File System Interface

FTP client functions that work with a File System. More...

Functions
void *	netFTPc_fopen (const char *fname, const char *mode)
	Open local file for reading or writing in FTP client. [interface].
void	netFTPc_fclose (void *file)
	Close local file previously open in FTP client. [interface].
uint32_t	netFTPc_fread (void *file, uint8_t *buf, uint32_t len)
	Read block of data from local file in FTP client. [interface].
uint32_t	netFTPc_fwrite (void *file, const uint8_t *buf, uint32_t len)
	Write block of data to local file in FTP client. [interface].

Description

FTP client functions that work with a File System.

All functions of the File System Interface are located in FTP_Client_FS.c, which is automatically added to the Network folder of your project. The file is preconfigured for the , so no changes are required. If you want to use a different type of file system, you must add a similar file to your project and implement the interface functions yourself.

The following functions are implemented in this module:

• netFTPc_fopen - open a file for reading or writing.
• netFTPc_fclose - close a file that was previously opened.
• netFTPc_fread - read a block of data from a file to the FTP data buffer.
• netFTPc_fwrite - write a block of data from the FTP data buffer to a file.

Function Documentation

netFTPc_fclose()

void netFTPc_fclose

(

void *

file

)

Close local file previously open in FTP client. [interface].

Parameters

[in]

file

pointer to the file to close.

The function netFTPc_fclose closes the file identified by the file stream pointer.

The function interfaces to the File System Component and will be called by the Network Component automatically. If another file system will be used, refer to the reference implementation in the FTP_Client_FS.c module.

netFTPc_fopen()

void * netFTPc_fopen	(	const char *	fname,
		const char *	mode
	)

Open local file for reading or writing in FTP client. [interface].

Parameters

[in]	fname	name of the file to open.
[in]	mode	type of access: "rb" = opens a file for reading. "wb" = opens a file for writing.

Returns

status information:

• Pointer to an open file.
• NULL in case of an error.

The function netFTPc_fopen opens a local file for reading or writing.

The argument mode defines the type of access permitted for the file fname. It can have one of the following values:

Mode	Description
"rb"	Opens the file for reading. If the file does not exist, fopen fails.
"wb"	Opens an empty file for writing. If the file already exists, its contents are cleared.

The function interfaces to the File System Component and will be called by the Network Component automatically. If another file system will be used, refer to the reference implementation in the FTP_Client_FS.c module.

netFTPc_fread()

uint32_t netFTPc_fread	(	void *	file,
		uint8_t *	buf,
		uint32_t	len
	)

Read block of data from local file in FTP client. [interface].

Parameters

[in]	file	pointer to the file to read from.
[out]	buf	block of memory to write data to.
[in]	len	length of data to read in bytes.

Returns

number of bytes successfully read.

The function netFTPc_fread reads len bytes from the file identified by the file stream pointer in the function argument.

The argument buf is a pointer to the buffer where the function stores the data read from the file.

The function interfaces to the File System Component and will be called by the Network Component automatically. If another file system will be used, refer to the reference implementation in the FTP_Client_FS.c module.

Note

The function must read len bytes. The FTP client stops reading and closes the file if the return value is less than len bytes.

netFTPc_fwrite()

uint32_t netFTPc_fwrite	(	void *	file,
		const uint8_t *	buf,
		uint32_t	len
	)

Write block of data to local file in FTP client. [interface].

Parameters

[in]	file	pointer to the file to write to.
[in]	buf	block of memory to be written.
[in]	len	length of data to write in bytes.

Returns

number of bytes successfully written.

The function netFTPc_fwrite writes a block of data to the file identified by the file stream pointer.

The argument buf points to the buffer containing the data that is to be written to the file.

The argument len specifies the number of bytes to be written to the file.

The function interfaces to the File System Component and will be called by the Network Component automatically. If another file system will be used, refer to the reference implementation in the FTP_Client_FS.c module.

Note

The function must write len bytes. The FTP client stops writing, aborts data transfer and closes the FTP session if the return value is less than len bytes.