[apple/configd.git] / configd.tproj / _SCD.c

/*
 * Copyright (c) 2000, 2001, 2003-2005, 2009, 2011, 2012, 2015, 2016 Apple Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_LICENSE_HEADER_END@
 */

/*
 * Modification History
 *
 * June 1, 2001			Allan Nathanson <ajn@apple.com>
 * - public API conversion
 *
 * June 2, 2000			Allan Nathanson <ajn@apple.com>
 * - initial revision
 */


#include <unistd.h>

#include "configd.h"
#include "configd_server.h"
#include "session.h"


__private_extern__ CFMutableDictionaryRef	sessionData		= NULL;

__private_extern__ CFMutableDictionaryRef	storeData		= NULL;

__private_extern__ CFMutableDictionaryRef	patternData		= NULL;

__private_extern__ CFMutableSetRef		changedKeys		= NULL;

__private_extern__ CFMutableSetRef		deferredRemovals	= NULL;

__private_extern__ CFMutableSetRef		removedSessionKeys	= NULL;

__private_extern__ CFMutableSetRef		needsNotification	= NULL;


__private_extern__
void
_addWatcher(CFNumberRef sessionNum, CFStringRef watchedKey)
{
	CFDictionaryRef		dict;
	CFMutableDictionaryRef	newDict;
	CFArrayRef		watchers;
	CFMutableArrayRef	newWatchers;
	CFArrayRef		watcherRefs;
	CFMutableArrayRef	newWatcherRefs;
	CFIndex			i;
	int			refCnt;
	CFNumberRef		refNum;

	/*
	 * Get the dictionary associated with this key out of the store
	 */
	dict = CFDictionaryGetValue(storeData, watchedKey);
	if (dict != NULL) {
		newDict = CFDictionaryCreateMutableCopy(NULL, 0, dict);
	} else {
		newDict = CFDictionaryCreateMutable(NULL,
						    0,
						    &kCFTypeDictionaryKeyCallBacks,
						    &kCFTypeDictionaryValueCallBacks);
	}

	/*
	 * Get the set of watchers out of the keys dictionary
	 */
	watchers    = CFDictionaryGetValue(newDict, kSCDWatchers);
	watcherRefs = CFDictionaryGetValue(newDict, kSCDWatcherRefs);
	if (watchers) {
		newWatchers    = CFArrayCreateMutableCopy(NULL, 0, watchers);
		newWatcherRefs = CFArrayCreateMutableCopy(NULL, 0, watcherRefs);
	} else {
		newWatchers    = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
		newWatcherRefs = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
	}

	/*
	 * Add my session to the set of watchers
	 */
	i = CFArrayGetFirstIndexOfValue(newWatchers,
					CFRangeMake(0, CFArrayGetCount(newWatchers)),
					sessionNum);
	if (i == kCFNotFound) {
		/* if this is the first instance of this session watching this key */
		CFArrayAppendValue(newWatchers, sessionNum);
		refCnt = 1;
		refNum = CFNumberCreate(NULL, kCFNumberIntType, &refCnt);
		CFArrayAppendValue(newWatcherRefs, refNum);
		CFRelease(refNum);
	} else {
		/* if this is another instance of this session watching this key */
		refNum = CFArrayGetValueAtIndex(newWatcherRefs, i);
		CFNumberGetValue(refNum, kCFNumberIntType, &refCnt);
		refCnt++;
		refNum = CFNumberCreate(NULL, kCFNumberIntType, &refCnt);
		CFArraySetValueAtIndex(newWatcherRefs, i, refNum);
		CFRelease(refNum);
	}

	/*
	 * Update the keys dictionary
	 */
	CFDictionarySetValue(newDict, kSCDWatchers, newWatchers);
	CFRelease(newWatchers);
	CFDictionarySetValue(newDict, kSCDWatcherRefs, newWatcherRefs);
	CFRelease(newWatcherRefs);

