mmap2

MMAP2(2)                   Linux Programmer's Manual                  MMAP2(2)



NAME
       mmap2 - map files or devices into memory

SYNOPSIS
       #include <sys/mman.h>
       #include <syscall.h>

       _syscall6(void  *,  start,  size_t, length, int, prot, int, flags, int,
       fd, off_t, pgoffset);

       void * mmap2(void *start, size_t length, int prot, int flags,  int  fd,
       off_t pgoffset);

       #endif

DESCRIPTION
       The  function mmap2 operates in exactly the same way as mmap(2), except
       that the final argument specifies the offset into the file in units  of
       the  system  page  size  (instead of bytes).  This enables applications
       that use a 32-bit off_t to map  larger  files  (typically  up  to  2^44
       bytes).

NOTES
       The  function  mmap2 is available since Linux 2.3.31.  It is Linux spe-
       cific, and should be avoided in portable applications.   See  also  the
       mmap64() function that is part of the LFS (Large File Summit).

SEE ALSO
       getpagesize(2), mmap(2), mremap(2), msync(2), shm_open(2)



Linux 2.3.31                      2002-01-31                          MMAP2(2)