ptr->next = ptr;
}
-/* inserts a new list entry between two consecutive entries */
-static inline void __uci_list_add(struct uci_list *prev, struct uci_list *next, struct uci_list *ptr)
+/* inserts a new list entry after a given entry */
+static inline void uci_list_insert(struct uci_list *list, struct uci_list *ptr)
{
- next->prev = ptr;
- ptr->prev = prev;
- ptr->next = next;
- prev->next = ptr;
+ list->next->prev = ptr;
+ ptr->prev = list;
+ ptr->next = list->next;
+ list->next = ptr;
}
/* inserts a new list entry at the tail of the list */
static inline void uci_list_add(struct uci_list *head, struct uci_list *ptr)
{
/* NB: head->prev points at the tail */
- __uci_list_add(head->prev, head, ptr);
+ uci_list_insert(head->prev, ptr);
}
static inline void uci_list_del(struct uci_list *ptr)
uci_list_init(ptr);
}
+/*
+ * uci_alloc_generic allocates a new uci_element with payload
+ * payload is appended to the struct to save memory and reduce fragmentation
+ */
static struct uci_element *
-uci_alloc_generic(struct uci_context *ctx, const char *name, int size)
+uci_alloc_generic(struct uci_context *ctx, int type, const char *name, int size)
{
struct uci_element *e;
+ int datalen = size;
void *ptr;
- ptr = uci_malloc(ctx, size + strlen(name) + 1);
+ if (name)
+ datalen += strlen(name) + 1;
+ ptr = uci_malloc(ctx, datalen);
e = (struct uci_element *) ptr;
- e->name = (char *) ptr + size;
- strcpy(e->name, name);
+ e->type = type;
+ if (name) {
+ e->name = (char *) ptr + size;
+ strcpy(e->name, name);
+ }
uci_list_init(&e->list);
return e;
static void
uci_free_element(struct uci_element *e)
{
- if (!e)
- return;
-
if (!uci_list_empty(&e->list))
uci_list_del(&e->list);
free(e);
static inline void
uci_free_option(struct uci_option *o)
{
+ if ((o->value != uci_dataptr(o)) &&
+ (o->value != NULL))
+ free(o->value);
uci_free_element(&o->e);
}
uci_foreach_element_safe(&s->options, tmp, o) {
uci_free_option(uci_to_option(o));
}
+ if ((s->type != uci_dataptr(s)) &&
+ (s->type != NULL))
+ free(s->type);
uci_free_element(&s->e);
}
p = uci_alloc_element(ctx, package, name, 0);
p->ctx = ctx;
uci_list_init(&p->sections);
+ uci_list_init(&p->history);
return p;
}
if(!p)
return;
+ if (p->path)
+ free(p->path);
uci_foreach_element_safe(&p->sections, tmp, e) {
uci_free_section(uci_to_section(e));
}
uci_free_element(&p->e);
}
+/* record a change that was done to a package */
+static void
+uci_add_history(struct uci_context *ctx, struct uci_package *p, int cmd, char *section, char *option, char *value)
+{
+ struct uci_history *h;
+ int size = strlen(section) + 1;
+ char *ptr;
+
+ if (!p->confdir)
+ return;
+
+ if (value)
+ size += strlen(section) + 1;
-int uci_unload(struct uci_context *ctx, const char *name)
+ h = uci_alloc_element(ctx, history, option, size);
+ ptr = uci_dataptr(h);
+ h->cmd = cmd;
+ h->section = strcpy(ptr, section);
+ if (value) {
+ ptr += strlen(ptr) + 1;
+ h->value = strcpy(ptr, value);
+ }
+ uci_list_add(&p->history, &h->e.list);
+}
+
+static void
+uci_free_history(struct uci_history *h)
+{
+ if (!h)
+ return;
+ if ((h->section != NULL) &&
