Provided by: manpages-dev_2.17-1_all
mmap2 - map files or devices into memory
_syscall6(void *, mmap2, 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,
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).
On success, mmap2() returns a pointer to the mapped area. On error -1
is returned and errno is set appropriately.
EFAULT Problem with getting the data from userspace.
The function mmap2() is available since Linux 2.3.31. It is Linux
specific, and should be avoided in portable applications. See also the
mmap64() function that is part of the LFS (Large File Summit).
getpagesize(2), mmap(2), mremap(2), msync(2), shm_open(2)