2 * Commandline option parsing functions
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2009 Kevin Wolf <kwolf@redhat.com>
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
29 #include "qemu-common.h"
30 #include "qemu/error-report.h"
31 #include "qapi/qmp/types.h"
32 #include "qapi/error.h"
33 #include "qapi/qmp/qerror.h"
34 #include "qemu/option_int.h"
37 * Extracts the name of an option from the parameter string (p points at the
38 * first byte of the option name)
40 * The option name is delimited by delim (usually , or =) or the string end
41 * and is copied into buf. If the option name is longer than buf_size, it is
42 * truncated. buf is always zero terminated.
44 * The return value is the position of the delimiter/zero byte after the option
47 const char *get_opt_name(char *buf
, int buf_size
, const char *p
, char delim
)
52 while (*p
!= '\0' && *p
!= delim
) {
53 if (q
&& (q
- buf
) < buf_size
- 1)
64 * Extracts the value of an option from the parameter string p (p points at the
65 * first byte of the option value)
67 * This function is comparable to get_opt_name with the difference that the
68 * delimiter is fixed to be comma which starts a new option. To specify an
69 * option value that contains commas, double each comma.
71 const char *get_opt_value(char *buf
, int buf_size
, const char *p
)
82 if (q
&& (q
- buf
) < buf_size
- 1)
92 int get_next_param_value(char *buf
, int buf_size
,
93 const char *tag
, const char **pstr
)
100 p
= get_opt_name(option
, sizeof(option
), p
, '=');
104 if (!strcmp(tag
, option
)) {
105 *pstr
= get_opt_value(buf
, buf_size
, p
);
111 p
= get_opt_value(NULL
, 0, p
);
120 int get_param_value(char *buf
, int buf_size
,
121 const char *tag
, const char *str
)
123 return get_next_param_value(buf
, buf_size
, tag
, &str
);
126 static void parse_option_bool(const char *name
, const char *value
, bool *ret
,
130 if (!strcmp(value
, "on")) {
132 } else if (!strcmp(value
, "off")) {
135 error_set(errp
,QERR_INVALID_PARAMETER_VALUE
, name
, "'on' or 'off'");
142 static void parse_option_number(const char *name
, const char *value
,
143 uint64_t *ret
, Error
**errp
)
149 number
= strtoull(value
, &postfix
, 0);
150 if (*postfix
!= '\0') {
151 error_set(errp
, QERR_INVALID_PARAMETER_VALUE
, name
, "a number");
156 error_set(errp
, QERR_INVALID_PARAMETER_VALUE
, name
, "a number");
160 static const QemuOptDesc
*find_desc_by_name(const QemuOptDesc
*desc
,
165 for (i
= 0; desc
[i
].name
!= NULL
; i
++) {
166 if (strcmp(desc
[i
].name
, name
) == 0) {
174 void parse_option_size(const char *name
, const char *value
,
175 uint64_t *ret
, Error
**errp
)
181 sizef
= strtod(value
, &postfix
);
198 *ret
= (uint64_t) sizef
;
201 error_set(errp
, QERR_INVALID_PARAMETER_VALUE
, name
, "a size");
202 #if 0 /* conversion from qerror_report() to error_set() broke this: */
203 error_printf_unless_qmp("You may use k, M, G or T suffixes for "
204 "kilobytes, megabytes, gigabytes and terabytes.\n");
209 error_set(errp
, QERR_INVALID_PARAMETER_VALUE
, name
, "a size");
213 bool has_help_option(const char *param
)
215 size_t buflen
= strlen(param
) + 1;
216 char *buf
= g_malloc(buflen
);
217 const char *p
= param
;
221 p
= get_opt_value(buf
, buflen
, p
);
226 if (is_help_option(buf
)) {
237 bool is_valid_option_list(const char *param
)
239 size_t buflen
= strlen(param
) + 1;
240 char *buf
= g_malloc(buflen
);
241 const char *p
= param
;
245 p
= get_opt_value(buf
, buflen
, p
);
251 if (!*buf
|| *buf
== ',') {
262 void qemu_opts_print_help(QemuOptsList
*list
)
268 printf("Supported options:\n");
269 while (desc
&& desc
->name
) {
270 printf("%-16s %s\n", desc
->name
,
271 desc
->help
? desc
->help
: "No description available");
275 /* ------------------------------------------------------------------ */
277 QemuOpt
*qemu_opt_find(QemuOpts
*opts
, const char *name
)
281 QTAILQ_FOREACH_REVERSE(opt
, &opts
->head
, QemuOptHead
, next
) {
282 if (strcmp(opt
->name
, name
) != 0)
289 static void qemu_opt_del(QemuOpt
*opt
)
291 QTAILQ_REMOVE(&opt
->opts
->head
, opt
, next
);
297 /* qemu_opt_set allows many settings for the same option.
