Andrew's git / gitweb.git / parse-options.c
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parse-options.con commit git-p4: add Git LFS backend for large file system (b47d807)
   1#include "git-compat-util.h"
   2#include "parse-options.h"
   3#include "cache.h"
   4#include "commit.h"
   5#include "color.h"
   6#include "utf8.h"
   7
   8static int parse_options_usage(struct parse_opt_ctx_t *ctx,
   9                               const char * const *usagestr,
  10                               const struct option *opts, int err);
  11
  12#define OPT_SHORT 1
  13#define OPT_UNSET 2
  14
  15int optbug(const struct option *opt, const char *reason)
  16{
  17        if (opt->long_name) {
  18                if (opt->short_name)
  19                        return error("BUG: switch '%c' (--%s) %s",
  20                                     opt->short_name, opt->long_name, reason);
  21                return error("BUG: option '%s' %s", opt->long_name, reason);
  22        }
  23        return error("BUG: switch '%c' %s", opt->short_name, reason);
  24}
  25
  26static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
  27                   int flags, const char **arg)
  28{
  29        if (p->opt) {
  30                *arg = p->opt;
  31                p->opt = NULL;
  32        } else if (p->argc == 1 && (opt->flags & PARSE_OPT_LASTARG_DEFAULT)) {
  33                *arg = (const char *)opt->defval;
  34        } else if (p->argc > 1) {
  35                p->argc--;
  36                *arg = *++p->argv;
  37        } else
  38                return opterror(opt, "requires a value", flags);
  39        return 0;
  40}
  41
  42static void fix_filename(const char *prefix, const char **file)
  43{
  44        if (!file || !*file || !prefix || is_absolute_path(*file)
  45            || !strcmp("-", *file))
  46                return;
  47        *file = xstrdup(prefix_filename(prefix, strlen(prefix), *file));
  48}
  49
  50static int opt_command_mode_error(const struct option *opt,
  51                                  const struct option *all_opts,
  52                                  int flags)
  53{
  54        const struct option *that;
  55        struct strbuf message = STRBUF_INIT;
  56        struct strbuf that_name = STRBUF_INIT;
  57
  58        /*
  59         * Find the other option that was used to set the variable
  60         * already, and report that this is not compatible with it.
  61         */
  62        for (that = all_opts; that->type != OPTION_END; that++) {
  63                if (that == opt ||
  64                    that->type != OPTION_CMDMODE ||
  65                    that->value != opt->value ||
  66                    that->defval != *(int *)opt->value)
  67                        continue;
  68
  69                if (that->long_name)
  70                        strbuf_addf(&that_name, "--%s", that->long_name);
  71                else
  72                        strbuf_addf(&that_name, "-%c", that->short_name);
  73                strbuf_addf(&message, ": incompatible with %s", that_name.buf);
  74                strbuf_release(&that_name);
  75                opterror(opt, message.buf, flags);
  76                strbuf_release(&message);
  77                return -1;
  78        }
  79        return opterror(opt, ": incompatible with something else", flags);
  80}
  81
  82static int get_value(struct parse_opt_ctx_t *p,
  83                     const struct option *opt,
  84                     const struct option *all_opts,
  85                     int flags)
  86{
  87        const char *s, *arg;
  88        const int unset = flags & OPT_UNSET;
  89        int err;
  90
  91        if (unset && p->opt)
  92                return opterror(opt, "takes no value", flags);
  93        if (unset && (opt->flags & PARSE_OPT_NONEG))
  94                return opterror(opt, "isn't available", flags);
  95        if (!(flags & OPT_SHORT) && p->opt && (opt->flags & PARSE_OPT_NOARG))
  96                return opterror(opt, "takes no value", flags);
  97
  98        switch (opt->type) {
  99        case OPTION_LOWLEVEL_CALLBACK:
 100                return (*(parse_opt_ll_cb *)opt->callback)(p, opt, unset);
 101
 102        case OPTION_BIT:
 103                if (unset)
 104                        *(int *)opt->value &= ~opt->defval;
 105                else
 106                        *(int *)opt->value |= opt->defval;
 107                return 0;
 108
 109        case OPTION_NEGBIT:
 110                if (unset)
 111                        *(int *)opt->value |= opt->defval;
 112                else
 113                        *(int *)opt->value &= ~opt->defval;
 114                return 0;
 115
 116        case OPTION_COUNTUP:
 117                *(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
 118                return 0;
 119
 120        case OPTION_SET_INT:
 121                *(int *)opt->value = unset ? 0 : opt->defval;
 122                return 0;
 123
 124        case OPTION_CMDMODE:
 125                /*
 126                 * Giving the same mode option twice, although is unnecessary,
 127                 * is not a grave error, so let it pass.
