Andrew's git / gitweb.git / parse-options.c
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parse-options.con commit Merge branch 'ab/grep-lose-opt-regflags' (eac97b4)
   1#include "git-compat-util.h"
   2#include "parse-options.h"
   3#include "cache.h"
   4#include "config.h"
   5#include "commit.h"
   6#include "color.h"
   7#include "utf8.h"
   8
   9#define OPT_SHORT 1
  10#define OPT_UNSET 2
  11
  12int optbug(const struct option *opt, const char *reason)
  13{
  14        if (opt->long_name) {
  15                if (opt->short_name)
  16                        return error("BUG: switch '%c' (--%s) %s",
  17                                     opt->short_name, opt->long_name, reason);
  18                return error("BUG: option '%s' %s", opt->long_name, reason);
  19        }
  20        return error("BUG: switch '%c' %s", opt->short_name, reason);
  21}
  22
  23static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
  24                   int flags, const char **arg)
  25{
  26        if (p->opt) {
  27                *arg = p->opt;
  28                p->opt = NULL;
  29        } else if (p->argc == 1 && (opt->flags & PARSE_OPT_LASTARG_DEFAULT)) {
  30                *arg = (const char *)opt->defval;
  31        } else if (p->argc > 1) {
  32                p->argc--;
  33                *arg = *++p->argv;
  34        } else
  35                return opterror(opt, "requires a value", flags);
  36        return 0;
  37}
  38
  39static void fix_filename(const char *prefix, const char **file)
  40{
  41        if (!file || !*file || !prefix || is_absolute_path(*file)
  42            || !strcmp("-", *file))
  43                return;
  44        *file = prefix_filename(prefix, *file);
  45}
  46
  47static int opt_command_mode_error(const struct option *opt,
  48                                  const struct option *all_opts,
  49                                  int flags)
  50{
  51        const struct option *that;
  52        struct strbuf message = STRBUF_INIT;
  53        struct strbuf that_name = STRBUF_INIT;
  54
  55        /*
  56         * Find the other option that was used to set the variable
  57         * already, and report that this is not compatible with it.
  58         */
  59        for (that = all_opts; that->type != OPTION_END; that++) {
  60                if (that == opt ||
  61                    that->type != OPTION_CMDMODE ||
  62                    that->value != opt->value ||
  63                    that->defval != *(int *)opt->value)
  64                        continue;
  65
  66                if (that->long_name)
  67                        strbuf_addf(&that_name, "--%s", that->long_name);
  68                else
  69                        strbuf_addf(&that_name, "-%c", that->short_name);
  70                strbuf_addf(&message, ": incompatible with %s", that_name.buf);
  71                strbuf_release(&that_name);
  72                opterror(opt, message.buf, flags);
  73                strbuf_release(&message);
  74                return -1;
  75        }
  76        return opterror(opt, ": incompatible with something else", flags);
  77}
  78
  79static int get_value(struct parse_opt_ctx_t *p,
  80                     const struct option *opt,
  81                     const struct option *all_opts,
  82                     int flags)
  83{
  84        const char *s, *arg;
  85        const int unset = flags & OPT_UNSET;
  86        int err;
  87
  88        if (unset && p->opt)
  89                return opterror(opt, "takes no value", flags);
  90        if (unset && (opt->flags & PARSE_OPT_NONEG))
  91                return opterror(opt, "isn't available", flags);
  92        if (!(flags & OPT_SHORT) && p->opt && (opt->flags & PARSE_OPT_NOARG))
  93                return opterror(opt, "takes no value", flags);
  94
  95        switch (opt->type) {
  96        case OPTION_LOWLEVEL_CALLBACK:
  97                return (*(parse_opt_ll_cb *)opt->callback)(p, opt, unset);
  98
  99        case OPTION_BIT:
 100                if (unset)
 101                        *(int *)opt->value &= ~opt->defval;
 102                else
 103                        *(int *)opt->value |= opt->defval;
 104                return 0;
 105
 106        case OPTION_NEGBIT:
 107                if (unset)
 108                        *(int *)opt->value |= opt->defval;
 109                else
 110                        *(int *)opt->value &= ~opt->defval;
 111                return 0;
 112
 113        case OPTION_COUNTUP:
 114                if (*(int *)opt->value < 0)
 115                        *(int *)opt->value = 0;
 116                *(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
 117                return 0;
 118
 119        case OPTION_SET_INT:
 120                *(int *)opt->value = unset ? 0 : opt->defval;
 121                return 0;
 122
 123        case OPTION_CMDMODE:
 124                /*
 125                 * Giving the same mode option twice, although is unnecessary,
 126                 * is not a grave error, so let it pass.