298 * This function deletes all settings for an option.
300 static void qemu_opt_del_all(QemuOpts
*opts
, const char *name
)
302 QemuOpt
*opt
, *next_opt
;
304 QTAILQ_FOREACH_SAFE(opt
, &opts
->head
, next
, next_opt
) {
305 if (!strcmp(opt
->name
, name
)) {
311 const char *qemu_opt_get(QemuOpts
*opts
, const char *name
)
319 opt
= qemu_opt_find(opts
, name
);
321 const QemuOptDesc
*desc
= find_desc_by_name(opts
->list
->desc
, name
);
322 if (desc
&& desc
->def_value_str
) {
323 return desc
->def_value_str
;
326 return opt
? opt
->str
: NULL
;
329 /* Get a known option (or its default) and remove it from the list
330 * all in one action. Return a malloced string of the option value.
331 * Result must be freed by caller with g_free().
333 char *qemu_opt_get_del(QemuOpts
*opts
, const char *name
)
336 const QemuOptDesc
*desc
;
343 opt
= qemu_opt_find(opts
, name
);
345 desc
= find_desc_by_name(opts
->list
->desc
, name
);
346 if (desc
&& desc
->def_value_str
) {
347 str
= g_strdup(desc
->def_value_str
);
353 qemu_opt_del_all(opts
, name
);
357 bool qemu_opt_has_help_opt(QemuOpts
*opts
)
361 QTAILQ_FOREACH_REVERSE(opt
, &opts
->head
, QemuOptHead
, next
) {
362 if (is_help_option(opt
->name
)) {
369 static bool qemu_opt_get_bool_helper(QemuOpts
*opts
, const char *name
,
370 bool defval
, bool del
)
379 opt
= qemu_opt_find(opts
, name
);
381 const QemuOptDesc
*desc
= find_desc_by_name(opts
->list
->desc
, name
);
382 if (desc
&& desc
->def_value_str
) {
383 parse_option_bool(name
, desc
->def_value_str
, &ret
, &error_abort
);
387 assert(opt
->desc
&& opt
->desc
->type
== QEMU_OPT_BOOL
);
388 ret
= opt
->value
.boolean
;
390 qemu_opt_del_all(opts
, name
);
395 bool qemu_opt_get_bool(QemuOpts
*opts
, const char *name
, bool defval
)
397 return qemu_opt_get_bool_helper(opts
, name
, defval
, false);
400 bool qemu_opt_get_bool_del(QemuOpts
*opts
, const char *name
, bool defval
)
402 return qemu_opt_get_bool_helper(opts
, name
, defval
, true);
405 static uint64_t qemu_opt_get_number_helper(QemuOpts
*opts
, const char *name
,
406 uint64_t defval
, bool del
)
409 uint64_t ret
= defval
;
415 opt
= qemu_opt_find(opts
, name
);
417 const QemuOptDesc
*desc
= find_desc_by_name(opts
->list
->desc
, name
);
418 if (desc
&& desc
->def_value_str
) {
419 parse_option_number(name
, desc
->def_value_str
, &ret
, &error_abort
);
423 assert(opt
->desc
&& opt
->desc
->type
== QEMU_OPT_NUMBER
);
424 ret
= opt
->value
.uint
;
426 qemu_opt_del_all(opts
, name
);
431 uint64_t qemu_opt_get_number(QemuOpts
*opts
, const char *name
, uint64_t defval
)
433 return qemu_opt_get_number_helper(opts
, name
, defval
, false);
436 uint64_t qemu_opt_get_number_del(QemuOpts
*opts
, const char *name
,
439 return qemu_opt_get_number_helper(opts
, name
, defval
, true);
442 static uint64_t qemu_opt_get_size_helper(QemuOpts
*opts
, const char *name
,
443 uint64_t defval
, bool del
)
446 uint64_t ret
= defval
;
452 opt
= qemu_opt_find(opts
, name
);
454 const QemuOptDesc
*desc
= find_desc_by_name(opts
->list
->desc
, name
);
455 if (desc
&& desc
