kernel/tools/perf/util/parse-options.c

   1 #include "util.h"
   2 #include "parse-options.h"
   3 #include "cache.h"
   4 #include "header.h"
   5
   6 #define OPT_SHORT 1
   7 #define OPT_UNSET 2
   8
   9 static int opterror(const struct option *opt, const char *reason, int flags)
  10 {
  11         if (flags & OPT_SHORT)
  12                 return error("switch `%c' %s", opt->short_name, reason);
  13         if (flags & OPT_UNSET)
  14                 return error("option `no-%s' %s", opt->long_name, reason);
  15         return error("option `%s' %s", opt->long_name, reason);
  16 }
  17
  18 static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
  19                    int flags, const char **arg)
  20 {
  21         if (p->opt) {
  22                 *arg = p->opt;
  23                 p->opt = NULL;
  24         } else if ((opt->flags & PARSE_OPT_LASTARG_DEFAULT) && (p->argc == 1 ||
  25                     **(p->argv + 1) == '-')) {
  26                 *arg = (const char *)opt->defval;
  27         } else if (p->argc > 1) {
  28                 p->argc--;
  29                 *arg = *++p->argv;
  30         } else
  31                 return opterror(opt, "requires a value", flags);
  32         return 0;
  33 }
  34
  35 static int get_value(struct parse_opt_ctx_t *p,
  36                      const struct option *opt, int flags)
  37 {
  38         const char *s, *arg = NULL;
  39         const int unset = flags & OPT_UNSET;
  40         int err;
  41
  42         if (unset && p->opt)
  43                 return opterror(opt, "takes no value", flags);
  44         if (unset && (opt->flags & PARSE_OPT_NONEG))
  45                 return opterror(opt, "isn't available", flags);
  46         if (opt->flags & PARSE_OPT_DISABLED)
  47                 return opterror(opt, "is not usable", flags);
  48
  49         if (opt->flags & PARSE_OPT_EXCLUSIVE) {
  50                 if (p->excl_opt && p->excl_opt != opt) {
  51                         char msg[128];
  52
  53                         if (((flags & OPT_SHORT) && p->excl_opt->short_name) ||
  54                             p->excl_opt->long_name == NULL) {
  55                                 scnprintf(msg, sizeof(msg), "cannot be used with switch `%c'",
  56                                           p->excl_opt->short_name);
  57                         } else {
  58                                 scnprintf(msg, sizeof(msg), "cannot be used with %s",
  59                                           p->excl_opt->long_name);
  60                         }
  61                         opterror(opt, msg, flags);
  62                         return -3;
  63                 }
  64                 p->excl_opt = opt;
  65         }
  66         if (!(flags & OPT_SHORT) && p->opt) {
  67                 switch (opt->type) {
  68                 case OPTION_CALLBACK:
  69                         if (!(opt->flags & PARSE_OPT_NOARG))
  70                                 break;
  71                         /* FALLTHROUGH */
  72                 case OPTION_BOOLEAN:
  73                 case OPTION_INCR:
  74                 case OPTION_BIT:
  75                 case OPTION_SET_UINT:
  76                 case OPTION_SET_PTR:
  77                         return opterror(opt, "takes no value", flags);
  78                 case OPTION_END:
  79                 case OPTION_ARGUMENT:
  80                 case OPTION_GROUP:
  81                 case OPTION_STRING:
  82                 case OPTION_INTEGER:
  83                 case OPTION_UINTEGER:
  84                 case OPTION_LONG:
  85                 case OPTION_U64:
  86                 default:
  87                         break;
  88                 }
  89         }
  90
  91         switch (opt->type) {
  92         case OPTION_BIT:
  93                 if (unset)
  94                         *(int *)opt->value &= ~opt->defval;
  95                 else
  96                         *(int *)opt->value |= opt->defval;
  97                 return 0;
  98
  99         case OPTION_BOOLEAN:
 100                 *(bool *)opt->value = unset ? false : true;
 101                 if (opt->set)
 102                         *(bool *)opt->set = true;
 103                 return 0;
 104
 105         case OPTION_INCR:
 106                 *(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
 107                 return 0;
 108
 109         case OPTION_SET_UINT:
 110                 *(unsigned int *)opt->value = unset ? 0 : opt->defval;
 111                 return 0;
 112
 113         case OPTION_SET_PTR:
 114                 *(void **)opt->value = unset ? NULL : (void *)opt->defval;
 115                 return 0;
 116
 117         case OPTION_STRING:
 118                 err = 0;
 119                 if (unset)
