1206 lines
31 KiB
C
1206 lines
31 KiB
C
/*
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* Commandline option parsing functions
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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* Copyright (c) 2009 Kevin Wolf <kwolf@redhat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <string.h>
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#include "qemu-common.h"
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#include "qemu/error-report.h"
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#include "qapi/qmp/types.h"
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#include "qapi/error.h"
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#include "qapi/qmp/qerror.h"
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#include "qemu/option_int.h"
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/*
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* Extracts the name of an option from the parameter string (p points at the
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* first byte of the option name)
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*
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* The option name is delimited by delim (usually , or =) or the string end
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* and is copied into buf. If the option name is longer than buf_size, it is
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* truncated. buf is always zero terminated.
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*
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* The return value is the position of the delimiter/zero byte after the option
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* name in p.
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*/
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const char *get_opt_name(char *buf, int buf_size, const char *p, char delim)
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{
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char *q;
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q = buf;
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while (*p != '\0' && *p != delim) {
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if (q && (q - buf) < buf_size - 1)
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*q++ = *p;
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p++;
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}
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if (q)
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*q = '\0';
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return p;
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}
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/*
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* Extracts the value of an option from the parameter string p (p points at the
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* first byte of the option value)
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*
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* This function is comparable to get_opt_name with the difference that the
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* delimiter is fixed to be comma which starts a new option. To specify an
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* option value that contains commas, double each comma.
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*/
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const char *get_opt_value(char *buf, int buf_size, const char *p)
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{
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char *q;
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q = buf;
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while (*p != '\0') {
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if (*p == ',') {
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if (*(p + 1) != ',')
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break;
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p++;
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}
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if (q && (q - buf) < buf_size - 1)
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*q++ = *p;
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p++;
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}
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if (q)
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*q = '\0';
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return p;
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}
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int get_next_param_value(char *buf, int buf_size,
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const char *tag, const char **pstr)
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{
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const char *p;
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char option[128];
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p = *pstr;
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for(;;) {
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p = get_opt_name(option, sizeof(option), p, '=');
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if (*p != '=')
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break;
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p++;
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if (!strcmp(tag, option)) {
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*pstr = get_opt_value(buf, buf_size, p);
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if (**pstr == ',') {
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(*pstr)++;
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}
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return strlen(buf);
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} else {
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p = get_opt_value(NULL, 0, p);
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}
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if (*p != ',')
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break;
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p++;
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}
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return 0;
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}
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int get_param_value(char *buf, int buf_size,
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const char *tag, const char *str)
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{
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return get_next_param_value(buf, buf_size, tag, &str);
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}
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static void parse_option_bool(const char *name, const char *value, bool *ret,
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Error **errp)
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{
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if (value != NULL) {
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if (!strcmp(value, "on")) {
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*ret = 1;
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} else if (!strcmp(value, "off")) {
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*ret = 0;
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} else {
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error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
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name, "'on' or 'off'");
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}
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} else {
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*ret = 1;
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}
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}
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static void parse_option_number(const char *name, const char *value,
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uint64_t *ret, Error **errp)
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{
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char *postfix;
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uint64_t number;
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if (value != NULL) {
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number = strtoull(value, &postfix, 0);
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if (*postfix != '\0') {
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error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, "a number");
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return;
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}
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*ret = number;
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} else {
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error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, "a number");
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}
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}
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static const QemuOptDesc *find_desc_by_name(const QemuOptDesc *desc,
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const char *name)
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{
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int i;
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for (i = 0; desc[i].name != NULL; i++) {
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if (strcmp(desc[i].name, name) == 0) {
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return &desc[i];
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}
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}
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return NULL;
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}
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void parse_option_size(const char *name, const char *value,
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uint64_t *ret, Error **errp)
