개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

lseek64(3)

LSEEK64(3)                 Linux Programmer's Manual                LSEEK64(3)

NAME
       lseek64 - reposition 64-bit read/write file offset

SYNOPSIS
       #define _LARGEFILE64_SOURCE     /* See feature_test_macros(7) */
       #include <sys/types.h>
       #include <unistd.h>

       off64_t lseek64(int fd, off64_t offset, int whence);

DESCRIPTION
       The lseek(2) family of functions reposition the offset of the open file
       associated  with the file descriptor fd to offset bytes relative to the
       start, current position, or end of the file, when whence has the  value
       SEEK_SET, SEEK_CUR, or SEEK_END, respectively.

       For more details, return value, and errors, see lseek(2).

       Four  interfaces  are  available:  lseek(2),  lseek64(), llseek(2), and
       _llseek(2).

   lseek()
       Prototype:

           off_t lseek(int fd, off_t offset, int whence);

       lseek(2) uses the type off_t.  This is a 32-bit signed type  on  32-bit
       architectures, unless one compiles with

           #define _FILE_OFFSET_BITS 64

       in which case it is a 64-bit signed type.

   lseek64()
       Prototype:

           off64_t lseek64(int fd, off64_t offset, int whence);

       The  library  routine lseek64() uses a 64-bit type even when off_t is a
       32-bit type.  Its prototype (and the type off64_t)  is  available  only
       when one compiles with

           #define _LARGEFILE64_SOURCE

       The  function lseek64() is available since glibc 2.1, and is defined to
       be an alias for llseek().

   llseek()
       Prototype:

           loff_t llseek(int fd, loff_t offset, int whence);

       The type loff_t is a 64-bit signed type.  The library routine  llseek()
       is  available in glibc and works without special defines.  However, the
       glibc headers do not provide a prototype.  Users should add  the  above
       prototype,  or  something  equivalent, to their own source.  When users
       complained about data loss caused by  a  miscompilation  of  e2fsck(8),
       glibc 2.1.3 added the link-time warning

           "the `llseek´ function may be dangerous; use `lseek64´ instead."

       This  makes this function unusable if one desires a warning-free compi‐
       lation.

   _llseek()
       On 32-bit architectures, this is the system call that is used to imple‐
       ment all of the above functions.  The prototype is:

           int _llseek(int fd, off_t offset_hi, off_t offset_lo,
                       loff_t *result, int whence);

       For more details, see llseek(2).

       64-bit systems don't need an _llseek() system call.  Instead, they have
       an lseek(2) system call that supports 64-bit file offsets.

ATTRIBUTES
       For an explanation of the terms  used  in  this  section,  see  attrib‐
       utes(7).   allbox;  lb  lb  lb  l  l  l.   Interface Attribute Value T{
       lseek64() T}   Thread safety  MT-Safe

SEE ALSO
       llseek(2), lseek(2)

COLOPHON
       This page is part of release 5.02 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
       https://www.kernel.org/doc/man-pages/.

Linux                             2017-09-15                        LSEEK64(3)