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CFPlatform.c
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/* CFPlatform.c
Copyright (c) 1999-2018, Apple Inc. and the Swift project authors
Portions Copyright (c) 2014-2018, 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 "CFInternal.h"
#include <CoreFoundation/CFPriv.h>
#if TARGET_OS_MAC
#include <stdlib.h>
#include <sys/stat.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <pwd.h>
#include <crt_externs.h>
#include <mach-o/dyld.h>
#endif
#if TARGET_OS_WIN32
#include <shellapi.h>
#include <shlobj.h>
#include <WinIoCtl.h>
#include <direct.h>
#include <process.h>
#define SECURITY_WIN32
#include <Security.h>
#define getcwd _NS_getcwd
#endif
#if TARGET_OS_MAC || TARGET_OS_WIN32
#define kCFPlatformInterfaceStringEncoding kCFStringEncodingUTF8
#else
#define kCFPlatformInterfaceStringEncoding CFStringGetSystemEncoding()
#endif
extern void __CFGetUGIDs(uid_t *euid, gid_t *egid);
#if TARGET_OS_MAC
// CoreGraphics and LaunchServices are only projects (1 Dec 2006) that use these
char **_CFArgv(void) { return *_NSGetArgv(); }
int _CFArgc(void) { return *_NSGetArgc(); }
#endif
CF_PRIVATE Boolean _CFGetCurrentDirectory(char *path, int maxlen) {
return getcwd(path, maxlen) != NULL;
}
#if TARGET_OS_WIN32
// Returns the path to the CF DLL, which we can then use to find resources like char sets
bool bDllPathCached = false;
CF_PRIVATE const wchar_t *_CFDLLPath(void) {
static wchar_t cachedPath[MAX_PATH+1];
if (!bDllPathCached) {
#ifdef _DEBUG
// might be nice to get this from the project file at some point
wchar_t *DLLFileName = L"CoreFoundation_debug.dll";
#else
wchar_t *DLLFileName = L"CoreFoundation.dll";
#endif
HMODULE ourModule = GetModuleHandleW(DLLFileName);
CFAssert(ourModule, __kCFLogAssertion, "GetModuleHandle failed");
DWORD wResult = GetModuleFileNameW(ourModule, cachedPath, MAX_PATH+1);
CFAssert1(wResult > 0, __kCFLogAssertion, "GetModuleFileName failed: %d", GetLastError());
CFAssert1(wResult < MAX_PATH+1, __kCFLogAssertion, "GetModuleFileName result truncated: %s", cachedPath);
// strip off last component, the DLL name
CFIndex idx;
for (idx = wResult - 1; idx; idx--) {
if ('\\' == cachedPath[idx]) {
cachedPath[idx] = '\0';
break;
}
}
bDllPathCached = true;
}
return cachedPath;
}
#endif
static const char *__CFProcessPath = NULL;
static const char *__CFprogname = NULL;
const char **_CFGetProgname(void) {
if (!__CFprogname)
_CFProcessPath(); // sets up __CFprogname as a side-effect
return &__CFprogname;
}
const char **_CFGetProcessPath(void) {
if (!__CFProcessPath)
_CFProcessPath(); // sets up __CFProcessPath as a side-effect
return &__CFProcessPath;
}
#if TARGET_OS_WIN32
const char *_CFProcessPath(void) {
if (__CFProcessPath) return __CFProcessPath;
wchar_t buf[CFMaxPathSize] = {0};
DWORD rlen = GetModuleFileNameW(NULL, buf, sizeof(buf) / sizeof(buf[0]));
if (0 < rlen) {
char asciiBuf[CFMaxPathSize] = {0};
int res = WideCharToMultiByte(CP_UTF8, 0, buf, rlen, asciiBuf, sizeof(asciiBuf) / sizeof(asciiBuf[0]), NULL, NULL);
if (0 < res) {
__CFProcessPath = strdup(asciiBuf);
__CFprogname = strrchr(__CFProcessPath, PATH_SEP);
__CFprogname = (__CFprogname ? __CFprogname + 1 : __CFProcessPath);
}
}
if (!__CFProcessPath) {
__CFProcessPath = "";
__CFprogname = __CFProcessPath;
}
return __CFProcessPath;
}
#endif
#if TARGET_OS_MAC || TARGET_OS_WIN32
CF_CROSS_PLATFORM_EXPORT Boolean _CFIsMainThread(void) {
return pthread_main_np() == 1;
}
#endif
#if TARGET_OS_MAC
const char *_CFProcessPath(void) {
if (__CFProcessPath) return __CFProcessPath;
#if TARGET_OS_OSX
if (!__CFProcessIsRestricted()) {
const char *path = (char *)__CFgetenv("CFProcessPath");
if (path) {
