2 * Commandline option parsing functions
4 * Copyright (c) 2003-2008 Fabrice Bellard
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 #include "qemu/osdep.h"
28 #include "qapi/error.h"
29 #include "qemu/error-report.h"
30 #include "qapi/qmp/qbool.h"
31 #include "qapi/qmp/qdict.h"
32 #include "qapi/qmp/qnum.h"
33 #include "qapi/qmp/qstring.h"
34 #include "qapi/qmp/qerror.h"
35 #include "qemu/option_int.h"
36 #include "qemu/cutils.h"
38 #include "qemu/help_option.h"
41 * Extracts the name of an option from the parameter string (p points at the
42 * first byte of the option name)
44 * The option name is delimited by delim (usually , or =) or the string end
45 * and is copied into option. The caller is responsible for free'ing option
46 * when no longer required.
48 * The return value is the position of the delimiter/zero byte after the option
51 static const char *get_opt_name(const char *p, char **option, char delim)
53 char *offset = strchr(p, delim);
56 *option = g_strndup(p, offset - p);
59 *option = g_strdup(p);
65 * Extracts the value of an option from the parameter string p (p points at the
66 * first byte of the option value)
68 * This function is comparable to get_opt_name with the difference that the
69 * delimiter is fixed to be comma which starts a new option. To specify an
70 * option value that contains commas, double each comma.
72 const char *get_opt_value(const char *p, char **value)
74 size_t capacity = 0, length;
79 offset = qemu_strchrnul(p, ',');
81 if (*offset != '\0' && *(offset + 1) == ',') {
84 *value = g_renew(char, *value, capacity + length + 1);
85 strncpy(*value + capacity, p, length);
86 (*value)[capacity + length] = '\0';
88 if (*offset == '\0' ||
89 *(offset + 1) != ',') {
93 p += (offset - p) + 2;
99 static bool parse_option_bool(const char *name, const char *value, bool *ret,
102 if (!strcmp(value, "on")) {
104 } else if (!strcmp(value, "off")) {
107 error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
108 name, "'on' or 'off'");
114 static bool parse_option_number(const char *name, const char *value,
115 uint64_t *ret, Error **errp)
120 err = qemu_strtou64(value, NULL, 0, &number);
121 if (err == -ERANGE) {
122 error_setg(errp, "Value '%s' is too large for parameter '%s'",
127 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, "a number");
134 static const QemuOptDesc *find_desc_by_name(const QemuOptDesc *desc,
139 for (i = 0; desc[i].name != NULL; i++) {
140 if (strcmp(desc[i].name, name) == 0) {
148 static const char *find_default_by_name(QemuOpts *opts, const char *name)
150 const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name);
152 return desc ? desc->def_value_str : NULL;
155 bool parse_option_size(const char *name, const char *value,
156 uint64_t *ret, Error **errp)
161 err = qemu_strtosz(value, NULL, &size);
162 if (err == -ERANGE) {
163 error_setg(errp, "Value '%s' is out of range for parameter '%s'",
168 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name,
169 "a non-negative number below 2^64");
170 error_append_hint(errp, "Optional suffix k, M, G, T, P or E means"
171 " kilo-, mega-, giga-, tera-, peta-\n"
172 "and exabytes, respectively.\n");
179 static const char *opt_type_to_string(enum QemuOptType type)
182 case QEMU_OPT_STRING:
185 return "bool (on/off)";
186 case QEMU_OPT_NUMBER:
192 g_assert_not_reached();
196 * Print the list of options available in the given list. If
197 * @print_caption is true, a caption (including the list name, if it
198 * exists) is printed. The options itself will be indented, so
199 * @print_caption should only be set to false if the caller prints its
200 * own custom caption (so that the indentation makes sense).
