D-Bus  1.13.7
dbus-server-launchd.c
1 /* dbus-server-launchd.c Server methods for interacting with launchd.
2  * Copyright (C) 2007, Tanner Lovelace <lovelace@wayfarer.org>
3  * Copyright (C) 2008, Colin Walters <walters@verbum.org>
4  * Copyright (C) 2008-2009, Benjamin Reed <rangerrick@befunk.com>
5  * Copyright (C) 2009, Jonas Bähr <jonas.baehr@web.de>
6  *
7  * Permission is hereby granted, free of charge, to any person
8  * obtaining a copy of this software and associated documentation
9  * files (the "Software"), to deal in the Software without
10  * restriction, including without limitation the rights to use, copy,
11  * modify, merge, publish, distribute, sublicense, and/or sell copies
12  * of the Software, and to permit persons to whom the Software is
13  * furnished to do so, subject to the following conditions:
14  *
15  * The above copyright notice and this permission notice shall be
16  * included in all copies or substantial portions of the Software.
17  *
18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
22  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
23  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
25  * DEALINGS IN THE SOFTWARE.
26  */
27 
28 #include <config.h>
29 #include "dbus-server-launchd.h"
30 
39 #ifdef DBUS_ENABLE_LAUNCHD
40 #include <launch.h>
41 #include <errno.h>
42 
43 #include "dbus-misc.h"
44 #include "dbus-server-socket.h"
45 #include "dbus-sysdeps-unix.h"
46 
47 /* put other private launchd functions here */
48 
49 #endif /* DBUS_ENABLE_LAUNCHD */
50 
65 DBusServer *
66 _dbus_server_new_for_launchd (const char *launchd_env_var, DBusError * error)
67  {
68 #ifdef DBUS_ENABLE_LAUNCHD
69  DBusServer *server;
70  DBusString address;
71  int launchd_fd = -1;
72  launch_data_t sockets_dict, checkin_response;
73  launch_data_t checkin_request;
74  launch_data_t listening_fd_array, listening_fd;
75  launch_data_t environment_dict, environment_param;
76  const char *launchd_socket_path, *display;
77 
78  launchd_socket_path = _dbus_getenv (launchd_env_var);
79  display = _dbus_getenv ("DISPLAY");
80 
81  _DBUS_ASSERT_ERROR_IS_CLEAR (error);
82 
83  if (launchd_socket_path == NULL || *launchd_socket_path == '\0')
84  {
86  "launchd's environment variable %s is empty, but should contain a socket path.\n", launchd_env_var);
87  return NULL;
88  }
89 
90  if (!_dbus_string_init (&address))
91  {
93  return NULL;
94  }
95  if (!_dbus_string_append (&address, "unix:path="))
96  {
98  goto l_failed_0;
99  }
100  if (!_dbus_string_append (&address, launchd_socket_path))
101  {
103  goto l_failed_0;
104  }
105 
106  if ((checkin_request = launch_data_new_string (LAUNCH_KEY_CHECKIN)) == NULL)
107  {
109  "launch_data_new_string(\"%s\") Unable to create string.\n",
110  LAUNCH_KEY_CHECKIN);
111  goto l_failed_0;
112  }
113 
114  if ((checkin_response = launch_msg (checkin_request)) == NULL)
115  {
117  "launch_msg(\"%s\") IPC failure: %s\n",
118  LAUNCH_KEY_CHECKIN, strerror (errno));
119  goto l_failed_0;
120  }
121 
122  if (LAUNCH_DATA_ERRNO == launch_data_get_type (checkin_response))
123  {
124  dbus_set_error (error, DBUS_ERROR_FAILED, "Check-in failed: %s\n",
125  strerror (launch_data_get_errno (checkin_response)));
126  goto l_failed_0;
127  }
128 
129  sockets_dict =
130  launch_data_dict_lookup (checkin_response, LAUNCH_JOBKEY_SOCKETS);
131  if (NULL == sockets_dict)
132  {
134  "No sockets found to answer requests on!\n");
135  goto l_failed_0;
136  }
137 
138  listening_fd_array =
139  launch_data_dict_lookup (sockets_dict, "unix_domain_listener");
140  if (NULL == listening_fd_array)