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{
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char *postfix;
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double sizef;
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if (value != NULL) {
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sizef = strtod(value, &postfix);
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if (sizef < 0 || sizef > UINT64_MAX) {
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error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name,
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"a non-negative number below 2^64");
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return;
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}
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switch (*postfix) {
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case 'T':
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sizef *= 1024;
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/* fall through */
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case 'G':
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sizef *= 1024;
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/* fall through */
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case 'M':
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sizef *= 1024;
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/* fall through */
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case 'K':
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case 'k':
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sizef *= 1024;
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/* fall through */
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case 'b':
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case '\0':
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*ret = (uint64_t) sizef;
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break;
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default:
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error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, "a size");
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error_append_hint(errp, "You may use k, M, G or T suffixes for "
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"kilobytes, megabytes, gigabytes and terabytes.");
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return;
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}
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} else {
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error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, "a size");
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}
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}
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bool has_help_option(const char *param)
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{
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size_t buflen = strlen(param) + 1;
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char *buf = g_malloc(buflen);
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const char *p = param;
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bool result = false;
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while (*p) {
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p = get_opt_value(buf, buflen, p);
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if (*p) {
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p++;
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}
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if (is_help_option(buf)) {
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result = true;
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goto out;
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}
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}
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out:
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g_free(buf);
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return result;
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}
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bool is_valid_option_list(const char *param)
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{
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size_t buflen = strlen(param) + 1;
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char *buf = g_malloc(buflen);
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const char *p = param;
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bool result = true;
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while (*p) {
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p = get_opt_value(buf, buflen, p);
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if (*p && !*++p) {
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result = false;
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goto out;
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}
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if (!*buf || *buf == ',') {
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result = false;
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goto out;
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}
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}
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out:
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g_free(buf);
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return result;
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}
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void qemu_opts_print_help(QemuOptsList *list)
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{
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QemuOptDesc *desc;
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assert(list);
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desc = list->desc;
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printf("Supported options:\n");
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while (desc && desc->name) {
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printf("%-16s %s\n", desc->name,
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desc->help ? desc->help : "No description available");
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desc++;
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}
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}
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/* ------------------------------------------------------------------ */
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QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name)
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{
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QemuOpt *opt;
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QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) {
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if (strcmp(opt->name, name) != 0)
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continue;
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return opt;
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}
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return NULL;
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}
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static void qemu_opt_del(QemuOpt *opt)
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{
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QTAILQ_REMOVE(&opt->opts->head, opt, next);
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g_free(opt->name);
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g_free(opt->str);
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g_free(opt);
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}
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/* qemu_opt_set allows many settings for the same option.
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* This function deletes all settings for an option.
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*/
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static void qemu_opt_del_all(QemuOpts *opts, const char *name)
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{
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QemuOpt *opt, *next_opt;
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QTAILQ_FOREACH_SAFE(opt, &opts->head, next, next_opt) {
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if (!strcmp(opt->name, name)) {
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qemu_opt_del(opt);
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}
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}
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}
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const char *qemu_opt_get(QemuOpts *opts, const char *name)
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{
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QemuOpt *opt;
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if (opts == NULL) {
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return NULL;
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}
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opt = qemu_opt_find(opts, name);
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if (!opt) {
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const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name);
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if (desc && desc->def_value_str) {
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return desc->def_value_str;
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}
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}
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return opt ? opt->str : NULL;
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}
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/* Get a known option (or its default) and remove it from the list
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* all in one action. Return a malloced string of the option value.
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* Result must be freed by caller with g_free().
