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1 /*
2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * The contents of this file constitute Original Code as defined in and
7 * are subject to the Apple Public Source License Version 1.1 (the
8 * "License"). You may not use this file except in compliance with the
9 * License. Please obtain a copy of the License at
10 * http://www.apple.com/publicsource and read it before using this file.
11 *
12 * This Original Code and all software distributed under the License are
13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17 * License for the specific language governing rights and limitations
18 * under the License.
19 *
20 * @APPLE_LICENSE_HEADER_END@
21 */
22
23 #include <mach/mach.h>
24 #include <mach/mach_error.h>
25
26 #include <SystemConfiguration/SCD.h>
27 #include "config.h" /* MiG generated file */
28 #include "SCDPrivate.h"
29
30
31 SCDStatus
32 SCDNotifierInformViaSignal(SCDSessionRef session, pid_t pid, int sig)
33 {
34 SCDSessionPrivateRef sessionPrivate = (SCDSessionPrivateRef)session;
35
36 kern_return_t status;
37 SCDStatus scd_status;
38 task_t task;
39
40 SCDLog(LOG_DEBUG, CFSTR("SCDNotifierInformViaSignal:"));
41 SCDLog(LOG_DEBUG, CFSTR(" pid = %d"), pid);
42 SCDLog(LOG_DEBUG, CFSTR(" sig = %d"), sig);
43
44 if ((session == NULL) || (sessionPrivate->server == MACH_PORT_NULL)) {
45 return SCD_NOSESSION; /* you must have an open session to play */
46 }
47
48 if (SCDOptionGet(NULL, kSCDOptionIsServer)) {
49 /* sorry, neither the server nor any plug-ins can "wait" */
50 return SCD_FAILED;
51 }
52
53 if (sessionPrivate->notifyStatus != NotifierNotRegistered) {
54 /* sorry, you can only have one notification registered at once */
55 return SCD_NOTIFIERACTIVE;
56 }
57
58 if ((sig <= 0) || (sig > NSIG)) {
59 /* sorry, you must specify a valid signal */
60 return SCD_INVALIDARGUMENT;
61 }
62
63 status = task_for_pid(mach_task_self(), pid, &task);
64 if (status != KERN_SUCCESS) {
65 SCDLog(LOG_DEBUG, CFSTR("task_for_pid(): %s"), mach_error_string(status));
66 return SCD_FAILED;
67 }
68
69 status = notifyviasignal(sessionPrivate->server, task, sig, (int *)&scd_status);
70
71 if (status != KERN_SUCCESS) {
72 if (status != MACH_SEND_INVALID_DEST)
73 SCDLog(LOG_DEBUG, CFSTR("notifyviasignal(): %s"), mach_error_string(status));
74 (void) mach_port_destroy(mach_task_self(), sessionPrivate->server);
75 sessionPrivate->server = MACH_PORT_NULL;
76 return SCD_NOSERVER;
77 }
78
79 /* set notifier active */
80 sessionPrivate->notifyStatus = Using_NotifierInformViaSignal;
81
82 return scd_status;
83 }