 128                 */
 129                if (*(int *)opt->value && *(int *)opt->value != opt->defval)
 130                        return opt_command_mode_error(opt, all_opts, flags);
 131                *(int *)opt->value = opt->defval;
 132                return 0;
 133
 134        case OPTION_STRING:
 135                if (unset)
 136                        *(const char **)opt->value = NULL;
 137                else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 138                        *(const char **)opt->value = (const char *)opt->defval;
 139                else
 140                        return get_arg(p, opt, flags, (const char **)opt->value);
 141                return 0;
 142
 143        case OPTION_FILENAME:
 144                err = 0;
 145                if (unset)
 146                        *(const char **)opt->value = NULL;
 147                else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 148                        *(const char **)opt->value = (const char *)opt->defval;
 149                else
 150                        err = get_arg(p, opt, flags, (const char **)opt->value);
 151
 152                if (!err)
 153                        fix_filename(p->prefix, (const char **)opt->value);
 154                return err;
 155
 156        case OPTION_CALLBACK:
 157                if (unset)
 158                        return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;
 159                if (opt->flags & PARSE_OPT_NOARG)
 160                        return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
 161                if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 162                        return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
 163                if (get_arg(p, opt, flags, &arg))
 164                        return -1;
 165                return (*opt->callback)(opt, arg, 0) ? (-1) : 0;
 166
 167        case OPTION_INTEGER:
 168                if (unset) {
 169                        *(int *)opt->value = 0;
 170                        return 0;
 171                }
 172                if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
 173                        *(int *)opt->value = opt->defval;
 174                        return 0;
 175                }
 176                if (get_arg(p, opt, flags, &arg))
 177                        return -1;
 178                *(int *)opt->value = strtol(arg, (char **)&s, 10);
 179                if (*s)
 180                        return opterror(opt, "expects a numerical value", flags);
 181                return 0;
 182
 183        case OPTION_MAGNITUDE:
 184                if (unset) {
 185                        *(unsigned long *)opt->value = 0;
 186                        return 0;
 187                }
 188                if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
 189                        *(unsigned long *)opt->value = opt->defval;
 190                        return 0;
 191                }
 192                if (get_arg(p, opt, flags, &arg))
 193                        return -1;
 194                if (!git_parse_ulong(arg, opt->value))
 195                        return opterror(opt,
 196                                "expects a non-negative integer value with an optional k/m/g suffix",
 197                                flags);
 198                return 0;
 199
 200        default:
 201                die("should not happen, someone must be hit on the forehead");
 202        }
 203}
 204
 205static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *options)
 206{
 207        const struct option *all_opts = options;
 208        const struct option *numopt = NULL;
 209
 210        for (; options->type != OPTION_END; options++) {
 211                if (options->short_name == *p->opt) {
 212                        p->opt = p->opt[1] ? p->opt + 1 : NULL;
 213                        return get_value(p, options, all_opts, OPT_SHORT);
 214                }
 215
 216                /*
 217                 * Handle the numerical option later, explicit one-digit
 218                 * options take precedence over it.