	/*
	 * Update the store for this key
	 */
	CFDictionarySetValue(storeData, watchedKey, newDict);
	CFRelease(newDict);

#ifdef	DEBUG
	SC_log(LOG_DEBUG, "  _addWatcher: %@, %@", sessionNum, watchedKey);
#endif	/* DEBUG */

	return;
}


__private_extern__
void
_removeWatcher(CFNumberRef sessionNum, CFStringRef watchedKey)
{
	CFDictionaryRef		dict;
	CFMutableDictionaryRef	newDict;
	CFArrayRef		watchers;
	CFMutableArrayRef	newWatchers;
	CFArrayRef		watcherRefs;
	CFMutableArrayRef	newWatcherRefs;
	CFIndex			i;
	int			refCnt;
	CFNumberRef		refNum;

	/*
	 * Get the dictionary associated with this key out of the store
	 */
	dict = CFDictionaryGetValue(storeData, watchedKey);
	if ((dict == NULL) || !CFDictionaryContainsKey(dict, kSCDWatchers)) {
		/* key doesn't exist (isn't this really fatal?) */
#ifdef	DEBUG
		SC_log(LOG_DEBUG, "  _removeWatcher: %@, %@, key not watched", sessionNum, watchedKey);
#endif	/* DEBUG */
		return;
	}
	newDict = CFDictionaryCreateMutableCopy(NULL, 0, dict);

	/*
	 * Get the set of watchers out of the keys dictionary and
	 * remove this session from the list.
	 */
	watchers       = CFDictionaryGetValue(newDict, kSCDWatchers);
	newWatchers    = CFArrayCreateMutableCopy(NULL, 0, watchers);

	watcherRefs    = CFDictionaryGetValue(newDict, kSCDWatcherRefs);
	newWatcherRefs = CFArrayCreateMutableCopy(NULL, 0, watcherRefs);

	/* locate the session reference */
	i = CFArrayGetFirstIndexOfValue(newWatchers,
					CFRangeMake(0, CFArrayGetCount(newWatchers)),
					sessionNum);
	if (i == kCFNotFound) {
#ifdef	DEBUG
		SC_log(LOG_DEBUG, "  _removeWatcher: %@, %@, session not watching", sessionNum, watchedKey);
#endif	/* DEBUG */
		CFRelease(newDict);
		CFRelease(newWatchers);
		CFRelease(newWatcherRefs);
		return;
	}

	/* remove one session reference */
	refNum = CFArrayGetValueAtIndex(newWatcherRefs, i);
	CFNumberGetValue(refNum, kCFNumberIntType, &refCnt);
	if (--refCnt > 0) {
		refNum = CFNumberCreate(NULL, kCFNumberIntType, &refCnt);
		CFArraySetValueAtIndex(newWatcherRefs, i, refNum);
		CFRelease(refNum);
	} else {
		/* if this was the last reference */
		CFArrayRemoveValueAtIndex(newWatchers, i);
		CFArrayRemoveValueAtIndex(newWatcherRefs, i);
	}

	if (CFArrayGetCount(newWatchers) > 0) {
		/* if this key is still being "watched" */
		CFDictionarySetValue(newDict, kSCDWatchers, newWatchers);
		CFDictionarySetValue(newDict, kSCDWatcherRefs, newWatcherRefs);
	} else {
		/* no watchers left, remove the empty set */
		CFDictionaryRemoveValue(newDict, kSCDWatchers);
		CFDictionaryRemoveValue(newDict, kSCDWatcherRefs);
	}
	CFRelease(newWatchers);
	CFRelease(newWatcherRefs);

	if (CFDictionaryGetCount(newDict) > 0) {
		/* if this key is still active */
		CFDictionarySetValue(storeData, watchedKey, newDict);
	} else {
		/* no information left, remove the empty dictionary */
		CFDictionaryRemoveValue(storeData, watchedKey);
	}
	CFRelease(newDict);

