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FileManager.swift
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// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2018 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
#if os(Android) // struct stat.st_mode is UInt32
internal func &(left: UInt32, right: mode_t) -> mode_t {
return mode_t(left) & right
}
#endif
import CoreFoundation
open class FileManager : NSObject {
/* Returns the default singleton instance.
*/
private static let _default = FileManager()
open class var `default`: FileManager {
get {
return _default
}
}
/// Returns an array of URLs that identify the mounted volumes available on the device.
open func mountedVolumeURLs(includingResourceValuesForKeys propertyKeys: [URLResourceKey]?, options: VolumeEnumerationOptions = []) -> [URL]? {
var urls: [URL]
#if os(Linux)
guard let procMounts = try? String(contentsOfFile: "/proc/mounts", encoding: .utf8) else {
return nil
}
urls = []
for line in procMounts.components(separatedBy: "\n") {
let mountPoint = line.components(separatedBy: " ")
if mountPoint.count > 2 {
urls.append(URL(fileURLWithPath: mountPoint[1], isDirectory: true))
}
}
#elseif canImport(Darwin)
func mountPoints(_ statBufs: UnsafePointer<statfs>, _ fsCount: Int) -> [URL] {
var urls: [URL] = []
for fsIndex in 0..<fsCount {
var fs = statBufs.advanced(by: fsIndex).pointee
if options.contains(.skipHiddenVolumes) && fs.f_flags & UInt32(MNT_DONTBROWSE) != 0 {
continue
}
let mountPoint = withUnsafePointer(to: &fs.f_mntonname.0) { (ptr: UnsafePointer<Int8>) -> String in
return string(withFileSystemRepresentation: ptr, length: strlen(ptr))
}
urls.append(URL(fileURLWithPath: mountPoint, isDirectory: true))
}
return urls
}
if #available(OSX 10.13, *) {
var statBufPtr: UnsafeMutablePointer<statfs>?
let fsCount = getmntinfo_r_np(&statBufPtr, MNT_WAIT)
guard let statBuf = statBufPtr, fsCount > 0 else {
return nil
}
urls = mountPoints(statBuf, Int(fsCount))
free(statBufPtr)
} else {
var fsCount = getfsstat(nil, 0, MNT_WAIT)
guard fsCount > 0 else {
return nil
}
let statBuf = UnsafeMutablePointer<statfs>.allocate(capacity: Int(fsCount))
defer { statBuf.deallocate() }
fsCount = getfsstat(statBuf, fsCount * Int32(MemoryLayout<statfs>.stride), MNT_WAIT)
guard fsCount > 0 else {
return nil
}
urls = mountPoints(statBuf, Int(fsCount))
}
#else
#error("Requires a platform-specific implementation")
#endif
return urls
}
/* Returns an NSArray of NSURLs identifying the the directory entries.
If the directory contains no entries, this method will return the empty array. When an array is specified for the 'keys' parameter, the specified property values will be pre-fetched and cached with each enumerated URL.
This method always does a shallow enumeration of the specified directory (i.e. it always acts as if NSDirectoryEnumerationSkipsSubdirectoryDescendants has been specified). If you need to perform a deep enumeration, use -[NSFileManager enumeratorAtURL:includingPropertiesForKeys:options:errorHandler:].
If you wish to only receive the URLs and no other attributes, then pass '0' for 'options' and an empty NSArray ('[NSArray array]') for 'keys'. If you wish to have the property caches of the vended URLs pre-populated with a default set of attributes, then pass '0' for 'options' and 'nil' for 'keys'.
*/
open func contentsOfDirectory(at url: URL, includingPropertiesForKeys keys: [URLResourceKey]?, options mask: DirectoryEnumerationOptions = []) throws -> [URL] {
var error : Error? = nil
let e = self.enumerator(at: url, includingPropertiesForKeys: keys, options: mask.union(.skipsSubdirectoryDescendants)) { (url, err) -> Bool in
error = err
return false
}
var result = [URL]()
if let e = e {
for url in e {
result.append(url as! URL)
}
if let error = error {
throw error
}
}
return result
}
private enum _SearchPathDomain {
case system
case local
case network
case user
static let correspondingValues: [UInt: _SearchPathDomain] = [
SearchPathDomainMask.systemDomainMask.rawValue: .system,
SearchPathDomainMask.localDomainMask.rawValue: .local,
SearchPathDomainMask.networkDomainMask.rawValue: .network,
SearchPathDomainMask.userDomainMask.rawValue: .user,
]
static let searchOrder: [SearchPathDomainMask] = [
.systemDomainMask,
.localDomainMask,
.networkDomainMask,
.userDomainMask,
]
init?(_ domainMask: SearchPathDomainMask) {
if let value = _SearchPathDomain.correspondingValues[domainMask.rawValue] {
self = value
} else {
return nil
}
}
static func allInSearchOrder(from domainMask: SearchPathDomainMask) -> [_SearchPathDomain] {
var domains: [_SearchPathDomain] = []
for bit in _SearchPathDomain.searchOrder {
if domainMask.contains(bit) {
domains.append(_SearchPathDomain.correspondingValues[bit.rawValue]!)
