| /* |
| * Commandline option parsing functions |
| * |
| * Copyright (c) 2003-2008 Fabrice Bellard |
| * Copyright (c) 2009 Kevin Wolf <kwolf@redhat.com> |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include "qemu-common.h" |
| #include "qemu-error.h" |
| #include "qemu-objects.h" |
| #include "error.h" |
| #include "qerror.h" |
| #include "qemu-option-internal.h" |
| |
| /* |
| * Extracts the name of an option from the parameter string (p points at the |
| * first byte of the option name) |
| * |
| * The option name is delimited by delim (usually , or =) or the string end |
| * and is copied into buf. If the option name is longer than buf_size, it is |
| * truncated. buf is always zero terminated. |
| * |
| * The return value is the position of the delimiter/zero byte after the option |
| * name in p. |
| */ |
| const char *get_opt_name(char *buf, int buf_size, const char *p, char delim) |
| { |
| char *q; |
| |
| q = buf; |
| while (*p != '\0' && *p != delim) { |
| if (q && (q - buf) < buf_size - 1) |
| *q++ = *p; |
| p++; |
| } |
| if (q) |
| *q = '\0'; |
| |
| return p; |
| } |
| |
| /* |
| * Extracts the value of an option from the parameter string p (p points at the |
| * first byte of the option value) |
| * |
| * This function is comparable to get_opt_name with the difference that the |
| * delimiter is fixed to be comma which starts a new option. To specify an |
| * option value that contains commas, double each comma. |
| */ |
| const char *get_opt_value(char *buf, int buf_size, const char *p) |
| { |
| char *q; |
| |
| q = buf; |
| while (*p != '\0') { |
| if (*p == ',') { |
| if (*(p + 1) != ',') |
| break; |
| p++; |
| } |
| if (q && (q - buf) < buf_size - 1) |
| *q++ = *p; |
| p++; |
| } |
| if (q) |
| *q = '\0'; |
| |
| return p; |
| } |
| |
| int get_next_param_value(char *buf, int buf_size, |
| const char *tag, const char **pstr) |
| { |
| const char *p; |
| char option[128]; |
| |
| p = *pstr; |
| for(;;) { |
| p = get_opt_name(option, sizeof(option), p, '='); |
| if (*p != '=') |
| break; |
| p++; |
| if (!strcmp(tag, option)) { |
| *pstr = get_opt_value(buf, buf_size, p); |
| if (**pstr == ',') { |
| (*pstr)++; |
| } |
| return strlen(buf); |
| } else { |
| p = get_opt_value(NULL, 0, p); |
| } |
| if (*p != ',') |
| break; |
| p++; |
| } |
| return 0; |
| } |
| |
| int get_param_value(char *buf, int buf_size, |
| const char *tag, const char *str) |
| { |
| return get_next_param_value(buf, buf_size, tag, &str); |
| } |
| |
| int check_params(char *buf, int buf_size, |
| const char * const *params, const char *str) |
| { |
| const char *p; |
| int i; |
| |
| p = str; |
| while (*p != '\0') { |
| p = get_opt_name(buf, buf_size, p, '='); |
| if (*p != '=') { |
| return -1; |
| } |
| p++; |
| for (i = 0; params[i] != NULL; i++) { |
| if (!strcmp(params[i], buf)) { |
| break; |
| } |
| } |
| if (params[i] == NULL) { |
| return -1; |
| } |
| p = get_opt_value(NULL, 0, p); |
| if (*p != ',') { |
| break; |
| } |
| p++; |
| } |
| return 0; |
| } |
| |
| /* |
| * Searches an option list for an option with the given name |
| */ |
| QEMUOptionParameter *get_option_parameter(QEMUOptionParameter *list, |
| const char *name) |
| { |
| while (list && list->name) { |
