ObjFW  OFURLHandler_file.m at [698a1b8b13]

File src/OFURLHandler_file.m artifact 39fecea33b part of check-in 698a1b8b13


/*
 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
 *               2018
 *   Jonathan Schleifer <js@heap.zone>
 *
 * All rights reserved.
 *
 * This file is part of ObjFW. It may be distributed under the terms of the
 * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
 * the packaging of this file.
 *
 * Alternatively, it may be distributed under the terms of the GNU General
 * Public License, either version 2 or 3, which can be found in the file
 * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
 * file.
 */

#include "config.h"

#include <errno.h>

#ifdef HAVE_DIRENT_H
# include <dirent.h>
#endif
#include "unistd_wrapper.h"

#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif

#ifdef HAVE_PWD_H
# include <pwd.h>
#endif
#ifdef HAVE_GRP_H
# include <grp.h>
#endif

#import "OFURLHandler_file.h"
#import "OFArray.h"
#import "OFDate.h"
#import "OFFile.h"
#import "OFLocale.h"
#import "OFNumber.h"
#import "OFURL.h"

#ifdef OF_HAVE_THREADS
# import "OFMutex.h"
#endif

#import "OFCreateDirectoryFailedException.h"
#import "OFCreateSymbolicLinkFailedException.h"
#import "OFInitializationFailedException.h"
#import "OFInvalidArgumentException.h"
#import "OFLinkFailedException.h"
#import "OFMoveItemFailedException.h"
#import "OFNotImplementedException.h"
#import "OFOpenItemFailedException.h"
#import "OFOutOfRangeException.h"
#import "OFReadFailedException.h"
#import "OFRemoveItemFailedException.h"
#import "OFRetrieveItemAttributesFailedException.h"
#import "OFSetItemAttributesFailedException.h"

#ifdef OF_WINDOWS
# include <windows.h>
# include <direct.h>
# include <ntdef.h>
#endif

#ifdef OF_AMIGAOS
# ifdef OF_AMIGAOS4
#  define __USE_INLINE__
#  define __NOLIBBASE__
#  define __NOGLOBALIFACE__
# endif
# include <proto/exec.h>
# include <proto/dos.h>
# include <proto/locale.h>
# ifdef OF_AMIGAOS4
#  define DeleteFile(path) Delete(path)
# endif
#endif

#if defined(OF_WINDOWS)
typedef struct __stat64 of_stat_t;
#elif defined(OF_AMIGAOS)
typedef struct {
	of_offset_t st_size;
	mode_t st_mode;
	of_time_interval_t st_atime, st_mtime, st_ctime;
} of_stat_t;
#elif defined(OF_HAVE_OFF64_T)
typedef struct stat64 of_stat_t;
#else
typedef struct stat of_stat_t;
#endif

#ifndef S_ISLNK
# define S_ISLNK(s) 0
#endif

#if defined(OF_HAVE_CHOWN) && defined(OF_HAVE_THREADS) && !defined(OF_AMIGAOS)
static OFMutex *passwdMutex;
#endif
#if !defined(HAVE_READDIR_R) && defined(OF_HAVE_THREADS) && !defined(OF_WINDOWS)
static OFMutex *readdirMutex;
#endif

#ifdef OF_WINDOWS
static WINAPI BOOLEAN (*func_CreateSymbolicLinkW)(LPCWSTR, LPCWSTR, DWORD);
#endif

#ifdef OF_AMIGAOS4
extern struct ExecIFace *IExec;
static struct Library *DOSBase = NULL;
static struct DOSIFace *IDOS = NULL;
static struct Library *LocaleBase = NULL;
static struct LocaleIFace *ILocale = NULL;

OF_DESTRUCTOR()
{
	if (ILocale != NULL)
		DropInterface(ILocale);

	if (LocaleBase != NULL)
		CloseLibrary(LocaleBase);

	if (IDOS != NULL)
		DropInterface(IDOS);

	if (DOSBase != NULL)
		CloseLibrary(DOSBase);
}
#endif

static int
of_stat(OFString *path, of_stat_t *buffer)
{
#if defined(OF_WINDOWS)
	return _wstat64([path UTF16String], buffer);
#elif defined(OF_AMIGAOS)
	BPTR lock;
# ifdef OF_AMIGAOS4
	struct ExamineData *ed;
# else
	struct FileInfoBlock fib;
# endif
	of_time_interval_t timeInterval;
	struct Locale *locale;
	struct DateStamp *date;

	if ((lock = Lock([path cStringWithEncoding: [OFLocale encoding]],
	    SHARED_LOCK)) == 0) {
		switch (IoErr()) {
		case ERROR_OBJECT_IN_USE:
		case ERROR_DISK_NOT_VALIDATED:
			errno = EBUSY;
			break;
		case ERROR_OBJECT_NOT_FOUND:
			errno = ENOENT;
			break;
		default:
			errno = 0;
			break;
		}

		return -1;
	}

# if defined(OF_MORPHOS)
	if (!Examine64(lock, &fib, TAG_DONE)) {
# elif defined(OF_AMIGAOS4)
	if ((ed = ExamineObjectTags(EX_FileLockInput, lock, TAG_END)) == NULL) {
# else
	if (!Examine(lock, &fib)) {
# endif
		UnLock(lock);

		errno = 0;
		return -1;
	}

	UnLock(lock);