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*/
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char *qemu_opt_get_del(QemuOpts *opts, const char *name)
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{
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QemuOpt *opt;
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const QemuOptDesc *desc;
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char *str = NULL;
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if (opts == NULL) {
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return NULL;
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}
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opt = qemu_opt_find(opts, name);
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if (!opt) {
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desc = find_desc_by_name(opts->list->desc, name);
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if (desc && desc->def_value_str) {
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str = g_strdup(desc->def_value_str);
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}
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return str;
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}
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str = opt->str;
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opt->str = NULL;
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qemu_opt_del_all(opts, name);
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return str;
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}
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bool qemu_opt_has_help_opt(QemuOpts *opts)
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{
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QemuOpt *opt;
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QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) {
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if (is_help_option(opt->name)) {
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return true;
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}
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}
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return false;
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}
|
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|
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static bool qemu_opt_get_bool_helper(QemuOpts *opts, const char *name,
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bool defval, bool del)
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{
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QemuOpt *opt;
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bool ret = defval;
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|
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if (opts == NULL) {
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return ret;
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}
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opt = qemu_opt_find(opts, name);
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if (opt == NULL) {
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const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name);
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if (desc && desc->def_value_str) {
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parse_option_bool(name, desc->def_value_str, &ret, &error_abort);
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}
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return ret;
|
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}
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assert(opt->desc && opt->desc->type == QEMU_OPT_BOOL);
|
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ret = opt->value.boolean;
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if (del) {
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qemu_opt_del_all(opts, name);
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}
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return ret;
|
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}
|
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|
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bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval)
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{
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return qemu_opt_get_bool_helper(opts, name, defval, false);
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}
|
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|
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bool qemu_opt_get_bool_del(QemuOpts *opts, const char *name, bool defval)
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{
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return qemu_opt_get_bool_helper(opts, name, defval, true);
|
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}
|
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|
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static uint64_t qemu_opt_get_number_helper(QemuOpts *opts, const char *name,
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uint64_t defval, bool del)
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{
|
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QemuOpt *opt;
|
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uint64_t ret = defval;
|
|
|
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if (opts == NULL) {