| if (!strcmp(list->name, name)) { |
| return list; |
| } |
| list++; |
| } |
| |
| return NULL; |
| } |
| |
| static void parse_option_bool(const char *name, const char *value, bool *ret, |
| Error **errp) |
| { |
| if (value != NULL) { |
| if (!strcmp(value, "on")) { |
| *ret = 1; |
| } else if (!strcmp(value, "off")) { |
| *ret = 0; |
| } else { |
| error_set(errp,QERR_INVALID_PARAMETER_VALUE, name, "'on' or 'off'"); |
| } |
| } else { |
| *ret = 1; |
| } |
| } |
| |
| static void parse_option_number(const char *name, const char *value, |
| uint64_t *ret, Error **errp) |
| { |
| char *postfix; |
| uint64_t number; |
| |
| if (value != NULL) { |
| number = strtoull(value, &postfix, 0); |
| if (*postfix != '\0') { |
| error_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a number"); |
| return; |
| } |
| *ret = number; |
| } else { |
| error_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a number"); |
| } |
| } |
| |
| static void parse_option_size(const char *name, const char *value, |
| uint64_t *ret, Error **errp) |
| { |
| char *postfix; |
| double sizef; |
| |
| if (value != NULL) { |
| sizef = strtod(value, &postfix); |
| switch (*postfix) { |
| case 'T': |
| sizef *= 1024; |
| /* fall through */ |
| case 'G': |
| sizef *= 1024; |
| /* fall through */ |
| case 'M': |
| sizef *= 1024; |
| /* fall through */ |
| case 'K': |
| case 'k': |
| sizef *= 1024; |
| /* fall through */ |
| case 'b': |
| case '\0': |
| *ret = (uint64_t) sizef; |
| break; |
| default: |
| error_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a size"); |
| error_printf_unless_qmp("You may use k, M, G or T suffixes for " |
| "kilobytes, megabytes, gigabytes and terabytes.\n"); |
| return; |
| } |
| } else { |
| error_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a size"); |
| } |
| } |
| |
| /* |
| * Sets the value of a parameter in a given option list. The parsing of the |
| * value depends on the type of option: |
| * |
| * OPT_FLAG (uses value.n): |
| * If no value is given, the flag is set to 1. |
| * Otherwise the value must be "on" (set to 1) or "off" (set to 0) |
| * |
| * OPT_STRING (uses value.s): |
| * value is strdup()ed and assigned as option value |
| * |
| * OPT_SIZE (uses value.n): |
| * The value is converted to an integer. Suffixes for kilobytes etc. are |
| * allowed (powers of 1024). |
| * |
| * Returns 0 on succes, -1 in error cases |
| */ |
| int set_option_parameter(QEMUOptionParameter *list, const char *name, |
| const char *value) |
| { |
| bool flag; |
| Error *local_err = NULL; |
| |
| // Find a matching parameter |
| list = get_option_parameter(list, name); |
| if (list == NULL) { |
| fprintf(stderr, "Unknown option '%s'\n", name); |
| return -1; |
| } |
| |
| // Process parameter |
| switch (list->type) { |
| case OPT_FLAG: |
| parse_option_bool(name, value, &flag, &local_err); |
| if (!error_is_set(&local_err)) { |
| list->value.n = flag; |
| } |
| break; |
| |
| case OPT_STRING: |
| if (value != NULL) { |
| list->value.s = g_strdup(value); |
| } else { |
| fprintf(stderr, "Option '%s' needs a parameter\n", name); |
| return -1; |
| } |
| break; |
| |
| case OPT_SIZE: |
| parse_option_size(name, value, &list->value.n, &local_err); |
| break; |
| |
| default: |