#ifdef	DEBUG
	SC_log(LOG_DEBUG, "  _removeWatcher: %@, %@", sessionNum, watchedKey);
#endif	/* DEBUG */

	return;
}


#define N_QUICK	64


__private_extern__
void
pushNotifications()
{
	CFIndex				notifyCnt;
	int				server;
	const void *			sessionsToNotify_q[N_QUICK];
	const void **			sessionsToNotify	= sessionsToNotify_q;
	SCDynamicStorePrivateRef	storePrivate;
	serverSessionRef		theSession;

	if (needsNotification == NULL)
		return;		/* if no sessions need to be kicked */

	notifyCnt = CFSetGetCount(needsNotification);
	if (notifyCnt > (CFIndex)(sizeof(sessionsToNotify_q) / sizeof(CFNumberRef)))
		sessionsToNotify = CFAllocatorAllocate(NULL, notifyCnt * sizeof(CFNumberRef), 0);
	CFSetGetValues(needsNotification, sessionsToNotify);
	while (--notifyCnt >= 0) {
		(void) CFNumberGetValue(sessionsToNotify[notifyCnt],
					kCFNumberIntType,
					&server);
		theSession = getSession(server);
		assert(theSession != NULL);

		storePrivate = (SCDynamicStorePrivateRef)theSession->store;

		/*
		 * deliver notifications to client sessions
		 */
		if ((storePrivate->notifyStatus == Using_NotifierInformViaMachPort) &&
		    (storePrivate->notifyPort != MACH_PORT_NULL)) {
			/*
			 * Associate notification activity with the client
			 */
			os_activity_scope(theSession->activity);

			/*
			 * Post notification as mach message
			 */
			SC_trace("-->port : %5d : port = %d",
				 storePrivate->server,
				 storePrivate->notifyPort);

			/* use a random (and non-zero) identifier */
			while (storePrivate->notifyPortIdentifier == 0) {
				storePrivate->notifyPortIdentifier = (mach_msg_id_t)random();
			}

			_SC_sendMachMessage(storePrivate->notifyPort, storePrivate->notifyPortIdentifier);
		}

		if ((storePrivate->notifyStatus == Using_NotifierInformViaFD) &&
		    (storePrivate->notifyFile >= 0)) {
			ssize_t		written;

			/*
			 * Associate notification activity with the client
			 */
			os_activity_scope(theSession->activity);

			SC_trace("-->fd   : %5d : fd = %d, msgid = %d",
				 storePrivate->server,
				 storePrivate->notifyFile,
				 storePrivate->notifyFileIdentifier);

			written = write(storePrivate->notifyFile,
					&storePrivate->notifyFileIdentifier,
					sizeof(storePrivate->notifyFileIdentifier));
			if (written == -1) {
				if (errno == EWOULDBLOCK) {
#ifdef	DEBUG
					SC_log(LOG_DEBUG, "sorry, only one outstanding notification per session");
#endif	/* DEBUG */
				} else {
#ifdef	DEBUG
					SC_log(LOG_DEBUG, "could not send notification, write() failed: %s",
					      strerror(errno));
#endif	/* DEBUG */
					storePrivate->notifyFile = -1;
				}
			} else if (written != sizeof(storePrivate->notifyFileIdentifier)) {
#ifdef	DEBUG
				SC_log(LOG_DEBUG, "could not send notification, incomplete write()");
#endif	/* DEBUG */
				storePrivate->notifyFile = -1;
			}
		}

		if ((storePrivate->notifyStatus == Using_NotifierInformViaSignal) &&
		    (storePrivate->notifySignal > 0)) {
			kern_return_t	status;
			pid_t		pid;

			/*
			 * Associate notification activity with the client
			 */
			os_activity_scope(theSession->activity);

