scselect.tproj/scselect.c

   1 /*
   2  * Copyright (c) 2000-2009, 2011, 2012, 2014, 2015, 2018, 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  * January 15, 2004             Allan Nathanson <ajn@apple.com>
  28  * - limit location changes to "root" (uid==0), users who are
  29  *   a member of group "admin", and processses which have access
  30  *   to a local graphics console.
  31  *
  32  * June 1, 2001                 Allan Nathanson <ajn@apple.com>
  33  * - public API conversion
  34  *
  35  * January 1, 2001              Allan Nathanson <ajn@apple.com>
  36  * - initial revision
  37  */
  38
  39 #include <getopt.h>
  40 #include <unistd.h>
  41 #include <sysexits.h>
  42 #include <sys/param.h>
  43 #include <sys/types.h>
  44 #include <sys/stat.h>
  45 #include <dlfcn.h>
  46 #include <grp.h>
  47
  48 #include <SystemConfiguration/SystemConfiguration.h>
  49 #include <SystemConfiguration/SCPrivate.h>
  50
  51 #if     !TARGET_OS_IPHONE
  52 #include <Security/Authorization.h>
  53 #endif  /* !TARGET_OS_IPHONE */
  54
  55
  56 static Boolean  apply   = TRUE;
  57
  58
  59 static const struct option longopts[] = {
  60 //      { "debug",              no_argument,            0,      'd' },
  61 //      { "verbose",            no_argument,            0,      'v' },
  62 //      { "do-not-apply",       no_argument,            0,      'n' },
  63         { "help",               no_argument,            0,      '?' },
  64         { 0,                    0,                      0,      0 }
  65 };
  66
  67
  68 static void
  69 usage(const char *command)
  70 {
  71         SCPrint(TRUE, stderr, CFSTR("usage: %s [-n] new-set-name\n"), command);
  72         exit (EX_USAGE);
  73 }
  74
  75
  76 int
  77 main(int argc, char **argv)
  78 {
  79         const char              *command        = argv[0];
  80         extern int              optind;
  81         int                     opt;
  82         CFStringRef             current         = NULL;
  83         int                     currentMatched  = 0;
  84         CFStringRef             newSet          = NULL; /* set key */
  85         CFStringRef             newSetUDN       = NULL; /* user defined name */
  86         CFStringRef             prefix;
  87         SCPreferencesRef        prefs;
  88         CFDictionaryRef         sets;
  89         CFIndex                 nSets;
  90         const void              **setKeys       = NULL;
  91         const void              **setVals       = NULL;
  92         CFIndex                 i;
  93
  94 #if     !TARGET_OS_IPHONE
  95         AuthorizationRef        authorization   = NULL;
  96         AuthorizationFlags      flags           = kAuthorizationFlagDefaults;
  97         CFMutableDictionaryRef  options;
  98         OSStatus                status;
  99 #endif  // !TARGET_OS_IPHONE
 100
 101         /* process any arguments */
 102
 103         while ((opt = getopt_long(argc, argv, "dvn", longopts, NULL)) != -1) {
 104                 switch(opt) {
 105                         case 'd':
 106                                 _sc_debug = TRUE;
 107                                 _sc_log   = kSCLogDestinationFile;      /* enable framework logging */
 108                                 break;
 109                         case 'v':
 110                                 _sc_verbose = TRUE;
 111                                 break;
 112                         case 'n':
 113                                 apply = FALSE;
 114                                 break;
 115                         case '?':
 116                         default :
 117                                 usage(command);
 118                 }
 119         }
 120         argc -= optind;
 121         argv += optind;
 122
 123         prefix = CFStringCreateWithFormat(NULL, NULL, CFSTR("/%@/"), kSCPrefSets);
 124
 125         if (argc == 1) {
 126                 newSet = CFStringCreateWithCString(NULL, argv[0], kCFStringEncodingMacRoman);
 127
 128                 /* check if a full path to the new "set" was specified */
 129                 if ((CFStringGetLength(newSet) > 0) && CFStringHasPrefix(newSet, prefix)) {
 130                         CFRange                 range;
 131                         CFMutableStringRef      str;
 132
