#ifndef NULL
#define NULL (void *)0
#endif
int pwd()
{
	char *getcwd();
	register char *dir;
	char *dirfix;
	if (!(dir = getcwd(NULL,256)))
	{
		perror("pwd");
		return -1;
	}
	/* change backslashes to forward slashes */
	for (dirfix = dir; *dirfix; dirfix++)
		*dirfix = (*dirfix == '\\' ? '/' : tolower(*dirfix));
	write(1,"/",1);
	write(1,dir,strlen(dir));
	crlf();
	if (dir)
		free(dir);
	return 0;
}