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 static 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
  15 int 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
  26 static 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
  42 static 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
  50 static 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
  82 static 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
 205 static 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
 239 static 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
 254 again:
 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)) {
 270 is_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
 334 static 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
 348 static 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
 368 static 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
 412 void 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
 429 static int usage_with_options_internal(struct parse_opt_ctx_t *,
 430                                        const char * const *,
 431                                        const struct option *, int, int);
 432
 433 int 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;
 507 unknown:
 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
 516 int 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
 523 int 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
 552 static 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
 569 static 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
 644 void 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
 651 void 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
 659 static 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
 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 }