202 void qemu_opts_print_help(QemuOptsList *list, bool print_caption)
206 GPtrArray *array = g_ptr_array_new();
210 while (desc && desc->name) {
211 GString *str = g_string_new(NULL);
212 g_string_append_printf(str, " %s=<%s>", desc->name,
213 opt_type_to_string(desc->type));
216 g_string_append_printf(str, "%*s", 24 - (int)str->len, "");
218 g_string_append_printf(str, " - %s", desc->help);
220 g_ptr_array_add(array, g_string_free(str, false));
224 g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0);
225 if (print_caption && array->len > 0) {
227 printf("%s options:\n", list->name);
229 printf("Options:\n");
231 } else if (array->len == 0) {
233 printf("There are no options for %s.\n", list->name);
235 printf("No options available.\n");
238 for (i = 0; i < array->len; i++) {
239 printf("%s\n", (char *)array->pdata[i]);
241 g_ptr_array_set_free_func(array, g_free);
242 g_ptr_array_free(array, true);
245 /* ------------------------------------------------------------------ */
247 QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name)
251 QTAILQ_FOREACH_REVERSE(opt, &opts->head, next) {
252 if (strcmp(opt->name, name) != 0)
259 static void qemu_opt_del(QemuOpt *opt)
261 QTAILQ_REMOVE(&opt->opts->head, opt, next);
267 /* qemu_opt_set allows many settings for the same option.
268 * This function deletes all settings for an option.
270 static void qemu_opt_del_all(QemuOpts *opts, const char *name)
272 QemuOpt *opt, *next_opt;
274 QTAILQ_FOREACH_SAFE(opt, &opts->head, next, next_opt) {
275 if (!strcmp(opt->name, name)) {
281 const char *qemu_opt_get(QemuOpts *opts, const char *name)
289 opt = qemu_opt_find(opts, name);
291 return find_default_by_name(opts, name);
297 void qemu_opt_iter_init(QemuOptsIter *iter, QemuOpts *opts, const char *name)
300 iter->opt = QTAILQ_FIRST(&opts->head);
304 const char *qemu_opt_iter_next(QemuOptsIter *iter)
306 QemuOpt *ret = iter->opt;
308 while (ret && !g_str_equal(iter->name, ret->name)) {
309 ret = QTAILQ_NEXT(ret, next);
312 iter->opt = ret ? QTAILQ_NEXT(ret, next) : NULL;
313 return ret ? ret->str : NULL;
316 /* Get a known option (or its default) and remove it from the list
317 * all in one action. Return a malloced string of the option value.
318 * Result must be freed by caller with g_free().
320 char *qemu_opt_get_del(QemuOpts *opts, const char *name)
329 opt = qemu_opt_find(opts, name);
331 return g_strdup(find_default_by_name(opts, name));
335 qemu_opt_del_all(opts, name);
339 bool qemu_opt_has_help_opt(QemuOpts *opts)
343 QTAILQ_FOREACH_REVERSE(opt, &opts->head, next) {
344 if (is_help_option(opt->name)) {
351 static bool qemu_opt_get_bool_helper(QemuOpts *opts, const char *name,
352 bool defval, bool del)
362 opt = qemu_opt_find(opts, name);
364 def_val = find_default_by_name(opts, name);
366 parse_option_bool(name, def_val, &ret, &error_abort);
370 assert(opt->desc && opt->desc->type == QEMU_OPT_BOOL);
371 ret = opt->value.boolean;
373 qemu_opt_del_all(opts, name);
378 bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval)
380 return qemu_opt_get_bool_helper(opts, name, defval, false);
383 bool qemu_opt_get_bool_del(QemuOpts *opts, const char *name, bool defval)
385 return qemu_opt_get_bool_helper(opts, name, defval, true);
388 static uint64_t qemu_opt_get_number_helper(QemuOpts *opts, const char *name,
389 uint64_t defval, bool del)
393 uint64_t ret = defval;
399 opt = qemu_opt_find(opts, name);
401 def_val = find_default_by_name(opts, name);
403 parse_option_number(name, def_val, &ret, &error_abort);
407 assert(opt->desc && opt->desc->type == QEMU_OPT_NUMBER);
