1 /* Hierarchial argument parsing, layered over getopt
2 Copyright (C) 1995-2000, 2002 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Written by Miles Bader <miles@gnu.ai.mit.edu>.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License along
17 with this program; if not, write to the Free Software Foundation,
18 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
31 /* This is for other GNU distributions with internationalized messages.
32 When compiling libc, the _ macro is predefined. */
33 # if defined HAVE_LIBINTL_H || defined _LIBC
37 # define dgettext(domain, msgid) \
38 INTUSE(__dcgettext) (domain, msgid, LC_MESSAGES)
41 # define dgettext(domain, msgid) (msgid)
42 # define gettext(msgid) (msgid)
46 # define N_(msgid) (msgid)
50 #include <bits/libc-lock.h>
52 #ifdef HAVE_CTHREADS_H
58 #include "argp-namefrob.h"
60 /* Getopt return values. */
61 #define KEY_END (-1) /* The end of the options. */
62 #define KEY_ARG 1 /* A non-option argument. */
63 #define KEY_ERR '?' /* An error parsing the options. */
65 /* The meta-argument used to prevent any further arguments being interpreted
69 /* The number of bits we steal in a long-option value for our own use. */
70 #define GROUP_BITS CHAR_BIT
72 /* The number of bits available for the user value. */
73 #define USER_BITS ((sizeof ((struct option *)0)->val * CHAR_BIT) - GROUP_BITS)
74 #define USER_MASK ((1 << USER_BITS) - 1)
76 /* EZ alias for ARGP_ERR_UNKNOWN. */
77 #define EBADKEY ARGP_ERR_UNKNOWN
79 /* Default options. */
81 /* When argp is given the --HANG switch, _ARGP_HANG is set and argp will sleep
82 for one second intervals, decrementing _ARGP_HANG until it's zero. Thus
83 you can force the program to continue by attaching a debugger and setting
86 XXX This variable used to be exported. But there seems to be no
87 need, at least not inside libc. */
91 volatile int _argp_hang;
93 #define OPT_PROGNAME -2
97 static const struct argp_option argp_default_options[] =
99 {"help", '?', 0, 0, N_("Give this help list"), -1},
100 {"usage", OPT_USAGE, 0, 0, N_("Give a short usage message")},
101 {"program-name",OPT_PROGNAME,"NAME", OPTION_HIDDEN, N_("Set the program name")},
102 {"HANG", OPT_HANG, "SECS", OPTION_ARG_OPTIONAL | OPTION_HIDDEN,
103 N_("Hang for SECS seconds (default 3600)")},
108 argp_default_parser (int key, char *arg, struct argp_state *state)
113 __argp_state_help (state, state->out_stream, ARGP_HELP_STD_HELP);
116 __argp_state_help (state, state->out_stream,
117 ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
120 case OPT_PROGNAME: /* Set the program name. */
121 #if defined _LIBC || HAVE_DECL_PROGRAM_INVOCATION_NAME
122 program_invocation_name = arg;
124 /* [Note that some systems only have PROGRAM_INVOCATION_SHORT_NAME (aka
125 __PROGNAME), in which case, PROGRAM_INVOCATION_NAME is just defined
126 to be that, so we have to be a bit careful here.] */
128 /* Update what we use for messages. */
129 state->name = strrchr (arg, '/');
135 #if defined _LIBC || HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME
136 program_invocation_short_name = state->name;
139 if ((state->flags & (ARGP_PARSE_ARGV0 | ARGP_NO_ERRS))
141 /* Update what getopt uses too. */
142 state->argv[0] = arg;
147 _argp_hang = atoi (arg ? arg : "3600");
148 while (_argp_hang-- > 0)
158 static const struct argp argp_default_argp =
159 {argp_default_options, &argp_default_parser, NULL, NULL, NULL, NULL, "libc"};
162 static const struct argp_option argp_version_options[] =
164 {"version", 'V', 0, 0, N_("Print program version"), -1},
169 argp_version_parser (int key, char *arg, struct argp_state *state)
174 if (argp_program_version_hook)
175 (*argp_program_version_hook) (state->out_stream, state);
176 else if (argp_program_version)
177 fprintf (state->out_stream, "%s\n", argp_program_version);
179 __argp_error (state, dgettext (state->root_argp->argp_domain,
180 "(PROGRAM ERROR) No version known!?"));
181 if (! (state->flags & ARGP_NO_EXIT))
190 static const struct argp argp_version_argp =
191 {argp_version_options, &argp_version_parser, NULL, NULL, NULL, NULL, "libc"};
193 /* Returns the offset into the getopt long options array LONG_OPTIONS of a
