X-Git-Url: https://git.archive.openwrt.org/?p=project%2Fuci.git;a=blobdiff_plain;f=list.c;h=67bde395abf3ca3a56b8d725bd4e95f5d74abc3d;hp=c6b7ebc87743e12f2bb499ac93050461a3c0c5a1;hb=c4226c1a45e70346933a1985e159f3eff9d380a5;hpb=5620bfaa14ce556b94de26128bc7fe9edc5a3f27

diff --git a/list.c b/list.c
index c6b7ebc..67bde39 100644
--- a/list.c
+++ b/list.c
@@ -74,7 +74,7 @@ uci_alloc_generic(struct uci_context *ctx, int type, const char *name, int size)
 
 error:
 	free(ptr);
-	UCI_THROW(ctx, ctx->errno);
+	UCI_THROW(ctx, ctx->err);
 
 done:
 	return e;
@@ -115,6 +115,34 @@ uci_free_option(struct uci_option *o)
 	uci_free_element(&o->e);
 }
 
+/* fix up an unnamed section, e.g. after adding options to it */
+static void uci_fixup_section(struct uci_context *ctx, struct uci_section *s)
+{
+	unsigned int hash = ~0;
+	struct uci_element *e;
+	char buf[16];
+
+	if (!s || s->e.name)
+		return;
+
+	/*
+	 * Generate a name for unnamed sections. This is used as reference
+	 * when locating or updating the section from apps/scripts.
+	 * To make multiple concurrent versions somewhat safe for updating,
+	 * the name is generated from a hash of its type and name/value
+	 * pairs of its option, and it is prefixed by a counter value.
+	 * If the order of the unnamed sections changes for some reason,
+	 * updates to them will be rejected.
+	 */
+	hash = djbhash(hash, s->type);
+	uci_foreach_element(&s->options, e) {
+		hash = djbhash(hash, e->name);
+		hash = djbhash(hash, uci_to_option(e)->value);
+	}
+	sprintf(buf, "cfg%02x%04x", ++s->package->n_section, hash % (1 << 16));
+	s->e.name = uci_strdup(ctx, buf);
+}
+
 static struct uci_section *
 uci_alloc_section(struct uci_package *p, const char *type, const char *name)
 {
@@ -131,6 +159,7 @@ uci_alloc_section(struct uci_package *p, const char *type, const char *name)
 	strcpy(s->type, type);
 	if (name == NULL)
 		s->anonymous = true;
+	p->n_section++;
 
 	uci_list_add(&p->sections, &s->e.list);
 
@@ -151,7 +180,7 @@ uci_free_section(struct uci_section *s)
 	uci_free_element(&s->e);
 }
 
-static struct uci_package *
+__plugin struct uci_package *
 uci_alloc_package(struct uci_context *ctx, const char *name)
 {
 	struct uci_package *p;
@@ -188,7 +217,7 @@ uci_free_package(struct uci_package **package)
 	*package = NULL;
 }
 
-static struct uci_element *uci_lookup_list(struct uci_context *ctx, struct uci_list *list, const char *name)
+static struct uci_element *uci_lookup_list(struct uci_list *list, const char *name)
 {
 	struct uci_element *e;
 
@@ -199,7 +228,7 @@ static struct uci_element *uci_lookup_list(struct uci_context *ctx, struct uci_l
 	return NULL;
 }
 
-int uci_lookup(struct uci_context *ctx, struct uci_element **res, struct uci_package *p, char *section, char *option)
+int uci_lookup(struct uci_context *ctx, struct uci_element **res, struct uci_package *p, const char *section, const char *option)
 {
 	struct uci_element *e;
 	struct uci_section *s;
@@ -207,17 +236,17 @@ int uci_lookup(struct uci_context *ctx, struct uci_element **res, struct uci_pac
 	UCI_HANDLE_ERR(ctx);
 	UCI_ASSERT(ctx, res != NULL);
 	UCI_ASSERT(ctx, p != NULL);
-	UCI_ASSERT(ctx, uci_validate_name(section));
+	UCI_ASSERT(ctx, section && uci_validate_name(section));
 	if (option)
 		UCI_ASSERT(ctx, uci_validate_name(option));
 
-	e = uci_lookup_list(ctx, &p->sections, section);
+	e = uci_lookup_list(&p->sections, section);
 	if (!e)
 		goto notfound;
 
 	if (option) {
 		s = uci_to_section(e);
-		e = uci_lookup_list(ctx, &s->options, option);
+		e = uci_lookup_list(&s->options, option);
 		if (!e)
 			goto notfound;
 	}
@@ -262,7 +291,7 @@ int uci_del_element(struct uci_context *ctx, struct uci_element *e)
 	}
 
 	p = s->package;
-	if (!internal && p->confdir)
+	if (!internal && p->has_history)
 		uci_add_history(ctx, &p->history, UCI_CMD_REMOVE, s->e.name, option, NULL);
 
 	switch(e->type) {
@@ -278,7 +307,7 @@ int uci_del_element(struct uci_context *ctx, struct uci_element *e)
 	return 0;
 }
 