# if defined(OF_MORPHOS)
	buffer->st_size = fib.fib_Size64;
# elif defined(OF_AMIGAOS4)
	buffer->st_size = ed->FileSize;
# else
	buffer->st_size = fib.fib_Size;
# endif
# ifdef OF_AMIGAOS4
	buffer->st_mode = (EXD_IS_DIRECTORY(ed) ? S_IFDIR : S_IFREG);
# else
	buffer->st_mode = (fib.fib_DirEntryType > 0 ? S_IFDIR : S_IFREG);
# endif

	timeInterval = 252460800;	/* 1978-01-01 */

	locale = OpenLocale(NULL);
	/*
	 * FIXME: This does not take DST into account. But unfortunately, there
	 * is no way to figure out if DST was in effect when the file was
	 * modified.
	 */
	timeInterval += locale->loc_GMTOffset * 60.0;
	CloseLocale(locale);

# ifdef OF_AMIGAOS4
	date = &ed->Date;
# else
	date = &fib.fib_Date;
# endif
	timeInterval += date->ds_Days * 86400.0;
	timeInterval += date->ds_Minute * 60.0;
	timeInterval += date->ds_Tick / (of_time_interval_t)TICKS_PER_SECOND;

	buffer->st_atime = buffer->st_mtime = buffer->st_ctime = timeInterval;

# ifdef OF_AMIGAOS4
	FreeDosObject(DOS_EXAMINEDATA, ed);
# endif

	return 0;
#elif defined(OF_HAVE_OFF64_T)
	return stat64([path cStringWithEncoding: [OFLocale encoding]], buffer);
#else
	return stat([path cStringWithEncoding: [OFLocale encoding]], buffer);
#endif
}

static int
of_lstat(OFString *path, of_stat_t *buffer)
{
#if defined(HAVE_LSTAT) && !defined(OF_WINDOWS) && !defined(OF_AMIGAOS) && \
    !defined(OF_NINTENDO_3DS)
# ifdef OF_HAVE_OFF64_T
	return lstat64([path cStringWithEncoding: [OFLocale encoding]], buffer);
# else
	return lstat([path cStringWithEncoding: [OFLocale encoding]], buffer);
# endif
#else
	return of_stat(path, buffer);
#endif
}

static void
setTypeAttribute(of_mutable_file_attributes_t attributes, of_stat_t *s)
{
	if (S_ISREG(s->st_mode))
		[attributes setObject: of_file_type_regular
			       forKey: of_file_attribute_key_type];
	else if (S_ISDIR(s->st_mode))
		[attributes setObject: of_file_type_directory
			       forKey: of_file_attribute_key_type];
#ifdef S_ISLNK
	else if (S_ISLNK(s->st_mode))
		[attributes setObject: of_file_type_symbolic_link
			       forKey: of_file_attribute_key_type];
#endif
#ifdef S_ISFIFO
	else if (S_ISFIFO(s->st_mode))
		[attributes setObject: of_file_type_fifo
			       forKey: of_file_attribute_key_type];
#endif
#ifdef S_ISCHR
	else if (S_ISCHR(s->st_mode))
		[attributes setObject: of_file_type_character_special
			       forKey: of_file_attribute_key_type];
#endif
#ifdef S_ISBLK
	else if (S_ISBLK(s->st_mode))
		[attributes setObject: of_file_type_block_special
			       forKey: of_file_attribute_key_type];
#endif
#ifdef S_ISSOCK
	else if (S_ISSOCK(s->st_mode))
		[attributes setObject: of_file_type_socket
			       forKey: of_file_attribute_key_type];
#endif
}

static void
setDateAttributes(of_mutable_file_attributes_t attributes, of_stat_t *s)
{
	/* FIXME: We could be more precise on some OSes */
	[attributes
	    setObject: [OFDate dateWithTimeIntervalSince1970: s->st_atime]
	       forKey: of_file_attribute_key_last_access_date];
	[attributes
	    setObject: [OFDate dateWithTimeIntervalSince1970: s->st_mtime]
	       forKey: of_file_attribute_key_modification_date];
	[attributes
	    setObject: [OFDate dateWithTimeIntervalSince1970: s->st_ctime]
	       forKey: of_file_attribute_key_status_change_date];
}

static void
setOwnerAndGroupAttributes(of_mutable_file_attributes_t attributes,
    of_stat_t *s)
{
#ifdef OF_FILE_MANAGER_SUPPORTS_OWNER
	[attributes setObject: [NSNumber numberWithUInt16: s->st_uid]
		       forKey: of_file_attribute_key_posix_uid];
	[attributes setObject: [NSNumber numberWithUInt16: s->st_gid]
		       forKey: of_file_attribute_key_posix_gid];

