uci_delete: check ptr->o and its type before checking ptr->value
[project/uci.git] / cli.c
1 /*
2  * cli - Command Line Interface for the Unified Configuration Interface
3  * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2
7  * as published by the Free Software Foundation
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  */
14 #include <strings.h>
15 #include <string.h>
16 #include <stdlib.h>
17 #include <unistd.h>
18 #include "uci.h"
19
20 #define MAX_ARGS        4 /* max command line arguments for batch mode */
21
22 static const char *delimiter = " ";
23 static const char *appname;
24 static enum {
25         CLI_FLAG_MERGE =    (1 << 0),
26         CLI_FLAG_QUIET =    (1 << 1),
27         CLI_FLAG_NOCOMMIT = (1 << 2),
28         CLI_FLAG_BATCH =    (1 << 3),
29         CLI_FLAG_SHOW_EXT = (1 << 4),
30 } flags;
31
32 static FILE *input;
33
34 static struct uci_context *ctx;
35 enum {
36         /* section cmds */
37         CMD_GET,
38         CMD_SET,
39         CMD_ADD_LIST,
40         CMD_DEL_LIST,
41         CMD_DEL,
42         CMD_RENAME,
43         CMD_REVERT,
44         CMD_REORDER,
45         /* package cmds */
46         CMD_SHOW,
47         CMD_CHANGES,
48         CMD_EXPORT,
49         CMD_COMMIT,
50         /* other cmds */
51         CMD_ADD,
52         CMD_IMPORT,
53         CMD_HELP,
54 };
55
56 struct uci_type_list {
57         unsigned int idx;
58         const char *name;
59         struct uci_type_list *next;
60 };
61
62 static struct uci_type_list *type_list = NULL;
63 static char *typestr = NULL;
64 static const char *cur_section_ref = NULL;
65
66 static int uci_cmd(int argc, char **argv);
67
68 static void
69 uci_reset_typelist(void)
70 {
71         struct uci_type_list *type;
72         while (type_list != NULL) {
73                         type = type_list;
74                         type_list = type_list->next;
75                         free(type);
76         }
77         if (typestr) {
78                 free(typestr);
79                 typestr = NULL;
80         }
81         cur_section_ref = NULL;
82 }
83
84 static char *
85 uci_lookup_section_ref(struct uci_section *s)
86 {
87         struct uci_type_list *ti = type_list;
88         int maxlen;
89
90         if (!s->anonymous || !(flags & CLI_FLAG_SHOW_EXT))
91                 return s->e.name;
92
93         /* look up in section type list */
94         while (ti) {
95                 if (strcmp(ti->name, s->type) == 0)
96                         break;
97                 ti = ti->next;
98         }
99         if (!ti) {
100                 ti = malloc(sizeof(struct uci_type_list));
101                 if (!ti)
102                         return NULL;
103                 memset(ti, 0, sizeof(struct uci_type_list));
104                 ti->next = type_list;
105                 type_list = ti;
106                 ti->name = s->type;
107         }
108
109         maxlen = strlen(s->type) + 1 + 2 + 10;
110         if (!typestr) {
111                 typestr = malloc(maxlen);
112         } else {
113                 typestr = realloc(typestr, maxlen);
114         }
115
116         if (typestr)
117                 sprintf(typestr, "@%s[%d]", ti->name, ti->idx);
118
119         ti->idx++;
120
121         return typestr;
122 }
123
124 static void uci_usage(void)
125 {
126         fprintf(stderr,
127                 "Usage: %s [<options>] <command> [<arguments>]\n\n"
128                 "Commands:\n"
129                 "\tbatch\n"
130                 "\texport     [<config>]\n"
131                 "\timport     [<config>]\n"
132                 "\tchanges    [<config>]\n"
133                 "\tcommit     [<config>]\n"
134                 "\tadd        <config> <section-type>\n"
135                 "\tadd_list   <config>.<section>.<option>=<string>\n"
136                 "\tdel_list   <config>.<section>.<option>=<string>\n"
137                 "\tshow       [<config>[.<section>[.<option>]]]\n"
138                 "\tget        <config>.<section>[.<option>]\n"
139                 "\tset        <config>.<section>[.<option>]=<value>\n"
140                 "\tdelete     <config>[.<section>[[.<option>][=<id>]]]\n"
141                 "\trename     <config>.<section>[.<option>]=<name>\n"
142                 "\trevert     <config>[.<section>[.<option>]]\n"
143                 "\treorder    <config>.<section>=<position>\n"
144                 "\n"
145                 "Options:\n"
146                 "\t-c <path>  set the search path for config files (default: /etc/config)\n"
147                 "\t-d <str>   set the delimiter for list values in uci show\n"
148                 "\t-f <file>  use <file> as input instead of stdin\n"
149                 "\t-m         when importing, merge data into an existing package\n"
150                 "\t-n         name unnamed sections on export (default)\n"