194 long option with called NAME, or -1 if none is found. Passing NULL as
195 NAME will return the number of options. */
197 find_long_option (struct option *long_options, const char *name)
199 struct option *l = long_options;
200 while (l->name != NULL)
201 if (name != NULL && strcmp (l->name, name) == 0)
202 return l - long_options;
206 return l - long_options;
211 /* If we can, we regulate access to getopt, which is non-reentrant, with a
212 mutex. Since the case we're trying to guard against is two different
213 threads interfering, and it's possible that someone might want to call
214 argp_parse recursively (they're careful), we use a recursive lock if
219 __libc_lock_define_initialized_recursive (static, getopt_lock)
220 #define LOCK_GETOPT __libc_lock_lock_recursive (getopt_lock)
221 #define UNLOCK_GETOPT __libc_lock_unlock_recursive (getopt_lock)
224 #ifdef HAVE_CTHREADS_H
226 static struct mutex getopt_lock = MUTEX_INITIALIZER;
227 #define LOCK_GETOPT mutex_lock (&getopt_lock)
228 #define UNLOCK_GETOPT mutex_unlock (&getopt_lock)
230 #else /* !HAVE_CTHREADS_H */
232 #define LOCK_GETOPT (void)0
233 #define UNLOCK_GETOPT (void)0
235 #endif /* HAVE_CTHREADS_H */
238 /* This hack to allow programs that know what's going on to call argp
239 recursively. If someday argp is changed not to use the non-reentrant
240 getopt interface, we can get rid of this shit. XXX */
242 _argp_unlock_xxx (void)
247 /* The state of a `group' during parsing. Each group corresponds to a
248 particular argp structure from the tree of such descending from the top
249 level argp passed to argp_parse. */
252 /* This group's parsing function. */
253 argp_parser_t parser;
255 /* Which argp this group is from. */
256 const struct argp *argp;
258 /* Points to the point in SHORT_OPTS corresponding to the end of the short
259 options for this group. We use it to determine from which group a
260 particular short options is from. */
263 /* The number of non-option args sucessfully handled by this parser. */
264 unsigned args_processed;
266 /* This group's parser's parent's group. */
267 struct group *parent;
268 unsigned parent_index; /* And the our position in the parent. */
270 /* These fields are swapped into and out of the state structure when
271 calling this group's parser. */
272 void *input, **child_inputs;
276 /* Call GROUP's parser with KEY and ARG, swapping any group-specific info
277 from STATE before calling, and back into state afterwards. If GROUP has
278 no parser, EBADKEY is returned. */
280 group_parse (struct group *group, struct argp_state *state, int key, char *arg)
285 state->hook = group->hook;
286 state->input = group->input;
287 state->child_inputs = group->child_inputs;
288 state->arg_num = group->args_processed;
289 err = (*group->parser)(key, arg, state);
290 group->hook = state->hook;
299 const struct argp *argp;
301 /* SHORT_OPTS is the getopt short options string for the union of all the
302 groups of options. */
304 /* LONG_OPTS is the array of getop long option structures for the union of
305 all the groups of options. */
306 struct option *long_opts;
308 /* States of the various parsing groups. */
309 struct group *groups;
310 /* The end of the GROUPS array. */
311 struct group *egroup;
312 /* An vector containing storage for the CHILD_INPUTS field in all groups. */
315 /* True if we think using getopt is still useful; if false, then
316 remaining arguments are just passed verbatim with ARGP_KEY_ARG. This is
317 cleared whenever getopt returns KEY_END, but may be set again if the user
318 moves the next argument pointer backwards. */
321 /* State block supplied to parsing routines. */
322 struct argp_state state;
324 /* Memory used by this parser. */
328 /* The next usable entries in the various parser tables being filled in by
330 struct parser_convert_state
332 struct parser *parser;
334 struct option *long_end;
335 void **child_inputs_end;
338 /* Converts all options in ARGP (which is put in GROUP) and ancestors
339 into getopt options stored in SHORT_OPTS and LONG_OPTS; SHORT_END and
340 CVT->LONG_END are the points at which new options are added. Returns the