# ifdef OF_HAVE_THREADS
	[passwdMutex lock];
	@try {
# endif
		of_string_encoding_t encoding = [OFLocale encoding];
		struct passwd *passwd = getpwuid(s->st_uid);
		struct group *group_ = getgrgid(s->st_gid);

		if (passwd != NULL) {
			OFString *owner = [OFString
			    stringWithCString: passwd->pw_name
				     encoding: encoding];

			[attributes setObject: owner
				       forKey: of_file_attribute_key_owner];
		}

		if (group_ != NULL) {
			OFString *group = [OFString
			    stringWithCString: group_->gr_name
				     encoding: encoding];

			[attributes setObject: group
				       forKey: of_file_attribute_key_group];
		}
# ifdef OF_HAVE_THREADS
	} @finally {
		[passwdMutex unlock];
	}
# endif
#endif
}

static void
setSymbolicLinkDestinationAttribute(of_mutable_file_attributes_t attributes,
    of_stat_t *s, OFURL *URL)
{
#ifdef OF_FILE_MANAGER_SUPPORTS_SYMLINKS
	OFString *path = [URL fileSystemRepresentation];

# ifndef OF_WINDOWS
	if (S_ISLNK(s->st_mode)) {
		of_string_encoding_t encoding = [OFLocale encoding];
		char destinationC[PATH_MAX];
		ssize_t length;
		OFString *destination;
		of_file_attribute_key_t key;

		length = readlink([path cStringWithEncoding: encoding],
		    destinationC, PATH_MAX);

		if (length < 0)
			@throw [OFRetrieveItemAttributesFailedException
			    exceptionWithURL: URL
				       errNo: errno];

		destination = [OFString stringWithCString: destinationC
						 encoding: encoding
						   length: length];

		key = of_file_attribute_key_symbolic_link_destination;
		[attributes setObject: destination
			       forKey: key];
	}
# else
	WIN32_FIND_DATAW data;

	if (func_CreateSymbolicLinkW != NULL &&
	    FindFirstFileW([path UTF16String], &data) &&
	    (data.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
	    data.dwReserved0 == IO_REPARSE_TAG_SYMLINK) {
		HANDLE handle;
		OFString *destination;

		if ((handle = CreateFileW([path UTF16String], 0,
		    (FILE_SHARE_READ | FILE_SHARE_WRITE), NULL, OPEN_EXISTING,
		    FILE_FLAG_OPEN_REPARSE_POINT, NULL)) ==
		    INVALID_HANDLE_VALUE)
			@throw [OFRetrieveItemAttributesFailedException
			    exceptionWithURL: URL
				       errNo: 0];

		@try {
			union {
				char bytes[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
				REPARSE_DATA_BUFFER data;
			} buffer;
			DWORD size;
			wchar_t *tmp;
			of_file_attribute_key_t key;

			if (!DeviceIoControl(handle, FSCTL_GET_REPARSE_POINT,
			    NULL, 0, buffer.bytes,
			    MAXIMUM_REPARSE_DATA_BUFFER_SIZE, &size, NULL))
				@throw [OFRetrieveItemAttributesFailedException
				    exceptionWithURL: URL
					       errNo: 0];

			if (buffer.data.ReparseTag != IO_REPARSE_TAG_SYMLINK)
				@throw [OFRetrieveItemAttributesFailedException
				    exceptionWithURL: URL
					       errNo: 0];

#  define slrb buffer.data.SymbolicLinkReparseBuffer
			tmp = slrb.PathBuffer +
			    (slrb.SubstituteNameOffset / sizeof(wchar_t));

			destination = [OFString
			    stringWithUTF16String: tmp
					   length: slrb.SubstituteNameLength /
						   sizeof(wchar_t)];

			[attributes setObject: of_file_type_symbolic_link
				       forKey: of_file_attribute_key_type];
			key = of_file_attribute_key_symbolic_link_destination;
			[attributes setObject: destination
				       forKey: key];
#  undef slrb
		} @finally {
			CloseHandle(handle);
		}
	}
# endif
#endif
}

@implementation OFURLHandler_file
+ (void)initialize
{
#ifdef OF_WINDOWS
	HMODULE module;
#endif

	if (self != [OFURLHandler_file class])
		return;