}
}
return domains
}
}
private func darwinPathURLs(for domain: _SearchPathDomain, system: String?, local: String?, network: String?, userHomeSubpath: String?) -> [URL] {
switch domain {
case .system:
guard let path = system else { return [] }
return [ URL(fileURLWithPath: path, isDirectory: true) ]
case .local:
guard let path = local else { return [] }
return [ URL(fileURLWithPath: path, isDirectory: true) ]
case .network:
guard let path = network else { return [] }
return [ URL(fileURLWithPath: path, isDirectory: true) ]
case .user:
guard let path = userHomeSubpath else { return [] }
return [ URL(fileURLWithPath: path, isDirectory: true, relativeTo: URL(fileURLWithPath: NSHomeDirectory(), isDirectory: true)) ]
}
}
private func darwinPathURLs(for domain: _SearchPathDomain, all: String, useLocalDirectoryForSystem: Bool = false) -> [URL] {
switch domain {
case .system:
return [ URL(fileURLWithPath: useLocalDirectoryForSystem ? "/\(all)" : "/System/\(all)", isDirectory: true) ]
case .local:
return [ URL(fileURLWithPath: "/\(all)", isDirectory: true) ]
case .network:
return [ URL(fileURLWithPath: "/Network/\(all)", isDirectory: true) ]
case .user:
return [ URL(fileURLWithPath: all, isDirectory: true, relativeTo: URL(fileURLWithPath: NSHomeDirectory(), isDirectory: true)) ]
}
}
#if os(Windows) // Non-Apple OSes that do not implement FHS/XDG are not currently supported.
@available(*, unavailable, message: "Not implemented for this OS")
open func urls(for directory: SearchPathDirectory, in domainMask: SearchPathDomainMask) -> [URL] {
NSUnimplemented()
}
#else
/* -URLsForDirectory:inDomains: is analogous to NSSearchPathForDirectoriesInDomains(), but returns an array of NSURL instances for use with URL-taking APIs. This API is suitable when you need to search for a file or files which may live in one of a variety of locations in the domains specified.
*/
open func urls(for directory: SearchPathDirectory, in domainMask: SearchPathDomainMask) -> [URL] {
let domains = _SearchPathDomain.allInSearchOrder(from: domainMask)
// We are going to return appropriate paths on Darwin, but [] on platforms that do not have comparable locations.
// For example, on FHS/XDG systems, applications are not installed in a single path.
let useDarwinPaths: Bool
if let envVar = ProcessInfo.processInfo.environment["_NSFileManagerUseXDGPathsForDirectoryDomains"] {
useDarwinPaths = !NSString(string: envVar).boolValue
} else {
#if canImport(Darwin)
useDarwinPaths = true
#else
useDarwinPaths = false
#endif
}
var urls: [URL] = []
for domain in domains {
if useDarwinPaths {
urls.append(contentsOf: darwinURLs(for: directory, in: domain))
} else {
urls.append(contentsOf: xdgURLs(for: directory, in: domain))
}
}
return urls
}
#endif
private lazy var xdgHomeDirectory: String = {
let key = "HOME="
if let contents = try? String(contentsOfFile: "/etc/default/useradd", encoding: .utf8) {
for line in contents.components(separatedBy: "\n") {
if line.hasPrefix(key) {
let index = line.index(line.startIndex, offsetBy: key.count)
let str = String(line[index...]) as NSString
let homeDir = str.trimmingCharacters(in: CharacterSet.whitespaces)
if homeDir.count > 0 {
return homeDir
}
}
}
}
return "/home"
}()
private func xdgURLs(for directory: SearchPathDirectory, in domain: _SearchPathDomain) -> [URL] {
// FHS/XDG-compliant OSes:
switch directory {
case .autosavedInformationDirectory:
let runtimePath = __SwiftValue.fetch(nonOptional: _CFXDGCreateDataHomePath()) as! String
return [ URL(fileURLWithPath: "Autosave Information", isDirectory: true, relativeTo: URL(fileURLWithPath: runtimePath, isDirectory: true)) ]
case .desktopDirectory:
guard domain == .user else { return [] }
return [ _XDGUserDirectory.desktop.url ]
case .documentDirectory:
guard domain == .user else { return [] }
return [ _XDGUserDirectory.documents.url ]
case .cachesDirectory:
guard domain == .user else { return [] }
let path = __SwiftValue.fetch(nonOptional: _CFXDGCreateCacheDirectoryPath()) as! String
return [ URL(fileURLWithPath: path, isDirectory: true) ]
case .applicationSupportDirectory:
guard domain == .user else { return [] }
let path = __SwiftValue.fetch(nonOptional: _CFXDGCreateDataHomePath()) as! String
return [ URL(fileURLWithPath: path, isDirectory: true) ]
case .downloadsDirectory:
guard domain == .user else { return [] }
return [ _XDGUserDirectory.download.url ]
case .userDirectory:
guard domain == .local else { return [] }
return [ URL(fileURLWithPath: xdgHomeDirectory, isDirectory: true) ]
case .moviesDirectory:
return [ _XDGUserDirectory.videos.url ]
case .musicDirectory:
guard domain == .user else { return [] }
return [ _XDGUserDirectory.music.url ]
case .picturesDirectory:
guard domain == .user else { return [] }
return [ _XDGUserDirectory.pictures.url ]
case .sharedPublicDirectory:
guard domain == .user else { return [] }
return [ _XDGUserDirectory.publicShare.url ]
case .trashDirectory:
let userTrashURL = URL(fileURLWithPath: ".Trash", isDirectory: true, relativeTo: URL(fileURLWithPath: NSHomeDirectory(), isDirectory: true))
if domain == .user || domain == .local {
return [ userTrashURL ]
} else {
return []
}
// None of these are supported outside of Darwin:
case .applicationDirectory:
fallthrough
case .demoApplicationDirectory:
fallthrough
case .developerApplicationDirectory:
fallthrough
case .adminApplicationDirectory:
fallthrough
case .libraryDirectory:
fallthrough
case .developerDirectory:
fallthrough
case .documentationDirectory:
fallthrough
case .coreServiceDirectory:
fallthrough
case .inputMethodsDirectory:
