Performs a write operation on an open file with arguments passed in iovec elements.
#include <sys/types.h>
#include <sys/errno.h>
int fp_writev
(fp, iov, iovcnt, ext, segflag, countp)
struct file * fp;
struct iovec * iov;
int iovcnt;
int ext;
int segflag;
int * countp;
| fp | Points to a file structure returned by the fp_open kernel service. |
| iov | Points to an array of iovec elements. Each iovec element describes a buffer containing data to be written to the file. |
| iovcnt | Specifies the number of iovec elements in an array pointed to by the iov parameter. |
| ext | Specifies an extension argument required by some device drivers. Its content, form, and use are determined by the individual driver. |
| segflag | Indicates which part of memory the information designated by the iov parameter is located in: |
| countp | Points to the location where the count of bytes actually written to the file is to be returned. |
The fp_writev kernel service is an internal interface to the function provided by the writev subroutine.
The fp_writev kernel service can be called from the process environment only.
| 0 | Indicates a successful operation. |
If an error occurs, one of the values from the /usr/include/sys/errno.h file is returned.
The writev subroutine.
Logical File System Kernel Services in AIX 5L Version 5.2 Kernel Extensions and Device Support Programming Concepts.