341 next unused group entry. CVT holds state used during the conversion. */
342 static struct group *
343 convert_options (const struct argp *argp,
344 struct group *parent, unsigned parent_index,
345 struct group *group, struct parser_convert_state *cvt)
347 /* REAL is the most recent non-alias value of OPT. */
348 const struct argp_option *real = argp->options;
349 const struct argp_child *children = argp->children;
351 if (real || argp->parser)
353 const struct argp_option *opt;
356 for (opt = real; !__option_is_end (opt); opt++)
358 if (! (opt->flags & OPTION_ALIAS))
359 /* OPT isn't an alias, so we can use values from it. */
362 if (! (real->flags & OPTION_DOC))
363 /* A real option (not just documentation). */
365 if (__option_is_short (opt))
366 /* OPT can be used as a short option. */
368 *cvt->short_end++ = opt->key;
371 *cvt->short_end++ = ':';
372 if (real->flags & OPTION_ARG_OPTIONAL)
373 *cvt->short_end++ = ':';
375 *cvt->short_end = '\0'; /* keep 0 terminated */
379 && find_long_option (cvt->parser->long_opts, opt->name) < 0)
380 /* OPT can be used as a long option. */
382 cvt->long_end->name = opt->name;
383 cvt->long_end->has_arg =
385 ? (real->flags & OPTION_ARG_OPTIONAL
389 cvt->long_end->flag = 0;
390 /* we add a disambiguating code to all the user's
391 values (which is removed before we actually call
392 the function to parse the value); this means that
393 the user loses use of the high 8 bits in all his
394 values (the sign of the lower bits is preserved
397 ((opt->key | real->key) & USER_MASK)
398 + (((group - cvt->parser->groups) + 1) << USER_BITS);
400 /* Keep the LONG_OPTS list terminated. */
401 (++cvt->long_end)->name = NULL;
406 group->parser = argp->parser;
408 group->short_end = cvt->short_end;
409 group->args_processed = 0;
410 group->parent = parent;
411 group->parent_index = parent_index;
414 group->child_inputs = 0;
417 /* Assign GROUP's CHILD_INPUTS field some space from
418 CVT->child_inputs_end.*/
420 unsigned num_children = 0;
421 while (children[num_children].argp)
423 group->child_inputs = cvt->child_inputs_end;
424 cvt->child_inputs_end += num_children;
435 while (children->argp)
437 convert_options (children++->argp, parent, index++, group, cvt);
443 /* Find the merged set of getopt options, with keys appropiately prefixed. */
445 parser_convert (struct parser *parser, const struct argp *argp, int flags)
447 struct parser_convert_state cvt;
450 cvt.short_end = parser->short_opts;
451 cvt.long_end = parser->long_opts;
452 cvt.child_inputs_end = parser->child_inputs;
454 if (flags & ARGP_IN_ORDER)
455 *cvt.short_end++ = '-';
456 else if (flags & ARGP_NO_ARGS)
457 *cvt.short_end++ = '+';
458 *cvt.short_end = '\0';
460 cvt.long_end->name = NULL;
465 parser->egroup = convert_options (argp, 0, 0, parser->groups, &cvt);
467 parser->egroup = parser->groups; /* No parsers at all! */
470 /* Lengths of various parser fields which we will allocated. */
473 size_t short_len; /* Getopt short options string. */
474 size_t long_len; /* Getopt long options vector. */
475 size_t num_groups; /* Group structures we allocate. */
476 size_t num_child_inputs; /* Child input slots. */
479 /* For ARGP, increments the NUM_GROUPS field in SZS by the total number of
480 argp structures descended from it, and the SHORT_LEN & LONG_LEN fields by
481 the maximum lengths of the resulting merged getopt short options string and
482 long-options array, respectively. */
484 calc_sizes (const struct argp *argp, struct parser_sizes *szs)
486 const struct argp_child *child = argp->children;
487 const struct argp_option *opt = argp->options;
489 if (opt || argp->parser)
495 while (!__option_is_end (opt++))
497 szs->short_len += num_opts * 3; /* opt + up to 2 `:'s */
498 szs->long_len += num_opts;
505 calc_sizes ((child++)->argp, szs);
506 szs->num_child_inputs++;
510 /* Initializes PARSER to parse ARGP in a manner described by FLAGS. */
512 parser_init (struct parser *parser, const struct argp *argp,
513 int argc, char **argv, int flags, void *input)
517 struct parser_sizes szs;
519 szs.short_len = (flags & ARGP_NO_ARGS) ? 0 : 1;
522 szs.num_child_inputs = 0;
525 calc_sizes (argp, &szs);
