configd.tproj/_snapshot.c

   1 /*
   2  * Copyright (c) 2000-2003 Apple Computer, 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  * April 14, 2000               Allan Nathanson <ajn@apple.com>
  31  * - initial revision
  32  */
  33
  34 #include <fcntl.h>
  35 #include <paths.h>
  36 #include <unistd.h>
  37
  38 #include "configd.h"
  39 #include "configd_server.h"
  40 #include "session.h"
  41
  42
  43 #define SNAPSHOT_PATH_STORE     _PATH_VARTMP "configd-store.xml"
  44 #define SNAPSHOT_PATH_PATTERN   _PATH_VARTMP "configd-pattern.xml"
  45 #define SNAPSHOT_PATH_SESSION   _PATH_VARTMP "configd-session.xml"
  46
  47
  48 #define N_QUICK 100
  49
  50 static CFDictionaryRef
  51 _expandStore(CFDictionaryRef storeData)
  52 {
  53         const void *            keys_q[N_QUICK];
  54         const void **           keys            = keys_q;
  55         CFIndex                 nElements;
  56         CFDictionaryRef         newStoreData    = NULL;
  57         const void *            nValues_q[N_QUICK];
  58         const void **           nValues         = nValues_q;
  59         const void *            oValues_q[N_QUICK];
  60         const void **           oValues         = oValues_q;
  61
  62         nElements = CFDictionaryGetCount(storeData);
  63         if (nElements > 0) {
  64                 CFIndex i;
  65
  66                 if (nElements > (CFIndex)(sizeof(keys_q) / sizeof(CFTypeRef))) {
  67                         keys    = CFAllocatorAllocate(NULL, nElements * sizeof(CFTypeRef), 0);
  68                         oValues = CFAllocatorAllocate(NULL, nElements * sizeof(CFTypeRef), 0);
  69                         nValues = CFAllocatorAllocate(NULL, nElements * sizeof(CFTypeRef), 0);
  70                 }
  71                 bzero(nValues, nElements * sizeof(CFTypeRef));
  72
  73                 CFDictionaryGetKeysAndValues(storeData, keys, oValues);
  74                 for (i = 0; i < nElements; i++) {
  75                         CFDataRef               data;
  76
  77                         data = CFDictionaryGetValue(oValues[i], kSCDData);
  78                         if (data) {
  79                                 CFPropertyListRef       plist;
  80
  81                                 if (!_SCUnserialize(&plist, data, NULL, NULL)) {
  82                                         goto done;
  83                                 }
  84
  85                                 nValues[i] = CFDictionaryCreateMutableCopy(NULL, 0, oValues[i]);
  86                                 CFDictionarySetValue((CFMutableDictionaryRef)nValues[i],
  87                                                      kSCDData,
  88                                                      plist);
  89                                 CFRelease(plist);
  90                         } else {
  91                                 nValues[i] = CFRetain(oValues[i]);
  92                         }
  93                 }
  94         }
  95
  96         newStoreData = CFDictionaryCreate(NULL,
  97                                      keys,
  98                                      nValues,
  99                                      nElements,
 100                                      &kCFTypeDictionaryKeyCallBacks,
 101                                      &kCFTypeDictionaryValueCallBacks);
 102
 103     done :
 104
 105         if (nElements > 0) {
 106                 CFIndex i;
 107
 108                 for (i = 0; i < nElements; i++) {
 109                         if (nValues[i]) CFRelease(nValues[i]);
 110                 }
 111
 112                 if (keys != keys_q) {
 113                         CFAllocatorDeallocate(NULL, keys);
 114                         CFAllocatorDeallocate(NULL, oValues);
 115                         CFAllocatorDeallocate(NULL, nValues);
 116                 }