 127                 */
 128                if (*(int *)opt->value && *(int *)opt->value != opt->defval)
 129                        return opt_command_mode_error(opt, all_opts, flags);
 130                *(int *)opt->value = opt->defval;
 131                return 0;
 132
 133        case OPTION_STRING:
 134                if (unset)
 135                        *(const char **)opt->value = NULL;
 136                else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 137                        *(const char **)opt->value = (const char *)opt->defval;
 138                else
 139                        return get_arg(p, opt, flags, (const char **)opt->value);
 140                return 0;
 141
 142        case OPTION_FILENAME:
 143                err = 0;
 144                if (unset)
 145                        *(const char **)opt->value = NULL;
 146                else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 147                        *(const char **)opt->value = (const char *)opt->defval;
 148                else
 149                        err = get_arg(p, opt, flags, (const char **)opt->value);
 150
 151                if (!err)
 152                        fix_filename(p->prefix, (const char **)opt->value);
 153                return err;
 154
 155        case OPTION_CALLBACK:
 156                if (unset)
 157                        return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;
 158                if (opt->flags & PARSE_OPT_NOARG)
 159                        return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
 160                if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 161                        return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
 162                if (get_arg(p, opt, flags, &arg))
 163                        return -1;
 164                return (*opt->callback)(opt, arg, 0) ? (-1) : 0;
 165
 166        case OPTION_INTEGER:
 167                if (unset) {
 168                        *(int *)opt->value = 0;
 169                        return 0;
 170                }
 171                if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
 172                        *(int *)opt->value = opt->defval;
 173                        return 0;
 174                }
 175                if (get_arg(p, opt, flags, &arg))
 176                        return -1;
 177                *(int *)opt->value = strtol(arg, (char **)&s, 10);
 178                if (*s)
 179                        return opterror(opt, "expects a numerical value", flags);
 180                return 0;
 181
 182        case OPTION_MAGNITUDE:
 183                if (unset) {
 184                        *(unsigned long *)opt->value = 0;
 185                        return 0;
 186                }
 187                if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
 188                        *(unsigned long *)opt->value = opt->defval;
 189                        return 0;
 190                }
 191                if (get_arg(p, opt, flags, &arg))
 192                        return -1;
 193                if (!git_parse_ulong(arg, opt->value))
 194                        return opterror(opt,
 195                                "expects a non-negative integer value with an optional k/m/g suffix",
 196                                flags);
 197                return 0;
 198
 199        default:
 200                die("should not happen, someone must be hit on the forehead");
 201        }
 202}
 203
 204static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *options)
 205{
 206        const struct option *all_opts = options;
 207        const struct option *numopt = NULL;
 208
 209        for (; options->type != OPTION_END; options++) {
 210                if (options->short_name == *p->opt) {
 211                        p->opt = p->opt[1] ? p->opt + 1 : NULL;
 212                        return get_value(p, options, all_opts, OPT_SHORT);
 213                }
 214
 215                /*
 216                 * Handle the numerical option later, explicit one-digit
 217                 * options take precedence over it.
