System.GIO.File.File

Details

File is a high level abstraction for manipulating files on a virtual file system. Files are lightweight, immutable objects that do no I/O upon creation. It is necessary to understand that File objects do not represent files, merely an identifier for a file. All file content I/O is implemented as streaming operations (see GInputStream and GOutputStream).

To construct a File, you can use: fileFromPath if you have a URI. fileNewForCommandlineArg from a utf8 string gotten from fileGetParseName.

One way to think of a File is as an abstraction of a pathname. For normal files the system pathname is what is stored internally, but as Files are extensible it could also be something else that corresponds to a pathname in a userspace implementation of a filesystem.

Files make up hierarchies of directories and files that correspond to the files on a filesystem. You can move through the file system with File using fileGetParent to get an identifier for the parent directory, fileGetChild to get a child within a directory, fileResolveRelativePath to resolve a relative path between two Files. There can be multiple hierarchies, so you may not end up at the same root if you repeatedly call fileGetParent on two different files.

All Files have a basename (get with fileGetBasename. These names are byte strings that are used to identify the file on the filesystem (relative to its parent directory) and there is no guarantees that they have any particular charset encoding or even make any sense at all. If you want to use filenames in a user interface you should use the display name that you can get by requesting the FileAttributeStandardDisplayName attribute with fileQueryInfo. This is guaranteed to be in utf8 and can be used in a user interface. But always store the real basename or the File to use to actually access the file, because there is no way to go from a display name to the actual name.

Using File as an identifier has the same weaknesses as using a path in that there may be multiple aliases for the same file. For instance, hard or soft links may cause two different Files to refer to the same file. Other possible causes for aliases are: case insensitive filesystems, short and long names on Fat/NTFS, or bind mounts in Linux. If you want to check if two Files point to the same file you can query for the FileAttributeIdFile attribute. Note that File does some trivial canonicalization of pathnames passed in, so that trivial differences in the path string used at creation (duplicated slashes, slash at end of path, . or .. path segments, etc) does not create different Files.

Many File operations have both synchronous and asynchronous versions to suit your application. Asynchronous versions of synchronous functions simply have _async() appended to their function names. The asynchronous I/O functions call a AsyncReadyCallback which is then used to finalize the operation, producing a AsyncResult which is then passed to the function's matching _finish() operation.

Some File operations do not have synchronous analogs, as they may take a very long time to finish, and blocking may leave an application unusable. Notable cases include: fileMountMountable to mount a mountable file. fileUnmountMountableWithOperation to unmount a mountable file. fileEjectMountableWithOperation to eject a mountable file.

One notable feature of Files are entity tags, or etags for short. Entity tags are somewhat like a more abstract version of the traditional mtime, and can be used to quickly determine if the file has been modified from the version on the file system. See the HTTP 1.1 specification for HTTP Etag headers, which are a very similar concept.

Types.

newtype File

Constructors

File (ForeignPtr File)

Instances

Eq File

GObjectClass File

FileClass File

class GObjectClass o => FileClass o

Instances

FileClass File

type FileProgressCallback = Offset -> Offset -> IO ()