->def_value_str
) {
456 parse_option_size(name
, desc
->def_value_str
, &ret
, &error_abort
);
460 assert(opt
->desc
&& opt
->desc
->type
== QEMU_OPT_SIZE
);
461 ret
= opt
->value
.uint
;
463 qemu_opt_del_all(opts
, name
);
468 uint64_t qemu_opt_get_size(QemuOpts
*opts
, const char *name
, uint64_t defval
)
470 return qemu_opt_get_size_helper(opts
, name
, defval
, false);
473 uint64_t qemu_opt_get_size_del(QemuOpts
*opts
, const char *name
,
476 return qemu_opt_get_size_helper(opts
, name
, defval
, true);
479 static void qemu_opt_parse(QemuOpt
*opt
, Error
**errp
)
481 if (opt
->desc
== NULL
)
484 switch (opt
->desc
->type
) {
485 case QEMU_OPT_STRING
:
489 parse_option_bool(opt
->name
, opt
->str
, &opt
->value
.boolean
, errp
);
491 case QEMU_OPT_NUMBER
:
492 parse_option_number(opt
->name
, opt
->str
, &opt
->value
.uint
, errp
);
495 parse_option_size(opt
->name
, opt
->str
, &opt
->value
.uint
, errp
);
502 static bool opts_accepts_any(const QemuOpts
*opts
)
504 return opts
->list
->desc
[0].name
== NULL
;
507 int qemu_opt_unset(QemuOpts
*opts
, const char *name
)
509 QemuOpt
*opt
= qemu_opt_find(opts
, name
);
511 assert(opts_accepts_any(opts
));
521 static void opt_set(QemuOpts
*opts
, const char *name
, const char *value
,
522 bool prepend
, Error
**errp
)
525 const QemuOptDesc
*desc
;
526 Error
*local_err
= NULL
;
528 desc
= find_desc_by_name(opts
->list
->desc
, name
);
529 if (!desc
&& !opts_accepts_any(opts
)) {
530 error_set(errp
, QERR_INVALID_PARAMETER
, name
);
534 opt
= g_malloc0(sizeof(*opt
));
535 opt
->name
= g_strdup(name
);
538 QTAILQ_INSERT_HEAD(&opts
->head
, opt
, next
);
540 QTAILQ_INSERT_TAIL(&opts
->head
, opt
, next
);
543 opt
->str
= g_strdup(value
);
544 qemu_opt_parse(opt
, &local_err
);
546 error_propagate(errp
, local_err
);
551 void qemu_opt_set(QemuOpts
*opts
, const char *name
, const char *value
,
554 opt_set(opts
, name
, value
, false, errp
);
557 void qemu_opt_set_bool(QemuOpts
*opts
, const char *name
, bool val
,
561 const QemuOptDesc
*desc
= opts
->list
->desc
;
563 opt
= g_malloc0(sizeof(*opt
));
564 opt
->desc
= find_desc_by_name(desc
, name
);
565 if (!opt
->desc
&& !opts_accepts_any(opts
)) {
566 error_set(errp
, QERR_INVALID_PARAMETER
, name
);
571 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
);
578 void qemu_opt_set_number(QemuOpts
*opts
, const char *name
, int64_t val
,
582 const QemuOptDesc
*desc
= opts
->list
->desc
;
584 opt
= g_malloc0(sizeof(*opt
));
585 opt
->desc
= find_desc_by_name(desc
, name
);
586 if (!opt
->desc
&& !opts_accepts_any(opts
)) {
587 error_set(errp
, QERR_INVALID_PARAMETER
, name
);
592 opt
->name
= g_strdup(name
);
594 opt
->value
.uint
= val
;
595 opt
->str
= g_strdup_printf("%" PRId64
, val
);
596 QTAILQ_INSERT_TAIL(&opts
->head
, opt
, next
);
600 * For each member of @opts, call @func(@opaque, name, value, @errp).
601 * @func() may store an Error through @errp, but must return non-zero then.
602 * When @func() returns non-zero, break the loop and return that value.
603 * Return zero when the loop completes.