 218                 */
 219                if (options->type == OPTION_NUMBER)
 220                        numopt = options;
 221        }
 222        if (numopt && isdigit(*p->opt)) {
 223                size_t len = 1;
 224                char *arg;
 225                int rc;
 226
 227                while (isdigit(p->opt[len]))
 228                        len++;
 229                arg = xmemdupz(p->opt, len);
 230                p->opt = p->opt[len] ? p->opt + len : NULL;
 231                rc = (*numopt->callback)(numopt, arg, 0) ? (-1) : 0;
 232                free(arg);
 233                return rc;
 234        }
 235        return -2;
 236}
 237
 238static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
 239                          const struct option *options)
 240{
 241        const struct option *all_opts = options;
 242        const char *arg_end = strchrnul(arg, '=');
 243        const struct option *abbrev_option = NULL, *ambiguous_option = NULL;
 244        int abbrev_flags = 0, ambiguous_flags = 0;
 245
 246        for (; options->type != OPTION_END; options++) {
 247                const char *rest, *long_name = options->long_name;
 248                int flags = 0, opt_flags = 0;
 249
 250                if (!long_name)
 251                        continue;
 252
 253again:
 254                if (!skip_prefix(arg, long_name, &rest))
 255                        rest = NULL;
 256                if (options->type == OPTION_ARGUMENT) {
 257                        if (!rest)
 258                                continue;
 259                        if (*rest == '=')
 260                                return opterror(options, "takes no value", flags);
 261                        if (*rest)
 262                                continue;
 263                        p->out[p->cpidx++] = arg - 2;
 264                        return 0;
 265                }
 266                if (!rest) {
 267                        /* abbreviated? */
 268                        if (!strncmp(long_name, arg, arg_end - arg)) {
 269is_abbreviated:
 270                                if (abbrev_option) {
 271                                        /*
 272                                         * If this is abbreviated, it is
 273                                         * ambiguous. So when there is no
 274                                         * exact match later, we need to
 275                                         * error out.
 276                                         */
 277                                        ambiguous_option = abbrev_option;
 278                                        ambiguous_flags = abbrev_flags;
 279                                }
 280                                if (!(flags & OPT_UNSET) && *arg_end)
 281                                        p->opt = arg_end + 1;
 282                                abbrev_option = options;
 283                                abbrev_flags = flags ^ opt_flags;
 284                                continue;
 285                        }
 286                        /* negation allowed? */
 287                        if (options->flags & PARSE_OPT_NONEG)
 288                                continue;
 289                        /* negated and abbreviated very much? */
 290                        if (starts_with("no-", arg)) {
 291                                flags |= OPT_UNSET;
 292                                goto is_abbreviated;
 293                        }
 294                        /* negated? */
 295                        if (!starts_with(arg, "no-")) {
 296                                if (starts_with(long_name, "no-")) {
 297                                        long_name += 3;
 298                                        opt_flags |= OPT_UNSET;
 299                                        goto again;
 300                                }
 301                                continue;
 302                        }
 303                        flags |= OPT_UNSET;
 304                        if (!skip_prefix(arg + 3, long_name, &rest)) {
 305                                /* abbreviated and negated? */
 306                                if (starts_with(long_name, arg + 3))
 307                                        goto is_abbreviated;
 308                                else
 309                                        continue;
 310                        }
 311                }
 312                if (*rest) {
 313                        if (*rest != '=')
 314                                continue;
 315                        p->opt = rest + 1;
 316                }
 317                return get_value(p, options, all_opts, flags ^ opt_flags);
 318        }
 319
 320        if (ambiguous_option)
 321                return error("Ambiguous option: %s "
 322                        "(could be --%s%s or --%s%s)",
 323                        arg,
 324                        (ambiguous_flags & OPT_UNSET) ?  "no-" : "",
 325                        ambiguous_option->long_name,
 326                        (abbrev_flags & OPT_UNSET) ?  "no-" : "",
 327                        abbrev_option->long_name);
 328        if (abbrev_option)
 329                return get_value(p, abbrev_option, all_opts, abbrev_flags);
 330        return -2;
 331}
 332
 333static int parse_nodash_opt(struct parse_opt_ctx_t *p, const char *arg,
 334                            const struct option *options)
 335{
 336        const struct option *all_opts = options;
 337
 338        for (; options->type != OPTION_END; options++) {
 339                if (!(options->flags & PARSE_OPT_NODASH))
 340                        continue;
 341                if (options->short_name == arg[0] && arg[1] == '\0')
 342                        return get_value(p, options, all_opts, OPT_SHORT);
 343        }
