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llseek() - Unix, Linux System Call
_llseek - reposition read/write file offset
int _llseek(unsigned int fd, unsigned long offset_high,
unsigned long offset_low, loff_t *result,
unsigned int whence);
The _llseek() function repositions the offset of the open file associated with the file descriptor fd to (offset_high<<32) | offset_low bytes relative to the beginning of the file, the current position in the file,
or the end of the file, depending on whether whence is SEEK_SET, SEEK_CUR, or SEEK_END, respectively.
It returns the resulting file position in the argument result.
Upon successful completion, _llseek() returns 0. Otherwise, a value of -1 is returned and errno is set to indicate the error.
|EBADF ||fd is not an open file descriptor.|
|EFAULT ||Problem with copying results to user space.|
|EINVAL ||whence is invalid.|
This function is Linux specific, and should not be used in programs intended to be portable.
Glibc does not provide a wrapper for this system call; call it using syscall(2).