__CFProcessPath = strdup(path);
__CFprogname = strrchr(__CFProcessPath, PATH_SEP);
__CFprogname = (__CFprogname ? __CFprogname + 1 : __CFProcessPath);
return __CFProcessPath;
}
}
#endif
uint32_t size = CFMaxPathSize;
char buffer[size];
if (0 == _NSGetExecutablePath(buffer, &size)) {
__CFProcessPath = strdup(buffer);
__CFprogname = strrchr(__CFProcessPath, PATH_SEP);
__CFprogname = (__CFprogname ? __CFprogname + 1 : __CFProcessPath);
}
if (!__CFProcessPath) {
__CFProcessPath = "";
__CFprogname = __CFProcessPath;
}
return __CFProcessPath;
}
#endif
#if TARGET_OS_LINUX
#include <unistd.h>
#if __has_include(<syscall.h>)
#include <syscall.h>
#else
#include <sys/syscall.h>
#endif
Boolean _CFIsMainThread(void) {
return syscall(SYS_gettid) == getpid();
}
const char *_CFProcessPath(void) {
if (__CFProcessPath) return __CFProcessPath;
char buf[CFMaxPathSize + 1];
ssize_t res = readlink("/proc/self/exe", buf, CFMaxPathSize);
if (res > 0) {
// null terminate, readlink does not
buf[res] = 0;
__CFProcessPath = strdup(buf);
__CFprogname = strrchr(__CFProcessPath, PATH_SEP);
__CFprogname = (__CFprogname ? __CFprogname + 1 : __CFProcessPath);
} else {
__CFProcessPath = "";
__CFprogname = __CFProcessPath;
}
return __CFProcessPath;
}
#endif
CF_PRIVATE CFStringRef _CFProcessNameString(void) {
static CFStringRef __CFProcessNameString = NULL;
if (!__CFProcessNameString) {
const char *processName = *_CFGetProgname();
if (!processName) processName = "";
CFStringRef newStr = CFStringCreateWithCString(kCFAllocatorSystemDefault, processName, kCFPlatformInterfaceStringEncoding);
if (!OSAtomicCompareAndSwapPtrBarrier(NULL, (void *) newStr, (void * volatile *)& __CFProcessNameString)) {
CFRelease(newStr); // someone else made the assignment, so just release the extra string.
}
}
return __CFProcessNameString;
}
#if TARGET_OS_MAC || TARGET_OS_LINUX || TARGET_OS_BSD
#include <pwd.h>
#include <sys/param.h>
// Set the fallBackToHome parameter to true if we should fall back to the HOME environment variable if all else fails. Otherwise return NULL.
static CFURLRef _CFCopyHomeDirURLForUser(const char *username, bool fallBackToHome) {
const char *fixedHomePath = issetugid() ? NULL : __CFgetenv("CFFIXED_USER_HOME");
const char *homePath = NULL;
// Calculate the home directory we will use
// First try CFFIXED_USER_HOME (only if not setugid), then fall back to the upwd, then fall back to HOME environment variable
CFURLRef home = NULL;
if (!issetugid() && fixedHomePath) home = CFURLCreateFromFileSystemRepresentation(kCFAllocatorSystemDefault, (uint8_t *)fixedHomePath, strlen(fixedHomePath), true);
if (!home) {
struct passwd *upwd = NULL;
if (username) {
upwd = getpwnam(username);
} else {
uid_t euid;
__CFGetUGIDs(&euid, NULL);
upwd = getpwuid(euid ?: getuid());
}
if (upwd && upwd->pw_dir) {
home = CFURLCreateFromFileSystemRepresentation(kCFAllocatorSystemDefault, (uint8_t *)upwd->pw_dir, strlen(upwd->pw_dir), true);
}
}
if (fallBackToHome && !home) homePath = __CFgetenv("HOME");
if (fallBackToHome && !home && homePath) home = CFURLCreateFromFileSystemRepresentation(kCFAllocatorSystemDefault, (uint8_t *)homePath, strlen(homePath), true);
return home;
}
#endif
#define CFMaxHostNameLength 256
#define CFMaxHostNameSize (CFMaxHostNameLength+1)
CF_PRIVATE CFStringRef _CFStringCreateHostName(void) {
char myName[CFMaxHostNameSize];
// return @"" instead of nil a la CFUserName() and Ali Ozer
if (0 != gethostname(myName, CFMaxHostNameSize)) myName[0] = '\0';
return CFStringCreateWithCString(kCFAllocatorSystemDefault, myName, kCFPlatformInterfaceStringEncoding);
}
/* These are sanitized versions of the above functions. We might want to eliminate the above ones someday.
These can return NULL.