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return ret;
|
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}
|
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|
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opt = qemu_opt_find(opts, name);
|
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if (opt == NULL) {
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const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name);
|
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if (desc && desc->def_value_str) {
|
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parse_option_number(name, desc->def_value_str, &ret, &error_abort);
|
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}
|
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return ret;
|
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}
|
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assert(opt->desc && opt->desc->type == QEMU_OPT_NUMBER);
|
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ret = opt->value.uint;
|
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if (del) {
|
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qemu_opt_del_all(opts, name);
|
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}
|
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return ret;
|
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}
|
|
|
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uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval)
|
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{
|
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return qemu_opt_get_number_helper(opts, name, defval, false);
|
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}
|
|
|
|
uint64_t qemu_opt_get_number_del(QemuOpts *opts, const char *name,
|
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uint64_t defval)
|
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{
|
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return qemu_opt_get_number_helper(opts, name, defval, true);
|
|
}
|
|
|
|
static uint64_t qemu_opt_get_size_helper(QemuOpts *opts, const char *name,
|
|
uint64_t defval, bool del)
|
|
{
|
|
QemuOpt *opt;
|
|
uint64_t ret = defval;
|
|
|
|
if (opts == NULL) {
|
|
return ret;
|
|
}
|
|
|
|
opt = qemu_opt_find(opts, name);
|
|
if (opt == NULL) {
|
|
const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name);
|
|
if (desc && desc->def_value_str) {
|
|
parse_option_size(name, desc->def_value_str, &ret, &error_abort);
|
|
}
|
|
return ret;
|
|
}
|
|
assert(opt->desc && opt->desc->type == QEMU_OPT_SIZE);
|
|
ret = opt->value.uint;
|
|
if (del) {
|
|
qemu_opt_del_all(opts, name);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval)
|
|
{
|
|
return qemu_opt_get_size_helper(opts, name, defval, false);
|
|
}
|
|
|
|
uint64_t qemu_opt_get_size_del(QemuOpts *opts, const char *name,
|
|
uint64_t defval)
|
|
{
|
|
return qemu_opt_get_size_helper(opts, name, defval, true);
|
|
}
|
|
|
|
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 bool opts_accepts_any(const QemuOpts *opts)
|
|
{
|
|
return opts->list->desc[0].name == NULL;
|
|
}
|
|
|
|
int qemu_opt_unset(QemuOpts *opts, const char *name)
|
|
{
|
|
QemuOpt *opt = qemu_opt_find(opts, name);
|
|
|
|
assert(opts_accepts_any(opts));
|
|
|
|
if (opt == NULL) {
|
|
return -1;
|
|
} else {
|
|
qemu_opt_del(opt);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static void opt_set(QemuOpts *opts, const char *name, const char *value,
|
|
bool prepend, Error **errp)
|
|
{
|
|
QemuOpt *opt;
|
|
const QemuOptDesc *desc;
|
|
Error *local_err = NULL;
|
|
|
|
desc = find_desc_by_name(opts->list->desc, name);
|
|
if (!desc && !opts_accepts_any(opts)) {
|
|
error_setg(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);
|
|
}
|
|
opt->desc = desc;
|
|
opt->str = g_strdup(value);
|
|
qemu_opt_parse(opt, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
qemu_opt_del(opt);
|
|
}
|
|
}
|
|
|
|
void qemu_opt_set(QemuOpts *opts, const char *name, const char *value,
|
|
Error **errp)
|
|
{
|
|
opt_set(opts, name, value, false, errp);
|
|
}
|
|
|
|
void qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val,
|
|
Error **errp)
|
|
{
|
|
QemuOpt *opt;
|
|
const QemuOptDesc *desc = opts->list->desc;
|
|
|
|
opt = g_malloc0(sizeof(*opt));
|
|
opt->desc = find_desc_by_name(desc, name);
|
|
if (!opt->desc && !opts_accepts_any(opts)) {
|
|
error_setg(errp, QERR_INVALID_PARAMETER, name);
|
|
g_free(opt);
|
|
return;
|
|
}
|
|
|
|
opt->name = g_strdup(name);
|
|
opt->opts = opts;
|
|
opt->value.boolean = !!val;
|
|
opt->str = g_strdup(val ? "on" : "off");
|
|
QTAILQ_INSERT_TAIL(&opts->head, opt, next);
|
|
}
|
|
|
|
void qemu_opt_set_number(QemuOpts *opts, const char *name, int64_t val,
|
|
Error **errp)
|
|
{
|
|
QemuOpt *opt;
|
|
const QemuOptDesc *desc = opts->list->desc;
|
|
|
|
opt = g_malloc0(sizeof(*opt));
|
|
opt->desc = find_desc_by_name(desc, name);
|
|
if (!opt->desc && !opts_accepts_any(opts)) {
|
|
error_setg(errp, QERR_INVALID_PARAMETER, name);
|
|
g_free(opt);
|
|
return;
|
|
}
|
|
|
|
opt->name = g_strdup(name);
|
|
opt->opts = opts;
|
|
opt->value.uint = val;
|
|
opt->str = g_strdup_printf("%" PRId64, val);
|
|
QTAILQ_INSERT_TAIL(&opts->head, opt, next);
|
|
}
|
|
|
|
/**
|
|
* For each member of @opts, call @func(@opaque, name, value, @errp).
|
|
* @func() may store an Error through @errp, but must return non-zero then.
|
|
* When @func() returns non-zero, break the loop and return that value.
|
|
* Return zero when the loop completes.