 344        return -2;
 345}
 346
 347static void check_typos(const char *arg, const struct option *options)
 348{
 349        if (strlen(arg) < 3)
 350                return;
 351
 352        if (starts_with(arg, "no-")) {
 353                error ("did you mean `--%s` (with two dashes ?)", arg);
 354                exit(129);
 355        }
 356
 357        for (; options->type != OPTION_END; options++) {
 358                if (!options->long_name)
 359                        continue;
 360                if (starts_with(options->long_name, arg)) {
 361                        error ("did you mean `--%s` (with two dashes ?)", arg);
 362                        exit(129);
 363                }
 364        }
 365}
 366
 367static void parse_options_check(const struct option *opts)
 368{
 369        int err = 0;
 370        char short_opts[128];
 371
 372        memset(short_opts, '\0', sizeof(short_opts));
 373        for (; opts->type != OPTION_END; opts++) {
 374                if ((opts->flags & PARSE_OPT_LASTARG_DEFAULT) &&
 375                    (opts->flags & PARSE_OPT_OPTARG))
 376                        err |= optbug(opts, "uses incompatible flags "
 377                                        "LASTARG_DEFAULT and OPTARG");
 378                if (opts->short_name) {
 379                        if (0x7F <= opts->short_name)
 380                                err |= optbug(opts, "invalid short name");
 381                        else if (short_opts[opts->short_name]++)
 382                                err |= optbug(opts, "short name already used");
 383                }
 384                if (opts->flags & PARSE_OPT_NODASH &&
 385                    ((opts->flags & PARSE_OPT_OPTARG) ||
 386                     !(opts->flags & PARSE_OPT_NOARG) ||
 387                     !(opts->flags & PARSE_OPT_NONEG) ||
 388                     opts->long_name))
 389                        err |= optbug(opts, "uses feature "
 390                                        "not supported for dashless options");
 391                switch (opts->type) {
 392                case OPTION_COUNTUP:
 393                case OPTION_BIT:
 394                case OPTION_NEGBIT:
 395                case OPTION_SET_INT:
 396                case OPTION_NUMBER:
 397                        if ((opts->flags & PARSE_OPT_OPTARG) ||
 398                            !(opts->flags & PARSE_OPT_NOARG))
 399                                err |= optbug(opts, "should not accept an argument");
 400                default:
 401                        ; /* ok. (usually accepts an argument) */
 402                }
 403                if (opts->argh &&
 404                    strcspn(opts->argh, " _") != strlen(opts->argh))
 405                        err |= optbug(opts, "multi-word argh should use dash to separate words");
 406        }
 407        if (err)
 408                exit(128);
 409}
 410
 411void parse_options_start(struct parse_opt_ctx_t *ctx,
 412                         int argc, const char **argv, const char *prefix,
 413                         const struct option *options, int flags)
 414{
 415        memset(ctx, 0, sizeof(*ctx));
 416        ctx->argc = ctx->total = argc - 1;
 417        ctx->argv = argv + 1;
 418        ctx->out  = argv;
 419        ctx->prefix = prefix;
 420        ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
 421        ctx->flags = flags;
 422        if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
 423            (flags & PARSE_OPT_STOP_AT_NON_OPTION))
 424                die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
 425        parse_options_check(options);
 426}
 427
 428static int usage_with_options_internal(struct parse_opt_ctx_t *,
 429                                       const char * const *,
 430                                       const struct option *, int, int);
 431
 432int parse_options_step(struct parse_opt_ctx_t *ctx,
 433                       const struct option *options,
 434                       const char * const usagestr[])
 435{
 436        int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
 437        int err = 0;
 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                /* lone -h asks for help */
 455                if (internal_help && ctx->total == 1 && !strcmp(arg + 1, "h"))
 456                        goto show_usage;
 457
 458                if (arg[1] != '-') {
 459                        ctx->opt = arg + 1;
 460                        switch (parse_short_opt(ctx, options)) {
 461                        case -1:
 462                                goto show_usage_error;
 463                        case -2:
 464                                if (ctx->opt)
 465                                        check_typos(arg + 1, options);
 466                                if (internal_help && *ctx->opt == 'h')
 467                                        goto show_usage;
 468                                goto unknown;
 469                        }
 470                        if (ctx->opt)
 471                                check_typos(arg + 1, options);
 472                        while (ctx->opt) {
 473                                switch (parse_short_opt(ctx, options)) {
 474                                case -1:
 475                                        goto show_usage_error;
 476                                case -2:
 477                                        if (internal_help && *ctx->opt == 'h')
 478                                                goto show_usage;
 479
 480                                        /* fake a short option thing to hide the fact that we may have
 481                                         * started to parse aggregated stuff
 482                                         *
 483                                         * This is leaky, too bad.
