Andrew's git / gitweb.git / parse-options.c
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parse-options.con commit ref-filter: move get_head_description() from branch.c (d4919bb)
   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
   8#define OPT_SHORT 1
   9#define OPT_UNSET 2
  10
  11int optbug(const struct option *opt, const char *reason)
  12{
  13        if (opt->long_name) {
  14                if (opt->short_name)
  15                        return error("BUG: switch '%c' (--%s) %s",
  16                                     opt->short_name, opt->long_name, reason);
  17                return error("BUG: option '%s' %s", opt->long_name, reason);
  18        }
  19        return error("BUG: switch '%c' %s", opt->short_name, reason);
  20}
  21
  22static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
  23                   int flags, const char **arg)
  24{
  25        if (p->opt) {
  26                *arg = p->opt;
  27                p->opt = NULL;
  28        } else if (p->argc == 1 && (opt->flags & PARSE_OPT_LASTARG_DEFAULT)) {
  29                *arg = (const char *)opt->defval;
  30        } else if (p->argc > 1) {
  31                p->argc--;
  32                *arg = *++p->argv;
  33        } else
  34                return opterror(opt, "requires a value", flags);
  35        return 0;
  36}
  37
  38static void fix_filename(const char *prefix, const char **file)
  39{
  40        if (!file || !*file || !prefix || is_absolute_path(*file)
  41            || !strcmp("-", *file))
  42                return;
  43        *file = xstrdup(prefix_filename(prefix, strlen(prefix), *file));
  44}
  45
  46static int opt_command_mode_error(const struct option *opt,
  47                                  const struct option *all_opts,
  48                                  int flags)
  49{
  50        const struct option *that;
  51        struct strbuf message = STRBUF_INIT;
  52        struct strbuf that_name = STRBUF_INIT;
  53
  54        /*
  55         * Find the other option that was used to set the variable
  56         * already, and report that this is not compatible with it.
  57         */
  58        for (that = all_opts; that->type != OPTION_END; that++) {
  59                if (that == opt ||
  60                    that->type != OPTION_CMDMODE ||
  61                    that->value != opt->value ||
  62                    that->defval != *(int *)opt->value)
  63                        continue;
  64
  65                if (that->long_name)
  66                        strbuf_addf(&that_name, "--%s", that->long_name);
  67                else
  68                        strbuf_addf(&that_name, "-%c", that->short_name);
  69                strbuf_addf(&message, ": incompatible with %s", that_name.buf);
  70                strbuf_release(&that_name);
  71                opterror(opt, message.buf, flags);
  72                strbuf_release(&message);
  73                return -1;
  74        }
  75        return opterror(opt, ": incompatible with something else", flags);
  76}
  77
  78static int get_value(struct parse_opt_ctx_t *p,
  79                     const struct option *opt,
  80                     const struct option *all_opts,
  81                     int flags)
  82{
  83        const char *s, *arg;
  84        const int unset = flags & OPT_UNSET;
  85        int err;
  86
  87        if (unset && p->opt)
  88                return opterror(opt, "takes no value", flags);
  89        if (unset && (opt->flags & PARSE_OPT_NONEG))
  90                return opterror(opt, "isn't available", flags);
  91        if (!(flags & OPT_SHORT) && p->opt && (opt->flags & PARSE_OPT_NOARG))
  92                return opterror(opt, "takes no value", flags);
  93
  94        switch (opt->type) {
  95        case OPTION_LOWLEVEL_CALLBACK:
  96                return (*(parse_opt_ll_cb *)opt->callback)(p, opt, unset);
  97
  98        case OPTION_BIT:
  99                if (unset)
 100                        *(int *)opt->value &= ~opt->defval;
 101                else
 102                        *(int *)opt->value |= opt->defval;
 103                return 0;
 104
 105        case OPTION_NEGBIT:
 106                if (unset)
 107                        *(int *)opt->value |= opt->defval;
 108                else
 109                        *(int *)opt->value &= ~opt->defval;
 110                return 0;
 111
 112        case OPTION_COUNTUP:
 113                if (*(int *)opt->value < 0)
 114                        *(int *)opt->value = 0;
 115                *(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
 116                return 0;
 117
 118        case OPTION_SET_INT:
 119                *(int *)opt->value = unset ? 0 : opt->defval;
 120                return 0;
 121
 122        case OPTION_CMDMODE:
 123                /*
 124                 * Giving the same mode option twice, although is unnecessary,
 125                 * is not a grave error, so let it pass.