 219                 */
 220                if (options->type == OPTION_NUMBER)
 221                        numopt = options;
 222        }
 223        if (numopt && isdigit(*p->opt)) {
 224                size_t len = 1;
 225                char *arg;
 226                int rc;
 227
 228                while (isdigit(p->opt[len]))
 229                        len++;
 230                arg = xmemdupz(p->opt, len);
 231                p->opt = p->opt[len] ? p->opt + len : NULL;
 232                rc = (*numopt->callback)(numopt, arg, 0) ? (-1) : 0;
 233                free(arg);
 234                return rc;
 235        }
 236        return -2;
 237}
 238
 239static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
 240                          const struct option *options)
 241{
 242        const struct option *all_opts = options;
 243        const char *arg_end = strchrnul(arg, '=');
 244        const struct option *abbrev_option = NULL, *ambiguous_option = NULL;
 245        int abbrev_flags = 0, ambiguous_flags = 0;
 246
 247        for (; options->type != OPTION_END; options++) {
 248                const char *rest, *long_name = options->long_name;
 249                int flags = 0, opt_flags = 0;
 250
 251                if (!long_name)
 252                        continue;
 253
 254again:
 255                if (!skip_prefix(arg, long_name, &rest))
 256                        rest = NULL;
 257                if (options->type == OPTION_ARGUMENT) {
 258                        if (!rest)
 259                                continue;
 260                        if (*rest == '=')
 261                                return opterror(options, "takes no value", flags);
 262                        if (*rest)
 263                                continue;
 264                        p->out[p->cpidx++] = arg - 2;
 265                        return 0;
 266                }
 267                if (!rest) {
 268                        /* abbreviated? */
 269                        if (!strncmp(long_name, arg, arg_end - arg)) {
 270is_abbreviated:
 271                                if (abbrev_option) {
 272                                        /*
 273                                         * If this is abbreviated, it is
 274                                         * ambiguous. So when there is no
 275                                         * exact match later, we need to
 276                                         * error out.
 277                                         */
 278                                        ambiguous_option = abbrev_option;
 279                                        ambiguous_flags = abbrev_flags;
 280                                }
 281                                if (!(flags & OPT_UNSET) && *arg_end)
 282                                        p->opt = arg_end + 1;
 283                                abbrev_option = options;
 284                                abbrev_flags = flags ^ opt_flags;
 285                                continue;
 286                        }
 287                        /* negation allowed? */
 288                        if (options->flags & PARSE_OPT_NONEG)
 289                                continue;
 290                        /* negated and abbreviated very much? */
 291                        if (starts_with("no-", arg)) {
 292                                flags |= OPT_UNSET;
 293                                goto is_abbreviated;
 294                        }
 295                        /* negated? */
 296                        if (!starts_with(arg, "no-")) {
 297                                if (starts_with(long_name, "no-")) {
 298                                        long_name += 3;
 299                                        opt_flags |= OPT_UNSET;
 300                                        goto again;
 301                                }
 302                                continue;
 303                        }
 304                        flags |= OPT_UNSET;
 305                        if (!skip_prefix(arg + 3, long_name, &rest)) {
 306                                /* abbreviated and negated? */
 307                                if (starts_with(long_name, arg + 3))
 308                                        goto is_abbreviated;
 309                                else
 310                                        continue;
 311                        }
 312                }
 313                if (*rest) {
 314                        if (*rest != '=')
 315                                continue;
 316                        p->opt = rest + 1;
 317                }
 318                return get_value(p, options, all_opts, flags ^ opt_flags);
 319        }
 320
 321        if (ambiguous_option)
 322                return error("Ambiguous option: %s "
 323                        "(could be --%s%s or --%s%s)",
 324                        arg,
 325                        (ambiguous_flags & OPT_UNSET) ?  "no-" : "",
 326                        ambiguous_option->long_name,
 327                        (abbrev_flags & OPT_UNSET) ?  "no-" : "",
 328                        abbrev_option->long_name);
 329        if (abbrev_option)
 330                return get_value(p, abbrev_option, all_opts, abbrev_flags);
 331        return -2;
 332}
 333
 334static int parse_nodash_opt(struct parse_opt_ctx_t *p, const char *arg,
 335                            const struct option *options)
 336{
 337        const struct option *all_opts = options;
 338
 339        for (; options->type != OPTION_END; options++) {
 340                if (!(options->flags & PARSE_OPT_NODASH))
 341                        continue;
 342                if (options->short_name == arg[0] && arg[1] == '\0')
 343                        return get_value(p, options, all_opts, OPT_SHORT);
 344        }
 345        return -2;
 346}
 347
 348static void check_typos(const char *arg, const struct option *options)
 349{
 350        if (strlen(arg) < 3)
 351                return;
 352
 353        if (starts_with(arg, "no-")) {
 354                error ("did you mean `--%s` (with two dashes ?)", arg);
