1 /* Copyright (c) 2008-2012 Apple Inc.
2 *
3 * Permission is hereby granted, free of charge, to any person
4 * obtaining a copy of this software and associated documentation files
5 * (the "Software"), to deal in the Software without restriction,
6 * including without limitation the rights to use, copy, modify, merge,
7 * publish, distribute, sublicense, and/or sell copies of the Software,
8 * and to permit persons to whom the Software is furnished to do so,
9 * subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be
12 * included in all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
15 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
17 * NONINFRINGEMENT. IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT
18 * HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
19 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Except as contained in this notice, the name(s) of the above
24 * copyright holders shall not be used in advertising or otherwise to
25 * promote the sale, use or other dealings in this Software without
26 * prior written authorization.
27 */
28
29 #ifdef HAVE_DIX_CONFIG_H
30 #include <dix-config.h>
31 #endif
32
33 #include <launch.h>
34 #include <asl.h>
35 #include <errno.h>
36
37 #include "launchd_fd.h"
38
39 extern aslclient aslc;
40
41 int
launchd_display_fd(void)42 launchd_display_fd(void)
43 {
44 launch_data_t sockets_dict, checkin_request, checkin_response;
45 launch_data_t listening_fd_array, listening_fd;
46
47 /* Get launchd fd */
48 if ((checkin_request = launch_data_new_string(LAUNCH_KEY_CHECKIN)) ==
49 NULL) {
50 asl_log(
51 aslc, NULL, ASL_LEVEL_ERR,
52 "launch_data_new_string(\"" LAUNCH_KEY_CHECKIN
53 "\") Unable to create string.\n");
54 return ERROR_FD;
55 }
56
57 if ((checkin_response = launch_msg(checkin_request)) == NULL) {
58 asl_log(aslc, NULL, ASL_LEVEL_WARNING,
59 "launch_msg(\"" LAUNCH_KEY_CHECKIN "\") IPC failure: %s\n",
60 strerror(
61 errno));
62 return ERROR_FD;
63 }
64
65 if (LAUNCH_DATA_ERRNO == launch_data_get_type(checkin_response)) {
66 // ignore EACCES, which is common if we weren't started by launchd
67 if (launch_data_get_errno(checkin_response) != EACCES)
68 asl_log(aslc, NULL, ASL_LEVEL_ERR,
69 "launchd check-in failed: %s\n",
70 strerror(launch_data_get_errno(
71 checkin_response)));
72 return ERROR_FD;
73 }
74
75 sockets_dict = launch_data_dict_lookup(checkin_response,
76 LAUNCH_JOBKEY_SOCKETS);
77 if (NULL == sockets_dict) {
78 asl_log(aslc, NULL, ASL_LEVEL_ERR,
79 "launchd check-in: no sockets found to answer requests on!\n");
80 return ERROR_FD;
81 }
82
83 if (launch_data_dict_get_count(sockets_dict) > 1) {
84 asl_log(aslc, NULL, ASL_LEVEL_ERR,
85 "launchd check-in: some sockets will be ignored!\n");
86 return ERROR_FD;
87 }
88
89 listening_fd_array = launch_data_dict_lookup(sockets_dict,
90 BUNDLE_ID_PREFIX ":0");
91 if (NULL == listening_fd_array) {
92 listening_fd_array = launch_data_dict_lookup(sockets_dict, ":0");
93 if (NULL == listening_fd_array) {
94 asl_log(
95 aslc, NULL, ASL_LEVEL_ERR,
96 "launchd check-in: No known sockets found to answer requests on! \"%s:0\" and \":0\" failed.\n",
97 BUNDLE_ID_PREFIX);
98 return ERROR_FD;
99 }
100 }
101
102 if (launch_data_array_get_count(listening_fd_array) != 1) {
103 asl_log(aslc, NULL, ASL_LEVEL_ERR,
104 "launchd check-in: Expected 1 socket from launchd, got %u)\n",
105 (unsigned)launch_data_array_get_count(
106 listening_fd_array));
107 return ERROR_FD;
108 }
109
110 listening_fd = launch_data_array_get_index(listening_fd_array, 0);
111 return launch_data_get_fd(listening_fd);
112 }
113