 133                         str = CFStringCreateMutableCopy(NULL, 0, newSet);
 134                         CFRelease(newSet);
 135
 136                         CFStringDelete(str, CFRangeMake(0, CFStringGetLength(prefix)));
 137                         newSet = CFStringCreateCopy(NULL, str);
 138                         CFRelease(str);
 139
 140                         range = CFStringFind(newSet, CFSTR("/"), 0);
 141                         if (range.location != kCFNotFound) {
 142                                 SCPrint(TRUE, stderr, CFSTR("Set \"%@\" not available\n"), newSet);
 143                                 exit (1);
 144                         }
 145                 }
 146         } else {
 147                 newSet = CFRetain(CFSTR(""));
 148         }
 149
 150 #if     !TARGET_OS_IPHONE
 151         status = AuthorizationCreate(NULL,
 152                                      kAuthorizationEmptyEnvironment,
 153                                      flags,
 154                                      &authorization);
 155         if (status != errAuthorizationSuccess) {
 156                 SCPrint(TRUE,
 157                         stderr,
 158                         CFSTR("AuthorizationCreate() failed: status = %d\n"),
 159                         (int)status);
 160                 exit (1);
 161         }
 162
 163         options = CFDictionaryCreateMutable(NULL,
 164                                             0,
 165                                             &kCFTypeDictionaryKeyCallBacks,
 166                                             &kCFTypeDictionaryValueCallBacks);
 167         CFDictionarySetValue(options, kSCPreferencesOptionChangeNetworkSet, kCFBooleanTrue);
 168         prefs = SCPreferencesCreateWithOptions(NULL, CFSTR("scselect"), NULL, authorization, options);
 169         CFRelease(options);
 170         if (prefs == NULL) {
 171                 SCPrint(TRUE, stderr, CFSTR("SCPreferencesCreate() failed\n"));
 172                 exit (1);
 173         }
 174 #else   // !TARGET_OS_IPHONE
 175         prefs = SCPreferencesCreate(NULL, CFSTR("scselect"), NULL);
 176         if (prefs == NULL) {
 177                 SCPrint(TRUE, stderr, CFSTR("SCPreferencesCreate() failed\n"));
 178                 exit (1);
 179         }
 180 #endif  // !TARGET_OS_IPHONE
 181
 182         sets = SCPreferencesGetValue(prefs, kSCPrefSets);
 183         if (sets == NULL) {
 184                 SCPrint(TRUE, stderr, CFSTR("No network sets defined.\n"));
 185                 exit (1);
 186         }
 187
 188         current = SCPreferencesGetValue(prefs, kSCPrefCurrentSet);
 189         if (current != NULL) {
 190                 if (CFStringHasPrefix(current, prefix)) {
 191                         CFMutableStringRef      tmp;
 192
 193                         tmp = CFStringCreateMutableCopy(NULL, 0, current);
 194                         CFStringDelete(tmp, CFRangeMake(0, CFStringGetLength(prefix)));
 195                         current = tmp;
 196                 } else {
 197                         CFRetain(current);
 198                         currentMatched = -1;    /* not prefixed */
 199                 }
 200         } else {
 201                 current = CFRetain(CFSTR(""));
 202                 currentMatched = -2;    /* not defined */
 203         }
 204
 205         nSets = CFDictionaryGetCount(sets);
 206         if (nSets > 0) {
 207                 setKeys = CFAllocatorAllocate(NULL, nSets * sizeof(CFStringRef), 0);
 208                 setVals = CFAllocatorAllocate(NULL, nSets * sizeof(CFDictionaryRef), 0);
 209                 CFDictionaryGetKeysAndValues(sets, setKeys, setVals);
 210         }
 211
 212         /* check for set with matching name */
 213         for (i = 0; i < nSets; i++) {
 214                 CFStringRef     key  = (CFStringRef)    setKeys[i];
 215                 CFDictionaryRef dict = (CFDictionaryRef)setVals[i];
 216
 217                 if ((currentMatched >= 0) && CFEqual(key, current)) {
 218                         currentMatched++;
 219                 }
 220
 221                 if (CFEqual(newSet, key)) {
 222                         newSetUDN = CFDictionaryGetValue(dict, kSCPropUserDefinedName);
 223                         if (newSetUDN != NULL) CFRetain(newSetUDN);
 224                         goto found;
