ui/ncurses: Fix boot editor segfault on update
[petitboot] / discover / yaboot-parser.c
1 #if defined(HAVE_CONFIG_H)
2 #include "config.h"
3 #endif
4
5 #include <assert.h>
6 #include <stdlib.h>
7 #include <string.h>
8 #include <ctype.h>
9 #include <i18n/i18n.h>
10
11 #include "log/log.h"
12 #include "talloc/talloc.h"
13 #include "types/types.h"
14 #include "parser-conf.h"
15 #include "parser-utils.h"
16 #include "resource.h"
17
18 struct yaboot_state {
19         int globals_done;
20
21         /* current option data */
22         struct discover_boot_option *opt;
23         const char *device;
24         const char *partition;
25         const char *boot_image;
26         const char *initrd;
27         const char *initrd_size;
28         const char *literal;
29         const char *ramdisk;
30         const char *root;
31         bool read_only;
32         bool read_write;
33 };
34
35 static struct discover_boot_option *state_start_new_option(
36                 struct conf_context *conf,
37                 struct yaboot_state *state)
38 {
39         state->opt = discover_boot_option_create(conf->dc, conf->dc->device);
40         state->opt->option->boot_args = talloc_strdup(state->opt->option, "");
41
42         /* old allocated values will get freed with the state */
43         state->device = conf_get_global_option(conf, "device");
44         state->partition = conf_get_global_option(conf, "partition");
45         state->initrd_size = conf_get_global_option(conf, "initrd_size");
46         state->literal = conf_get_global_option(conf, "literal");
47         state->ramdisk = conf_get_global_option(conf, "ramdisk");
48         state->root = conf_get_global_option(conf, "root");
49
50         return state->opt;
51 }
52
53 static struct resource *create_yaboot_devpath_resource(
54                 struct yaboot_state *state,
55                 struct conf_context *conf,
56                 const char *path)
57 {
58         struct discover_boot_option *opt = state->opt;
59         const char *dev, *part, *devpos;
60         struct resource *res;
61         char *devpath, *devstr;
62
63         dev = state->device;
64         part = state->partition;
65
66         if (!dev)
67                 dev = conf_get_global_option(conf, "device");
68         if (!part)
69                 part = conf_get_global_option(conf, "partition");
70
71         if (strchr(path, ':')) {
72                 devpath = talloc_strdup(conf, path);
73
74         } else if (dev && part) {
75                 devpos = &dev[strlen(dev) - 1];
76                 if (isdigit(*devpos)) {
77                         while (isdigit(*devpos))
78                                 devpos--;
79
80                         devstr = talloc_strndup(conf, dev, devpos - dev + 1);
81                         devpath = talloc_asprintf(conf, "%s%s:%s", devstr,
82                                         part, path);
83                         talloc_free(devstr);
84                 } else {
85                         devpath = talloc_asprintf(conf,
86                                         "%s%s:%s", dev, part, path);
87                 }
88         } else if (dev) {
89                 devpath = talloc_asprintf(conf, "%s:%s", dev, path);
90         } else {
91                 devpath = talloc_strdup(conf, path);
92         }
93
94         res = create_devpath_resource(opt, conf->dc->device, devpath);
95
96         talloc_free(devpath);
97
98         return res;
99 }
100
101 static void yaboot_finish(struct conf_context *conf)
102 {
103         struct yaboot_state *state = conf->parser_info;
104         const char *default_label;
105         struct boot_option *opt;
106
107         if (!state->opt)
108                 return;
109
110         opt = state->opt->option;
111         assert(opt);
112         assert(opt->name);
113         assert(opt->boot_args);
114
115         /* populate the boot option from state data */
116         state->opt->boot_image = create_yaboot_devpath_resource(state,
117                                 conf, state->boot_image);
118
119         char* args_sigfile_default = talloc_asprintf(opt,
120                 "%s.cmdline.sig", state->boot_image);
121         state->opt->args_sig_file = create_yaboot_devpath_resource(state,
122                                 conf, args_sigfile_default);
123         talloc_free(args_sigfile_default);
124
125         if (state->initrd) {
126                 state->opt->initrd = create_yaboot_devpath_resource(state,
127                                 conf, state->initrd);
128         }
129
130         if (state->initrd_size) {
131                 opt->boot_args = talloc_asprintf(opt, "ramdisk_size=%s %s",
