keychain/ckksctl/ckksctl.m

   1 //
   2 //  Security
   3 //
   4
   5 #import <Foundation/Foundation.h>
   6 #import <Foundation/NSXPCConnection_Private.h>
   7 #import <Security/Security.h>
   8 #import <Security/SecItemPriv.h>
   9 #import <xpc/xpc.h>
  10 #import <err.h>
  11
  12 #import "keychain/ckks/CKKS.h"
  13 #import "keychain/ckks/CKKSControl.h"
  14
  15 #include "lib/SecArgParse.h"
  16
  17 static void nsprintf(NSString *fmt, ...) NS_FORMAT_FUNCTION(1, 2);
  18 static void print_result(NSDictionary *dict, bool json_flag);
  19 static void print_dict(NSDictionary *dict, int ind);
  20 static void print_array(NSArray *array, int ind);
  21 static void print_entry(id k, id v, int ind);
  22
  23 static void nsprintf(NSString *fmt, ...)
  24 {
  25     va_list ap;
  26     va_start(ap, fmt);
  27     NSString *str = [[NSString alloc] initWithFormat:fmt arguments:ap];
  28     va_end(ap);
  29
  30     puts([str UTF8String]);
  31 #if !__has_feature(objc_arc)
  32     [str release];
  33 #endif
  34 }
  35
  36 static NSDictionary* flattenNSErrorsInDictionary(NSDictionary* dict) {
  37     if(!dict) {
  38         return nil;
  39     }
  40     NSMutableDictionary* mutDict = [dict mutableCopy];
  41     for(id key in mutDict.allKeys) {
  42         id obj = mutDict[key];
  43         if([obj isKindOfClass:[NSError class]]) {
  44             NSError* obje = (NSError*) obj;
  45             NSMutableDictionary* newErrorDict = [@{@"code": @(obje.code), @"domain": obje.domain} mutableCopy];
  46             newErrorDict[@"userInfo"] = flattenNSErrorsInDictionary(obje.userInfo);
  47             mutDict[key] = newErrorDict;
  48         } else if(![NSJSONSerialization isValidJSONObject:obj]) {
  49             mutDict[key] = [obj description];
  50         }
  51     }
  52     return mutDict;
  53 }
  54
  55 static void print_result(NSDictionary *dict, bool json_flag)
  56 {
  57     if (json_flag) {
  58         NSError *err;
  59
  60         // NSErrors don't know how to JSON-ify themselves, for some reason
  61         // This will flatten a single layer of them
  62         if(![NSJSONSerialization isValidJSONObject:dict]) {
  63             dict = flattenNSErrorsInDictionary(dict);
  64         }
  65
  66         if(![NSJSONSerialization isValidJSONObject:dict]) {
  67             printf("Still unsure how to JSONify the following object:\n");
  68             print_dict(dict, 0);
  69         }
  70
  71         NSData *json = [NSJSONSerialization dataWithJSONObject:dict
  72                                                        options:(NSJSONWritingPrettyPrinted | NSJSONWritingSortedKeys)
  73                                                          error:&err];
  74         if (!json) {
  75             NSLog(@"error: %@", err.localizedDescription);
  76         } else {
  77             printf("%s", [[[NSString alloc] initWithData:json encoding:NSUTF8StringEncoding] UTF8String]);
  78         }
  79     } else {
  80         print_dict(dict, 0);
  81     }
  82 }
  83
  84 static void print_dict(NSDictionary *dict, int ind)
  85 {
  86     NSArray *sortedKeys = [[dict allKeys] sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
  87     for (id k in sortedKeys) {
  88         id v = dict[k];
  89         print_entry(k, v, ind);
  90     }
  91 }
  92
  93 static void print_array(NSArray *array, int ind)
  94 {
  95     [array enumerateObjectsUsingBlock:^(id v, NSUInteger i, BOOL *stop __unused) {
  96         print_entry(@(i), v, ind);
  97     }];
  98 }
  99
 100 static void print_entry(id k, id v, int ind)
 101 {
 102     if ([v isKindOfClass:[NSDictionary class]]) {
 103         if (ind == 0) {
