parse_user_host_path
int parse_user_host_path(const char *, char **, char **, char **);
if (parse_user_host_path(argv[argc - 1], &tuser, &thost,
parse_user_host_path(argv[i], &suser, &host, &src);
parse_user_host_path(argv[i], &suser, &host, &src);
if (parse_user_host_path(*argv, &user, &host,