+ (h->section != uci_dataptr(h))) {
+ free(h->section);
+ free(h->value);
+ }
+ uci_free_element(&h->e);
+}
+
+static struct uci_element *uci_lookup_list(struct uci_context *ctx, struct uci_list *list, const char *name)
{
struct uci_element *e;
+ uci_foreach_element(list, e) {
+ if (!strcmp(e->name, name))
+ return e;
+ }
+ return NULL;
+}
+
+int uci_lookup(struct uci_context *ctx, struct uci_element **res, struct uci_package *p, char *section, char *option)
+{
+ struct uci_element *e;
+ struct uci_section *s;
+ struct uci_option *o;
+
UCI_HANDLE_ERR(ctx);
- UCI_ASSERT(ctx, name != NULL);
+ UCI_ASSERT(ctx, res != NULL);
+ UCI_ASSERT(ctx, p != NULL);
+ UCI_ASSERT(ctx, section != NULL);
- uci_foreach_element(&ctx->root, e) {
- if (!strcmp(e->name, name))
- goto found;
+ e = uci_lookup_list(ctx, &p->sections, section);
+ if (!e)
+ goto notfound;
+
+ if (option) {
+ s = uci_to_section(e);
+ e = uci_lookup_list(ctx, &s->options, option);
}
+
+ *res = e;
+ return 0;
+
+notfound:
UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+ return 0;
+}
+
+int uci_del_element(struct uci_context *ctx, struct uci_element *e)
+{
+ /* NB: UCI_INTERNAL use means without history tracking */
+ bool internal = ctx->internal;
+ struct uci_package *p = NULL;
+ struct uci_section *s = NULL;
+ struct uci_option *o = NULL;
+ struct uci_element *i, *tmp;
+ char *option = NULL;
-found:
- uci_free_package(uci_to_package(e));
+ UCI_HANDLE_ERR(ctx);
+ UCI_ASSERT(ctx, e != NULL);
+
+ switch(e->type) {
+ case UCI_TYPE_SECTION:
+ s = uci_to_section(e);
+ uci_foreach_element_safe(&s->options, tmp, i) {
+ uci_del_element(ctx, i);
+ }
+ break;
+ case UCI_TYPE_OPTION:
+ o = uci_to_option(e);
+ s = o->section;
+ p = s->package;
+ option = e->name;
+ break;
+ default:
+ UCI_THROW(ctx, UCI_ERR_INVAL);
+ break;
+ }
+ p = s->package;
+ if (!internal)
+ uci_add_history(ctx, p, UCI_CMD_REMOVE, s->e.name, option, NULL);
+
+ switch(e->type) {
+ case UCI_TYPE_SECTION:
+ uci_free_section(s);
+ break;
+ case UCI_TYPE_OPTION:
+ uci_free_option(o);
+ break;
+ default:
+ break;
+ }
return 0;
}
-static inline char *get_filename(char *path)
+int uci_set_element_value(struct uci_context *ctx, struct uci_element **element, char *value)
{
- char *p;
+ /* NB: UCI_INTERNAL use means without history tracking */
+ bool internal = ctx->internal;
+ struct uci_list *list;
+ struct uci_element *e;
+ struct uci_package *p;
+ struct uci_section *s;
+ char *section;
+ char *option;
+ char *str;
+ int size;
- p = strrchr(path, '/');
- p++;
- if (!*p)
- return NULL;
- return p;
+ UCI_HANDLE_ERR(ctx);
+ UCI_ASSERT(ctx, value != NULL);
+ UCI_ASSERT(ctx, element != NULL);
+ UCI_ASSERT(ctx, *element != NULL);
+
+ /* what the 'value' of an element means depends on the type
+ * for a section, the 'value' means its type
+ * for an option, the 'value' means its value string
+ * when changing the value, shrink the element to its actual size
+ * (it may have been allocated with a bigger size, to include
+ * its buffer)
+ * then duplicate the string passed on the command line and
+ * insert it into the structure.
