Crashes when the first list member has an ID. Admittedly nonsensical reproducer: $ qemu-system-x86_64 -nodefaults -machine id=foo -machine "" Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1372943363-24081-2-git-send-email-armbru@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
1135 lines
29 KiB
C
1135 lines
29 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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/*
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* Searches an option list for an option with the given name
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*/
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QEMUOptionParameter *get_option_parameter(QEMUOptionParameter *list,
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const char *name)
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{
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while (list && list->name) {
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if (!strcmp(list->name, name)) {
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return list;
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}
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list++;
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}
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return NULL;
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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_set(errp,QERR_INVALID_PARAMETER_VALUE, 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_set(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_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a number");
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}
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}
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static 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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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_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a size");
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#if 0 /* conversion from qerror_report() to error_set() broke this: */
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error_printf_unless_qmp("You may use k, M, G or T suffixes for "
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"kilobytes, megabytes, gigabytes and terabytes.\n");
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#endif
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return;
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}
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} else {
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error_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a size");
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}
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}
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/*
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* Sets the value of a parameter in a given option list. The parsing of the
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* value depends on the type of option:
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*
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* OPT_FLAG (uses value.n):
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* If no value is given, the flag is set to 1.
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* Otherwise the value must be "on" (set to 1) or "off" (set to 0)
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*
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* OPT_STRING (uses value.s):
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* value is strdup()ed and assigned as option value
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*
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* OPT_SIZE (uses value.n):
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* The value is converted to an integer. Suffixes for kilobytes etc. are
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* allowed (powers of 1024).
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*
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* Returns 0 on succes, -1 in error cases
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*/
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int set_option_parameter(QEMUOptionParameter *list, const char *name,
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const char *value)
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{
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bool flag;
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Error *local_err = NULL;
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// Find a matching parameter
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list = get_option_parameter(list, name);
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if (list == NULL) {
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fprintf(stderr, "Unknown option '%s'\n", name);
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return -1;
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}
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// Process parameter
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switch (list->type) {
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case OPT_FLAG:
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parse_option_bool(name, value, &flag, &local_err);
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if (!error_is_set(&local_err)) {
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list->value.n = flag;
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}
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break;
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case OPT_STRING:
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if (value != NULL) {
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list->value.s = g_strdup(value);
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} else {
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fprintf(stderr, "Option '%s' needs a parameter\n", name);
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return -1;
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}
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break;
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case OPT_SIZE:
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parse_option_size(name, value, &list->value.n, &local_err);
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break;
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default:
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fprintf(stderr, "Bug: Option '%s' has an unknown type\n", name);
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return -1;
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}
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if (error_is_set(&local_err)) {
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qerror_report_err(local_err);
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error_free(local_err);
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return -1;
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}
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return 0;
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}
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/*
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* Sets the given parameter to an integer instead of a string.
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* This function cannot be used to set string options.
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*
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* Returns 0 on success, -1 in error cases
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*/
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int set_option_parameter_int(QEMUOptionParameter *list, const char *name,
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uint64_t value)
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{
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// Find a matching parameter
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list = get_option_parameter(list, name);
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if (list == NULL) {
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fprintf(stderr, "Unknown option '%s'\n", name);
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return -1;
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}
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// Process parameter
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switch (list->type) {
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case OPT_FLAG:
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case OPT_NUMBER:
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case OPT_SIZE:
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list->value.n = value;
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break;
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default:
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return -1;
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}
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return 0;
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}
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/*
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* Frees a option list. If it contains strings, the strings are freed as well.
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*/
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void free_option_parameters(QEMUOptionParameter *list)
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{
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QEMUOptionParameter *cur = list;
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while (cur && cur->name) {
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if (cur->type == OPT_STRING) {
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g_free(cur->value.s);
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}
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cur++;
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}
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g_free(list);
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}
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|
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/*
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* Count valid options in list
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*/
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static size_t count_option_parameters(QEMUOptionParameter *list)
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{
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size_t num_options = 0;
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while (list && list->name) {
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num_options++;
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list++;
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}
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return num_options;
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}
|
|
|
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/*
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* Append an option list (list) to an option list (dest).
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*
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* If dest is NULL, a new copy of list is created.
|
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*
|
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* Returns a pointer to the first element of dest (or the newly allocated copy)
|
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*/
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QEMUOptionParameter *append_option_parameters(QEMUOptionParameter *dest,
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QEMUOptionParameter *list)
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{
|
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size_t num_options, num_dest_options;
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|
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num_options = count_option_parameters(dest);
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num_dest_options = num_options;
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|
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num_options += count_option_parameters(list);
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|
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dest = g_realloc(dest, (num_options + 1) * sizeof(QEMUOptionParameter));
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dest[num_dest_options].name = NULL;
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|
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while (list && list->name) {
|
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if (get_option_parameter(dest, list->name) == NULL) {
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dest[num_dest_options++] = *list;
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dest[num_dest_options].name = NULL;
|
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}
|
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list++;
|
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}
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|
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return dest;
|
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}
|
|
|
|
/*
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|
* Parses a parameter string (param) into an option list (dest).
