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1 /*
2 * Copyright (c) 2000, 2001, 2004, 2005, 2009-2011 Apple Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23
24 /*
25 * Modification History
26 *
27 * June 1, 2001 Allan Nathanson <ajn@apple.com>
28 * - public API conversion
29 *
30 * March 31, 2000 Allan Nathanson <ajn@apple.com>
31 * - initial revision
32 */
33
34 #include <mach/mach.h>
35 #include <mach/mach_error.h>
36
37 #include <SystemConfiguration/SystemConfiguration.h>
38 #include <SystemConfiguration/SCPrivate.h>
39 #include "SCDynamicStoreInternal.h"
40 #include "config.h" /* MiG generated file */
41
42 Boolean
43 SCDynamicStoreNotifySignal(SCDynamicStoreRef store, pid_t pid, int sig)
44 {
45 SCDynamicStorePrivateRef storePrivate = (SCDynamicStorePrivateRef)store;
46 kern_return_t status;
47 int sc_status;
48 task_t task;
49
50 if (store == NULL) {
51 /* sorry, you must provide a session */
52 _SCErrorSet(kSCStatusNoStoreSession);
53 return FALSE;
54 }
55
56 if (storePrivate->server == MACH_PORT_NULL) {
57 /* sorry, you must have an open session to play */
58 _SCErrorSet(kSCStatusNoStoreServer);
59 return FALSE;
60 }
61
62 if (storePrivate->notifyStatus != NotifierNotRegistered) {
63 /* sorry, you can only have one notification registered at once */
64 _SCErrorSet(kSCStatusNotifierActive);
65 return FALSE;
66 }
67
68 status = task_for_pid(mach_task_self(), pid, &task);
69 if (status != KERN_SUCCESS) {
70 SCLog(TRUE, LOG_DEBUG, CFSTR("SCDynamicStoreNotifySignal task_for_pid(): %s"), mach_error_string(status));
71 _SCErrorSet(status);
72 return FALSE;
73 }
74
75 retry :
76
77 status = notifyviasignal(storePrivate->server, task, sig, (int *)&sc_status);
78
79 if (__SCDynamicStoreCheckRetryAndHandleError(store,
80 status,
81 &sc_status,
82 "SCDynamicStoreNotifySignal notifyviasignal()")) {
83 goto retry;
84 }
85
86 if (status != KERN_SUCCESS) {
87 _SCErrorSet(status);
88 return FALSE;
89 }
90
91 /* set notifier active */
92 storePrivate->notifyStatus = Using_NotifierInformViaSignal;
93
94 return TRUE;
95 }