fallthrough
case .preferencePanesDirectory:
fallthrough
case .applicationScriptsDirectory:
fallthrough
case .allApplicationsDirectory:
fallthrough
case .allLibrariesDirectory:
fallthrough
case .printerDescriptionDirectory:
fallthrough
case .itemReplacementDirectory:
return []
}
}
private func darwinURLs(for directory: SearchPathDirectory, in domain: _SearchPathDomain) -> [URL] {
switch directory {
case .applicationDirectory:
return darwinPathURLs(for: domain, all: "Applications", useLocalDirectoryForSystem: true)
case .demoApplicationDirectory:
return darwinPathURLs(for: domain, all: "Demos", useLocalDirectoryForSystem: true)
case .developerApplicationDirectory:
return darwinPathURLs(for: domain, all: "Developer/Applications", useLocalDirectoryForSystem: true)
case .adminApplicationDirectory:
return darwinPathURLs(for: domain, all: "Applications/Utilities", useLocalDirectoryForSystem: true)
case .libraryDirectory:
return darwinPathURLs(for: domain, all: "Library")
case .developerDirectory:
return darwinPathURLs(for: domain, all: "Developer", useLocalDirectoryForSystem: true)
case .documentationDirectory:
return darwinPathURLs(for: domain, all: "Library/Documentation")
case .coreServiceDirectory:
return darwinPathURLs(for: domain, system: "/System/Library/CoreServices", local: nil, network: nil, userHomeSubpath: nil)
case .autosavedInformationDirectory:
return darwinPathURLs(for: domain, system: nil, local: nil, network: nil, userHomeSubpath: "Library/Autosave Information")
case .inputMethodsDirectory:
return darwinPathURLs(for: domain, all: "Library/Input Methods")
case .preferencePanesDirectory:
return darwinPathURLs(for: domain, system: "/System/Library/PreferencePanes", local: "/Library/PreferencePanes", network: nil, userHomeSubpath: "Library/PreferencePanes")
case .applicationScriptsDirectory:
// Only the ObjC Foundation can know where this is.
return []
case .allApplicationsDirectory:
var directories: [URL] = []
directories.append(contentsOf: darwinPathURLs(for: domain, all: "Applications", useLocalDirectoryForSystem: true))
directories.append(contentsOf: darwinPathURLs(for: domain, all: "Demos", useLocalDirectoryForSystem: true))
directories.append(contentsOf: darwinPathURLs(for: domain, all: "Developer/Applications", useLocalDirectoryForSystem: true))
directories.append(contentsOf: darwinPathURLs(for: domain, all: "Applications/Utilities", useLocalDirectoryForSystem: true))
return directories
case .allLibrariesDirectory:
var directories: [URL] = []
directories.append(contentsOf: darwinPathURLs(for: domain, all: "Library"))
directories.append(contentsOf: darwinPathURLs(for: domain, all: "Developer"))
return directories
case .printerDescriptionDirectory:
guard domain == .system else { return [] }
return [ URL(fileURLWithPath: "/System/Library/Printers/PPD", isDirectory: true) ]
case .desktopDirectory:
guard domain == .user else { return [] }
return [ URL(fileURLWithPath: "Desktop", isDirectory: true, relativeTo: URL(fileURLWithPath: NSHomeDirectory(), isDirectory: true)) ]
case .documentDirectory:
guard domain == .user else { return [] }
return [ URL(fileURLWithPath: "Documents", isDirectory: true, relativeTo: URL(fileURLWithPath: NSHomeDirectory(), isDirectory: true)) ]
case .cachesDirectory:
guard domain == .user else { return [] }
return [ URL(fileURLWithPath: "Library/Caches", isDirectory: true, relativeTo: URL(fileURLWithPath: NSHomeDirectory(), isDirectory: true)) ]
case .applicationSupportDirectory:
guard domain == .user else { return [] }
return [ URL(fileURLWithPath: "Library/Application Support", isDirectory: true, relativeTo: URL(fileURLWithPath: NSHomeDirectory(), isDirectory: true)) ]
case .downloadsDirectory:
guard domain == .user else { return [] }
return [ URL(fileURLWithPath: "Downloads", isDirectory: true, relativeTo: URL(fileURLWithPath: NSHomeDirectory(), isDirectory: true)) ]
case .userDirectory:
return darwinPathURLs(for: domain, system: nil, local: "/Users", network: "/Network/Users", userHomeSubpath: nil)
case .moviesDirectory:
guard domain == .user else { return [] }
return [ URL(fileURLWithPath: "Movies", isDirectory: true, relativeTo: URL(fileURLWithPath: NSHomeDirectory(), isDirectory: true)) ]
case .musicDirectory:
guard domain == .user else { return [] }
return [ URL(fileURLWithPath: "Music", isDirectory: true, relativeTo: URL(fileURLWithPath: NSHomeDirectory(), isDirectory: true)) ]
case .picturesDirectory:
guard domain == .user else { return [] }
return [ URL(fileURLWithPath: "Pictures", isDirectory: true, relativeTo: URL(fileURLWithPath: NSHomeDirectory(), isDirectory: true)) ]
case .sharedPublicDirectory:
guard domain == .user else { return [] }
return [ URL(fileURLWithPath: "Public", isDirectory: true, relativeTo: URL(fileURLWithPath: NSHomeDirectory(), isDirectory: true)) ]
case .trashDirectory:
let userTrashURL = URL(fileURLWithPath: ".Trash", isDirectory: true, relativeTo: URL(fileURLWithPath: NSHomeDirectory(), isDirectory: true))
if domain == .user || domain == .local {
return [ userTrashURL ]
} else {
return []
}
case .itemReplacementDirectory:
// This directory is only returned by url(for:in:appropriateFor:create:)
return []
}
}
private enum URLForDirectoryError: Error {
case directoryUnknown
}
/* -URLForDirectory:inDomain:appropriateForURL:create:error: is a URL-based replacement for FSFindFolder(). It allows for the specification and (optional) creation of a specific directory for a particular purpose (e.g. the replacement of a particular item on disk, or a particular Library directory.