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*
|
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* list is the template option list. If dest is NULL, a new copy of list is
|
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* created. If list is NULL, this function fails.
|
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*
|
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* A parameter string consists of one or more parameters, separated by commas.
|
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* Each parameter consists of its name and possibly of a value. In the latter
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* case, the value is delimited by an = character. To specify a value which
|
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* contains commas, double each comma so it won't be recognized as the end of
|
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* the parameter.
|
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*
|
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* For more details of the parsing see above.
|
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*
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* Returns a pointer to the first element of dest (or the newly allocated copy)
|
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* or NULL in error cases
|
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*/
|
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QEMUOptionParameter *parse_option_parameters(const char *param,
|
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QEMUOptionParameter *list, QEMUOptionParameter *dest)
|
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{
|
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QEMUOptionParameter *allocated = NULL;
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char name[256];
|
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char value[256];
|
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char *param_delim, *value_delim;
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char next_delim;
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|
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if (list == NULL) {
|
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return NULL;
|
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}
|
|
|
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if (dest == NULL) {
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dest = allocated = append_option_parameters(NULL, list);
|
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}
|
|
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while (*param) {
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|
|
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// Find parameter name and value in the string
|
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param_delim = strchr(param, ',');
|
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value_delim = strchr(param, '=');
|
|
|
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if (value_delim && (value_delim < param_delim || !param_delim)) {
|
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next_delim = '=';
|
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} else {
|
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next_delim = ',';
|
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value_delim = NULL;
|
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}
|
|
|
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param = get_opt_name(name, sizeof(name), param, next_delim);
|
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if (value_delim) {
|
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param = get_opt_value(value, sizeof(value), param + 1);
|
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}
|
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if (*param != '\0') {
|
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param++;
|
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}
|
|
|
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// Set the parameter
|
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if (set_option_parameter(dest, name, value_delim ? value : NULL)) {
|
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goto fail;
|
|
}
|
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}
|
|
|
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return dest;
|
|
|
|
fail:
|
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// Only free the list if it was newly allocated
|
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free_option_parameters(allocated);
|
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return NULL;
|
|
}
|
|
|
|
/*
|
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* Prints all options of a list that have a value to stdout
|
|
*/
|
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void print_option_parameters(QEMUOptionParameter *list)
|
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{
|
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while (list && list->name) {
|
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switch (list->type) {
|
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case OPT_STRING:
|
|
if (list->value.s != NULL) {
|
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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_has_help_opt(QemuOpts *opts)
|
|
{
|
|
QemuOpt *opt;
|
|
|
|
QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) {
|
|
if (is_help_option(opt->name)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
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 bool opts_accepts_any(const QemuOpts *opts)
|
|
{
|
|
return opts->list->desc[0].name == NULL;
|
|
}
|
|
|
|
static const QemuOptDesc *find_desc_by_name(const QemuOptDesc *desc,
|
|
const char *name)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; desc[i].name != NULL; i++) {
|
|
if (strcmp(desc[i].name, name) == 0) {
|
|
return &desc[i];
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
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_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);
|
|
}
|
|
opt->desc = desc;
|
|
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;
|
|
|
|
opt = g_malloc0(sizeof(*opt));
|
|
opt->desc = find_desc_by_name(desc, name);
|
|
if (!opt->desc && !opts_accepts_any(opts)) {
|
|
qerror_report(QERR_INVALID_PARAMETER, name);
|
|
g_free(opt);
|
|
return -1;
|
|
}
|
|
|
|
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);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int qemu_opt_set_number(QemuOpts *opts, const char *name, int64_t val)
|
|
{
|
|
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)) {
|
|
qerror_report(QERR_INVALID_PARAMETER, name);
|
|
g_free(opt);
|
|
return -1;
|
|
}
|
|
|
|
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);
|
|
|
|
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 && !id) {
|
|
return opts;
|
|
}
|
|
if (opts->id && id && !strcmp(opts->id, id)) {
|
|
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");
|
|
#if 0 /* conversion from qerror_report() to error_set() broke this: */
|
|
error_printf_unless_qmp("Identifiers consist of letters, digits, '-', '.', '_', starting with a letter.\n");
|
|
#endif
|
|
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));
|
|
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;
|
|
}
|
|
|
|
QemuOpts *qemu_opts_create_nofail(QemuOptsList *list)
|
|
{
|
|
QemuOpts *opts;
|
|
Error *errp = NULL;
|
|
opts = qemu_opts_create(list, NULL, 0, &errp);
|
|
assert_no_error(errp);
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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 (error_is_set(&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_set(errp, QERR_INVALID_PARAMETER, opt->name);
|
|
return;
|
|
}
|
|
|
|
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;
|
|
}
|