			/*
			 * Post notification as signal
			 */
			status = pid_for_task(storePrivate->notifySignalTask, &pid);
			if (status == KERN_SUCCESS) {
				SC_trace("-->sig  : %5d : pid = %d, signal = sig%s (%d)",
					 storePrivate->server,
					 pid,
					 sys_signame[storePrivate->notifySignal],
					 storePrivate->notifySignal);

				if (kill(pid, storePrivate->notifySignal) != 0) {
					if (errno != ESRCH) {
						SC_log(LOG_NOTICE, "could not send sig%s to PID %d: %s",
						       sys_signame[storePrivate->notifySignal],
						       pid,
						       strerror(errno));
					}
				}
			} else {
				mach_port_type_t	pt;

				__MACH_PORT_DEBUG(TRUE, "*** pushNotifications pid_for_task failed: releasing task", storePrivate->notifySignalTask);
				if (mach_port_type(mach_task_self(), storePrivate->notifySignalTask, &pt) == KERN_SUCCESS) {
					if ((pt & MACH_PORT_TYPE_DEAD_NAME) != 0) {
						SC_log(LOG_NOTICE, "pid_for_task() failed: %s", mach_error_string(status));
					}
				} else {
					SC_log(LOG_NOTICE, "mach_port_type() failed: %s", mach_error_string(status));
				}

				/* don't bother with any more attempts */
				(void) mach_port_deallocate(mach_task_self(), storePrivate->notifySignalTask);
				storePrivate->notifySignal     = 0;
				storePrivate->notifySignalTask = TASK_NULL;
			}
	       }
	}
	if (sessionsToNotify != sessionsToNotify_q) CFAllocatorDeallocate(NULL, sessionsToNotify);

	/*
	 * this list of notifications have been posted, wait for some more.
	 */
	CFRelease(needsNotification);
	needsNotification = NULL;