 104             nsprintf(@"\n%*s%@ -", ind * 4, "", k);
 105             nsprintf(@"%*s========================", ind * 4, "");
 106         } else if (ind == 1) {
 107             nsprintf(@"\n%*s%@ -", ind * 4, "", k);
 108             nsprintf(@"%*s------------------------", ind * 4, "");
 109         } else {
 110             nsprintf(@"%*s%@ -", ind * 4, "", k);
 111         }
 112
 113         print_dict(v, ind + 1);
 114     } else if ([v isKindOfClass:[NSArray class]]) {
 115         nsprintf(@"%*s%@ -", ind * 4, "", k);
 116         print_array(v, ind + 1);
 117     } else {
 118         nsprintf(@"%*s%@: %@", ind * 4, "", k, v);
 119     }
 120 }
 121
 122 @interface CKKSControlCLI : NSObject
 123 @property CKKSControl* control;
 124 @end
 125
 126 @implementation CKKSControlCLI
 127
 128 - (instancetype) initWithCKKSControl:(CKKSControl*)control {
 129     if ((self = [super init])) {
 130         _control = control;
 131     }
 132
 133     return self;
 134 }
 135
 136 - (NSDictionary<NSString *, id> *)fetchPerformanceCounters
 137 {
 138     NSMutableDictionary *perfDict = [[NSMutableDictionary alloc] init];
 139 #if OCTAGON
 140     dispatch_semaphore_t sema = dispatch_semaphore_create(0);
 141
 142     [self.control rpcPerformanceCounters:^(NSDictionary<NSString *,NSNumber *> * counters, NSError * error) {
 143         if(error) {
 144             perfDict[@"error"] = [error description];
 145         }
 146
 147         [counters enumerateKeysAndObjectsUsingBlock:^(NSString * key, NSNumber * obj, BOOL *stop) {
 148             perfDict[key] = obj;
 149         }];
 150
 151         dispatch_semaphore_signal(sema);
 152     }];
 153
 154     if(dispatch_semaphore_wait(sema, dispatch_time(DISPATCH_TIME_NOW, NSEC_PER_SEC * 60)) != 0) {
 155         perfDict[@"error"] = @"timed out waiting for response";
 156     }
 157 #endif
 158
 159     return perfDict;
 160 }
 161
 162 - (long)resetLocal:(NSString*)view {
 163     __block long ret = 0;
 164 #if OCTAGON
 165     printf("Beginning local reset for %s...\n", view ? [[view description] UTF8String] : "all zones");
 166     dispatch_semaphore_t sema = dispatch_semaphore_create(0);
 167
 168     [self.control rpcResetLocal:view
 169                           reply:^(NSError *error) {
 170                               if(error == NULL) {
 171                                   printf("reset complete.\n");
 172                                   ret = 0;
 173                               } else {
 174                                   nsprintf(@"reset error: %@\n", error);
 175                                   ret = error.code;
 176                               }
 177                               dispatch_semaphore_signal(sema);
 178                           }];
 179
 180     if(dispatch_semaphore_wait(sema, dispatch_time(DISPATCH_TIME_NOW, NSEC_PER_SEC * 60 * 2)) != 0) {
 181         printf("\n\nError: timed out waiting for response\n");
 182         return -1;
 183     }
 184 #endif // OCTAGON
 185     return ret;
 186 }
 187
 188 - (long)resetCloudKit:(NSString*)view {
 189     __block long ret = 0;
 190 #if OCTAGON
 191     printf("Beginning CloudKit reset for %s...\n", view ? [[view description] UTF8String] : "all zones");
 192     dispatch_semaphore_t sema = dispatch_semaphore_create(0);
 193
 194     [self.control rpcResetCloudKit:view reason:@"ckksctl" reply:^(NSError* error){
 195         if(error == NULL) {
 196             printf("CloudKit Reset complete.\n");
 197             ret = 0;
 198         } else {
 199             nsprintf(@"Reset error: %@\n", error);
 200             ret = error.code;
 201         }
 202         dispatch_semaphore_signal(sema);
 203     }];
 204
