el_init
el = el_init("sh", el_in, el_out, el_err);
el = el_init(*argv, stdin, stdout, stderr);
EditLine *el = el_init(argv[0], stdin, stdout, stderr);
el = el_init(argv[0], stdin, stdout, stderr);
EditLine *el_init(const char *, FILE *, FILE *, FILE *);
elptr = el_init(getprogname(), stdin, stdout, stderr);
elptr = el_init(getprogname(), stdin, stdout, stderr);
el = el_init(getprogname(), stdin, ttyout, stderr);
if ((em.el = el_init(getprogname(), stdin, stdout, nullfp)) == NULL) {
elptr = el_init(getprogname(), stdin, stdout, stderr);
elptr = el_init(getprogname(), stdin, stdout, stderr);