	return;
}
Commit	Line	Data
5958d7c0	1	/*
942cecd7	2	* Copyright (c) 2000, 2001, 2003-2005, 2009, 2011, 2012, 2015, 2016 Apple Inc. All rights reserved.
5958d7c0 A	3	*
5958d7c0 A	4	* @APPLE_LICENSE_HEADER_START@
9de8ab86	5	*
009ee3c6 A	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.
9de8ab86	12	*
009ee3c6 A	13	* The Original Code and all software distributed under the License are
009ee3c6 A	14	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
5958d7c0 A	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
5958d7c0 A	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
009ee3c6 A	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.
9de8ab86	20	*
5958d7c0 A	21	* @APPLE_LICENSE_HEADER_END@
	22	*/
	23
0fae82ee A	24	/*
	25	* Modification History
	26	*
	27	* June 1, 2001 Allan Nathanson <ajn@apple.com>
	28	* - public API conversion
	29	*
	30	* June 2, 2000 Allan Nathanson <ajn@apple.com>
	31	* - initial revision
	32	*/
	33
5958d7c0	34
dbf6a266 A	35	#include <unistd.h>
dbf6a266 A	36
5958d7c0	37	#include "configd.h"
dbf6a266 A	38	#include "configd_server.h"
dbf6a266 A	39	#include "session.h"
5958d7c0 A	40
5958d7c0 A	41
009ee3c6	42	__private_extern__ CFMutableDictionaryRef sessionData = NULL;
0fae82ee	43
009ee3c6	44	__private_extern__ CFMutableDictionaryRef storeData = NULL;
5958d7c0	45
009ee3c6	46	__private_extern__ CFMutableDictionaryRef patternData = NULL;
5958d7c0	47
009ee3c6	48	__private_extern__ CFMutableSetRef changedKeys = NULL;
5958d7c0	49
009ee3c6	50	__private_extern__ CFMutableSetRef deferredRemovals = NULL;
5958d7c0	51
009ee3c6	52	__private_extern__ CFMutableSetRef removedSessionKeys = NULL;
5958d7c0	53
009ee3c6	54	__private_extern__ CFMutableSetRef needsNotification = NULL;
5958d7c0	55
5958d7c0	56
009ee3c6	57	__private_extern__
5958d7c0 A	58	void
	59	_addWatcher(CFNumberRef sessionNum, CFStringRef watchedKey)
	60	{
	61	CFDictionaryRef dict;
	62	CFMutableDictionaryRef newDict;
	63	CFArrayRef watchers;
	64	CFMutableArrayRef newWatchers;
	65	CFArrayRef watcherRefs;
	66	CFMutableArrayRef newWatcherRefs;
	67	CFIndex i;
	68	int refCnt;
	69	CFNumberRef refNum;
	70
	71	/*
0fae82ee	72	* Get the dictionary associated with this key out of the store
5958d7c0	73	*/
0fae82ee	74	dict = CFDictionaryGetValue(storeData, watchedKey);
942cecd7	75	if (dict != NULL) {
5958d7c0 A	76	newDict = CFDictionaryCreateMutableCopy(NULL, 0, dict);
	77	} else {
	78	newDict = CFDictionaryCreateMutable(NULL,
	79	0,
	80	&kCFTypeDictionaryKeyCallBacks,
	81	&kCFTypeDictionaryValueCallBacks);
	82	}
	83
	84	/*
	85	* Get the set of watchers out of the keys dictionary
	86	*/
	87	watchers = CFDictionaryGetValue(newDict, kSCDWatchers);
	88	watcherRefs = CFDictionaryGetValue(newDict, kSCDWatcherRefs);
	89	if (watchers) {
	90	newWatchers = CFArrayCreateMutableCopy(NULL, 0, watchers);
	91	newWatcherRefs = CFArrayCreateMutableCopy(NULL, 0, watcherRefs);
	92	} else {
	93	newWatchers = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
	94	newWatcherRefs = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
	95	}
	96
	97	/*
	98	* Add my session to the set of watchers
	99	*/
	100	i = CFArrayGetFirstIndexOfValue(newWatchers,
	101	CFRangeMake(0, CFArrayGetCount(newWatchers)),
	102	sessionNum);
dbf6a266	103	if (i == kCFNotFound) {