 120                         *(const char **)opt->value = NULL;
 121                 else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 122                         *(const char **)opt->value = (const char *)opt->defval;
 123                 else
 124                         err = get_arg(p, opt, flags, (const char **)opt->value);
 125
 126                 /* PARSE_OPT_NOEMPTY: Allow NULL but disallow empty string. */
 127                 if (opt->flags & PARSE_OPT_NOEMPTY) {
 128                         const char *val = *(const char **)opt->value;
 129
 130                         if (!val)
 131                                 return err;
 132
 133                         /* Similar to unset if we are given an empty string. */
 134                         if (val[0] == '\0') {
 135                                 *(const char **)opt->value = NULL;
 136                                 return 0;
 137                         }
 138                 }
 139
 140                 return err;
 141
 142         case OPTION_CALLBACK:
 143                 if (unset)
 144                         return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;
 145                 if (opt->flags & PARSE_OPT_NOARG)
 146                         return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
 147                 if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 148                         return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
 149                 if (get_arg(p, opt, flags, &arg))
 150                         return -1;
 151                 return (*opt->callback)(opt, arg, 0) ? (-1) : 0;
 152
 153         case OPTION_INTEGER:
 154                 if (unset) {
 155                         *(int *)opt->value = 0;
 156                         return 0;
 157                 }
 158                 if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
 159                         *(int *)opt->value = opt->defval;
 160                         return 0;
 161                 }
 162                 if (get_arg(p, opt, flags, &arg))
 163                         return -1;
 164                 *(int *)opt->value = strtol(arg, (char **)&s, 10);
 165                 if (*s)
 166                         return opterror(opt, "expects a numerical value", flags);
 167                 return 0;
 168
 169         case OPTION_UINTEGER:
 170                 if (unset) {
 171                         *(unsigned int *)opt->value = 0;
 172                         return 0;
 173                 }
 174                 if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
 175                         *(unsigned int *)opt->value = opt->defval;
 176                         return 0;
 177                 }
 178                 if (get_arg(p, opt, flags, &arg))
 179                         return -1;
 180                 *(unsigned int *)opt->value = strtol(arg, (char **)&s, 10);
 181                 if (*s)
 182                         return opterror(opt, "expects a numerical value", flags);
 183                 return 0;
 184
 185         case OPTION_LONG:
 186                 if (unset) {
 187                         *(long *)opt->value = 0;
 188                         return 0;
 189                 }
 190                 if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
 191                         *(long *)opt->value = opt->defval;
 192                         return 0;
 193                 }
 194                 if (get_arg(p, opt, flags, &arg))
 195                         return -1;
 196                 *(long *)opt->value = strtol(arg, (char **)&s, 10);
 197                 if (*s)
 198                         return opterror(opt, "expects a numerical value", flags);
 199                 return 0;
 200
 201         case OPTION_U64:
 202                 if (unset) {
 203                         *(u64 *)opt->value = 0;
 204                         return 0;
 205                 }
 206                 if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
 207                         *(u64 *)opt->value = opt->defval;
 208                         return 0;
 209                 }
 210                 if (get_arg(p, opt, flags, &arg))
 211                         return -1;
 212                 *(u64 *)opt->value = strtoull(arg, (char **)&s, 10);
 213                 if (*s)
 214                         return opterror(opt, "expects a numerical value", flags);
 215                 return 0;
 216
 217         case OPTION_END:
 218         case OPTION_ARGUMENT:
 219         case OPTION_GROUP:
 220         default:
 221                 die("should not happen, someone must be hit on the forehead");
 222         }
 223 }
 224
 225 static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *options)