 355                exit(129);
 356        }
 357
 358        for (; options->type != OPTION_END; options++) {
 359                if (!options->long_name)
 360                        continue;
 361                if (starts_with(options->long_name, arg)) {
 362                        error ("did you mean `--%s` (with two dashes ?)", arg);
 363                        exit(129);
 364                }
 365        }
 366}
 367
 368static void parse_options_check(const struct option *opts)
 369{
 370        int err = 0;
 371        char short_opts[128];
 372
 373        memset(short_opts, '\0', sizeof(short_opts));
 374        for (; opts->type != OPTION_END; opts++) {
 375                if ((opts->flags & PARSE_OPT_LASTARG_DEFAULT) &&
 376                    (opts->flags & PARSE_OPT_OPTARG))
 377                        err |= optbug(opts, "uses incompatible flags "
 378                                        "LASTARG_DEFAULT and OPTARG");
 379                if (opts->short_name) {
 380                        if (0x7F <= opts->short_name)
 381                                err |= optbug(opts, "invalid short name");
 382                        else if (short_opts[opts->short_name]++)
 383                                err |= optbug(opts, "short name already used");
 384                }
 385                if (opts->flags & PARSE_OPT_NODASH &&
 386                    ((opts->flags & PARSE_OPT_OPTARG) ||
 387                     !(opts->flags & PARSE_OPT_NOARG) ||
 388                     !(opts->flags & PARSE_OPT_NONEG) ||
 389                     opts->long_name))
 390                        err |= optbug(opts, "uses feature "
 391                                        "not supported for dashless options");
 392                switch (opts->type) {
 393                case OPTION_COUNTUP:
 394                case OPTION_BIT:
 395                case OPTION_NEGBIT:
 396                case OPTION_SET_INT:
 397                case OPTION_NUMBER:
 398                        if ((opts->flags & PARSE_OPT_OPTARG) ||
 399                            !(opts->flags & PARSE_OPT_NOARG))
 400                                err |= optbug(opts, "should not accept an argument");
 401                default:
 402                        ; /* ok. (usually accepts an argument) */
 403                }
 404                if (opts->argh &&
 405                    strcspn(opts->argh, " _") != strlen(opts->argh))
 406                        err |= optbug(opts, "multi-word argh should use dash to separate words");
 407        }
 408        if (err)
 409                exit(128);
 410}
 411
 412void parse_options_start(struct parse_opt_ctx_t *ctx,
 413                         int argc, const char **argv, const char *prefix,
 414                         const struct option *options, int flags)
 415{
 416        memset(ctx, 0, sizeof(*ctx));
 417        ctx->argc = argc - 1;
 418        ctx->argv = argv + 1;
 419        ctx->out  = argv;
 420        ctx->prefix = prefix;
 421        ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
 422        ctx->flags = flags;
 423        if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
 424            (flags & PARSE_OPT_STOP_AT_NON_OPTION))
 425                die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
 426        parse_options_check(options);
 427}
 428
 429static int usage_with_options_internal(struct parse_opt_ctx_t *,
 430                                       const char * const *,
 431                                       const struct option *, int, int);
 432
 433int parse_options_step(struct parse_opt_ctx_t *ctx,
 434                       const struct option *options,
 435                       const char * const usagestr[])
 436{
 437        int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
 438
 439        /* we must reset ->opt, unknown short option leave it dangling */
 440        ctx->opt = NULL;
 441
 442        for (; ctx->argc; ctx->argc--, ctx->argv++) {
 443                const char *arg = ctx->argv[0];
 444
 445                if (*arg != '-' || !arg[1]) {
 446                        if (parse_nodash_opt(ctx, arg, options) == 0)
 447                                continue;
 448                        if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
 449                                return PARSE_OPT_NON_OPTION;
 450                        ctx->out[ctx->cpidx++] = ctx->argv[0];
 451                        continue;
 452                }
 453
 454                if (arg[1] != '-') {
 455                        ctx->opt = arg + 1;
 456                        if (internal_help && *ctx->opt == 'h')
 457                                return parse_options_usage(ctx, usagestr, options, 0);
 458                        switch (parse_short_opt(ctx, options)) {
 459                        case -1:
 460                                return parse_options_usage(ctx, usagestr, options, 1);
 461                        case -2:
 462                                if (ctx->opt)
 463                                        check_typos(arg + 1, options);
 464                                goto unknown;
 465                        }
 466                        if (ctx->opt)
 467                                check_typos(arg + 1, options);
 468                        while (ctx->opt) {
 469                                if (internal_help && *ctx->opt == 'h')
 470                                        return parse_options_usage(ctx, usagestr, options, 0);
 471                                switch (parse_short_opt(ctx, options)) {
 472                                case -1:
 473                                        return parse_options_usage(ctx, usagestr, options, 1);
 474                                case -2:
 475                                        /* fake a short option thing to hide the fact that we may have
 476                                         * started to parse aggregated stuff
 477                                         *
 478                                         * This is leaky, too bad.
