configd.tproj/_snapshot.c

   1 /*
   2  * Copyright (c) 2000-2006, 2009-2011, 2015 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                                 _SCUnserialize(&plist, data, NULL, 0);
  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         if (nElements > 0) {
 104                 CFIndex i;
 105
 106                 for (i = 0; i < nElements; i++) {
 107                         CFRelease(nValues[i]);
 108                 }
 109
 110                 if (keys != keys_q) {
 111                         CFAllocatorDeallocate(NULL, keys);
 112                         CFAllocatorDeallocate(NULL, oValues);
 113                         CFAllocatorDeallocate(NULL, nValues);
 114                 }
 115         }
 116
 117         return newStoreData;
 118 }
 119
 120
 121 __private_extern__
 122 int
 123 __SCDynamicStoreSnapshot(SCDynamicStoreRef store)
 124 {
 125         CFDictionaryRef                 expandedStoreData;
 126         FILE                            *f;
 127         int                             fd;
 128         CFDataRef                       xmlData;
 129
 130         /* Save a snapshot of configd's "state" */
 131
 132         (void) unlink(SNAPSHOT_PATH_STATE);
 133         fd = open(SNAPSHOT_PATH_STATE, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0644);
 134         if (fd == -1) {
 135                 return kSCStatusFailed;
 136         }
 137         f = fdopen(fd, "w");
 138         if (f == NULL) {
 139                 return kSCStatusFailed;
 140         }
 141         SCPrint(TRUE, f, CFSTR("Main thread :\n\n"));
 142         SCPrint(TRUE, f, CFSTR("%@\n"), CFRunLoopGetCurrent());
 143         if (plugin_runLoop != NULL) {
 144                 SCPrint(TRUE, f, CFSTR("Plug-in thread :\n\n"));
 145                 SCPrint(TRUE, f, CFSTR("%@\n"), plugin_runLoop);
 146         }
 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         /* Save a snapshot of the "session" data */
 189
 190         (void) unlink(SNAPSHOT_PATH_SESSION);
 191         fd = open(SNAPSHOT_PATH_SESSION, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0644);
 192         if (fd == -1) {
 193                 return kSCStatusFailed;
 194         }
 195
 196         xmlData = CFPropertyListCreateData(NULL, sessionData, kCFPropertyListXMLFormat_v1_0, 0, NULL);
 197         if (xmlData == NULL) {
 198                 SC_log(LOG_NOTICE, "CFPropertyListCreateData() failed");
 199                 close(fd);
 200                 return kSCStatusFailed;
 201         }
 202         (void) write(fd, CFDataGetBytePtr(xmlData), CFDataGetLength(xmlData));
 203         (void) close(fd);
 204         CFRelease(xmlData);
 205
 206         return kSCStatusOK;
 207 }
 208
 209
 210 __private_extern__
 211 kern_return_t
 212 _snapshot(mach_port_t server, int *sc_status, audit_token_t audit_token)
 213 {
 214         serverSessionRef        mySession;
 215
 216         mySession = getSession(server);
 217         if (mySession == NULL) {
 218                 mySession = tempSession(server, CFSTR("SCDynamicStoreSnapshot"), audit_token);
 219                 if (mySession == NULL) {
 220                         /* you must have an open session to play */
 221                         return kSCStatusNoStoreSession;
 222                 }
 223         }
 224
 225         if (!hasRootAccess(mySession)) {
 226                 return kSCStatusAccessError;
 227         }
 228
 229         *sc_status = __SCDynamicStoreSnapshot(mySession->store);
 230         return KERN_SUCCESS;
 231 }