 205     if(dispatch_semaphore_wait(sema, dispatch_time(DISPATCH_TIME_NOW, NSEC_PER_SEC * 60 * 5)) != 0) {
 206         printf("\n\nError: timed out waiting for response\n");
 207         return -1;
 208     }
 209 #endif // OCTAON
 210     return ret;
 211 }
 212
 213 - (long)resync:(NSString*)view {
 214     __block long ret = 0;
 215 #if OCTAGON
 216     printf("Beginning resync for %s...\n", view ? [[view description] UTF8String] : "all zones");
 217     dispatch_semaphore_t sema = dispatch_semaphore_create(0);
 218
 219     [self.control rpcResync:view reply:^(NSError* error){
 220         if(error == NULL) {
 221             printf("resync success.\n");
 222             ret = 0;
 223         } else {
 224             nsprintf(@"resync errored: %@\n", error);
 225             ret = error.code;
 226         }
 227         dispatch_semaphore_signal(sema);
 228     }];
 229
 230     if(dispatch_semaphore_wait(sema, dispatch_time(DISPATCH_TIME_NOW, NSEC_PER_SEC * 60 * 2)) != 0) {
 231         printf("\n\nError: timed out waiting for response\n");
 232         return -1;
 233     }
 234 #endif // OCTAGON
 235     return ret;
 236 }
 237
 238 - (NSDictionary<NSString *, id> *)fetchStatus: (NSString*) view {
 239     NSMutableDictionary *status = [[NSMutableDictionary alloc] init];
 240 #if OCTAGON
 241     dispatch_semaphore_t sema = dispatch_semaphore_create(0);
 242
 243     [self.control rpcStatus: view reply: ^(NSArray<NSDictionary*>* result, NSError* error) {
 244         if(error) {
 245             status[@"error"] = [error description];
 246         }
 247
 248         if(result.count <= 1u) {
 249             printf("No CKKS views are active.\n");
 250         }
 251
 252
 253         for(NSDictionary* viewStatus in result) {
 254             status[viewStatus[@"view"]] = viewStatus;
 255         }
 256         dispatch_semaphore_signal(sema);
 257     }];
 258
 259     if(dispatch_semaphore_wait(sema, dispatch_time(DISPATCH_TIME_NOW, NSEC_PER_SEC * 30)) != 0) {
 260         status[@"error"] = @"timed out";
 261     }
 262 #endif // OCTAGON
 263     return status;
 264 }
 265
 266 - (void)printHumanReadableStatus: (NSString*) view {
 267 #if OCTAGON
 268     dispatch_semaphore_t sema = dispatch_semaphore_create(0);
 269
 270     [self.control rpcStatus: view reply: ^(NSArray<NSDictionary*>* result, NSError* error) {
 271         if(error) {
 272             printf("ERROR FETCHING STATUS: %s\n", [[error description] UTF8String]);
 273         }
 274
 275 #define pop(d, key) ({ id x = d[key]; d[key] = nil; x; })
 276
 277         // First result is always global state
 278         // Ideally, this would come in another parameter, but we can't change the protocol until
 279         // <rdar://problem/33583242> CKKS: remove PCS's use of CKKSControlProtocol
 280         NSMutableDictionary* global = [result[0] mutableCopy];
 281         if(global) {
 282             NSString* selfPeers = pop(global, @"selfPeers");
 283             NSString* selfPeersError = pop(global, @"selfPeersError");
 284             NSArray* trustedPeers = pop(global, @"trustedPeers");
 285             NSString* trustedPeersError = pop(global, @"trustedPeersError");
 286             NSString* reachability = pop(global, @"reachability");
 287             NSString* ckdeviceID = pop(global, @"ckdeviceID");
 288             NSString* ckdeviceIDError = pop(global, @"ckdeviceIDError");
 289
 290             printf("================================================================================\n\n");
 291             printf("Global state:\n\n");
 292             printf("Current self:         %s\n", [[selfPeers description] UTF8String]);
 293             if(![selfPeersError isEqual: [NSNull null]]) {