 126                 */
 127                if (*(int *)opt->value && *(int *)opt->value != opt->defval)
 128                        return opt_command_mode_error(opt, all_opts, flags);
 129                *(int *)opt->value = opt->defval;
 130                return 0;
 131
 132        case OPTION_STRING:
 133                if (unset)
 134                        *(const char **)opt->value = NULL;
 135                else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 136                        *(const char **)opt->value = (const char *)opt->defval;
 137                else
 138                        return get_arg(p, opt, flags, (const char **)opt->value);
 139                return 0;
 140
 141        case OPTION_FILENAME:
 142                err = 0;
 143                if (unset)
 144                        *(const char **)opt->value = NULL;
 145                else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 146                        *(const char **)opt->value = (const char *)opt->defval;
 147                else
 148                        err = get_arg(p, opt, flags, (const char **)opt->value);
 149
 150                if (!err)
 151                        fix_filename(p->prefix, (const char **)opt->value);
 152                return err;
 153
 154        case OPTION_CALLBACK:
 155                if (unset)
 156                        return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;
 157                if (opt->flags & PARSE_OPT_NOARG)
 158                        return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
 159                if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 160                        return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
 161                if (get_arg(p, opt, flags, &arg))
 162                        return -1;
 163                return (*opt->callback)(opt, arg, 0) ? (-1) : 0;
 164
 165        case OPTION_INTEGER:
 166                if (unset) {
 167                        *(int *)opt->value = 0;
 168                        return 0;
 169                }
 170                if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
 171                        *(int *)opt->value = opt->defval;
 172                        return 0;
 173                }
 174                if (get_arg(p, opt, flags, &arg))
 175                        return -1;
 176                *(int *)opt->value = strtol(arg, (char **)&s, 10);
 177                if (*s)
 178                        return opterror(opt, "expects a numerical value", flags);
 179                return 0;
 180
 181        case OPTION_MAGNITUDE:
 182                if (unset) {
 183                        *(unsigned long *)opt->value = 0;
 184                        return 0;
 185                }
 186                if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
 187                        *(unsigned long *)opt->value = opt->defval;
 188                        return 0;
 189                }
 190                if (get_arg(p, opt, flags, &arg))
 191                        return -1;
 192                if (!git_parse_ulong(arg, opt->value))
 193                        return opterror(opt,
 194                                "expects a non-negative integer value with an optional k/m/g suffix",
 195                                flags);
 196                return 0;
 197
 198        default:
 199                die("should not happen, someone must be hit on the forehead");
 200        }
 201}
 202
 203static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *options)
 204{
 205        const struct option *all_opts = options;
 206        const struct option *numopt = NULL;
 207
 208        for (; options->type != OPTION_END; options++) {
 209                if (options->short_name == *p->opt) {
 210                        p->opt = p->opt[1] ? p->opt + 1 : NULL;
 211                        return get_value(p, options, all_opts, OPT_SHORT);
 212                }
 213
 214                /*
 215                 * Handle the numerical option later, explicit one-digit
 216                 * options take precedence over it.
