2 * Copyright (C) 1997-2007 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file attribute.c Attribute handling functions. */
15 static struct osl_table *attribute_table;
16 static int greatest_att_bitnum;
18 /** The columns of the attribute table. */
19 enum attribute_table_columns {
20 /** The bit number (0-63). */
22 /** The name of the attribute. */
24 /** Number of columns in this table. */
28 static int char_compare(const struct osl_object *obj1, const struct osl_object *obj2)
30 const unsigned char *c1 = (const unsigned char*)obj1->data;
31 const unsigned char *c2 = (const unsigned char*)obj2->data;
39 static struct osl_column_description att_cols[] = {
41 .storage_type = OSL_MAPPED_STORAGE,
42 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
44 .compare_function = char_compare,
48 .storage_type = OSL_MAPPED_STORAGE,
49 .storage_flags = OSL_RBTREE | OSL_UNIQUE,
51 .compare_function = string_compare,
55 static struct osl_table_description attribute_table_desc = {
57 .num_columns = NUM_ATT_COLUMNS,
59 .column_descriptions = att_cols
62 static void find_greatest_att_bitnum(void)
67 struct osl_object obj = {.data = &c, .size = 1};
68 if (osl_get_row(attribute_table, ATTCOL_BITNUM, &obj,
70 greatest_att_bitnum = c;
74 PARA_INFO_LOG("no attributes\n");
75 greatest_att_bitnum = -E_NO_ATTRIBUTES;
79 * Retrieve the identifier (number) of an attribute.
81 * \param att_name The name of the attribute.
82 * \param bitnum Result pointer.
84 * \return Positive on success, negative on errors.
86 int get_attribute_bitnum_by_name(const char *att_name, unsigned char *bitnum)
88 struct osl_object obj = {.data = (char *)att_name,
89 .size = strlen(att_name) + 1};
91 int ret = osl_get_row(attribute_table, ATTCOL_NAME, &obj, &row);
95 ret = osl_get_object(attribute_table, row, ATTCOL_BITNUM, &obj);
98 *bitnum = *(unsigned char *)obj.data;
103 * Flags used by the lsatt command.
105 * \param \sa com_lsatt().
108 /** Whether "-a" was given for the lsatt command. */
109 LSATT_FLAG_SORT_BY_ID = 1,
110 /** Whether "-l" was given for the lsatt command. */
112 /** Reverse sort order. */
113 LSATT_FLAG_REVERSE = 4
116 /** Data passed to the action function of lsatt */
117 struct lsatt_action_data {
118 /** The result buffer. */
119 struct para_buffer pb;
120 /** The given flags for the lsatt command. */
124 static int print_attribute(struct osl_table *table, struct osl_row *row,
125 const char *name, void *data)
127 struct lsatt_action_data *laad = data;
128 struct osl_object bitnum_obj;
131 if (!(laad->flags & LSATT_FLAG_LONG)) {
132 para_printf(&laad->pb, "%s\n", name);
135 ret = osl_get_object(table, row, ATTCOL_BITNUM, &bitnum_obj);
137 para_printf(&laad->pb, "%s: %s\n", name, PARA_STRERROR(-ret));
140 para_printf(&laad->pb, "%u\t%s\n", *(unsigned char*)bitnum_obj.data,
145 static int com_lsatt_callback(const struct osl_object *query,
146 struct osl_object *result)
148 struct lsatt_action_data laad = {.flags = *(unsigned *) query->data};
149 struct pattern_match_data pmd = {
150 .table = attribute_table,
151 .loop_col_num = ATTCOL_BITNUM,
152 .match_col_num = ATTCOL_NAME,
153 .patterns = {.data = (char *)query->data + sizeof(laad.flags),
154 .size = query->size - sizeof(laad.flags)},
155 .pm_flags = PM_NO_PATTERN_MATCHES_EVERYTHING,
157 .action = print_attribute
161 if (laad.flags & LSATT_FLAG_SORT_BY_ID)
162 pmd.loop_col_num = ATTCOL_NAME;
