Function early_options

src/earlyarg.c:179–361

process some command line arguments before loading options */

/* process some command line arguments before loading options */
void
early_options(int *argc_p, char ***argv_p, char **hackdir_p)
{
    char **argv, *arg, *origarg;
    int argc, oldargc, ndx = 0, consumed = 0;

#ifdef ENHANCED_SYMBOLS
    if (argcheck(*argc_p, *argv_p, ARG_DUMPGLYPHIDS) == 2)
        opt_terminate();
#endif

    config_error_init(FALSE, "command line", FALSE);

    /* treat "nethack ?" as a request for usage info; due to shell
       processing, player likely has to use "nethack \?" or "nethack '?'"
       [won't work if used as "nethack -dpath ?" or "nethack -d path ?"] */
    if (*argc_p > 1 && !strcmp((*argv_p)[1], "?"))
        opt_usage(*hackdir_p); /* doesn't return */

    /*
     * Both *argc_p and *argv_p account for the program name as (*argv_p)[0];
     * local argc and argv implicitly discard that (by starting 'ndx' at 1).
     * argcheck() doesn't mind, prscore() (via scores_only()) does (for the
     * number of args it gets passed, not for the value of argv[0]).
     */
    for (ndx = 1; ndx < *argc_p; ndx += (consumed ? 0 : 1)) {
        consumed = 0;
        argc = *argc_p - ndx;
        argv = *argv_p + ndx;

        arg = origarg = argv[0];
        /* skip any args intended for deferred options */
        if (*arg != '-')
            continue;
        /* allow second dash if arg name is longer than one character */
        if (arg[0] == '-' && arg[1] == '-' && arg[2] != '\0'
            && (arg[3] != '\0' && arg[3] != '=' && arg[3] != ':'))
            ++arg;

        switch (arg[1]) { /* char after leading dash */
        case 'b':
#ifdef CRASHREPORT
            // --bidshow
            if (argcheck(argc, argv, ARG_BIDSHOW) == 2) {
                opt_terminate();
                /*NOTREACHED*/
            }
#endif
            break;
        case 'd':
            if (argcheck(argc, argv, ARG_DEBUG) == 1) {
                consume_arg(ndx, argc_p, argv_p), consumed = 1;
#ifndef NODUMPENUMS
            } else if (argcheck(argc, argv, ARG_DUMPENUMS) == 2) {
                opt_terminate();
                /*NOTREACHED*/
#endif
            } else if (argcheck(argc, argv, ARG_DUMPMONGEN) == 2) {