132                                         state->initrd_size, opt->boot_args);
133         }
134
135         if (state->ramdisk) {
136                 opt->boot_args = talloc_asprintf(opt, "ramdisk=%s %s",
137                                         state->initrd_size, opt->boot_args);
138         }
139
140         if (state->root) {
141                 opt->boot_args = talloc_asprintf(opt, "root=%s %s",
142                                         state->root, opt->boot_args);
143         }
144
145         if (state->read_only && state->read_write) {
146                 pb_log("boot option %s specified both 'ro' and 'rw', "
147                                 "using 'rw'\n", opt->name);
148                 state->read_only = false;
149         }
150
151         if (state->read_only || state->read_write) {
152                 opt->boot_args = talloc_asprintf(opt, "%s %s",
153                                         state->read_only ? "ro" : "rw",
154                                         opt->boot_args);
155         }
156
157         if (state->literal) {
158                 opt->boot_args = talloc_strdup(opt, state->literal);
159         }
160
161         opt->description = talloc_asprintf(opt, "%s %s %s",
162                 state->boot_image,
163                 (state->initrd ? state->initrd : ""),
164                 opt->boot_args ? opt->boot_args : "");
165
166         conf_strip_str(opt->boot_args);
167         conf_strip_str(opt->description);
168
169         default_label = conf_get_global_option(conf, "default");
170         if (default_label &&
171                         !strcasecmp(state->opt->option->name, default_label))
172                 state->opt->option->is_default = true;
173
174         discover_context_add_boot_option(conf->dc, state->opt);
175 }
176
177 static void yaboot_process_pair(struct conf_context *conf, const char *name,
178                 char *value)
179 {
180         struct yaboot_state *state = conf->parser_info;
181         struct discover_boot_option *opt = state->opt;
182         struct fixed_pair {
183                 const char *image;
184                 const char *initrd;
185         };
186         static const struct fixed_pair suse_fp32 = {
187                 .image = "/suseboot/vmlinux32",
188                 .initrd = "/suseboot/initrd32",
189         };
190         static const struct fixed_pair suse_fp64 = {
191                 .image = "/suseboot/vmlinux64",
192                 .initrd = "/suseboot/initrd64",
193         };
194         const struct fixed_pair *suse_fp;
195
196         /* fixup for bare values */
197
198         if (!name)
199                 name = value;
200
201         if (!state->globals_done && conf_set_global_option(conf, name, value))
202                 return;
203
204         /* image */
205         if (streq(name, "image")) {
206                 /* an image section finishes our global defintions */
207                 state->globals_done = 1;
208
209                 /* First finish any previous image. */
210                 if (opt)
211                         yaboot_finish(conf);
212
213                 /* Then start the new image. */
214                 opt = state_start_new_option(conf, state);
215
216                 state->boot_image = talloc_strdup(state, value);
217
218                 return;
219         }
220
221         /* Special processing for SUSE install CD. */
222
223         if (streq(name, "image[32bit]"))
224                 suse_fp = &suse_fp32;
225         else if (streq(name, "image[64bit]"))
226                 suse_fp = &suse_fp64;
227         else
228                 suse_fp = NULL;
229
230         if (suse_fp) {
231                 /* First finish any previous image. */
232                 if (opt)
233                         yaboot_finish(conf);
234
235                 /* Then start the new image. */
236                 opt = state_start_new_option(conf, state);
237
238                 if (*value == '/') {
239                         state->boot_image = talloc_strdup(state, value);
240                 } else {
241                         state->boot_image = talloc_strdup(state,
242                                                         suse_fp->image);
243                         state->initrd = talloc_strdup(state, suse_fp->initrd);
244                 }
245
246                 return;
247         }
248
249         /* all other processing requires an image */
250         if (!opt) {
251                 pb_debug("%s: unknown name: %s\n", __func__, name);
252                 return;
253         }
254
255         /* initrd */
256         if (streq(name, "initrd")) {