 294                 printf("Self Peers Error:     %s\n", [[selfPeersError description] UTF8String]);
 295             }
 296             printf("Trusted peers:        %s\n", [[trustedPeers description] UTF8String]);
 297             if(![trustedPeersError isEqual: [NSNull null]]) {
 298                 printf("Trusted Peers Error:  %s\n", [[trustedPeersError description] UTF8String]);
 299             }
 300             printf("Reachability:         %s\n", [[reachability description] UTF8String]);
 301             printf("CK DeviceID:          %s\n", [[ckdeviceID description] UTF8String]);
 302             printf("CK DeviceID Error:    %s\n", [[ckdeviceIDError description] UTF8String]);
 303
 304             printf("\n");
 305         }
 306
 307         NSArray* remainingViews = result.count > 1 ? [result subarrayWithRange:NSMakeRange(1, result.count-1)] : @[];
 308
 309         if(remainingViews.count == 0u) {
 310             printf("No CKKS views are active.\n");
 311         }
 312
 313         for(NSDictionary* viewStatus in remainingViews) {
 314             NSMutableDictionary* status = [viewStatus mutableCopy];
 315
 316             NSString* viewName = pop(status,@"view");
 317             NSString* accountStatus = pop(status,@"ckaccountstatus");
 318             NSString* lockStateTracker = pop(status,@"lockstatetracker");
 319             NSString* accountTracker = pop(status,@"accounttracker");
 320             NSString* fetcher = pop(status,@"fetcher");
 321             NSString* zoneCreated = pop(status,@"zoneCreated");
 322             NSString* zoneCreatedError = pop(status,@"zoneCreatedError");
 323             NSString* zoneSubscribed = pop(status,@"zoneSubscribed");
 324             NSString* zoneSubscribedError = pop(status,@"zoneSubscribedError");
 325             NSString* zoneInitializeScheduler = pop(status,@"zoneInitializeScheduler");
 326             NSString* keystate = pop(status,@"keystate");
 327             NSString* keyStateError = pop(status,@"keyStateError");
 328             NSString* statusError = pop(status,@"statusError");
 329             NSString* currentTLK =    pop(status,@"currentTLK");
 330             NSString* currentClassA = pop(status,@"currentClassA");
 331             NSString* currentClassC = pop(status,@"currentClassC");
 332             NSString* currentTLKPtr =     pop(status,@"currentTLKPtr");
 333             NSString* currentClassAPtr = pop(status,@"currentClassAPtr");
 334             NSString* currentClassCPtr = pop(status,@"currentClassCPtr");
 335             NSString* currentManifestGeneration = pop(status,@"currentManifestGen");
 336
 337             NSDictionary* oqe = pop(status,@"oqe");
 338             NSDictionary* iqe = pop(status,@"iqe");
 339             NSDictionary* keys = pop(status,@"keys");
 340             NSDictionary* ckmirror = pop(status,@"ckmirror");
 341             NSArray* devicestates = pop(status, @"devicestates");
 342             NSArray* tlkshares = pop(status, @"tlkshares");
 343
 344
 345             NSString* zoneSetupOperation                  = pop(status,@"zoneSetupOperation");
 346             NSString* keyStateOperation                   = pop(status,@"keyStateOperation");
 347             NSString* lastIncomingQueueOperation          = pop(status,@"lastIncomingQueueOperation");
 348             NSString* lastNewTLKOperation                 = pop(status,@"lastNewTLKOperation");
 349             NSString* lastOutgoingQueueOperation          = pop(status,@"lastOutgoingQueueOperation");
 350             NSString* lastProcessReceivedKeysOperation    = pop(status,@"lastProcessReceivedKeysOperation");