 217                 */
 218                if (options->type == OPTION_NUMBER)
 219                        numopt = options;
 220        }
 221        if (numopt && isdigit(*p->opt)) {
 222                size_t len = 1;
 223                char *arg;
 224                int rc;
 225
 226                while (isdigit(p->opt[len]))
 227                        len++;
 228                arg = xmemdupz(p->opt, len);
 229                p->opt = p->opt[len] ? p->opt + len : NULL;
 230                rc = (*numopt->callback)(numopt, arg, 0) ? (-1) : 0;
 231                free(arg);
 232                return rc;
 233        }
 234        return -2;
 235}
 236
 237static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
 238                          const struct option *options)
 239{
 240        const struct option *all_opts = options;
 241        const char *arg_end = strchrnul(arg, '=');
 242        const struct option *abbrev_option = NULL, *ambiguous_option = NULL;
 243        int abbrev_flags = 0, ambiguous_flags = 0;
 244
 245        for (; options->type != OPTION_END; options++) {
 246                const char *rest, *long_name = options->long_name;
 247                int flags = 0, opt_flags = 0;
 248
 249                if (!long_name)
 250                        continue;
 251
 252again:
 253                if (!skip_prefix(arg, long_name, &rest))
 254                        rest = NULL;
 255                if (options->type == OPTION_ARGUMENT) {
 256                        if (!rest)
 257                                continue;
 258                        if (*rest == '=')
 259                                return opterror(options, "takes no value", flags);
 260                        if (*rest)
 261                                continue;
 262                        p->out[p->cpidx++] = arg - 2;
 263                        return 0;
 264                }
 265                if (!rest) {
 266                        /* abbreviated? */
 267                        if (!strncmp(long_name, arg, arg_end - arg)) {
 268is_abbreviated:
 269                                if (abbrev_option) {
 270                                        /*
 271                                         * If this is abbreviated, it is
 272                                         * ambiguous. So when there is no
 273                                         * exact match later, we need to
 274                                         * error out.
 275                                         */
 276                                        ambiguous_option = abbrev_option;
 277                                        ambiguous_flags = abbrev_flags;
 278                                }
 279                                if (!(flags & OPT_UNSET) && *arg_end)
 280                                        p->opt = arg_end + 1;
 281                                abbrev_option = options;
 282                                abbrev_flags = flags ^ opt_flags;
 283                                continue;
 284                        }
 285                        /* negation allowed? */
 286                        if (options->flags & PARSE_OPT_NONEG)
 287                                continue;
 288                        /* negated and abbreviated very much? */
 289                        if (starts_with("no-", arg)) {
 290                                flags |= OPT_UNSET;
 291                                goto is_abbreviated;
 292                        }
 293                        /* negated? */
 294                        if (!starts_with(arg, "no-")) {
 295                                if (starts_with(long_name, "no-")) {
 296                                        long_name += 3;
 297                                        opt_flags |= OPT_UNSET;
 298                                        goto again;
 299                                }
 300                                continue;
 301                        }
 302                        flags |= OPT_UNSET;
 303                        if (!skip_prefix(arg + 3, long_name, &rest)) {
 304                                /* abbreviated and negated? */
 305                                if (starts_with(long_name, arg + 3))
 306                                        goto is_abbreviated;
 307                                else
 308                                        continue;
 309                        }
 310                }
 311                if (*rest) {
 312                        if (*rest != '=')
 313                                continue;
 314                        p->opt = rest + 1;
 315                }
 316                return get_value(p, options, all_opts, flags ^ opt_flags);
 317        }
 318
 319        if (ambiguous_option)
 320                return error("Ambiguous option: %s "
 321                        "(could be --%s%s or --%s%s)",
 322                        arg,
 323                        (ambiguous_flags & OPT_UNSET) ?  "no-" : "",
 324                        ambiguous_option->long_name,
 325                        (abbrev_flags & OPT_UNSET) ?  "no-" : "",
 326                        abbrev_option->long_name);
 327        if (abbrev_option)
 328                return get_value(p, abbrev_option, all_opts, abbrev_flags);
 329        return -2;
 330}
 331
 332static int parse_nodash_opt(struct parse_opt_ctx_t *p, const char *arg,
 333                            const struct option *options)
 334{
 335        const struct option *all_opts = options;
 336
 337        for (; options->type != OPTION_END; options++) {
 338                if (!(options->flags & PARSE_OPT_NODASH))
 339                        continue;
 340                if (options->short_name == arg[0] && arg[1] == '\0')
 341                        return get_value(p, options, all_opts, OPT_SHORT);
 342        }
 343        return -2;
 344}
 345
 346static void check_typos(const char *arg, const struct option *options)
 347{
 348        if (strlen(arg) < 3)
 349                return;
 350
 351        if (starts_with(arg, "no-")) {
 352                error ("did you mean `--%s` (with two dashes ?)", arg);
 353                exit(129);
