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Commit	Line	Data
	1	/*
	2	* Copyright (c) 2000, 2001, 2003, 2004, 2006, 2009 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 "configd.h"
	35	#include "configd_server.h"
	36	#include "session.h"
	37
	38
	39	__private_extern__
	40	int
	41	__SCDynamicStoreLock(SCDynamicStoreRef store, Boolean recursive)
	42	{
	43	serverSessionRef mySession;
	44	SCDynamicStorePrivateRef storePrivate = (SCDynamicStorePrivateRef)store;
	45
	46	if ((store == NULL) \|\| (storePrivate->server == MACH_PORT_NULL)) {
	47	return kSCStatusNoStoreSession; /* you must have an open session to play */
	48	}
	49
	50	if (storeLocked > 0) {
	51	if (storePrivate->locked && recursive) {
	52	/* if this session holds the lock and this is a recursive (internal) request */
	53	storeLocked++;
	54	return kSCStatusOK;
	55	}
	56	return kSCStatusLocked; /* sorry, someone (you) already have the lock */
	57	}
	58
	59	/* check credentials */
	60	mySession = getSession(storePrivate->server);
	61	if (!hasWriteAccess(mySession)) {
	62	return kSCStatusAccessError;
	63	}
	64
	65	if (!recursive && _configd_trace) {
	66	SCTrace(TRUE, _configd_trace, CFSTR("lock : %5d\n"), storePrivate->server);
	67	}
	68
	69	storeLocked = 1; /* global lock flag */
	70	storePrivate->locked = TRUE; /* per-session lock flag */
	71
	72	/*
	73	* defer all (actually, most) changes until the call to __SCDynamicStoreUnlock()
	74	*/
	75	if (storeData_s) {
	76	CFRelease(storeData_s);
	77	CFRelease(patternData_s);
	78	CFRelease(changedKeys_s);
	79	CFRelease(deferredRemovals_s);
	80	CFRelease(removedSessionKeys_s);
	81	}
	82	storeData_s = CFDictionaryCreateMutableCopy(NULL, 0, storeData);
	83	patternData_s = CFDictionaryCreateMutableCopy(NULL, 0, patternData);
	84	changedKeys_s = CFSetCreateMutableCopy(NULL, 0, changedKeys);
	85	deferredRemovals_s = CFSetCreateMutableCopy(NULL, 0, deferredRemovals);
	86	removedSessionKeys_s = CFSetCreateMutableCopy(NULL, 0, removedSessionKeys);
	87
	88	/* Add a "locked" mode run loop source for this port */
	89	CFRunLoopAddSource(CFRunLoopGetCurrent(), mySession->serverRunLoopSource, CFSTR("locked"));
	90
	91	return kSCStatusOK;
	92	}
	93
	94
	95	__private_extern__
	96	kern_return_t
	97	_configlock(mach_port_t server, int *sc_status)
	98	{
	99	serverSessionRef mySession = getSession(server);
	100
	101	if (mySession == NULL) {
	102	sc_status = kSCStatusNoStoreSession; / you must have an open session to play */
	103	return KERN_SUCCESS;
	104	}
	105
	106	*sc_status = __SCDynamicStoreLock(mySession->store, FALSE);
	107	if (*sc_status != kSCStatusOK) {
	108	return KERN_SUCCESS;
	109	}
	110
	111	return KERN_SUCCESS;
	112	}