Changes the current offset in an open file.
#include <sys/types.h> #include <sys/errno.h>
int fp_lseek ( fp, offset, whence)
struct file *fp;
off_t offset;
int whence;
int fp_llseek
( fp, offset, whence)
struct file *fp
offset_t offset;
int whence;
| fp | Points to a file structure returned by the fp_open kernel service. |
| offset | Specifies the number of bytes (positive or negative) to move the file pointer. |
| whence | Indicates how to use the offset value: |
The fp_lseek and fp_llseek kernel services are internal interfaces to the function provided by the lseek and llseek subroutines.
The fp_lseek and fp_llseek kernel services can be called from the process environment only.
| 0 | Indicates a successful operation. |
| ERRNO | Returns an error number from the /usr/include/sys/errno.h file on failure. |
The lseek, llseek subroutine.
Logical File System Kernel Services in AIX 5L Version 5.2 Kernel Extensions and Device Support Programming Concepts.