 354        }
 355
 356        for (; options->type != OPTION_END; options++) {
 357                if (!options->long_name)
 358                        continue;
 359                if (starts_with(options->long_name, arg)) {
 360                        error ("did you mean `--%s` (with two dashes ?)", arg);
 361                        exit(129);
 362                }
 363        }
 364}
 365
 366static void parse_options_check(const struct option *opts)
 367{
 368        int err = 0;
 369        char short_opts[128];
 370
 371        memset(short_opts, '\0', sizeof(short_opts));
 372        for (; opts->type != OPTION_END; opts++) {
 373                if ((opts->flags & PARSE_OPT_LASTARG_DEFAULT) &&
 374                    (opts->flags & PARSE_OPT_OPTARG))
 375                        err |= optbug(opts, "uses incompatible flags "
 376                                        "LASTARG_DEFAULT and OPTARG");
 377                if (opts->short_name) {
 378                        if (0x7F <= opts->short_name)
 379                                err |= optbug(opts, "invalid short name");
 380                        else if (short_opts[opts->short_name]++)
 381                                err |= optbug(opts, "short name already used");
 382                }
 383                if (opts->flags & PARSE_OPT_NODASH &&
 384                    ((opts->flags & PARSE_OPT_OPTARG) ||
 385                     !(opts->flags & PARSE_OPT_NOARG) ||
 386                     !(opts->flags & PARSE_OPT_NONEG) ||
 387                     opts->long_name))
 388                        err |= optbug(opts, "uses feature "
 389                                        "not supported for dashless options");
 390                switch (opts->type) {
 391                case OPTION_COUNTUP:
 392                case OPTION_BIT:
 393                case OPTION_NEGBIT:
 394                case OPTION_SET_INT:
 395                case OPTION_NUMBER:
 396                        if ((opts->flags & PARSE_OPT_OPTARG) ||
 397                            !(opts->flags & PARSE_OPT_NOARG))
 398                                err |= optbug(opts, "should not accept an argument");
 399                default:
 400                        ; /* ok. (usually accepts an argument) */
 401                }
 402                if (opts->argh &&
 403                    strcspn(opts->argh, " _") != strlen(opts->argh))
 404                        err |= optbug(opts, "multi-word argh should use dash to separate words");
 405        }
 406        if (err)
 407                exit(128);
 408}
 409
 410void parse_options_start(struct parse_opt_ctx_t *ctx,
 411                         int argc, const char **argv, const char *prefix,
 412                         const struct option *options, int flags)
 413{
 414        memset(ctx, 0, sizeof(*ctx));
 415        ctx->argc = ctx->total = argc - 1;
 416        ctx->argv = argv + 1;
 417        ctx->out  = argv;
 418        ctx->prefix = prefix;
 419        ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
 420        ctx->flags = flags;
 421        if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
 422            (flags & PARSE_OPT_STOP_AT_NON_OPTION))
 423                die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
 424        parse_options_check(options);
 425}
 426
 427static int usage_with_options_internal(struct parse_opt_ctx_t *,
 428                                       const char * const *,
 429                                       const struct option *, int, int);
 430
 431int parse_options_step(struct parse_opt_ctx_t *ctx,
 432                       const struct option *options,
 433                       const char * const usagestr[])
 434{
 435        int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
 436        int err = 0;
 437
 438        /* we must reset ->opt, unknown short option leave it dangling */
 439        ctx->opt = NULL;
 440
 441        for (; ctx->argc; ctx->argc--, ctx->argv++) {
 442                const char *arg = ctx->argv[0];
 443
 444                if (*arg != '-' || !arg[1]) {
 445                        if (parse_nodash_opt(ctx, arg, options) == 0)
 446                                continue;
 447                        if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
 448                                return PARSE_OPT_NON_OPTION;
 449                        ctx->out[ctx->cpidx++] = ctx->argv[0];
 450                        continue;
 451                }
 452
 453                /* lone -h asks for help */
 454                if (internal_help && ctx->total == 1 && !strcmp(arg + 1, "h"))
 455                        goto show_usage;
 456
 457                if (arg[1] != '-') {
 458                        ctx->opt = arg + 1;
 459                        switch (parse_short_opt(ctx, options)) {
 460                        case -1:
 461                                goto show_usage_error;
 462                        case -2:
 463                                if (ctx->opt)
 464                                        check_typos(arg + 1, options);
 465                                if (internal_help && *ctx->opt == 'h')
 466                                        goto show_usage;
 467                                goto unknown;
 468                        }
 469                        if (ctx->opt)
 470                                check_typos(arg + 1, options);
 471                        while (ctx->opt) {
 472                                switch (parse_short_opt(ctx, options)) {
 473                                case -1:
 474                                        goto show_usage_error;
 475                                case -2:
 476                                        if (internal_help && *ctx->opt == 'h')
 477                                                goto show_usage;
 478
 479                                        /* fake a short option thing to hide the fact that we may have
 480                                         * started to parse aggregated stuff
 481                                         *
 482                                         * This is leaky, too bad.
