/* kreator, 1998.
 * mmaping session */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>

caddr_t mmapptr;
struct stat buf;

void fatal(char *msg)
{
	puts(msg);
	exit(EXIT_FAILURE);
}

void termination_handler(int signum)
{
	munmap(mmapptr, buf.st_size);
	fatal("exiting gracefully.");
}

int main(int argc, char **argv)
{
	int fd, i;

	if (argc<2) fatal("wrong params.");

	if (signal(SIGINT, termination_handler)==SIG_IGN)
		signal(SIGINT, SIG_IGN);
	if (signal(SIGHUP, termination_handler)==SIG_IGN)
		signal(SIGHUP, SIG_IGN);
	if (signal(SIGTERM, termination_handler)==SIG_IGN)
		signal(SIGTERM, SIG_IGN);
	if (signal(SIGKILL, termination_handler)==SIG_IGN)
		signal(SIGKILL, SIG_IGN);
	if (signal(SIGQUIT, termination_handler)==SIG_IGN)
		signal(SIGQUIT, SIG_IGN);

	for(i=1; i<argc; ++i)
	{
		if ((fd=open(argv[i], O_RDONLY, S_IRUSR))==-1)
			fatal("error opening input file.");
		fstat(fd, &buf);
		if ((mmapptr=mmap(0, buf.st_size, PROT_READ, 
			MAP_SHARED, fd, 0))==-1)
		fatal("error mapping file into memory.");
		close(fd);
		puts(mmapptr);
		munmap(mmapptr, buf.st_size);
	}
	return(EXIT_SUCCESS);
}