#include <file.h>
Public Member Functions | |
| FileBase (intrusive_ref_ptr< FilesystemBase > parent) | |
| virtual ssize_t | write (const void *data, size_t len)=0 |
| virtual ssize_t | read (void *data, size_t len)=0 |
| virtual off_t | lseek (off_t pos, int whence)=0 |
| virtual int | fstat (struct stat *pstat) const =0 |
| virtual int | isatty () const |
| virtual int | fcntl (int cmd, int opt) |
| virtual int | ioctl (int cmd, void *arg) |
| virtual int | getdents (void *dp, int len) |
| const intrusive_ref_ptr< FilesystemBase > | getParent () const |
| virtual | ~FileBase () |
Additional Inherited Members | |
 Protected Member Functions inherited from miosix::IntrusiveRefCounted | |
| IntrusiveRefCounted () | |
| IntrusiveRefCounted (const IntrusiveRefCounted &) | |
| IntrusiveRefCounted & | operator= (const IntrusiveRefCounted &) |
Detailed Description
The unix file abstraction. Also some device drivers are seen as files. Classes of this type are reference counted, must be allocated on the heap and managed through intrusive_ref_ptr<FileBase>
Constructor & Destructor Documentation
| miosix::FileBase::FileBase | ( | intrusive_ref_ptr< FilesystemBase > | parent | ) |
Constructor
- Parameters
-
parent the filesystem to which this file belongs
|
virtual |
File destructor
Member Function Documentation
|
virtual |
Perform various operations on a file descriptor
- Parameters
-
cmd specifies the operation to perform opt optional argument that some operation require
- Returns
- the exact return value depends on CMD, -1 is returned on error
|
pure virtual |
Return file information.
- Parameters
-
pstat pointer to stat struct
- Returns
- 0 on success, or a negative number on failure
Implemented in miosix::DirectoryBase, and miosix::TerminalDevice.
|
virtual |
Also directories can be opened as files. In this case, this system call allows to retrieve directory entries.
- Parameters
-
dp pointer to a memory buffer where one or more struct dirent will be placed. dp must be four words aligned. len memory buffer size.
- Returns
- the number of bytes read on success, or a negative number on failure.
|
inline |
- Returns
- a pointer to the parent filesystem
|
virtual |
Perform various operations on a file descriptor
- Parameters
-
cmd specifies the operation to perform arg optional argument that some operation require
- Returns
- the exact return value depends on CMD, -1 is returned on error
Reimplemented in miosix::TerminalDevice.
|
virtual |
Check whether the file refers to a terminal.
- Returns
- 1 if it is a terminal, 0 if it is not, or a negative number in case of errors
Reimplemented in miosix::TerminalDevice.
|
pure virtual |
Move file pointer, if the file supports random-access.
- Parameters
-
pos offset to sum to the beginning of the file, current position or end of file, depending on whence whence SEEK_SET, SEEK_CUR or SEEK_END
- Returns
- the offset from the beginning of the file if the operation completed, or a negative number in case of errors
Implemented in miosix::DirectoryBase, and miosix::TerminalDevice.
|
pure virtual |
Read data from the file, if the file supports reading.
- Parameters
-
data buffer to store read data len the number of bytes to read
- Returns
- the number of read characters, or a negative number in case of errors
Implemented in miosix::DirectoryBase, and miosix::TerminalDevice.
|
pure virtual |
Write data to the file, if the file supports writing.
- Parameters
-
data the data to write len the number of bytes to write
- Returns
- the number of written characters, or a negative number in case of errors
Implemented in miosix::DirectoryBase, and miosix::TerminalDevice.
The documentation for this class was generated from the following files:
- file.h
- file.cpp
