Kernel

Detailed Description

Exports for Kernel.

---

Using this library in your project

Include the header file in your project:

#include <psp2kern/io/fcntl.h> 

Link the library to the executable:

SceIofilemgrForDriver_stub 

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Functions
SceUID	ksceIoOpen (const char *file, int flags, SceMode mode)
	Open or create a file for reading or writing. More...
int	ksceIoClose (SceUID fd)
	Delete a descriptor. More...
int	ksceIoRead (SceUID fd, void *data, SceSize size)
	Read input. More...
int	ksceIoPread (SceUID fd, void *data, SceSize size, SceOff offset)
	Read input at offset. More...
int	ksceIoWrite (SceUID fd, const void *data, SceSize size)
	Write output. More...
int	ksceIoPwrite (SceUID fd, const void *data, SceSize size, SceOff offset)
	Write output at offset. More...
SceOff	ksceIoLseek (SceUID fd, SceOff offset, int whence)
	Reposition read/write file descriptor offset. More...
int	ksceIoRemove (const char *file)
	Remove directory entry. More...
int	ksceIoRename (const char *oldname, const char *newname)
	Change the name of a file. More...
int	ksceIoSync (const char *device, unsigned int unk)
	Synchronize the file data on the device. More...
int	ksceIoSyncByFd (SceUID fd)
	Synchronize the file data for one file. More...

Function Documentation

ksceIoOpen()

SceUID ksceIoOpen	(	const char *	file,
		int	flags,
		SceMode	mode
	)

Open or create a file for reading or writing.

Example1: Open a file for reading

if(!(fd = ksceIoOpen("device:/path/to/file", SCE_O_RDONLY, 0777)) {
 // error
}

Example2: Open a file for writing, creating it if it doesn't exist

if(!(fd = ksceIoOpen("device:/path/to/file", SCE_O_WRONLY|SCE_O_CREAT, 0777)) {
 // error
}

Parameters

file	- Pointer to a string holding the name of the file to open
flags	- Libc styled flags that are or'ed together
mode	- File access mode (One or more SceIoMode).

Returns

A non-negative integer is a valid fd, anything else an error

ksceIoClose()

int ksceIoClose

(

SceUID

fd

)

Delete a descriptor.

ksceIoClose(fd);

Parameters

fd	- File descriptor to close

Returns

< 0 on error

ksceIoRead()

int ksceIoRead	(	SceUID	fd,
		void *	data,
		SceSize	size
	)

Read input.

Example:

bytes_read = ksceIoRead(fd, data, 100);

Parameters

fd	- Opened file descriptor to read from
data	- Pointer to the buffer where the read data will be placed
size	- Size of the read in bytes

Returns

The number of bytes read

ksceIoPread()

int ksceIoPread	(	SceUID	fd,
		void *	data,
		SceSize	size,
		SceOff	offset
	)

Read input at offset.

Example:

bytes_read = ksceIoPread(fd, data, 100, 0x1000);

Parameters

fd	- Opened file descriptor to read from
data	- Pointer to the buffer where the read data will be placed
size	- Size of the read in bytes
offset	- Offset to read

Returns

< 0 on error.

ksceIoWrite()

int ksceIoWrite	(	SceUID	fd,
		const void *	data,
		SceSize	size
	)

Write output.

Example:

bytes_written = ksceIoWrite(fd, data, 100);

Parameters

fd	- Opened file descriptor to write to
data	- Pointer to the data to write
size	- Size of data to write

Returns

The number of bytes written

ksceIoPwrite()

int ksceIoPwrite	(	SceUID	fd,
		const void *	data,
		SceSize	size,
		SceOff	offset
	)

Write output at offset.

Example:

bytes_written = ksceIoPwrite(fd, data, 100, 0x1000);

Parameters

fd	- Opened file descriptor to write to
data	- Pointer to the data to write
size	- Size of data to write
offset	- Offset to write

Returns

The number of bytes written

ksceIoLseek()

SceOff ksceIoLseek	(	SceUID	fd,
		SceOff	offset,
		int	whence
	)

Reposition read/write file descriptor offset.

Example:

pos = ksceIoLseek(fd, -10, SCE_SEEK_END);

Parameters

fd	- Opened file descriptor with which to seek
offset	- Relative offset from the start position given by whence
whence	- One of SceIoSeekMode.

Returns

The position in the file after the seek.

ksceIoRemove()

int ksceIoRemove

(

const char *

file

)

Remove directory entry.

Parameters

file	- Path to the file to remove

Returns

< 0 on error

ksceIoRename()

int ksceIoRename	(	const char *	oldname,
		const char *	newname
	)

Change the name of a file.

Parameters

oldname	- The old filename
newname	- The new filename

Returns

< 0 on error.

ksceIoSync()

int ksceIoSync	(	const char *	device,
		unsigned int	unk
	)

Synchronize the file data on the device.

Parameters

device	- The device to synchronize (e.g. msfat0:)
unk	- Unknown

ksceIoSyncByFd()

int ksceIoSyncByFd

(

SceUID

fd

)

Synchronize the file data for one file.

Parameters

fd	- Opened file descriptor to sync

Returns

< 0 on error.