You may pass only one of the values from the NSSearchPathDomainMask enumeration, and you may not pass NSAllDomainsMask.
*/
open func url(for directory: SearchPathDirectory, in domain: SearchPathDomainMask, appropriateFor url: URL?, create shouldCreate: Bool) throws -> URL {
let urls = self.urls(for: directory, in: domain)
guard let url = urls.first else {
// On Apple OSes, this case returns nil without filling in the error parameter; Swift then synthesizes an error rather than trap.
// We simulate that behavior by throwing a private error.
throw URLForDirectoryError.directoryUnknown
}
if shouldCreate {
var attributes: [FileAttributeKey : Any] = [:]
switch _SearchPathDomain(domain) {
case .some(.user):
attributes[.posixPermissions] = 0700
case .some(.system):
attributes[.posixPermissions] = 0755
attributes[.ownerAccountID] = 0 // root
#if os(macOS) || os(iOS) || os(watchOS) || os(tvOS)
attributes[.ownerAccountID] = 80 // on Darwin, the admin group's fixed ID.
#endif
default:
break
}
try createDirectory(at: url, withIntermediateDirectories: true, attributes: attributes)
}
return url
}
/* Sets 'outRelationship' to NSURLRelationshipContains if the directory at 'directoryURL' directly or indirectly contains the item at 'otherURL', meaning 'directoryURL' is found while enumerating parent URLs starting from 'otherURL'. Sets 'outRelationship' to NSURLRelationshipSame if 'directoryURL' and 'otherURL' locate the same item, meaning they have the same NSURLFileResourceIdentifierKey value. If 'directoryURL' is not a directory, or does not contain 'otherURL' and they do not locate the same file, then sets 'outRelationship' to NSURLRelationshipOther. If an error occurs, returns NO and sets 'error'.
*/
open func getRelationship(_ outRelationship: UnsafeMutablePointer<URLRelationship>, ofDirectoryAt directoryURL: URL, toItemAt otherURL: URL) throws {
NSUnimplemented()
}
/* Similar to -[NSFileManager getRelationship:ofDirectoryAtURL:toItemAtURL:error:], except that the directory is instead defined by an NSSearchPathDirectory and NSSearchPathDomainMask. Pass 0 for domainMask to instruct the method to automatically choose the domain appropriate for 'url'. For example, to discover if a file is contained by a Trash directory, call [fileManager getRelationship:&result ofDirectory:NSTrashDirectory inDomain:0 toItemAtURL:url error:&error].
*/
open func getRelationship(_ outRelationship: UnsafeMutablePointer<URLRelationship>, of directory: SearchPathDirectory, in domainMask: SearchPathDomainMask, toItemAt url: URL) throws {
NSUnimplemented()
}
/* createDirectoryAtURL:withIntermediateDirectories:attributes:error: creates a directory at the specified URL. If you pass 'NO' for withIntermediateDirectories, the directory must not exist at the time this call is made. Passing 'YES' for withIntermediateDirectories will create any necessary intermediate directories. This method returns YES if all directories specified in 'url' were created and attributes were set. Directories are created with attributes specified by the dictionary passed to 'attributes'. If no dictionary is supplied, directories are created according to the umask of the process. This method returns NO if a failure occurs at any stage of the operation. If an error parameter was provided, a presentable NSError will be returned by reference.
*/
open func createDirectory(at url: URL, withIntermediateDirectories createIntermediates: Bool, attributes: [FileAttributeKey : Any]? = [:]) throws {
guard url.isFileURL else {
throw NSError(domain: NSCocoaErrorDomain, code: CocoaError.fileWriteUnsupportedScheme.rawValue, userInfo: [NSURLErrorKey : url])
}
try self.createDirectory(atPath: url.path, withIntermediateDirectories: createIntermediates, attributes: attributes)
}
/* createSymbolicLinkAtURL:withDestinationURL:error: returns YES if the symbolic link that point at 'destURL' was able to be created at the location specified by 'url'. 'destURL' is always resolved against its base URL, if it has one. If 'destURL' has no base URL and it's 'relativePath' is indeed a relative path, then a relative symlink will be created. If this method returns NO, the link was unable to be created and an NSError will be returned by reference in the 'error' parameter. This method does not traverse a terminal symlink.
