#include <u.h>
#include <libc.h>
void
main(int, char**){
	vlong u, a, n;
	uchar *l, *r, *b = nil;
	a = u = 0;
	while(9){
		if(a - u < 1024UL){
			b = realloc(b, a += 0x100000UL);
			if(b == nil)
				sysfatal("realloc: %r");
		}
		n = read(0, b + u, a - u);
		if(n < 1)
			break;
		u += n;
	}
	if(n)
		sysfatal("read: %r");
	if(u & 3)
		sysfatal("read not a multiple of four bytes");
	b = realloc(b, u);
	if(b == nil)
		sysfatal("realloc: %r");
	l = b;
	r = b + u - 4;
	while(l < r){
		for(n = 0; n < 4; n++){
			a = l[n];
			l[n] = r[n];
			r[n] = a;
		}
		l += 4;
		r -= 4;
	}
	if(write(1, b, u) != u)
		sysfatal("write: %r");
	exits(nil);
}