*/
CF_EXPORT CFStringRef CFGetUserName(void) {
return CFCopyUserName();
}
CF_EXPORT CFStringRef CFCopyUserName(void) {
CFStringRef result = NULL;
#if TARGET_OS_MAC || TARGET_OS_LINUX || TARGET_OS_BSD
uid_t euid;
__CFGetUGIDs(&euid, NULL);
struct passwd *upwd = getpwuid(euid ? euid : getuid());
if (upwd && upwd->pw_name) {
result = CFStringCreateWithCString(kCFAllocatorSystemDefault, upwd->pw_name, kCFPlatformInterfaceStringEncoding);
} else {
const char *cuser = __CFgetenv("USER");
if (cuser) {
result = CFStringCreateWithCString(kCFAllocatorSystemDefault, cuser, kCFPlatformInterfaceStringEncoding);
}
}
#elif TARGET_OS_WIN32
wchar_t username[1040];
DWORD size = 1040;
username[0] = 0;
if (GetUserNameW(username, &size)) {
// discount the extra NULL by decrementing the size
result = CFStringCreateWithCharacters(kCFAllocatorSystemDefault, (const UniChar *)username, size - 1);
} else {
const char *cname = __CFgetenv("USERNAME");
if (cname) {
result = CFStringCreateWithCString(kCFAllocatorSystemDefault, cname, kCFPlatformInterfaceStringEncoding);
}
}
#else
#error "Please add an implementation for CFCopyUserName() that copies the account username"
#endif
if (!result)
result = (CFStringRef)CFRetain(CFSTR(""));
return result;
}
#if TARGET_OS_ANDROID
#define pw_gecos pw_name
#endif
CF_CROSS_PLATFORM_EXPORT CFStringRef CFCopyFullUserName(void) {
CFStringRef result = NULL;
#if TARGET_OS_MAC || TARGET_OS_LINUX || TARGET_OS_BSD
uid_t euid;
__CFGetUGIDs(&euid, NULL);
struct passwd *upwd = getpwuid(euid ? euid : getuid());
if (upwd && upwd->pw_gecos) {
result = CFStringCreateWithCString(kCFAllocatorSystemDefault, upwd->pw_gecos, kCFPlatformInterfaceStringEncoding);
}
#elif TARGET_OS_WIN32
ULONG ulLength = 0;
GetUserNameExW(NameDisplay, NULL, &ulLength);
WCHAR *wszBuffer[ulLength + 1];
GetUserNameExW(NameDisplay, (LPWSTR)wszBuffer, &ulLength);
result = CFStringCreateWithCharacters(kCFAllocatorSystemDefault, (UniChar *)wszBuffer, ulLength);
#else
#error "Please add an implementation for CFCopyFullUserName() that copies the full (display) user name"
#endif
if (!result) {
result = (CFStringRef)CFRetain(CFSTR(""));
}
return result;
}
#if TARGET_OS_ANDROID
#undef pw_gecos
#endif
CFURLRef CFCopyHomeDirectoryURL(void) {
#if TARGET_OS_MAC || TARGET_OS_LINUX || TARGET_OS_BSD
return _CFCopyHomeDirURLForUser(NULL, true);
#elif TARGET_OS_WIN32
CFURLRef retVal = NULL;
CFIndex len = 0;
CFStringRef str = NULL;
UniChar pathChars[MAX_PATH];
if (S_OK == SHGetFolderPathW(NULL, CSIDL_PROFILE, NULL, SHGFP_TYPE_CURRENT, (wchar_t *)pathChars)) {
len = (CFIndex)wcslen((wchar_t *)pathChars);
str = CFStringCreateWithCharacters(kCFAllocatorSystemDefault, pathChars, len);
retVal = CFURLCreateWithFileSystemPath(kCFAllocatorSystemDefault, str, kCFURLWindowsPathStyle, true);
CFRelease(str);
}
if (!retVal) {
// Fall back to environment variable, but this will not be unicode compatible
const char *cpath = __CFgetenv("HOMEPATH");
const char *cdrive = __CFgetenv("HOMEDRIVE");
if (cdrive && cpath) {
char fullPath[CFMaxPathSize];
strlcpy(fullPath, cdrive, sizeof(fullPath));
strlcat(fullPath, cpath, sizeof(fullPath));
str = CFStringCreateWithCString(kCFAllocatorSystemDefault, fullPath, kCFPlatformInterfaceStringEncoding);
retVal = CFURLCreateWithFileSystemPath(kCFAllocatorSystemDefault, str, kCFURLWindowsPathStyle, true);
CFRelease(str);
}
}
if (!retVal) {
// Last resort: We have to get "some" directory location, so fall-back to the processes current directory.
