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// Copyright 2021 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#import "Crashlytics/Crashlytics/Models/FIRCLSLaunchMarkerModel.h"
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#import "Crashlytics/Crashlytics/Helpers/FIRCLSInternalLogging.h"
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@interface FIRCLSLaunchMarkerModel ()
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@property(nonatomic, strong) FIRCLSFileManager *fileManager;
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@end
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@implementation FIRCLSLaunchMarkerModel
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- (instancetype)initWithFileManager:(FIRCLSFileManager *)fileManager {
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self = [super init];
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if (!self) {
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return nil;
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}
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_fileManager = fileManager;
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return self;
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}
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- (BOOL)checkForAndCreateLaunchMarker {
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BOOL launchFailure = [self launchFailureMarkerPresent];
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if (launchFailure) {
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FIRCLSDeveloperLog("Crashlytics:Crash",
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@"Last launch failed: this may indicate a crash shortly after app launch.");
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} else {
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[self createLaunchFailureMarker];
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}
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return launchFailure;
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}
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- (NSString *)launchFailureMarkerPath {
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return [[_fileManager structurePath] stringByAppendingPathComponent:@"launchmarker"];
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}
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- (BOOL)createLaunchFailureMarker {
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// It's tempting to use - [NSFileManger createFileAtPath:contents:attributes:] here. But that
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// operation, even with empty/nil contents does a ton of work to write out nothing via a
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// temporarly file. This is a much faster implemenation.
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const char *path = [[self launchFailureMarkerPath] fileSystemRepresentation];
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#if TARGET_OS_IPHONE
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/*
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* data-protected non-portable open(2) :
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* int open_dprotected_np(user_addr_t path, int flags, int class, int dpflags, int mode)
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*/
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int fd = open_dprotected_np(path, O_WRONLY | O_CREAT | O_TRUNC, 4, 0, 0644);
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#else
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int fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
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#endif
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if (fd == -1) {
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return NO;
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}
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return close(fd) == 0;
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}
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- (BOOL)launchFailureMarkerPresent {
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return [[_fileManager underlyingFileManager] fileExistsAtPath:[self launchFailureMarkerPath]];
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}
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- (BOOL)removeLaunchFailureMarker {
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return [_fileManager removeItemAtPath:[self launchFailureMarkerPath]];
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}
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@end
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