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#include <stdlib.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <string.h>
#ifndef MAP_NORESERVE
#define MAP_NORESERVE 0
#endif
volatile char ch;
main(){
struct stat statbuf;
uchar *buf;
fstat(0, &statbuf);
buf = mmap(NULL, statbuf.st_size, PROT_READ, MAP_SHARED|MAP_NORESERVE,
0, 0);
if(buf != (uchar*)(-1)){
uchar *cur, *lim = &buf[statbuf.st_size];
for(cur = buf; buf != lim; ++cur){
ch = *cur;
}
munmap(buf, statbuf.st_size);
}
}