UniChar currDir[MAX_PATH];
DWORD dwChars = GetCurrentDirectoryW(MAX_PATH + 1, (wchar_t *)currDir);
if (dwChars > 0) {
len = (CFIndex)wcslen((wchar_t *)currDir);
str = CFStringCreateWithCharacters(kCFAllocatorDefault, currDir, len);
retVal = CFURLCreateWithFileSystemPath(NULL, str, kCFURLWindowsPathStyle, true);
CFRelease(str);
}
}
// We could do more here (as in KB Article Q101507). If that article is to be believed, we should only run into this case on Win95, or through user error.
CFStringRef testPath = CFURLCopyFileSystemPath(retVal, kCFURLWindowsPathStyle);
if (CFStringGetLength(testPath) == 0) {
CFRelease(retVal);
retVal = NULL;
}
if (testPath) CFRelease(testPath);
return retVal;
#else
#error Dont know how to compute users home directories on this platform
#endif
}
CF_EXPORT CFURLRef CFCopyHomeDirectoryURLForUser(CFStringRef uName) {
#if TARGET_IPHONE_SIMULATOR
if (!uName) { // TODO: Handle other cases here? See <rdar://problem/18504645> SIM: CFCopyHomeDirectoryURLForUser should not call getpwuid
static CFURLRef home;
static dispatch_once_t once;
dispatch_once(&once, ^{
const char *env = getenv("CFFIXED_USER_HOME");
if (!env) {
env = getenv("HOME");
}
if (env) {
CFStringRef str = CFStringCreateWithFileSystemRepresentation(kCFAllocatorSystemDefault, env);
if (str) {
home = CFURLCreateWithFileSystemPath(kCFAllocatorSystemDefault, str, kCFURLPOSIXPathStyle, true);
CFRelease(str);
}
}
});
if (home) {
return CFRetain(home);
}
}
#endif
#if TARGET_OS_MAC || TARGET_OS_LINUX || TARGET_OS_BSD
if (!uName) {
return _CFCopyHomeDirURLForUser(NULL, true);
} else {
char buf[128], *user;
SInt32 len = CFStringGetLength(uName), size = CFStringGetMaximumSizeForEncoding(len, kCFPlatformInterfaceStringEncoding);
CFIndex usedSize;
if (size < 127) {
user = buf;
} else {
user = CFAllocatorAllocate(kCFAllocatorSystemDefault, size+1, 0);
}
CFURLRef result = NULL;
if (CFStringGetBytes(uName, CFRangeMake(0, len), kCFPlatformInterfaceStringEncoding, 0, true, (uint8_t *)user, size, &usedSize) == len) {
user[usedSize] = '\0';
result = _CFCopyHomeDirURLForUser(user, false);
} else {
result = _CFCopyHomeDirURLForUser(NULL, false);
}
if (buf != user) {
CFAllocatorDeallocate(kCFAllocatorSystemDefault, user);
}
return result;
}
#elif TARGET_OS_WIN32
// This code can only get the directory for the current user
CFStringRef userName = uName ? CFCopyUserName() : NULL;
if (uName && !CFEqual(uName, userName)) {
CFLog(kCFLogLevelError, CFSTR("CFCopyHomeDirectoryURLForUser(): Unable to get home directory for other user"));
if (userName) CFRelease(userName);
return NULL;
}
if (userName) CFRelease(userName);
return CFCopyHomeDirectoryURL();
#else
#error Dont know how to compute users home directories on this platform
#endif
}
#undef CFMaxHostNameLength
#undef CFMaxHostNameSize
#if TARGET_OS_WIN32
CF_INLINE CFIndex strlen_UniChar(const UniChar* p) {
CFIndex result = 0;
while ((*p++) != 0)
++result;
return result;
}
//#include <shfolder.h>
/*
* _CFCreateApplicationRepositoryPath returns the path to the application's
* repository in a CFMutableStringRef. The path returned will be:
* <nFolder_path>\Apple Computer\<bundle_name>\
* or if the bundle name cannot be obtained:
* <nFolder_path>\Apple Computer\
* where nFolder_path is obtained by calling SHGetFolderPath with nFolder
* (for example, with CSIDL_APPDATA or CSIDL_LOCAL_APPDATA).
*
* The CFMutableStringRef result must be released by the caller.
*
* If anything fails along the way, the result will be NULL.