5958d7c0 A	104	/* if this is the first instance of this session watching this key */
	105	CFArrayAppendValue(newWatchers, sessionNum);
	106	refCnt = 1;
	107	refNum = CFNumberCreate(NULL, kCFNumberIntType, &refCnt);
	108	CFArrayAppendValue(newWatcherRefs, refNum);
	109	CFRelease(refNum);
	110	} else {
	111	/* if this is another instance of this session watching this key */
	112	refNum = CFArrayGetValueAtIndex(newWatcherRefs, i);
	113	CFNumberGetValue(refNum, kCFNumberIntType, &refCnt);
	114	refCnt++;
	115	refNum = CFNumberCreate(NULL, kCFNumberIntType, &refCnt);
	116	CFArraySetValueAtIndex(newWatcherRefs, i, refNum);
	117	CFRelease(refNum);
	118	}
	119
	120	/*
	121	* Update the keys dictionary
	122	*/
	123	CFDictionarySetValue(newDict, kSCDWatchers, newWatchers);
	124	CFRelease(newWatchers);
	125	CFDictionarySetValue(newDict, kSCDWatcherRefs, newWatcherRefs);
	126	CFRelease(newWatcherRefs);
	127
	128	/*
0fae82ee	129	* Update the store for this key
5958d7c0	130	*/
0fae82ee	131	CFDictionarySetValue(storeData, watchedKey, newDict);
5958d7c0 A	132	CFRelease(newDict);
5958d7c0 A	133
dbf6a266	134	#ifdef DEBUG
9de8ab86	135	SC_log(LOG_DEBUG, " _addWatcher: %@, %@", sessionNum, watchedKey);
dbf6a266	136	#endif /* DEBUG */
5958d7c0 A	137
	138	return;
	139	}
	140
	141
009ee3c6	142	__private_extern__
5958d7c0 A	143	void
	144	_removeWatcher(CFNumberRef sessionNum, CFStringRef watchedKey)
	145	{
	146	CFDictionaryRef dict;
	147	CFMutableDictionaryRef newDict;
	148	CFArrayRef watchers;
	149	CFMutableArrayRef newWatchers;
	150	CFArrayRef watcherRefs;
	151	CFMutableArrayRef newWatcherRefs;
	152	CFIndex i;
	153	int refCnt;
	154	CFNumberRef refNum;
	155
	156	/*
0fae82ee	157	* Get the dictionary associated with this key out of the store
5958d7c0	158	*/
0fae82ee	159	dict = CFDictionaryGetValue(storeData, watchedKey);
942cecd7	160	if ((dict == NULL) \|\| !CFDictionaryContainsKey(dict, kSCDWatchers)) {
5958d7c0	161	/* key doesn't exist (isn't this really fatal?) */
dbf6a266	162	#ifdef DEBUG
9de8ab86	163	SC_log(LOG_DEBUG, " _removeWatcher: %@, %@, key not watched", sessionNum, watchedKey);
dbf6a266	164	#endif /* DEBUG */
5958d7c0 A	165	return;
	166	}
	167	newDict = CFDictionaryCreateMutableCopy(NULL, 0, dict);
	168
	169	/*
	170	* Get the set of watchers out of the keys dictionary and
	171	* remove this session from the list.
	172	*/
	173	watchers = CFDictionaryGetValue(newDict, kSCDWatchers);
	174	newWatchers = CFArrayCreateMutableCopy(NULL, 0, watchers);
	175
	176	watcherRefs = CFDictionaryGetValue(newDict, kSCDWatcherRefs);
	177	newWatcherRefs = CFArrayCreateMutableCopy(NULL, 0, watcherRefs);
	178
	179	/* locate the session reference */
	180	i = CFArrayGetFirstIndexOfValue(newWatchers,
	181	CFRangeMake(0, CFArrayGetCount(newWatchers)),
	182	sessionNum);
dbf6a266 A	183	if (i == kCFNotFound) {
dbf6a266 A	184	#ifdef DEBUG
9de8ab86	185	SC_log(LOG_DEBUG, " _removeWatcher: %@, %@, session not watching", sessionNum, watchedKey);
dbf6a266	186	#endif /* DEBUG */
5958d7c0 A	187	CFRelease(newDict);
	188	CFRelease(newWatchers);
	189	CFRelease(newWatcherRefs);
	190	return;
	191	}
	192
	193	/* remove one session reference */
	194	refNum = CFArrayGetValueAtIndex(newWatcherRefs, i);
	195	CFNumberGetValue(refNum, kCFNumberIntType, &refCnt);
	196	if (--refCnt > 0) {
	197	refNum = CFNumberCreate(NULL, kCFNumberIntType, &refCnt);