| fprintf(stderr, "Bug: Option '%s' has an unknown type\n", name); |
| return -1; |
| } |
| |
| if (error_is_set(&local_err)) { |
| qerror_report_err(local_err); |
| error_free(local_err); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Sets the given parameter to an integer instead of a string. |
| * This function cannot be used to set string options. |
| * |
| * Returns 0 on success, -1 in error cases |
| */ |
| int set_option_parameter_int(QEMUOptionParameter *list, const char *name, |
| uint64_t value) |
| { |
| // Find a matching parameter |
| list = get_option_parameter(list, name); |
| if (list == NULL) { |
| fprintf(stderr, "Unknown option '%s'\n", name); |
| return -1; |
| } |
| |
| // Process parameter |
| switch (list->type) { |
| case OPT_FLAG: |
| case OPT_NUMBER: |
| case OPT_SIZE: |
| list->value.n = value; |
| break; |
| |
| default: |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Frees a option list. If it contains strings, the strings are freed as well. |
| */ |
| void free_option_parameters(QEMUOptionParameter *list) |
| { |
| QEMUOptionParameter *cur = list; |
| |
| while (cur && cur->name) { |
| if (cur->type == OPT_STRING) { |
| g_free(cur->value.s); |
| } |
| cur++; |
| } |
| |
| g_free(list); |
| } |
| |
| /* |
| * Count valid options in list |
| */ |
| static size_t count_option_parameters(QEMUOptionParameter *list) |
| { |
| size_t num_options = 0; |
| |
| while (list && list->name) { |
| num_options++; |
| list++; |
| } |
| |
| return num_options; |
| } |
| |
| /* |
| * Append an option list (list) to an option list (dest). |
| * |
| * If dest is NULL, a new copy of list is created. |
| * |
| * Returns a pointer to the first element of dest (or the newly allocated copy) |
| */ |
| QEMUOptionParameter *append_option_parameters(QEMUOptionParameter *dest, |
| QEMUOptionParameter *list) |
| { |
| size_t num_options, num_dest_options; |
| |
| num_options = count_option_parameters(dest); |
| num_dest_options = num_options; |
| |
| num_options += count_option_parameters(list); |
| |
| dest = g_realloc(dest, (num_options + 1) * sizeof(QEMUOptionParameter)); |
| dest[num_dest_options].name = NULL; |
| |
| while (list && list->name) { |
| if (get_option_parameter(dest, list->name) == NULL) { |
| dest[num_dest_options++] = *list; |
| dest[num_dest_options].name = NULL; |
| } |
| list++; |
| } |
| |
| return dest; |
| } |
| |
| /* |
| * Parses a parameter string (param) into an option list (dest). |
| * |
| * list is the template option list. If dest is NULL, a new copy of list is |
| * created. If list is NULL, this function fails. |
| * |
| * A parameter string consists of one or more parameters, separated by commas. |
| * Each parameter consists of its name and possibly of a value. In the latter |
| * case, the value is delimited by an = character. To specify a value which |
| * contains commas, double each comma so it won't be recognized as the end of |
| * the parameter. |
| * |
| * For more details of the parsing see above. |
| * |
| * Returns a pointer to the first element of dest (or the newly allocated copy) |
| * or NULL in error cases |
| */ |
| QEMUOptionParameter *parse_option_parameters(const char *param, |
| QEMUOptionParameter *list, QEMUOptionParameter *dest) |