*/
CF_EXPORT CFMutableStringRef _CFCreateApplicationRepositoryPath(CFAllocatorRef alloc, int nFolder) {
CFMutableStringRef result = NULL;
UniChar szPath[MAX_PATH];
// get the current path to the data repository: CSIDL_APPDATA (roaming) or CSIDL_LOCAL_APPDATA (nonroaming)
if (S_OK == SHGetFolderPathW(NULL, nFolder, NULL, 0, (wchar_t *) szPath)) {
CFStringRef directoryPath;
// make it a CFString
directoryPath = CFStringCreateWithCharacters(alloc, szPath, strlen_UniChar(szPath));
if (directoryPath) {
CFBundleRef bundle;
CFStringRef bundleName;
CFStringRef completePath;
// attempt to get the bundle name
bundle = CFBundleGetMainBundle();
if (bundle) {
bundleName = (CFStringRef)CFBundleGetValueForInfoDictionaryKey(bundle, kCFBundleNameKey);
}
else {
bundleName = NULL;
}
if (bundleName) {
// the path will be "<directoryPath>\Apple Computer\<bundleName>\" if there is a bundle name
completePath = CFStringCreateWithFormat(alloc, NULL, CFSTR("%@\\Apple Computer\\%@\\"), directoryPath, bundleName);
}
else {
// or "<directoryPath>\Apple Computer\" if there is no bundle name.
completePath = CFStringCreateWithFormat(alloc, NULL, CFSTR("%@\\Apple Computer\\"), directoryPath);
}
CFRelease(directoryPath);
// make a mutable copy to return
if (completePath) {
result = CFStringCreateMutableCopy(alloc, 0, completePath);
CFRelease(completePath);
}
}
}
return ( result );
}
#endif
#pragma mark -
#pragma mark Thread Functions
#if TARGET_OS_WIN32
CF_EXPORT void _NS_pthread_setname_np(const char *name) {
_CFThreadSetName(GetCurrentThread(), name);
}
static _CFThreadRef __initialPthread = INVALID_HANDLE_VALUE;
CF_EXPORT int _NS_pthread_main_np() {
if (__initialPthread == INVALID_HANDLE_VALUE)
DuplicateHandle(GetCurrentProcess(), GetCurrentThread(),
GetCurrentProcess(), &__initialPthread, 0, FALSE,
DUPLICATE_SAME_ACCESS);
return CompareObjectHandles(__initialPthread, GetCurrentThread());
}
CF_EXPORT bool _NS_pthread_equal(_CFThreadRef t1, _CFThreadRef t2) {
return CompareObjectHandles(t1, t2) == TRUE;
}
#endif
#pragma mark -
#pragma mark Thread Local Data
// If slot >= CF_TSD_MAX_SLOTS, the SPI functions will crash at NULL + slot address.
// If thread data has been torn down, these functions should crash on CF_TSD_BAD_PTR + slot address.
#define CF_TSD_MAX_SLOTS 70
// Windows and Linux, not sure how many times the destructor could get called; CF_TSD_MAX_DESTRUCTOR_CALLS could be 1
#define CF_TSD_BAD_PTR ((void *)0x1000)
typedef void (*tsdDestructor)(void *);
// Data structure to hold TSD data, cleanup functions for each
typedef struct __CFTSDTable {
uint32_t destructorCount;
uintptr_t data[CF_TSD_MAX_SLOTS];
tsdDestructor destructors[CF_TSD_MAX_SLOTS];
} __CFTSDTable;
static void __CFTSDFinalize(void *arg);
#if TARGET_OS_WIN32
static DWORD __CFTSDIndexKey = 0xFFFFFFFF;
// Called from CFRuntime's startup code, on Windows only
CF_PRIVATE void __CFTSDWindowsInitialize() {
__CFTSDIndexKey = FlsAlloc(__CFTSDFinalize);
}
// Called from CFRuntime's cleanup code, on Windows only
CF_PRIVATE void __CFTSDWindowsCleanup() {
FlsFree(__CFTSDIndexKey);
}
// Called for each thread as it exits, on Windows only
CF_PRIVATE void __CFFinalizeWindowsThreadData() {
// Normally, this should call the finalizer several times to emulate the behavior of pthreads on Windows. However, a few bugs keep us from doing this:
// <rdar://problem/8989063> REGRESSION(CF-610-CF-611): Crash closing Safari in BonjourDB destructor (Windows)
// <rdar://problem/9326814> SyncUIHandler crashes after conflict is resolved and we do SyncNow
// and a bug in dispatch keeps us from using pthreadsWin32 directly, because it does not deal with the case of a dispatch_async happening during process exit (it attempts to create a thread, but that is illegal on Win32 and causes a hang).
