Thread: mmap()

Hi,

What does mapping mean? Does the mmap() function just copy the contents of a file into the calling process´s address space?

This is just a language problem. I don´t know what mapping mean.

Thanks in advance

SYNOPSIS
#include <sys/mman.h>

#ifdef _POSIX_MAPPED_FILES

void * mmap(void *start, size_t length, int prot , int
flags, int fd, off_t offset);

int munmap(void *start, size_t length);

#endif

DESCRIPTION
The mmap function asks to map length bytes starting at
offset offset from the file (or other object) specified by
the file descriptor fd into memory, preferably at address
start. This latter address is a hint only, and is usually
specified as 0. The actual place where the object is
mapped is returned by mmap, and is never 0.

More data in the rest of the manpage

Thank you, vVv. Good example