+ */
+ e = *element;
+ list = e->list.prev;
+ switch(e->type) {
+ case UCI_TYPE_SECTION:
+ size = sizeof(struct uci_section);
+ s = uci_to_section(e);
+ section = e->name;
+ option = NULL;
+ break;
+ case UCI_TYPE_OPTION:
+ size = sizeof(struct uci_option);
+ s = uci_to_option(e)->section;
+ section = s->e.name;
+ option = e->name;
+ break;
+ default:
+ UCI_THROW(ctx, UCI_ERR_INVAL);
+ return 0;
+ }
+ p = s->package;
+ if (!internal)
+ uci_add_history(ctx, p, UCI_CMD_CHANGE, section, option, value);
+
+ uci_list_del(&e->list);
+ e = uci_realloc(ctx, e, size);
+ str = uci_strdup(ctx, value);
+ uci_list_insert(list, &e->list);
+ *element = e;
+
+ switch(e->type) {
+ case UCI_TYPE_SECTION:
+ uci_to_section(e)->type = str;
+ break;
+ case UCI_TYPE_OPTION:
+ uci_to_option(e)->value = str;
+ break;
+ default:
+ break;
+ }
+
+ return 0;
}
-char **uci_list_configs(struct uci_context *ctx)
+int uci_del(struct uci_context *ctx, struct uci_package *p, char *section, char *option)
{
- char **configs;
- glob_t globbuf;
- int size, i;
- char *buf;
+ /* NB: pass on internal flag to uci_del_element */
+ bool internal = ctx->internal;
+ struct uci_element *e;
+ struct uci_section *s = NULL;
+ struct uci_option *o = NULL;
+
+ UCI_HANDLE_ERR(ctx);
+ UCI_ASSERT(ctx, p != NULL);
+ UCI_ASSERT(ctx, section != NULL);
- if (glob(UCI_CONFDIR "/*", GLOB_MARK, NULL, &globbuf) != 0)
- return NULL;
+ UCI_INTERNAL(uci_lookup, ctx, &e, p, section, option);
- size = sizeof(char *) * (globbuf.gl_pathc + 1);
- for(i = 0; i < globbuf.gl_pathc; i++) {
- char *p;
+ if (!internal)
+ return uci_del_element(ctx, e);
+ UCI_INTERNAL(uci_del_element, ctx, e);
- p = get_filename(globbuf.gl_pathv[i]);
- if (!p)
- continue;
+ return 0;
+}
+
+int uci_set(struct uci_context *ctx, struct uci_package *p, char *section, char *option, char *value)
+{
+ /* NB: UCI_INTERNAL use means without history tracking */
+ bool internal = ctx->internal;
+ struct uci_element *e = NULL;
+ struct uci_section *s = NULL;
+ struct uci_option *o = NULL;
+ struct uci_history *h;
- size += strlen(p) + 1;
+ UCI_HANDLE_ERR(ctx);
+ UCI_ASSERT(ctx, p != NULL);
+ UCI_ASSERT(ctx, section != NULL);
+ UCI_ASSERT(ctx, value != NULL);
+
+ /*
+ * look up the package, section and option (if set)
+ * if the section/option is to be modified and it is not found
+ * create a new element in the appropriate list
+ */
+ UCI_INTERNAL(uci_lookup, ctx, &e, p, section, NULL);
+ s = uci_to_section(e);
+ if (option) {
+ e = uci_lookup_list(ctx, &s->options, option);
+ if (!e)
+ goto notfound;
+ o = uci_to_option(e);
}
- configs = malloc(size);
- if (!configs)
- return NULL;
+ /*
+ * no unknown element was supplied, assume that we can just update
+ * an existing entry
+ */
+ if (o)
+ e = &o->e;
+ else
+ e = &s->e;
+
+ if (!internal)
+ return uci_set_element_value(ctx, &e, value);
- memset(configs, 0, size);
- buf = (char *) &configs[globbuf.gl_pathc + 1];
- for(i = 0; i < globbuf.gl_pathc; i++) {
- char *p;
+ UCI_INTERNAL(uci_set_element_value, ctx, &e, value);
+ return 0;
- p = get_filename(globbuf.gl_pathv[i]);
- if (!p)
- continue;
+notfound:
+ /*
+ * the entry that we need to update was not found,
+ * check if the search failed prematurely.
+ * this can happen if the package was not found, or if
+ * an option was supplied, but the section wasn't found
+ */
+ if (!p || (!s && option))
+ UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+
+ /* now add the missing entry */
+ if (!internal)
+ uci_add_history(ctx, p, UCI_CMD_ADD, section, option, value);
+ if (s)
+ uci_alloc_option(s, option, value);
+ else
+ uci_alloc_section(p, value, section);
- configs[i] = buf;
- strcpy(buf, p);
- buf += strlen(buf) + 1;
- }
- return configs;
+ return 0;
}
+int uci_unload(struct uci_context *ctx, struct uci_package *p)
+{
+ struct uci_element *e;
+
+ UCI_HANDLE_ERR(ctx);
+ UCI_ASSERT(ctx, p != NULL);
+
+ uci_free_package(p);
+ return 0;
+}
projects / project / uci.git / blobdiff