527 /* Lengths of the various bits of storage used by PARSER. */
528 #define GLEN (szs.num_groups + 1) * sizeof (struct group)
529 #define CLEN (szs.num_child_inputs * sizeof (void *))
530 #define LLEN ((szs.long_len + 1) * sizeof (struct option))
531 #define SLEN (szs.short_len + 1)
533 parser->storage = malloc (GLEN + CLEN + LLEN + SLEN);
534 if (! parser->storage)
537 parser->groups = parser->storage;
538 parser->child_inputs = parser->storage + GLEN;
539 parser->long_opts = parser->storage + GLEN + CLEN;
540 parser->short_opts = parser->storage + GLEN + CLEN + LLEN;
542 memset (parser->child_inputs, 0, szs.num_child_inputs * sizeof (void *));
543 parser_convert (parser, argp, flags);
545 memset (&parser->state, 0, sizeof (struct argp_state));
546 parser->state.root_argp = parser->argp;
547 parser->state.argc = argc;
548 parser->state.argv = argv;
549 parser->state.flags = flags;
550 parser->state.err_stream = stderr;
551 parser->state.out_stream = stdout;
552 parser->state.next = 0; /* Tell getopt to initialize. */
553 parser->state.pstate = parser;
555 parser->try_getopt = 1;
557 /* Call each parser for the first time, giving it a chance to propagate
558 values to child parsers. */
559 if (parser->groups < parser->egroup)
560 parser->groups->input = input;
561 for (group = parser->groups;
562 group < parser->egroup && (!err || err == EBADKEY);
566 /* If a child parser, get the initial input value from the parent. */
567 group->input = group->parent->child_inputs[group->parent_index];
570 && group->argp->children && group->argp->children->argp)
571 /* For the special case where no parsing function is supplied for an
572 argp, propagate its input to its first child, if any (this just
573 makes very simple wrapper argps more convenient). */
574 group->child_inputs[0] = group->input;
576 err = group_parse (group, &parser->state, ARGP_KEY_INIT, 0);
579 err = 0; /* Some parser didn't understand. */
584 /* Getopt is (currently) non-reentrant. */
587 if (parser->state.flags & ARGP_NO_ERRS)
590 if (parser->state.flags & ARGP_PARSE_ARGV0)
591 /* getopt always skips ARGV[0], so we have to fake it out. As long
592 as OPTERR is 0, then it shouldn't actually try to access it. */
593 parser->state.argv--, parser->state.argc++;
596 opterr = 1; /* Print error messages. */
598 if (parser->state.argv == argv && argv[0])
599 /* There's an argv[0]; use it for messages. */
601 char *short_name = strrchr (argv[0], '/');
602 parser->state.name = short_name ? short_name + 1 : argv[0];
605 parser->state.name = __argp_short_program_name ();
610 /* Free any storage consumed by PARSER (but not PARSER itself). */
612 parser_finalize (struct parser *parser,
613 error_t err, int arg_ebadkey, int *end_index)
619 if (err == EBADKEY && arg_ebadkey)
620 /* Suppress errors generated by unparsed arguments. */
625 if (parser->state.next == parser->state.argc)
626 /* We successfully parsed all arguments! Call all the parsers again,
627 just a few more times... */
629 for (group = parser->groups;
630 group < parser->egroup && (!err || err==EBADKEY);
632 if (group->args_processed == 0)
633 err = group_parse (group, &parser->state, ARGP_KEY_NO_ARGS, 0);
634 for (group = parser->egroup - 1;
635 group >= parser->groups && (!err || err==EBADKEY);
637 err = group_parse (group, &parser->state, ARGP_KEY_END, 0);
640 err = 0; /* Some parser didn't understand. */
642 /* Tell the user that all arguments are parsed. */
644 *end_index = parser->state.next;
647 /* Return any remaining arguments to the user. */
648 *end_index = parser->state.next;
650 /* No way to return the remaining arguments, they must be bogus. */
652 if (!(parser->state.flags & ARGP_NO_ERRS)
653 && parser->state.err_stream)
654 fprintf (parser->state.err_stream,
655 dgettext (parser->argp->argp_domain,
656 "%s: Too many arguments\n"),
662 /* Okay, we're all done, with either an error or success; call the parsers
663 to indicate which one. */
667 /* Maybe print an error message. */
669 /* An appropriate message describing what the error was should have
670 been printed earlier. */
671 __argp_state_help (&parser->state, parser->state.err_stream,