-int uci_set_element_value(struct uci_context *ctx, struct uci_element **element, char *value)
+int uci_set_element_value(struct uci_context *ctx, struct uci_element **element, const char *value)
 {
 	/* NB: UCI_INTERNAL use means without history tracking */
 	bool internal = ctx->internal;
@@ -312,6 +341,9 @@ int uci_set_element_value(struct uci_context *ctx, struct uci_element **element,
 		s = uci_to_section(e);
 		section = e->name;
 		option = NULL;
+		/* matches the currently set value */
+		if (!strcmp(value, s->type))
+			return 0;
 		break;
 	case UCI_TYPE_OPTION:
 		UCI_ASSERT(ctx, value != NULL);
@@ -319,13 +351,16 @@ int uci_set_element_value(struct uci_context *ctx, struct uci_element **element,
 		s = uci_to_option(e)->section;
 		section = s->e.name;
 		option = e->name;
+		/* matches the currently set value */
+		if (!strcmp(value, e->name))
+			return 0;
 		break;
 	default:
 		UCI_THROW(ctx, UCI_ERR_INVAL);
 		return 0;
 	}
 	p = s->package;
-	if (!internal && p->confdir)
+	if (!internal && p->has_history)
 		uci_add_history(ctx, &p->history, UCI_CMD_CHANGE, section, option, value);
 
 	uci_list_del(&e->list);
@@ -359,7 +394,7 @@ int uci_rename(struct uci_context *ctx, struct uci_package *p, char *section, ch
 	/* NB: p, section, option validated by uci_lookup */
 	UCI_INTERNAL(uci_lookup, ctx, &e, p, section, option);
 
-	if (!internal && p->confdir)
+	if (!internal && p->has_history)
 		uci_add_history(ctx, &p->history, UCI_CMD_RENAME, section, option, name);
 
 	name = uci_strdup(ctx, name);
@@ -370,8 +405,23 @@ int uci_rename(struct uci_context *ctx, struct uci_package *p, char *section, ch
 	return 0;
 }
 
+int uci_add_section(struct uci_context *ctx, struct uci_package *p, const char *type, struct uci_section **res)
+{
+	bool internal = ctx->internal;
+	struct uci_section *s;
+
+	UCI_HANDLE_ERR(ctx);
+	UCI_ASSERT(ctx, p != NULL);
+	s = uci_alloc_section(p, type, NULL);
+	uci_fixup_section(ctx, s);
+	*res = s;
+	if (!internal && p->has_history)
+		uci_add_history(ctx, &p->history, UCI_CMD_ADD, s->e.name, NULL, type);
 
-int uci_delete(struct uci_context *ctx, struct uci_package *p, char *section, char *option)
+	return 0;
+}
+
+int uci_delete(struct uci_context *ctx, struct uci_package *p, const char *section, const char *option)
 {
 	/* NB: pass on internal flag to uci_del_element */
 	bool internal = ctx->internal;
@@ -386,7 +436,7 @@ int uci_delete(struct uci_context *ctx, struct uci_package *p, char *section, ch
 	return uci_del_element(ctx, e);
 }
 
-int uci_set(struct uci_context *ctx, struct uci_package *p, char *section, char *option, char *value, struct uci_element **result)
+int uci_set(struct uci_context *ctx, struct uci_package *p, const char *section, const char *option, const char *value, struct uci_element **result)
 {
 	/* NB: UCI_INTERNAL use means without history tracking */
 	bool internal = ctx->internal;
@@ -409,7 +459,7 @@ int uci_set(struct uci_context *ctx, struct uci_package *p, char *section, char
 	 * if the section/option is to be modified and it is not found
 	 * create a new element in the appropriate list
 	 */
-	e = uci_lookup_list(ctx, &p->sections, section);
+	e = uci_lookup_list(&p->sections, section);
 	if (!e)
 		goto notfound;
 
@@ -418,7 +468,7 @@ int uci_set(struct uci_context *ctx, struct uci_package *p, char *section, char
 		ctx->pctx->section = s;
 
 	if (option) {
-		e = uci_lookup_list(ctx, &s->options, option);
+		e = uci_lookup_list(&s->options, option);
 		if (!e)
 			goto notfound;
 		o = uci_to_option(e);
@@ -451,8 +501,8 @@ notfound:
 		UCI_THROW(ctx, UCI_ERR_NOTFOUND);
 
 	/* now add the missing entry */
-	if (!internal && p->confdir)
-		uci_add_history(ctx, &p->history, UCI_CMD_ADD, section, option, value);
+	if (!internal && p->has_history)
+		uci_add_history(ctx, &p->history, UCI_CMD_CHANGE, section, option, value);
 	if (s) {
 		o = uci_alloc_option(s, option, value);
 		if (result)