type FileReadMoreCallback = ByteString -> IO Bool

type Offset = CLLong

data FileInputStream

Instances

Eq FileInputStream

Ord FileInputStream

GObjectClass FileInputStream

FileInputStreamClass FileInputStream

InputStreamClass FileInputStream

class InputStreamClass o => FileInputStreamClass o

Instances

FileInputStreamClass FileInputStream

data FileOutputStream

Instances

Eq FileOutputStream

Ord FileOutputStream

GObjectClass FileOutputStream

FileOutputStreamClass FileOutputStream

OutputStreamClass FileOutputStream

class OutputStreamClass o => FileOutputStreamClass o

Instances

FileOutputStreamClass FileOutputStream

data InputStream

Instances

Eq InputStream

Ord InputStream

GObjectClass InputStream

InputStreamClass InputStream

class GObjectClass o => InputStreamClass o

Instances

InputStreamClass FileInputStream

InputStreamClass DataInputStream

InputStreamClass BufferedInputStream

InputStreamClass FilterInputStream

InputStreamClass MemoryInputStream

InputStreamClass InputStream

data OutputStream

Instances

Eq OutputStream

Ord OutputStream

GObjectClass OutputStream

OutputStreamClass OutputStream

class GObjectClass o => OutputStreamClass o

Instances

OutputStreamClass MemoryOutputStream

OutputStreamClass FileOutputStream

OutputStreamClass BufferedOutputStream

OutputStreamClass DataOutputStream

OutputStreamClass FilterOutputStream

OutputStreamClass OutputStream

data BufferedInputStream

Instances

Eq BufferedInputStream

Ord BufferedInputStream

GObjectClass BufferedInputStream

BufferedInputStreamClass BufferedInputStream

FilterInputStreamClass BufferedInputStream

InputStreamClass BufferedInputStream

class FilterInputStreamClass o => BufferedInputStreamClass o

Instances

BufferedInputStreamClass DataInputStream

BufferedInputStreamClass BufferedInputStream

data BufferedOutputStream

Instances

Eq BufferedOutputStream

Ord BufferedOutputStream

GObjectClass BufferedOutputStream

BufferedOutputStreamClass BufferedOutputStream

FilterOutputStreamClass BufferedOutputStream

OutputStreamClass BufferedOutputStream

class FilterOutputStreamClass o => BufferedOutputStreamClass o

Instances

BufferedOutputStreamClass BufferedOutputStream

data MemoryInputStream

Instances

Eq MemoryInputStream

Ord MemoryInputStream

GObjectClass MemoryInputStream

MemoryInputStreamClass MemoryInputStream

InputStreamClass MemoryInputStream

class InputStreamClass o => MemoryInputStreamClass o

Instances

MemoryInputStreamClass MemoryInputStream

data MemoryOutputStream

Instances

Eq MemoryOutputStream

Ord MemoryOutputStream

GObjectClass MemoryOutputStream

MemoryOutputStreamClass MemoryOutputStream

OutputStreamClass MemoryOutputStream

class OutputStreamClass o => MemoryOutputStreamClass o

Instances

MemoryOutputStreamClass MemoryOutputStream

data FilterInputStream

Instances

Eq FilterInputStream

Ord FilterInputStream

GObjectClass FilterInputStream

FilterInputStreamClass FilterInputStream

InputStreamClass FilterInputStream

class InputStreamClass o => FilterInputStreamClass o

Instances

FilterInputStreamClass DataInputStream

FilterInputStreamClass BufferedInputStream

FilterInputStreamClass FilterInputStream

data FilterOutputStream

Instances

Eq FilterOutputStream

Ord FilterOutputStream

GObjectClass FilterOutputStream

FilterOutputStreamClass FilterOutputStream

OutputStreamClass FilterOutputStream

class OutputStreamClass o => FilterOutputStreamClass o

Instances

FilterOutputStreamClass BufferedOutputStream

FilterOutputStreamClass DataOutputStream

FilterOutputStreamClass FilterOutputStream

data DataInputStream

Instances

Eq DataInputStream

Ord DataInputStream

GObjectClass DataInputStream

DataInputStreamClass DataInputStream

BufferedInputStreamClass DataInputStream

FilterInputStreamClass DataInputStream

InputStreamClass DataInputStream

class BufferedInputStreamClass o => DataInputStreamClass o

Instances

DataInputStreamClass DataInputStream

data DataOutputStream

Instances

Eq DataOutputStream

Ord DataOutputStream

GObjectClass DataOutputStream

DataOutputStreamClass DataOutputStream

FilterOutputStreamClass DataOutputStream

OutputStreamClass DataOutputStream

class FilterOutputStreamClass o => DataOutputStreamClass o

Instances

DataOutputStreamClass DataOutputStream

Enums

data FileType

Indicates the file's on-disk type.

Constructors

FileTypeUnknown

FileTypeRegular

FileTypeDirectory

FileTypeSymbolicLink

FileTypeSpecial

FileTypeShortcut

FileTypeMountable

Instances

Bounded FileType

Enum FileType

Eq FileType

Ord FileType

Show FileType

Typeable FileType

data FileCopyFlags

Flags used when copying or moving files.

Constructors

FileCopyNone

FileCopyOverwrite

FileCopyBackup

FileCopyNofollowSymlinks

FileCopyAllMetadata

FileCopyNoFallbackForMove

FileCopyTargetDefaultPerms

Instances

Bounded FileCopyFlags

Enum FileCopyFlags

Eq FileCopyFlags

Ord FileCopyFlags

Show FileCopyFlags

Typeable FileCopyFlags

Flags FileCopyFlags

data FileQueryInfoFlags

Flags used when querying a FileInfo.

Constructors

FileQueryInfoNone

FileQueryInfoNofollowSymlinks

Instances

Bounded FileQueryInfoFlags

Enum FileQueryInfoFlags

Flags used when an operation may create a file.

Eq FileQueryInfoFlags

Ord FileQueryInfoFlags

Show FileQueryInfoFlags

Typeable FileQueryInfoFlags

Flags FileQueryInfoFlags

data FileCreateFlags

Constructors

FileCreateNone

FileCreatePrivate

FileCreateReplaceDestination

Instances

Bounded FileCreateFlags

Enum FileCreateFlags

Eq FileCreateFlags

Ord FileCreateFlags

Show FileCreateFlags

Typeable FileCreateFlags

Flags FileCreateFlags

data FileMonitorFlags

Flags used to set what a FileMonitor will watch for.

Constructors

FileMonitorNone

FileMonitorWatchMounts

FileMonitorSendMoved

Instances

Bounded FileMonitorFlags

Enum FileMonitorFlags

Indicates a hint from the file system whether files should be previewed in a file manager. Returned as the value of the key FileAttributeFilesystemUsePreview.

Eq FileMonitorFlags

Ord FileMonitorFlags

Show FileMonitorFlags

Typeable FileMonitorFlags

Flags FileMonitorFlags

data MountMountFlags

Flags used when mounting a mount.

Constructors

MountMountNone

Instances

Bounded MountMountFlags

Enum MountMountFlags

Eq MountMountFlags

Ord MountMountFlags

Show MountMountFlags

Typeable MountMountFlags

Flags MountMountFlags

data MountUnmountFlags

Flags used when an unmounting a mount.

Constructors

MountUnmountNone

MountUnmountForce

Instances

Bounded MountUnmountFlags

Enum MountUnmountFlags

Eq MountUnmountFlags

Ord MountUnmountFlags

Show MountUnmountFlags

Typeable MountUnmountFlags

Flags MountUnmountFlags

Methods

fileFromPath :: ByteString -> File

Constructs a File for a given path. This operation never fails, but the returned object might not support any I/O operation if path is malformed.

fileFromURI :: String -> File

Constructs a File for a given URI. This operation never fails, but the returned object might not support any I/O operation if uri is malformed or if the uri type is not supported.

fileFromCommandlineArg :: ByteString -> File

Creates a File with the given argument from the command line. The value of arg can be either a URI, an absolute path or a relative path resolved relative to the current working directory. This operation never fails, but the returned object might not support any I/O operation if arg points to a malformed path.

fileFromParseName :: String -> File

Constructs a File with the given name (i.e. something given by fileParseName. This operation never fails, but the returned object might not support any I/O operation if the parseName cannot be parsed.

fileEqual :: (FileClass file1, FileClass file2) => file1 -> file2 -> Bool

Compare two file descriptors for equality. This test is also used to implement the '(==)' function, that is, comparing two descriptions will compare their content, not the pointers to the two structures.

fileBasename :: FileClass file => file -> ByteString

Gets the base name (the last component of the path) for a given File.