605 int qemu_opt_foreach(QemuOpts
*opts
, qemu_opt_loopfunc func
, void *opaque
,
611 QTAILQ_FOREACH(opt
, &opts
->head
, next
) {
612 rc
= func(opaque
, opt
->name
, opt
->str
, errp
);
616 assert(!errp
|| !*errp
);
621 QemuOpts
*qemu_opts_find(QemuOptsList
*list
, const char *id
)
625 QTAILQ_FOREACH(opts
, &list
->head
, next
) {
626 if (!opts
->id
&& !id
) {
629 if (opts
->id
&& id
&& !strcmp(opts
->id
, id
)) {
636 QemuOpts
*qemu_opts_create(QemuOptsList
*list
, const char *id
,
637 int fail_if_exists
, Error
**errp
)
639 QemuOpts
*opts
= NULL
;
642 if (!id_wellformed(id
)) {
643 error_set(errp
,QERR_INVALID_PARAMETER_VALUE
, "id", "an identifier");
644 #if 0 /* conversion from qerror_report() to error_set() broke this: */
645 error_printf_unless_qmp("Identifiers consist of letters, digits, '-', '.', '_', starting with a letter.\n");
649 opts
= qemu_opts_find(list
, id
);
651 if (fail_if_exists
&& !list
->merge_lists
) {
652 error_setg(errp
, "Duplicate ID '%s' for %s", id
, list
->name
);
658 } else if (list
->merge_lists
) {
659 opts
= qemu_opts_find(list
, NULL
);
664 opts
= g_malloc0(sizeof(*opts
));
665 opts
->id
= g_strdup(id
);
667 loc_save(&opts
->loc
);
668 QTAILQ_INIT(&opts
->head
);
669 QTAILQ_INSERT_TAIL(&list
->head
, opts
, next
);
673 void qemu_opts_reset(QemuOptsList
*list
)
675 QemuOpts
*opts
, *next_opts
;
677 QTAILQ_FOREACH_SAFE(opts
, &list
->head
, next
, next_opts
) {
682 void qemu_opts_loc_restore(QemuOpts
*opts
)
684 loc_restore(&opts
->loc
);
687 void qemu_opts_set(QemuOptsList
*list
, const char *id
,
688 const char *name
, const char *value
, Error
**errp
)
691 Error
*local_err
= NULL
;
693 opts
= qemu_opts_create(list
, id
, 1, &local_err
);
695 error_propagate(errp
, local_err
);
698 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 void qemu_opts_print(QemuOpts
*opts
, const char *sep
)
734 QemuOptDesc
*desc
= opts
->list
->desc
;
736 if (desc
[0].name
== NULL
) {
737 QTAILQ_FOREACH(opt
, &opts
->head
, next
) {
738 printf("%s%s=\"%s\"", sep
, opt
->name
, opt
->str
);
742 for (; desc
&& desc
->name
; desc
++) {
744 QemuOpt
*opt
= qemu_opt_find(opts
, desc
->name
);
746 value
= opt
? opt
->str
: desc
->def_value_str
;
750 if (desc
->type
== QEMU_OPT_STRING
) {
751 printf("%s%s='%s'", sep
, desc
->name
, value
);
752 } else if ((desc
->type
== QEMU_OPT_SIZE
||
753 desc
->type
== QEMU_OPT_NUMBER
) && opt
) {
754 printf("%s%s=%" PRId64
, sep
, desc
->name
, opt
->value
.uint
);
756 printf("%s%s=%s", sep
, desc
->name
, value
);
761 static void opts_do_parse(QemuOpts
*opts
, const char *params
,
762 const char *firstname
, bool prepend
, Error
**errp
)
764 char option
[128], value
[1024];
765 const char *p
,*pe
,*pc
;
766 Error
*local_err
= NULL
;
768 for (p
= params
; *p
!= '\0'; p
++) {
771 if (!pe
|| (pc
&& pc
< pe
)) {
772 /* found "foo,more" */
773 if (p
== params
&& firstname
) {
774 /* implicitly named first option */
775 pstrcpy(option
, sizeof(option
), firstname
);
776 p
= get_opt_value(value
, sizeof(value
), p
);
778 /* option without value, probably a flag */
779 p
= get_opt_name(option
, sizeof(option
), p
, ',');
780 if (strncmp(option
, "no", 2) == 0) {
781 memmove(option
, option
+2, strlen(option
+2)+1);
782 pstrcpy(value
, sizeof(value
), "off");
784 pstrcpy(value
, sizeof(value
), "on");
788 /* found "foo=bar,more" */
789 p
= get_opt_name(option
, sizeof(option
), p
, '=');
794 p
= get_opt_value(value
, sizeof(value
), p
);
796 if (strcmp(option
, "id") != 0) {
797 /* store and parse */
798 opt_set(opts
, option
, value
, prepend
, &local_err
);
800 error_propagate(errp
, local_err
);
811 * Store options parsed from @params into @opts.
812 * If @firstname is non-null, the first key=value in @params may omit
813 * key=, and is treated as if key was @firstname.