|
|
*/
|
|
int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque,
|
|
Error **errp)
|
|
{
|
|
QemuOpt *opt;
|
|
int rc;
|
|
|
|
QTAILQ_FOREACH(opt, &opts->head, next) {
|
|
rc = func(opaque, opt->name, opt->str, errp);
|
|
if (rc) {
|
|
return rc;
|
|
}
|
|
assert(!errp || !*errp);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id)
|
|
{
|
|
QemuOpts *opts;
|
|
|
|
QTAILQ_FOREACH(opts, &list->head, next) {
|
|
if (!opts->id && !id) {
|
|
return opts;
|
|
}
|
|
if (opts->id && id && !strcmp(opts->id, id)) {
|
|
return opts;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
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_setg(errp, QERR_INVALID_PARAMETER_VALUE, "id",
|
|
"an identifier");
|
|
error_append_hint(errp, "Identifiers consist of letters, digits, "
|
|
"'-', '.', '_', starting with a letter.");
|
|
return NULL;
|
|
}
|
|
opts = qemu_opts_find(list, id);
|
|
if (opts != NULL) {
|
|
if (fail_if_exists && !list->merge_lists) {
|
|
error_setg(errp, "Duplicate ID '%s' for %s", 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));
|
|
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);
|
|
}
|
|
|
|
void qemu_opts_set(QemuOptsList *list, const char *id,
|
|
const char *name, const char *value, Error **errp)
|
|
{
|
|
QemuOpts *opts;
|
|
Error *local_err = NULL;
|
|
|
|
opts = qemu_opts_create(list, id, 1, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
qemu_opt_set(opts, name, value, errp);
|
|
}
|
|
|
|
const char *qemu_opts_id(QemuOpts *opts)
|
|
{
|
|
return opts->id;
|
|
}
|
|
|
|
/* The id string will be g_free()d by qemu_opts_del */
|
|
void qemu_opts_set_id(QemuOpts *opts, char *id)
|
|
{
|
|
opts->id = id;
|
|
}
|
|
|
|
void qemu_opts_del(QemuOpts *opts)
|
|
{
|
|
QemuOpt *opt;
|
|
|
|
if (opts == NULL) {
|
|
return;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
/* print value, escaping any commas in value */
|
|
static void escaped_print(const char *value)
|
|
{
|
|
const char *ptr;
|
|
|
|
for (ptr = value; *ptr; ++ptr) {
|
|
if (*ptr == ',') {
|
|
putchar(',');
|
|
}
|
|
putchar(*ptr);
|
|
}
|
|
}
|
|
|
|
void qemu_opts_print(QemuOpts *opts, const char *separator)
|
|
{
|
|
QemuOpt *opt;
|
|
QemuOptDesc *desc = opts->list->desc;
|
|
const char *sep = "";
|
|
|
|
if (opts->id) {
|
|
printf("id=%s", opts->id); /* passed id_wellformed -> no commas */
|
|
sep = separator;
|
|
}
|
|
|
|
if (desc[0].name == NULL) {
|
|
QTAILQ_FOREACH(opt, &opts->head, next) {
|
|
printf("%s%s=", sep, opt->name);
|
|
escaped_print(opt->str);
|
|
sep = separator;
|
|
}
|
|
return;
|
|
}
|
|
for (; desc && desc->name; desc++) {
|
|
const char *value;
|
|
QemuOpt *opt = qemu_opt_find(opts, desc->name);
|
|
|
|
value = opt ? opt->str : desc->def_value_str;
|
|
if (!value) {
|
|
continue;
|
|
}
|
|
if (desc->type == QEMU_OPT_STRING) {
|
|
printf("%s%s=", sep, desc->name);
|
|
escaped_print(value);
|
|
} else if ((desc->type == QEMU_OPT_SIZE ||
|
|
desc->type == QEMU_OPT_NUMBER) && opt) {
|
|
printf("%s%s=%" PRId64, sep, desc->name, opt->value.uint);
|
|
} else {
|
|
printf("%s%s=%s", sep, desc->name, value);
|
|
}
|
|
sep = separator;
|
|
}
|
|
}
|
|
|
|
static void opts_do_parse(QemuOpts *opts, const char *params,
|
|
const char *firstname, bool prepend, Error **errp)
|
|
{
|
|
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 (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
}
|
|
if (*p != ',') {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Store options parsed from @params into @opts.
|
|
* If @firstname is non-null, the first key=value in @params may omit
|
|
* key=, and is treated as if key was @firstname.
|
|
* On error, store an error object through @errp if non-null.
|
|
*/
|
|
void qemu_opts_do_parse(QemuOpts *opts, const char *params,
|
|
const char *firstname, Error **errp)
|
|
{
|
|
opts_do_parse(opts, params, firstname, false, errp);
|
|
}
|
|
|
|
static QemuOpts *opts_parse(QemuOptsList *list, const char *params,
|
|
bool permit_abbrev, bool defaults, Error **errp)
|
|
{
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* This code doesn't work for defaults && !list->merge_lists: when
|
|
* params has no id=, and list has an element with !opts->id, it
|
|
* appends a new element instead of returning the existing opts.