#ifdef OF_AMIGAOS4
	if ((DOSBase = OpenLibrary("dos.library", 36)) == NULL)
		@throw [OFInitializationFailedException
		    exceptionWithClass: self];

	if ((IDOS = (struct DOSIFace *)
	    GetInterface(DOSBase, "main", 1, NULL)) == NULL)
		@throw [OFInitializationFailedException
		    exceptionWithClass: self];

	if ((LocaleBase = OpenLibrary("locale.library", 38)) == NULL)
		@throw [OFInitializationFailedException
		    exceptionWithClass: self];

	if ((ILocale = (struct LocaleIFace *)
	    GetInterface(LocaleBase, "main", 1, NULL)) == NULL)
		@throw [OFInitializationFailedException
		    exceptionWithClass: self];
#endif

#if defined(OF_HAVE_CHOWN) && defined(OF_HAVE_THREADS)
	passwdMutex = [[OFMutex alloc] init];
#endif
#if !defined(HAVE_READDIR_R) && !defined(OF_WINDOWS) && defined(OF_HAVE_THREADS)
	readdirMutex = [[OFMutex alloc] init];
#endif

#ifdef OF_WINDOWS
	if ((module = LoadLibrary("kernel32.dll")) != NULL)
		func_CreateSymbolicLinkW =
		    (WINAPI BOOLEAN (*)(LPCWSTR, LPCWSTR, DWORD))
		    GetProcAddress(module, "CreateSymbolicLinkW");
#endif

	/*
	 * Make sure OFFile is initialized.
	 * On some systems, this is needed to initialize the file system driver.
	 */
	[OFFile class];
}

+ (bool)of_directoryExistsAtPath: (OFString *)path
{
	of_stat_t s;

	if (of_stat(path, &s) == -1)
		return false;

	return S_ISDIR(s.st_mode);
}

- (OFStream *)openItemAtURL: (OFURL *)URL
		       mode: (OFString *)mode
{
	void *pool = objc_autoreleasePoolPush();
	OFFile *file = [[OFFile alloc]
	    initWithPath: [URL fileSystemRepresentation]
		    mode: mode];

	objc_autoreleasePoolPop(pool);

	return [file autorelease];
}

- (of_file_attributes_t)attributesOfItemAtURL: (OFURL *)URL
{
	of_mutable_file_attributes_t ret = [OFMutableDictionary dictionary];
	void *pool = objc_autoreleasePoolPush();
	OFString *path;
	of_stat_t s;

	if (URL == nil)
		@throw [OFInvalidArgumentException exception];

	if (![[URL scheme] isEqual: _scheme])
		@throw [OFInvalidArgumentException exception];

	path = [URL fileSystemRepresentation];

	if (of_lstat(path, &s) == -1)
		@throw [OFRetrieveItemAttributesFailedException
		    exceptionWithURL: URL
			       errNo: errno];

	if (s.st_size < 0)
		@throw [OFOutOfRangeException exception];

	[ret setObject: [NSNumber numberWithUIntMax: s.st_size]
		forKey: of_file_attribute_key_size];

	setTypeAttribute(ret, &s);

	[ret setObject: [NSNumber numberWithUInt16: s.st_mode & 07777]
		forKey: of_file_attribute_key_posix_permissions];

	setOwnerAndGroupAttributes(ret, &s);
	setDateAttributes(ret, &s);
	setSymbolicLinkDestinationAttribute(ret, &s, URL);

	objc_autoreleasePoolPop(pool);

	return ret;
}

- (void)of_setPOSIXPermissions: (OFNumber *)permissions
		   ofItemAtURL: (OFURL *)URL
		    attributes: (of_file_attributes_t)attributes
{
#ifdef OF_FILE_MANAGER_SUPPORTS_PERMISSIONS
	uint16_t mode = [permissions uInt16Value] & 0777;
	OFString *path = [URL fileSystemRepresentation];

# ifndef OF_WINDOWS
	if (chmod([path cStringWithEncoding: [OFLocale encoding]], mode) != 0)
# else
	if (_wchmod([path UTF16String], mode) != 0)
# endif
		@throw [OFSetItemAttributesFailedException
		    exceptionWithURL: URL
			  attributes: attributes
		     failedAttribute: of_file_attribute_key_posix_permissions
			       errNo: errno];
#else
	OF_UNRECOGNIZED_SELECTOR
#endif
}

- (void)of_setOwner: (OFString *)owner
	   andGroup: (OFString *)group
	ofItemAtURL: (OFURL *)URL
       attributeKey: (of_file_attribute_key_t)attributeKey
	 attributes: (of_file_attributes_t)attributes
{
#ifdef OF_FILE_MANAGER_SUPPORTS_OWNER
	OFString *path = [URL fileSystemRepresentation];
	uid_t uid = -1;
	gid_t gid = -1;
	of_string_encoding_t encoding;

	if (owner == nil && group == nil)
		@throw [OFInvalidArgumentException exception];

	encoding = [OFLocale encoding];

