D-Bus: dbus-server-launchd.c Source File

D-Bus 1.14.10

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#include <unistd.h>
43
44#include "dbus-misc.h"
45#include "dbus-server-socket.h"
46#include "dbus-sysdeps-unix.h"
47
48/* put other private launchd functions here */
49
50#endif /* DBUS_ENABLE_LAUNCHD */
51
66 DBusServer *
67_dbus_server_new_for_launchd (const char *launchd_env_var, DBusError * error)
68 {
69#ifdef DBUS_ENABLE_LAUNCHD
70 DBusServer *server;
71 DBusString address;
72 int launchd_fd = -1;
73 launch_data_t sockets_dict, checkin_response;
74 launch_data_t checkin_request;
75 launch_data_t listening_fd_array, listening_fd;
76 launch_data_t environment_dict, environment_param;
77 const char *launchd_socket_path, *display;
78
79 launchd_socket_path = _dbus_getenv (launchd_env_var);
80 display = _dbus_getenv ("DISPLAY");
81
82 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
83
84 if (launchd_socket_path == NULL || *launchd_socket_path == '\0')
85 {
86 dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
87 "launchd's environment variable %s is empty, but should contain a socket path.\n", launchd_env_var);
88 return NULL;
89 }
90
91 if (!_dbus_string_init (&address))
92 {
93 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
94 return NULL;
95 }
96 if (!_dbus_string_append (&address, "unix:path="))
97 {
98 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
99 goto l_failed_0;
100 }
101 if (!_dbus_string_append (&address, launchd_socket_path))
102 {
103 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
104 goto l_failed_0;
105 }
106
107 if ((checkin_request = launch_data_new_string (LAUNCH_KEY_CHECKIN)) == NULL)
108 {
109 dbus_set_error (error, DBUS_ERROR_NO_MEMORY,
110 "launch_data_new_string(\"%s\") Unable to create string.\n",
111 LAUNCH_KEY_CHECKIN);
112 goto l_failed_0;
113 }
114
115 if ((checkin_response = launch_msg (checkin_request)) == NULL)
116 {
117 dbus_set_error (error, DBUS_ERROR_IO_ERROR,
118 "launch_msg(\"%s\") IPC failure: %s\n",
119 LAUNCH_KEY_CHECKIN, strerror (errno));
120 goto l_failed_0;
121 }
122
123 if (LAUNCH_DATA_ERRNO == launch_data_get_type (checkin_response))
124 {
125 dbus_set_error (error, DBUS_ERROR_FAILED, "Check-in failed: %s\n",
126 strerror (launch_data_get_errno (checkin_response)));
127 goto l_failed_0;
128 }
129
130 sockets_dict =
131 launch_data_dict_lookup (checkin_response, LAUNCH_JOBKEY_SOCKETS);
132 if (NULL == sockets_dict)
133 {
134 dbus_set_error (error, DBUS_ERROR_IO_ERROR,
135 "No sockets found to answer requests on!\n");
136 goto l_failed_0;
137 }
138
139 listening_fd_array =
140 launch_data_dict_lookup (sockets_dict, "unix_domain_listener");
141 if (NULL == listening_fd_array)
142 {
143 dbus_set_error (error, DBUS_ERROR_IO_ERROR,
144 "No known sockets found to answer requests on!\n");
145 goto l_failed_0;
146 }
147
148 if (launch_data_array_get_count (listening_fd_array) != 1)
149 {
150 dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
151 "Expected 1 socket from launchd, got %d.\n",
152 launch_data_array_get_count (listening_fd_array));
153 goto l_failed_0;
154 }
155
156 listening_fd = launch_data_array_get_index (listening_fd_array, 0);
157 launchd_fd = launch_data_get_fd (listening_fd);
158
159 _dbus_fd_set_close_on_exec (launchd_fd);
160
161 if (launchd_fd < 0)
162 {
163 _DBUS_ASSERT_ERROR_IS_SET (error);
164 goto l_failed_0;