151                 "\t-N         don't name unnamed sections\n"
152                 "\t-p <path>  add a search path for config change files\n"
153                 "\t-P <path>  add a search path for config change files and use as default\n"
154                 "\t-q         quiet mode (don't print error messages)\n"
155                 "\t-s         force strict mode (stop on parser errors, default)\n"
156                 "\t-S         disable strict mode\n"
157                 "\t-X         do not use extended syntax on 'show'\n"
158                 "\n",
159                 appname
160         );
161 }
162
163 static void cli_perror(void)
164 {
165         if (flags & CLI_FLAG_QUIET)
166                 return;
167
168         uci_perror(ctx, appname);
169 }
170
171 static void uci_show_value(struct uci_option *o)
172 {
173         struct uci_element *e;
174         bool sep = false;
175
176         switch(o->type) {
177         case UCI_TYPE_STRING:
178                 printf("%s\n", o->v.string);
179                 break;
180         case UCI_TYPE_LIST:
181                 uci_foreach_element(&o->v.list, e) {
182                         printf("%s%s", (sep ? delimiter : ""), e->name);
183                         sep = true;
184                 }
185                 printf("\n");
186                 break;
187         default:
188                 printf("<unknown>\n");
189                 break;
190         }
191 }
192
193 static void uci_show_option(struct uci_option *o)
194 {
195         printf("%s.%s.%s=",
196                 o->section->package->e.name,
197                 (cur_section_ref ? cur_section_ref : o->section->e.name),
198                 o->e.name);
199         uci_show_value(o);
200 }
201
202 static void uci_show_section(struct uci_section *s)
203 {
204         struct uci_element *e;
205         const char *cname;
206         const char *sname;
207
208         cname = s->package->e.name;
209         sname = (cur_section_ref ? cur_section_ref : s->e.name);
210         printf("%s.%s=%s\n", cname, sname, s->type);
211         uci_foreach_element(&s->options, e) {
212                 uci_show_option(uci_to_option(e));
213         }
214 }
215
216 static void uci_show_package(struct uci_package *p)
217 {
218         struct uci_element *e;
219
220         uci_reset_typelist();
221         uci_foreach_element( &p->sections, e) {
222                 struct uci_section *s = uci_to_section(e);
223                 cur_section_ref = uci_lookup_section_ref(s);
224                 uci_show_section(s);
225         }
226         uci_reset_typelist();
227 }
228
229 static void uci_show_changes(struct uci_package *p)
230 {
231         struct uci_element *e;
232
233         uci_foreach_element(&p->saved_delta, e) {
234                 struct uci_delta *h = uci_to_delta(e);
235                 char *prefix = "";
236                 char *op = "=";
237
238                 switch(h->cmd) {
239                 case UCI_CMD_REMOVE:
240                         prefix = "-";
241                         break;
242                 case UCI_CMD_LIST_ADD:
243                         op = "+=";
244                         break;
245                 case UCI_CMD_LIST_DEL:
246                         op = "-=";
247                         break;
248                 default:
249                         break;
250                 }
251                 printf("%s%s.%s", prefix, p->e.name, h->section);
252                 if (e->name)
253                         printf(".%s", e->name);
254                 if (h->cmd != UCI_CMD_REMOVE)
255                         printf("%s%s", op, h->value);
256                 printf("\n");
257         }
258 }
259
260 static int package_cmd(int cmd, char *tuple)
261 {
262         struct uci_element *e = NULL;
263         struct uci_ptr ptr;
264         int ret = 0;
265
266         if (uci_lookup_ptr(ctx, &ptr, tuple, true) != UCI_OK) {
267                 cli_perror();
268                 return 1;
269         }
270
271         e = ptr.last;
272         switch(cmd) {
273         case CMD_CHANGES:
274                 uci_show_changes(ptr.p);
275                 break;
276         case CMD_COMMIT:
277                 if (flags & CLI_FLAG_NOCOMMIT)
278                         return 0;
279                 if (uci_commit(ctx, &ptr.p, false) != UCI_OK) {
280                         cli_perror();
281                         ret = 1;
282                 }
283                 break;
284         case CMD_EXPORT:
285                 uci_export(ctx, stdout, ptr.p, true);
286                 break;
287         case CMD_SHOW:
288                 if (!(ptr.flags & UCI_LOOKUP_COMPLETE)) {
289                         ctx->err = UCI_ERR_NOTFOUND;
290                         cli_perror();
291                         ret = 1;
292                 }
293                 switch(e->type) {
294                         case UCI_TYPE_PACKAGE:
295                                 uci_show_package(ptr.p);
296                                 break;
297                         case UCI_TYPE_SECTION:
298                                 uci_show_section(ptr.s);
299                                 break;
300                         case UCI_TYPE_OPTION:
301                                 uci_show_option(ptr.o);
302                                 break;
303                         default:
304                                 /* should not happen */
305                                 return 1;
306                 }
307                 break;
308         }
309
310         if (ptr.p)
311                 uci_unload(ctx, ptr.p);
312         return ret;
313 }
314
315 static int uci_do_import(int argc, char **argv)
316 {
317         struct uci_package *package = NULL;
318         char *name = NULL;
319         int ret = UCI_OK;
320         bool merge = false;
321
322         if (argc > 2)
323                 return 255;
324
325         if (argc == 2)
326                 name = argv[1];
327         else if (flags & CLI_FLAG_MERGE)
328                 /* need a package to merge */
329                 return 255;
330
331         if (flags & CLI_FLAG_MERGE) {
332                 if (uci_load(ctx, name, &package) != UCI_OK)
333                         package = NULL;
334                 else
335                         merge = true;
336         }
337         ret = uci_import(ctx, input, name, &package, (name != NULL));
338         if (ret == UCI_OK) {
339                 if (merge) {
340                         ret = uci_save(ctx, package);
341                 } else {
342                         struct uci_element *e;
343                         /* loop through all config sections and overwrite existing data */
344                         uci_foreach_element(&ctx->root, e) {
345                                 struct uci_package *p = uci_to_package(e);
346                                 ret = uci_commit(ctx, &p, true);
347                         }
348                 }
349         }
350
351         if (ret != UCI_OK) {
352                 cli_perror();
353                 return 1;
354         }
355
356         return 0;
357 }
358
359 static int uci_do_package_cmd(int cmd, int argc, char **argv)
360 {
361         char **configs = NULL;
362         char **p;
363
364         if (argc > 2)
365                 return 255;
366
367         if (argc == 2)
368                 return package_cmd(cmd, argv[1]);
369
370         if ((uci_list_configs(ctx, &configs) != UCI_OK) || !configs) {
371                 cli_perror();
372                 return 1;
373         }
374
375         for (p = configs; *p; p++) {
376                 package_cmd(cmd, *p);
377         }
378
379         return 0;
380 }
381
382 static int uci_do_add(int argc, char **argv)
383 {
384         struct uci_package *p = NULL;
385         struct uci_section *s = NULL;
386         int ret;
387
388         if (argc != 3)
389                 return 255;
390
391         ret = uci_load(ctx, argv[1], &p);
392         if (ret != UCI_OK)
393                 goto done;
394
395         ret = uci_add_section(ctx, p, argv[2], &s);
396         if (ret != UCI_OK)
397                 goto done;
398
399         ret = uci_save(ctx, p);
400
401 done:
402         if (ret != UCI_OK)
403                 cli_perror();
404         else if (s)
405                 fprintf(stdout, "%s\n", s->e.name);
406
407         return ret;
408 }
409
410 static int uci_do_section_cmd(int cmd, int argc, char **argv)
411 {
412         struct uci_element *e;
413         struct uci_ptr ptr;
414         int ret = UCI_OK;
415         int dummy;
416
417         if (argc != 2)
418                 return 255;
419
420         if (uci_lookup_ptr(ctx, &ptr, argv[1], true) != UCI_OK) {
421                 cli_perror();
422                 return 1;
423         }
424
425         if (ptr.value && (cmd != CMD_SET) && (cmd != CMD_DEL) &&
426             (cmd != CMD_ADD_LIST) && (cmd != CMD_DEL_LIST) &&
427             (cmd != CMD_RENAME) && (cmd != CMD_REORDER))
428                 return 1;
429
430         e = ptr.last;
431         switch(cmd) {
432         case CMD_GET:
433                 if (!(ptr.flags & UCI_LOOKUP_COMPLETE)) {
434                         ctx->err = UCI_ERR_NOTFOUND;
435                         cli_perror();
436                         return 1;
437                 }
438                 switch(e->type) {
439                 case UCI_TYPE_SECTION:
440                         printf("%s\n", ptr.s->type);
441                         break;
442                 case UCI_TYPE_OPTION:
443                         uci_show_value(ptr.o);
444                         break;
445                 default:
446                         break;
447                 }
448                 /* throw the value to stdout */
449                 break;
