extend delete command so it can delete list elemets using index
[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         CLI_FLAG_NOPLUGINS= (1 << 5),
31 } flags;
32
33 static FILE *input;
34
35 static struct uci_context *ctx;
36 enum {
37         /* section cmds */
38         CMD_GET,
39         CMD_SET,
40         CMD_ADD_LIST,
41         CMD_DEL_LIST,
42         CMD_DEL,
43         CMD_RENAME,
44         CMD_REVERT,
45         CMD_REORDER,
46         /* package cmds */
47         CMD_SHOW,
48         CMD_CHANGES,
49         CMD_EXPORT,
50         CMD_COMMIT,
51         /* other cmds */
52         CMD_ADD,
53         CMD_IMPORT,
54         CMD_HELP,
55 };
56
57 struct uci_type_list {
58         unsigned int idx;
59         const char *name;
60         struct uci_type_list *next;
61 };
62
63 static struct uci_type_list *type_list = NULL;
64 static char *typestr = NULL;
65 static const char *cur_section_ref = NULL;
66
67 static int uci_cmd(int argc, char **argv);
68
69 static void
70 uci_reset_typelist(void)
71 {
72         struct uci_type_list *type;
73         while (type_list != NULL) {
74                         type = type_list;
75                         type_list = type_list->next;
76                         free(type);
77         }
78         if (typestr) {
79                 free(typestr);
80                 typestr = NULL;
81         }
82         cur_section_ref = NULL;
83 }
84
85 static char *
86 uci_lookup_section_ref(struct uci_section *s)
87 {
88         struct uci_type_list *ti = type_list;
89         int maxlen;
90
91         if (!s->anonymous || !(flags & CLI_FLAG_SHOW_EXT))
92                 return s->e.name;
93
94         /* look up in section type list */
95         while (ti) {
96                 if (strcmp(ti->name, s->type) == 0)
97                         break;
98                 ti = ti->next;
99         }
100         if (!ti) {
101                 ti = malloc(sizeof(struct uci_type_list));
102                 if (!ti)
103                         return NULL;
104                 memset(ti, 0, sizeof(struct uci_type_list));
105                 ti->next = type_list;
106                 type_list = ti;
107                 ti->name = s->type;
108         }
109
110         maxlen = strlen(s->type) + 1 + 2 + 10;
111         if (!typestr) {
112                 typestr = malloc(maxlen);
113         } else {
114                 typestr = realloc(typestr, maxlen);
115         }
116
117         if (typestr)
118                 sprintf(typestr, "@%s[%d]", ti->name, ti->idx);
119
120         ti->idx++;
121
122         return typestr;
123 }
124
125 static void uci_usage(void)
126 {
127         fprintf(stderr,
128                 "Usage: %s [<options>] <command> [<arguments>]\n\n"
129                 "Commands:\n"
130                 "\tbatch\n"
131                 "\texport     [<config>]\n"
132                 "\timport     [<config>]\n"
133                 "\tchanges    [<config>]\n"
134                 "\tcommit     [<config>]\n"
135                 "\tadd        <config> <section-type>\n"
136                 "\tadd_list   <config>.<section>.<option>=<string>\n"
137                 "\tdel_list   <config>.<section>.<option>=<string>\n"
138                 "\tshow       [<config>[.<section>[.<option>]]]\n"
139                 "\tget        <config>.<section>[.<option>]\n"
140                 "\tset        <config>.<section>[.<option>]=<value>\n"
141                 "\tdelete     <config>[.<section>[[.<option>][=<id>]]]\n"
142                 "\trename     <config>.<section>[.<option>]=<name>\n"
143                 "\trevert     <config>[.<section>[.<option>]]\n"
144                 "\treorder    <config>.<section>=<position>\n"
145                 "\n"
146                 "Options:\n"
147                 "\t-c <path>  set the search path for config files (default: /etc/config)\n"
148                 "\t-d <str>   set the delimiter for list values in uci show\n"
149                 "\t-f <file>  use <file> as input instead of stdin\n"
150                 "\t-L         do not load any plugins\n"
151                 "\t-m         when importing, merge data into an existing package\n"
152                 "\t-n         name unnamed sections on export (default)\n"
153                 "\t-N         don't name unnamed sections\n"
154                 "\t-p <path>  add a search path for config change files\n"
155                 "\t-P <path>  add a search path for config change files and use as default\n"
156                 "\t-q         quiet mode (don't print error messages)\n"
157                 "\t-s         force strict mode (stop on parser errors, default)\n"
158                 "\t-S         disable strict mode\n"
159                 "\t-X         do not use extended syntax on 'show'\n"
160                 "\n",
