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Cider Isn't Darwin Emulation, Really
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C
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157/* * Copyright (c) 2000, 2001, 2004-2010, 2013, 2015, 2016, 2018 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 * * November 9, 2000 Allan Nathanson <ajn@apple.com> * - initial revision */
#include "SCPreferencesInternal.h"#include "SCHelper_client.h"
#include <unistd.h>#include <pthread.h>
static Boolean__SCPreferencesUnlock_helper(SCPreferencesRef prefs){ Boolean ok; SCPreferencesPrivateRef prefsPrivate = (SCPreferencesPrivateRef)prefs; uint32_t status = kSCStatusOK;
if (prefsPrivate->helper_port == MACH_PORT_NULL) { // if no helper goto fail; }
// have the helper "unlock" the prefs// status = kSCStatusOK; ok = _SCHelperExec(prefsPrivate->helper_port, SCHELPER_MSG_PREFS_UNLOCK, NULL, &status, NULL); if (!ok) { goto fail; }
if (status != kSCStatusOK) { goto error; }
__SCPreferencesUpdateLockedState(prefs, FALSE); return TRUE;
fail :
// close helper if (prefsPrivate->helper_port != MACH_PORT_NULL) { _SCHelperClose(&prefsPrivate->helper_port); }
status = kSCStatusAccessError;
error :
// return error _SCErrorSet(status); return FALSE;}
static voidreportDelay(SCPreferencesRef prefs, struct timeval *delay){ SCPreferencesPrivateRef prefsPrivate = (SCPreferencesPrivateRef)prefs;
SC_log(LOG_ERR, "SCPreferences(%@:%@) lock held for %d.%3.3d seconds", prefsPrivate->name, prefsPrivate->prefsID, (int)delay->tv_sec, delay->tv_usec / 1000); return;}
BooleanSCPreferencesUnlock(SCPreferencesRef prefs){ struct timeval lockElapsed; struct timeval lockEnd; SCPreferencesPrivateRef prefsPrivate = (SCPreferencesPrivateRef)prefs;
if (prefs == NULL) { /* sorry, you must provide a session */ _SCErrorSet(kSCStatusNoPrefsSession); return FALSE; }
if (!prefsPrivate->locked) { /* sorry, you don't have the lock */ _SCErrorSet(kSCStatusNeedLock); return FALSE; }
if (prefsPrivate->authorizationData != NULL) { return __SCPreferencesUnlock_helper(prefs); }
pthread_mutex_lock(&prefsPrivate->lock);
if (prefsPrivate->sessionNoO_EXLOCK != NULL) { // Note: closing the session removes the temporary "lock" key CFRelease(prefsPrivate->sessionNoO_EXLOCK); prefsPrivate->sessionNoO_EXLOCK = NULL; }
if (prefsPrivate->lockFD != -1) { if (prefsPrivate->lockPath != NULL) { unlink(prefsPrivate->lockPath); } close(prefsPrivate->lockFD); prefsPrivate->lockFD = -1; }
(void)gettimeofday(&lockEnd, NULL); timersub(&lockEnd, &prefsPrivate->lockTime, &lockElapsed); if (lockElapsed.tv_sec > 0) { // if we held the lock for more than 1 second reportDelay(prefs, &lockElapsed); }
SC_log(LOG_DEBUG, "SCPreferences() unlock: %s", prefsPrivate->newPath ? prefsPrivate->newPath : prefsPrivate->path);
__SCPreferencesUpdateLockedState(prefs, FALSE);
pthread_mutex_unlock(&prefsPrivate->lock); return TRUE;}