450         case CMD_RENAME:
451                 ret = uci_rename(ctx, &ptr);
452                 break;
453         case CMD_REVERT:
454                 ret = uci_revert(ctx, &ptr);
455                 break;
456         case CMD_SET:
457                 ret = uci_set(ctx, &ptr);
458                 break;
459         case CMD_ADD_LIST:
460                 ret = uci_add_list(ctx, &ptr);
461                 break;
462         case CMD_DEL_LIST:
463                 ret = uci_del_list(ctx, &ptr);
464                 break;
465         case CMD_REORDER:
466                 if (!ptr.s || !ptr.value) {
467                         ctx->err = UCI_ERR_NOTFOUND;
468                         cli_perror();
469                         return 1;
470                 }
471                 ret = uci_reorder_section(ctx, ptr.s, strtoul(ptr.value, NULL, 10));
472                 break;
473         case CMD_DEL:
474                 if (ptr.value && !sscanf(ptr.value, "%d", &dummy))
475                         return 1;
476                 ret = uci_delete(ctx, &ptr);
477                 break;
478         }
479
480         /* no save necessary for get */
481         if ((cmd == CMD_GET) || (cmd == CMD_REVERT))
482                 return 0;
483
484         /* save changes, but don't commit them yet */
485         if (ret == UCI_OK)
486                 ret = uci_save(ctx, ptr.p);
487
488         if (ret != UCI_OK) {
489                 cli_perror();
490                 return 1;
491         }
492
493         return 0;
494 }
495
496 static int uci_batch_cmd(void)
497 {
498         char *argv[MAX_ARGS + 2];
499         char *str = NULL;
500         int ret = 0;
501         int i, j;
502
503         for(i = 0; i <= MAX_ARGS; i++) {
504                 if (i == MAX_ARGS) {
505                         fprintf(stderr, "Too many arguments\n");
506                         return 1;
507                 }
508                 argv[i] = NULL;
509                 if ((ret = uci_parse_argument(ctx, input, &str, &argv[i])) != UCI_OK) {
510                         cli_perror();
511                         i = 0;
512                         break;
513                 }
514                 if (!argv[i][0])
515                         break;
516                 argv[i] = strdup(argv[i]);
517                 if (!argv[i]) {
518                         perror("uci");
519                         return 1;
520                 }
521         }
522         argv[i] = NULL;
523
524         if (i > 0) {
525                 if (!strcasecmp(argv[0], "exit"))
526                         return 254;
527                 ret = uci_cmd(i, argv);
528         } else
529                 return 0;
530
531         for (j = 0; j < i; j++) {
532                 if (argv[j])
533                         free(argv[j]);
534         }
535
536         return ret;
537 }
538
539 static int uci_batch(void)
540 {
541         int ret = 0;
542
543         flags |= CLI_FLAG_BATCH;
544         while (!feof(input)) {
545                 struct uci_element *e, *tmp;
546
547                 ret = uci_batch_cmd();
548                 if (ret == 254)
549                         return 0;
550                 else if (ret == 255)
551                         fprintf(stderr, "Unknown command\n");
552
553                 /* clean up */
554                 uci_foreach_element_safe(&ctx->root, tmp, e) {
555                         uci_unload(ctx, uci_to_package(e));
556                 }
557         }
558         flags &= ~CLI_FLAG_BATCH;
559
560         return 0;
561 }
562
563 static int uci_cmd(int argc, char **argv)
564 {
565         int cmd = 0;
566
567         if (!strcasecmp(argv[0], "batch") && !(flags & CLI_FLAG_BATCH))
568                 return uci_batch();
569         else if (!strcasecmp(argv[0], "show"))
570                 cmd = CMD_SHOW;
571         else if (!strcasecmp(argv[0], "changes"))
572                 cmd = CMD_CHANGES;
573         else if (!strcasecmp(argv[0], "export"))
574                 cmd = CMD_EXPORT;
575         else if (!strcasecmp(argv[0], "commit"))
576                 cmd = CMD_COMMIT;
577         else if (!strcasecmp(argv[0], "get"))
578                 cmd = CMD_GET;
579         else if (!strcasecmp(argv[0], "set"))
580                 cmd = CMD_SET;
581         else if (!strcasecmp(argv[0], "ren") ||
582                  !strcasecmp(argv[0], "rename"))
583                 cmd = CMD_RENAME;
584         else if (!strcasecmp(argv[0], "revert"))
585                 cmd = CMD_REVERT;
586         else if (!strcasecmp(argv[0], "reorder"))
587                 cmd = CMD_REORDER;
588         else if (!strcasecmp(argv[0], "del") ||
589                  !strcasecmp(argv[0], "delete"))
590                 cmd = CMD_DEL;
591         else if (!strcasecmp(argv[0], "import"))
592                 cmd = CMD_IMPORT;
593         else if (!strcasecmp(argv[0], "help"))