161                 appname
162         );
163 }
164
165 static void cli_perror(void)
166 {
167         if (flags & CLI_FLAG_QUIET)
168                 return;
169
170         uci_perror(ctx, appname);
171 }
172
173 static void uci_show_value(struct uci_option *o)
174 {
175         struct uci_element *e;
176         bool sep = false;
177
178         switch(o->type) {
179         case UCI_TYPE_STRING:
180                 printf("%s\n", o->v.string);
181                 break;
182         case UCI_TYPE_LIST:
183                 uci_foreach_element(&o->v.list, e) {
184                         printf("%s%s", (sep ? delimiter : ""), e->name);
185                         sep = true;
186                 }
187                 printf("\n");
188                 break;
189         default:
190                 printf("<unknown>\n");
191                 break;
192         }
193 }
194
195 static void uci_show_option(struct uci_option *o)
196 {
197         printf("%s.%s.%s=",
198                 o->section->package->e.name,
199                 (cur_section_ref ? cur_section_ref : o->section->e.name),
200                 o->e.name);
201         uci_show_value(o);
202 }
203
204 static void uci_show_section(struct uci_section *s)
205 {
206         struct uci_element *e;
207         const char *cname;
208         const char *sname;
209
210         cname = s->package->e.name;
211         sname = (cur_section_ref ? cur_section_ref : s->e.name);
212         printf("%s.%s=%s\n", cname, sname, s->type);
213         uci_foreach_element(&s->options, e) {
214                 uci_show_option(uci_to_option(e));
215         }
216 }
217
218 static void uci_show_package(struct uci_package *p)
219 {
220         struct uci_element *e;
221
222         uci_reset_typelist();
223         uci_foreach_element( &p->sections, e) {
224                 struct uci_section *s = uci_to_section(e);
225                 cur_section_ref = uci_lookup_section_ref(s);
226                 uci_show_section(s);
227         }
228         uci_reset_typelist();
229 }
230
231 static void uci_show_changes(struct uci_package *p)
232 {
233         struct uci_element *e;
234
235         uci_foreach_element(&p->saved_delta, e) {
236                 struct uci_delta *h = uci_to_delta(e);
237                 char *prefix = "";
238                 char *op = "=";
239
240                 switch(h->cmd) {
241                 case UCI_CMD_REMOVE:
242                         prefix = "-";
243                         break;
244                 case UCI_CMD_LIST_ADD:
245                         op = "+=";
246                         break;
247                 case UCI_CMD_LIST_DEL:
248                         op = "-=";
249                         break;
250                 default:
251                         break;
252                 }
253                 printf("%s%s.%s", prefix, p->e.name, h->section);
254                 if (e->name)
255                         printf(".%s", e->name);
256                 if (h->cmd != UCI_CMD_REMOVE)
257                         printf("%s%s", op, h->value);
258                 printf("\n");
259         }
260 }
261
262 static int package_cmd(int cmd, char *tuple)
263 {
264         struct uci_element *e = NULL;
265         struct uci_ptr ptr;
266         int ret = 0;
267
268         if (uci_lookup_ptr(ctx, &ptr, tuple, true) != UCI_OK) {
269                 cli_perror();
270                 return 1;
271         }
272
273         e = ptr.last;
274         switch(cmd) {
275         case CMD_CHANGES:
276                 uci_show_changes(ptr.p);
277                 break;
278         case CMD_COMMIT:
279                 if (flags & CLI_FLAG_NOCOMMIT)
280                         return 0;
281                 if (uci_commit(ctx, &ptr.p, false) != UCI_OK) {
282                         cli_perror();
283                         ret = 1;
284                 }
285                 break;
286         case CMD_EXPORT:
287                 uci_export(ctx, stdout, ptr.p, true);
288                 break;
289         case CMD_SHOW:
290                 if (!(ptr.flags & UCI_LOOKUP_COMPLETE)) {
291                         ctx->err = UCI_ERR_NOTFOUND;
292                         cli_perror();
293                         ret = 1;
294                 }
295                 switch(e->type) {
296                         case UCI_TYPE_PACKAGE:
297                                 uci_show_package(ptr.p);
298                                 break;
299                         case UCI_TYPE_SECTION:
300                                 uci_show_section(ptr.s);
301                                 break;
302                         case UCI_TYPE_OPTION:
303                                 uci_show_option(ptr.o);
304                                 break;
305                         default:
306                                 /* should not happen */
307                                 return 1;
308                 }
309                 break;
310         }
311
312         if (ptr.p)
313                 uci_unload(ctx, ptr.p);
314         return ret;
315 }
316
317 static int uci_do_import(int argc, char **argv)
318 {
319         struct uci_package *package = NULL;
320         char *name = NULL;
321         int ret = UCI_OK;
322         bool merge = false;
323
324         if (argc > 2)
325                 return 255;
326
327         if (argc == 2)
328                 name = argv[1];
329         else if (flags & CLI_FLAG_MERGE)
330                 /* need a package to merge */
331                 return 255;
332
333         if (flags & CLI_FLAG_MERGE) {
334                 if (uci_load(ctx, name, &package) != UCI_OK)
335                         package = NULL;
336                 else
337                         merge = true;
338         }
339         ret = uci_import(ctx, input, name, &package, (name != NULL));
340         if (ret == UCI_OK) {
341                 if (merge) {
342                         ret = uci_save(ctx, package);
343                 } else {
344                         struct uci_element *e;
345                         /* loop through all config sections and overwrite existing data */
346                         uci_foreach_element(&ctx->root, e) {
347                                 struct uci_package *p = uci_to_package(e);
348                                 ret = uci_commit(ctx, &p, true);
349                         }
350                 }
351         }
352
353         if (ret != UCI_OK) {
354                 cli_perror();
355                 return 1;
356         }
357
358         return 0;
359 }
360
361 static int uci_do_package_cmd(int cmd, int argc, char **argv)
362 {
363         char **configs = NULL;
364         char **p;
365
366         if (argc > 2)
367                 return 255;
368
369         if (argc == 2)
370                 return package_cmd(cmd, argv[1]);
371
372         if ((uci_list_configs(ctx, &configs) != UCI_OK) || !configs) {
373                 cli_perror();
374                 return 1;
375         }
376
377         for (p = configs; *p; p++) {
378                 package_cmd(cmd, *p);
379         }
380
381         return 0;
382 }
383
384 static int uci_do_add(int argc, char **argv)
385 {
386         struct uci_package *p = NULL;
387         struct uci_section *s = NULL;
388         int ret;
389
390         if (argc != 3)
391                 return 255;
392
393         ret = uci_load(ctx, argv[1], &p);
394         if (ret != UCI_OK)
395                 goto done;
396
397         ret = uci_add_section(ctx, p, argv[2], &s);
398         if (ret != UCI_OK)
399                 goto done;
400
401         ret = uci_save(ctx, p);
402
403 done:
404         if (ret != UCI_OK)
405                 cli_perror();
406         else if (s)
407                 fprintf(stdout, "%s\n", s->e.name);
408
409         return ret;
410 }
411
412 static int uci_do_section_cmd(int cmd, int argc, char **argv)
413 {
414         struct uci_element *e;
415         struct uci_ptr ptr;
416         int ret = UCI_OK;
417         int dummy;
418
419         if (argc != 2)
420                 return 255;
421
422         if (uci_lookup_ptr(ctx, &ptr, argv[1], true) != UCI_OK) {
423                 cli_perror();
424                 return 1;
425         }
426
427         if (ptr.value && (cmd != CMD_SET) && (cmd != CMD_DEL) &&
428             (cmd != CMD_ADD_LIST) && (cmd != CMD_DEL_LIST) &&
429             (cmd != CMD_RENAME) && (cmd != CMD_REORDER))
430                 return 1;
431
432         e = ptr.last;
433         switch(cmd) {
434         case CMD_GET:
435                 if (!(ptr.flags & UCI_LOOKUP_COMPLETE)) {
436                         ctx->err = UCI_ERR_NOTFOUND;
437                         cli_perror();
438                         return 1;
439                 }
440                 switch(e->type) {
441                 case UCI_TYPE_SECTION:
442                         printf("%s\n", ptr.s->type);
443                         break;
444                 case UCI_TYPE_OPTION:
445                         uci_show_value(ptr.o);
446                         break;
447                 default:
448                         break;
449                 }
450                 /* throw the value to stdout */
451                 break;
452         case CMD_RENAME:
453                 ret = uci_rename(ctx, &ptr);
454                 break;
455         case CMD_REVERT:
456                 ret = uci_revert(ctx, &ptr);
457                 break;
458         case CMD_SET:
459                 ret = uci_set(ctx, &ptr);
460                 break;
461         case CMD_ADD_LIST:
462                 ret = uci_add_list(ctx, &ptr);
