a trivial mmap example

data

abcdefghijklmnopqrstuvwxyz

main.c

#include <stdio.h>
#include <fcntl.h>
#include <sys/mman.h>

int main() {

  int fd = open( "data", O_RDONLY );

  char* target;
  target = mmap( NULL, 10, PROT_READ, MAP_SHARED, fd, 0 ); 

  int i;
  for(i=0; i<10; i++) {
    putchar( target[i] );
  }

  close( fd );
  return 1;
}