674 /* Since we didn't exit, give each parser an error indication. */
675 for (group = parser->groups; group < parser->egroup; group++)
676 group_parse (group, &parser->state, ARGP_KEY_ERROR, 0);
679 /* Notify parsers of success, and propagate back values from parsers. */
681 /* We pass over the groups in reverse order so that child groups are
682 given a chance to do there processing before passing back a value to
684 for (group = parser->egroup - 1
685 ; group >= parser->groups && (!err || err == EBADKEY)
687 err = group_parse (group, &parser->state, ARGP_KEY_SUCCESS, 0);
689 err = 0; /* Some parser didn't understand. */
692 /* Call parsers once more, to do any final cleanup. Errors are ignored. */
693 for (group = parser->egroup - 1; group >= parser->groups; group--)
694 group_parse (group, &parser->state, ARGP_KEY_FINI, 0);
699 free (parser->storage);
704 /* Call the user parsers to parse the non-option argument VAL, at the current
705 position, returning any error. The state NEXT pointer is assumed to have
706 been adjusted (by getopt) to point after this argument; this function will
707 adjust it correctly to reflect however many args actually end up being
710 parser_parse_arg (struct parser *parser, char *val)
712 /* Save the starting value of NEXT, first adjusting it so that the arg
713 we're parsing is again the front of the arg vector. */
714 int index = --parser->state.next;
715 error_t err = EBADKEY;
717 int key = 0; /* Which of ARGP_KEY_ARG[S] we used. */
719 /* Try to parse the argument in each parser. */
720 for (group = parser->groups
721 ; group < parser->egroup && err == EBADKEY
724 parser->state.next++; /* For ARGP_KEY_ARG, consume the arg. */
726 err = group_parse (group, &parser->state, key, val);
729 /* This parser doesn't like ARGP_KEY_ARG; try ARGP_KEY_ARGS instead. */
731 parser->state.next--; /* For ARGP_KEY_ARGS, put back the arg. */
733 err = group_parse (group, &parser->state, key, 0);
739 if (key == ARGP_KEY_ARGS)
740 /* The default for ARGP_KEY_ARGS is to assume that if NEXT isn't
741 changed by the user, *all* arguments should be considered
743 parser->state.next = parser->state.argc;
745 if (parser->state.next > index)
746 /* Remember that we successfully processed a non-option
747 argument -- but only if the user hasn't gotten tricky and set
749 (--group)->args_processed += (parser->state.next - index);
751 /* The user wants to reparse some args, give getopt another try. */
752 parser->try_getopt = 1;
758 /* Call the user parsers to parse the option OPT, with argument VAL, at the
759 current position, returning any error. */
761 parser_parse_opt (struct parser *parser, int opt, char *val)
763 /* The group key encoded in the high bits; 0 for short opts or
764 group_number + 1 for long opts. */
765 int group_key = opt >> USER_BITS;
766 error_t err = EBADKEY;
769 /* A short option. By comparing OPT's position in SHORT_OPTS to the
770 various starting positions in each group's SHORT_END field, we can
771 determine which group OPT came from. */
774 char *short_index = strchr (parser->short_opts, opt);
777 for (group = parser->groups; group < parser->egroup; group++)
778 if (group->short_end > short_index)
780 err = group_parse (group, &parser->state, opt, optarg);
785 /* A long option. We use shifts instead of masking for extracting
786 the user value in order to preserve the sign. */
788 group_parse (&parser->groups[group_key - 1], &parser->state,
789 (opt << GROUP_BITS) >> GROUP_BITS, optarg);
792 /* At least currently, an option not recognized is an error in the
793 parser, because we pre-compute which parser is supposed to deal
796 static const char bad_key_err[] =
797 N_("(PROGRAM ERROR) Option should have been recognized!?");
799 __argp_error (&parser->state, "-%c: %s", opt,
800 dgettext (parser->argp->argp_domain, bad_key_err));
803 struct option *long_opt = parser->long_opts;
804 while (long_opt->val != opt && long_opt->name)
806 __argp_error (&parser->state, "--%s: %s",
807 long_opt->name ? long_opt->name : "???",
808 dgettext (parser->argp->argp_domain, bad_key_err));
815 /* Parse the next argument in PARSER (as indicated by PARSER->state.next).