408 ret = opt->value.uint;
410 qemu_opt_del_all(opts, name);
415 uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval)
417 return qemu_opt_get_number_helper(opts, name, defval, false);
420 uint64_t qemu_opt_get_number_del(QemuOpts *opts, const char *name,
423 return qemu_opt_get_number_helper(opts, name, defval, true);
426 static uint64_t qemu_opt_get_size_helper(QemuOpts *opts, const char *name,
427 uint64_t defval, bool del)
431 uint64_t ret = defval;
437 opt = qemu_opt_find(opts, name);
439 def_val = find_default_by_name(opts, name);
441 parse_option_size(name, def_val, &ret, &error_abort);
445 assert(opt->desc && opt->desc->type == QEMU_OPT_SIZE);
446 ret = opt->value.uint;
448 qemu_opt_del_all(opts, name);
453 uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval)
455 return qemu_opt_get_size_helper(opts, name, defval, false);
458 uint64_t qemu_opt_get_size_del(QemuOpts *opts, const char *name,
461 return qemu_opt_get_size_helper(opts, name, defval, true);
464 static bool qemu_opt_parse(QemuOpt *opt, Error **errp)
466 if (opt->desc == NULL)
469 switch (opt->desc->type) {
470 case QEMU_OPT_STRING:
474 return parse_option_bool(opt->name, opt->str, &opt->value.boolean,
476 case QEMU_OPT_NUMBER:
477 return parse_option_number(opt->name, opt->str, &opt->value.uint,
480 return parse_option_size(opt->name, opt->str, &opt->value.uint,
487 static bool opts_accepts_any(const QemuOpts *opts)
489 return opts->list->desc[0].name == NULL;
492 int qemu_opt_unset(QemuOpts *opts, const char *name)
494 QemuOpt *opt = qemu_opt_find(opts, name);
496 assert(opts_accepts_any(opts));
506 static QemuOpt *opt_create(QemuOpts *opts, const char *name, char *value,
509 QemuOpt *opt = g_malloc0(sizeof(*opt));
511 opt->name = g_strdup(name);
515 QTAILQ_INSERT_HEAD(&opts->head, opt, next);
517 QTAILQ_INSERT_TAIL(&opts->head, opt, next);
523 static bool opt_validate(QemuOpt *opt, bool *help_wanted,
526 const QemuOptDesc *desc;
528 desc = find_desc_by_name(opt->opts->list->desc, opt->name);
529 if (!desc && !opts_accepts_any(opt->opts)) {
530 error_setg(errp, QERR_INVALID_PARAMETER, opt->name);
531 if (help_wanted && is_help_option(opt->name)) {
538 if (!qemu_opt_parse(opt, errp)) {
545 bool qemu_opt_set(QemuOpts *opts, const char *name, const char *value,
548 QemuOpt *opt = opt_create(opts, name, g_strdup(value), false);
550 if (!opt_validate(opt, NULL, errp)) {
557 bool qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val,
561 const QemuOptDesc *desc;
563 desc = find_desc_by_name(opts->list->desc, name);
564 if (!desc && !opts_accepts_any(opts)) {
565 error_setg(errp, QERR_INVALID_PARAMETER, name);
569 opt = g_malloc0(sizeof(*opt));
570 opt->name = g_strdup(name);
573 opt->value.boolean = !!val;
574 opt->str = g_strdup(val ? "on" : "off");
575 QTAILQ_INSERT_TAIL(&opts->head, opt, next);
579 bool qemu_opt_set_number(QemuOpts *opts, const char *name, int64_t val,
583 const QemuOptDesc *desc;
585 desc = find_desc_by_name(opts->list->desc, name);
586 if (!desc && !opts_accepts_any(opts)) {
587 error_setg(errp, QERR_INVALID_PARAMETER, name);
591 opt = g_malloc0(sizeof(*opt));
592 opt->name = g_strdup(name);
595 opt->value.uint = val;
596 opt->str = g_strdup_printf("%" PRId64, val);
597 QTAILQ_INSERT_TAIL(&opts->head, opt, next);
602 * For each member of @opts, call @func(@opaque, name, value, @errp).
603 * @func() may store an Error through @errp, but must return non-zero then.
604 * When @func() returns non-zero, break the loop and return that value.
605 * Return zero when the loop completes.
