configd.tproj/_snapshot.c

   1 /*
   2  * Copyright (c) 2000-2006, 2009-2011, 2015, 2017 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 #define SNAPSHOT_PATH_SESSION   _PATH_VARTMP "configd-session.plist"
  48
  49
  50 #define N_QUICK 100
  51
  52 static CF_RETURNS_RETAINED CFDictionaryRef
  53 _expandStore(CFDictionaryRef storeData)
  54 {
  55         const void *            keys_q[N_QUICK];
  56         const void **           keys            = keys_q;
  57         CFIndex                 nElements;
  58         CFDictionaryRef         newStoreData    = NULL;
  59         const void *            nValues_q[N_QUICK];
  60         const void **           nValues         = nValues_q;
  61         const void *            oValues_q[N_QUICK];
  62         const void **           oValues         = oValues_q;
  63
  64         nElements = CFDictionaryGetCount(storeData);
  65         if (nElements > 0) {
  66                 CFIndex i;
  67
  68                 if (nElements > (CFIndex)(sizeof(keys_q) / sizeof(CFTypeRef))) {
  69                         keys    = CFAllocatorAllocate(NULL, nElements * sizeof(CFTypeRef), 0);
  70                         oValues = CFAllocatorAllocate(NULL, nElements * sizeof(CFTypeRef), 0);
  71                         nValues = CFAllocatorAllocate(NULL, nElements * sizeof(CFTypeRef), 0);
  72                 }
  73                 bzero(nValues, nElements * sizeof(CFTypeRef));
  74
  75                 CFDictionaryGetKeysAndValues(storeData, keys, oValues);
  76                 for (i = 0; i < nElements; i++) {
  77                         CFDataRef               data;
  78
  79                         data = CFDictionaryGetValue(oValues[i], kSCDData);
  80                         if (data) {
  81                                 CFPropertyListRef       plist;
  82
  83                                 nValues[i] = CFDictionaryCreateMutableCopy(NULL, 0, oValues[i]);
  84
  85                                 if (!_SCUnserialize(&plist, data, NULL, 0)) {
  86                                         SC_log(LOG_NOTICE, "_SCUnserialize() failed, key=%@", keys[i]);
  87                                         continue;
  88                                 }
  89
  90                                 CFDictionarySetValue((CFMutableDictionaryRef)nValues[i],
  91                                                      kSCDData,
  92                                                      plist);
  93                                 CFRelease(plist);
  94                         } else {
  95                                 nValues[i] = CFRetain(oValues[i]);
  96                         }
  97                 }
  98         }
  99
 100         newStoreData = CFDictionaryCreate(NULL,
 101                                      keys,
 102                                      nValues,
 103                                      nElements,
 104                                      &kCFTypeDictionaryKeyCallBacks,
 105                                      &kCFTypeDictionaryValueCallBacks);
 106
 107         if (nElements > 0) {
 108                 CFIndex i;
 109
 110                 for (i = 0; i < nElements; i++) {
 111                         CFRelease(nValues[i]);
 112                 }
 113
 114                 if (keys != keys_q) {
 115                         CFAllocatorDeallocate(NULL, keys);
 116                         CFAllocatorDeallocate(NULL, oValues);
 117                         CFAllocatorDeallocate(NULL, nValues);
 118                 }
 119         }
 120
 121         return newStoreData;
 122 }
 123
 124
 125 __private_extern__
 126 int
 127 __SCDynamicStoreSnapshot(SCDynamicStoreRef store)
 128 {
 129 #pragma unused(store)
 130         CFDictionaryRef                 expandedStoreData;
 131         FILE                            *f;
 132         int                             fd;
 133         CFDataRef                       xmlData;
 134
 135         /* Save a snapshot of configd's "state" */
 136
 137         (void) unlink(SNAPSHOT_PATH_STATE);
