SystemConfiguration.fproj/SCP.c

   1 /*
   2  * Copyright (c) 2000, 2001, 2003-2005, 2007-2009, 2011, 2014-2020 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__
  65 uint32_t
  66 __SCPreferencesGetNetworkConfigurationFlags(SCPreferencesRef prefs)
  67 {
  68         SCPreferencesPrivateRef prefsPrivate    = (SCPreferencesPrivateRef)prefs;
  69
  70         return (prefs != NULL) ? prefsPrivate->nc_flags : 0;
  71 }
  72
  73 __private_extern__
  74 void
  75 __SCPreferencesSetNetworkConfigurationFlags(SCPreferencesRef prefs, uint32_t nc_flags)
  76 {
  77         SCPreferencesPrivateRef prefsPrivate    = (SCPreferencesPrivateRef)prefs;
  78
  79         if (prefs != NULL) {
  80                 prefsPrivate->nc_flags = nc_flags;
  81         }
  82
  83         return;
  84 }
  85
  86
  87 __private_extern__ char *
  88 __SCPreferencesPath(CFAllocatorRef      allocator,
  89                     CFStringRef         prefsID,
  90                     Boolean             useNewPrefs)
  91 {
  92         CFStringRef     path            = NULL;
  93         char            *pathStr;
  94
  95         if (prefsID == NULL) {
  96                 /* default preference ID */
  97                 path = CFStringCreateWithFormat(allocator,
  98                                                 NULL,
  99                                                 CFSTR("%@/%@"),
 100                                                 useNewPrefs ? PREFS_DEFAULT_DIR    : PREFS_DEFAULT_DIR_OLD,
 101                                                 useNewPrefs ? PREFS_DEFAULT_CONFIG : PREFS_DEFAULT_CONFIG_OLD);
 102         } else if (CFStringHasPrefix(prefsID, CFSTR("/"))) {
 103                 /* if absolute path */
 104                 path = CFStringCreateCopy(allocator, prefsID);
 105         } else {
 106                 /* relative path */
 107                 path = CFStringCreateWithFormat(allocator,
 108                                                 NULL,
 109                                                 CFSTR("%@/%@"),
 110                                                 useNewPrefs ? PREFS_DEFAULT_DIR : PREFS_DEFAULT_DIR_OLD,
 111                                                 prefsID);
 112                 if (useNewPrefs && CFStringHasSuffix(path, CFSTR(".xml"))) {
 113                         CFMutableStringRef      newPath;
 114
 115                         newPath = CFStringCreateMutableCopy(allocator, 0, path);
 116                         CFStringReplace(newPath,
 117                                         CFRangeMake(CFStringGetLength(newPath)-4, 4),
 118                                         CFSTR(".plist"));
 119                         CFRelease(path);
 120                         path = newPath;
 121                 }
 122         }
 123
 124         /*
 125          * convert CFStringRef path to C-string path
 126          */
 127         pathStr = _SC_cfstring_to_cstring(path, NULL, 0, kCFStringEncodingASCII);
 128         if (pathStr == NULL) {
 129                 CFIndex pathLen;
 130
 131                 pathLen = CFStringGetMaximumSizeOfFileSystemRepresentation(path);
 132                 pathStr = CFAllocatorAllocate(NULL, pathLen, 0);
 133                 if (!CFStringGetFileSystemRepresentation(path, pathStr, pathLen)) {
 134                         SC_log(LOG_INFO, "could not convert path to C string");
 135                         CFAllocatorDeallocate(NULL, pathStr);
 136                         pathStr = NULL;
 137                 }
 138         }
 139
 140         CFRelease(path);
 141         return pathStr;
 142 }
 143
 144
 145 __private_extern__
 146 Boolean
 147 __SCPreferencesIsEmpty(SCPreferencesRef prefs)
 148 {
 149         SCPreferencesPrivateRef prefsPrivate    = (SCPreferencesPrivateRef)prefs;
 150
 151         assert(prefs != NULL);
 152         __SCPreferencesAccess(prefs);
 153
 154         if ((prefsPrivate->prefs == NULL) ||
 155             (CFDictionaryGetCount(prefsPrivate->prefs) == 0)) {
 156                 return TRUE;
 157         }
 158
 159         return FALSE;
 160 }
 161
 162
 163 __private_extern__
 164 off_t
 165 __SCPreferencesPrefsSize(SCPreferencesRef prefs)
