source: MondoRescue/branches/3.3/mindi-busybox/networking/libiproute/ip_parse_common_args.c@ 3621

/* vi: set sw=4 ts=4: */
/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 *
 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
 *
 * Changes:
 *
 * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
 */

#include "ip_common.h"  /* #include "libbb.h" is inside */
#include "utils.h"

family_t preferred_family = AF_UNSPEC;
smallint oneline;
char _SL_;

char** FAST_FUNC ip_parse_common_args(char **argv)
{
    static const char ip_common_commands[] ALIGN1 =
        "oneline" "\0"
        "family" "\0"
        "4" "\0"
        "6" "\0"
        "0" "\0"
        ;
    enum {
        ARG_oneline,
        ARG_family,
        ARG_IPv4,
        ARG_IPv6,
        ARG_packet,
    };
    static const family_t af_numbers[] = { AF_INET, AF_INET6, AF_PACKET };
    int arg;

    while (*argv) {
        char *opt = *argv;

        if (opt[0] != '-')
            break;
        opt++;
        if (opt[0] == '-') {
            opt++;
            if (!opt[0]) { /* "--" */
                argv++;
                break;
            }
        }
        arg = index_in_substrings(ip_common_commands, opt);
        if (arg < 0)
            bb_show_usage();
        if (arg == ARG_oneline) {
            oneline = 1;
            argv++;
            continue;
        }
        if (arg == ARG_family) {
            static const char families[] ALIGN1 =
                "inet" "\0" "inet6" "\0" "link" "\0";
            argv++;
            if (!*argv)
                bb_show_usage();
            arg = index_in_strings(families, *argv);
            if (arg < 0)
                invarg_1_to_2(*argv, "family");
            /* now arg == 0, 1 or 2 */
        } else {
            arg -= ARG_IPv4;
            /* now arg == 0, 1 or 2 */
        }
        preferred_family = af_numbers[arg];
        argv++;
    }
    _SL_ = oneline ? '\\' : '\n';
    return argv;
}