 138         fd = open(SNAPSHOT_PATH_STATE, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0644);
 139         if (fd == -1) {
 140                 return kSCStatusFailed;
 141         }
 142         f = fdopen(fd, "w");
 143         if (f == NULL) {
 144                 return kSCStatusFailed;
 145         }
 146         SCPrint(TRUE, f, CFSTR("Main thread :\n\n"));
 147         SCPrint(TRUE, f, CFSTR("%@\n"), CFRunLoopGetCurrent());
 148         if (plugin_runLoop != NULL) {
 149                 SCPrint(TRUE, f, CFSTR("Plug-in thread :\n\n"));
 150                 SCPrint(TRUE, f, CFSTR("%@\n"), plugin_runLoop);
 151         }
 152         listSessions(f);
 153         (void) fclose(f);
 154
 155         /* Save a snapshot of the "store" data */
 156
 157         (void) unlink(SNAPSHOT_PATH_STORE);
 158         fd = open(SNAPSHOT_PATH_STORE, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0644);
 159         if (fd == -1) {
 160                 return kSCStatusFailed;
 161         }
 162
 163         expandedStoreData = _expandStore(storeData);
 164         xmlData = CFPropertyListCreateData(NULL, expandedStoreData, kCFPropertyListXMLFormat_v1_0, 0, NULL);
 165         CFRelease(expandedStoreData);
 166         if (xmlData == NULL) {
 167                 SC_log(LOG_NOTICE, "CFPropertyListCreateData() failed");
 168                 close(fd);
 169                 return kSCStatusFailed;
 170         }
 171         (void) write(fd, CFDataGetBytePtr(xmlData), CFDataGetLength(xmlData));
 172         (void) close(fd);
 173         CFRelease(xmlData);
 174
 175         /* Save a snapshot of the "pattern" data */
 176
 177         (void) unlink(SNAPSHOT_PATH_PATTERN);
 178         fd = open(SNAPSHOT_PATH_PATTERN, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0644);
 179         if (fd == -1) {
 180                 return kSCStatusFailed;
 181         }
 182
 183         xmlData = CFPropertyListCreateData(NULL, patternData, kCFPropertyListXMLFormat_v1_0, 0, NULL);
 184         if (xmlData == NULL) {
 185                 SC_log(LOG_NOTICE, "CFPropertyListCreateData() failed");
 186                 close(fd);
 187                 return kSCStatusFailed;
 188         }
 189         (void) write(fd, CFDataGetBytePtr(xmlData), CFDataGetLength(xmlData));
 190         (void) close(fd);
 191         CFRelease(xmlData);
 192
 193         /* Save a snapshot of the "session" data */
 194
 195         (void) unlink(SNAPSHOT_PATH_SESSION);
 196         fd = open(SNAPSHOT_PATH_SESSION, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0644);
 197         if (fd == -1) {
 198                 return kSCStatusFailed;
 199         }
 200
 201         xmlData = CFPropertyListCreateData(NULL, sessionData, kCFPropertyListXMLFormat_v1_0, 0, NULL);
 202         if (xmlData == NULL) {
 203                 SC_log(LOG_NOTICE, "CFPropertyListCreateData() failed");
 204                 close(fd);
 205                 return kSCStatusFailed;
 206         }
 207         (void) write(fd, CFDataGetBytePtr(xmlData), CFDataGetLength(xmlData));
 208         (void) close(fd);
 209         CFRelease(xmlData);
 210
 211         return kSCStatusOK;
 212 }
 213
 214
 215 __private_extern__
 216 kern_return_t
 217 _snapshot(mach_port_t server, int *sc_status, audit_token_t audit_token)
 218 {
 219         serverSessionRef        mySession;
 220
 221         mySession = getSession(server);
 222         if (mySession == NULL) {
 223                 mySession = tempSession(server, CFSTR("SCDynamicStoreSnapshot"), audit_token);
 224                 if (mySession == NULL) {
 225                         /* you must have an open session to play */
 226                         return kSCStatusNoStoreSession;
 227                 }
 228         }
 229
 230         if (!hasRootAccess(mySession)) {
 231                 return kSCStatusAccessError;
 232         }
 233
 234         *sc_status = __SCDynamicStoreSnapshot(mySession->store);
 235         return KERN_SUCCESS;
 236 }