#include <stdio.h>
#include <stdlib.h>
#include <string.h>

main(
	int     argc,
	char    *argv[]
	)
{
	char	eoi=' ';

        extern char     *optarg;
        extern int      optind,opterr,optopt;
        int     opcion;
	unsigned char theError=0;

	
        while ( (opcion=getopt(argc,argv,"c:")) != EOF )
        {
                switch(opcion)
                {
                        case 'c':       
                                        eoi = *optarg;
                                        break;


                        default:       theError ++;
                                        break;
                }
        }

        if ( theError != 0 ) 
        {
	fprintf( stderr, "Usage: %s -c end_of_input\n", argv[0]);
	exit(-1);
        }
	
	/*
	 * set raw mode 
	 */

	setvbuf(stdin,NULL,_IONBF,(size_t)0);
	setvbuf(stdout,NULL,_IONBF,(size_t)0);

	/*
	 * cat
	 */

	for( ; putchar(getchar())!=eoi; )
	;

	fflush(stdout);

	exit( 0 );
}