SystemConfiguration.fproj/SCP.c

   1 /*
   2  * Copyright (c) 2000, 2001, 2003-2005, 2007-2009, 2011, 2014-2018 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  * November 9, 2000             Allan Nathanson <ajn@apple.com>
  31  * - initial revision
  32  */
  33
  34 #include "SCPreferencesInternal.h"
  35 #include "SCNetworkConfigurationInternal.h"
  36
  37 #include <fcntl.h>
  38 #include <pwd.h>
  39 #include <unistd.h>
  40 #include <sys/errno.h>
  41 #include <sys/param.h>
  42
  43 __private_extern__ CF_RETURNS_RETAINED CFDataRef
  44 __SCPSignatureFromStatbuf(const struct stat *statBuf)
  45 {
  46         CFMutableDataRef        signature;
  47         SCPSignatureDataRef     sig;
  48
  49         signature = CFDataCreateMutable(NULL, sizeof(SCPSignatureData));
  50         CFDataSetLength(signature, sizeof(SCPSignatureData));
  51
  52         /* ALIGN: CFDataGetBytePtr aligns to at least 8 bytes */
  53         sig = (SCPSignatureDataRef)(void *)CFDataGetBytePtr(signature);
  54
  55         sig->st_dev       = statBuf->st_dev;
  56         sig->st_ino       = statBuf->st_ino;
  57         sig->tv_sec       = statBuf->st_mtimespec.tv_sec;
  58         sig->tv_nsec      = statBuf->st_mtimespec.tv_nsec;
  59         sig->st_size      = statBuf->st_size;
  60         return signature;
  61 }
  62
  63
  64 __private_extern__ char *
  65 __SCPreferencesPath(CFAllocatorRef      allocator,
  66                     CFStringRef         prefsID,
  67                     Boolean             useNewPrefs)
  68 {
  69         CFStringRef     path            = NULL;
  70         char            *pathStr;
  71
  72         if (prefsID == NULL) {
  73                 /* default preference ID */
  74                 path = CFStringCreateWithFormat(allocator,
  75                                                 NULL,
  76                                                 CFSTR("%@/%@"),
  77                                                 useNewPrefs ? PREFS_DEFAULT_DIR    : PREFS_DEFAULT_DIR_OLD,
  78                                                 useNewPrefs ? PREFS_DEFAULT_CONFIG : PREFS_DEFAULT_CONFIG_OLD);
  79         } else if (CFStringHasPrefix(prefsID, CFSTR("/"))) {
  80                 /* if absolute path */
  81                 path = CFStringCreateCopy(allocator, prefsID);
  82         } else {
  83                 /* relative path */
  84                 path = CFStringCreateWithFormat(allocator,
  85                                                 NULL,
  86                                                 CFSTR("%@/%@"),
  87                                                 useNewPrefs ? PREFS_DEFAULT_DIR : PREFS_DEFAULT_DIR_OLD,
  88                                                 prefsID);
  89                 if (useNewPrefs && CFStringHasSuffix(path, CFSTR(".xml"))) {
  90                         CFMutableStringRef      newPath;
  91
  92                         newPath = CFStringCreateMutableCopy(allocator, 0, path);
  93                         CFStringReplace(newPath,
  94                                         CFRangeMake(CFStringGetLength(newPath)-4, 4),
  95                                         CFSTR(".plist"));
  96                         CFRelease(path);
  97                         path = newPath;
  98                 }
  99         }
 100
 101         /*
 102          * convert CFStringRef path to C-string path
 103          */
 104         pathStr = _SC_cfstring_to_cstring(path, NULL, 0, kCFStringEncodingASCII);
 105         if (pathStr == NULL) {
 106                 CFIndex pathLen;
 107
 108                 pathLen = CFStringGetMaximumSizeOfFileSystemRepresentation(path);
 109                 pathStr = CFAllocatorAllocate(NULL, pathLen, 0);
 110                 if (!CFStringGetFileSystemRepresentation(path, pathStr, pathLen)) {
 111                         SC_log(LOG_INFO, "could not convert path to C string");
 112                         CFAllocatorDeallocate(NULL, pathStr);
 113                         pathStr = NULL;
 114                 }
 115         }
 116
 117         CFRelease(path);
 118         return pathStr;
 119 }
 120
 121
 122 __private_extern__
 123 Boolean
 124 __SCPreferencesGetLimitSCNetworkConfiguration(SCPreferencesRef prefs)
 125 {
 126         SCPreferencesPrivateRef prefsPrivate    = (SCPreferencesPrivateRef)prefs;
 127
 128         if (prefs == NULL) {
 129                 return FALSE;
 130         }
 131         return prefsPrivate->limit_SCNetworkConfiguration;
 132 }
 133
 134
 135 __private_extern__
 136 off_t
 137 __SCPreferencesPrefsSize(SCPreferencesRef prefs)
 138 {
 139         SCPreferencesPrivateRef prefsPrivate    = (SCPreferencesPrivateRef)prefs;
 140         SCPSignatureDataRef     sig;
 141         CFDataRef               signature;
 142
 143         signature = prefsPrivate->signature;
 144         if (signature == NULL) {
 145                 return 0;
 146         }
 147
 148         sig = (SCPSignatureDataRef)(void *)CFDataGetBytePtr(signature);
 149         return sig->st_size;
 150 }
 151
 152
 153 __private_extern__
 154 Boolean
 155 __SCPreferencesUsingDefaultPrefs(SCPreferencesRef prefs)
 156 {
 157         char                    *curPath;
 158         Boolean                 isDefault = FALSE;
