A small dumb challenge

argv.c

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

int main(int _, char** argv)
{
	FILE* f;
	munmap((void*) ((long)argv[0] & ~0xfff), 1);

	if(f = fopen("flag", "rb"))
	{
		fgets(argv[0], 32, f);
		fclose(f);
	}
	pause();
}