 484                                         */
 485                                        ctx->argv[0] = xstrdup(ctx->opt - 1);
 486                                        *(char *)ctx->argv[0] = '-';
 487                                        goto unknown;
 488                                }
 489                        }
 490                        continue;
 491                }
 492
 493                if (!arg[2]) { /* "--" */
 494                        if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
 495                                ctx->argc--;
 496                                ctx->argv++;
 497                        }
 498                        break;
 499                }
 500
 501                if (internal_help && !strcmp(arg + 2, "help-all"))
 502                        return usage_with_options_internal(ctx, usagestr, options, 1, 0);
 503                if (internal_help && !strcmp(arg + 2, "help"))
 504                        goto show_usage;
 505                switch (parse_long_opt(ctx, arg + 2, options)) {
 506                case -1:
 507                        goto show_usage_error;
 508                case -2:
 509                        goto unknown;
 510                }
 511                continue;
 512unknown:
 513                if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
 514                        return PARSE_OPT_UNKNOWN;
 515                ctx->out[ctx->cpidx++] = ctx->argv[0];
 516                ctx->opt = NULL;
 517        }
 518        return PARSE_OPT_DONE;
 519
 520 show_usage_error:
 521        err = 1;
 522 show_usage:
 523        return usage_with_options_internal(ctx, usagestr, options, 0, err);
 524}
 525
 526int parse_options_end(struct parse_opt_ctx_t *ctx)
 527{
 528        memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
 529        ctx->out[ctx->cpidx + ctx->argc] = NULL;
 530        return ctx->cpidx + ctx->argc;
 531}
 532
 533int parse_options(int argc, const char **argv, const char *prefix,
 534                  const struct option *options, const char * const usagestr[],
 535                  int flags)
 536{
 537        struct parse_opt_ctx_t ctx;
 538
 539        parse_options_start(&ctx, argc, argv, prefix, options, flags);
 540        switch (parse_options_step(&ctx, options, usagestr)) {
 541        case PARSE_OPT_HELP:
 542                exit(129);
 543        case PARSE_OPT_NON_OPTION:
 544        case PARSE_OPT_DONE:
 545                break;
 546        default: /* PARSE_OPT_UNKNOWN */
 547                if (ctx.argv[0][1] == '-') {
 548                        error("unknown option `%s'", ctx.argv[0] + 2);
 549                } else if (isascii(*ctx.opt)) {
 550                        error("unknown switch `%c'", *ctx.opt);
 551                } else {
 552                        error("unknown non-ascii option in string: `%s'",
 553                              ctx.argv[0]);
 554                }
 555                usage_with_options(usagestr, options);
 556        }
 557
 558        precompose_argv(argc, argv);
 559        return parse_options_end(&ctx);
 560}
 561
 562static int usage_argh(const struct option *opts, FILE *outfile)
 563{
 564        const char *s;
 565        int literal = (opts->flags & PARSE_OPT_LITERAL_ARGHELP) || !opts->argh;
 566        if (opts->flags & PARSE_OPT_OPTARG)
 567                if (opts->long_name)
 568                        s = literal ? "[=%s]" : "[=<%s>]";
 569                else
 570                        s = literal ? "[%s]" : "[<%s>]";
 571        else
 572                s = literal ? " %s" : " <%s>";
 573        return utf8_fprintf(outfile, s, opts->argh ? _(opts->argh) : _("..."));
 574}
 575
 576#define USAGE_OPTS_WIDTH 24
 577#define USAGE_GAP         2
 578
 579static int usage_with_options_internal(struct parse_opt_ctx_t *ctx,
 580                                       const char * const *usagestr,
 581                                       const struct option *opts, int full, int err)
 582{
 583        FILE *outfile = err ? stderr : stdout;
 584
 585        if (!usagestr)
 586                return PARSE_OPT_HELP;
 587
 588        if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
 589                fprintf(outfile, "cat <<\\EOF\n");
 590
 591        fprintf_ln(outfile, _("usage: %s"), _(*usagestr++));
 592        while (*usagestr && **usagestr)
 593                /*
 594                 * TRANSLATORS: the colon here should align with the
 595                 * one in "usage: %s" translation.
