glibmm  2.76.0
Classes | Functions
File Utilities

Various file-related classes and functions. More...

Classes

class  Glib::FileError
 Exception class for file-related errors. More...
 
class  Glib::DirIterator
 The iterator type of Glib::Dir. More...
 
class  Glib::Dir
 Utility class representing an open directory. More...
 

Functions

bool Glib::file_test (const std::string & filename, FileTest test)
 Returns true if any of the tests in the bitfield test are true. More...
 
int Glib::mkstemp (std::string & filename_template)
 Opens a temporary file. More...
 
int Glib::file_open_tmp (std::string & name_used, const std::string & prefix)
 Opens a file for writing in the preferred directory for temporary files (as returned by Glib::get_tmp_dir()). More...
 
int Glib::file_open_tmp (std::string & name_used)
 Opens a file for writing in the preferred directory for temporary files (as returned by Glib::get_tmp_dir()). More...
 
std::string Glib::file_get_contents (const std::string & filename)
 Reads an entire file into a string, with good error checking. More...
 

Detailed Description

Various file-related classes and functions.

Function Documentation

◆ file_get_contents()

std::string Glib::file_get_contents ( const std::string filename)

Reads an entire file into a string, with good error checking.

Parameters
filenameA file to read contents from.
Returns
The file contents.
Exceptions
Glib::FileError

◆ file_open_tmp() [1/2]

int Glib::file_open_tmp ( std::string name_used)

Opens a file for writing in the preferred directory for temporary files (as returned by Glib::get_tmp_dir()).

This function works like file_open_tmp(std::string&, const std::string&) but uses a default basename prefix.

Parameters
[out]name_usedThe actual name used.
Returns
A file handle (as from open()) to the file opened for reading and writing. The file is opened in binary mode on platforms where there is a difference. The file handle should be closed with close().
Exceptions
Glib::FileError

◆ file_open_tmp() [2/2]

int Glib::file_open_tmp ( std::string name_used,
const std::string prefix 
)

Opens a file for writing in the preferred directory for temporary files (as returned by Glib::get_tmp_dir()).

prefix should a basename template; it'll be suffixed by 6 characters in order to form a unique filename. No directory components are allowed.

The actual name used is returned in name_used.

Parameters
[out]name_usedThe actual name used.
prefixTemplate for file name, basename only.
Returns
A file handle (as from open()) to the file opened for reading and writing. The file is opened in binary mode on platforms where there is a difference. The file handle should be closed with close().
Exceptions
Glib::FileError

◆ file_test()

bool Glib::file_test ( const std::string filename,
FileTest  test 
)

Returns true if any of the tests in the bitfield test are true.

For example, (Glib::FILE_TEST_EXISTS | Glib::FILE_TEST_IS_DIR) will return true if the file exists; the check whether it's a directory doesn't matter since the existence test is true. With the current set of available tests, there's no point passing in more than one test at a time.

Apart from Glib::FILE_TEST_IS_SYMLINK all tests follow symbolic links, so for a symbolic link to a regular file file_test() will return true for both Glib::FILE_TEST_IS_SYMLINK and Glib::FILE_TEST_IS_REGULAR.

Note
For a dangling symbolic link file_test() will return true for Glib::FILE_TEST_IS_SYMLINK and false for all other flags.
Parameters
filenameA filename to test.
testBitfield of Glib::FileTest flags.
Returns
Whether a test was true.

◆ mkstemp()

int Glib::mkstemp ( std::string filename_template)

Opens a temporary file.

See the mkstemp() documentation on most UNIX-like systems. This is a portability wrapper, which simply calls mkstemp() on systems that have it, and implements it in GLib otherwise.

Parameters
filename_templateA string that should match the rules for mkstemp(), i.e. end in "XXXXXX". The X string will be modified to form the name of a file that didn't exist.
Returns
A file handle (as from open()) to the file opened for reading and writing. The file is opened in binary mode on platforms where there is a difference. The file handle should be closed with close(). In case of errors, -1 is returned.