*/
open func createSymbolicLink(at url: URL, withDestinationURL destURL: URL) throws {
guard url.isFileURL else {
throw NSError(domain: NSCocoaErrorDomain, code: CocoaError.fileWriteUnsupportedScheme.rawValue, userInfo: [NSURLErrorKey : url])
}
guard destURL.scheme == nil || destURL.isFileURL else {
throw NSError(domain: NSCocoaErrorDomain, code: CocoaError.fileWriteUnsupportedScheme.rawValue, userInfo: [NSURLErrorKey : destURL])
}
try self.createSymbolicLink(atPath: url.path, withDestinationPath: destURL.path)
}
/* Instances of FileManager may now have delegates. Each instance has one delegate, and the delegate is not retained. In versions of Mac OS X prior to 10.5, the behavior of calling [[NSFileManager alloc] init] was undefined. In Mac OS X 10.5 "Leopard" and later, calling [[NSFileManager alloc] init] returns a new instance of an FileManager.
*/
open weak var delegate: FileManagerDelegate?
/* setAttributes:ofItemAtPath:error: returns YES when the attributes specified in the 'attributes' dictionary are set successfully on the item specified by 'path'. If this method returns NO, a presentable NSError will be provided by-reference in the 'error' parameter. If no error is required, you may pass 'nil' for the error.
This method replaces changeFileAttributes:atPath:.
*/
open func setAttributes(_ attributes: [FileAttributeKey : Any], ofItemAtPath path: String) throws {
for attribute in attributes.keys {
if attribute == .posixPermissions {
guard let number = attributes[attribute] as? NSNumber else {
fatalError("Can't set file permissions to \(attributes[attribute] as Any?)")
}
#if os(macOS) || os(iOS)
let modeT = number.uint16Value
#elseif os(Linux) || os(Android) || CYGWIN
let modeT = number.uint32Value
#endif
try _fileSystemRepresentation(withPath: path, {
guard chmod($0, mode_t(modeT)) == 0 else {
throw _NSErrorWithErrno(errno, reading: false, path: path)
}
})
} else {
fatalError("Attribute type not implemented: \(attribute)")
}
}
}
/* createDirectoryAtPath:withIntermediateDirectories:attributes:error: creates a directory at the specified path. If you pass 'NO' for createIntermediates, the directory must not exist at the time this call is made. Passing 'YES' for 'createIntermediates' will create any necessary intermediate directories. This method returns YES if all directories specified in 'path' were created and attributes were set. Directories are created with attributes specified by the dictionary passed to 'attributes'. If no dictionary is supplied, directories are created according to the umask of the process. This method returns NO if a failure occurs at any stage of the operation. If an error parameter was provided, a presentable NSError will be returned by reference.
This method replaces createDirectoryAtPath:attributes:
*/
open func createDirectory(atPath path: String, withIntermediateDirectories createIntermediates: Bool, attributes: [FileAttributeKey : Any]? = [:]) throws {
try _fileSystemRepresentation(withPath: path, { pathFsRep in
if createIntermediates {
var isDir: ObjCBool = false
if !fileExists(atPath: path, isDirectory: &isDir) {
let parent = path._nsObject.deletingLastPathComponent
if !parent.isEmpty && !fileExists(atPath: parent, isDirectory: &isDir) {
try createDirectory(atPath: parent, withIntermediateDirectories: true, attributes: attributes)
}
if mkdir(pathFsRep, S_IRWXU | S_IRWXG | S_IRWXO) != 0 {
throw _NSErrorWithErrno(errno, reading: false, path: path)
} else if let attr = attributes {
try self.setAttributes(attr, ofItemAtPath: path)
}
} else if isDir.boolValue {
return
} else {
throw _NSErrorWithErrno(EEXIST, reading: false, path: path)
}
} else {
if mkdir(pathFsRep, S_IRWXU | S_IRWXG | S_IRWXO) != 0 {
throw _NSErrorWithErrno(errno, reading: false, path: path)
} else if let attr = attributes {
try self.setAttributes(attr, ofItemAtPath: path)
}
}
})
}
private func _contentsOfDir(atPath path: String, _ closure: (String, Int32) throws -> () ) throws {
let fsRep = fileSystemRepresentation(withPath: path)
defer { fsRep.deallocate() }
guard let dir = opendir(fsRep) else {
throw NSError(domain: NSCocoaErrorDomain, code: CocoaError.fileReadNoSuchFile.rawValue,
userInfo: [NSFilePathErrorKey: path, "NSUserStringVariant": NSArray(object: "Folder")])
}
defer { closedir(dir) }
var entry = dirent()
var result: UnsafeMutablePointer<dirent>? = nil
while readdir_r(dir, &entry, &result) == 0 {
guard result != nil else {
return
}
let length = Int(_direntNameLength(&entry))
let entryName = withUnsafePointer(to: &entry.d_name) { (ptr) -> String in
let namePtr = UnsafeRawPointer(ptr).assumingMemoryBound(to: CChar.self)
return string(withFileSystemRepresentation: namePtr, length: length)
}
if entryName != "." && entryName != ".." {
let entryType = Int32(entry.d_type)
try closure(entryName, entryType)
}
}
}
/**
Performs a shallow search of the specified directory and returns the paths of any contained items.
This method performs a shallow search of the directory and therefore does not traverse symbolic links or return the contents of any subdirectories. This method also does not return URLs for the current directory (“.”), parent directory (“..”) but it does return other hidden files (files that begin with a period character).
The order of the files in the returned array is undefined.
- Parameter path: The path to the directory whose contents you want to enumerate.
- Throws: `NSError` if the directory does not exist, this error is thrown with the associated error code.
- Returns: An array of String each of which identifies a file, directory, or symbolic link contained in `path`. The order of the files returned is undefined.
*/
open func contentsOfDirectory(atPath path: String) throws -> [String] {
var contents: [String] = []
try _contentsOfDir(atPath: path, { (entryName, entryType) throws in
contents.append(entryName)
})
return contents
}
/**
Performs a deep enumeration of the specified directory and returns the paths of all of the contained subdirectories.
