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/* CFBundle_Main.c
Copyright (c) 1999-2019, Apple Inc. and the Swift project authors
Portions Copyright (c) 2014-2019, Apple Inc. and the Swift project authors
Licensed under Apache License v2.0 with Runtime Library Exception
See http://swift.org/LICENSE.txt for license information
See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
Responsibility: Tony Parker
*/
#include "CFBundle.h"
#include "CFBundle_Internal.h"
#if defined(BINARY_SUPPORT_DLFCN)
#include <dlfcn.h>
#ifndef RTLD_FIRST
#define RTLD_FIRST 0
#endif
#endif /* BINARY_SUPPORT_DLFCN */
static Boolean _initedMainBundle = false;
static CFBundleRef _mainBundle = NULL;
static char __CFBundleMainID__[1026] = {0};
char *__CFBundleMainID = __CFBundleMainID__;
static _CFMutex _mainBundleLock = _CF_MUTEX_STATIC_INITIALIZER;
#pragma mark -
static void _CFBundleInitializeMainBundleInfoDictionaryAlreadyLocked(CFStringRef executablePath) {
CFBundleGetInfoDictionary(_mainBundle);
if (!_mainBundle->_infoDict || CFDictionaryGetCount(_mainBundle->_infoDict) == 0) {
// if type 3 bundle and no Info.plist, treat as unbundled, since this gives too many false positives
if (_mainBundle->_version == _CFBundleVersionFlat) _mainBundle->_version = _CFBundleVersionNotABundle;
if (_mainBundle->_version == _CFBundleVersionOldStyleResources) {
// if type 0 bundle and no Info.plist and not main executable for bundle, treat as unbundled, since this gives too many false positives
CFStringRef executableName = _CFBundleCopyExecutableName(_mainBundle, NULL, NULL);
if (!executableName || !executablePath || !CFStringHasSuffix(executablePath, executableName)) _mainBundle->_version = _CFBundleVersionNotABundle;
if (executableName) CFRelease(executableName);
}
#if defined(BINARY_SUPPORT_DYLD)
// We can fall into this case when the executable is sandboxed enough that it can't read its own executable file. We can still attempt to get the info dictionary from the main executable though. _CFBundleCreateInfoDictFromMainExecutable will correctly handle a case where the section does not exist.
if (_mainBundle->_binaryType == __CFBundleDYLDExecutableBinary || _mainBundle->_binaryType == __CFBundleUnreadableBinary) {
if (_mainBundle->_infoDict) CFRelease(_mainBundle->_infoDict);
_mainBundle->_infoDict = (CFDictionaryRef)_CFBundleCreateInfoDictFromMainExecutable();
}
#endif /* BINARY_SUPPORT_DYLD */
} else {
#if defined(BINARY_SUPPORT_DYLD)
if (_mainBundle->_binaryType == __CFBundleDYLDExecutableBinary) {
// if dyld and not main executable for bundle, prefer info dictionary from executable
CFStringRef executableName = _CFBundleCopyExecutableName(_mainBundle, NULL, NULL);
if (!executableName || !executablePath || !CFStringHasSuffix(executablePath, executableName)) {
CFDictionaryRef infoDictFromExecutable = (CFDictionaryRef)_CFBundleCreateInfoDictFromMainExecutable();
if (infoDictFromExecutable && CFDictionaryGetCount(infoDictFromExecutable) > 0) {
if (_mainBundle->_infoDict) CFRelease(_mainBundle->_infoDict);
_mainBundle->_infoDict = infoDictFromExecutable;
} else if (infoDictFromExecutable) {
CFRelease(infoDictFromExecutable);
}
}
if (executableName) CFRelease(executableName);
}
#endif /* BINARY_SUPPORT_DYLD */
}
if (!_mainBundle->_infoDict) _mainBundle->_infoDict = CFDictionaryCreateMutable(kCFAllocatorSystemDefault, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
if (!_mainBundle->_executablePath && executablePath) _mainBundle->_executablePath = (CFStringRef)CFRetain(executablePath);
CFStringRef bundleID = (CFStringRef)CFDictionaryGetValue(_mainBundle->_infoDict, kCFBundleIdentifierKey);
if (bundleID) {
if (!CFStringGetCString(bundleID, __CFBundleMainID__, sizeof(__CFBundleMainID__) - 2, kCFStringEncodingUTF8)) {
__CFBundleMainID__[0] = '\0';
}
}
}
static CFBundleRef _CFBundleGetMainBundleAlreadyLocked(void) {
if (!_initedMainBundle) {
const char *processPath;
CFStringRef str = NULL;
CFURLRef executableURL = NULL, bundleURL = NULL;
_initedMainBundle = true;
processPath = _CFProcessPath();
if (processPath) {
str = CFStringCreateWithFileSystemRepresentation(kCFAllocatorSystemDefault, processPath);
if (!executableURL) executableURL = CFURLCreateWithFileSystemPath(kCFAllocatorSystemDefault, str, PLATFORM_PATH_STYLE, false);
}
if (executableURL) bundleURL = _CFBundleCopyBundleURLForExecutableURL(executableURL);
if (bundleURL) {
// make sure that main bundle has executable path
//??? what if we are not the main executable in the bundle?
