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1 | #include "qemu-common.h" | |
2 | #include "qemu/error-report.h" | |
3 | #include "qemu/option.h" | |
4 | #include "qemu/config-file.h" | |
5 | #include "qapi/qmp/qerror.h" | |
6 | #include "hw/qdev.h" | |
7 | #include "qapi/error.h" | |
8 | #include "qmp-commands.h" | |
9 | ||
10 | static QemuOptsList *vm_config_groups[32]; | |
11 | ||
12 | static QemuOptsList *find_list(QemuOptsList **lists, const char *group, | |
13 | Error **errp) | |
14 | { | |
15 | int i; | |
16 | ||
17 | for (i = 0; lists[i] != NULL; i++) { | |
18 | if (strcmp(lists[i]->name, group) == 0) | |
19 | break; | |
20 | } | |
21 | if (lists[i] == NULL) { | |
22 | error_set(errp, QERR_INVALID_OPTION_GROUP, group); | |
23 | } | |
24 | return lists[i]; | |
25 | } | |
26 | ||
27 | QemuOptsList *qemu_find_opts(const char *group) | |
28 | { | |
29 | QemuOptsList *ret; | |
30 | Error *local_err = NULL; | |
31 | ||
32 | ret = find_list(vm_config_groups, group, &local_err); | |
33 | if (error_is_set(&local_err)) { | |
34 | error_report("%s", error_get_pretty(local_err)); | |
35 | error_free(local_err); | |
36 | } | |
37 | ||
38 | return ret; | |
39 | } | |
40 | ||
41 | static CommandLineParameterInfoList *query_option_descs(const QemuOptDesc *desc) | |
42 | { | |
43 | CommandLineParameterInfoList *param_list = NULL, *entry; | |
44 | CommandLineParameterInfo *info; | |
45 | int i; | |
46 | ||
47 | for (i = 0; desc[i].name != NULL; i++) { | |
48 | info = g_malloc0(sizeof(*info)); | |
49 | info->name = g_strdup(desc[i].name); | |
50 | ||
51 | switch (desc[i].type) { | |
52 | case QEMU_OPT_STRING: | |
53 | info->type = COMMAND_LINE_PARAMETER_TYPE_STRING; | |
54 | break; | |
55 | case QEMU_OPT_BOOL: | |
56 | info->type = COMMAND_LINE_PARAMETER_TYPE_BOOLEAN; | |
57 | break; | |
58 | case QEMU_OPT_NUMBER: | |
59 | info->type = COMMAND_LINE_PARAMETER_TYPE_NUMBER; | |
60 | break; | |
61 | case QEMU_OPT_SIZE: | |
62 | info->type = COMMAND_LINE_PARAMETER_TYPE_SIZE; | |
63 | break; | |
64 | } | |
65 | ||
66 | if (desc[i].help) { | |
67 | info->has_help = true; | |
68 | info->help = g_strdup(desc[i].help); | |
69 | } | |
70 | ||
71 | entry = g_malloc0(sizeof(*entry)); | |
72 | entry->value = info; | |
73 | entry->next = param_list; | |
74 | param_list = entry; | |
75 | } | |
76 | ||
77 | return param_list; | |
78 | } | |
79 | ||
80 | CommandLineOptionInfoList *qmp_query_command_line_options(bool has_option, | |
81 | const char *option, | |
82 | Error **errp) | |
83 | { | |
84 | CommandLineOptionInfoList *conf_list = NULL, *entry; | |
85 | CommandLineOptionInfo *info; | |
86 | int i; | |
87 | ||
88 | for (i = 0; vm_config_groups[i] != NULL; i++) { | |
89 | if (!has_option || !strcmp(option, vm_config_groups[i]->name)) { | |
90 | info = g_malloc0(sizeof(*info)); | |
91 | info->option = g_strdup(vm_config_groups[i]->name); | |
92 | info->parameters = query_option_descs(vm_config_groups[i]->desc); | |
93 | entry = g_malloc0(sizeof(*entry)); | |
94 | entry->value = info; | |
95 | entry->next = conf_list; | |
96 | conf_list = entry; | |
97 | } | |
98 | } | |
99 | ||
100 | if (conf_list == NULL) { | |
101 | error_setg(errp, "invalid option name: %s", option); | |
102 | } | |
103 | ||
104 | return conf_list; | |
105 | } | |
106 | ||
107 | QemuOptsList *qemu_find_opts_err(const char *group, Error **errp) | |
108 | { | |
109 | return find_list(vm_config_groups, group, errp); | |
110 | } | |
111 | ||
112 | void qemu_add_opts(QemuOptsList *list) | |
113 | { | |
114 | int entries, i; | |
115 | ||
116 | entries = ARRAY_SIZE(vm_config_groups); | |
117 | entries--; /* keep list NULL terminated */ | |
118 | for (i = 0; i < entries; i++) { | |
119 | if (vm_config_groups[i] == NULL) { | |
120 | vm_config_groups[i] = list; | |
121 | return; | |
122 | } | |
123 | } | |
124 | fprintf(stderr, "ran out of space in vm_config_groups"); | |
125 | abort(); | |
126 | } | |
127 | ||
128 | int qemu_set_option(const char *str) | |
129 | { | |
130 | char group[64], id[64], arg[64]; | |
131 | QemuOptsList *list; | |
132 | QemuOpts *opts; | |
133 | int rc, offset; | |
134 | ||
135 | rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset); | |
136 | if (rc < 3 || str[offset] != '=') { | |