This method recurses the specified directory and its subdirectories. The method skips the “.” and “..” directories at each level of the recursion.
Because this method recurses the directory’s contents, you might not want to use it in performance-critical code. Instead, consider using the enumeratorAtURL:includingPropertiesForKeys:options:errorHandler: or enumeratorAtPath: method to enumerate the directory contents yourself. Doing so gives you more control over the retrieval of items and more opportunities to abort the enumeration or perform other tasks at the same time.
- Parameter path: The path of the directory to list.
- Throws: `NSError` if the directory does not exist, this error is thrown with the associated error code.
- Returns: An array of NSString objects, each of which contains the path of an item in the directory specified by path. If path is a symbolic link, this method traverses the link. This method returns nil if it cannot retrieve the device of the linked-to file.
*/
open func subpathsOfDirectory(atPath path: String) throws -> [String] {
var contents: [String] = []
try _contentsOfDir(atPath: path, { (entryName, entryType) throws in
contents.append(entryName)
if entryType == DT_DIR {
let subPath: String = path + "/" + entryName
let entries = try subpathsOfDirectory(atPath: subPath)
contents.append(contentsOf: entries.map({file in "\(entryName)/\(file)"}))
}
})
return contents
}
/* attributesOfItemAtPath:error: returns an NSDictionary of key/value pairs containing the attributes of the item (file, directory, symlink, etc.) at the path in question. If this method returns 'nil', an NSError will be returned by reference in the 'error' parameter. This method does not traverse a terminal symlink.
This method replaces fileAttributesAtPath:traverseLink:.
*/
open func attributesOfItem(atPath path: String) throws -> [FileAttributeKey : Any] {
let s = try _lstatFile(atPath: path)
var result = [FileAttributeKey : Any]()
result[.size] = NSNumber(value: UInt64(s.st_size))
#if os(macOS) || os(iOS)
let ti = (TimeInterval(s.st_mtimespec.tv_sec) - kCFAbsoluteTimeIntervalSince1970) + (1.0e-9 * TimeInterval(s.st_mtimespec.tv_nsec))
#elseif os(Android)
let ti = (TimeInterval(s.st_mtime) - kCFAbsoluteTimeIntervalSince1970) + (1.0e-9 * TimeInterval(s.st_mtime_nsec))
#else
let ti = (TimeInterval(s.st_mtim.tv_sec) - kCFAbsoluteTimeIntervalSince1970) + (1.0e-9 * TimeInterval(s.st_mtim.tv_nsec))
#endif
result[.modificationDate] = Date(timeIntervalSinceReferenceDate: ti)
result[.posixPermissions] = NSNumber(value: UInt64(s.st_mode & 0o7777))
result[.referenceCount] = NSNumber(value: UInt64(s.st_nlink))
result[.systemNumber] = NSNumber(value: UInt64(s.st_dev))
result[.systemFileNumber] = NSNumber(value: UInt64(s.st_ino))
if let pwd = getpwuid(s.st_uid), pwd.pointee.pw_name != nil {
let name = String(cString: pwd.pointee.pw_name)
result[.ownerAccountName] = name
}
if let grd = getgrgid(s.st_gid), grd.pointee.gr_name != nil {
let name = String(cString: grd.pointee.gr_name)
result[.groupOwnerAccountName] = name
}
let type = FileAttributeType(statMode: s.st_mode)
result[.type] = type
if type == .typeBlockSpecial || type == .typeCharacterSpecial {
result[.deviceIdentifier] = NSNumber(value: UInt64(s.st_rdev))
}
#if os(macOS) || os(iOS)
if (s.st_flags & UInt32(UF_IMMUTABLE | SF_IMMUTABLE)) != 0 {
result[.immutable] = NSNumber(value: true)
}
if (s.st_flags & UInt32(UF_APPEND | SF_APPEND)) != 0 {
result[.appendOnly] = NSNumber(value: true)
}
#endif
result[.ownerAccountID] = NSNumber(value: UInt64(s.st_uid))
result[.groupOwnerAccountID] = NSNumber(value: UInt64(s.st_gid))
return result
}
/* attributesOfFileSystemForPath:error: returns an NSDictionary of key/value pairs containing the attributes of the filesystem containing the provided path. If this method returns 'nil', an NSError will be returned by reference in the 'error' parameter. This method does not traverse a terminal symlink.
This method replaces fileSystemAttributesAtPath:.
*/
#if os(Android)
@available(*, unavailable, message: "Unsuppported on this platform")
open func attributesOfFileSystem(forPath path: String) throws -> [FileAttributeKey : Any] {
NSUnsupported()
}
#else
open func attributesOfFileSystem(forPath path: String) throws -> [FileAttributeKey : Any] {
// statvfs(2) doesn't support 64bit inode on Darwin (apfs), fallback to statfs(2)
#if os(macOS) || os(iOS)
var s = statfs()
guard statfs(path, &s) == 0 else {
throw _NSErrorWithErrno(errno, reading: true, path: path)
}
#else
var s = statvfs()
guard statvfs(path, &s) == 0 else {
throw _NSErrorWithErrno(errno, reading: true, path: path)
}
#endif
var result = [FileAttributeKey : Any]()
#if os(macOS) || os(iOS)
let blockSize = UInt64(s.f_bsize)
result[.systemNumber] = NSNumber(value: UInt64(s.f_fsid.val.0))
#else
let blockSize = UInt64(s.f_frsize)
result[.systemNumber] = NSNumber(value: UInt64(s.f_fsid))
#endif
result[.systemSize] = NSNumber(value: blockSize * UInt64(s.f_blocks))
result[.systemFreeSize] = NSNumber(value: blockSize * UInt64(s.f_bavail))
result[.systemNodes] = NSNumber(value: UInt64(s.f_files))
result[.systemFreeNodes] = NSNumber(value: UInt64(s.f_ffree))
return result
}
#endif
/* createSymbolicLinkAtPath:withDestination:error: returns YES if the symbolic link that point at 'destPath' was able to be created at the location specified by 'path'. If this method returns NO, the link was unable to be created and an NSError will be returned by reference in the 'error' parameter. This method does not traverse a terminal symlink.