# ifdef OF_HAVE_THREADS
	[passwdMutex lock];
	@try {
# endif
		if (owner != nil) {
			struct passwd *passwd;

			if ((passwd = getpwnam([owner
			    cStringWithEncoding: encoding])) == NULL)
				@throw [OFSetItemAttributesFailedException
				    exceptionWithURL: URL
					  attributes: attributes
				     failedAttribute: attributeKey
					       errNo: errno];

			uid = passwd->pw_uid;
		}

		if (group != nil) {
			struct group *group_;

			if ((group_ = getgrnam([group
			    cStringWithEncoding: encoding])) == NULL)
				@throw [OFSetItemAttributesFailedException
				    exceptionWithURL: URL
					  attributes: attributes
				     failedAttribute: attributeKey
					       errNo: errno];

			gid = group_->gr_gid;
		}
# ifdef OF_HAVE_THREADS
	} @finally {
		[passwdMutex unlock];
	}
# endif

	if (chown([path cStringWithEncoding: encoding], uid, gid) != 0)
		@throw [OFSetItemAttributesFailedException
		    exceptionWithURL: URL
			  attributes: attributes
		     failedAttribute: attributeKey
			       errNo: errno];
#else
	OF_UNRECOGNIZED_SELECTOR
#endif
}

- (void)setAttributes: (of_file_attributes_t)attributes
	  ofItemAtURL: (OFURL *)URL
{
	void *pool = objc_autoreleasePoolPush();
	OFEnumerator OF_GENERIC(of_file_attribute_key_t) *keyEnumerator;
	OFEnumerator *objectEnumerator;
	of_file_attribute_key_t key;
	id object;

	if (URL == nil)
		@throw [OFInvalidArgumentException exception];

	if (![[URL scheme] isEqual: _scheme])
		@throw [OFInvalidArgumentException exception];

	keyEnumerator = [attributes keyEnumerator];
	objectEnumerator = [attributes objectEnumerator];

	while ((key = [keyEnumerator nextObject]) != nil &&
	    (object = [objectEnumerator nextObject]) != nil) {
		if ([key isEqual: of_file_attribute_key_posix_permissions])
			[self of_setPOSIXPermissions: object
					 ofItemAtURL: URL
					  attributes: attributes];
		else if ([key isEqual: of_file_attribute_key_owner])
			[self of_setOwner: object
				 andGroup: nil
			      ofItemAtURL: URL
			     attributeKey: key
			       attributes: attributes];
		else if ([key isEqual: of_file_attribute_key_group])
			[self of_setOwner: nil
				 andGroup: object
			      ofItemAtURL: URL
			     attributeKey: key
			       attributes: attributes];
		else
			@throw [OFInvalidArgumentException exception];
	}

	objc_autoreleasePoolPop(pool);
}

- (bool)fileExistsAtURL: (OFURL *)URL
{
	void *pool = objc_autoreleasePoolPush();
	of_stat_t s;
	bool ret;

	if (URL == nil)
		@throw [OFInvalidArgumentException exception];

	if (![[URL scheme] isEqual: _scheme])
		@throw [OFInvalidArgumentException exception];

	if (of_stat([URL fileSystemRepresentation], &s) == -1)
		return false;

	ret = S_ISREG(s.st_mode);

	objc_autoreleasePoolPop(pool);

	return ret;
}

- (bool)directoryExistsAtURL: (OFURL *)URL
{
	void *pool = objc_autoreleasePoolPush();
	of_stat_t s;
	bool ret;

	if (URL == nil)
		@throw [OFInvalidArgumentException exception];

	if (![[URL scheme] isEqual: _scheme])
		@throw [OFInvalidArgumentException exception];

	if (of_stat([URL fileSystemRepresentation], &s) == -1)
		return false;

	ret = S_ISDIR(s.st_mode);

	objc_autoreleasePoolPop(pool);

	return ret;
}

- (void)createDirectoryAtURL: (OFURL *)URL
{
	void *pool = objc_autoreleasePoolPush();
	OFString *path;

	if (URL == nil)
		@throw [OFInvalidArgumentException exception];

	if (![[URL scheme] isEqual: _scheme])
		@throw [OFInvalidArgumentException exception];

	path = [URL fileSystemRepresentation];

#if defined(OF_WINDOWS)
	if (_wmkdir([path UTF16String]) != 0)
		@throw [OFCreateDirectoryFailedException
		    exceptionWithURL: URL
			       errNo: errno];
#elif defined(OF_AMIGAOS)
	BPTR lock;

	if ((lock = CreateDir(
	    [path cStringWithEncoding: [OFLocale encoding]])) == 0) {
		int errNo;

		switch (IoErr()) {
		case ERROR_NO_FREE_STORE:
		case ERROR_DISK_FULL:
			errNo = ENOSPC;
			break;
		case ERROR_OBJECT_IN_USE:
		case ERROR_DISK_NOT_VALIDATED:
			errNo = EBUSY;
			break;
		case ERROR_OBJECT_EXISTS:
			errNo = EEXIST;
			break;
		case ERROR_OBJECT_NOT_FOUND:
			errNo = ENOENT;
			break;
		case ERROR_DISK_WRITE_PROTECTED:
			errNo = EROFS;
			break;
		default:
			errNo = 0;
			break;
		}