 479                                         */
 480                                        ctx->argv[0] = xstrdup(ctx->opt - 1);
 481                                        *(char *)ctx->argv[0] = '-';
 482                                        goto unknown;
 483                                }
 484                        }
 485                        continue;
 486                }
 487
 488                if (!arg[2]) { /* "--" */
 489                        if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
 490                                ctx->argc--;
 491                                ctx->argv++;
 492                        }
 493                        break;
 494                }
 495
 496                if (internal_help && !strcmp(arg + 2, "help-all"))
 497                        return usage_with_options_internal(ctx, usagestr, options, 1, 0);
 498                if (internal_help && !strcmp(arg + 2, "help"))
 499                        return parse_options_usage(ctx, usagestr, options, 0);
 500                switch (parse_long_opt(ctx, arg + 2, options)) {
 501                case -1:
 502                        return parse_options_usage(ctx, usagestr, options, 1);
 503                case -2:
 504                        goto unknown;
 505                }
 506                continue;
 507unknown:
 508                if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
 509                        return PARSE_OPT_UNKNOWN;
 510                ctx->out[ctx->cpidx++] = ctx->argv[0];
 511                ctx->opt = NULL;
 512        }
 513        return PARSE_OPT_DONE;
 514}
 515
 516int parse_options_end(struct parse_opt_ctx_t *ctx)
 517{
 518        memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
 519        ctx->out[ctx->cpidx + ctx->argc] = NULL;
 520        return ctx->cpidx + ctx->argc;
 521}
 522
 523int parse_options(int argc, const char **argv, const char *prefix,
 524                  const struct option *options, const char * const usagestr[],
 525                  int flags)
 526{
 527        struct parse_opt_ctx_t ctx;
 528
 529        parse_options_start(&ctx, argc, argv, prefix, options, flags);
 530        switch (parse_options_step(&ctx, options, usagestr)) {
 531        case PARSE_OPT_HELP:
 532                exit(129);
 533        case PARSE_OPT_NON_OPTION:
 534        case PARSE_OPT_DONE:
 535                break;
 536        default: /* PARSE_OPT_UNKNOWN */
 537                if (ctx.argv[0][1] == '-') {
 538                        error("unknown option `%s'", ctx.argv[0] + 2);
 539                } else if (isascii(*ctx.opt)) {
 540                        error("unknown switch `%c'", *ctx.opt);
 541                } else {
 542                        error("unknown non-ascii option in string: `%s'",
 543                              ctx.argv[0]);
 544                }
 545                usage_with_options(usagestr, options);
 546        }
 547
 548        precompose_argv(argc, argv);
 549        return parse_options_end(&ctx);
 550}
 551
 552static int usage_argh(const struct option *opts, FILE *outfile)
 553{
 554        const char *s;
 555        int literal = (opts->flags & PARSE_OPT_LITERAL_ARGHELP) || !opts->argh;
 556        if (opts->flags & PARSE_OPT_OPTARG)
 557                if (opts->long_name)
 558                        s = literal ? "[=%s]" : "[=<%s>]";
 559                else
 560                        s = literal ? "[%s]" : "[<%s>]";
 561        else
 562                s = literal ? " %s" : " <%s>";
 563        return utf8_fprintf(outfile, s, opts->argh ? _(opts->argh) : _("..."));
 564}
 565
 566#define USAGE_OPTS_WIDTH 24
 567#define USAGE_GAP         2
 568
 569static int usage_with_options_internal(struct parse_opt_ctx_t *ctx,
 570                                       const char * const *usagestr,
 571                                       const struct option *opts, int full, int err)
 572{
 573        FILE *outfile = err ? stderr : stdout;
 574
 575        if (!usagestr)
