#define _GNU_SOURCE
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#include<stdio.h>
#include <unistd.h>
int main()
{
char buff[512];
int f = open("text.txt", O_RDONLY);
posix_fadvise(f, 20,20,POSIX_FADV_RANDOM);
read(f,buff,512);
buff[512] ='\0';
printf("%s \n", buff);
close(f);
return 0;
}
The function posix_memalign() allocates size bytes and places the address of the allocated memory in *memptr. The address of the allocated memory will be a multiple of alignment, which must be a power of two and a multiple of sizeof(void *). If the size is 0, then posix_memalign() returns either NULL or a unique pointer value that can later successfully pass to free(3) The function posix_memalign() allocates size bytes and places the address of the allocated memory in *memptr. The address of the allocated