		@throw [OFCreateDirectoryFailedException
		    exceptionWithURL: URL
			       errNo: errNo];
	}

	UnLock(lock);
#else
	if (mkdir([path cStringWithEncoding: [OFLocale encoding]], 0777) != 0)
		@throw [OFCreateDirectoryFailedException
		    exceptionWithURL: URL
			       errNo: errno];
#endif

	objc_autoreleasePoolPop(pool);
}

- (OFArray OF_GENERIC(OFString *) *)contentsOfDirectoryAtURL: (OFURL *)URL
{
	OFMutableArray *files = [OFMutableArray array];
	void *pool = objc_autoreleasePoolPush();
	OFString *path;

	if (URL == nil)
		@throw [OFInvalidArgumentException exception];

	if (![[URL scheme] isEqual: _scheme])
		@throw [OFInvalidArgumentException exception];

	path = [URL fileSystemRepresentation];

#if defined(OF_WINDOWS)
	HANDLE handle;
	WIN32_FIND_DATAW fd;

	path = [path stringByAppendingString: @"\\*"];

	if ((handle = FindFirstFileW([path UTF16String],
	    &fd)) == INVALID_HANDLE_VALUE) {
		int errNo = 0;

		if (GetLastError() == ERROR_FILE_NOT_FOUND)
			errNo = ENOENT;

		@throw [OFOpenItemFailedException exceptionWithURL: URL
							      mode: nil
							     errNo: errNo];
	}

	@try {
		do {
			OFString *file;

			if (!wcscmp(fd.cFileName, L".") ||
			    !wcscmp(fd.cFileName, L".."))
				continue;

			file = [OFString stringWithUTF16String: fd.cFileName];
			@try {
				[files addObject: file];
			} @finally {
				[file release];
			}
		} while (FindNextFileW(handle, &fd));

		if (GetLastError() != ERROR_NO_MORE_FILES)
			@throw [OFReadFailedException exceptionWithObject: self
							  requestedLength: 0
								    errNo: EIO];
	} @finally {
		FindClose(handle);
	}
#elif defined(OF_AMIGAOS)
	of_string_encoding_t encoding = [OFLocale encoding];
	BPTR lock;

	if ((lock = Lock([path cStringWithEncoding: encoding],
	    SHARED_LOCK)) == 0) {
		int errNo;

		switch (IoErr()) {
		case ERROR_OBJECT_IN_USE:
		case ERROR_DISK_NOT_VALIDATED:
			errNo = EBUSY;
			break;
		case ERROR_OBJECT_NOT_FOUND:
			errNo = ENOENT;
			break;
		default:
			errNo = 0;
			break;
		}

		@throw [OFOpenItemFailedException exceptionWithURL: URL
							      mode: nil
							     errNo: errNo];
	}

	@try {
# ifdef OF_AMIGAOS4
		struct ExamineData *ed;
		APTR context;

		if ((context = ObtainDirContextTags(EX_FileLockInput, lock,
		    EX_DoCurrentDir, TRUE, EX_DataFields, EXF_NAME,
		    TAG_END)) == NULL)
			@throw [OFOpenItemFailedException
			    exceptionWithURL: URL
					mode: nil
				       errNo: 0];

		@try {
			while ((ed = ExamineDir(context)) != NULL) {
				OFString *file = [[OFString alloc]
				    initWithCString: ed->Name
					   encoding: encoding];

				@try {
					[files addObject: file];
				} @finally {
					[file release];
				}
			}
		} @finally {
			ReleaseDirContext(context);
		}
# else
		struct FileInfoBlock fib;

		if (!Examine(lock, &fib))
			@throw [OFOpenItemFailedException
			    exceptionWithURL: URL
					mode: nil
				       errNo: 0];

		while (ExNext(lock, &fib)) {
			OFString *file = [[OFString alloc]
			    initWithCString: fib.fib_FileName
				   encoding: encoding];

			@try {
				[files addObject: file];
			} @finally {
				[file release];
			}
		}
# endif

		if (IoErr() != ERROR_NO_MORE_ENTRIES)
			@throw [OFReadFailedException
			    exceptionWithObject: self
				requestedLength: 0
					  errNo: EIO];
	} @finally {
		UnLock(lock);
	}
#else
	of_string_encoding_t encoding = [OFLocale encoding];
	DIR *dir;

	if ((dir = opendir([path cStringWithEncoding: encoding])) == NULL)
		@throw [OFOpenItemFailedException exceptionWithURL: URL
							      mode: nil
							     errNo: errno];