163 if (laad.flags & LSATT_FLAG_REVERSE)
164 pmd.pm_flags |= PM_REVERSE_LOOP;
165 ret = for_each_matching_row(&pmd);
167 para_printf(&laad.pb, "%s\n", PARA_STRERROR(-ret));
170 result->data = laad.pb.buf;
171 result->size = laad.pb.size;
175 int com_lsatt(int fd, int argc, char * const * const argv)
178 struct osl_object options = {.data = &flags, .size = sizeof(flags)},
182 for (i = 1; i < argc; i++) {
183 const char *arg = argv[i];
186 if (!strcmp(arg, "--")) {
190 if (!strcmp(arg, "-i")) {
191 flags |= LSATT_FLAG_SORT_BY_ID;
194 if (!strcmp(arg, "-l")) {
195 flags |= LSATT_FLAG_LONG;
198 if (!strcmp(arg, "-r")) {
199 flags |= LSATT_FLAG_REVERSE;
203 ret = send_option_arg_callback_request(&options, argc -i, argv + i,
204 com_lsatt_callback, &result);
206 ret = send_buffer(fd, (char *)result.data);
209 send_va_buffer(fd, "%s\n", PARA_STRERROR(-ret));
213 static int com_setatt_callback(const struct osl_object *query,
214 __a_unused struct osl_object *result)
217 uint64_t add_mask = 0, del_mask = 0;
220 struct osl_object obj;
223 for (p = query->data; p < (char *)query->data + query->size; p += len + 1) {
228 return -E_ATTR_SYNTAX;
230 if (c != '+' && c != '-')
235 ret = osl_get_row(attribute_table, ATTCOL_NAME, &obj, &row);
238 ret = osl_get_object(attribute_table, row, ATTCOL_BITNUM,
243 add_mask |= (1UL << *(unsigned char *)obj.data);
245 del_mask |= (1UL << *(unsigned char *)obj.data);
247 if (!add_mask && !del_mask)
248 return -E_ATTR_SYNTAX;
249 PARA_DEBUG_LOG("masks: %llx:%llx\n",(long long unsigned)add_mask,
250 (long long unsigned)del_mask);
251 for (; p < (char *)query->data + query->size; p += len + 1) { /* TODO: fnmatch */
252 struct afs_info old_afsi, new_afsi;
253 struct afsi_change_event_data aced = {.old_afsi = &old_afsi};
256 ret = aft_get_row_of_path(p, &aced.aft_row);
259 ret = get_afsi_object_of_row(aced.aft_row, &obj);
262 ret = load_afsi(&old_afsi, &obj);
266 new_afsi.attributes |= add_mask;
267 new_afsi.attributes &= ~del_mask;
268 save_afsi(&new_afsi, &obj); /* in-place update */
269 afs_event(AFSI_CHANGE, NULL, &aced);
274 int com_setatt(__a_unused int fd, int argc, char * const * const argv)
277 return -E_ATTR_SYNTAX;
278 return send_standard_callback_request(argc - 1, argv + 1, com_setatt_callback,
282 struct addatt_event_data {
284 unsigned char bitnum;
288 static int com_addatt_callback(const struct osl_object *query,
289 struct osl_object *result)
291 char *p = query->data;
293 struct para_buffer pb = {.size = 0};
296 for (p = query->data; p < (char *)query->data + query->size; p += len + 1) {
297 struct osl_object objs[NUM_ATT_COLUMNS];
299 unsigned char bitnum;
301 struct addatt_event_data aed;
303 if (!len || p[len - 1] == '-' || p[len - 1] == '+') {
304 para_printf(&pb, "invalid attribute name: %s\n", p);
307 ret = get_attribute_bitnum_by_name(p, &bitnum);
309 para_printf(&pb, "attribute \"%s\" already exists\n", p);
312 if (ret != -E_RB_KEY_NOT_FOUND) /* error */
314 objs[ATTCOL_BITNUM].size = 1;
315 /* find smallest unused attribute */
316 for (bitnum = 0; bitnum < 64; bitnum++) {
317 objs[ATTCOL_BITNUM].data = &bitnum;
318 ret = osl_get_row(attribute_table, ATTCOL_BITNUM,
319 &objs[ATTCOL_BITNUM], &row);
320 if (ret == -E_RB_KEY_NOT_FOUND)
321 break; /* this bitnum is unused, use it */
322 if (ret < 0) /* error */
324 /* this bit is already in use, try next bit */
327 ret = -E_ATT_TABLE_FULL;
