el_init
el = el_init(*argv, stdin, stdout, stderr);
EditLine *el_init(const char *, FILE *, FILE *, FILE *);
e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr);
elptr = el_init(__progname, stdin, stdout, stderr);
el = el_init("bc", stdin, stderr, stderr);
el = el_init(__progname, stdin, stdout, stderr);
el = el_init(__progname, stdin, ttyout, stderr); /* init editline */
if ((el = el_init(__progname, stdin, stdout, stderr)) == NULL)