165 if (display == NULL || *display == '\0')
166 {
167 environment_dict = launch_data_dict_lookup (checkin_response, LAUNCH_JOBKEY_USERENVIRONMENTVARIABLES);
168 if (NULL == environment_dict)
169 {
170 _dbus_warn ("Unable to retrieve user environment from launchd.");
171 }
172 else
173 {
174 environment_param = launch_data_dict_lookup (environment_dict, "DISPLAY");
175 if (NULL == environment_param)
176 {
177 _dbus_warn ("Unable to retrieve DISPLAY from launchd.");
178 }
179 else
180 {
181 display = launch_data_get_string(environment_param);
182 dbus_setenv ("DISPLAY", display);
183 }
184 }
185 }
186
187 }
188
189 server = _dbus_server_new_for_socket (&launchd_fd, 1, &address, 0, error);
190 if (server == NULL)
191 {
192 goto l_failed_0;
193 }
194
195 _dbus_string_free (&address);
196
197 return server;
198
199 l_failed_0:
200 if (launchd_fd >= 0)
201 close (launchd_fd);
202
203 _dbus_string_free (&address);
204
205 return NULL;
206#else /* DBUS_ENABLE_LAUNCHD */
207 dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
208 "address type 'launchd' requested, but launchd support not compiled in");
209 return NULL;
210#endif
211 }
212
dbus_set_error
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
_dbus_warn
void _dbus_warn(const char *format,...)
Prints a warning message to stderr.
Definition dbus-internals.c:238
NULL
#define NULL
A null pointer, defined appropriately for C or C++.
Definition dbus-macros.h:49
dbus_setenv
DBUS_EXPORT dbus_bool_t dbus_setenv(const char *variable, const char *value)
Wrapper for setenv().
Definition dbus-sysdeps.c:124
DBUS_ERROR_BAD_ADDRESS
#define DBUS_ERROR_BAD_ADDRESS
A D-Bus bus address was malformed.
Definition dbus-protocol.h:371
DBUS_ERROR_IO_ERROR
#define DBUS_ERROR_IO_ERROR
Something went wrong reading or writing to a socket, for example.
Definition dbus-protocol.h:369
DBUS_ERROR_LIMITS_EXCEEDED
#define DBUS_ERROR_LIMITS_EXCEEDED
Some limited resource is exhausted.
Definition dbus-protocol.h:375
DBUS_ERROR_FAILED
#define DBUS_ERROR_FAILED
A generic error; "something went wrong" - see the error message for more.
Definition dbus-protocol.h:359
DBUS_ERROR_NO_MEMORY
#define DBUS_ERROR_NO_MEMORY
There was not enough memory to complete an operation.
Definition dbus-protocol.h:361
_dbus_server_new_for_launchd
DBusServer * _dbus_server_new_for_launchd(const char *launchd_env_var, DBusError *error)
Creates a new server from launchd.
Definition dbus-server-launchd.c:67
_dbus_server_new_for_socket
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.
Definition dbus-server-socket.c:286
_dbus_string_append
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:966
_dbus_string_init
dbus_bool_t _dbus_string_init(DBusString *str)
Initializes a string.
Definition dbus-string.c:182
_dbus_string_free
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init(), and fills it with the same contents as _DBUS_STRING_IN...
Definition dbus-string.c:278
_dbus_fd_set_close_on_exec
void _dbus_fd_set_close_on_exec(int fd)
Sets the file descriptor to be close on exec.
Definition dbus-sysdeps-unix.c:3517
_dbus_getenv
const char * _dbus_getenv(const char *varname)
Wrapper for getenv().
Definition dbus-sysdeps.c:195
DBusError
Object representing an exception.
Definition dbus-errors.h:49
DBusServer
Internals of DBusServer object.
Definition dbus-server-protected.h:57
DBusString
Definition dbus-string.h:43