// So instead we just finalize once, which is the behavior pre-Airwolf anyway
__CFTSDFinalize(TlsGetValue(__CFTSDIndexKey));
}
#else
static _CFThreadSpecificKey __CFTSDIndexKey;
CF_PRIVATE void __CFTSDInitialize() {
static dispatch_once_t once;
dispatch_once(&once, ^{
(void)pthread_key_create(&__CFTSDIndexKey, __CFTSDFinalize);
});
}
#endif
static void __CFTSDSetSpecific(void *arg) {
#if TARGET_OS_MAC
pthread_setspecific(__CFTSDIndexKey, arg);
#elif TARGET_OS_LINUX
pthread_setspecific(__CFTSDIndexKey, arg);
#elif TARGET_OS_WIN32
FlsSetValue(__CFTSDIndexKey, arg);
#endif
}
static void *__CFTSDGetSpecific() {
#if TARGET_OS_MAC
return pthread_getspecific(__CFTSDIndexKey);
#elif TARGET_OS_LINUX
return pthread_getspecific(__CFTSDIndexKey);
#elif TARGET_OS_WIN32
return FlsGetValue(__CFTSDIndexKey);
#endif
}
_Atomic(bool) __CFMainThreadHasExited = false;
static void __CFTSDFinalize(void *arg) {
if (pthread_main_np()) {
__CFMainThreadHasExited = true;
}
// Set our TSD so we're called again by pthreads. It will call the destructor PTHREAD_DESTRUCTOR_ITERATIONS times as long as a value is set in the thread specific data. We handle each case below.
__CFTSDSetSpecific(arg);
if (!arg || arg == CF_TSD_BAD_PTR) {
// We've already been destroyed. The call above set the bad pointer again. Now we just return.
return;
}
__CFTSDTable *table = (__CFTSDTable *)arg;
table->destructorCount++;
// On first calls invoke destructor. Later we destroy the data.
// Note that invocation of the destructor may cause a value to be set again in the per-thread data slots. The destructor count and destructors are preserved.
// This logic is basically the same as what pthreads does. We just skip the 'created' flag.
for (int32_t i = 0; i < CF_TSD_MAX_SLOTS; i++) {
if (table->data[i] && table->destructors[i]) {
uintptr_t old = table->data[i];
table->data[i] = (uintptr_t)NULL;
table->destructors[i]((void *)(old));
}
}
#if _POSIX_THREADS
if (table->destructorCount == PTHREAD_DESTRUCTOR_ITERATIONS - 1) { // On PTHREAD_DESTRUCTOR_ITERATIONS-1 call, destroy our data
free(table);
// Now if the destructor is called again we will take the shortcut at the beginning of this function.
__CFTSDSetSpecific(CF_TSD_BAD_PTR);
return;
}
#else
free(table);
__CFTSDSetSpecific(CF_TSD_BAD_PTR);
#endif
}
#if TARGET_OS_MAC
extern int pthread_key_init_np(int, void (*)(void *));
#endif
// Get or initialize a thread local storage. It is created on demand.
static __CFTSDTable *__CFTSDGetTable(const Boolean create) {
__CFTSDTable *table = (__CFTSDTable *)__CFTSDGetSpecific();
// Make sure we're not setting data again after destruction.
if (table == CF_TSD_BAD_PTR) {
return NULL;
}
// Create table on demand
if (!table && create) {
// This memory is freed in the finalize function
table = (__CFTSDTable *)calloc(1, sizeof(__CFTSDTable));
// Windows and Linux have created the table already, we need to initialize it here for other platforms. On Windows, the cleanup function is called by DllMain when a thread exits. On Linux the destructor is set at init time.
#if !TARGET_OS_WIN32
__CFTSDInitialize();
#endif
__CFTSDSetSpecific(table);
}
return table;
}
// For the use of CF and Foundation only
CF_EXPORT void *_CFGetTSDCreateIfNeeded(const uint32_t slot, const Boolean create) {
if (slot >= CF_TSD_MAX_SLOTS) {
_CFLogSimple(kCFLogLevelError, "Error: TSD slot %d out of range (get)", slot);
HALT;
}
void * result = NULL;
__CFTSDTable *table = __CFTSDGetTable(create);
if (table) {
uintptr_t *slots = (uintptr_t *)(table->data);
result = (void *)slots[slot];
}
else if (create) {
// Someone is getting TSD during thread destruction. The table is gone, so we can't get any data anymore.
_CFLogSimple(kCFLogLevelWarning, "Warning: TSD slot %d retrieved but the thread data has already been torn down.", slot);
return NULL;
}
return result;
}
// For the use of CF and Foundation only
CF_EXPORT void *_CFGetTSD(uint32_t slot) {
return _CFGetTSDCreateIfNeeded(slot, true);
}
// For the use of CF and Foundation only
CF_EXPORT void *_CFSetTSD(uint32_t slot, void *newVal, tsdDestructor destructor) {
if (slot >= CF_TSD_MAX_SLOTS) {
_CFLogSimple(kCFLogLevelError, "Error: TSD slot %d out of range (set)", slot);
HALT;
}
__CFTSDTable *table = __CFTSDGetTable(true);
if (!table) {
// Someone is setting TSD during thread destruction. The table is gone, so we can't get any data anymore.
