#include <bspacm/newlib/fdops.h>

Data Fields
int(*	op_close )(struct sBSPACMnewlibFDOPSfile *fp)

int(*	op_fstat )(struct sBSPACMnewlibFDOPSfile fp, struct stat buf)

int(*	op_isatty )(struct sBSPACMnewlibFDOPSfile *fp)

off_t(*	op_lseek )(struct sBSPACMnewlibFDOPSfile *fp, off_t offset, int whence)

ssize_t(*	op_read )(struct sBSPACMnewlibFDOPSfile fp, void buf, size_t count)

ssize_t(*	op_write )(struct sBSPACMnewlibFDOPSfile fp, const void buf, size_t count)

int(*	op_ioctl )(struct sBSPACMnewlibFDOPSfile *fp, int request, va_list ap)

Detailed Description

Record for the implementations of file descriptor operations that are supported for a particular class of device.

Each operation has the standard POSIX environment interface and semantics, except that a hBSPACMnewlibFDOPSfile is passed instead of a descriptor.

The pointer to any operation may be null; if the corresponding operation is invoked the wrapper function will return an error after setting errno to EBADF (generally; some operations may use an alternative error code).

Field Documentation

int(* sBSPACMnewlibFDOPSfileOps::op_close) (struct sBSPACMnewlibFDOPSfile *fp)

Release all resources associated with the file.

In most cases, fBSPACMnewlibFDOPSdriver() will dynamically allocate a sBSPACMnewlibFDOPSfile instance. This operation is the one that must free that memory.

If unimplemented, close() fails with ENOSYS.

Note: Even if this operation is not implemented, invoking close() on the corresponding descriptor will remove the descriptor from xBSPACMnewlibFDOPSfile_.

int(* sBSPACMnewlibFDOPSfileOps::op_fstat) (struct sBSPACMnewlibFDOPSfile *fp, struct stat *buf)

Implementation for fstat(). If unimplemented, fstat() fails with ENOSYS.

int(* sBSPACMnewlibFDOPSfileOps::op_ioctl) (struct sBSPACMnewlibFDOPSfile *fp, int request, va_list ap)

Implementation for ioctl().

int(* sBSPACMnewlibFDOPSfileOps::op_isatty) (struct sBSPACMnewlibFDOPSfile *fp)

Implementation for isatty(). If unimplemented, isatty() fails with ENOTTY.

Note: A successful isatty() call returns 1; a failed call returns zero after setting errno. Do not return -1 from this implementation.

off_t(* sBSPACMnewlibFDOPSfileOps::op_lseek) (struct sBSPACMnewlibFDOPSfile *fp, off_t offset, int whence)

Implementation for lseek(). If unimplemented, lseek() fails with ENOSYS.

ssize_t(* sBSPACMnewlibFDOPSfileOps::op_read) (struct sBSPACMnewlibFDOPSfile *fp, void *buf, size_t count)

Implementation for read(). If unimplemented, read() fails with EBADF.

ssize_t(* sBSPACMnewlibFDOPSfileOps::op_write) (struct sBSPACMnewlibFDOPSfile *fp, const void *buf, size_t count)

Implementation for write(). If unimplemented, read() fails with EBADF.

The documentation for this struct was generated from the following file:

include/bspacm/newlib/fdops.h

Data Fields

Detailed Description

Field Documentation