If called for the top level of a system (such as the filesystem root or a uri like sftp: will return a single directory separator (and on Windows, possibly a drive letter).

The base name is a byte string (*not* UTF-8). It has no defined encoding or rules other than it may not contain zero bytes. If you want to use filenames in a user interface you should use the display name that you can get by requesting the FileAttributeStandardDisplayName attribute with fileQueryInfo.

This call does no blocking i/o.

filePath :: FileClass file => file -> ByteString

Gets the local pathname for File, if one exists.

This call does no blocking i/o.

fileHasParent :: FileClass file => file -> Maybe File -> Bool

Checks if file has a parent, and optionally, if it is parent.

If parent is Nothing then this function returns True if file has any parent at all. If parent is non-Nothing then True is only returned if file is a child of parent.

fileURI :: FileClass file => file -> String

Gets the URI for the file.

This call does no blocking i/o.

fileParseName :: FileClass file => file -> String

Gets the parse name of the file. A parse name is a UTF-8 string that describes the file such that one can get the File back using fileParseName.

This is generally used to show the File as a nice full-pathname kind of string in a user interface, like in a location entry.

For local files with names that can safely be converted to UTF8 the pathname is used, otherwise the IRI is used (a form of URI that allows UTF8 characters unescaped).

This call does no blocking i/o.

fileGetChild :: FileClass file => file -> ByteString -> File

Gets a child of file with basename equal to name.

Note that the file with that specific name might not exist, but you can still have a File that points to it. You can use this for instance to create that file.

This call does no blocking i/o.

fileGetChildForDisplayName :: FileClass file => file -> String -> File

Gets the child of file for a given 'name (i.e. a UTF8 version of the name)'. If this function fails, it throws a GError. This is very useful when constructing a File for a new file and the user entered the filename in the user interface, for instance when you select a directory and type a filename in the file selector.

This call does no blocking i/o.

fileHasPrefix :: (FileClass file1, FileClass file2) => file1 -> file2 -> Bool

Checks whether file has the prefix specified by prefix. In other word, if the names of inital elements of files pathname match prefix. Only full pathname elements are matched, so a path like foo is not considered a prefix of foobar, only of foobar.

This call does no i/o, as it works purely on names. As such it can sometimes return False even if file is inside a prefix (from a filesystem point of view), because the prefix of file is an alias of prefix.

fileGetRelativePath :: (FileClass file1, FileClass file2) => file1 -> file2 -> Maybe ByteString

Gets the path for descendant relative to parent.

This call does no blocking i/o.

fileResolveRelativePath :: FileClass file => file -> ByteString -> Maybe File

Resolves a relative path for file to an absolute path.

This call does no blocking i/o.

fileIsNative :: FileClass file => file -> Bool

Checks to see if a file is native to the platform.

A native file s one expressed in the platform-native filename format, e.g. "C:Windows" or "usrbin/". This does not mean the file is local, as it might be on a locally mounted remote filesystem.

On some systems non-native files may be available using the native filesystem via a userspace filesystem (FUSE), in these cases this call will return False, but fileGetPath will still return a native path.

This call does no blocking i/o.

fileHasURIScheme :: FileClass file => file -> String -> Bool

Checks to see if a File has a given URI scheme.

This call does no blocking i/o.

fileURIScheme :: FileClass file => file -> String

Gets the URI scheme for a File. RFC 3986 decodes the scheme as:

URI = scheme : hier-part [ ? query ] [ fragment ]

Common schemes include file, http, ftp, etc.

This call does no blocking i/o.

fileRead :: FileClass file => file -> Maybe Cancellable -> IO FileInputStream

Opens a file for reading. The result is a FileInputStream that can be used to read the contents of the file.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

If the file does not exist, the IoErrorNotFound error will be returned. If the file is a directory, the IoErrorIsDirectory error will be returned. Other errors are possible too, and depend on what kind of filesystem the file is on.

fileReadAsync :: FileClass file => file -> Int -> Maybe Cancellable -> AsyncReadyCallback -> IO ()

Asynchronously opens file for reading.

For more details, see fileRead which is the synchronous version of this call.

When the operation is finished, callback will be called. You can then call fileReadFinish to get the result of the operation.

fileReadFinish :: FileClass file => file -> AsyncResult -> IO FileInputStream

Finishes an asynchronous file read operation started with fileReadAsync.

fileAppendTo :: FileClass file => file -> [FileCreateFlags] -> Maybe Cancellable -> IO FileOutputStream

Gets an output stream for appending data to the file. If the file doesn't already exist it is created.

By default files created are generally readable by everyone, but if you pass FileCreatePrivate in flags the file will be made readable only to the current user, to the level that is supported on the target filesystem.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

Some file systems don't allow all file names, and may return an IoErrorInvalidFilename error. If the file is a directory the IoErrorIsDirectory error will be returned. Other errors are possible too, and depend on what kind of filesystem the file is on.

fileCreate :: FileClass file => file -> [FileCreateFlags] -> Maybe Cancellable -> IO FileOutputStream

Creates a new file and returns an output stream for writing to it. The file must not already exist.