330 objs[ATTCOL_NAME].data = p;
331 objs[ATTCOL_NAME].size = len + 1;
332 ret = osl_add_row(attribute_table, objs);
337 afs_event(ATTRIBUTE_ADD, &pb, &aed);
338 greatest_att_bitnum = PARA_MAX(greatest_att_bitnum, bitnum);
342 para_printf(&pb, "%s: %s\n", p, PARA_STRERROR(-ret));
343 result->data = pb.buf;
344 result->size = pb.size;
345 return result->data? 0 : 1;
348 int com_addatt(int fd, int argc, char * const * const argv)
350 struct osl_object result;
354 return -E_ATTR_SYNTAX;
355 ret = send_standard_callback_request(argc - 1, argv + 1, com_addatt_callback,
361 if (!result.data || !result.size)
363 ret = send_va_buffer(fd, "%s", (char *) result.data);
368 static int com_mvatt_callback(const struct osl_object *query,
369 struct osl_object *result)
371 char *old = query->data;
372 size_t size = strlen(old) + 1;
373 char *new = old + size;
374 struct osl_object obj = {.data = old, .size = size};
376 struct para_buffer pb = {.size = 0};
379 ret = osl_get_row(attribute_table, ATTCOL_NAME, &obj, &row);
383 obj.size = strlen(new) + 1;
384 ret = osl_update_object(attribute_table, row, ATTCOL_NAME, &obj);
387 para_printf(&pb, "%s\n", PARA_STRERROR(-ret));
389 afs_event(ATTRIBUTE_RENAME, &pb, NULL);
392 result->data = pb.buf;
393 result->size = pb.size;
397 int com_mvatt(int fd, int argc, char * const * const argv)
399 struct osl_object result;
403 return -E_ATTR_SYNTAX;
404 ret = send_standard_callback_request(argc - 1, argv + 1, com_mvatt_callback,
410 if (!result.data || !result.size)
412 ret = send_va_buffer(fd, "%s", (char *) result.data);
417 /** Data passed to the action handler of com_rmatt(). */
418 struct remove_attribute_action_data {
419 /** Message buffer. */
420 struct para_buffer pb;
421 /** Numver of attributes removed. */
423 /** Bitwise "or" of the removed attributes. */
424 uint64_t mask_of_removed_atts;
427 static int remove_attribute(struct osl_table *table, struct osl_row *row,
428 const char *name, void *data)
430 struct remove_attribute_action_data *raad = data;
432 struct rmatt_event_data red = {.name = name};
434 ret = get_attribute_bitnum_by_name(name, &red.bitnum);
436 para_printf(&raad->pb, "%s: %s\n", name, PARA_STRERROR(-ret));
439 ret = osl_del_row(table, row);
441 para_printf(&raad->pb, "%s: %s\n", name, PARA_STRERROR(-ret));
444 para_printf(&raad->pb, "removed attribute %s\n", name);
446 raad->mask_of_removed_atts |= (1 << red.bitnum);
447 afs_event(ATTRIBUTE_REMOVE, &raad->pb, &red);
451 static int com_rmatt_callback(const struct osl_object *query,
452 struct osl_object *result)
454 struct remove_attribute_action_data raad = {.num_removed = 0};
456 struct pattern_match_data pmd = {
457 .table = attribute_table,
459 .loop_col_num = ATTCOL_BITNUM,
460 .match_col_num = ATTCOL_NAME,
462 .action = remove_attribute
464 ret = for_each_matching_row(&pmd);
466 para_printf(&raad.pb, "%s\n", PARA_STRERROR(-ret));
467 if (!raad.num_removed)
468 para_printf(&raad.pb, "no match -- nothing removed\n");
469 result->data = raad.pb.buf;
470 result->size = raad.pb.size;
474 int com_rmatt(int fd, int argc, char * const * const argv)
477 struct osl_object result;
480 return -E_ATTR_SYNTAX;
481 ret = send_standard_callback_request(argc - 1, argv + 1, com_rmatt_callback,
484 send_buffer(fd, (char *)result.data);
487 send_va_buffer(fd, "%s\n", PARA_STRERROR(-ret));
492 * Return a binary representation of the given attribute value.