594                 cmd = CMD_HELP;
595         else if (!strcasecmp(argv[0], "add"))
596                 cmd = CMD_ADD;
597         else if (!strcasecmp(argv[0], "add_list"))
598                 cmd = CMD_ADD_LIST;
599         else if (!strcasecmp(argv[0], "del_list"))
600                 cmd = CMD_DEL_LIST;
601         else
602                 cmd = -1;
603
604         switch(cmd) {
605                 case CMD_ADD_LIST:
606                 case CMD_DEL_LIST:
607                 case CMD_GET:
608                 case CMD_SET:
609                 case CMD_DEL:
610                 case CMD_RENAME:
611                 case CMD_REVERT:
612                 case CMD_REORDER:
613                         return uci_do_section_cmd(cmd, argc, argv);
614                 case CMD_SHOW:
615                 case CMD_EXPORT:
616                 case CMD_COMMIT:
617                 case CMD_CHANGES:
618                         return uci_do_package_cmd(cmd, argc, argv);
619                 case CMD_IMPORT:
620                         return uci_do_import(argc, argv);
621                 case CMD_ADD:
622                         return uci_do_add(argc, argv);
623                 case CMD_HELP:
624                         uci_usage();
625                         return 0;
626                 default:
627                         return 255;
628         }
629 }
630
631 int main(int argc, char **argv)
632 {
633         int ret;
634         int c;
635
636         flags = CLI_FLAG_SHOW_EXT;
637         appname = argv[0];
638         input = stdin;
639         ctx = uci_alloc_context();
640         if (!ctx) {
641                 fprintf(stderr, "Out of memory\n");
642                 return 1;
643         }
644
645         while((c = getopt(argc, argv, "c:d:f:LmnNp:P:sSqX")) != -1) {
646                 switch(c) {
647                         case 'c':
648                                 uci_set_confdir(ctx, optarg);
649                                 break;
650                         case 'd':
651                                 delimiter = optarg;
652                                 break;
653                         case 'f':
654                                 if (input != stdin) {
655                                         perror("uci");
656                                         return 1;
657                                 }
658
659                                 input = fopen(optarg, "r");
660                                 if (!input) {
661                                         perror("uci");
662                                         return 1;
663                                 }
664                                 break;
665                         case 'm':
666                                 flags |= CLI_FLAG_MERGE;
667                                 break;
668                         case 's':
669                                 ctx->flags |= UCI_FLAG_STRICT;
670                                 break;
671                         case 'S':
672                                 ctx->flags &= ~UCI_FLAG_STRICT;
673                                 ctx->flags |= UCI_FLAG_PERROR;
674                                 break;
675                         case 'n':
676                                 ctx->flags |= UCI_FLAG_EXPORT_NAME;
677                                 break;
678                         case 'N':
679                                 ctx->flags &= ~UCI_FLAG_EXPORT_NAME;
680                                 break;
681                         case 'p':
682                                 uci_add_delta_path(ctx, optarg);
683                                 break;
684                         case 'P':
685                                 uci_add_delta_path(ctx, ctx->savedir);
686                                 uci_set_savedir(ctx, optarg);
687                                 flags |= CLI_FLAG_NOCOMMIT;
688                                 break;
689                         case 'q':
690                                 flags |= CLI_FLAG_QUIET;
691                                 break;
692                         case 'X':
693                                 flags &= ~CLI_FLAG_SHOW_EXT;
694                                 break;
695                         default:
696                                 uci_usage();
697                                 return 0;
698                 }
699         }
700         if (optind > 1)
701                 argv[optind - 1] = argv[0];
702         argv += optind - 1;
703         argc -= optind - 1;
704
705         if (argc < 2) {
706                 uci_usage();
707                 return 0;
708         }
709
710         ret = uci_cmd(argc - 1, argv + 1);
711         if (input != stdin)
712                 fclose(input);
713
714         if (ret == 255)
715                 uci_usage();
716
717         uci_free_context(ctx);
718
719         return ret;
720 }