 226 {
 227         for (; options->type != OPTION_END; options++) {
 228                 if (options->short_name == *p->opt) {
 229                         p->opt = p->opt[1] ? p->opt + 1 : NULL;
 230                         return get_value(p, options, OPT_SHORT);
 231                 }
 232         }
 233         return -2;
 234 }
 235
 236 static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
 237                           const struct option *options)
 238 {
 239         const char *arg_end = strchr(arg, '=');
 240         const struct option *abbrev_option = NULL, *ambiguous_option = NULL;
 241         int abbrev_flags = 0, ambiguous_flags = 0;
 242
 243         if (!arg_end)
 244                 arg_end = arg + strlen(arg);
 245
 246         for (; options->type != OPTION_END; options++) {
 247                 const char *rest;
 248                 int flags = 0;
 249
 250                 if (!options->long_name)
 251                         continue;
 252
 253                 rest = skip_prefix(arg, options->long_name);
 254                 if (options->type == OPTION_ARGUMENT) {
 255                         if (!rest)
 256                                 continue;
 257                         if (*rest == '=')
 258                                 return opterror(options, "takes no value", flags);
 259                         if (*rest)
 260                                 continue;
 261                         p->out[p->cpidx++] = arg - 2;
 262                         return 0;
 263                 }
 264                 if (!rest) {
 265                         if (!prefixcmp(options->long_name, "no-")) {
 266                                 /*
 267                                  * The long name itself starts with "no-", so
 268                                  * accept the option without "no-" so that users
 269                                  * do not have to enter "no-no-" to get the
 270                                  * negation.
 271                                  */
 272                                 rest = skip_prefix(arg, options->long_name + 3);
 273                                 if (rest) {
 274                                         flags |= OPT_UNSET;
 275                                         goto match;
 276                                 }
 277                                 /* Abbreviated case */
 278                                 if (!prefixcmp(options->long_name + 3, arg)) {
 279                                         flags |= OPT_UNSET;
 280                                         goto is_abbreviated;
 281                                 }
 282                         }
 283                         /* abbreviated? */
 284                         if (!strncmp(options->long_name, arg, arg_end - arg)) {
 285 is_abbreviated:
 286                                 if (abbrev_option) {
 287                                         /*
 288                                          * If this is abbreviated, it is
 289                                          * ambiguous. So when there is no
 290                                          * exact match later, we need to
 291                                          * error out.
 292                                          */
 293                                         ambiguous_option = abbrev_option;
 294                                         ambiguous_flags = abbrev_flags;
 295                                 }
 296                                 if (!(flags & OPT_UNSET) && *arg_end)
 297                                         p->opt = arg_end + 1;
 298                                 abbrev_option = options;
 299                                 abbrev_flags = flags;
 300                                 continue;
 301                         }
 302                         /* negated and abbreviated very much? */
 303                         if (!prefixcmp("no-", arg)) {
 304                                 flags |= OPT_UNSET;
 305                                 goto is_abbreviated;
 306                         }
 307                         /* negated? */
 308                         if (strncmp(arg, "no-", 3))
 309                                 continue;
 310                         flags |= OPT_UNSET;
 311                         rest = skip_prefix(arg + 3, options->long_name);
 312                         /* abbreviated and negated? */
 313                         if (!rest && !prefixcmp(options->long_name, arg + 3))
 314                                 goto is_abbreviated;
 315                         if (!rest)
 316                                 continue;
 317                 }
 318 match:
 319                 if (*rest) {
 320                         if (*rest != '=')