463                 break;
464         case CMD_DEL_LIST:
465                 ret = uci_del_list(ctx, &ptr);
466                 break;
467         case CMD_REORDER:
468                 if (!ptr.s || !ptr.value) {
469                         ctx->err = UCI_ERR_NOTFOUND;
470                         cli_perror();
471                         return 1;
472                 }
473                 ret = uci_reorder_section(ctx, ptr.s, strtoul(ptr.value, NULL, 10));
474                 break;
475         case CMD_DEL:
476                 if (ptr.value && !sscanf(ptr.value, "%d", &dummy))
477                         return 1;
478                 ret = uci_delete(ctx, &ptr);
479                 break;
480         }
481
482         /* no save necessary for get */
483         if ((cmd == CMD_GET) || (cmd == CMD_REVERT))
484                 return 0;
485
486         /* save changes, but don't commit them yet */
487         if (ret == UCI_OK)
488                 ret = uci_save(ctx, ptr.p);
489
490         if (ret != UCI_OK) {
491                 cli_perror();
492                 return 1;
493         }
494
495         return 0;
496 }
497
498 static int uci_batch_cmd(void)
499 {
500         char *argv[MAX_ARGS + 2];
501         char *str = NULL;
502         int ret = 0;
503         int i, j;
504
505         for(i = 0; i <= MAX_ARGS; i++) {
506                 if (i == MAX_ARGS) {
507                         fprintf(stderr, "Too many arguments\n");
508                         return 1;
509                 }
510                 argv[i] = NULL;
511                 if ((ret = uci_parse_argument(ctx, input, &str, &argv[i])) != UCI_OK) {
512                         cli_perror();
513                         i = 0;
514                         break;
515                 }
516                 if (!argv[i][0])
517                         break;
518                 argv[i] = strdup(argv[i]);
519                 if (!argv[i]) {
520                         perror("uci");
521                         return 1;
522                 }
523         }
524         argv[i] = NULL;
525
526         if (i > 0) {
527                 if (!strcasecmp(argv[0], "exit"))
528                         return 254;
529                 ret = uci_cmd(i, argv);
530         } else
531                 return 0;
532
533         for (j = 0; j < i; j++) {
534                 if (argv[j])
535                         free(argv[j]);
536         }
537
538         return ret;
539 }
540
541 static int uci_batch(void)
542 {
543         int ret = 0;
544
545         flags |= CLI_FLAG_BATCH;
546         while (!feof(input)) {
547                 struct uci_element *e, *tmp;
548
549                 ret = uci_batch_cmd();
550                 if (ret == 254)
551                         return 0;
552                 else if (ret == 255)
553                         fprintf(stderr, "Unknown command\n");
554
555                 /* clean up */
556                 uci_foreach_element_safe(&ctx->root, tmp, e) {
557                         uci_unload(ctx, uci_to_package(e));
558                 }
559         }
560         flags &= ~CLI_FLAG_BATCH;
561
562         return 0;
563 }
564
565 static int uci_cmd(int argc, char **argv)
566 {
567         int cmd = 0;
568
569         if (!strcasecmp(argv[0], "batch") && !(flags & CLI_FLAG_BATCH))
570                 return uci_batch();
571         else if (!strcasecmp(argv[0], "show"))
572                 cmd = CMD_SHOW;
573         else if (!strcasecmp(argv[0], "changes"))
574                 cmd = CMD_CHANGES;
575         else if (!strcasecmp(argv[0], "export"))
576                 cmd = CMD_EXPORT;
577         else if (!strcasecmp(argv[0], "commit"))
578                 cmd = CMD_COMMIT;
579         else if (!strcasecmp(argv[0], "get"))
580                 cmd = CMD_GET;
581         else if (!strcasecmp(argv[0], "set"))
582                 cmd = CMD_SET;
583         else if (!strcasecmp(argv[0], "ren") ||
584                  !strcasecmp(argv[0], "rename"))
585                 cmd = CMD_RENAME;
586         else if (!strcasecmp(argv[0], "revert"))
587                 cmd = CMD_REVERT;
588         else if (!strcasecmp(argv[0], "reorder"))
589                 cmd = CMD_REORDER;
590         else if (!strcasecmp(argv[0], "del") ||
591                  !strcasecmp(argv[0], "delete"))
592                 cmd = CMD_DEL;
593         else if (!strcasecmp(argv[0], "import"))
594                 cmd = CMD_IMPORT;
595         else if (!strcasecmp(argv[0], "help"))
596                 cmd = CMD_HELP;
597         else if (!strcasecmp(argv[0], "add"))
598                 cmd = CMD_ADD;
599         else if (!strcasecmp(argv[0], "add_list"))
600                 cmd = CMD_ADD_LIST;
601         else if (!strcasecmp(argv[0], "del_list"))
602                 cmd = CMD_DEL_LIST;