814 * On error, store an error object through @errp if non-null.
816 void qemu_opts_do_parse(QemuOpts
*opts
, const char *params
,
817 const char *firstname
, Error
**errp
)
819 opts_do_parse(opts
, params
, firstname
, false, errp
);
822 static QemuOpts
*opts_parse(QemuOptsList
*list
, const char *params
,
823 int permit_abbrev
, bool defaults
, Error
**errp
)
825 const char *firstname
;
826 char value
[1024], *id
= NULL
;
829 Error
*local_err
= NULL
;
831 assert(!permit_abbrev
|| list
->implied_opt_name
);
832 firstname
= permit_abbrev
? list
->implied_opt_name
: NULL
;
834 if (strncmp(params
, "id=", 3) == 0) {
835 get_opt_value(value
, sizeof(value
), params
+3);
837 } else if ((p
= strstr(params
, ",id=")) != NULL
) {
838 get_opt_value(value
, sizeof(value
), p
+4);
843 * This code doesn't work for defaults && !list->merge_lists: when
844 * params has no id=, and list has an element with !opts->id, it
845 * appends a new element instead of returning the existing opts.
846 * However, we got no use for this case. Guard against possible
847 * (if unlikely) future misuse:
849 assert(!defaults
|| list
->merge_lists
);
850 opts
= qemu_opts_create(list
, id
, !defaults
, &local_err
);
852 error_propagate(errp
, local_err
);
856 opts_do_parse(opts
, params
, firstname
, defaults
, &local_err
);
858 error_propagate(errp
, local_err
);
867 * Create a QemuOpts in @list and with options parsed from @params.
868 * If @permit_abbrev, the first key=value in @params may omit key=,
869 * and is treated as if key was @list->implied_opt_name.
870 * Report errors with qerror_report_err().
871 * Return the new QemuOpts on success, null pointer on error.
873 QemuOpts
*qemu_opts_parse(QemuOptsList
*list
, const char *params
,
879 opts
= opts_parse(list
, params
, permit_abbrev
, false, &err
);
881 qerror_report_err(err
);
887 void qemu_opts_set_defaults(QemuOptsList
*list
, const char *params
,
892 opts
= opts_parse(list
, params
, permit_abbrev
, true, NULL
);
896 typedef struct OptsFromQDictState
{
899 } OptsFromQDictState
;
901 static void qemu_opts_from_qdict_1(const char *key
, QObject
*obj
, void *opaque
)
903 OptsFromQDictState
*state
= opaque
;
908 if (!strcmp(key
, "id") || *state
->errp
) {
912 switch (qobject_type(obj
)) {
914 value
= qstring_get_str(qobject_to_qstring(obj
));
917 n
= snprintf(buf
, sizeof(buf
), "%" PRId64
,
918 qint_get_int(qobject_to_qint(obj
)));
919 assert(n
< sizeof(buf
));
923 n
= snprintf(buf
, sizeof(buf
), "%.17g",
924 qfloat_get_double(qobject_to_qfloat(obj
)));
925 assert(n
< sizeof(buf
));
929 pstrcpy(buf
, sizeof(buf
),
930 qbool_get_int(qobject_to_qbool(obj
)) ? "on" : "off");
937 qemu_opt_set(state
->opts
, key
, value
, state
->errp
);
941 * Create QemuOpts from a QDict.
942 * Use value of key "id" as ID if it exists and is a QString.
943 * Only QStrings, QInts, QFloats and QBools are copied. Entries with
944 * other types are silently ignored.
946 QemuOpts
*qemu_opts_from_qdict(QemuOptsList
*list
, const QDict
*qdict
,
949 OptsFromQDictState state
;
950 Error
*local_err
= NULL
;
953 opts
= qemu_opts_create(list
, qdict_get_try_str(qdict
, "id"), 1,
956 error_propagate(errp
, local_err
);
960 assert(opts
!= NULL
);
962 state
.errp
= &local_err
;
964 qdict_iter(qdict
, qemu_opts_from_qdict_1
, &state
);
966 error_propagate(errp
, local_err
);
975 * Adds all QDict entries to the QemuOpts that can be added and removes them
976 * from the QDict. When this function returns, the QDict contains only those
977 * entries that couldn't be added to the QemuOpts.
