1LLSEEK(2)                  Linux Programmer's Manual                 LLSEEK(2)
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NAME

6       _llseek - reposition read/write file offset
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SYNOPSIS

9       #include <sys/types.h>
10       #include <unistd.h>
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12       int _llseek(unsigned int fd, unsigned long offset_high,
13                   unsigned long offset_low, loff_t *result,
14                   unsigned int whence);
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16       Note: There is no glibc wrapper for this system call; see NOTES.
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DESCRIPTION

19       The  _llseek()  system  call  repositions  the  offset of the open file
20       description associated with the file descriptor fd to (offset_high<<32)
21       |  offset_low  bytes relative to the beginning of the file, the current
22       file offset, or the end of the file, depending  on  whether  whence  is
23       SEEK_SET,  SEEK_CUR, or SEEK_END, respectively.  It returns the result‐
24       ing file position in the argument result.
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26       This system call exists on various 32-bit platforms to support  seeking
27       to large file offsets.
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RETURN VALUE

30       Upon successful completion, _llseek() returns 0.  Otherwise, a value of
31       -1 is returned and errno is set to indicate the error.
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ERRORS

34       EBADF  fd is not an open file descriptor.
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36       EFAULT Problem with copying results to user space.
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38       EINVAL whence is invalid.
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CONFORMING TO

41       This function is Linux-specific, and should not  be  used  in  programs
42       intended to be portable.
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NOTES

45       Glibc  does  not  provide a wrapper for this system call.  To invoke it
46       directly, use syscall(2).   However,  you  probably  want  to  use  the
47       lseek(2) wrapper function instead.
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SEE ALSO

50       lseek(2), open(2), lseek64(3)
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COLOPHON

53       This  page  is  part of release 4.15 of the Linux man-pages project.  A
54       description of the project, information about reporting bugs,  and  the
55       latest     version     of     this    page,    can    be    found    at
56       https://www.kernel.org/doc/man-pages/.
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60Linux                             2017-09-15                         LLSEEK(2)
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