 321                                 continue;
 322                         p->opt = rest + 1;
 323                 }
 324                 return get_value(p, options, flags);
 325         }
 326
 327         if (ambiguous_option)
 328                 return error("Ambiguous option: %s "
 329                         "(could be --%s%s or --%s%s)",
 330                         arg,
 331                         (ambiguous_flags & OPT_UNSET) ?  "no-" : "",
 332                         ambiguous_option->long_name,
 333                         (abbrev_flags & OPT_UNSET) ?  "no-" : "",
 334                         abbrev_option->long_name);
 335         if (abbrev_option)
 336                 return get_value(p, abbrev_option, abbrev_flags);
 337         return -2;
 338 }
 339
 340 static void check_typos(const char *arg, const struct option *options)
 341 {
 342         if (strlen(arg) < 3)
 343                 return;
 344
 345         if (!prefixcmp(arg, "no-")) {
 346                 error ("did you mean `--%s` (with two dashes ?)", arg);
 347                 exit(129);
 348         }
 349
 350         for (; options->type != OPTION_END; options++) {
 351                 if (!options->long_name)
 352                         continue;
 353                 if (!prefixcmp(options->long_name, arg)) {
 354                         error ("did you mean `--%s` (with two dashes ?)", arg);
 355                         exit(129);
 356                 }
 357         }
 358 }
 359
 360 void parse_options_start(struct parse_opt_ctx_t *ctx,
 361                          int argc, const char **argv, int flags)
 362 {
 363         memset(ctx, 0, sizeof(*ctx));
 364         ctx->argc = argc - 1;
 365         ctx->argv = argv + 1;
 366         ctx->out  = argv;
 367         ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
 368         ctx->flags = flags;
 369         if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
 370             (flags & PARSE_OPT_STOP_AT_NON_OPTION))
 371                 die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
 372 }
 373
 374 static int usage_with_options_internal(const char * const *,
 375                                        const struct option *, int);
 376
 377 int parse_options_step(struct parse_opt_ctx_t *ctx,
 378                        const struct option *options,
 379                        const char * const usagestr[])
 380 {
 381         int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
 382         int excl_short_opt = 1;
 383         const char *arg;
 384
 385         /* we must reset ->opt, unknown short option leave it dangling */
 386         ctx->opt = NULL;
 387
 388         for (; ctx->argc; ctx->argc--, ctx->argv++) {
 389                 arg = ctx->argv[0];
 390                 if (*arg != '-' || !arg[1]) {
 391                         if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
 392                                 break;
 393                         ctx->out[ctx->cpidx++] = ctx->argv[0];
 394                         continue;
 395                 }
 396
 397                 if (arg[1] != '-') {
 398                         ctx->opt = ++arg;
 399                         if (internal_help && *ctx->opt == 'h')
 400                                 return usage_with_options_internal(usagestr, options, 0);
 401                         switch (parse_short_opt(ctx, options)) {
 402                         case -1:
 403                                 return parse_options_usage(usagestr, options, arg, 1);
 404                         case -2:
 405                                 goto unknown;
 406                         case -3:
 407                                 goto exclusive;
 408                         default:
 409                                 break;
 410                         }
 411                         if (ctx->opt)
 412                                 check_typos(arg, options);
 413                         while (ctx->opt) {
 414                                 if (internal_help && *ctx->opt == 'h')
 415                                         return usage_with_options_internal(usagestr, options, 0);
 416                                 arg = ctx->opt;
 417                                 switch (parse_short_opt(ctx, options)) {
 418                                 case -1:
 419                                         return parse_options_usage(usagestr, options, arg, 1);
 420                                 case -2:
 421                                         /* fake a short option thing to hide the fact that we may have
 422                                          * started to parse aggregated stuff
 423                                          *
 424                                          * This is leaky, too bad.