979 void qemu_opts_absorb_qdict(QemuOpts
*opts
, QDict
*qdict
, Error
**errp
)
981 const QDictEntry
*entry
, *next
;
983 entry
= qdict_first(qdict
);
985 while (entry
!= NULL
) {
986 Error
*local_err
= NULL
;
987 OptsFromQDictState state
= {
992 next
= qdict_next(qdict
, entry
);
994 if (find_desc_by_name(opts
->list
->desc
, entry
->key
)) {
995 qemu_opts_from_qdict_1(entry
->key
, entry
->value
, &state
);
997 error_propagate(errp
, local_err
);
1000 qdict_del(qdict
, entry
->key
);
1009 * Convert from QemuOpts to QDict.
1010 * The QDict values are of type QString.
1011 * TODO We'll want to use types appropriate for opt->desc->type, but
1012 * this is enough for now.
1014 QDict
*qemu_opts_to_qdict(QemuOpts
*opts
, QDict
*qdict
)
1020 qdict
= qdict_new();
1023 qdict_put(qdict
, "id", qstring_from_str(opts
->id
));
1025 QTAILQ_FOREACH(opt
, &opts
->head
, next
) {
1026 val
= QOBJECT(qstring_from_str(opt
->str
));
1027 qdict_put_obj(qdict
, opt
->name
, val
);
1032 /* Validate parsed opts against descriptions where no
1033 * descriptions were provided in the QemuOptsList.
1035 void qemu_opts_validate(QemuOpts
*opts
, const QemuOptDesc
*desc
, Error
**errp
)
1038 Error
*local_err
= NULL
;
1040 assert(opts_accepts_any(opts
));
1042 QTAILQ_FOREACH(opt
, &opts
->head
, next
) {
1043 opt
->desc
= find_desc_by_name(desc
, opt
->name
);
1045 error_set(errp
, QERR_INVALID_PARAMETER
, opt
->name
);
1049 qemu_opt_parse(opt
, &local_err
);
1051 error_propagate(errp
, local_err
);
1058 * For each member of @list, call @func(@opaque, member, @errp).
1059 * Call it with the current location temporarily set to the member's.
1060 * @func() may store an Error through @errp, but must return non-zero then.
1061 * When @func() returns non-zero, break the loop and return that value.
1062 * Return zero when the loop completes.
1064 int qemu_opts_foreach(QemuOptsList
*list
, qemu_opts_loopfunc func
,
1065 void *opaque
, Error
**errp
)
1071 loc_push_none(&loc
);
1072 QTAILQ_FOREACH(opts
, &list
->head
, next
) {
1073 loc_restore(&opts
->loc
);
1074 rc
= func(opaque
, opts
, errp
);
1078 assert(!errp
|| !*errp
);
1084 static size_t count_opts_list(QemuOptsList
*list
)
1086 QemuOptDesc
*desc
= NULL
;
1087 size_t num_opts
= 0;
1094 while (desc
&& desc
->name
) {
1102 void qemu_opts_free(QemuOptsList
*list
)
1107 /* Realloc dst option list and append options from an option list (list)
1108 * to it. dst could be NULL or a malloced list.
1109 * The lifetime of dst must be shorter than the input list because the
1110 * QemuOptDesc->name, ->help, and ->def_value_str strings are shared.
1112 QemuOptsList
*qemu_opts_append(QemuOptsList
*dst
,
1115 size_t num_opts
, num_dst_opts
;
1117 bool need_init
= false;
1118 bool need_head_update
;
1124 /* If dst is NULL, after realloc, some area of dst should be initialized
1125 * before adding options to it.
1129 need_head_update
= true;
1131 /* Moreover, even if dst is not NULL, the realloc may move it to a
1132 * different address in which case we may get a stale tail pointer
1134 need_head_update
= QTAILQ_EMPTY(&dst
->head
);
1137 num_opts
= count_opts_list(dst
);
1138 num_dst_opts
= num_opts
;
1139 num_opts
+= count_opts_list(list
);
1140 dst
= g_realloc(dst
, sizeof(QemuOptsList
) +
1141 (num_opts
+ 1) * sizeof(QemuOptDesc
));
1144 dst
->implied_opt_name
= NULL
;
1145 dst
->merge_lists
= false;
1147 if (need_head_update
) {
1148 QTAILQ_INIT(&dst
->head
);
1150 dst
->desc
[num_dst_opts
].name
= NULL
;
1152 /* append list->desc to dst->desc */
1155 while (desc
&& desc
->name
) {
1156 if (find_desc_by_name(dst
->desc
, desc
->name
) == NULL
) {
1157 dst
->desc
[num_dst_opts
++] = *desc
;
1158 dst
->desc
[num_dst_opts
].name
= NULL
;