607 int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque,
613 QTAILQ_FOREACH(opt, &opts->head, next) {
614 rc = func(opaque, opt->name, opt->str, errp);
618 assert(!errp || !*errp);
623 QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id)
627 QTAILQ_FOREACH(opts, &list->head, next) {
628 if (!opts->id && !id) {
631 if (opts->id && id && !strcmp(opts->id, id)) {
638 QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id,
639 int fail_if_exists, Error **errp)
641 QemuOpts *opts = NULL;
644 if (!id_wellformed(id)) {
645 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "id",
647 error_append_hint(errp, "Identifiers consist of letters, digits, "
648 "'-', '.', '_', starting with a letter.\n");
651 opts = qemu_opts_find(list, id);
653 if (fail_if_exists && !list->merge_lists) {
654 error_setg(errp, "Duplicate ID '%s' for %s", id, list->name);
660 } else if (list->merge_lists) {
661 opts = qemu_opts_find(list, NULL);
666 opts = g_malloc0(sizeof(*opts));
667 opts->id = g_strdup(id);
669 loc_save(&opts->loc);
670 QTAILQ_INIT(&opts->head);
671 QTAILQ_INSERT_TAIL(&list->head, opts, next);
675 void qemu_opts_reset(QemuOptsList *list)
677 QemuOpts *opts, *next_opts;
679 QTAILQ_FOREACH_SAFE(opts, &list->head, next, next_opts) {
684 void qemu_opts_loc_restore(QemuOpts *opts)
686 loc_restore(&opts->loc);
689 bool qemu_opts_set(QemuOptsList *list, const char *id,
690 const char *name, const char *value, Error **errp)
694 opts = qemu_opts_create(list, id, 1, errp);
698 return qemu_opt_set(opts, name, value, errp);
701 const char *qemu_opts_id(QemuOpts *opts)
706 /* The id string will be g_free()d by qemu_opts_del */
707 void qemu_opts_set_id(QemuOpts *opts, char *id)
712 void qemu_opts_del(QemuOpts *opts)
721 opt = QTAILQ_FIRST(&opts->head);
726 QTAILQ_REMOVE(&opts->list->head, opts, next);
731 /* print value, escaping any commas in value */
732 static void escaped_print(const char *value)
736 for (ptr = value; *ptr; ++ptr) {
744 void qemu_opts_print(QemuOpts *opts, const char *separator)
747 QemuOptDesc *desc = opts->list->desc;
748 const char *sep = "";
751 printf("id=%s", opts->id); /* passed id_wellformed -> no commas */
755 if (desc[0].name == NULL) {
756 QTAILQ_FOREACH(opt, &opts->head, next) {
757 printf("%s%s=", sep, opt->name);
758 escaped_print(opt->str);
763 for (; desc && desc->name; desc++) {
765 opt = qemu_opt_find(opts, desc->name);
767 value = opt ? opt->str : desc->def_value_str;
771 if (desc->type == QEMU_OPT_STRING) {
772 printf("%s%s=", sep, desc->name);
773 escaped_print(value);
774 } else if ((desc->type == QEMU_OPT_SIZE ||
775 desc->type == QEMU_OPT_NUMBER) && opt) {
776 printf("%s%s=%" PRId64, sep, desc->name, opt->value.uint);
778 printf("%s%s=%s", sep, desc->name, value);
784 static const char *get_opt_name_value(const char *params,
785 const char *firstname,
786 char **name, char **value)
788 const char *p, *pe, *pc;
790 pe = strchr(params, '=');
791 pc = strchr(params, ',');
793 if (!pe || (pc && pc < pe)) {
794 /* found "foo,more" */
796 /* implicitly named first option */
797 *name = g_strdup(firstname);
798 p = get_opt_value(params, value);
800 /* option without value, must be a flag */
801 p = get_opt_name(params, name, ',');
802 if (strncmp(*name, "no", 2) == 0) {
803 memmove(*name, *name + 2, strlen(*name + 2) + 1);
804 *value = g_strdup("off");
806 *value = g_strdup("on");
810 /* found "foo=bar,more" */
811 p = get_opt_name(params, name, '=');
814 p = get_opt_value(p, value);
817 assert(!*p || *p == ',');
824 static bool opts_do_parse(QemuOpts *opts, const char *params,
825 const char *firstname, bool prepend,
826 bool *help_wanted, Error **errp)
828 char *option, *value;
832 for (p = params; *p;) {
833 p = get_opt_name_value(p, firstname, &option, &value);
836 if (!strcmp(option, "id")) {
842 opt = opt_create(opts, option, value, prepend);
844 if (!opt_validate(opt, help_wanted, errp)) {
853 static char *opts_parse_id(const char *params)
858 for (p = params; *p;) {
859 p = get_opt_name_value(p, NULL, &name, &value);
860 if (!strcmp(name, "id")) {
871 bool has_help_option(const char *params)
877 for (p = params; *p;) {
878 p = get_opt_name_value(p, NULL, &name, &value);
879 ret = is_help_option(name);
891 * Store options parsed from @params into @opts.
892 * If @firstname is non-null, the first key=value in @params may omit
893 * key=, and is treated as if key was @firstname.
894 * On error, store an error object through @errp if non-null.