By default files created are generally readable by everyone, but if you pass FileCreatePrivate in flags the file will be made readable only to the current user, to the level that is supported on the target filesystem.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

If a file or directory with this name already exists the IoErrorExists error will be returned. Some file systems don't allow all file names, and may return an IoErrorInvalidFilename error, and if the name is to long IoErrorFilenameTooLong will be returned. Other errors are possible too, and depend on what kind of filesystem the file is on.

fileReplace :: FileClass file => file -> Maybe String -> Bool -> [FileCreateFlags] -> Maybe Cancellable -> IO FileOutputStream

Returns an output stream for overwriting the file, possibly creating a backup copy of the file first. If the file doesn't exist, it will be created.

This will try to replace the file in the safest way possible so that any errors during the writing will not affect an already existing copy of the file. For instance, for local files it may write to a temporary file and then atomically rename over the destination when the stream is closed.

By default files created are generally readable by everyone, but if you pass FileCreatePrivate in flags the file will be made readable only to the current user, to the level that is supported on the target filesystem.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

If you pass in a non-Nothing etag value, then this value is compared to the current entity tag of the file, and if they differ an IoErrorWrongEtag error is returned. This generally means that the file has been changed since you last read it. You can get the new etag from fileOutputStreamGetEtag after you've finished writing and closed the FileOutputStream. When you load a new file you can use fileInputStreamQueryInfo to get the etag of the file.

If makeBackup is True, this function will attempt to make a backup of the current file before overwriting it. If this fails a IoErrorCantCreateBackup error will be returned. If you want to replace anyway, try again with makeBackup set to False.

If the file is a directory the IoErrorIsDirectory error will be returned, and if the file is some other form of non-regular file then a IoErrorNotRegularFile error will be returned. Some file systems don't allow all file names, and may return an IoErrorInvalidFilename error, and if the name is to long IoErrorFilenameTooLong will be returned. Other errors are possible too, and depend on what kind of filesystem the file is on.

fileAppendToAsync :: FileClass file => file -> [FileCreateFlags] -> Int -> Maybe Cancellable -> AsyncReadyCallback -> IO ()

Asynchronously opens file for appending.

For more details, see fileAppendTo which is the synchronous version of this call.

When the operation is finished, callback will be called. You can then call fileAppendToFinish to get the result of the operation.

fileAppendToFinish :: FileClass file => file -> AsyncResult -> IO FileOutputStream

Finishes an asynchronous file append operation started with fileAppendToAsync.

fileCreateAsync :: FileClass file => file -> [FileCreateFlags] -> Int -> Maybe Cancellable -> AsyncReadyCallback -> IO ()

Asynchronously creates a new file and returns an output stream for writing to it. The file must not already exist.

For more details, see fileCreate which is the synchronous version of this call.

When the operation is finished, callback will be called. You can then call fileCreateFinish to get the result of the operation.

fileCreateFinish :: FileClass file => file -> AsyncResult -> IO FileOutputStream

Finishes an asynchronous file create operation started with fileCreateAsync.

fileReplaceAsync :: FileClass file => file -> String -> Bool -> [FileCreateFlags] -> Int -> Maybe Cancellable -> AsyncReadyCallback -> IO ()

Asynchronously overwrites the file, replacing the contents, possibly creating a backup copy of the file first.

For more details, see fileReplace which is the synchronous version of this call.

When the operation is finished, callback will be called. You can then call fileReplaceFinish to get the result of the operation.

fileReplaceFinish :: FileClass file => file -> AsyncResult -> IO FileOutputStream

Finishes an asynchronous file replace operation started with fileReplaceAsync.

fileQueryInfo :: FileClass file => file -> String -> [FileQueryInfoFlags] -> Maybe Cancellable -> IO FileInfo

Gets the requested information about specified file. The result is a FileInfo object that contains key-value attributes (such as the type or size of the file).

The attribute value is a string that specifies the file attributes that should be gathered. It is not an error if it's not possible to read a particular requested attribute from a file - it just won't be set. attribute should be a comma-separated list of attribute or attribute wildcards. The wildcard "*" means all attributes, and a wildcard like "standard::*" means all attributes in the standard namespace. An example attribute query be "standard::*,user". The standard attributes are available as defines, like FileAttributeStandardName.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

For symlinks, normally the information about the target of the symlink is returned, rather than information about the symlink itself. However if you pass FileQueryInfoNofollowSymlinks in flags the information about the symlink itself will be returned. Also, for symlinks that point to non-existing files the information about the symlink itself will be returned.

If the file does not exist, the IoErrorNotFound error will be returned. Other errors are possible too, and depend on what kind of filesystem the file is on.

fileQueryInfoAsync :: FileClass file => file -> String -> [FileQueryInfoFlags] -> Int -> Maybe Cancellable -> AsyncReadyCallback -> IO ()

Asynchronously gets the requested information about specified file. The result is a FileInfo object that contains key-value attributes (such as type or size for the file).

For more details, see fileQueryInfo which is the synchronous version of this call.

When the operation is finished, callback will be called. You can then call fileQueryInfoFinish to get the result of the operation.

fileQueryInfoFinish :: FileClass file => file -> AsyncResult -> IO FileInfo

Finishes an asynchronous file info query. See fileQueryInfoAsync.

fileQueryExists :: FileClass file => file -> Maybe Cancellable -> Bool

Utility function to check if a particular file exists. This is implemented using fileQueryInfo and as such does blocking I/O.

Note that in many cases it is racy to first check for file existence and then execute something based on the outcome of that, because the file might have been created or removed in between the operations. The general approach to handling that is to not check, but just do the operation and handle the errors as they come.