# if !defined(HAVE_READDIR_R) && defined(OF_HAVE_THREADS)
	@try {
		[readdirMutex lock];
	} @catch (id e) {
		closedir(dir);
		@throw e;
	}
# endif

	@try {
		for (;;) {
			struct dirent *dirent;
# ifdef HAVE_READDIR_R
			struct dirent buffer;
# endif
			OFString *file;

# ifdef HAVE_READDIR_R
			if (readdir_r(dir, &buffer, &dirent) != 0)
				@throw [OFReadFailedException
				    exceptionWithObject: self
					requestedLength: 0
						  errNo: errno];

			if (dirent == NULL)
				break;
# else
			errno = 0;
			if ((dirent = readdir(dir)) == NULL) {
				if (errno == 0)
					break;
				else
					@throw [OFReadFailedException
					    exceptionWithObject: self
						requestedLength: 0
							  errNo: errno];
			}
# endif

			if (strcmp(dirent->d_name, ".") == 0 ||
			    strcmp(dirent->d_name, "..") == 0)
				continue;

			file = [[OFString alloc] initWithCString: dirent->d_name
							encoding: encoding];
			@try {
				[files addObject: file];
			} @finally {
				[file release];
			}
		}
	} @finally {
		closedir(dir);
# if !defined(HAVE_READDIR_R) && defined(OF_HAVE_THREADS)
		[readdirMutex unlock];
# endif
	}
#endif

	[files makeImmutable];

	objc_autoreleasePoolPop(pool);

	return files;
}

- (void)removeItemAtURL: (OFURL *)URL
{
	void *pool = objc_autoreleasePoolPush();
	OFString *path;
	of_stat_t s;

	if (URL == nil)
		@throw [OFInvalidArgumentException exception];

	if (![[URL scheme] isEqual: _scheme])
		@throw [OFInvalidArgumentException exception];

	path = [URL fileSystemRepresentation];

	if (of_lstat(path, &s) != 0)
		@throw [OFRemoveItemFailedException exceptionWithURL: URL
							       errNo: errno];

	if (S_ISDIR(s.st_mode)) {
		OFArray *contents;

		@try {
			contents = [self contentsOfDirectoryAtURL: URL];
		} @catch (id e) {
			/*
			 * Only convert exceptions to
			 * OFRemoveItemFailedException that have an errNo
			 * property. This covers all I/O related exceptions
			 * from the operations used to remove an item, all
			 * others should be left as is.
			 */
			if ([e respondsToSelector: @selector(errNo)])
				@throw [OFRemoveItemFailedException
				    exceptionWithURL: URL
					       errNo: [e errNo]];

			@throw e;
		}

		for (OFString *item in contents) {
			void *pool2 = objc_autoreleasePoolPush();

			[self removeItemAtURL: [OFURL fileURLWithPath:
			    [path stringByAppendingPathComponent: item]]];

			objc_autoreleasePoolPop(pool2);
		}

#ifndef OF_AMIGAOS
# ifndef OF_WINDOWS
		if (rmdir([path cStringWithEncoding: [OFLocale encoding]]) != 0)
# else
		if (_wrmdir([path UTF16String]) != 0)
# endif
			@throw [OFRemoveItemFailedException
				exceptionWithURL: URL
					   errNo: errno];
	} else {
# ifndef OF_WINDOWS
		if (unlink([path cStringWithEncoding:
		    [OFLocale encoding]]) != 0)
# else
		if (_wunlink([path UTF16String]) != 0)
# endif
			@throw [OFRemoveItemFailedException
			    exceptionWithURL: URL
				       errNo: errno];
#endif
	}

#ifdef OF_AMIGAOS
	if (!DeleteFile([path cStringWithEncoding: [OFLocale encoding]])) {
		int errNo;

		switch (IoErr()) {
		case ERROR_OBJECT_IN_USE:
		case ERROR_DISK_NOT_VALIDATED:
			errNo = EBUSY;
			break;
		case ERROR_OBJECT_NOT_FOUND:
			errNo = ENOENT;
			break;
		case ERROR_DISK_WRITE_PROTECTED:
			errNo = EROFS;
			break;
		case ERROR_DELETE_PROTECTED:
			errNo = EACCES;
			break;
		default:
			errNo = 0;
			break;
		}