 351             NSString* lastReencryptOutgoingItemsOperation = pop(status,@"lastReencryptOutgoingItemsOperation");
 352             NSString* lastScanLocalItemsOperation         = pop(status,@"lastScanLocalItemsOperation");
 353
 354             printf("================================================================================\n\n");
 355
 356             printf("View: %s\n\n", [viewName UTF8String]);
 357
 358             if(![statusError isEqual: [NSNull null]]) {
 359                 printf("ERROR FETCHING STATUS: %s\n\n", [statusError UTF8String]);
 360             }
 361
 362             printf("CloudKit account:     %s\n", [accountStatus UTF8String]);
 363             printf("Account tracker:      %s\n", [accountTracker UTF8String]);
 364
 365             if(!([zoneCreated isEqualToString:@"yes"] && [zoneSubscribed isEqualToString:@"yes"])) {
 366                 printf("CK Zone Created:            %s\n", [[zoneCreated description] UTF8String]);
 367                 printf("CK Zone Created error:      %s\n", [[zoneCreatedError description] UTF8String]);
 368
 369                 printf("CK Zone Subscribed:         %s\n", [[zoneSubscribed description] UTF8String]);
 370                 printf("CK Zone Subscription error: %s\n", [[zoneSubscribedError description] UTF8String]);
 371                 printf("CK Zone initialize retry:   %s\n", [[zoneInitializeScheduler description] UTF8String]);
 372                 printf("\n");
 373             }
 374
 375             printf("Key state:            %s\n", [keystate UTF8String]);
 376             if(![keyStateError isEqual: [NSNull null]]) {
 377                 printf("Key State Error: %s\n", [keyStateError UTF8String]);
 378             }
 379             printf("Lock state:           %s\n", [lockStateTracker UTF8String]);
 380
 381             printf("Current TLK:          %s\n", ![currentTLK    isEqual: [NSNull null]]
 382                    ? [currentTLK    UTF8String]
 383                    : [[NSString stringWithFormat:@"missing; pointer is %@", currentTLKPtr] UTF8String]);
 384             printf("Current ClassA:       %s\n", ![currentClassA isEqual: [NSNull null]]
 385                    ? [currentClassA UTF8String]
 386                    : [[NSString stringWithFormat:@"missing; pointer is %@", currentClassAPtr] UTF8String]);
 387             printf("Current ClassC:       %s\n", ![currentClassC isEqual: [NSNull null]]
 388                    ? [currentClassC UTF8String]
 389                    : [[NSString stringWithFormat:@"missing; pointer is %@", currentClassCPtr] UTF8String]);
 390
 391             printf("TLK shares:           %s\n", [[tlkshares description] UTF8String]);
 392
 393             printf("Outgoing Queue counts: %s\n", [[oqe description] UTF8String]);
 394             printf("Incoming Queue counts: %s\n", [[iqe description] UTF8String]);
 395             printf("Key counts: %s\n", [[keys description] UTF8String]);
 396             printf("latest manifest generation: %s\n", [currentManifestGeneration isEqual:[NSNull null]] ? "null" : currentManifestGeneration.UTF8String);
 397
 398             printf("Item counts (by key):  %s\n", [[ckmirror description] UTF8String]);
 399             printf("Peer states:           %s\n", [[devicestates description] UTF8String]);
 400
 401             printf("zone change fetcher:                 %s\n", [[fetcher description] UTF8String]);
 402             printf("zoneSetupOperation:                  %s\n", [zoneSetupOperation                  isEqual: [NSNull null]] ? "never" : [zoneSetupOperation                  UTF8String]);
 403             printf("keyStateOperation:                   %s\n", [keyStateOperation                   isEqual: [NSNull null]] ? "never" : [keyStateOperation                   UTF8String]);