As an example of race-free checking, take the case of reading a file, and if it doesn't exist, creating it. There are two racy versions: read it, and on error create it; and: check if it exists, if not create it. These can both result in two processes creating the file (with perhaps a partially written file as the result). The correct approach is to always try to create the file with fileCreate which will either atomically create the file or fail with a IoErrorExists error.

However, in many cases an existence check is useful in a user interface, for instance to make a menu item sensitive/ insensitive, so that you don't have to fool users that something is possible and then just show and error dialog. If you do this, you should make sure to also handle the errors that can happen due to races when you execute the operation.

fileQueryFileType :: FileClass file => file -> [FileQueryInfoFlags] -> Maybe Cancellable -> FileType

Utility function to inspect the FileType of a file. This is implemented using fileQueryInfo and as such does blocking I/O.

The primary use case of this method is to check if a file is a regular file, directory, or symlink.

fileQueryFilesystemInfo :: FileClass file => file -> String -> Maybe Cancellable -> IO FileInfo

Similar to fileQueryInfo, but obtains information about the filesystem the file is on, rather than the file itself. For instance the amount of space available and the type of the filesystem.

The attribute value is a string that specifies the file attributes that should be gathered. It is not an error if it's not possible to read a particular requested attribute from a file - it just won't be set. attribute should be a comma-separated list of attribute or attribute wildcards. The wildcard "*" means all attributes, and a wildcard like fs:* means all attributes in the fs namespace. The standard namespace for filesystem attributes is fs. Common attributes of interest are 'FILEAttributeFilesystemSize (The Total Size Of The Filesystem In Bytes)', 'FILEAttributeFilesystemFree (Number Of Bytes Available)', and FileAttributeFilesystemType (type of the filesystem).

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

If the file does not exist, the IoErrorNotFound error will be returned. Other errors are possible too, and depend on what kind of filesystem the file is on.

fileQueryFilesystemInfoAsync :: FileClass file => file -> String -> Int -> Maybe Cancellable -> AsyncReadyCallback -> IO ()

Asynchronously gets the requested information about the filesystem that the specified file is on. The result is a FileInfo object that contains key-value attributes (such as type or size for the file).

For more details, see fileQueryFilesystemInfo which is the synchronous version of this call.

When the operation is finished, callback will be called. You can then call fileQueryInfoFinish to get the result of the operation.

fileQueryFilesystemInfoFinish :: FileClass file => file -> AsyncResult -> IO FileInfo

Finishes an asynchronous filesystem info query. See fileQueryFilesystemInfoAsync.

fileQueryDefaultHandler :: FileClass file => file -> Maybe Cancellable -> IO AppInfo

Returns the AppInfo that is registered as the default application to handle the file specified by file.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileFindEnclosingMount :: FileClass file => file -> Maybe Cancellable -> IO Mount

Gets a Mount for the File.

If the FileIface for file does not have a mount (e.g. possibly a remote share), error will be set to IoErrorNotFound and Nothing will be returned.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileFindEnclosingMountAsync :: FileClass file => file -> Int -> Maybe Cancellable -> AsyncReadyCallback -> IO ()

Asynchronously gets the mount for the file.

For more details, see fileFindEnclosingMount which is the synchronous version of this call.

When the operation is finished, callback will be called. You can then call fileFindEnclosingMountFinish to get the result of the operation.

fileFindEnclosingMountFinish :: FileClass file => file -> AsyncResult -> IO Mount

Finishes an asynchronous find mount request. See fileFindEnclosingMountAsync.

fileEnumerateChildren :: FileClass file => file -> String -> [FileQueryInfoFlags] -> Maybe Cancellable -> IO FileEnumerator

Gets the requested information about the files in a directory. The result is a FileEnumerator object that will give out FileInfo objects for all the files in the directory.

The attribute value is a string that specifies the file attributes that should be gathered. It is not an error if it's not possible to read a particular requested attribute from a file - it just won't be set. attribute should be a comma-separated list of attribute or attribute wildcards. The wildcard "*" means all attributes, and a wildcard like "standard::*" means all attributes in the standard namespace. An example attribute query be "standard::*,user". The standard attributes are available as defines, like FileAttributeStandardName.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

If the file does not exist, the IoErrorNotFound error will be returned. If the file is not a directory, the FileErrorNotdir error will be returned. Other errors are possible too.

fileEnumerateChildrenAsync :: FileClass file => file -> String -> [FileQueryInfoFlags] -> Int -> Maybe Cancellable -> AsyncReadyCallback -> IO ()

Asynchronously gets the requested information about the files in a directory. The result is a FileEnumerator object that will give out FileInfo objects for all the files in the directory.

For more details, see fileEnumerateChildren which is the synchronous version of this call.

When the operation is finished, callback will be called. You can then call fileEnumerateChildrenFinish to get the result of the operation.

fileEnumerateChildrenFinish :: FileClass file => file -> AsyncResult -> IO FileEnumerator

Finishes an async enumerate children operation. See fileEnumerateChildrenAsync.

fileSetDisplayName :: FileClass file => file -> String -> Maybe Cancellable -> IO File

Renames file to the specified display name.

The display name is converted from UTF8 to the correct encoding for the target filesystem if possible and the file is renamed to this.

If you want to implement a rename operation in the user interface the edit name (FileAttributeStandardEditName) should be used as the initial value in the rename widget, and then the result after editing should be passed to fileSetDisplayName.

On success the resulting converted filename is returned.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileSetDisplayNameAsync :: FileClass file => file -> String -> Int -> Maybe Cancellable -> AsyncReadyCallback -> IO ()

Asynchronously sets the display name for a given File.

For more details, see fileSetDisplayName which is the synchronous version of this call.

