1/* 2 * Copyright (c) 2000-2004, 2006, 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 24, 2000 Allan Nathanson <ajn@apple.com> 31 * - initial revision 32 */ 33 34#include <unistd.h> 35#include <sys/types.h> 36 37#include "configd.h" 38#include "configd_server.h" 39#include "session.h" 40 41__private_extern__ 42int 43__SCDynamicStoreNotifySignal(SCDynamicStoreRef store, pid_t pid, int sig) 44{ 45 SCDynamicStorePrivateRef storePrivate = (SCDynamicStorePrivateRef)store; 46 CFStringRef sessionKey; 47 CFDictionaryRef info; 48 49 if (storePrivate->notifyStatus != NotifierNotRegistered) { 50 /* sorry, you can only have one notification registered at once */ 51 return kSCStatusNotifierActive; 52 } 53 54 if (pid == getpid()) { 55 /* sorry, you can't request that configd be signalled */ 56 return kSCStatusInvalidArgument; 57 } 58 59 if ((sig <= 0) || (sig > NSIG)) { 60 /* sorry, you must specify a valid signal */ 61 return kSCStatusInvalidArgument; 62 } 63 64 /* push out a notification if any changes are pending */ 65 sessionKey = CFStringCreateWithFormat(NULL, NULL, CFSTR("%d"), storePrivate->server); 66 info = CFDictionaryGetValue(sessionData, sessionKey); 67 CFRelease(sessionKey); 68 if (info && CFDictionaryContainsKey(info, kSCDChangedKeys)) { 69 CFNumberRef sessionNum; 70 71 if (needsNotification == NULL) 72 needsNotification = CFSetCreateMutable(NULL, 73 0, 74 &kCFTypeSetCallBacks); 75 76 sessionNum = CFNumberCreate(NULL, kCFNumberIntType, &storePrivate->server); 77 CFSetAddValue(needsNotification, sessionNum); 78 CFRelease(sessionNum); 79 } 80 81 return kSCStatusOK; 82} 83 84 85__private_extern__ 86kern_return_t 87_notifyviasignal(mach_port_t server, 88 task_t task, 89 int sig, 90 int *sc_status) 91{ 92 serverSessionRef mySession = getSession(server); 93 pid_t pid; 94 kern_return_t status; 95 SCDynamicStorePrivateRef storePrivate; 96 97 if (mySession == NULL) { 98 /* sorry, you must have an open session to play */ 99 *sc_status = kSCStatusNoStoreSession; 100 if (task != TASK_NULL) { 101 (void) mach_port_deallocate(mach_task_self(), task); 102 } 103 return KERN_SUCCESS; 104 } 105 storePrivate = (SCDynamicStorePrivateRef)mySession->store; 106 107 if (task != TASK_NULL) { 108 status = pid_for_task(task, &pid); 109 if (status != KERN_SUCCESS) { 110 /* could not determine pid for task */ 111 *sc_status = kSCStatusFailed; 112 (void) mach_port_deallocate(mach_task_self(), task); 113 return KERN_SUCCESS; 114 } 115 } else { 116 /* sorry, you must specify a valid task */ 117 *sc_status = kSCStatusInvalidArgument; 118 return KERN_SUCCESS; 119 } 120 121 *sc_status = __SCDynamicStoreNotifySignal(mySession->store, pid, sig); 122 if (*sc_status != kSCStatusOK) { 123 __MACH_PORT_DEBUG(TRUE, "*** _notifyviasignal __SCDynamicStoreNotifySignal failed: releasing task)", task); 124 (void) mach_port_deallocate(mach_task_self(), task); 125 return KERN_SUCCESS; 126 } 127 128 __MACH_PORT_DEBUG(TRUE, "*** _notifyviasignal", task); 129 storePrivate->notifyStatus = Using_NotifierInformViaSignal; 130 storePrivate->notifySignal = sig; 131 storePrivate->notifySignalTask = task; 132 133 return KERN_SUCCESS; 134} 135