 404             printf("lastIncomingQueueOperation:          %s\n", [lastIncomingQueueOperation          isEqual: [NSNull null]] ? "never" : [lastIncomingQueueOperation          UTF8String]);
 405             printf("lastNewTLKOperation:                 %s\n", [lastNewTLKOperation                 isEqual: [NSNull null]] ? "never" : [lastNewTLKOperation                 UTF8String]);
 406             printf("lastOutgoingQueueOperation:          %s\n", [lastOutgoingQueueOperation          isEqual: [NSNull null]] ? "never" : [lastOutgoingQueueOperation          UTF8String]);
 407             printf("lastProcessReceivedKeysOperation:    %s\n", [lastProcessReceivedKeysOperation    isEqual: [NSNull null]] ? "never" : [lastProcessReceivedKeysOperation    UTF8String]);
 408             printf("lastReencryptOutgoingItemsOperation: %s\n", [lastReencryptOutgoingItemsOperation isEqual: [NSNull null]] ? "never" : [lastReencryptOutgoingItemsOperation UTF8String]);
 409             printf("lastScanLocalItemsOperation:         %s\n", [lastScanLocalItemsOperation         isEqual: [NSNull null]] ? "never" : [lastScanLocalItemsOperation         UTF8String]);
 410
 411             if(status.allKeys.count > 0u) {
 412                 printf("\nExtra information: %s\n", [[status description] UTF8String]);
 413             }
 414             printf("\n");
 415         }
 416         dispatch_semaphore_signal(sema);
 417     }];
 418
 419     if(dispatch_semaphore_wait(sema, dispatch_time(DISPATCH_TIME_NOW, NSEC_PER_SEC * 30)) != 0) {
 420         printf("\n\nError: timed out waiting for response\n");
 421     }
 422 #endif // OCTAGON
 423 }
 424
 425 - (long)fetch:(NSString*)view {
 426     __block long ret = 0;
 427 #if OCTAGON
 428     dispatch_semaphore_t sema = dispatch_semaphore_create(0);
 429
 430     [self.control rpcFetchAndProcessChanges:view reply:^(NSError* error) {
 431         if(error) {
 432             printf("Error fetching: %s\n", [[error description] UTF8String]);
 433             ret = (error.code == 0 ? -1 : error.code);
 434         } else {
 435             printf("Complete.\n");
 436             ret = 0;
 437         }
 438
 439         dispatch_semaphore_signal(sema);
 440     }];
 441
 442     if(dispatch_semaphore_wait(sema, dispatch_time(DISPATCH_TIME_NOW, NSEC_PER_SEC * 65)) != 0) {
 443         printf("\n\nError: timed out waiting for response\n");
 444         return -1;
 445     }
 446 #endif // OCTAGON
 447     return ret;
 448 }
 449
 450 - (long)push:(NSString*)view {
 451     __block long ret = 0;
 452 #if OCTAGON
 453     dispatch_semaphore_t sema = dispatch_semaphore_create(0);
 454
 455     [self.control rpcPushOutgoingChanges:view reply:^(NSError* error) {
 456         if(error) {
 457             printf("Error pushing: %s\n", [[error description] UTF8String]);
 458             ret = (error.code == 0 ? -1 : error.code);
 459         } else {
 460             printf("Complete.\n");
 461             ret = 0;
 462         }
 463
 464         dispatch_semaphore_signal(sema);
 465     }];
 466
 467     if(dispatch_semaphore_wait(sema, dispatch_time(DISPATCH_TIME_NOW, NSEC_PER_SEC * 65)) != 0) {
 468         printf("\n\nError: timed out waiting for response\n");
 469         return -1;
 470     }
 471 #endif // OCTAGON
 472     return ret;
 473 }
 474
 475 @end
 476
 477
 478 static int perfCounters = false;
 479 static int status = false;
 480 static int resync = false;
 481 static int reset = false;
 482 static int resetCloudKit = false;
 483 static int fetch = false;
 484 static int push = false;
 485 static int json = false;
 486
 487 static char* viewArg = NULL;