When the operation is finished, callback will be called. You can then call fileSetDisplayNameFinish to get the result of the operation.

fileSetDisplayNameFinish :: FileClass file => file -> AsyncResult -> IO File

Finishes setting a display name started with fileSetDisplayNameAsync.

fileDelete :: FileClass file => file -> Maybe Cancellable -> IO ()

Deletes a file. If the file is a directory, it will only be deleted if it is empty.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileTrash :: FileClass file => file -> Maybe Cancellable -> IO ()

Sends file to the Trashcan, if possible. This is similar to deleting it, but the user can recover it before emptying the trashcan. Not all file systems support trashing, so this call can return the IoErrorNotSupported error.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileCopy :: (FileClass source, FileClass destination) => source -> destination -> [FileCopyFlags] -> Maybe Cancellable -> Maybe FileProgressCallback -> IO ()

Copies the file source to the location specified by destination. Can not handle recursive copies of directories.

If the flag FileCopyOverwrite is specified an already existing destination file is overwritten.

If the flag FileCopyNofollowSymlinks is specified then symlinks will be copied as symlinks, otherwise the target of the source symlink will be copied.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

If progressCallback is not Nothing, then the operation can be monitored by setting this to a FileProgressCallback function. progressCallbackData will be passed to this function. It is guaranteed that this callback will be called after all data has been transferred with the total number of bytes copied during the operation.

If the source file does not exist then the IoErrorNotFound error is returned, independent on the status of the destination.

If FileCopyOverwrite is not specified and the target exists, then the error IoErrorExists is returned.

If trying to overwrite a file over a directory the IoErrorIsDirectory error is returned. If trying to overwrite a directory with a directory the IoErrorWouldMerge error is returned.

If the source is a directory and the target does not exist, or FileCopyOverwrite is specified and the target is a file, then the IoErrorWouldRecurse error is returned.

If you are interested in copying the File object itself (not the on-disk file), see fileDup.

fileCopyAsync :: (FileClass source, FileClass destination) => source -> destination -> [FileCopyFlags] -> Int -> Maybe Cancellable -> Maybe FileProgressCallback -> AsyncReadyCallback -> IO ()

Copies the file source to the location specified by destination asynchronously. For details of the behaviour, see fileCopy.

If progressCallback is not Nothing, then that function that will be called just like in fileCopy, however the callback will run in the main loop, not in the thread that is doing the I/O operation.

When the operation is finished, callback will be called. You can then call fileCopyFinish to get the result of the operation.

fileCopyFinish :: FileClass file => file -> AsyncResult -> IO ()

Finishes copying the file started with fileCopyAsync.

Throws a GError if an error occurs.

fileMove :: (FileClass source, FileClass destination) => source -> destination -> [FileCopyFlags] -> Maybe Cancellable -> Maybe FileProgressCallback -> IO ()

Tries to move the file or directory source to the location specified by destination. If native move operations are supported then this is used, otherwise a copy + delete fallback is used. The native implementation may support moving directories (for instance on moves inside the same filesystem), but the fallback code does not.

If the flag FileCopyOverwrite is specified an already existing destination file is overwritten.

If the flag FileCopyNofollowSymlinks is specified then symlinks will be copied as symlinks, otherwise the target of the source symlink will be copied.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

If progressCallback is not Nothing, then the operation can be monitored by setting this to a FileProgressCallback function. progressCallbackData will be passed to this function. It is guaranteed that this callback will be called after all data has been transferred with the total number of bytes copied during the operation.

If the source file does not exist then the IoErrorNotFound error is returned, independent on the status of the destination.

If FileCopyOverwrite is not specified and the target exists, then the error IoErrorExists is returned.

If trying to overwrite a file over a directory the IoErrorIsDirectory error is returned. If trying to overwrite a directory with a directory the IoErrorWouldMerge error is returned.

If the source is a directory and the target does not exist, or FileCopyOverwrite is specified and the target is a file, then the IoErrorWouldRecurse error may be returned (if the native move operation isn't available).

fileMakeDirectory :: FileClass file => file -> Maybe Cancellable -> IO ()

Creates a directory. Note that this will only create a child directory of the immediate parent directory of the path or URI given by the File. To recursively create directories, see fileMakeDirectoryWithParents. This function will fail if the parent directory does not exist, setting error to IoErrorNotFound. If the file system doesn't support creating directories, this function will fail, setting error to IoErrorNotSupported.

For a local File the newly created directory will have the default (current) ownership and permissions of the current process.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileMakeDirectoryWithParents :: FileClass file => file -> Maybe Cancellable -> IO ()

Creates a directory and any parent directories that may not exist similar to 'mkdir -p'. If the file system does not support creating directories, this function will fail, setting error to IoErrorNotSupported.

For a local File the newly created directories will have the default (current) ownership and permissions of the current process.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileMakeSymbolicLink :: FileClass file => file -> ByteString -> Maybe Cancellable -> IO ()

Creates a symbolic link.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileQuerySettableAttributes :: FileClass file => file -> Maybe Cancellable -> IO [FileAttributeInfo]

Obtain the list of settable attributes for the file.

Returns the type and full attribute name of all the attributes that can be set on this file. This doesn't mean setting it will always succeed though, you might get an access failure, or some specific file may not support a specific attribute.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileQueryWritableNamespaces :: FileClass file => file -> Maybe Cancellable -> IO [FileAttributeInfo]

Obtain the list of attribute namespaces where new attributes can be created by a user. An example of this is extended attributes (in the xattr namespace).

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileSetAttributesFromInfo

Arguments

:: FileClass file

=> file

-> FileInfo

-> [FileQueryInfoFlags]

-> Maybe Cancellable

cancellable optional Cancellable object, Nothing to ignore.

