1 /* Copyright (c) 2008 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 */
29 #ifdef HAVE_DIX_CONFIG_H
30 #include <dix-config.h>
31 #endif
33 #include <launch.h>
34 #include <asl.h>
35 #include <errno.h>
37 #include "launchd_fd.h"
39 extern aslclient aslc;
41 int launchd_display_fd(void) {
42 launch_data_t sockets_dict, checkin_request, checkin_response;
43 launch_data_t listening_fd_array, listening_fd;
45 /* Get launchd fd */
46 if ((checkin_request = launch_data_new_string(LAUNCH_KEY_CHECKIN)) == NULL) {
47 asl_log(aslc, NULL, ASL_LEVEL_ERR, "launch_data_new_string(\"" LAUNCH_KEY_CHECKIN "\") Unable to create string.\n");
48 return ERROR_FD;
49 }
51 if ((checkin_response = launch_msg(checkin_request)) == NULL) {
52 asl_log(aslc, NULL, ASL_LEVEL_WARNING, "launch_msg(\"" LAUNCH_KEY_CHECKIN "\") IPC failure: %s\n",strerror(errno));
53 return ERROR_FD;
54 }
56 if (LAUNCH_DATA_ERRNO == launch_data_get_type(checkin_response)) {
57 // ignore EACCES, which is common if we weren't started by launchd
58 if (launch_data_get_errno(checkin_response) != EACCES)
59 asl_log(aslc, NULL, ASL_LEVEL_ERR, "launchd check-in failed: %s\n", strerror(launch_data_get_errno(checkin_response)));
60 return ERROR_FD;
61 }
63 sockets_dict = launch_data_dict_lookup(checkin_response, LAUNCH_JOBKEY_SOCKETS);
64 if (NULL == sockets_dict) {
65 asl_log(aslc, NULL, ASL_LEVEL_ERR, "launchd check-in: no sockets found to answer requests on!\n");
66 return ERROR_FD;
67 }
69 if (launch_data_dict_get_count(sockets_dict) > 1) {
70 asl_log(aslc, NULL, ASL_LEVEL_ERR, "launchd check-in: some sockets will be ignored!\n");
71 return ERROR_FD;
72 }
74 listening_fd_array = launch_data_dict_lookup(sockets_dict, BUNDLE_ID_PREFIX":0");
75 if (NULL == listening_fd_array) {
76 listening_fd_array = launch_data_dict_lookup(sockets_dict, ":0");
77 if (NULL == listening_fd_array) {
78 asl_log(aslc, NULL, ASL_LEVEL_ERR, "launchd check-in: No known sockets found to answer requests on! \"%s:0\" and \":0\" failed.\n", BUNDLE_ID_PREFIX);
79 return ERROR_FD;
80 }
81 }
83 if (launch_data_array_get_count(listening_fd_array)!=1) {
84 asl_log(aslc, NULL, ASL_LEVEL_ERR, "launchd check-in: Expected 1 socket from launchd, got %u)\n",
85 (unsigned)launch_data_array_get_count(listening_fd_array));
86 return ERROR_FD;
87 }
89 listening_fd=launch_data_array_get_index(listening_fd_array, 0);
90 return launch_data_get_fd(listening_fd);
91 }