 117         }
 118
 119         return newStoreData;
 120 }
 121
 122
 123 __private_extern__
 124 int
 125 __SCDynamicStoreSnapshot(SCDynamicStoreRef store)
 126 {
 127         CFDictionaryRef                 expandedStoreData;
 128         int                             fd;
 129         serverSessionRef                mySession;
 130         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)store;
 131         CFDataRef                       xmlData;
 132
 133         SCLog(_configd_verbose, LOG_DEBUG, CFSTR("__SCDynamicStoreSnapshot:"));
 134
 135         /* check credentials */
 136
 137         mySession = getSession(storePrivate->server);
 138         if (mySession->callerEUID != 0) {
 139                 return kSCStatusAccessError;
 140         }
 141
 142         /* Save a snapshot of the "store" data */
 143
 144         (void) unlink(SNAPSHOT_PATH_STORE);
 145         fd = open(SNAPSHOT_PATH_STORE, O_WRONLY|O_CREAT|O_TRUNC, 0644);
 146         if (fd < 0) {
 147                 return kSCStatusFailed;
 148         }
 149
 150         expandedStoreData = _expandStore(storeData);
 151         xmlData = CFPropertyListCreateXMLData(NULL, expandedStoreData);
 152         CFRelease(expandedStoreData);
 153         if (!xmlData) {
 154                 SCLog(TRUE, LOG_ERR, CFSTR("CFPropertyListCreateXMLData() failed"));
 155                 close(fd);
 156                 return kSCStatusFailed;
 157         }
 158         (void) write(fd, CFDataGetBytePtr(xmlData), CFDataGetLength(xmlData));
 159         (void) close(fd);
 160         CFRelease(xmlData);
 161
 162         /* Save a snapshot of the "pattern" data */
 163
 164         (void) unlink(SNAPSHOT_PATH_PATTERN);
 165         fd = open(SNAPSHOT_PATH_PATTERN, O_WRONLY|O_CREAT|O_TRUNC, 0644);
 166         if (fd < 0) {
 167                 return kSCStatusFailed;
 168         }
 169
 170         xmlData = CFPropertyListCreateXMLData(NULL, patternData);
 171         if (!xmlData) {
 172                 SCLog(TRUE, LOG_ERR, CFSTR("CFPropertyListCreateXMLData() failed"));
 173                 close(fd);
 174                 return kSCStatusFailed;
 175         }
 176         (void) write(fd, CFDataGetBytePtr(xmlData), CFDataGetLength(xmlData));
 177         (void) close(fd);
 178         CFRelease(xmlData);
 179
 180         /* Save a snapshot of the "session" data */
 181
 182         (void) unlink(SNAPSHOT_PATH_SESSION);
 183         fd = open(SNAPSHOT_PATH_SESSION, O_WRONLY|O_CREAT|O_TRUNC, 0644);
 184         if (fd < 0) {
 185                 return kSCStatusFailed;
 186         }
 187
 188         xmlData = CFPropertyListCreateXMLData(NULL, sessionData);
 189         if (!xmlData) {
 190                 SCLog(TRUE, LOG_ERR, CFSTR("CFPropertyListCreateXMLData() failed"));
 191                 close(fd);
 192                 return kSCStatusFailed;
 193         }
 194         (void) write(fd, CFDataGetBytePtr(xmlData), CFDataGetLength(xmlData));
 195         (void) close(fd);
 196         CFRelease(xmlData);
 197
 198         return kSCStatusOK;
 199 }
 200
 201
 202 __private_extern__
 203 kern_return_t
 204 _snapshot(mach_port_t server, int *sc_status)
 205 {
 206         serverSessionRef        mySession = getSession(server);
 207
 208         SCLog(_configd_verbose, LOG_DEBUG, CFSTR("Snapshot configuration database."));
 209
 210         if (!mySession) {
 211                 *sc_status = kSCStatusNoStoreSession;   /* you must have an open session to play */
 212                 return KERN_SUCCESS;
 213         }
 214
 215         *sc_status = __SCDynamicStoreSnapshot(mySession->store);
 216         if (*sc_status != kSCStatusOK) {
 217                 SCLog(_configd_verbose, LOG_DEBUG, CFSTR("  __SCDynamicStoreSnapshot(): %s"), SCErrorString(*sc_status));
 218         }
 219
 220         return KERN_SUCCESS;
 221 }