	198	CFArraySetValueAtIndex(newWatcherRefs, i, refNum);
	199	CFRelease(refNum);
	200	} else {
	201	/* if this was the last reference */
	202	CFArrayRemoveValueAtIndex(newWatchers, i);
	203	CFArrayRemoveValueAtIndex(newWatcherRefs, i);
	204	}
	205
	206	if (CFArrayGetCount(newWatchers) > 0) {
	207	/* if this key is still being "watched" */
	208	CFDictionarySetValue(newDict, kSCDWatchers, newWatchers);
	209	CFDictionarySetValue(newDict, kSCDWatcherRefs, newWatcherRefs);
	210	} else {
	211	/* no watchers left, remove the empty set */
	212	CFDictionaryRemoveValue(newDict, kSCDWatchers);
	213	CFDictionaryRemoveValue(newDict, kSCDWatcherRefs);
	214	}
	215	CFRelease(newWatchers);
	216	CFRelease(newWatcherRefs);
	217
	218	if (CFDictionaryGetCount(newDict) > 0) {
	219	/* if this key is still active */
0fae82ee	220	CFDictionarySetValue(storeData, watchedKey, newDict);
5958d7c0 A	221	} else {
5958d7c0 A	222	/* no information left, remove the empty dictionary */
0fae82ee	223	CFDictionaryRemoveValue(storeData, watchedKey);
5958d7c0 A	224	}
	225	CFRelease(newDict);
	226
dbf6a266	227	#ifdef DEBUG
9de8ab86	228	SC_log(LOG_DEBUG, " _removeWatcher: %@, %@", sessionNum, watchedKey);
dbf6a266 A	229	#endif /* DEBUG */
	230
	231	return;
	232	}
	233
	234
5e9ce69e A	235	#define N_QUICK 64
	236
	237
dbf6a266 A	238	__private_extern__
dbf6a266 A	239	void
942cecd7	240	pushNotifications()
dbf6a266	241	{
dbf6a266 A	242	CFIndex notifyCnt;
dbf6a266 A	243	int server;
5e9ce69e A	244	const void * sessionsToNotify_q[N_QUICK];
5e9ce69e A	245	const void ** sessionsToNotify = sessionsToNotify_q;
dbf6a266	246	SCDynamicStorePrivateRef storePrivate;
5e9ce69e	247	serverSessionRef theSession;
dbf6a266 A	248
	249	if (needsNotification == NULL)
	250	return; /* if no sessions need to be kicked */
	251
	252	notifyCnt = CFSetGetCount(needsNotification);
5e9ce69e A	253	if (notifyCnt > (CFIndex)(sizeof(sessionsToNotify_q) / sizeof(CFNumberRef)))
5e9ce69e A	254	sessionsToNotify = CFAllocatorAllocate(NULL, notifyCnt * sizeof(CFNumberRef), 0);
dbf6a266 A	255	CFSetGetValues(needsNotification, sessionsToNotify);
	256	while (--notifyCnt >= 0) {
	257	(void) CFNumberGetValue(sessionsToNotify[notifyCnt],
	258	kCFNumberIntType,
	259	&server);
	260	theSession = getSession(server);
942cecd7 A	261	assert(theSession != NULL);
942cecd7 A	262
dbf6a266 A	263	storePrivate = (SCDynamicStorePrivateRef)theSession->store;
	264
	265	/*
	266	* deliver notifications to client sessions
	267	*/
	268	if ((storePrivate->notifyStatus == Using_NotifierInformViaMachPort) &&
	269	(storePrivate->notifyPort != MACH_PORT_NULL)) {
942cecd7 A	270	/*
	271	* Associate notification activity with the client
	272	*/
	273	os_activity_scope(theSession->activity);
	274
dbf6a266 A	275	/*
	276	* Post notification as mach message
	277	*/
942cecd7	278	SC_trace("-->port : %5d : port = %d",
9de8ab86	279	storePrivate->server,
77a550b6 A	280	storePrivate->notifyPort);
	281
	282	/* use a random (and non-zero) identifier */
	283	while (storePrivate->notifyPortIdentifier == 0) {
	284	storePrivate->notifyPortIdentifier = (mach_msg_id_t)random();
	285	}
a40a14f8	286
edebe297	287	_SC_sendMachMessage(storePrivate->notifyPort, storePrivate->notifyPortIdentifier);
dbf6a266 A	288	}
	289
	290	if ((storePrivate->notifyStatus == Using_NotifierInformViaFD) &&