 166 {
 167         SCPreferencesPrivateRef prefsPrivate    = (SCPreferencesPrivateRef)prefs;
 168         SCPSignatureDataRef     sig;
 169         CFDataRef               signature;
 170
 171         signature = prefsPrivate->signature;
 172         if (signature == NULL) {
 173                 return 0;
 174         }
 175
 176         sig = (SCPSignatureDataRef)(void *)CFDataGetBytePtr(signature);
 177         return sig->st_size;
 178 }
 179
 180
 181 __private_extern__
 182 Boolean
 183 __SCPreferencesUsingDefaultPrefs(SCPreferencesRef prefs)
 184 {
 185         char                    *curPath;
 186         Boolean                 isDefault = FALSE;
 187         SCPreferencesPrivateRef prefsPrivate = (SCPreferencesPrivateRef)prefs;
 188
 189         curPath = prefsPrivate->newPath ? prefsPrivate->newPath : prefsPrivate->path;
 190         if (curPath != NULL) {
 191                 char*   defPath;
 192
 193                 defPath = __SCPreferencesPath(NULL,
 194                                               NULL,
 195                                               (prefsPrivate->newPath == NULL));
 196                 if (defPath != NULL) {
 197                         if (strcmp(curPath, defPath) == 0) {
 198                                 isDefault = TRUE;
 199                         }
 200                         CFAllocatorDeallocate(NULL, defPath);
 201                 }
 202         }
 203         return isDefault;
 204 }
 205
 206 CFDataRef
 207 SCPreferencesGetSignature(SCPreferencesRef prefs)
 208 {
 209         SCPreferencesPrivateRef prefsPrivate    = (SCPreferencesPrivateRef)prefs;
 210
 211         if (prefs == NULL) {
 212                 /* sorry, you must provide a session */
 213                 _SCErrorSet(kSCStatusNoPrefsSession);
 214                 return NULL;
 215         }
 216
 217         __SCPreferencesAccess(prefs);
 218
 219         return prefsPrivate->signature;
 220 }
 221
 222
 223 __private_extern__ CF_RETURNS_RETAINED CFStringRef
 224 _SCPNotificationKey(CFAllocatorRef      allocator,
 225                     CFStringRef         prefsID,
 226                     int                 keyType)
 227 {
 228         CFStringRef     keyStr;
 229         char            *path;
 230         CFStringRef     pathStr;
 231         CFStringRef     storeKey;
 232
 233         switch (keyType) {
 234                 case kSCPreferencesKeyLock :
 235                         keyStr = CFSTR("lock");
 236                         break;
 237                 case kSCPreferencesKeyCommit :
 238                         keyStr = CFSTR("commit");
 239                         break;
 240                 case kSCPreferencesKeyApply :
 241                         keyStr = CFSTR("apply");
 242                         break;
 243                 default :
 244                         return NULL;
 245         }
 246
 247         path = __SCPreferencesPath(allocator, prefsID, TRUE);
 248         if (path == NULL) {
 249                 return NULL;
 250         }
 251
 252         pathStr = CFStringCreateWithCStringNoCopy(allocator,
 253                                                   path,
 254                                                   kCFStringEncodingASCII,
 255                                                   kCFAllocatorNull);
 256
 257         storeKey = CFStringCreateWithFormat(allocator,
 258                                             NULL,
 259                                             CFSTR("%@%@:%@"),
 260                                             kSCDynamicStoreDomainPrefs,
 261                                             keyStr,
 262                                             pathStr);
 263
 264         CFRelease(pathStr);
 265         CFAllocatorDeallocate(NULL, path);
 266         return storeKey;
 267 }
 268
 269
 270 CFStringRef
 271 SCDynamicStoreKeyCreatePreferences(CFAllocatorRef       allocator,
 272                                    CFStringRef          prefsID,
 273                                    SCPreferencesKeyType keyType)
 274 {
 275         return _SCPNotificationKey(allocator, prefsID, keyType);
 276 }
 277