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Dir Class Reference
Public Member Functions

Dir Class Reference
[Filesystem]

Dir class. More...

#include <Dir.h>

Inherits mbed::DirHandle.

Public Member Functions

 Dir ()
 Create an uninitialized directory.
 Dir (FileSystem *fs, const char *path)
 Open a directory on a filesystem.
virtual ~Dir ()
 Destroy a file.
virtual int open (FileSystem *fs, const char *path)
 Open a directory on the filesystem.
virtual int close ()
 Close a directory.
virtual ssize_t read (struct dirent *ent)
 Read the next directory entry.
virtual void seek (off_t offset)
 Set the current position of the directory.
virtual off_t tell ()
 Get the current position of the directory.
virtual void rewind ()
 Rewind the current position to the beginning of the directory.
virtual size_t size ()
 Get the sizeof the directory.
 MBED_DEPRECATED_SINCE ("mbed-os-5.4","Replaced by DirHandle::close") virtual int closedir()
 Closes the directory.
 MBED_DEPRECATED_SINCE ("mbed-os-5.4","Replaced by DirHandle::read") virtual struct dirent *readdir()
 Return the directory entry at the current position, and advances the position to the next entry.
 MBED_DEPRECATED_SINCE ("mbed-os-5.4","Replaced by DirHandle::rewind") virtual void rewinddir()
 Resets the position to the beginning of the directory.
 MBED_DEPRECATED_SINCE ("mbed-os-5.4","Replaced by DirHandle::tell") virtual off_t telldir()
 Returns the current position of the DirHandle.
 MBED_DEPRECATED_SINCE ("mbed-os-5.4","Replaced by DirHandle::seek") virtual void seekdir(off_t location)
 Sets the position of the DirHandle.

Detailed Description

Dir class.

Definition at line 30 of file Dir.h.

Constructor & Destructor Documentation

Dir (  )

Create an uninitialized directory.

Must call open to initialize the directory on a file system

Definition at line 22 of file Dir.cpp.

Dir ( FileSystem *  fs,
const char *  path 
)

Open a directory on a filesystem.

Parameters:
fsFilesystem as target for a directory
pathName of the directory to open

Definition at line 27 of file Dir.cpp.

~Dir (  ) [virtual]

Destroy a file.

Closes file if the file is still open

Definition at line 33 of file Dir.cpp.

Member Function Documentation

int close ( void   ) [virtual]

Close a directory.

Returns:
0 on success, negative error code on failure

Implements DirHandle.

Definition at line 54 of file Dir.cpp.

MBED_DEPRECATED_SINCE ( "mbed-os-5.4"  ,
"Replaced by DirHandle::close"   
) [inherited]

Closes the directory.

Returns:
0 on success, -1 on error.

Definition at line 110 of file DirHandle.h.

MBED_DEPRECATED_SINCE ( "mbed-os-5.4"  ,
"Replaced by DirHandle::tell"   
) [inherited]

Returns the current position of the DirHandle.

Returns:
the current position, -1 on error.

Definition at line 148 of file DirHandle.h.

MBED_DEPRECATED_SINCE ( "mbed-os-5.4"  ,
"Replaced by DirHandle::read"   
) [inherited]

Return the directory entry at the current position, and advances the position to the next entry.

Returns:
A pointer to a dirent structure representing the directory entry at the current position, or NULL on reaching end of directory or error.

Definition at line 125 of file DirHandle.h.

MBED_DEPRECATED_SINCE ( "mbed-os-5.4"  ,
"Replaced by DirHandle::rewind"   
) [inherited]

Resets the position to the beginning of the directory.

Definition at line 135 of file DirHandle.h.

MBED_DEPRECATED_SINCE ( "mbed-os-5.4"  ,
"Replaced by DirHandle::seek"   
) [inherited]

Sets the position of the DirHandle.

Parameters:
locationThe location to seek to. Must be a value returned by telldir.

Definition at line 159 of file DirHandle.h.

int open ( FileSystem *  fs,
const char *  path 
) [virtual]

Open a directory on the filesystem.

Parameters:
fsFilesystem as target for a directory
pathName of the directory to open
Returns:
0 on success, negative error code on failure

Definition at line 40 of file Dir.cpp.

ssize_t read ( struct dirent *  ent ) [virtual]

Read the next directory entry.

Parameters:
entThe directory entry to fill out
Returns:
1 on reading a filename, 0 at end of directory, negative error on failure

Implements DirHandle.

Definition at line 65 of file Dir.cpp.

void rewind (  ) [virtual]

Rewind the current position to the beginning of the directory.

Implements DirHandle.

Definition at line 84 of file Dir.cpp.

void seek ( off_t  offset ) [virtual]

Set the current position of the directory.

Parameters:
offsetOffset of the location to seek to, must be a value returned from tell

Implements DirHandle.

Definition at line 72 of file Dir.cpp.

size_t size (  ) [virtual]

Get the sizeof the directory.

Returns:
Number of files in the directory

Reimplemented from DirHandle.

Definition at line 90 of file Dir.cpp.

off_t tell (  ) [virtual]

Get the current position of the directory.

Returns:
Position of the directory that can be passed to rewind

Implements DirHandle.

Definition at line 78 of file Dir.cpp.

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