_fd2 = dup (self->priv->bus_stdout_fd);
g_assert_cmpint (stdout_fd2, >=, 0);
channel = g_io_channel_unix_new (stdout_fd2);
/* Read bus address from pipe */
channel = g_io_channel_unix_new (pipe_fds[0]);
pipe_fds[0] = -1;
g_io_channel_set_close_on_unref (channel, TRUE);
g_io_channel_read_line (channel, &self->priv->bus_address, NULL,
&termpos, &error);
g_assert_no_error (error);
self->priv->bus_address[termpos] = '\0';
close (pipe_fds[1]);
pipe_fds[1] = -1;
/* start dbus-monitor */
if (g_getenv ("G_DBUS_MONITOR") != NULL)
@ -671,6 +701,7 @@ start_daemon (GTestDBus *self)
if (g_unlink (config_path) != 0)
g_assert_not_reached ();
g_free (print_address);
g_free (config_path);
g_free (config_arg);
}
@ -687,8 +718,6 @@ stop_daemon (GTestDBus *self)
_g_test_watcher_remove_pid (self->priv->bus_pid);
g_spawn_close_pid (self->priv->bus_pid);
self->priv->bus_pid = 0;
close (self->priv->bus_stdout_fd);
self->priv->bus_stdout_fd = -1;
g_free (self->priv->bus_address);
self->priv->bus_address = NULL;