 488
 489 int main(int argc, char **argv)
 490 {
 491     static struct argument options[] = {
 492         { .shortname='p', .longname="perfcounters", .flag=&perfCounters, .flagval=true, .description="Print CKKS performance counters"},
 493         { .shortname='j', .longname="json", .flag=&json, .flagval=true, .description="Output in JSON format"},
 494         { .shortname='v', .longname="view", .argument=&viewArg, .description="Operate on a single view"},
 495
 496         { .command="status", .flag=&status, .flagval=true, .description="Report status on CKKS views"},
 497         { .command="fetch", .flag=&fetch, .flagval=true, .description="Fetch all new changes in CloudKit and attempt to process them"},
 498         { .command="push", .flag=&push, .flagval=true, .description="Push all pending local changes to CloudKit"},
 499         { .command="resync", .flag=&resync, .flagval=true, .description="Resync all data with what's in CloudKit"},
 500         { .command="reset", .flag=&reset, .flagval=true, .description="All local data will be wiped, and data refetched from CloudKit"},
 501         { .command="reset-cloudkit", .flag=&resetCloudKit, .flagval=true, .description="All data in CloudKit will be removed and replaced with what's local"},
 502         {}
 503     };
 504
 505     static struct arguments args = {
 506         .programname="ckksctl",
 507         .description="Control and report on CKKS",
 508         .arguments = options,
 509     };
 510
 511     if(!options_parse(argc, argv, &args)) {
 512         printf("\n");
 513         print_usage(&args);
 514         return -1;
 515     }
 516
 517     @autoreleasepool {
 518         NSError* error = nil;
 519
 520         CKKSControl* rpc = [CKKSControl controlObject:&error];
 521         if(error || !rpc) {
 522             errx(1, "no CKKSControl failed: %s", [[error description] UTF8String]);
 523         }
 524
 525         CKKSControlCLI* ctl = [[CKKSControlCLI alloc] initWithCKKSControl:rpc];
 526
 527         NSString* view = viewArg ? [NSString stringWithCString: viewArg encoding: NSUTF8StringEncoding] : nil;
 528
 529         if(status) {
 530             // Complicated logic, but you can choose any combination of (json, perfcounters) that you like.
 531             NSMutableDictionary *statusDict = [[NSMutableDictionary alloc] init];
 532             if(perfCounters) {
 533                 statusDict[@"performance"] = [ctl fetchPerformanceCounters];
 534             }
 535             if (json) {
 536                 statusDict[@"status"] = [ctl fetchStatus:view];
 537             }
 538             if(json || perfCounters) {
 539                print_result(statusDict, true);
 540                 printf("\n");
 541             }
 542
 543             if(!json) {
 544                 [ctl printHumanReadableStatus:view];
 545             }
 546             return 0;
 547         } else if(perfCounters) {
 548             NSMutableDictionary *statusDict = [[NSMutableDictionary alloc] init];
 549             statusDict[@"performance"] = [ctl fetchPerformanceCounters];
 550             print_result(statusDict, false);
 551
 552         } else if(fetch) {
 553             return (int)[ctl fetch:view];
 554         } else if(push) {
 555             return (int)[ctl push:view];
 556         } else if(reset) {
 557             return (int)[ctl resetLocal:view];
 558         } else if(resetCloudKit) {
 559             return (int)[ctl resetCloudKit:view];
 560         } else if(resync) {
 561             return (int)[ctl resync:view];
 562         } else {
 563             print_usage(&args);
 564             return -1;
 565         }
 566     }
 567     return 0;
 568 }