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#define _POSIX_C_SOURCE 200809L
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
int main(void)
{
const char buf[] = "THIS IS A CONSTANT STRING";
char *ptr = realloc(NULL, sizeof(buf));
memcpy(ptr, buf, sizeof(buf));
printf("%p: %s\n", ptr, ptr);
ptr = realloc(ptr, sizeof(buf) * 2);
memcpy(ptr + sizeof(buf) - 1, buf, sizeof(buf));
printf("%p: %s\n", ptr, ptr);
ptr = realloc(ptr, sizeof(buf) * sysconf(_SC_PAGESIZE));
memcpy(ptr + (2 * sizeof(buf)) - 2, buf, sizeof(buf));
printf("%p: %s\n", ptr, ptr);
}
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