Library: Foundation
Package: Filesystem
Header: Poco/File.h
Description
The File class provides methods for working with a file.
Inheritance
Direct Base Classes: FileImpl
All Base Classes: FileImpl
Known Derived Classes: TemporaryFile
Member Summary
Member Functions: canExecute, canRead, canWrite, copyDirectory, copyTo, createDirectories, createDirectory, createFile, created, exists, getLastModified, getSize, handleLastError, isDevice, isDirectory, isFile, isHidden, isLink, list, moveTo, operator !=, operator <, operator <=, operator =, operator ==, operator >, operator >=, path, remove, renameTo, setExecutable, setLastModified, setReadOnly, setSize, setWriteable, swap
Types
FileSize
typedef FileSizeImpl FileSize;
Constructors
File
File();
Creates the file.
File
File(
const std::string & path
);
Creates the file.
File
File(
const char * path
);
Creates the file.
File
Creates the file.
File
Copy constructor.
Destructor
~File 
virtual ~File();
Destroys the file.
Member Functions
canExecute
bool canExecute() const;
Returns true if and only if the file is executable.
On Windows and OpenVMS, the file must have the extension ".EXE" to be executable. On Unix platforms, the executable permission bit must be set.
canRead
bool canRead() const;
Returns true if and only if the file is readable.
canWrite
bool canWrite() const;
Returns true if and only if the file is writeable.
copyTo
void copyTo(
const std::string & path
) const;
Copies the file (or directory) to the given path. The target path can be a directory.
A directory is copied recursively.
createDirectories
void createDirectories();
Creates a directory (and all parent directories if necessary).
createDirectory
bool createDirectory();
Creates a directory. Returns true if the directory has been created and false if it already exists. Throws an exception if an error occurs.
createFile
bool createFile();
Creates a new, empty file in an atomic operation. Returns true if the file has been created and false if the file already exists. Throws an exception if an error occurs.
created
Timestamp created() const;
Returns the creation date of the file.
Not all platforms or filesystems (e.g. Linux and most Unix platforms with the exception of FreeBSD and Mac OS X) maintain the creation date of a file. On such platforms, created() returns the time of the last inode modification.
exists
bool exists() const;
Returns true if and only if the file exists.
getLastModified
Timestamp getLastModified() const;
Returns the modification date of the file.
getSize
FileSize getSize() const;
Returns the size of the file in bytes.
handleLastError 
static void handleLastError(
const std::string & path
);
For internal use only. Throws an appropriate exception for the last file-related error.
isDevice
bool isDevice() const;
Returns true if and only if the file is a device.
isDirectory
bool isDirectory() const;
Returns true if and only if the file is a directory.
isFile
bool isFile() const;
Returns true if and only if the file is a regular file.
isHidden
bool isHidden() const;
Returns true if the file is hidden.
On Windows platforms, the file's hidden attribute is set for this to be true.
On Unix platforms, the file name must begin with a period for this to be true.
isLink
bool isLink() const;
Returns true if and only if the file is a symbolic link.
list
void list(
std::vector < std::string > & files
) const;
Fills the vector with the names of all files in the directory.
list
void list(
std::vector < File > & files
) const;
Fills the vector with the names of all files in the directory.
moveTo
void moveTo(
const std::string & path
);
Copies the file (or directory) to the given path and removes the original file. The target path can be a directory.
operator != 
bool operator != (
const File & file
) const;
operator <
bool operator < (
const File & file
) const;
operator <=
bool operator <= (
const File & file
) const;
operator =
File & operator = (
const File & file
);
Assignment operator.
operator =
File & operator = (
const std::string & path
);
Assignment operator.
operator =
File & operator = (
const char * path
);
Assignment operator.
operator =
File & operator = (
const Path & path
);
Assignment operator.
operator ==
bool operator == (
const File & file
) const;
operator >
bool operator > (
const File & file
) const;
operator >=
bool operator >= (
const File & file
) const;
path
const std::string & path() const;
Returns the path.
remove
void remove(
bool recursive = false
);
Deletes the file. If recursive is true and the file is a directory, recursively deletes all files in the directory.
renameTo
void renameTo(
const std::string & path
);
Renames the file to the new name.
setExecutable
File & setExecutable(
bool flag = true
);
Makes the file executable (if flag is true), or non-executable (if flag is false) by setting the file's permission bits accordingly.
Does nothing on Windows and OpenVMS.
setLastModified
File & setLastModified(
const Timestamp & ts
);
Sets the modification date of the file.
setReadOnly
File & setReadOnly(
bool flag = true
);
Makes the file non-writeable (if flag is true), or writeable (if flag is false) by setting the file's flags in the filesystem accordingly.
setSize
File & setSize(
FileSize size
);
Sets the size of the file in bytes. Can be used to truncate a file.
setWriteable
File & setWriteable(
bool flag = true
);
Makes the file writeable (if flag is true), or non-writeable (if flag is false) by setting the file's flags in the filesystem accordingly.
swap
void swap(
File & file
);
Swaps the file with another one.
copyDirectory 
void copyDirectory(
const std::string & path
) const;
Copies a directory. Used internally by copyTo().