| { |
| QEMUOptionParameter *allocated = NULL; |
| char name[256]; |
| char value[256]; |
| char *param_delim, *value_delim; |
| char next_delim; |
| |
| if (list == NULL) { |
| return NULL; |
| } |
| |
| if (dest == NULL) { |
| dest = allocated = append_option_parameters(NULL, list); |
| } |
| |
| while (*param) { |
| |
| // Find parameter name and value in the string |
| param_delim = strchr(param, ','); |
| value_delim = strchr(param, '='); |
| |
| if (value_delim && (value_delim < param_delim || !param_delim)) { |
| next_delim = '='; |
| } else { |
| next_delim = ','; |
| value_delim = NULL; |
| } |
| |
| param = get_opt_name(name, sizeof(name), param, next_delim); |
| if (value_delim) { |
| param = get_opt_value(value, sizeof(value), param + 1); |
| } |
| if (*param != '\0') { |
| param++; |
| } |
| |
| // Set the parameter |
| if (set_option_parameter(dest, name, value_delim ? value : NULL)) { |
| goto fail; |
| } |
| } |
| |
| return dest; |
| |
| fail: |
| // Only free the list if it was newly allocated |
| free_option_parameters(allocated); |
| return NULL; |
| } |
| |
| /* |
| * Prints all options of a list that have a value to stdout |
| */ |
| void print_option_parameters(QEMUOptionParameter *list) |
| { |
| while (list && list->name) { |
| switch (list->type) { |
| case OPT_STRING: |
| if (list->value.s != NULL) { |
| printf("%s='%s' ", list->name, list->value.s); |
| } |
| break; |
| case OPT_FLAG: |
| printf("%s=%s ", list->name, list->value.n ? "on" : "off"); |
| break; |
| case OPT_SIZE: |
| case OPT_NUMBER: |
| printf("%s=%" PRId64 " ", list->name, list->value.n); |
| break; |
| default: |
| printf("%s=(unknown type) ", list->name); |
| break; |
| } |
| list++; |
| } |
| } |
| |
| /* |
| * Prints an overview of all available options |
| */ |
| void print_option_help(QEMUOptionParameter *list) |
| { |
| printf("Supported options:\n"); |
| while (list && list->name) { |
| printf("%-16s %s\n", list->name, |
| list->help ? list->help : "No description available"); |
| list++; |
| } |
| } |
| |
| /* ------------------------------------------------------------------ */ |
| |
| static QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name) |
| { |
| QemuOpt *opt; |
| |
| QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) { |
| if (strcmp(opt->name, name) != 0) |
| continue; |
| return opt; |
| } |
| return NULL; |
| } |
| |
| const char *qemu_opt_get(QemuOpts *opts, const char *name) |
| { |
| QemuOpt *opt = qemu_opt_find(opts, name); |
| return opt ? opt->str : NULL; |
| } |
| |
| bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval) |
| { |
| QemuOpt *opt = qemu_opt_find(opts, name); |
| |
| if (opt == NULL) |
| return defval; |
| assert(opt->desc && opt->desc->type == QEMU_OPT_BOOL); |
| return opt->value.boolean; |
| } |
| |
| uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval) |
| { |
| QemuOpt *opt = qemu_opt_find(opts, name); |
| |
| if (opt == NULL) |
| return defval; |
| assert(opt->desc && opt->desc->type == QEMU_OPT_NUMBER); |
| return opt->value.uint; |
| } |
| |
| uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval) |
| { |
| QemuOpt *opt = qemu_opt_find(opts, name); |
| |
| if (opt == NULL) |
| return defval; |