|
|
* However, we got no use for this case. Guard against possible
|
|
* (if unlikely) future misuse:
|
|
*/
|
|
assert(!defaults || list->merge_lists);
|
|
opts = qemu_opts_create(list, id, !defaults, &local_err);
|
|
if (opts == NULL) {
|
|
error_propagate(errp, local_err);
|
|
return NULL;
|
|
}
|
|
|
|
opts_do_parse(opts, params, firstname, defaults, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
qemu_opts_del(opts);
|
|
return NULL;
|
|
}
|
|
|
|
return opts;
|
|
}
|
|
|
|
/**
|
|
* Create a QemuOpts in @list and with options parsed from @params.
|
|
* If @permit_abbrev, the first key=value in @params may omit key=,
|
|
* and is treated as if key was @list->implied_opt_name.
|
|
* On error, store an error object through @errp if non-null.
|
|
* Return the new QemuOpts on success, null pointer on error.
|
|
*/
|
|
QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params,
|
|
bool permit_abbrev, Error **errp)
|
|
{
|
|
return opts_parse(list, params, permit_abbrev, false, errp);
|
|
}
|
|
|
|
/**
|
|
* Create a QemuOpts in @list and with options parsed from @params.
|
|
* If @permit_abbrev, the first key=value in @params may omit key=,
|
|
* and is treated as if key was @list->implied_opt_name.
|
|
* Report errors with error_report_err(). This is inappropriate in
|
|
* QMP context. Do not use this function there!
|
|
* Return the new QemuOpts on success, null pointer on error.
|
|
*/
|
|
QemuOpts *qemu_opts_parse_noisily(QemuOptsList *list, const char *params,
|
|
bool permit_abbrev)
|
|
{
|
|
Error *err = NULL;
|
|
QemuOpts *opts;
|
|
|
|
opts = opts_parse(list, params, permit_abbrev, false, &err);
|
|
if (err) {
|
|
error_report_err(err);
|
|
}
|
|
return opts;
|
|
}
|
|
|
|
void qemu_opts_set_defaults(QemuOptsList *list, const char *params,
|
|
int permit_abbrev)
|
|
{
|
|
QemuOpts *opts;
|
|
|
|
opts = opts_parse(list, params, permit_abbrev, true, NULL);
|
|
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") || *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_bool(qobject_to_qbool(obj)) ? "on" : "off");
|
|
value = buf;
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
|
|
qemu_opt_set(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 (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 (local_err) {
|
|
error_propagate(errp, local_err);
|
|
qemu_opts_del(opts);
|
|
return NULL;
|
|
}
|
|
|
|
return opts;
|
|
}
|
|
|
|
/*
|
|
* Adds all QDict entries to the QemuOpts that can be added and removes them
|
|
* from the QDict. When this function returns, the QDict contains only those
|
|
* entries that couldn't be added to the QemuOpts.
|
|
*/
|
|
void qemu_opts_absorb_qdict(QemuOpts *opts, QDict *qdict, Error **errp)
|
|
{
|
|
const QDictEntry *entry, *next;
|
|
|
|
entry = qdict_first(qdict);
|
|
|
|
while (entry != NULL) {
|
|
Error *local_err = NULL;
|
|
OptsFromQDictState state = {
|
|
.errp = &local_err,
|
|
.opts = opts,
|
|
};
|
|
|
|
next = qdict_next(qdict, entry);
|
|
|
|
if (find_desc_by_name(opts->list->desc, entry->key)) {
|
|
qemu_opts_from_qdict_1(entry->key, entry->value, &state);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
} else {
|
|
qdict_del(qdict, entry->key);
|
|
}
|
|
}
|
|
|
|
entry = next;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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_accepts_any(opts));
|
|
|
|
QTAILQ_FOREACH(opt, &opts->head, next) {
|
|
opt->desc = find_desc_by_name(desc, opt->name);
|
|
if (!opt->desc) {
|
|
error_setg(errp, QERR_INVALID_PARAMETER, opt->name);
|
|
return;
|
|
}
|
|
|
|
qemu_opt_parse(opt, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* For each member of @list, call @func(@opaque, member, @errp).
