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llseek(2) - phpMan

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LLSEEK(2)                           Linux Programmer's Manual                           LLSEEK(2)



NAME
       _llseek - reposition read/write file offset

SYNOPSIS
       #include <sys/types.h>
       #include <unistd.h>

       int _llseek(unsigned int fd, unsigned long offset_high,
                   unsigned long offset_low, loff_t *result,
                   unsigned int whence);

       Note: There is no glibc wrapper for this system call; see NOTES.

DESCRIPTION
       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.

RETURN VALUE
       Upon successful completion, _llseek() returns 0.  Otherwise, a value of -1 is returned and
       errno is set to indicate the error.

ERRORS
       EBADF  fd is not an open file descriptor.

       EFAULT Problem with copying results to user space.

       EINVAL whence is invalid.

CONFORMING TO
       This function is Linux-specific, and should not be used in programs intended to be  porta‐
       ble.

NOTES
       Glibc does not provide a wrapper for this system call; call it using syscall(2).

SEE ALSO
       lseek(2), lseek64(3)

COLOPHON
       This  page  is  part of release 3.74 of the Linux man-pages project.  A description of the
       project, information about reporting bugs, and the latest version of  this  page,  can  be
       found at http://www.kernel.org/doc/man-pages/.



Linux                                       2012-07-13                                  LLSEEK(2)


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