| assert(opt->desc && opt->desc->type == QEMU_OPT_SIZE); |
| return opt->value.uint; |
| } |
| |
| static void qemu_opt_parse(QemuOpt *opt, Error **errp) |
| { |
| if (opt->desc == NULL) |
| return; |
| |
| switch (opt->desc->type) { |
| case QEMU_OPT_STRING: |
| /* nothing */ |
| return; |
| case QEMU_OPT_BOOL: |
| parse_option_bool(opt->name, opt->str, &opt->value.boolean, errp); |
| break; |
| case QEMU_OPT_NUMBER: |
| parse_option_number(opt->name, opt->str, &opt->value.uint, errp); |
| break; |
| case QEMU_OPT_SIZE: |
| parse_option_size(opt->name, opt->str, &opt->value.uint, errp); |
| break; |
| default: |
| abort(); |
| } |
| } |
| |
| static void qemu_opt_del(QemuOpt *opt) |
| { |
| QTAILQ_REMOVE(&opt->opts->head, opt, next); |
| g_free((/* !const */ char*)opt->name); |
| g_free((/* !const */ char*)opt->str); |
| g_free(opt); |
| } |
| |
| static void opt_set(QemuOpts *opts, const char *name, const char *value, |
| bool prepend, Error **errp) |
| { |
| QemuOpt *opt; |
| const QemuOptDesc *desc = opts->list->desc; |
| Error *local_err = NULL; |
| int i; |
| |
| for (i = 0; desc[i].name != NULL; i++) { |
| if (strcmp(desc[i].name, name) == 0) { |
| break; |
| } |
| } |
| if (desc[i].name == NULL) { |
| if (i == 0) { |
| /* empty list -> allow any */; |
| } else { |
| error_set(errp, QERR_INVALID_PARAMETER, name); |
| return; |
| } |
| } |
| |
| opt = g_malloc0(sizeof(*opt)); |
| opt->name = g_strdup(name); |
| opt->opts = opts; |
| if (prepend) { |
| QTAILQ_INSERT_HEAD(&opts->head, opt, next); |
| } else { |
| QTAILQ_INSERT_TAIL(&opts->head, opt, next); |
| } |
| if (desc[i].name != NULL) { |
| opt->desc = desc+i; |
| } |
| if (value) { |
| opt->str = g_strdup(value); |
| } |
| qemu_opt_parse(opt, &local_err); |
| if (error_is_set(&local_err)) { |
| error_propagate(errp, local_err); |
| qemu_opt_del(opt); |
| } |
| } |
| |
| int qemu_opt_set(QemuOpts *opts, const char *name, const char *value) |
| { |
| Error *local_err = NULL; |
| |
| opt_set(opts, name, value, false, &local_err); |
| if (error_is_set(&local_err)) { |
| qerror_report_err(local_err); |
| error_free(local_err); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| void qemu_opt_set_err(QemuOpts *opts, const char *name, const char *value, |
| Error **errp) |
| { |
| opt_set(opts, name, value, false, errp); |
| } |
| |
| int qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val) |
| { |
| QemuOpt *opt; |
| const QemuOptDesc *desc = opts->list->desc; |
| int i; |
| |
| for (i = 0; desc[i].name != NULL; i++) { |
| if (strcmp(desc[i].name, name) == 0) { |
| break; |
| } |
| } |
| if (desc[i].name == NULL) { |
| if (i == 0) { |
| /* empty list -> allow any */; |
| } else { |
| qerror_report(QERR_INVALID_PARAMETER, name); |
| return -1; |
| } |
| } |
| |
| opt = g_malloc0(sizeof(*opt)); |
| opt->name = g_strdup(name); |
| opt->opts = opts; |
| QTAILQ_INSERT_TAIL(&opts->head, opt, next); |
| if (desc[i].name != NULL) { |
| opt->desc = desc+i; |
| } |
| opt->value.boolean = !!val; |
| return 0; |
| } |
| |
| int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque, |
| int abort_on_failure) |
| { |
| QemuOpt *opt; |
| int rc = 0; |
| |
| QTAILQ_FOREACH(opt, &opts->head, next) { |
| rc = func(opt->name, opt->str, opaque); |