|
|
* Call it with the current location temporarily set to the member's.
|
|
* @func() may store an Error through @errp, but must return non-zero then.
|
|
* When @func() returns non-zero, break the loop and return that value.
|
|
* Return zero when the loop completes.
|
|
*/
|
|
int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func,
|
|
void *opaque, Error **errp)
|
|
{
|
|
Location loc;
|
|
QemuOpts *opts;
|
|
int rc;
|
|
|
|
loc_push_none(&loc);
|
|
QTAILQ_FOREACH(opts, &list->head, next) {
|
|
loc_restore(&opts->loc);
|
|
rc = func(opaque, opts, errp);
|
|
if (rc) {
|
|
return rc;
|
|
}
|
|
assert(!errp || !*errp);
|
|
}
|
|
loc_pop(&loc);
|
|
return 0;
|
|
}
|
|
|
|
static size_t count_opts_list(QemuOptsList *list)
|
|
{
|
|
QemuOptDesc *desc = NULL;
|
|
size_t num_opts = 0;
|
|
|
|
if (!list) {
|
|
return 0;
|
|
}
|
|
|
|
desc = list->desc;
|
|
while (desc && desc->name) {
|
|
num_opts++;
|
|
desc++;
|
|
}
|
|
|
|
return num_opts;
|
|
}
|
|
|
|
void qemu_opts_free(QemuOptsList *list)
|
|
{
|
|
g_free(list);
|
|
}
|
|
|
|
/* Realloc dst option list and append options from an option list (list)
|
|
* to it. dst could be NULL or a malloced list.
|
|
* The lifetime of dst must be shorter than the input list because the
|
|
* QemuOptDesc->name, ->help, and ->def_value_str strings are shared.
|
|
*/
|
|
QemuOptsList *qemu_opts_append(QemuOptsList *dst,
|
|
QemuOptsList *list)
|
|
{
|
|
size_t num_opts, num_dst_opts;
|
|
QemuOptDesc *desc;
|
|
bool need_init = false;
|
|
bool need_head_update;
|
|
|
|
if (!list) {
|
|
return dst;
|
|
}
|
|
|
|
/* If dst is NULL, after realloc, some area of dst should be initialized
|
|
* before adding options to it.
|
|
*/
|
|
if (!dst) {
|
|
need_init = true;
|
|
need_head_update = true;
|
|
} else {
|
|
/* Moreover, even if dst is not NULL, the realloc may move it to a
|
|
* different address in which case we may get a stale tail pointer
|
|
* in dst->head. */
|
|
need_head_update = QTAILQ_EMPTY(&dst->head);
|
|
}
|
|
|
|
num_opts = count_opts_list(dst);
|
|
num_dst_opts = num_opts;
|
|
num_opts += count_opts_list(list);
|
|
dst = g_realloc(dst, sizeof(QemuOptsList) +
|
|
(num_opts + 1) * sizeof(QemuOptDesc));
|
|
if (need_init) {
|
|
dst->name = NULL;
|
|
dst->implied_opt_name = NULL;
|
|
dst->merge_lists = false;
|
|
}
|
|
if (need_head_update) {
|
|
QTAILQ_INIT(&dst->head);
|
|
}
|
|
dst->desc[num_dst_opts].name = NULL;
|
|
|
|
/* append list->desc to dst->desc */
|
|
if (list) {
|
|
desc = list->desc;
|
|
while (desc && desc->name) {
|
|
if (find_desc_by_name(dst->desc, desc->name) == NULL) {
|
|
dst->desc[num_dst_opts++] = *desc;
|
|
dst->desc[num_dst_opts].name = NULL;
|
|
}
|
|
desc++;
|
|
}
|
|
}
|
|
|
|
return dst;
|
|
}
|