#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/param.h>

int main(int argc, char **argv)
{

	char	*cwd=argv[1];
	char	path[MAXPATHLEN];
	char	ncwd[MAXPATHLEN];
	char            *argt;
	char *p;
	int	rem;


	strncpy(path, argv[2], MAXPATHLEN);
/*
 * assertion:
 *		cwd : "/" or ("/name")* where name != "." or ".."
 */
	if ( *path == '/' )
		ncwd[0]=0x00;
	else
	{
		if ( 0==strcmp( cwd, "/") )
			ncwd[0]=0x00;
		else
			strncpy(ncwd, cwd, MAXPATHLEN);
	}
	rem = MAXPATHLEN - strlen(ncwd);
	
	for(
		argt = strtok( path, "/" );
		argt != NULL;
		argt = strtok( NULL, "/" )
		)
	{
		if ( 0==strcmp( argt, ".") )
			continue;
		
		if ( 0==strcmp( argt, ".."))
		{
			if ( p = (strrchr(ncwd, (int)'/')))
			{
				*p = 0x00;
				rem = MAXPATHLEN - strlen(ncwd);
			}
		}
		else
		{
			rem -= 1 + strlen(argt);
			if ( rem > 0 )
			{
				strcat( ncwd, "/" );
				strcat( ncwd, argt );
			}
			else
			{
				errno = ENAMETOOLONG;
				return -1;
			}
		}
	}
	puts( ncwd );
	return 0;
}