| if (abort_on_failure && rc != 0) |
| break; |
| } |
| return rc; |
| } |
| |
| QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id) |
| { |
| QemuOpts *opts; |
| |
| QTAILQ_FOREACH(opts, &list->head, next) { |
| if (!opts->id) { |
| if (!id) { |
| return opts; |
| } |
| continue; |
| } |
| if (strcmp(opts->id, id) != 0) { |
| continue; |
| } |
| return opts; |
| } |
| return NULL; |
| } |
| |
| static int id_wellformed(const char *id) |
| { |
| int i; |
| |
| if (!qemu_isalpha(id[0])) { |
| return 0; |
| } |
| for (i = 1; id[i]; i++) { |
| if (!qemu_isalnum(id[i]) && !strchr("-._", id[i])) { |
| return 0; |
| } |
| } |
| return 1; |
| } |
| |
| QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id, |
| int fail_if_exists, Error **errp) |
| { |
| QemuOpts *opts = NULL; |
| |
| if (id) { |
| if (!id_wellformed(id)) { |
| error_set(errp,QERR_INVALID_PARAMETER_VALUE, "id", "an identifier"); |
| error_printf_unless_qmp("Identifiers consist of letters, digits, '-', '.', '_', starting with a letter.\n"); |
| return NULL; |
| } |
| opts = qemu_opts_find(list, id); |
| if (opts != NULL) { |
| if (fail_if_exists && !list->merge_lists) { |
| error_set(errp, QERR_DUPLICATE_ID, id, list->name); |
| return NULL; |
| } else { |
| return opts; |
| } |
| } |
| } else if (list->merge_lists) { |
| opts = qemu_opts_find(list, NULL); |
| if (opts) { |
| return opts; |
| } |
| } |
| opts = g_malloc0(sizeof(*opts)); |
| if (id) { |
| opts->id = g_strdup(id); |
| } |
| opts->list = list; |
| loc_save(&opts->loc); |
| QTAILQ_INIT(&opts->head); |
| QTAILQ_INSERT_TAIL(&list->head, opts, next); |
| return opts; |
| } |
| |
| void qemu_opts_reset(QemuOptsList *list) |
| { |
| QemuOpts *opts, *next_opts; |
| |
| QTAILQ_FOREACH_SAFE(opts, &list->head, next, next_opts) { |
| qemu_opts_del(opts); |
| } |
| } |
| |
| void qemu_opts_loc_restore(QemuOpts *opts) |
| { |
| loc_restore(&opts->loc); |
| } |
| |
| int qemu_opts_set(QemuOptsList *list, const char *id, |
| const char *name, const char *value) |
| { |
| QemuOpts *opts; |
| Error *local_err = NULL; |
| |
| opts = qemu_opts_create(list, id, 1, &local_err); |
| if (error_is_set(&local_err)) { |
| qerror_report_err(local_err); |
| error_free(local_err); |
| return -1; |
| } |
| return qemu_opt_set(opts, name, value); |
| } |
| |
| const char *qemu_opts_id(QemuOpts *opts) |
| { |
| return opts->id; |
| } |
| |
| void qemu_opts_del(QemuOpts *opts) |
| { |
| QemuOpt *opt; |
| |
| for (;;) { |
| opt = QTAILQ_FIRST(&opts->head); |
| if (opt == NULL) |
| break; |
| qemu_opt_del(opt); |
| } |
| QTAILQ_REMOVE(&opts->list->head, opts, next); |
| g_free(opts->id); |
| g_free(opts); |
| } |
| |
| int qemu_opts_print(QemuOpts *opts, void *dummy) |
| { |
| QemuOpt *opt; |
| |
| fprintf(stderr, "%s: %s:", opts->list->name, |
| opts->id ? opts->id : "<noid>"); |
| QTAILQ_FOREACH(opt, &opts->head, next) { |
| fprintf(stderr, " %s=\"%s\"", opt->name, opt->str); |
| } |
| fprintf(stderr, "\n"); |
| return 0; |
| } |
| |
| static int opts_do_parse(QemuOpts *opts, const char *params, |
| const char *firstname, bool prepend) |
| { |
| char option[128], value[1024]; |
| const char *p,*pe,*pc; |
| Error *local_err = NULL; |
| |
| for (p = params; *p != '\0'; p++) { |
| pe = strchr(p, '='); |