494 * \param atts Pointer to the attribute value.
497 * This function prints a string of at most 64 characters plus the terminating
498 * \p NULL character into \a buf which must be provided by the caller and at
499 * least 65 bytes long. The "x" character is used for set attributes and "-" is
500 * used for unset attributes.
502 * In practice, not all 64 attributes are defined. In this case, the function
503 * only prints \a N + 1 charaters where \a N is the greatest id of a defined
506 void get_attribute_bitmap(const uint64_t *atts, char *buf)
509 const uint64_t one = 1;
511 for (i = 0; i <= greatest_att_bitnum; i++)
512 buf[greatest_att_bitnum - i] = (*atts & (one << i))? 'x' : '-';
517 * Get a string containing the set attributes in text form.
519 * \param atts The attribute bitmap.
520 * \param delim The delimiter to separate matching attribute names.
521 * \param text Result pointer.
523 * \return Positive on success, negative on errors. If no attributes have
524 * been defined, \a *text is NULL.
526 int get_attribute_text(uint64_t *atts, const char *delim, char **text)
529 const uint64_t one = 1;
532 if (greatest_att_bitnum < 0) { /* no attributes available */
533 *text = para_strdup("(no attributes available)");
536 for (i = 0; i <= greatest_att_bitnum; i++) {
537 unsigned char bn = i;
538 struct osl_object obj = {.data = &bn, .size = 1};
541 if (!(*atts & (one << i)))
543 ret = osl_get_row(attribute_table, ATTCOL_BITNUM, &obj, &row);
546 ret = osl_get_object(attribute_table, row, ATTCOL_NAME, &obj);
550 char *tmp = make_message("%s%s%s", *text, delim, (char *)obj.data);
554 *text = para_strdup(obj.data);
556 if (!*text) /* no attributes set */
557 *text = para_strdup("");
565 * Close the attribute table.
567 * \sa osl_close_table().
569 void attribute_close(void)
571 osl_close_table(attribute_table, OSL_MARK_CLEAN);
572 attribute_table = NULL;
576 * Open the attribute table.
578 * \param ti Gets initialized by this function.
579 * \param db The database directory.
581 * \return Positive on success, negative on errors.
583 * \sa osl_open_table().
585 static int attribute_open(const char *dir)
589 attribute_table_desc.dir = dir;
590 ret = osl_open_table(&attribute_table_desc, &attribute_table);
591 greatest_att_bitnum = -1; /* no atts available */
593 find_greatest_att_bitnum();
596 attribute_table = NULL;
597 if (ret >= 0 || is_errno(-ret, ENOENT))
602 static int attribute_create(const char *dir)
604 attribute_table_desc.dir = dir;
605 return osl_create_table(&attribute_table_desc);
609 void attribute_init(struct afs_table *t)
611 t->name = attribute_table_desc.name;
612 t->open = attribute_open;
613 t->close = attribute_close;
614 t->create = attribute_create;