	291	(storePrivate->notifyFile >= 0)) {
	292	ssize_t written;
	293
942cecd7 A	294	/*
	295	* Associate notification activity with the client
	296	*/
	297	os_activity_scope(theSession->activity);
	298
	299	SC_trace("-->fd : %5d : fd = %d, msgid = %d",
9de8ab86 A	300	storePrivate->server,
	301	storePrivate->notifyFile,
	302	storePrivate->notifyFileIdentifier);
dbf6a266 A	303
	304	written = write(storePrivate->notifyFile,
	305	&storePrivate->notifyFileIdentifier,
	306	sizeof(storePrivate->notifyFileIdentifier));
	307	if (written == -1) {
	308	if (errno == EWOULDBLOCK) {
	309	#ifdef DEBUG
9de8ab86	310	SC_log(LOG_DEBUG, "sorry, only one outstanding notification per session");
dbf6a266 A	311	#endif /* DEBUG */
	312	} else {
	313	#ifdef DEBUG
9de8ab86	314	SC_log(LOG_DEBUG, "could not send notification, write() failed: %s",
dbf6a266 A	315	strerror(errno));
	316	#endif /* DEBUG */
	317	storePrivate->notifyFile = -1;
	318	}
	319	} else if (written != sizeof(storePrivate->notifyFileIdentifier)) {
	320	#ifdef DEBUG
9de8ab86	321	SC_log(LOG_DEBUG, "could not send notification, incomplete write()");
dbf6a266 A	322	#endif /* DEBUG */
	323	storePrivate->notifyFile = -1;
	324	}
	325	}
	326
	327	if ((storePrivate->notifyStatus == Using_NotifierInformViaSignal) &&
	328	(storePrivate->notifySignal > 0)) {
	329	kern_return_t status;
	330	pid_t pid;
942cecd7 A	331
	332	/*
	333	* Associate notification activity with the client
	334	*/
	335	os_activity_scope(theSession->activity);
	336
dbf6a266 A	337	/*
	338	* Post notification as signal
	339	*/
	340	status = pid_for_task(storePrivate->notifySignalTask, &pid);
	341	if (status == KERN_SUCCESS) {
942cecd7	342	SC_trace("-->sig : %5d : pid = %d, signal = sig%s (%d)",
9de8ab86 A	343	storePrivate->server,
	344	pid,
	345	sys_signame[storePrivate->notifySignal],
	346	storePrivate->notifySignal);
a40a14f8	347
dbf6a266	348	if (kill(pid, storePrivate->notifySignal) != 0) {
a40a14f8	349	if (errno != ESRCH) {
9de8ab86 A	350	SC_log(LOG_NOTICE, "could not send sig%s to PID %d: %s",
	351	sys_signame[storePrivate->notifySignal],
	352	pid,
	353	strerror(errno));
a40a14f8	354	}
dbf6a266 A	355	}
	356	} else {
	357	mach_port_type_t pt;
	358
a40a14f8 A	359	__MACH_PORT_DEBUG(TRUE, "*** pushNotifications pid_for_task failed: releasing task", storePrivate->notifySignalTask);
	360	if (mach_port_type(mach_task_self(), storePrivate->notifySignalTask, &pt) == KERN_SUCCESS) {
	361	if ((pt & MACH_PORT_TYPE_DEAD_NAME) != 0) {
9de8ab86	362	SC_log(LOG_NOTICE, "pid_for_task() failed: %s", mach_error_string(status));
a40a14f8	363	}
dbf6a266	364	} else {
9de8ab86	365	SC_log(LOG_NOTICE, "mach_port_type() failed: %s", mach_error_string(status));
dbf6a266	366	}
dbf6a266	367
dbf6a266	368	/* don't bother with any more attempts */
a40a14f8	369	(void) mach_port_deallocate(mach_task_self(), storePrivate->notifySignalTask);
dbf6a266 A	370	storePrivate->notifySignal = 0;
	371	storePrivate->notifySignalTask = TASK_NULL;
	372	}
	373	}
	374	}
5e9ce69e	375	if (sessionsToNotify != sessionsToNotify_q) CFAllocatorDeallocate(NULL, sessionsToNotify);
dbf6a266 A	376
	377	/*
	378	* this list of notifications have been posted, wait for some more.
	379	*/
	380	CFRelease(needsNotification);
	381	needsNotification = NULL;
5958d7c0 A	382
	383	return;
	384	}