configd.tproj/_snapshot.c

   1 /*
   2  * Copyright (c) 2000-2006, 2009-2011, 2015, 2018, 2019 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  * 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 #include "plugin_support.h"
  42
  43
  44 #define SNAPSHOT_PATH_STATE     _PATH_VARTMP "configd-state"
  45 #define SNAPSHOT_PATH_STORE     _PATH_VARTMP "configd-store.plist"
  46 #define SNAPSHOT_PATH_PATTERN   _PATH_VARTMP "configd-pattern.plist"
  47
  48
  49 #define N_QUICK 100
  50
  51 static CF_RETURNS_RETAINED CFDictionaryRef
  52 _expandStore(CFDictionaryRef storeData)
  53 {
  54         const void *            keys_q[N_QUICK];
  55         const void **           keys            = keys_q;
  56         CFIndex                 nElements;
  57         CFDictionaryRef         newStoreData    = NULL;
  58         const void *            nValues_q[N_QUICK];
  59         const void **           nValues         = nValues_q;
  60         const void *            oValues_q[N_QUICK];
  61         const void **           oValues         = oValues_q;
  62
  63         nElements = CFDictionaryGetCount(storeData);
  64         if (nElements > 0) {
  65                 CFIndex i;
  66
  67                 if (nElements > (CFIndex)(sizeof(keys_q) / sizeof(CFTypeRef))) {
  68                         keys    = CFAllocatorAllocate(NULL, nElements * sizeof(CFTypeRef), 0);
  69                         oValues = CFAllocatorAllocate(NULL, nElements * sizeof(CFTypeRef), 0);
  70                         nValues = CFAllocatorAllocate(NULL, nElements * sizeof(CFTypeRef), 0);
  71                 }
  72                 memset(nValues, 0, nElements * sizeof(CFTypeRef));
  73
  74                 CFDictionaryGetKeysAndValues(storeData, keys, oValues);
  75                 for (i = 0; i < nElements; i++) {
  76                         CFDataRef               data;
  77
  78                         data = CFDictionaryGetValue(oValues[i], kSCDData);
  79                         if (data) {
  80                                 CFPropertyListRef       plist;
  81
  82                                 nValues[i] = CFDictionaryCreateMutableCopy(NULL, 0, oValues[i]);
  83
  84                                 if (!_SCUnserialize(&plist, data, NULL, 0)) {
  85                                         SC_log(LOG_NOTICE, "_SCUnserialize() failed, key=%@", keys[i]);
  86                                         continue;
  87                                 }
  88
  89                                 CFDictionarySetValue((CFMutableDictionaryRef)nValues[i],
  90                                                      kSCDData,
  91                                                      plist);
  92                                 CFRelease(plist);
  93                         } else {
  94                                 nValues[i] = CFRetain(oValues[i]);
  95                         }
  96                 }
  97         }
  98
  99         newStoreData = CFDictionaryCreate(NULL,
 100                                      keys,
 101                                      nValues,
 102                                      nElements,
 103                                      &kCFTypeDictionaryKeyCallBacks,
 104                                      &kCFTypeDictionaryValueCallBacks);
 105
 106         if (nElements > 0) {
 107                 CFIndex i;
 108
 109                 for (i = 0; i < nElements; i++) {
 110                         CFRelease(nValues[i]);
 111                 }
 112
 113                 if (keys != keys_q) {
 114                         CFAllocatorDeallocate(NULL, keys);
 115                         CFAllocatorDeallocate(NULL, oValues);
 116                         CFAllocatorDeallocate(NULL, nValues);
 117                 }
 118         }
 119
 120         return newStoreData;
 121 }
 122
 123
 124 __private_extern__
 125 int
 126 __SCDynamicStoreSnapshot(SCDynamicStoreRef store)
 127 {
 128 #pragma unused(store)
 129         CFDictionaryRef                 expandedStoreData;
 130         FILE                            *f;
 131         int                             fd;
 132         CFDataRef                       xmlData;
 133
 134         /* Save a snapshot of configd's "state" */
 135
 136         (void) unlink(SNAPSHOT_PATH_STATE);
 137         fd = open(SNAPSHOT_PATH_STATE, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0644);
 138         if (fd == -1) {
 139                 return kSCStatusFailed;
 140         }
 141         f = fdopen(fd, "w");
 142         if (f == NULL) {
 143                 return kSCStatusFailed;
 144         }
 145         SCPrint(TRUE, f, CFSTR("Main [plug-in] thread :\n\n"));
 146         SCPrint(TRUE, f, CFSTR("%@\n"), CFRunLoopGetCurrent());
 147         listSessions(f);
 148         (void) fclose(f);
 149
 150         /* Save a snapshot of the "store" data */
 151
 152         (void) unlink(SNAPSHOT_PATH_STORE);
 153         fd = open(SNAPSHOT_PATH_STORE, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0644);
 154         if (fd == -1) {
 155                 return kSCStatusFailed;
 156         }
 157
 158         expandedStoreData = _expandStore(storeData);
 159         xmlData = CFPropertyListCreateData(NULL, expandedStoreData, kCFPropertyListXMLFormat_v1_0, 0, NULL);
 160         CFRelease(expandedStoreData);
 161         if (xmlData == NULL) {
 162                 SC_log(LOG_NOTICE, "CFPropertyListCreateData() failed");
 163                 close(fd);
 164                 return kSCStatusFailed;
 165         }
 166         (void) write(fd, CFDataGetBytePtr(xmlData), CFDataGetLength(xmlData));
 167         (void) close(fd);
 168         CFRelease(xmlData);
 169
 170         /* Save a snapshot of the "pattern" data */
 171
 172         (void) unlink(SNAPSHOT_PATH_PATTERN);
 173         fd = open(SNAPSHOT_PATH_PATTERN, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0644);
 174         if (fd == -1) {
 175                 return kSCStatusFailed;
 176         }
 177
 178         xmlData = CFPropertyListCreateData(NULL, patternData, kCFPropertyListXMLFormat_v1_0, 0, NULL);
 179         if (xmlData == NULL) {
 180                 SC_log(LOG_NOTICE, "CFPropertyListCreateData() failed");
 181                 close(fd);
 182                 return kSCStatusFailed;
 183         }
 184         (void) write(fd, CFDataGetBytePtr(xmlData), CFDataGetLength(xmlData));
 185         (void) close(fd);
 186         CFRelease(xmlData);
 187
 188         return kSCStatusOK;
 189 }
 190
 191
 192 __private_extern__
 193 kern_return_t
 194 _snapshot(mach_port_t server, int *sc_status, audit_token_t audit_token)
 195 {
 196         serverSessionRef        mySession;
 197
 198         mySession = getSession(server);
 199         if (mySession == NULL) {
 200                 mySession = tempSession(server, CFSTR("SCDynamicStoreSnapshot"), audit_token);
 201                 if (mySession == NULL) {
 202                         /* you must have an open session to play */
 203                         return kSCStatusNoStoreSession;
 204                 }
 205         }
 206
 207         if (!hasRootAccess(mySession)) {
 208                 return kSCStatusAccessError;
 209         }
 210
 211         *sc_status = __SCDynamicStoreSnapshot(mySession->store);
 212         return KERN_SUCCESS;
 213 }