| pc = strchr(p, ','); |
| if (!pe || (pc && pc < pe)) { |
| /* found "foo,more" */ |
| if (p == params && firstname) { |
| /* implicitly named first option */ |
| pstrcpy(option, sizeof(option), firstname); |
| p = get_opt_value(value, sizeof(value), p); |
| } else { |
| /* option without value, probably a flag */ |
| p = get_opt_name(option, sizeof(option), p, ','); |
| if (strncmp(option, "no", 2) == 0) { |
| memmove(option, option+2, strlen(option+2)+1); |
| pstrcpy(value, sizeof(value), "off"); |
| } else { |
| pstrcpy(value, sizeof(value), "on"); |
| } |
| } |
| } else { |
| /* found "foo=bar,more" */ |
| p = get_opt_name(option, sizeof(option), p, '='); |
| if (*p != '=') { |
| break; |
| } |
| p++; |
| p = get_opt_value(value, sizeof(value), p); |
| } |
| if (strcmp(option, "id") != 0) { |
| /* store and parse */ |
| opt_set(opts, option, value, prepend, &local_err); |
| if (error_is_set(&local_err)) { |
| qerror_report_err(local_err); |
| error_free(local_err); |
| return -1; |
| } |
| } |
| if (*p != ',') { |
| break; |
| } |
| } |
| return 0; |
| } |
| |
| int qemu_opts_do_parse(QemuOpts *opts, const char *params, const char *firstname) |
| { |
| return opts_do_parse(opts, params, firstname, false); |
| } |
| |
| static QemuOpts *opts_parse(QemuOptsList *list, const char *params, |
| int permit_abbrev, bool defaults) |
| { |
| const char *firstname; |
| char value[1024], *id = NULL; |
| const char *p; |
| QemuOpts *opts; |
| Error *local_err = NULL; |
| |
| assert(!permit_abbrev || list->implied_opt_name); |
| firstname = permit_abbrev ? list->implied_opt_name : NULL; |
| |
| if (strncmp(params, "id=", 3) == 0) { |
| get_opt_value(value, sizeof(value), params+3); |
| id = value; |
| } else if ((p = strstr(params, ",id=")) != NULL) { |
| get_opt_value(value, sizeof(value), p+4); |
| id = value; |
| } |
| if (defaults) { |
| if (!id && !QTAILQ_EMPTY(&list->head)) { |
| opts = qemu_opts_find(list, NULL); |
| } else { |
| opts = qemu_opts_create(list, id, 0, &local_err); |
| } |
| } else { |
| opts = qemu_opts_create(list, id, 1, &local_err); |
| } |
| if (opts == NULL) { |
| if (error_is_set(&local_err)) { |
| qerror_report_err(local_err); |
| error_free(local_err); |
| } |
| return NULL; |
| } |
| |
| if (opts_do_parse(opts, params, firstname, defaults) != 0) { |
| qemu_opts_del(opts); |
| return NULL; |
| } |
| |
| return opts; |
| } |
| |
| QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params, |
| int permit_abbrev) |
| { |
| return opts_parse(list, params, permit_abbrev, false); |
| } |
| |
| void qemu_opts_set_defaults(QemuOptsList *list, const char *params, |
| int permit_abbrev) |
| { |
| QemuOpts *opts; |
| |
| opts = opts_parse(list, params, permit_abbrev, true); |
| assert(opts); |
| } |
| |
| typedef struct OptsFromQDictState { |
| QemuOpts *opts; |
| Error **errp; |
| } OptsFromQDictState; |
| |
| static void qemu_opts_from_qdict_1(const char *key, QObject *obj, void *opaque) |
| { |
| OptsFromQDictState *state = opaque; |
| char buf[32]; |
| const char *value; |
| int n; |
| |
| if (!strcmp(key, "id") || error_is_set(state->errp)) { |
| return; |
| } |
| |
| switch (qobject_type(obj)) { |
| case QTYPE_QSTRING: |
| value = qstring_get_str(qobject_to_qstring(obj)); |