 483                                         */
 484                                        ctx->argv[0] = xstrdup(ctx->opt - 1);
 485                                        *(char *)ctx->argv[0] = '-';
 486                                        goto unknown;
 487                                }
 488                        }
 489                        continue;
 490                }
 491
 492                if (!arg[2]) { /* "--" */
 493                        if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
 494                                ctx->argc--;
 495                                ctx->argv++;
 496                        }
 497                        break;
 498                }
 499
 500                if (internal_help && !strcmp(arg + 2, "help-all"))
 501                        return usage_with_options_internal(ctx, usagestr, options, 1, 0);
 502                if (internal_help && !strcmp(arg + 2, "help"))
 503                        goto show_usage;
 504                switch (parse_long_opt(ctx, arg + 2, options)) {
 505                case -1:
 506                        goto show_usage_error;
 507                case -2:
 508                        goto unknown;
 509                }
 510                continue;
 511unknown:
 512                if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
 513                        return PARSE_OPT_UNKNOWN;
 514                ctx->out[ctx->cpidx++] = ctx->argv[0];
 515                ctx->opt = NULL;
 516        }
 517        return PARSE_OPT_DONE;
 518
 519 show_usage_error:
 520        err = 1;
 521 show_usage:
 522        return usage_with_options_internal(ctx, usagestr, options, 0, err);
 523}
 524
 525int parse_options_end(struct parse_opt_ctx_t *ctx)
 526{
 527        memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
 528        ctx->out[ctx->cpidx + ctx->argc] = NULL;
 529        return ctx->cpidx + ctx->argc;
 530}
 531
 532int parse_options(int argc, const char **argv, const char *prefix,
 533                  const struct option *options, const char * const usagestr[],
 534                  int flags)
 535{
 536        struct parse_opt_ctx_t ctx;
 537
 538        parse_options_start(&ctx, argc, argv, prefix, options, flags);
 539        switch (parse_options_step(&ctx, options, usagestr)) {
 540        case PARSE_OPT_HELP:
 541                exit(129);
 542        case PARSE_OPT_NON_OPTION:
 543        case PARSE_OPT_DONE:
 544                break;
 545        default: /* PARSE_OPT_UNKNOWN */
 546                if (ctx.argv[0][1] == '-') {
 547                        error("unknown option `%s'", ctx.argv[0] + 2);
 548                } else if (isascii(*ctx.opt)) {
 549                        error("unknown switch `%c'", *ctx.opt);
 550                } else {
 551                        error("unknown non-ascii option in string: `%s'",
 552                              ctx.argv[0]);
 553                }
 554                usage_with_options(usagestr, options);
 555        }
 556
 557        precompose_argv(argc, argv);
 558        return parse_options_end(&ctx);
 559}
 560
 561static int usage_argh(const struct option *opts, FILE *outfile)
 562{
 563        const char *s;
 564        int literal = (opts->flags & PARSE_OPT_LITERAL_ARGHELP) || !opts->argh;
 565        if (opts->flags & PARSE_OPT_OPTARG)
 566                if (opts->long_name)
 567                        s = literal ? "[=%s]" : "[=<%s>]";
 568                else
 569                        s = literal ? "[%s]" : "[<%s>]";
 570        else
 571                s = literal ? " %s" : " <%s>";
 572        return utf8_fprintf(outfile, s, opts->argh ? _(opts->argh) : _("..."));
 573}
 574
 575#define USAGE_OPTS_WIDTH 24
 576#define USAGE_GAP         2
 577
 578static int usage_with_options_internal(struct parse_opt_ctx_t *ctx,
 579                                       const char * const *usagestr,