896 bool qemu_opts_do_parse(QemuOpts *opts, const char *params,
897 const char *firstname, Error **errp)
899 return opts_do_parse(opts, params, firstname, false, NULL, errp);
902 static QemuOpts *opts_parse(QemuOptsList *list, const char *params,
903 bool permit_abbrev, bool defaults,
904 bool *help_wanted, Error **errp)
906 const char *firstname;
907 char *id = opts_parse_id(params);
910 assert(!permit_abbrev || list->implied_opt_name);
911 firstname = permit_abbrev ? list->implied_opt_name : NULL;
914 * This code doesn't work for defaults && !list->merge_lists: when
915 * params has no id=, and list has an element with !opts->id, it
916 * appends a new element instead of returning the existing opts.
917 * However, we got no use for this case. Guard against possible
918 * (if unlikely) future misuse:
920 assert(!defaults || list->merge_lists);
921 opts = qemu_opts_create(list, id, !defaults, errp);
927 if (!opts_do_parse(opts, params, firstname, defaults, help_wanted,
937 * Create a QemuOpts in @list and with options parsed from @params.
938 * If @permit_abbrev, the first key=value in @params may omit key=,
939 * and is treated as if key was @list->implied_opt_name.
940 * On error, store an error object through @errp if non-null.
941 * Return the new QemuOpts on success, null pointer on error.
943 QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params,
944 bool permit_abbrev, Error **errp)
946 return opts_parse(list, params, permit_abbrev, false, NULL, errp);
950 * Create a QemuOpts in @list and with options parsed from @params.
951 * If @permit_abbrev, the first key=value in @params may omit key=,
952 * and is treated as if key was @list->implied_opt_name.
953 * Report errors with error_report_err(). This is inappropriate in
954 * QMP context. Do not use this function there!
955 * Return the new QemuOpts on success, null pointer on error.
957 QemuOpts *qemu_opts_parse_noisily(QemuOptsList *list, const char *params,
962 bool help_wanted = false;
964 opts = opts_parse(list, params, permit_abbrev, false, &help_wanted, &err);
967 qemu_opts_print_help(list, true);
970 error_report_err(err);
976 void qemu_opts_set_defaults(QemuOptsList *list, const char *params,
981 opts = opts_parse(list, params, permit_abbrev, true, NULL, NULL);
985 static bool qemu_opts_from_qdict_entry(QemuOpts *opts,
986 const QDictEntry *entry,
989 const char *key = qdict_entry_key(entry);
990 QObject *obj = qdict_entry_value(entry);
992 g_autofree char *tmp = NULL;
995 if (!strcmp(key, "id")) {
999 switch (qobject_type(obj)) {
1001 value = qstring_get_str(qobject_to(QString, obj));
1004 tmp = qnum_to_string(qobject_to(QNum, obj));
1008 pstrcpy(buf, sizeof(buf),
1009 qbool_get_bool(qobject_to(QBool, obj)) ? "on" : "off");
1016 return qemu_opt_set(opts, key, value, errp);
1020 * Create QemuOpts from a QDict.
1021 * Use value of key "id" as ID if it exists and is a QString. Only
1022 * QStrings, QNums and QBools are copied. Entries with other types
1023 * are silently ignored.
1025 QemuOpts *qemu_opts_from_qdict(QemuOptsList *list, const QDict *qdict,
1029 const QDictEntry *entry;
1031 opts = qemu_opts_create(list, qdict_get_try_str(qdict, "id"), 1, errp);
1036 assert(opts != NULL);
1038 for (entry = qdict_first(qdict);
1040 entry = qdict_next(qdict, entry)) {
1041 if (!qemu_opts_from_qdict_entry(opts, entry, errp)) {
1042 qemu_opts_del(opts);
1051 * Adds all QDict entries to the QemuOpts that can be added and removes them
1052 * from the QDict. When this function returns, the QDict contains only those
1053 * entries that couldn't be added to the QemuOpts.
1055 bool qemu_opts_absorb_qdict(QemuOpts *opts, QDict *qdict, Error **errp)
1057 const QDictEntry *entry, *next;
1059 entry = qdict_first(qdict);
1061 while (entry != NULL) {
1062 next = qdict_next(qdict, entry);
1064 if (find_desc_by_name(opts->list->desc, entry->key)) {
1065 if (!qemu_opts_from_qdict_entry(opts, entry, errp)) {
1068 qdict_del(qdict, entry->key);
1078 * Convert from QemuOpts to QDict. The QDict values are of type QString.