816 Any error from the parsers is returned, and *ARGP_EBADKEY indicates
817 whether a value of EBADKEY is due to an unrecognized argument (which is
818 generally not fatal). */
820 parser_parse_next (struct parser *parser, int *arg_ebadkey)
825 if (parser->state.quoted && parser->state.next < parser->state.quoted)
826 /* The next argument pointer has been moved to before the quoted
827 region, so pretend we never saw the quoting `--', and give getopt
828 another chance. If the user hasn't removed it, getopt will just
830 parser->state.quoted = 0;
832 if (parser->try_getopt && !parser->state.quoted)
833 /* Give getopt a chance to parse this. */
835 optind = parser->state.next; /* Put it back in OPTIND for getopt. */
836 optopt = KEY_END; /* Distinguish KEY_ERR from a real option. */
837 if (parser->state.flags & ARGP_LONG_ONLY)
838 opt = getopt_long_only (parser->state.argc, parser->state.argv,
839 parser->short_opts, parser->long_opts, 0);
841 opt = getopt_long (parser->state.argc, parser->state.argv,
842 parser->short_opts, parser->long_opts, 0);
843 parser->state.next = optind; /* And see what getopt did. */
846 /* Getopt says there are no more options, so stop using
847 getopt; we'll continue if necessary on our own. */
849 parser->try_getopt = 0;
850 if (parser->state.next > 1
851 && strcmp (parser->state.argv[parser->state.next - 1], QUOTE)
853 /* Not only is this the end of the options, but it's a
854 `quoted' region, which may have args that *look* like
855 options, so we definitely shouldn't try to use getopt past
856 here, whatever happens. */
857 parser->state.quoted = parser->state.next;
859 else if (opt == KEY_ERR && optopt != KEY_END)
860 /* KEY_ERR can have the same value as a valid user short
861 option, but in the case of a real error, getopt sets OPTOPT
862 to the offending character, which can never be KEY_END. */
873 /* We're past what getopt considers the options. */
874 if (parser->state.next >= parser->state.argc
875 || (parser->state.flags & ARGP_NO_ARGS))
876 /* Indicate that we're done. */
882 /* A non-option arg; simulate what getopt might have done. */
885 optarg = parser->state.argv[parser->state.next++];
890 /* A non-option argument; try each parser in turn. */
891 err = parser_parse_arg (parser, optarg);
893 err = parser_parse_opt (parser, opt, optarg);
896 *arg_ebadkey = (opt == KEY_END || opt == KEY_ARG);
901 /* Parse the options strings in ARGC & ARGV according to the argp in ARGP.
902 FLAGS is one of the ARGP_ flags above. If END_INDEX is non-NULL, the
903 index in ARGV of the first unparsed option is returned in it. If an
904 unknown option is present, EINVAL is returned; if some parser routine
905 returned a non-zero value, it is returned; otherwise 0 is returned. */
907 __argp_parse (const struct argp *argp, int argc, char **argv, unsigned flags,
908 int *end_index, void *input)
911 struct parser parser;
913 /* If true, then err == EBADKEY is a result of a non-option argument failing
914 to be parsed (which in some cases isn't actually an error). */
917 if (! (flags & ARGP_NO_HELP))
918 /* Add our own options. */
920 struct argp_child *child = alloca (4 * sizeof (struct argp_child));
921 struct argp *top_argp = alloca (sizeof (struct argp));
923 /* TOP_ARGP has no options, it just serves to group the user & default
925 memset (top_argp, 0, sizeof (*top_argp));
926 top_argp->children = child;
928 memset (child, 0, 4 * sizeof (struct argp_child));
931 (child++)->argp = argp;
932 (child++)->argp = &argp_default_argp;
933 if (argp_program_version || argp_program_version_hook)
934 (child++)->argp = &argp_version_argp;
940 /* Construct a parser for these arguments. */
941 err = parser_init (&parser, argp, argc, argv, flags, input);
947 err = parser_parse_next (&parser, &arg_ebadkey);
948 err = parser_finalize (&parser, err, arg_ebadkey, end_index);
954 weak_alias (__argp_parse, argp_parse)
957 /* Return the input field for ARGP in the parser corresponding to STATE; used
958 by the help routines. */
960 __argp_input (const struct argp *argp, const struct argp_state *state)
965 struct parser *parser = state->pstate;
967 for (group = parser->groups; group < parser->egroup; group++)
968 if (group->argp == argp)
975 weak_alias (__argp_input, _argp_input)