-> IO ()

Tries to set all attributes in the FileInfo on the target values, not stopping on the first error.

If there is any error during this operation then error will be set to the first error. Error on particular fields are flagged by setting the status field in the attribute value to FileAttributeStatusErrorSetting, which means you can also detect further errors.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileSetAttributesFromInfoAsync

Arguments

:: FileClass file

=> file

-> FileInfo

-> [FileQueryInfoFlags]

-> Int

ioPriority the I/O priority of the request.

-> Maybe Cancellable

cancellable optional Cancellable object, Nothing to ignore.

-> AsyncReadyCallback

-> IO ()

returns True if there was any error, False otherwise.

Asynchronously sets the attributes of file with info.

For more details, see fileSetAttributesFromInfo which is the synchronous version of this call.

When the operation is finished, callback will be called. You can then call fileSetAttributesFinish to get the result of the operation.

fileSetAttributesFinish :: FileClass file => file -> AsyncResult -> FileInfo -> IO ()

Finishes setting an attribute started in fileSetAttributesAsync.

Throws a GError if an error occurs.

fileSetAttributeString

Arguments

:: FileClass file

=> file

-> String

attribute a string containing the attribute's name.

-> String

value a string containing the attribute's value.

-> [FileQueryInfoFlags]

flags FileQueryInfoFlags.

-> Maybe Cancellable

cancellable optional Cancellable object, Nothing to ignore.

-> IO ()

Sets attribute of type FileAttributeTypeString to value. If attribute is of a different type, this operation will fail.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileSetAttributeByteString

Arguments

:: FileClass file

=> file

-> String

attribute a string containing the attribute's name.

-> String

value a string containing the attribute's value.

-> [FileQueryInfoFlags]

flags FileQueryInfoFlags.

-> Maybe Cancellable

cancellable optional Cancellable object, Nothing to ignore.

-> IO ()

Sets attribute of type FileAttributeTypeByteString to value. If attribute is of a different type, this operation will fail, returning False.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileSetAttributeWord32

Arguments

:: FileClass file

=> file

-> String

attribute a string containing the attribute's name.

-> Word32

value a Word32 containing the attribute's new value.

-> [FileQueryInfoFlags]

flags FileQueryInfoFlags.

-> Maybe Cancellable

cancellable optional Cancellable object, Nothing to ignore.

-> IO ()

Sets attribute of type FileAttributeTypeUint32 to value. If attribute is of a different type, this operation will fail.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileSetAttributeInt32

Arguments

:: FileClass file

=> file

-> String

attribute a string containing the attribute's name.

-> Int32

value a Int32 containing the attribute's new value.

-> [FileQueryInfoFlags]

flags FileQueryInfoFlags.

-> Maybe Cancellable

cancellable optional Cancellable object, Nothing to ignore.

-> IO ()

Sets attribute of type FileAttributeTypeInt32 to value. If attribute is of a different type, this operation will fail.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileSetAttributeWord64

Arguments

:: FileClass file

=> file

-> String

attribute a string containing the attribute's name.

-> Word64

value a Word64 containing the attribute's new value.

-> [FileQueryInfoFlags]

flags FileQueryInfoFlags.

-> Maybe Cancellable

cancellable optional Cancellable object, Nothing to ignore.

-> IO ()

Sets attribute of type FileAttributeTypeUint64 to value. If attribute is of a different type, this operation will fail.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileSetAttributeInt64

Arguments

:: FileClass file

=> file

-> String

attribute a string containing the attribute's name.

-> Int64

value a Int64 containing the attribute's new value.

-> [FileQueryInfoFlags]

flags FileQueryInfoFlags.

-> Maybe Cancellable

cancellable optional Cancellable object, Nothing to ignore.

-> IO ()

Sets attribute of type FileAttributeTypeInt64 to value. If attribute is of a different type, this operation will fail.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileCopyAttributes

Arguments

:: (FileClass source, FileClass destination)

=> source

source a File with attributes.

-> destination

destination a File to copy attributes to.

-> [FileCopyFlags]

flags a set of FileCopyFlags.

-> Maybe Cancellable

cancellable optional Cancellable object, Nothing to ignore.

-> IO ()

Copies the file attributes from source to destination.

Normally only a subset of the file attributes are copied, those that are copies in a normal file copy operation (which for instance does not include e.g. owner). However if FileCopyAllMetadata is specified in flags, then all the metadata that is possible to copy is copied. This is useful when implementing move by copy + delete source.

fileMonitorDirectory :: FileClass file => file -> [FileMonitorFlags] -> Maybe Cancellable -> IO FileMonitor

Obtains a directory monitor for the given file. This may fail if directory monitoring is not supported.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileMonitorFile :: FileClass file => file -> [FileMonitorFlags] -> Maybe Cancellable -> IO FileMonitor

Obtains a file monitor for the given file. If no file notification mechanism exists, then regular polling of the file is used.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileMonitor :: FileClass file => file -> [FileMonitorFlags] -> Maybe Cancellable -> IO FileMonitor

Obtains a file or directory monitor for the given file, depending on the type of the file.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileMountMountable

Arguments

:: FileClass file

=> file

-> [MountMountFlags]

flags flags affecting the operation

-> Maybe MountOperation

mountOperation a MountOperation or Nothing to avoid user interaction.

-> Maybe Cancellable

cancellable optional Cancellable object, Nothing to ignore.