1080 * If @list is given, only add those options to the QDict that are contained in
1081 * the list. If @del is true, any options added to the QDict are removed from
1082 * the QemuOpts, otherwise they remain there.
1084 * If two options in @opts have the same name, they are processed in order
1085 * so that the last one wins (consistent with the reverse iteration in
1086 * qemu_opt_find()), but all of them are deleted if @del is true.
1088 * TODO We'll want to use types appropriate for opt->desc->type, but
1089 * this is enough for now.
1091 QDict *qemu_opts_to_qdict_filtered(QemuOpts *opts, QDict *qdict,
1092 QemuOptsList *list, bool del)
1094 QemuOpt *opt, *next;
1097 qdict = qdict_new();
1100 qdict_put_str(qdict, "id", opts->id);
1102 QTAILQ_FOREACH_SAFE(opt, &opts->head, next, next) {
1106 for (desc = list->desc; desc->name; desc++) {
1107 if (!strcmp(desc->name, opt->name)) {
1116 qdict_put_str(qdict, opt->name, opt->str);
1124 /* Copy all options in a QemuOpts to the given QDict. See
1125 * qemu_opts_to_qdict_filtered() for details. */
1126 QDict *qemu_opts_to_qdict(QemuOpts *opts, QDict *qdict)
1128 return qemu_opts_to_qdict_filtered(opts, qdict, NULL, false);
1131 /* Validate parsed opts against descriptions where no
1132 * descriptions were provided in the QemuOptsList.
1134 bool qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc, Error **errp)
1138 assert(opts_accepts_any(opts));
1140 QTAILQ_FOREACH(opt, &opts->head, next) {
1141 opt->desc = find_desc_by_name(desc, opt->name);
1143 error_setg(errp, QERR_INVALID_PARAMETER, opt->name);
1147 if (!qemu_opt_parse(opt, errp)) {
1156 * For each member of @list, call @func(@opaque, member, @errp).
1157 * Call it with the current location temporarily set to the member's.
1158 * @func() may store an Error through @errp, but must return non-zero then.
1159 * When @func() returns non-zero, break the loop and return that value.
1160 * Return zero when the loop completes.
1162 int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func,
1163 void *opaque, Error **errp)
1169 loc_push_none(&loc);
1170 QTAILQ_FOREACH(opts, &list->head, next) {
1171 loc_restore(&opts->loc);
1172 rc = func(opaque, opts, errp);
1176 assert(!errp || !*errp);
1182 static size_t count_opts_list(QemuOptsList *list)
1184 QemuOptDesc *desc = NULL;
1185 size_t num_opts = 0;
1192 while (desc && desc->name) {
1200 void qemu_opts_free(QemuOptsList *list)
1205 /* Realloc dst option list and append options from an option list (list)
1206 * to it. dst could be NULL or a malloced list.
1207 * The lifetime of dst must be shorter than the input list because the
1208 * QemuOptDesc->name, ->help, and ->def_value_str strings are shared.
1210 QemuOptsList *qemu_opts_append(QemuOptsList *dst,
1213 size_t num_opts, num_dst_opts;
1215 bool need_init = false;
1216 bool need_head_update;
1222 /* If dst is NULL, after realloc, some area of dst should be initialized
1223 * before adding options to it.
1227 need_head_update = true;
1229 /* Moreover, even if dst is not NULL, the realloc may move it to a
1230 * different address in which case we may get a stale tail pointer
1232 need_head_update = QTAILQ_EMPTY(&dst->head);
1235 num_opts = count_opts_list(dst);
1236 num_dst_opts = num_opts;
1237 num_opts += count_opts_list(list);
1238 dst = g_realloc(dst, sizeof(QemuOptsList) +
1239 (num_opts + 1) * sizeof(QemuOptDesc));
1242 dst->implied_opt_name = NULL;
1243 dst->merge_lists = false;
1245 if (need_head_update) {
1246 QTAILQ_INIT(&dst->head);
1248 dst->desc[num_dst_opts].name = NULL;
1250 /* append list->desc to dst->desc */
1253 while (desc && desc->name) {
1254 if (find_desc_by_name(dst->desc, desc->name) == NULL) {
1255 dst->desc[num_dst_opts++] = *desc;
1256 dst->desc[num_dst_opts].name = NULL;