This method replaces createSymbolicLinkAtPath:pathContent:
*/
open func createSymbolicLink(atPath path: String, withDestinationPath destPath: String) throws {
try _fileSystemRepresentation(withPath: path, andPath: destPath, {
guard symlink($1, $0) == 0 else {
throw _NSErrorWithErrno(errno, reading: false, path: path)
}
})
}
/* destinationOfSymbolicLinkAtPath:error: returns a String containing the path of the item pointed at by the symlink specified by 'path'. If this method returns 'nil', an NSError will be thrown.
This method replaces pathContentOfSymbolicLinkAtPath:
*/
open func destinationOfSymbolicLink(atPath path: String) throws -> String {
let bufSize = Int(PATH_MAX + 1)
var buf = [Int8](repeating: 0, count: bufSize)
let len = _fileSystemRepresentation(withPath: path) {
readlink($0, &buf, bufSize)
}
if len < 0 {
throw _NSErrorWithErrno(errno, reading: true, path: path)
}
return self.string(withFileSystemRepresentation: buf, length: Int(len))
}
private func _readFrom(fd: Int32, toBuffer buffer: UnsafeMutablePointer<UInt8>, length bytesToRead: Int, filename: String) throws -> Int {
var bytesRead = 0
repeat {
bytesRead = numericCast(read(fd, buffer, numericCast(bytesToRead)))
} while bytesRead < 0 && errno == EINTR
guard bytesRead >= 0 else {
throw _NSErrorWithErrno(errno, reading: true, path: filename)
}
return bytesRead
}
private func _writeTo(fd: Int32, fromBuffer buffer : UnsafeMutablePointer<UInt8>, length bytesToWrite: Int, filename: String) throws {
var bytesWritten = 0
while bytesWritten < bytesToWrite {
var written = 0
let bytesLeftToWrite = bytesToWrite - bytesWritten
repeat {
written =
numericCast(write(fd, buffer.advanced(by: bytesWritten),
numericCast(bytesLeftToWrite)))
} while written < 0 && errno == EINTR
guard written >= 0 else {
throw _NSErrorWithErrno(errno, reading: false, path: filename)
}
bytesWritten += written
}
}
private func extraErrorInfo(srcPath: String?, dstPath: String?, userVariant: String?) -> [String : Any] {
var result = [String : Any]()
result["NSSourceFilePathErrorKey"] = srcPath
result["NSDestinationFilePath"] = dstPath
result["NSUserStringVariant"] = userVariant.map(NSArray.init(object:))
return result
}
private func _copyRegularFile(atPath srcPath: String, toPath dstPath: String, variant: String = "Copy") throws {
let srcRep = fileSystemRepresentation(withPath: srcPath)
let dstRep = fileSystemRepresentation(withPath: dstPath)
defer {
srcRep.deallocate()
dstRep.deallocate()
}
var fileInfo = stat()
guard stat(srcRep, &fileInfo) >= 0 else {
throw _NSErrorWithErrno(errno, reading: true, path: srcPath,
extraUserInfo: extraErrorInfo(srcPath: srcPath, dstPath: dstPath, userVariant: variant))
}
let srcfd = open(srcRep, O_RDONLY)
guard srcfd >= 0 else {
throw _NSErrorWithErrno(errno, reading: true, path: srcPath,
extraUserInfo: extraErrorInfo(srcPath: srcPath, dstPath: dstPath, userVariant: variant))
}
defer { close(srcfd) }
let dstfd = open(dstRep, O_WRONLY | O_CREAT | O_TRUNC, 0o666)
guard dstfd >= 0 else {
throw _NSErrorWithErrno(errno, reading: false, path: dstPath,
extraUserInfo: extraErrorInfo(srcPath: srcPath, dstPath: dstPath, userVariant: variant))
}
defer { close(dstfd) }
if fileInfo.st_size == 0 {
// no copying required
return
}
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: Int(fileInfo.st_blksize))
defer { buffer.deallocate() }
// Casted to Int64 because fileInfo.st_size is 64 bits long even on 32 bit platforms
var bytesRemaining = Int64(fileInfo.st_size)
while bytesRemaining > 0 {
let bytesToRead = min(bytesRemaining, Int64(fileInfo.st_blksize))
let bytesRead = try _readFrom(fd: srcfd, toBuffer: buffer, length: Int(bytesToRead), filename: srcPath)
if bytesRead == 0 {
// Early EOF
return
}
try _writeTo(fd: dstfd, fromBuffer: buffer, length: bytesRead, filename: dstPath)
bytesRemaining -= Int64(bytesRead)
}
}
private func _copySymlink(atPath srcPath: String, toPath dstPath: String, variant: String = "Copy") throws {
let bufSize = Int(PATH_MAX) + 1
var buf = [Int8](repeating: 0, count: bufSize)
try _fileSystemRepresentation(withPath: srcPath) { srcFsRep in
let len = readlink(srcFsRep, &buf, bufSize)
if len < 0 {
throw _NSErrorWithErrno(errno, reading: true, path: srcPath,
extraUserInfo: extraErrorInfo(srcPath: srcPath, dstPath: dstPath, userVariant: variant))
}
try _fileSystemRepresentation(withPath: dstPath) { dstFsRep in