-> AsyncReadyCallback

callback a AsyncReadyCallback

-> IO ()

Mounts a file of type FileTypeMountable. Using mountOperation, you can request callbacks when, for instance, passwords are needed during authentication.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

When the operation is finished, callback will be called. You can then call fileMountMountableFinish to get the result of the operation.

fileMountMountableFinish

Arguments

:: FileClass file

=> file

-> AsyncResult

result a AsyncResult

-> IO File

Finishes a mount operation. See fileMountMountable for details.

Finish an asynchronous mount operation that was started with fileMountMountable.

fileUnmountMountableWithOperation

Arguments

:: FileClass file

=> file

-> [MountUnmountFlags]

flags flags affecting the operation

-> Maybe MountOperation

mountOperation a MountOperation or Nothing to avoid user interaction.

-> Maybe Cancellable

cancellable optional Cancellable object, Nothing to ignore.

-> AsyncReadyCallback

callback a AsyncReadyCallback

-> IO ()

Unmounts a file of type FileTypeMountable.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

When the operation is finished, callback will be called. You can then call fileUnmountMountableFinish to get the result of the operation.

fileUnmountMountableWithOperationFinish

Arguments

:: FileClass file

=> file

-> AsyncResult

result a AsyncResult

-> IO ()

Finishes an unmount operation, see fileUnmountMountableWithOperation for details.

Finish an asynchronous unmount operation that was started with fileUnmountMountableWithOperation.

Throws a GError if an error occurs.

fileEjectMountableWithOperation

Arguments

:: FileClass file

=> file

-> [MountUnmountFlags]

flags flags affecting the operation

-> Maybe MountOperation

mountOperation a MountOperation or Nothing to avoid user interaction.

-> Maybe Cancellable

cancellable optional Cancellable object, Nothing to ignore.

-> AsyncReadyCallback

callback a AsyncReadyCallback

-> IO ()

Starts an asynchronous eject on a mountable. When this operation has completed, callback will be called with userUser data, and the operation can be finalized with fileEjectMountableWithOperationFinish.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileEjectMountableWithOperationFinish

Arguments

:: FileClass file

=> file

-> AsyncResult

result a AsyncResult

-> IO ()

Finishes an asynchronous eject operation started by fileEjectMountableWithOperation.

Throws a GError if an error occurs.

fileStartMountable

Arguments

:: FileClass file

=> file

-> [DriveStartFlags]

flags flags affecting the start operation.

-> Maybe MountOperation

mountOperation a MountOperation or Nothing to avoid user interaction.

-> Maybe Cancellable

cancellable optional Cancellable object, Nothing to ignore.

-> AsyncReadyCallback

callback a AsyncReadyCallback

-> IO ()

Starts a file of type FileTypeMountable. Using startOperation, you can request callbacks when, for instance, passwords are needed during authentication.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

When the operation is finished, callback will be called. You can then call fileMountMountableFinish to get the result of the operation.

fileStartMountableFinish

Arguments

:: FileClass file

=> file

-> AsyncResult

result a AsyncResult.

-> IO ()

Finishes a start operation. See fileStartMountable for details.

Finish an asynchronous start operation that was started with fileStartMountable.

Throws a GError if an error occurs.

fileStopMountable

Arguments

:: FileClass file

=> file

-> [MountUnmountFlags]

flags flags affecting the stop operation.

-> Maybe MountOperation

mountOperation a MountOperation or Nothing to avoid user interaction.

-> Maybe Cancellable

cancellable optional Cancellable object, Nothing to ignore.

-> AsyncReadyCallback

callback a AsyncReadyCallback

-> IO ()

Stops a file of type FileTypeMountable.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

When the operation is finished, callback will be called. You can then call fileStopMountableFinish to get the result of the operation.

fileStopMountableFinish

Arguments

:: FileClass file

=> file

-> AsyncResult

result a AsyncResult.

-> IO ()

Finishes a stop operation. See fileStopMountable for details.

Finish an asynchronous stop operation that was stoped with fileStopMountable.

Throws a GError if an error occurs.

filePollMountable :: FileClass file => file -> Maybe Cancellable -> AsyncReadyCallback -> IO ()

Polls a file of type FileTypeMountable.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

When the operation is finished, callback will be called. You can then call fileMountMountableFinish to get the result of the operation.

filePollMountableFinish

Arguments

:: FileClass file

=> file

-> AsyncResult

result a AsyncResult.

-> IO Bool

returns True if the file was successfully ejected. False otherwise.

Finishes a poll operation. See filePollMountable for details.

Finish an asynchronous poll operation that was polled with filePollMountable.

fileMountEnclosingVolume

Arguments

:: FileClass file

=> file

-> [MountMountFlags]

flags flags affecting the operation

-> Maybe MountOperation

mountOperation a MountOperation or Nothing to avoid user interaction.

-> Maybe Cancellable

cancellable optional Cancellable object, Nothing to ignore.

-> AsyncReadyCallback

callback a AsyncReadyCallback

-> IO ()

Starts a mountOperation, mounting the volume that contains the file location.

When this operation has completed, callback will be called with userUser data, and the operation can be finalized with fileMountEnclosingVolumeFinish.

If cancellable is not Nothing, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error IoErrorCancelled will be returned.

fileMountEnclosingVolumeFinish

Arguments

:: FileClass file

=> file

-> AsyncResult

result a AsyncResult.

-> IO Bool

returns True if the file was successfully ejected. False otherwise.

Finishes a mount operation started by fileMountEnclosingVolume.

fileSupportsThreadContexts

Arguments

:: FileClass file

=> file

-> IO Bool

returns Whether or not file supports thread-default contexts.

Checks if file supports thread-default contexts. If this returns False, you cannot perform asynchronous operations on file in a thread that has a thread-default context.