603         else
604                 cmd = -1;
605
606         switch(cmd) {
607                 case CMD_ADD_LIST:
608                 case CMD_DEL_LIST:
609                 case CMD_GET:
610                 case CMD_SET:
611                 case CMD_DEL:
612                 case CMD_RENAME:
613                 case CMD_REVERT:
614                 case CMD_REORDER:
615                         return uci_do_section_cmd(cmd, argc, argv);
616                 case CMD_SHOW:
617                 case CMD_EXPORT:
618                 case CMD_COMMIT:
619                 case CMD_CHANGES:
620                         return uci_do_package_cmd(cmd, argc, argv);
621                 case CMD_IMPORT:
622                         return uci_do_import(argc, argv);
623                 case CMD_ADD:
624                         return uci_do_add(argc, argv);
625                 case CMD_HELP:
626                         uci_usage();
627                         return 0;
628                 default:
629                         return 255;
630         }
631 }
632
633 int main(int argc, char **argv)
634 {
635         int ret;
636         int c;
637
638         flags = CLI_FLAG_SHOW_EXT;
639         appname = argv[0];
640         input = stdin;
641         ctx = uci_alloc_context();
642         if (!ctx) {
643                 fprintf(stderr, "Out of memory\n");
644                 return 1;
645         }
646
647         while((c = getopt(argc, argv, "c:d:f:LmnNp:P:sSqX")) != -1) {
648                 switch(c) {
649                         case 'c':
650                                 uci_set_confdir(ctx, optarg);
651                                 break;
652                         case 'd':
653                                 delimiter = optarg;
654                                 break;
655                         case 'f':
656                                 if (input != stdin) {
657                                         perror("uci");
658                                         return 1;
659                                 }
660
661                                 input = fopen(optarg, "r");
662                                 if (!input) {
663                                         perror("uci");
664                                         return 1;
665                                 }
666                                 break;
667                         case 'L':
668                                 flags |= CLI_FLAG_NOPLUGINS;
669                                 break;
670                         case 'm':
671                                 flags |= CLI_FLAG_MERGE;
672                                 break;
673                         case 's':
674                                 ctx->flags |= UCI_FLAG_STRICT;
675                                 break;
676                         case 'S':
677                                 ctx->flags &= ~UCI_FLAG_STRICT;
678                                 ctx->flags |= UCI_FLAG_PERROR;
679                                 break;
680                         case 'n':
681                                 ctx->flags |= UCI_FLAG_EXPORT_NAME;
682                                 break;
683                         case 'N':
684                                 ctx->flags &= ~UCI_FLAG_EXPORT_NAME;
685                                 break;
686                         case 'p':
687                                 uci_add_delta_path(ctx, optarg);
688                                 break;
689                         case 'P':
690                                 uci_add_delta_path(ctx, ctx->savedir);
691                                 uci_set_savedir(ctx, optarg);
692                                 flags |= CLI_FLAG_NOCOMMIT;
693                                 break;
694                         case 'q':
695                                 flags |= CLI_FLAG_QUIET;
696                                 break;
697                         case 'X':
698                                 flags &= ~CLI_FLAG_SHOW_EXT;
699                                 break;
700                         default:
701                                 uci_usage();
702                                 return 0;
703                 }
704         }
705         if (optind > 1)
706                 argv[optind - 1] = argv[0];
707         argv += optind - 1;
708         argc -= optind - 1;
709
710         if (argc < 2) {
711                 uci_usage();
712                 return 0;
713         }
714
715         if (!(flags & CLI_FLAG_NOPLUGINS))
716                 uci_load_plugins(ctx, NULL);
717
718         ret = uci_cmd(argc - 1, argv + 1);
719         if (input != stdin)
720                 fclose(input);
721
722         if (ret == 255)
723                 uci_usage();
724
725         uci_free_context(ctx);
726
727         return ret;
728 }