 425                                          */
 426                                         ctx->argv[0] = strdup(ctx->opt - 1);
 427                                         *(char *)ctx->argv[0] = '-';
 428                                         goto unknown;
 429                                 case -3:
 430                                         goto exclusive;
 431                                 default:
 432                                         break;
 433                                 }
 434                         }
 435                         continue;
 436                 }
 437
 438                 if (!arg[2]) { /* "--" */
 439                         if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
 440                                 ctx->argc--;
 441                                 ctx->argv++;
 442                         }
 443                         break;
 444                 }
 445
 446                 arg += 2;
 447                 if (internal_help && !strcmp(arg, "help-all"))
 448                         return usage_with_options_internal(usagestr, options, 1);
 449                 if (internal_help && !strcmp(arg, "help"))
 450                         return usage_with_options_internal(usagestr, options, 0);
 451                 if (!strcmp(arg, "list-opts"))
 452                         return PARSE_OPT_LIST_OPTS;
 453                 if (!strcmp(arg, "list-cmds"))
 454                         return PARSE_OPT_LIST_SUBCMDS;
 455                 switch (parse_long_opt(ctx, arg, options)) {
 456                 case -1:
 457                         return parse_options_usage(usagestr, options, arg, 0);
 458                 case -2:
 459                         goto unknown;
 460                 case -3:
 461                         excl_short_opt = 0;
 462                         goto exclusive;
 463                 default:
 464                         break;
 465                 }
 466                 continue;
 467 unknown:
 468                 if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
 469                         return PARSE_OPT_UNKNOWN;
 470                 ctx->out[ctx->cpidx++] = ctx->argv[0];
 471                 ctx->opt = NULL;
 472         }
 473         return PARSE_OPT_DONE;
 474
 475 exclusive:
 476         parse_options_usage(usagestr, options, arg, excl_short_opt);
 477         if ((excl_short_opt && ctx->excl_opt->short_name) ||
 478             ctx->excl_opt->long_name == NULL) {
 479                 char opt = ctx->excl_opt->short_name;
 480                 parse_options_usage(NULL, options, &opt, 1);
 481         } else {
 482                 parse_options_usage(NULL, options, ctx->excl_opt->long_name, 0);
 483         }
 484         return PARSE_OPT_HELP;
 485 }
 486
 487 int parse_options_end(struct parse_opt_ctx_t *ctx)
 488 {
 489         memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
 490         ctx->out[ctx->cpidx + ctx->argc] = NULL;
 491         return ctx->cpidx + ctx->argc;
 492 }
 493
 494 int parse_options_subcommand(int argc, const char **argv, const struct option *options,
 495                         const char *const subcommands[], const char *usagestr[], int flags)
 496 {
 497         struct parse_opt_ctx_t ctx;
 498
 499         perf_header__set_cmdline(argc, argv);
 500
 501         /* build usage string if it's not provided */
 502         if (subcommands && !usagestr[0]) {
 503                 struct strbuf buf = STRBUF_INIT;
 504
 505                 strbuf_addf(&buf, "perf %s [<options>] {", argv[0]);
 506                 for (int i = 0; subcommands[i]; i++) {
 507                         if (i)
 508                                 strbuf_addstr(&buf, "|");
 509                         strbuf_addstr(&buf, subcommands[i]);
 510                 }
 511                 strbuf_addstr(&buf, "}");
 512
 513                 usagestr[0] = strdup(buf.buf);
 514                 strbuf_release(&buf);
 515         }
 516
 517         parse_options_start(&ctx, argc, argv, flags);
 518         switch (parse_options_step(&ctx, options, usagestr)) {
 519         case PARSE_OPT_HELP:
 520                 exit(129);
 521         case PARSE_OPT_DONE:
 522                 break;
 523         case PARSE_OPT_LIST_OPTS:
 524                 while (options->type != OPTION_END) {
 525                         if (options->long_name)