 580                                       const struct option *opts, int full, int err)
 581{
 582        FILE *outfile = err ? stderr : stdout;
 583
 584        if (!usagestr)
 585                return PARSE_OPT_HELP;
 586
 587        if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
 588                fprintf(outfile, "cat <<\\EOF\n");
 589
 590        fprintf_ln(outfile, _("usage: %s"), _(*usagestr++));
 591        while (*usagestr && **usagestr)
 592                /* TRANSLATORS: the colon here should align with the
 593                   one in "usage: %s" translation */
 594                fprintf_ln(outfile, _("   or: %s"), _(*usagestr++));
 595        while (*usagestr) {
 596                if (**usagestr)
 597                        fprintf_ln(outfile, _("    %s"), _(*usagestr));
 598                else
 599                        putchar('\n');
 600                usagestr++;
 601        }
 602
 603        if (opts->type != OPTION_GROUP)
 604                fputc('\n', outfile);
 605
 606        for (; opts->type != OPTION_END; opts++) {
 607                size_t pos;
 608                int pad;
 609
 610                if (opts->type == OPTION_GROUP) {
 611                        fputc('\n', outfile);
 612                        if (*opts->help)
 613                                fprintf(outfile, "%s\n", _(opts->help));
 614                        continue;
 615                }
 616                if (!full && (opts->flags & PARSE_OPT_HIDDEN))
 617                        continue;
 618
 619                pos = fprintf(outfile, "    ");
 620                if (opts->short_name) {
 621                        if (opts->flags & PARSE_OPT_NODASH)
 622                                pos += fprintf(outfile, "%c", opts->short_name);
 623                        else
 624                                pos += fprintf(outfile, "-%c", opts->short_name);
 625                }
 626                if (opts->long_name && opts->short_name)
 627                        pos += fprintf(outfile, ", ");
 628                if (opts->long_name)
 629                        pos += fprintf(outfile, "--%s", opts->long_name);
 630                if (opts->type == OPTION_NUMBER)
 631                        pos += utf8_fprintf(outfile, _("-NUM"));
 632
 633                if ((opts->flags & PARSE_OPT_LITERAL_ARGHELP) ||
 634                    !(opts->flags & PARSE_OPT_NOARG))
 635                        pos += usage_argh(opts, outfile);
 636
 637                if (pos <= USAGE_OPTS_WIDTH)
 638                        pad = USAGE_OPTS_WIDTH - pos;
 639                else {
 640                        fputc('\n', outfile);
 641                        pad = USAGE_OPTS_WIDTH;
 642                }
 643                fprintf(outfile, "%*s%s\n", pad + USAGE_GAP, "", _(opts->help));
 644        }
 645        fputc('\n', outfile);
 646
 647        if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
 648                fputs("EOF\n", outfile);
 649
 650        return PARSE_OPT_HELP;
 651}
 652
 653void NORETURN usage_with_options(const char * const *usagestr,
 654                        const struct option *opts)
 655{
 656        usage_with_options_internal(NULL, usagestr, opts, 0, 1);
 657        exit(129);
 658}
 659
 660void NORETURN usage_msg_opt(const char *msg,
 661                   const char * const *usagestr,
 662                   const struct option *options)
 663{
 664        fprintf(stderr, "fatal: %s\n\n", msg);
 665        usage_with_options(usagestr, options);
 666}
 667
 668#undef opterror
 669int opterror(const struct option *opt, const char *reason, int flags)
 670{
 671        if (flags & OPT_SHORT)
 672                return error("switch `%c' %s", opt->short_name, reason);
 673        if (flags & OPT_UNSET)
 674                return error("option `no-%s' %s", opt->long_name, reason);
 675        return error("option `%s' %s", opt->long_name, reason);
 676}