		@throw [OFRemoveItemFailedException exceptionWithURL: URL
							       errNo: errNo];
	}
#endif

	objc_autoreleasePoolPop(pool);
}

#ifdef OF_FILE_MANAGER_SUPPORTS_LINKS
- (void)linkItemAtURL: (OFURL *)source
		toURL: (OFURL *)destination
{
	void *pool = objc_autoreleasePoolPush();
	OFString *sourcePath, *destinationPath;

	if (source == nil || destination == nil)
		@throw [OFInvalidArgumentException exception];

	if (![[source scheme] isEqual: _scheme] ||
	    ![[destination scheme] isEqual: _scheme])
		@throw [OFInvalidArgumentException exception];

	sourcePath = [source fileSystemRepresentation];
	destinationPath = [destination fileSystemRepresentation];

# ifndef OF_WINDOWS
	of_string_encoding_t encoding = [OFLocale encoding];

	if (link([sourcePath cStringWithEncoding: encoding],
	    [destinationPath cStringWithEncoding: encoding]) != 0)
		@throw [OFLinkFailedException
		    exceptionWithSourceURL: source
			    destinationURL: destination
				     errNo: errno];
# else
	if (!CreateHardLinkW([destinationPath UTF16String],
	    [sourcePath UTF16String], NULL))
		@throw [OFLinkFailedException
		    exceptionWithSourceURL: source
			    destinationURL: destination
				     errNo: 0];
# endif

	objc_autoreleasePoolPop(pool);
}
#endif

#ifdef OF_FILE_MANAGER_SUPPORTS_SYMLINKS
- (void)createSymbolicLinkAtURL: (OFURL *)URL
	    withDestinationPath: (OFString *)target
{
	void *pool = objc_autoreleasePoolPush();
	OFString *path;

	if (URL == nil || target == nil)
		@throw [OFInvalidArgumentException exception];

	if (![[URL scheme] isEqual: _scheme])
		@throw [OFInvalidArgumentException exception];

	path = [URL fileSystemRepresentation];

# ifndef OF_WINDOWS
	of_string_encoding_t encoding = [OFLocale encoding];

	if (symlink([target cStringWithEncoding: encoding],
	    [path cStringWithEncoding: encoding]) != 0)
		@throw [OFCreateSymbolicLinkFailedException
		    exceptionWithURL: URL
			      target: target
			       errNo: errno];
# else
	if (func_CreateSymbolicLinkW == NULL)
		@throw [OFNotImplementedException exceptionWithSelector: _cmd
								 object: self];

	if (!func_CreateSymbolicLinkW([path UTF16String],
	    [target UTF16String], 0))
		@throw [OFCreateSymbolicLinkFailedException
		    exceptionWithURL: URL
			      target: target
			       errNo: 0];
# endif

	objc_autoreleasePoolPop(pool);
}
#endif

- (bool)moveItemAtURL: (OFURL *)source
		toURL: (OFURL *)destination
{
	void *pool;

	if (![[source scheme] isEqual: _scheme] ||
	    ![[destination scheme] isEqual: _scheme])
		return false;

	if ([self fileExistsAtURL: destination])
		@throw [OFMoveItemFailedException
		    exceptionWithSourceURL: source
			    destinationURL: destination
				     errNo: EEXIST];

	pool = objc_autoreleasePoolPush();

#if defined(OF_WINDOWS)
	if (_wrename([[source fileSystemRepresentation] UTF16String],
	    [[destination fileSystemRepresentation] UTF16String]) != 0)
		@throw [OFMoveItemFailedException
		    exceptionWithSourceURL: source
			    destinationURL: destination
				     errNo: errno];
#elif defined(OF_AMIGAOS)
	of_string_encoding_t encoding = [OFLocale encoding];

	if (!Rename([[source fileSystemRepresentation]
	    cStringWithEncoding: encoding],
	    [[destination fileSystemRepresentation]
	    cStringWithEncoding: encoding])) {
		int errNo;

		switch (IoErr()) {
		case ERROR_RENAME_ACROSS_DEVICES:
			errNo = EXDEV;
			break;
		case ERROR_OBJECT_IN_USE:
		case ERROR_DISK_NOT_VALIDATED:
			errNo = EBUSY;
			break;
		case ERROR_OBJECT_EXISTS:
			errNo = EEXIST;
			break;
		case ERROR_OBJECT_NOT_FOUND:
			errNo = ENOENT;
			break;
		case ERROR_DISK_WRITE_PROTECTED:
			errNo = EROFS;
			break;
		default:
			errNo = 0;
			break;
		}

		@throw [OFMoveItemFailedException
		    exceptionWithSourceURL: source
			    destinationURL: destination
				     errNo: errNo];
	}
#else
	of_string_encoding_t encoding = [OFLocale encoding];

	if (rename([[source fileSystemRepresentation]
	    cStringWithEncoding: encoding],
	    [[destination fileSystemRepresentation]
	    cStringWithEncoding: encoding]) != 0)
		@throw [OFMoveItemFailedException
		    exceptionWithSourceURL: source
			    destinationURL: destination
				     errNo: errno];
#endif

	objc_autoreleasePoolPop(pool);

	return true;
}
@end