 526                                 printf("--%s ", options->long_name);
 527                         options++;
 528                 }
 529                 putchar('\n');
 530                 exit(130);
 531         case PARSE_OPT_LIST_SUBCMDS:
 532                 if (subcommands) {
 533                         for (int i = 0; subcommands[i]; i++)
 534                                 printf("%s ", subcommands[i]);
 535                 }
 536                 putchar('\n');
 537                 exit(130);
 538         default: /* PARSE_OPT_UNKNOWN */
 539                 if (ctx.argv[0][1] == '-') {
 540                         error("unknown option `%s'", ctx.argv[0] + 2);
 541                 } else {
 542                         error("unknown switch `%c'", *ctx.opt);
 543                 }
 544                 usage_with_options(usagestr, options);
 545         }
 546
 547         return parse_options_end(&ctx);
 548 }
 549
 550 int parse_options(int argc, const char **argv, const struct option *options,
 551                   const char * const usagestr[], int flags)
 552 {
 553         return parse_options_subcommand(argc, argv, options, NULL,
 554                                         (const char **) usagestr, flags);
 555 }
 556
 557 #define USAGE_OPTS_WIDTH 24
 558 #define USAGE_GAP         2
 559
 560 static void print_option_help(const struct option *opts, int full)
 561 {
 562         size_t pos;
 563         int pad;
 564
 565         if (opts->type == OPTION_GROUP) {
 566                 fputc('\n', stderr);
 567                 if (*opts->help)
 568                         fprintf(stderr, "%s\n", opts->help);
 569                 return;
 570         }
 571         if (!full && (opts->flags & PARSE_OPT_HIDDEN))
 572                 return;
 573         if (opts->flags & PARSE_OPT_DISABLED)
 574                 return;
 575
 576         pos = fprintf(stderr, "    ");
 577         if (opts->short_name)
 578                 pos += fprintf(stderr, "-%c", opts->short_name);
 579         else
 580                 pos += fprintf(stderr, "    ");
 581
 582         if (opts->long_name && opts->short_name)
 583                 pos += fprintf(stderr, ", ");
 584         if (opts->long_name)
 585                 pos += fprintf(stderr, "--%s", opts->long_name);
 586
 587         switch (opts->type) {
 588         case OPTION_ARGUMENT:
 589                 break;
 590         case OPTION_LONG:
 591         case OPTION_U64:
 592         case OPTION_INTEGER:
 593         case OPTION_UINTEGER:
 594                 if (opts->flags & PARSE_OPT_OPTARG)
 595                         if (opts->long_name)
 596                                 pos += fprintf(stderr, "[=<n>]");
 597                         else
 598                                 pos += fprintf(stderr, "[<n>]");
 599                 else
 600                         pos += fprintf(stderr, " <n>");
 601                 break;
 602         case OPTION_CALLBACK:
 603                 if (opts->flags & PARSE_OPT_NOARG)
 604                         break;
 605                 /* FALLTHROUGH */
 606         case OPTION_STRING:
 607                 if (opts->argh) {
 608                         if (opts->flags & PARSE_OPT_OPTARG)
 609                                 if (opts->long_name)
 610                                         pos += fprintf(stderr, "[=<%s>]", opts->argh);
 611                                 else
 612                                         pos += fprintf(stderr, "[<%s>]", opts->argh);
 613                         else
 614                                 pos += fprintf(stderr, " <%s>", opts->argh);
 615                 } else {
 616                         if (opts->flags & PARSE_OPT_OPTARG)
 617                                 if (opts->long_name)
 618                                         pos += fprintf(stderr, "[=...]");
 619                                 else
 620                                         pos += fprintf(stderr, "[...]");
 621                         else
 622                                 pos += fprintf(stderr, " ...");
 623                 }
 624                 break;
 625         default: /* OPTION_{BIT,BOOLEAN,SET_UINT,SET_PTR} */
 626         case OPTION_END:
 627         case OPTION_GROUP:
 628         case OPTION_BIT:
 629         case OPTION_BOOLEAN:
 630         case OPTION_INCR:
 631         case OPTION_SET_UINT:
 632         case OPTION_SET_PTR:
 633                 break;
 634         }
 635
 636         if (pos <= USAGE_OPTS_WIDTH)
 637                 pad = USAGE_OPTS_WIDTH - pos;
 638         else {
 639                 fputc('\n', stderr);
 640                 pad = USAGE_OPTS_WIDTH;
 641         }
 642         fprintf(stderr, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
 643 }
 644
 645 int usage_with_options_internal(const char * const *usagestr,
 646                                 const struct option *opts, int full)
 647 {
 648         if (!usagestr)
 649                 return PARSE_OPT_HELP;
 650
 651         fprintf(stderr, "\n usage: %s\n", *usagestr++);
 652         while (*usagestr && **usagestr)
 653                 fprintf(stderr, "    or: %s\n", *usagestr++);
 654         while (*usagestr) {
 655                 fprintf(stderr, "%s%s\n",
 656                                 **usagestr ? "    " : "",
 657                                 *usagestr);
 658                 usagestr++;
 659         }
 660
 661         if (opts->type != OPTION_GROUP)
 662                 fputc('\n', stderr);
 663
 664         for (  ; opts->type != OPTION_END; opts++)
 665                 print_option_help(opts, full);
 666
 667         fputc('\n', stderr);
 668
 669         return PARSE_OPT_HELP;
 670 }
 671
 672 void usage_with_options(const char * const *usagestr,
 673                         const struct option *opts)
 674 {
 675         exit_browser(false);
 676         usage_with_options_internal(usagestr, opts, 0);
 677         exit(129);
 678 }
 679
 680 int parse_options_usage(const char * const *usagestr,
 681                         const struct option *opts,
 682                         const char *optstr, bool short_opt)
 683 {
 684         if (!usagestr)
 685                 goto opt;
 686
 687         fprintf(stderr, "\n usage: %s\n", *usagestr++);
 688         while (*usagestr && **usagestr)
 689                 fprintf(stderr, "    or: %s\n", *usagestr++);
 690         while (*usagestr) {
 691                 fprintf(stderr, "%s%s\n",
 692                                 **usagestr ? "    " : "",
 693                                 *usagestr);
 694                 usagestr++;
 695         }
 696         fputc('\n', stderr);
 697
 698 opt:
 699         for (  ; opts->type != OPTION_END; opts++) {
 700                 if (short_opt) {
 701                         if (opts->short_name == *optstr)
 702                                 break;
 703                         continue;
 704                 }
 705
 706                 if (opts->long_name == NULL)
 707                         continue;
 708
 709                 if (!prefixcmp(optstr, opts->long_name))
 710                         break;
 711                 if (!prefixcmp(optstr, "no-") &&
 712                     !prefixcmp(optstr + 3, opts->long_name))
 713                         break;
 714         }
 715
 716         if (opts->type != OPTION_END)
 717                 print_option_help(opts, 0);
 718
 719         return PARSE_OPT_HELP;
 720 }
 721
 722
 723 int parse_opt_verbosity_cb(const struct option *opt,
 724                            const char *arg __maybe_unused,
 725                            int unset)
 726 {
 727         int *target = opt->value;
 728
 729         if (unset)
 730                 /* --no-quiet, --no-verbose */
 731                 *target = 0;
 732         else if (opt->short_name == 'v') {
 733                 if (*target >= 0)
 734                         (*target)++;
 735                 else
 736                         *target = 1;
 737         } else {
 738                 if (*target <= 0)
 739                         (*target)--;
 740                 else
 741                         *target = -1;
 742         }
 743         return 0;
 744 }
 745
 746 void set_option_flag(struct option *opts, int shortopt, const char *longopt,
 747                      int flag)
 748 {
 749         for (; opts->type != OPTION_END; opts++) {
 750                 if ((shortopt && opts->short_name == shortopt) ||
 751                     (opts->long_name && longopt &&
 752                      !strcmp(opts->long_name, longopt))) {
 753                         opts->flags |= flag;
 754                         break;
 755                 }
 756         }
 757 }