// NB doFinalProcessing must be false here, see below
_mainBundle = _CFBundleCreateMain(kCFAllocatorSystemDefault, bundleURL);
if (_mainBundle) {
// make sure that the main bundle is listed as loaded, and mark it as executable
_mainBundle->_isLoaded = true;
#if defined(BINARY_SUPPORT_DYLD)
if (_mainBundle->_binaryType == __CFBundleUnknownBinary) {
if (!executableURL) {
_mainBundle->_binaryType = __CFBundleNoBinary;
} else {
_mainBundle->_binaryType = _CFBundleGrokBinaryType(executableURL);
if (_mainBundle->_binaryType != __CFBundleCFMBinary && _mainBundle->_binaryType != __CFBundleUnreadableBinary) _mainBundle->_resourceData._executableLacksResourceFork = true;
}
}
#endif /* BINARY_SUPPORT_DYLD */
// get cookie for already-loaded main bundle
#if defined(BINARY_SUPPORT_DLFCN)
if (!_mainBundle->_handleCookie) {
#if TARGET_OS_MAC
_mainBundle->_handleCookie = RTLD_MAIN_ONLY;
#else
_mainBundle->_handleCookie = dlopen(NULL, 0);
#endif
#if LOG_BUNDLE_LOAD
printf("main bundle %p getting handle %p\n", _mainBundle, _mainBundle->_handleCookie);
#endif /* LOG_BUNDLE_LOAD */
}
#elif defined(BINARY_SUPPORT_DYLD)
if (_mainBundle->_binaryType == __CFBundleDYLDExecutableBinary && !_mainBundle->_imageCookie) {
_mainBundle->_imageCookie = (void *)_dyld_get_image_header(0);
#if LOG_BUNDLE_LOAD
printf("main bundle %p getting image %p\n", _mainBundle, _mainBundle->_imageCookie);
#endif /* LOG_BUNDLE_LOAD */
}
#endif /* BINARY_SUPPORT_DLFCN */
_CFBundleInitializeMainBundleInfoDictionaryAlreadyLocked(str);
// Perform delayed final processing steps.
// This must be done after _isLoaded has been set, for security reasons (3624341).
// It is safe to unlock and re-lock here because we don't really do anything under the lock after we are done. It is just re-locked to satisfy the 'already locked' contract.
_CFMutexUnlock(&_mainBundleLock);
CFDictionaryRef infoDict = CFBundleGetInfoDictionary(_mainBundle);
// CFBundleInitPlugIn will return false if the factory ID already exists. For the main bundle, if that happens, we just continue on since we cannot just return NULL.
_CFBundleInitPlugIn(_mainBundle, infoDict, NULL);
_CFPlugInHandleDynamicRegistration(_mainBundle);
_CFMutexLock(&_mainBundleLock);
}
}
if (bundleURL) CFRelease(bundleURL);
if (str) CFRelease(str);
if (executableURL) CFRelease(executableURL);
}
return _mainBundle;
}
#pragma mark -
#pragma mark Exported Functions
CF_EXPORT CFURLRef _CFBundleCopyMainBundleExecutableURL(Boolean *looksLikeBundle) {
// This function is for internal use only; _mainBundle is deliberately accessed outside of the lock to get around a reentrancy issue
const char *processPath;
CFStringRef str = NULL;
CFURLRef executableURL = NULL;
processPath = _CFProcessPath();
if (processPath) {
str = CFStringCreateWithFileSystemRepresentation(kCFAllocatorSystemDefault, processPath);
if (str) {
executableURL = CFURLCreateWithFileSystemPath(kCFAllocatorSystemDefault, str, PLATFORM_PATH_STYLE, false);
CFRelease(str);
}
}
if (looksLikeBundle) {
CFBundleRef mainBundle = _mainBundle;
if (mainBundle && (_CFBundleVersionFlat == mainBundle->_version || _CFBundleVersionNotABundle == mainBundle->_version)) mainBundle = NULL;
*looksLikeBundle = (mainBundle ? true : false);
}
return executableURL;
}
CF_EXPORT CFBundleRef CFBundleGetMainBundle(void) {
CFBundleRef mainBundle;
_CFMutexLock(&_mainBundleLock);
mainBundle = _CFBundleGetMainBundleAlreadyLocked();
_CFMutexUnlock(&_mainBundleLock);
return mainBundle;
}
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