141  {
143  "No known sockets found to answer requests on!\n");
144  goto l_failed_0;
145  }
146 
147  if (launch_data_array_get_count (listening_fd_array) != 1)
148  {
150  "Expected 1 socket from launchd, got %d.\n",
151  launch_data_array_get_count (listening_fd_array));
152  goto l_failed_0;
153  }
154 
155  listening_fd = launch_data_array_get_index (listening_fd_array, 0);
156  launchd_fd = launch_data_get_fd (listening_fd);
157 
158  _dbus_fd_set_close_on_exec (launchd_fd);
159 
160  if (launchd_fd < 0)
161  {
162  _DBUS_ASSERT_ERROR_IS_SET (error);
163  goto l_failed_0;
164  if (display == NULL || *display == '\0')
165  {
166  environment_dict = launch_data_dict_lookup (checkin_response, LAUNCH_JOBKEY_USERENVIRONMENTVARIABLES);
167  if (NULL == environment_dict)
168  {
169  _dbus_warn ("Unable to retrieve user environment from launchd.");
170  }
171  else
172  {
173  environment_param = launch_data_dict_lookup (environment_dict, "DISPLAY");
174  if (NULL == environment_param)
175  {
176  _dbus_warn ("Unable to retrieve DISPLAY from launchd.");
177  }
178  else
179  {
180  display = launch_data_get_string(environment_param);
181  dbus_setenv ("DISPLAY", display);
182  }
183  }
184  }
185 
186  }
187 
188  server = _dbus_server_new_for_socket (&launchd_fd, 1, &address, 0, error);
189  if (server == NULL)
190  {
191  goto l_failed_0;
192  }
193 
194  _dbus_string_free (&address);
195 
196  return server;
197 
198  l_failed_0:
199  if (launchd_fd >= 0)
200  close (launchd_fd);
201 
202  _dbus_string_free (&address);
203 
204  return NULL;
205 #else /* DBUS_ENABLE_LAUNCHD */
207  "address type 'launchd' requested, but launchd support not compiled in");
208  return NULL;
209 #endif
210  }
211 
dbus_bool_t _dbus_string_append(DBusString *str, const char *buffer)
Appends a nul-terminated C-style string to a DBusString.
Definition: dbus-string.c:952
#define NULL
A null pointer, defined appropriately for C or C++.
DBusServer * _dbus_server_new_for_launchd(const char *launchd_env_var, DBusError *error)
Creates a new server from launchd.
Internals of DBusServer object.
dbus_bool_t _dbus_string_init(DBusString *str)
Initializes a string.
Definition: dbus-string.c:175
#define DBUS_ERROR_IO_ERROR
Something went wrong reading or writing to a socket, for example.
DBusServer * _dbus_server_new_for_socket(DBusSocket *fds, int n_fds, const DBusString *address, DBusNonceFile *noncefile, DBusError *error)
Creates a new server listening on the given file descriptor.
DBUS_EXPORT dbus_bool_t dbus_setenv(const char *variable, const char *value)
Wrapper for setenv().
Definition: dbus-sysdeps.c:124
void _dbus_warn(const char *format,...)
Prints a warning message to stderr.
Object representing an exception.
Definition: dbus-errors.h:48
#define DBUS_ERROR_BAD_ADDRESS
A D-Bus bus address was malformed.
void dbus_set_error(DBusError *error, const char *name, const char *format,...)
Assigns an error name and message to a DBusError.
Definition: dbus-errors.c:354
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init(), and fills it with the same contents as #_DBUS_STRING_I...
Definition: dbus-string.c:264
#define DBUS_ERROR_FAILED
A generic error; "something went wrong" - see the error message for more.
void _dbus_fd_set_close_on_exec(int fd)
Sets the file descriptor to be close on exec.
#define DBUS_ERROR_NO_MEMORY
There was not enough memory to complete an operation.
const char * _dbus_getenv(const char *varname)
Wrapper for getenv().
Definition: dbus-sysdeps.c:195
#define DBUS_ERROR_LIMITS_EXCEEDED
Some limited resource is exhausted.