 576                return PARSE_OPT_HELP;
 577
 578        if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
 579                fprintf(outfile, "cat <<\\EOF\n");
 580
 581        fprintf_ln(outfile, _("usage: %s"), _(*usagestr++));
 582        while (*usagestr && **usagestr)
 583                /* TRANSLATORS: the colon here should align with the
 584                   one in "usage: %s" translation */
 585                fprintf_ln(outfile, _("   or: %s"), _(*usagestr++));
 586        while (*usagestr) {
 587                if (**usagestr)
 588                        fprintf_ln(outfile, _("    %s"), _(*usagestr));
 589                else
 590                        putchar('\n');
 591                usagestr++;
 592        }
 593
 594        if (opts->type != OPTION_GROUP)
 595                fputc('\n', outfile);
 596
 597        for (; opts->type != OPTION_END; opts++) {
 598                size_t pos;
 599                int pad;
 600
 601                if (opts->type == OPTION_GROUP) {
 602                        fputc('\n', outfile);
 603                        if (*opts->help)
 604                                fprintf(outfile, "%s\n", _(opts->help));
 605                        continue;
 606                }
 607                if (!full && (opts->flags & PARSE_OPT_HIDDEN))
 608                        continue;
 609
 610                pos = fprintf(outfile, "    ");
 611                if (opts->short_name) {
 612                        if (opts->flags & PARSE_OPT_NODASH)
 613                                pos += fprintf(outfile, "%c", opts->short_name);
 614                        else
 615                                pos += fprintf(outfile, "-%c", opts->short_name);
 616                }
 617                if (opts->long_name && opts->short_name)
 618                        pos += fprintf(outfile, ", ");
 619                if (opts->long_name)
 620                        pos += fprintf(outfile, "--%s", opts->long_name);
 621                if (opts->type == OPTION_NUMBER)
 622                        pos += utf8_fprintf(outfile, _("-NUM"));
 623
 624                if ((opts->flags & PARSE_OPT_LITERAL_ARGHELP) ||
 625                    !(opts->flags & PARSE_OPT_NOARG))
 626                        pos += usage_argh(opts, outfile);
 627
 628                if (pos <= USAGE_OPTS_WIDTH)
 629                        pad = USAGE_OPTS_WIDTH - pos;
 630                else {
 631                        fputc('\n', outfile);
 632                        pad = USAGE_OPTS_WIDTH;
 633                }
 634                fprintf(outfile, "%*s%s\n", pad + USAGE_GAP, "", _(opts->help));
 635        }
 636        fputc('\n', outfile);
 637
 638        if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
 639                fputs("EOF\n", outfile);
 640
 641        return PARSE_OPT_HELP;
 642}
 643
 644void NORETURN usage_with_options(const char * const *usagestr,
 645                        const struct option *opts)
 646{
 647        usage_with_options_internal(NULL, usagestr, opts, 0, 1);
 648        exit(129);
 649}
 650
 651void NORETURN usage_msg_opt(const char *msg,
 652                   const char * const *usagestr,
 653                   const struct option *options)
 654{
 655        fprintf(stderr, "%s\n\n", msg);
 656        usage_with_options(usagestr, options);
 657}
 658
 659static int parse_options_usage(struct parse_opt_ctx_t *ctx,
 660                               const char * const *usagestr,
 661                               const struct option *opts, int err)
 662{
 663        return usage_with_options_internal(ctx, usagestr, opts, 0, err);
 664}
 665
 666#undef opterror
 667int opterror(const struct option *opt, const char *reason, int flags)
 668{
 669        if (flags & OPT_SHORT)
 670                return error("switch `%c' %s", opt->short_name, reason);
 671        if (flags & OPT_UNSET)
 672                return error("option `no-%s' %s", opt->long_name, reason);
 673        return error("option `%s' %s", opt->long_name, reason);
 674}