_CFLogSimple(kCFLogLevelWarning, "Warning: TSD slot %d set but the thread data has already been torn down.", slot);
return NULL;
}
void *oldVal = (void *)table->data[slot];
table->data[slot] = (uintptr_t)newVal;
table->destructors[slot] = destructor;
return oldVal;
}
#pragma mark -
#pragma mark Windows Wide to UTF8 and UTF8 to Wide
#if TARGET_OS_WIN32
/* On Windows, we want to use UTF-16LE for path names to get full unicode support. Internally, however, everything remains in UTF-8 representation. These helper functions stand between CF and the Microsoft CRT to ensure that we are using the right representation on both sides. */
#include <sys/stat.h>
#include <share.h>
// Creates a buffer of wchar_t to hold a UTF16LE version of the UTF8 str passed in. Caller must free the buffer when done. If resultLen is non-NULL, it is filled out with the number of characters in the string.
static wchar_t *createWideFileSystemRepresentation(const char *str, CFIndex *resultLen) {
// Get the real length of the string in UTF16 characters
CFStringRef cfStr = CFStringCreateWithCString(kCFAllocatorSystemDefault, str, kCFStringEncodingUTF8);
CFIndex strLen = CFStringGetLength(cfStr);
// Allocate a wide buffer to hold the converted string, including space for a NULL terminator
wchar_t *wideBuf = (wchar_t *)malloc((strLen + 1) * sizeof(wchar_t));
// Copy the string into the buffer and terminate
CFStringGetCharacters(cfStr, CFRangeMake(0, strLen), (UniChar *)wideBuf);
wideBuf[strLen] = 0;
CFRelease(cfStr);
if (resultLen) *resultLen = strLen;
return wideBuf;
}
// Copies a UTF16 buffer into a supplied UTF8 buffer.
static void copyToNarrowFileSystemRepresentation(const wchar_t *wide, CFIndex dstBufSize, char *dstbuf) {
// Get the real length of the wide string in UTF8 characters
CFStringRef cfStr = CFStringCreateWithCharacters(kCFAllocatorSystemDefault, (const UniChar *)wide, wcslen(wide));
CFIndex strLen = CFStringGetLength(cfStr);
CFIndex bytesUsed;
// Copy the wide string into the buffer and terminate
CFStringGetBytes(cfStr, CFRangeMake(0, strLen), kCFStringEncodingUTF8, 0, false, (uint8_t *)dstbuf, dstBufSize, &bytesUsed);
dstbuf[bytesUsed] = 0;
CFRelease(cfStr);
}
CF_EXPORT int _NS_stat(const char *name, struct _stat *st) {
wchar_t *wide = createWideFileSystemRepresentation(name, NULL);
int res = _wstat(wide, st);
free(wide);
return res;
}
CF_EXPORT int _NS_mkdir(const char *name) {
wchar_t *wide = createWideFileSystemRepresentation(name, NULL);
int res = _wmkdir(wide);
free(wide);
return res;
}
CF_EXPORT int _NS_rmdir(const char *name) {
wchar_t *wide = createWideFileSystemRepresentation(name, NULL);
int res = _wrmdir(wide);
free(wide);
return res;
}
CF_EXPORT int _NS_chmod(const char *name, int mode) {
wchar_t *wide = createWideFileSystemRepresentation(name, NULL);
// Convert mode
int newMode = 0;
if (mode | 0400) newMode |= _S_IREAD;
if (mode | 0200) newMode |= _S_IWRITE;
if (mode | 0100) newMode |= _S_IEXEC;
int res = _wchmod(wide, newMode);
free(wide);
return res;
}
CF_EXPORT int _NS_unlink(const char *name) {
wchar_t *wide = createWideFileSystemRepresentation(name, NULL);
int res = _wunlink(wide);
free(wide);
return res;
}
// Warning: this doesn't support dstbuf as null even though 'getcwd' does
CF_EXPORT char *_NS_getcwd(char *dstbuf, size_t size) {
if (!dstbuf) {
CFLog(kCFLogLevelWarning, CFSTR("CFPlatform: getcwd called with null buffer"));
return 0;
}
wchar_t *buf = _wgetcwd(NULL, 0);
if (!buf) {
return NULL;
}
// Convert result to UTF8
copyToNarrowFileSystemRepresentation(buf, (CFIndex)size, dstbuf);
free(buf);
return dstbuf;
}
CF_EXPORT char *_NS_getenv(const char *name) {
// todo: wide getenv
// We have to be careful what happens here, because getenv is called during cf initialization, and things like cfstring may not be working yet
return getenv(name);
}
CF_EXPORT int _NS_rename(const char *oldName, const char *newName) {