 225                 }
 226         }
 227
 228         /* check for set with matching user-defined name */
 229         for (i = 0; i < nSets; i++) {
 230                 CFStringRef     key  = (CFStringRef)    setKeys[i];
 231                 CFDictionaryRef dict = (CFDictionaryRef)setVals[i];
 232
 233                 newSetUDN = CFDictionaryGetValue(dict, kSCPropUserDefinedName);
 234                 if ((newSetUDN != NULL) && CFEqual(newSet, newSetUDN)) {
 235                         CFRelease(newSet);
 236                         newSet = CFRetain(key);
 237                         CFRetain(newSetUDN);
 238                         goto found;
 239                 }
 240         }
 241
 242         if (argc == 1) {
 243                 SCPrint(TRUE, stderr, CFSTR("Set \"%@\" not available.\n"), newSet);
 244                 exit(1);
 245         }
 246
 247         SCPrint(TRUE, stdout,
 248                 CFSTR("Defined sets include:%s\n"),
 249                 (currentMatched > 0) ? " (* == current set)" : "");
 250
 251         for (i = 0; i < nSets; i++) {
 252                 CFStringRef     key  = (CFStringRef)    setKeys[i];
 253                 CFDictionaryRef dict = (CFDictionaryRef)setVals[i];
 254                 CFStringRef     udn  = CFDictionaryGetValue(dict, kSCPropUserDefinedName);
 255
 256                 SCPrint(TRUE, stdout,
 257                         CFSTR(" %s %@\t(%@)\n"),
 258                         ((currentMatched > 0) && CFEqual(key, current)) ? "*" : " ",
 259                         key,
 260                         udn ? udn : CFSTR(""));
 261         }
 262
 263         switch (currentMatched) {
 264                 case -2 :
 265                         SCPrint(TRUE, stdout, CFSTR("\nCurrent set not defined.\n"));
 266                         break;
 267                 case -1 :
 268                         SCPrint(TRUE, stdout, CFSTR("\nCurrent set \"%@\" may not be valid\n"), current);
 269                         break;
 270                 case  0 :
 271                         SCPrint(TRUE, stdout, CFSTR("\nCurrent set \"%@\" not valid\n"), current);
 272                         break;
 273                 default :
 274                         break;
 275         }
 276
 277         CFRelease(prefix);
 278         exit (0);
 279
 280     found :
 281
 282         CFRelease(current);
 283         current = CFStringCreateWithFormat(NULL, NULL, CFSTR("%@%@"), prefix, newSet);
 284
 285         SCPreferencesSetValue(prefs, kSCPrefCurrentSet, current);
 286
 287         if (!SCPreferencesCommitChanges(prefs)) {
 288                 int     sc_status       = SCError();
 289
 290                 if (sc_status == kSCStatusAccessError) {
 291                         SCPrint(TRUE, stderr,
 292                                 CFSTR("Only local console users and administrators can change locations\n"));
 293                         exit (EX_NOPERM);
 294                 } else {
 295                         SCPrint(TRUE, stderr,
 296                                 CFSTR("SCPreferencesCommitChanges() failed: %s\n"),
 297                                 SCErrorString(sc_status));
 298                         exit (1);
 299                 }
 300         }
 301
 302         if (apply) {
 303                 if (!SCPreferencesApplyChanges(prefs)) {
 304                         SCPrint(TRUE, stderr,
 305                                 CFSTR("SCPreferencesApplyChanges() failed %s\n"),
 306                                 SCErrorString(SCError()));
 307                         exit (1);
 308                 }
 309         }
 310
 311         SCPrint(TRUE, stdout,
 312                 CFSTR("%@ updated to %@ (%@)\n"),
 313                 kSCPrefCurrentSet,
 314                 newSet,
 315                 newSetUDN ? newSetUDN : CFSTR(""));
 316
 317         CFRelease(current);
 318         CFRelease(newSet);
 319         if (newSetUDN != NULL)  CFRelease(newSetUDN);
 320         CFRelease(prefix);
 321         CFRelease(prefs);
 322
 323 #if     !TARGET_OS_IPHONE
 324         AuthorizationFree(authorization, kAuthorizationFlagDefaults);
 325 //      AuthorizationFree(authorization, kAuthorizationFlagDestroyRights);
 326 #endif  /* !TARGET_OS_IPHONE */
 327
 328         exit (0);
 329         return 0;
 330 }