137 | error_report("can't parse: \"%s\"", str); | |
138 | return -1; | |
139 | } | |
140 | ||
141 | list = qemu_find_opts(group); | |
142 | if (list == NULL) { | |
143 | return -1; | |
144 | } | |
145 | ||
146 | opts = qemu_opts_find(list, id); | |
147 | if (!opts) { | |
148 | error_report("there is no %s \"%s\" defined", | |
149 | list->name, id); | |
150 | return -1; | |
151 | } | |
152 | ||
153 | if (qemu_opt_set(opts, arg, str+offset+1) == -1) { | |
154 | return -1; | |
155 | } | |
156 | return 0; | |
157 | } | |
158 | ||
159 | struct ConfigWriteData { | |
160 | QemuOptsList *list; | |
161 | FILE *fp; | |
162 | }; | |
163 | ||
164 | static int config_write_opt(const char *name, const char *value, void *opaque) | |
165 | { | |
166 | struct ConfigWriteData *data = opaque; | |
167 | ||
168 | fprintf(data->fp, " %s = \"%s\"\n", name, value); | |
169 | return 0; | |
170 | } | |
171 | ||
172 | static int config_write_opts(QemuOpts *opts, void *opaque) | |
173 | { | |
174 | struct ConfigWriteData *data = opaque; | |
175 | const char *id = qemu_opts_id(opts); | |
176 | ||
177 | if (id) { | |
178 | fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id); | |
179 | } else { | |
180 | fprintf(data->fp, "[%s]\n", data->list->name); | |
181 | } | |
182 | qemu_opt_foreach(opts, config_write_opt, data, 0); | |
183 | fprintf(data->fp, "\n"); | |
184 | return 0; | |
185 | } | |
186 | ||
187 | void qemu_config_write(FILE *fp) | |
188 | { | |
189 | struct ConfigWriteData data = { .fp = fp }; | |
190 | QemuOptsList **lists = vm_config_groups; | |
191 | int i; | |
192 | ||
193 | fprintf(fp, "# qemu config file\n\n"); | |
194 | for (i = 0; lists[i] != NULL; i++) { | |
195 | data.list = lists[i]; | |
196 | qemu_opts_foreach(data.list, config_write_opts, &data, 0); | |
197 | } | |
198 | } | |
199 | ||
200 | int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname) | |
201 | { | |
202 | char line[1024], group[64], id[64], arg[64], value[1024]; | |
203 | Location loc; | |
204 | QemuOptsList *list = NULL; | |
205 | Error *local_err = NULL; | |
206 | QemuOpts *opts = NULL; | |
207 | int res = -1, lno = 0; | |
208 | ||
209 | loc_push_none(&loc); | |
210 | while (fgets(line, sizeof(line), fp) != NULL) { | |
211 | loc_set_file(fname, ++lno); | |
212 | if (line[0] == '\n') { | |
213 | /* skip empty lines */ | |
214 | continue; | |
215 | } | |
216 | if (line[0] == '#') { | |
217 | /* comment */ | |
218 | continue; | |
219 | } | |
220 | if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) { | |
221 | /* group with id */ | |
222 | list = find_list(lists, group, &local_err); | |
223 | if (error_is_set(&local_err)) { | |
224 | error_report("%s", error_get_pretty(local_err)); | |
225 | error_free(local_err); | |
226 | goto out; | |
227 | } | |
228 | opts = qemu_opts_create(list, id, 1, NULL); | |
229 | continue; | |
230 | } | |
231 | if (sscanf(line, "[%63[^]]]", group) == 1) { | |
232 | /* group without id */ | |
233 | list = find_list(lists, group, &local_err); | |
234 | if (error_is_set(&local_err)) { | |
235 | error_report("%s", error_get_pretty(local_err)); | |
236 | error_free(local_err); | |
237 | goto out; | |
238 | } | |
239 | opts = qemu_opts_create_nofail(list); | |
240 | continue; | |
241 | } | |
242 | if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) { | |
243 | /* arg = value */ | |
244 | if (opts == NULL) { | |
245 | error_report("no group defined"); | |
246 | goto out; | |
247 | } | |
248 | if (qemu_opt_set(opts, arg, value) != 0) { | |
249 | goto out; | |
250 | } | |
251 | continue; | |
252 | } | |
253 | error_report("parse error"); | |
254 | goto out; | |
255 | } | |
256 | if (ferror(fp)) { | |
257 | error_report("error reading file"); | |
258 | goto out; | |
259 | } | |
260 | res = 0; | |
261 | out: | |
262 | loc_pop(&loc); | |
263 | return res; | |
264 | } | |
265 | ||
266 | int qemu_read_config_file(const char *filename) | |
267 | { | |
268 | FILE *f = fopen(filename, "r"); | |
269 | int ret; | |
270 | ||
271 | if (f == NULL) { | |
272 | return -errno; | |
273 | } | |
274 | ||
275 | ret = qemu_config_parse(f, vm_config_groups, filename); | |
276 | fclose(f); | |
277 | ||
278 | if (ret == 0) { | |
279 | return 0; | |
280 | } else { | |
281 | return -EINVAL; | |
282 | } | |
283 | } |