if symlink(buf, dstFsRep) == -1 {
throw _NSErrorWithErrno(errno, reading: false, path: dstPath,
extraUserInfo: extraErrorInfo(srcPath: srcPath, dstPath: dstPath, userVariant: variant))
}
}
}
}
private func _copyOrLinkDirectoryHelper(atPath srcPath: String, toPath dstPath: String, variant: String = "Copy", _ body: (String, String, FileAttributeType) throws -> ()) throws {
guard let stat = try? _lstatFile(atPath: srcPath) else {
return
}
let fileType = FileAttributeType(statMode: stat.st_mode)
if fileType == .typeDirectory {
try createDirectory(atPath: dstPath, withIntermediateDirectories: false, attributes: nil)
guard let enumerator = enumerator(atPath: srcPath) else {
throw _NSErrorWithErrno(ENOENT, reading: true, path: srcPath)
}
while let item = enumerator.nextObject() as? String {
let src = srcPath + "/" + item
let dst = dstPath + "/" + item
if let stat = try? _lstatFile(atPath: src) {
let fileType = FileAttributeType(statMode: stat.st_mode)
if fileType == .typeDirectory {
try createDirectory(atPath: dst, withIntermediateDirectories: false, attributes: nil)
} else {
try body(src, dst, fileType)
}
}
}
} else {
try body(srcPath, dstPath, fileType)
}
}
private func shouldProceedAfterError(_ error: Error, copyingItemAtPath path: String, toPath: String, isURL: Bool) -> Bool {
guard let delegate = self.delegate else { return false }
if isURL {
return delegate.fileManager(self, shouldProceedAfterError: error, copyingItemAt: URL(fileURLWithPath: path), to: URL(fileURLWithPath: toPath))
} else {
return delegate.fileManager(self, shouldProceedAfterError: error, copyingItemAtPath: path, toPath: toPath)
}
}
private func shouldCopyItemAtPath(_ path: String, toPath: String, isURL: Bool) -> Bool {
guard let delegate = self.delegate else { return true }
if isURL {
return delegate.fileManager(self, shouldCopyItemAt: URL(fileURLWithPath: path), to: URL(fileURLWithPath: toPath))
} else {
return delegate.fileManager(self, shouldCopyItemAtPath: path, toPath: toPath)
}
}
fileprivate func _copyItem(atPath srcPath: String, toPath dstPath: String, isURL: Bool) throws {
try _copyOrLinkDirectoryHelper(atPath: srcPath, toPath: dstPath) { (srcPath, dstPath, fileType) in
guard shouldCopyItemAtPath(srcPath, toPath: dstPath, isURL: isURL) else {
return
}
do {
switch fileType {
case .typeRegular:
try _copyRegularFile(atPath: srcPath, toPath: dstPath)
case .typeSymbolicLink:
try _copySymlink(atPath: srcPath, toPath: dstPath)
default:
break
}
} catch {
if !shouldProceedAfterError(error, copyingItemAtPath: srcPath, toPath: dstPath, isURL: isURL) {
throw error
}
}
}
}
private func shouldProceedAfterError(_ error: Error, movingItemAtPath path: String, toPath: String, isURL: Bool) -> Bool {
guard let delegate = self.delegate else { return false }
if isURL {
return delegate.fileManager(self, shouldProceedAfterError: error, movingItemAt: URL(fileURLWithPath: path), to: URL(fileURLWithPath: toPath))
} else {
return delegate.fileManager(self, shouldProceedAfterError: error, movingItemAtPath: path, toPath: toPath)
}
}
private func shouldMoveItemAtPath(_ path: String, toPath: String, isURL: Bool) -> Bool {
guard let delegate = self.delegate else { return true }
if isURL {
return delegate.fileManager(self, shouldMoveItemAt: URL(fileURLWithPath: path), to: URL(fileURLWithPath: toPath))
} else {
return delegate.fileManager(self, shouldMoveItemAtPath: path, toPath: toPath)
}
}
private func _moveItem(atPath srcPath: String, toPath dstPath: String, isURL: Bool) throws {
guard shouldMoveItemAtPath(srcPath, toPath: dstPath, isURL: isURL) else {
return
}
guard !self.fileExists(atPath: dstPath) else {
throw NSError(domain: NSCocoaErrorDomain, code: CocoaError.fileWriteFileExists.rawValue, userInfo: [NSFilePathErrorKey : NSString(dstPath)])
}
try _fileSystemRepresentation(withPath: srcPath, andPath: dstPath, {
if rename($0, $1) != 0 {
if errno == EXDEV {
try _copyOrLinkDirectoryHelper(atPath: srcPath, toPath: dstPath, variant: "Move") { (srcPath, dstPath, fileType) in
do {
switch fileType {
case .typeRegular:
try _copyRegularFile(atPath: srcPath, toPath: dstPath, variant: "Move")
case .typeSymbolicLink:
try _copySymlink(atPath: srcPath, toPath: dstPath, variant: "Move")
default:
break
}
} catch {
if !shouldProceedAfterError(error, movingItemAtPath: srcPath, toPath: dstPath, isURL: isURL) {