 159         SCPreferencesPrivateRef prefsPrivate = (SCPreferencesPrivateRef)prefs;
 160
 161         curPath = prefsPrivate->newPath ? prefsPrivate->newPath : prefsPrivate->path;
 162         if (curPath != NULL) {
 163                 char*   defPath;
 164
 165                 defPath = __SCPreferencesPath(NULL,
 166                                               NULL,
 167                                               (prefsPrivate->newPath == NULL));
 168                 if (defPath != NULL) {
 169                         if (strcmp(curPath, defPath) == 0) {
 170                                 isDefault = TRUE;
 171                         }
 172                         CFAllocatorDeallocate(NULL, defPath);
 173                 }
 174         }
 175         return isDefault;
 176 }
 177
 178 __private_extern__
 179 SCPreferencesRef
 180 __SCPreferencesCreateNIPrefsFromPrefs(SCPreferencesRef prefs)
 181 {
 182         CFMutableStringRef newPath = NULL;
 183         CFURLRef newURL = NULL;
 184         SCPreferencesRef ni_prefs = NULL;
 185         SCPreferencesPrivateRef prefsPrivate = (SCPreferencesPrivateRef)prefs;
 186         char * prefsPath = __SCPreferencesPath(NULL, prefsPrivate->prefsID, FALSE);
 187
 188
 189         newPath = CFStringCreateMutable(NULL, 0);
 190         CFStringAppendFormat(newPath, NULL, CFSTR("%s"), prefsPath);
 191
 192         CFStringFindAndReplace(newPath,
 193                                PREFS_DEFAULT_CONFIG,
 194                                NETWORK_INTERFACES_PREFS,
 195                                CFRangeMake(0, CFStringGetLength(newPath)),
 196                                kCFCompareBackwards);
 197
 198         newURL = CFURLCreateWithFileSystemPath(NULL, newPath, kCFURLPOSIXPathStyle, FALSE);
 199         if (!CFURLResourceIsReachable(newURL, NULL)) {
 200                 ni_prefs = __SCNetworkCreateDefaultNIPrefs(newPath);
 201         } else {
 202                 ni_prefs = SCPreferencesCreate(NULL, prefsPrivate->name, newPath);
 203         }
 204         CFAllocatorDeallocate(NULL, prefsPath);
 205         CFRelease(newPath);
 206         CFRelease(newURL);
 207
 208         return ni_prefs;
 209 }
 210
 211 CFDataRef
 212 SCPreferencesGetSignature(SCPreferencesRef prefs)
 213 {
 214         SCPreferencesPrivateRef prefsPrivate    = (SCPreferencesPrivateRef)prefs;
 215
 216         if (prefs == NULL) {
 217                 /* sorry, you must provide a session */
 218                 _SCErrorSet(kSCStatusNoPrefsSession);
 219                 return NULL;
 220         }
 221
 222         __SCPreferencesAccess(prefs);
 223
 224         return prefsPrivate->signature;
 225 }
 226
 227
 228 __private_extern__ CF_RETURNS_RETAINED CFStringRef
 229 _SCPNotificationKey(CFAllocatorRef      allocator,
 230                     CFStringRef         prefsID,
 231                     int                 keyType)
 232 {
 233         CFStringRef     keyStr;
 234         char            *path;
 235         CFStringRef     pathStr;
 236         CFStringRef     storeKey;
 237
 238         switch (keyType) {
 239                 case kSCPreferencesKeyLock :
 240                         keyStr = CFSTR("lock");
 241                         break;
 242                 case kSCPreferencesKeyCommit :
 243                         keyStr = CFSTR("commit");
 244                         break;
 245                 case kSCPreferencesKeyApply :
 246                         keyStr = CFSTR("apply");
 247                         break;
 248                 default :
 249                         return NULL;
 250         }
 251
 252         path = __SCPreferencesPath(allocator, prefsID, TRUE);
 253         if (path == NULL) {
 254                 return NULL;
 255         }
 256
 257         pathStr = CFStringCreateWithCStringNoCopy(allocator,
 258                                                   path,
 259                                                   kCFStringEncodingASCII,
 260                                                   kCFAllocatorNull);
 261
 262         storeKey = CFStringCreateWithFormat(allocator,
 263                                             NULL,
 264                                             CFSTR("%@%@:%@"),
 265                                             kSCDynamicStoreDomainPrefs,
 266                                             keyStr,
 267                                             pathStr);
 268
 269         CFRelease(pathStr);
 270         CFAllocatorDeallocate(NULL, path);
 271         return storeKey;
 272 }
 273
 274
 275 CFStringRef
 276 SCDynamicStoreKeyCreatePreferences(CFAllocatorRef       allocator,
 277                                    CFStringRef          prefsID,
 278                                    SCPreferencesKeyType keyType)
 279 {
 280         return _SCPNotificationKey(allocator, prefsID, keyType);
 281 }
 282
 283
 284 __private_extern__ void
 285 __SCPreferencesSetLimitSCNetworkConfiguration(SCPreferencesRef  prefs,
 286                                               Boolean           limit_SCNetworkConfiguration)
 287 {
 288         SCPreferencesPrivateRef prefsPrivate    = (SCPreferencesPrivateRef)prefs;
 289
 290         if (prefs == NULL) {
 291                 return;
 292         }
 293         prefsPrivate->limit_SCNetworkConfiguration = limit_SCNetworkConfiguration;
 294 }