 596                 */
 597                fprintf_ln(outfile, _("   or: %s"), _(*usagestr++));
 598        while (*usagestr) {
 599                if (**usagestr)
 600                        fprintf_ln(outfile, _("    %s"), _(*usagestr));
 601                else
 602                        putchar('\n');
 603                usagestr++;
 604        }
 605
 606        if (opts->type != OPTION_GROUP)
 607                fputc('\n', outfile);
 608
 609        for (; opts->type != OPTION_END; opts++) {
 610                size_t pos;
 611                int pad;
 612
 613                if (opts->type == OPTION_GROUP) {
 614                        fputc('\n', outfile);
 615                        if (*opts->help)
 616                                fprintf(outfile, "%s\n", _(opts->help));
 617                        continue;
 618                }
 619                if (!full && (opts->flags & PARSE_OPT_HIDDEN))
 620                        continue;
 621
 622                pos = fprintf(outfile, "    ");
 623                if (opts->short_name) {
 624                        if (opts->flags & PARSE_OPT_NODASH)
 625                                pos += fprintf(outfile, "%c", opts->short_name);
 626                        else
 627                                pos += fprintf(outfile, "-%c", opts->short_name);
 628                }
 629                if (opts->long_name && opts->short_name)
 630                        pos += fprintf(outfile, ", ");
 631                if (opts->long_name)
 632                        pos += fprintf(outfile, "--%s", opts->long_name);
 633                if (opts->type == OPTION_NUMBER)
 634                        pos += utf8_fprintf(outfile, _("-NUM"));
 635
 636                if ((opts->flags & PARSE_OPT_LITERAL_ARGHELP) ||
 637                    !(opts->flags & PARSE_OPT_NOARG))
 638                        pos += usage_argh(opts, outfile);
 639
 640                if (pos <= USAGE_OPTS_WIDTH)
 641                        pad = USAGE_OPTS_WIDTH - pos;
 642                else {
 643                        fputc('\n', outfile);
 644                        pad = USAGE_OPTS_WIDTH;
 645                }
 646                fprintf(outfile, "%*s%s\n", pad + USAGE_GAP, "", _(opts->help));
 647        }
 648        fputc('\n', outfile);
 649
 650        if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
 651                fputs("EOF\n", outfile);
 652
 653        return PARSE_OPT_HELP;
 654}
 655
 656void NORETURN usage_with_options(const char * const *usagestr,
 657                        const struct option *opts)
 658{
 659        usage_with_options_internal(NULL, usagestr, opts, 0, 1);
 660        exit(129);
 661}
 662
 663void NORETURN usage_msg_opt(const char *msg,
 664                   const char * const *usagestr,
 665                   const struct option *options)
 666{
 667        fprintf(stderr, "fatal: %s\n\n", msg);
 668        usage_with_options(usagestr, options);
 669}
 670
 671#undef opterror
 672int opterror(const struct option *opt, const char *reason, int flags)
 673{
 674        if (flags & OPT_SHORT)
 675                return error("switch `%c' %s", opt->short_name, reason);
 676        if (flags & OPT_UNSET)
 677                return error("option `no-%s' %s", opt->long_name, reason);
 678        return error("option `%s' %s", opt->long_name, reason);
 679}