257                 state->initrd = talloc_strdup(state, value);
258                 return;
259         }
260
261         /* label */
262         if (streq(name, "label")) {
263                 opt->option->id = talloc_asprintf(opt->option, "%s#%s",
264                         conf->dc->device->device->id, value);
265                 opt->option->name = talloc_strdup(opt->option, value);
266                 return;
267         }
268
269         /* args */
270         if (streq(name, "device")) {
271                 printf("option device : %s", value);
272                 state->device = talloc_strdup(state, value);
273                 return;
274         }
275
276         if (streq(name, "parititon")) {
277                 state->partition = talloc_strdup(state, value);
278                 return;
279         }
280
281         if (streq(name, "append")) {
282                 opt->option->boot_args = talloc_asprintf_append(
283                         opt->option->boot_args, "%s ", value);
284                 return;
285         }
286
287         if (streq(name, "initrd-size")) {
288                 state->initrd_size = talloc_strdup(state, value);
289                 return;
290         }
291
292         if (streq(name, "literal")) {
293                 state->literal = talloc_strdup(state, value);
294                 return;
295         }
296
297         if (streq(name, "ramdisk")) {
298                 state->ramdisk = talloc_strdup(state, value);
299                 return;
300         }
301
302         if (streq(name, "read-only")) {
303                 state->read_only = true;
304                 return;
305         }
306
307         if (streq(name, "read-write")) {
308                 state->read_write = true;
309                 return;
310         }
311
312         if (streq(name, "root")) {
313                 state->root = talloc_strdup(state, value);
314                 return;
315         }
316
317         pb_debug("%s: unknown name: %s\n", __func__, name);
318 }
319
320 static struct conf_global_option yaboot_global_options[] = {
321         { .name = "root" },
322         { .name = "device" },
323         { .name = "partition" },
324         { .name = "initrd" },
325         { .name = "initrd_size" },
326         { .name = "video" },
327         { .name = "literal" },
328         { .name = "ramdisk" },
329         { .name = "default" },
330         { .name = NULL },
331 };
332
333 static const char *const yaboot_conf_files[] = {
334         "/yaboot.conf",
335         "/yaboot.cnf",
336         "/etc/lilo.conf",
337         "/etc/silo.conf",
338         "/etc/yaboot.conf",
339         "/etc/yaboot.cnf",
340         "/suseboot/yaboot.cnf",
341         "/YABOOT.CONF",
342         "/YABOOT.CNF",
343         "/ETC/LILO.CONF",
344         "/ETC/SILO.CONF",
345         "/ETC/YABOOT.CONF",
346         "/ETC/YABOOT.CNF",
347         "/SUSEBOOT/YABOOT.CNF",
348         NULL
349 };
350
351 static int yaboot_parse(struct discover_context *dc)
352 {
353         const char * const *filename;
354         struct yaboot_state *state;
355         struct conf_context *conf;
356         int len, rc;
357         char *buf;
358
359         /* Support block device boot only at present */
360         if (dc->event)
361                 return -1;
362
363         conf = talloc_zero(dc, struct conf_context);
364
365         if (!conf)
366                 return -1;
367
368         conf->dc = dc;
369         conf->global_options = yaboot_global_options,
370         conf_init_global_options(conf);
371         conf->get_pair = conf_get_pair_equal;
372         conf->process_pair = yaboot_process_pair;
373         conf->finish = yaboot_finish;
374         conf->parser_info = state = talloc_zero(conf, struct yaboot_state);
375
376         state->opt = NULL;
377
378         for (filename = yaboot_conf_files; *filename; filename++) {
379                 rc = parser_request_file(dc, dc->device, *filename, &buf, &len);
380                 if (rc)
381                         continue;
382
383                 conf_parse_buf(conf, buf, len);
384                 device_handler_status_dev_info(dc->handler, dc->device,
385                                 _("Parsed yaboot configuration from %s"),
386                                 *filename);
387                 talloc_free(buf);
388         }
389
390         talloc_free(conf);
391         return 0;
392 }
393
394 static struct parser yaboot_parser = {
395         .name                   = "yaboot",
396         .parse                  = yaboot_parse,
397         .resolve_resource       = resolve_devpath_resource,
398 };
399
400 register_parser(yaboot_parser);