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- #include <stdio.h>
- #include <stdlib.h>
- #include <unistd.h>
- #include <fcntl.h>
- #include "ubusmsg.h"
- #include "ubusd_id.h"
- static int random_fd = -1;
- static int ubus_cmp_id(const void *k1, const void *k2, void *ptr)
- {
- const uint32_t *id1 = k1, *id2 = k2;
- if (*id1 < *id2)
- return -1;
- else
- return *id1 > *id2;
- }
- static int ubus_cmp_str(const void *k1, const void *k2, void *ptr)
- {
- return strcmp(k1, k2);
- }
- void ubus_init_string_tree(struct avl_tree *tree, bool dup)
- {
- avl_init(tree, ubus_cmp_str, dup, NULL);
- }
- void ubus_init_id_tree(struct avl_tree *tree)
- {
- if (random_fd < 0) {
- random_fd = open("/dev/urandom", O_RDONLY);
- if (random_fd < 0) {
- perror("open");
- exit(1);
- }
- }
- avl_init(tree, ubus_cmp_id, false, NULL);
- }
- bool ubus_alloc_id(struct avl_tree *tree, struct ubus_id *id, uint32_t val)
- {
- id->avl.key = &id->id;
- if (val) {
- id->id = val;
- return avl_insert(tree, &id->avl) == 0;
- }
- do {
- if (read(random_fd, &id->id, sizeof(id->id)) != sizeof(id->id))
- return false;
- if (id->id < UBUS_SYSTEM_OBJECT_MAX)
- continue;
- } while (avl_insert(tree, &id->avl) != 0);
- return true;
- }
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