| break; |
| case QTYPE_QINT: |
| n = snprintf(buf, sizeof(buf), "%" PRId64, |
| qint_get_int(qobject_to_qint(obj))); |
| assert(n < sizeof(buf)); |
| value = buf; |
| break; |
| case QTYPE_QFLOAT: |
| n = snprintf(buf, sizeof(buf), "%.17g", |
| qfloat_get_double(qobject_to_qfloat(obj))); |
| assert(n < sizeof(buf)); |
| value = buf; |
| break; |
| case QTYPE_QBOOL: |
| pstrcpy(buf, sizeof(buf), |
| qbool_get_int(qobject_to_qbool(obj)) ? "on" : "off"); |
| value = buf; |
| break; |
| default: |
| return; |
| } |
| |
| qemu_opt_set_err(state->opts, key, value, state->errp); |
| } |
| |
| /* |
| * Create QemuOpts from a QDict. |
| * Use value of key "id" as ID if it exists and is a QString. |
| * Only QStrings, QInts, QFloats and QBools are copied. Entries with |
| * other types are silently ignored. |
| */ |
| QemuOpts *qemu_opts_from_qdict(QemuOptsList *list, const QDict *qdict, |
| Error **errp) |
| { |
| OptsFromQDictState state; |
| Error *local_err = NULL; |
| QemuOpts *opts; |
| |
| opts = qemu_opts_create(list, qdict_get_try_str(qdict, "id"), 1, |
| &local_err); |
| if (error_is_set(&local_err)) { |
| error_propagate(errp, local_err); |
| return NULL; |
| } |
| |
| assert(opts != NULL); |
| |
| state.errp = &local_err; |
| state.opts = opts; |
| qdict_iter(qdict, qemu_opts_from_qdict_1, &state); |
| if (error_is_set(&local_err)) { |
| error_propagate(errp, local_err); |
| qemu_opts_del(opts); |
| return NULL; |
| } |
| |
| return opts; |
| } |
| |
| /* |
| * Convert from QemuOpts to QDict. |
| * The QDict values are of type QString. |
| * TODO We'll want to use types appropriate for opt->desc->type, but |
| * this is enough for now. |
| */ |
| QDict *qemu_opts_to_qdict(QemuOpts *opts, QDict *qdict) |
| { |
| QemuOpt *opt; |
| QObject *val; |
| |
| if (!qdict) { |
| qdict = qdict_new(); |
| } |
| if (opts->id) { |
| qdict_put(qdict, "id", qstring_from_str(opts->id)); |
| } |
| QTAILQ_FOREACH(opt, &opts->head, next) { |
| val = QOBJECT(qstring_from_str(opt->str)); |
| qdict_put_obj(qdict, opt->name, val); |
| } |
| return qdict; |
| } |
| |
| /* Validate parsed opts against descriptions where no |
| * descriptions were provided in the QemuOptsList. |
| */ |
| void qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc, Error **errp) |
| { |
| QemuOpt *opt; |
| Error *local_err = NULL; |
| |
| assert(opts->list->desc[0].name == NULL); |
| |
| QTAILQ_FOREACH(opt, &opts->head, next) { |
| int i; |
| |
| for (i = 0; desc[i].name != NULL; i++) { |
| if (strcmp(desc[i].name, opt->name) == 0) { |
| break; |
| } |
| } |
| if (desc[i].name == NULL) { |
| error_set(errp, QERR_INVALID_PARAMETER, opt->name); |
| return; |
| } |
| |
| opt->desc = &desc[i]; |
| |
| qemu_opt_parse(opt, &local_err); |
| if (error_is_set(&local_err)) { |
| error_propagate(errp, local_err); |
| return; |
| } |
| } |
| } |
| |
| int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, void *opaque, |
| int abort_on_failure) |
| { |
| Location loc; |
| QemuOpts *opts; |
| int rc = 0; |
| |
| loc_push_none(&loc); |
| QTAILQ_FOREACH(opts, &list->head, next) { |
| loc_restore(&opts->loc); |
| rc |= func(opts, opaque); |
| if (abort_on_failure && rc != 0) |
| break; |
| } |
| loc_pop(&loc); |
| return rc; |
| } |