parse-options.c

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