wchar_t *oldWide = createWideFileSystemRepresentation(oldName, NULL);
wchar_t *newWide = createWideFileSystemRepresentation(newName, NULL);
// _wrename on Windows does not behave exactly as rename() on Mac OS -- if the file exists, the Windows one will fail whereas the Mac OS version will replace
// To simulate the Mac OS behavior, we use the Win32 API then fill out errno if something goes wrong
BOOL winRes = MoveFileExW(oldWide, newWide, MOVEFILE_REPLACE_EXISTING);
DWORD error = GetLastError();
if (!winRes) {
switch (error) {
case ERROR_SUCCESS:
errno = 0;
break;
case ERROR_FILE_NOT_FOUND:
case ERROR_PATH_NOT_FOUND:
case ERROR_OPEN_FAILED:
errno = ENOENT;
break;
case ERROR_ACCESS_DENIED:
errno = EACCES;
break;
default:
errno = error;
}
}
free(oldWide);
free(newWide);
return (winRes ? 0 : -1);
}
CF_EXPORT int _NS_open(const char *name, int oflag, int pmode) {
wchar_t *wide = createWideFileSystemRepresentation(name, NULL);
DWORD dwDesiredAccess = 0;
switch (oflag & (O_RDONLY | O_WRONLY | O_RDWR)) {
case _O_RDONLY:
dwDesiredAccess = GENERIC_READ;
break;
case _O_WRONLY:
dwDesiredAccess = GENERIC_WRITE;
break;
case _O_RDWR:
dwDesiredAccess = GENERIC_READ | GENERIC_WRITE;
break;
}
DWORD dwCreationDisposition;
switch (oflag & (O_CREAT | O_EXCL | O_TRUNC)) {
case O_CREAT:
dwCreationDisposition = OPEN_ALWAYS;
break;
case O_EXCL:
dwCreationDisposition = CREATE_NEW;
break;
case O_TRUNC:
dwCreationDisposition = TRUNCATE_EXISTING;
break;
default:
dwCreationDisposition = OPEN_EXISTING;
}
// Backup semantics are required to receive a handle to a directory
DWORD dwFlagsAndAttributes = FILE_FLAG_BACKUP_SEMANTICS;
if (pmode & _S_IREAD) {
dwFlagsAndAttributes |= FILE_ATTRIBUTE_READONLY;
}
HANDLE handle = CreateFileW(wide, dwDesiredAccess, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
/* lpSecurityAttributes= */NULL, dwCreationDisposition, dwFlagsAndAttributes,
/* hTemplatefile= */ NULL);
free(wide);
if (handle == INVALID_HANDLE_VALUE) {
DWORD error = GetLastError();
switch (error) {
case ERROR_ACCESS_DENIED:
case ERROR_SHARING_VIOLATION:
errno = EACCES;
break;
case ERROR_FILE_EXISTS:
case ERROR_ALREADY_EXISTS:
errno = EEXIST;
break;
case ERROR_FILE_NOT_FOUND:
case ERROR_PATH_NOT_FOUND:
errno = ENOENT;
break;
default:
errno = EIO;
break;
}
return -1;
}
// _open_osfhandle handles _O_APPEND and _O_RDONLY
int fd = _open_osfhandle((intptr_t)handle, oflag);
if (fd == -1) {
CloseHandle(handle);
return -1;
}
return fd;
}
CF_EXPORT int _NS_chdir(const char *name) {
wchar_t *wide = createWideFileSystemRepresentation(name, NULL);
int res = _wchdir(wide);
free(wide);
return res;
}
CF_EXPORT int _NS_access(const char *name, int amode) {
// execute is always true
if (amode == 1) return 0;
wchar_t *wide = createWideFileSystemRepresentation(name, NULL);
// we only care about the read-only (04) and write-only (02) bits, so mask octal 06
int res = _waccess(wide, amode & 06);
free(wide);
return res;
}
// This is a bit different than the standard 'mkstemp', because the size parameter is needed so we know the size of the UTF8 buffer
// Also, we don't avoid the race between creating a temporary file name and opening it on Windows like we do on Mac
CF_EXPORT int _NS_mkstemp(char *name, int bufSize) {
CFIndex nameLen;
wchar_t *wide = createWideFileSystemRepresentation(name, &nameLen);
// First check to see if the directory that this new temporary file will be created in exists. If not, set errno to ENOTDIR. This mimics the behavior of mkstemp on MacOS more closely.
// Look for the last '\' in the path
wchar_t *lastSlash = wcsrchr(wide, '\\');
if (!lastSlash) {
free(wide);
return -1;
}
// Set the last slash to NULL temporarily and use it for _wstat
*lastSlash = 0;
struct _stat dirInfo;
int res = _wstat(wide, &dirInfo);
if (res < 0) {
if (errno == ENOENT) {
errno = ENOTDIR;
}
free(wide);
return -1;
}