--- /dev/null
+--- a/Makefile
++++ b/Makefile
+@@ -7,7 +7,7 @@ DEBUG_TYPECAST=0
+
+ include Makefile.inc
+
+-LIBS=-lc
++LIBS=-lc -ldl
+ SHLIB_FILE=libuci.$(SHLIB_EXT).$(VERSION)
+
+ define add_feature
+@@ -23,6 +23,7 @@ ucimap.o: ucimap.c uci.h uci_config.h uc
+
+ uci_config.h: FORCE
+ @rm -f "$@.tmp"
++ @echo "#define UCI_PREFIX \"$(prefix)\"" > "$@.tmp"
+ $(call add_feature,PLUGIN_SUPPORT)
+ $(call add_feature,DEBUG)
+ $(call add_feature,DEBUG_TYPECAST)
+@@ -33,10 +34,10 @@ uci_config.h: FORCE
+ fi
+
+ uci: cli.o libuci.$(SHLIB_EXT)
+- $(CC) -o $@ $< -L. -luci
++ $(CC) -o $@ $< -L. -luci $(LIBS)
+
+ uci-static: cli.o libuci.a
+- $(CC) $(CFLAGS) -o $@ $^
++ $(CC) $(CFLAGS) -o $@ $^ $(LIBS)
+
+ libuci-static.o: libuci.c $(LIBUCI_DEPS)
+ $(CC) $(CFLAGS) -c -o $@ $<
+--- a/cli.c
++++ b/cli.c
+@@ -27,6 +27,7 @@ static enum {
+ CLI_FLAG_NOCOMMIT = (1 << 2),
+ CLI_FLAG_BATCH = (1 << 3),
+ CLI_FLAG_SHOW_EXT = (1 << 4),
++ CLI_FLAG_NOPLUGINS= (1 << 5),
+ } flags;
+
+ static FILE *input;
+@@ -136,6 +137,7 @@ static void uci_usage(void)
+ "\t-c <path> set the search path for config files (default: /etc/config)\n"
+ "\t-d <str> set the delimiter for list values in uci show\n"
+ "\t-f <file> use <file> as input instead of stdin\n"
++ "\t-L do not load any plugins\n"
+ "\t-m when importing, merge data into an existing package\n"
+ "\t-n name unnamed sections on export (default)\n"
+ "\t-N don't name unnamed sections\n"
+@@ -603,7 +605,7 @@ int main(int argc, char **argv)
+ return 1;
+ }
+
+- while((c = getopt(argc, argv, "c:d:f:mnNp:P:sSqX")) != -1) {
++ while((c = getopt(argc, argv, "c:d:f:LmnNp:P:sSqX")) != -1) {
+ switch(c) {
+ case 'c':
+ uci_set_confdir(ctx, optarg);
+@@ -618,6 +620,9 @@ int main(int argc, char **argv)
+ return 1;
+ }
+ break;
++ case 'L':
++ flags |= CLI_FLAG_NOPLUGINS;
++ break;
+ case 'm':
+ flags |= CLI_FLAG_MERGE;
+ break;
+@@ -662,6 +667,10 @@ int main(int argc, char **argv)
+ uci_usage();
+ return 0;
+ }
++
++ if (!(flags & CLI_FLAG_NOPLUGINS))
++ uci_load_plugins(ctx, NULL);
++
+ ret = uci_cmd(argc - 1, argv + 1);
+ if (input != stdin)
+ fclose(input);
+--- a/history.c
++++ b/history.c
+@@ -406,6 +406,17 @@ int uci_save(struct uci_context *ctx, st
+ if ((asprintf(&filename, "%s/%s", ctx->savedir, p->e.name) < 0) || !filename)
+ UCI_THROW(ctx, UCI_ERR_MEM);
+
++ uci_foreach_element(&ctx->hooks, tmp) {
++ struct uci_hook *hook = uci_to_hook(tmp);
++
++ if (!hook->ops->set)
++ continue;
++
++ uci_foreach_element(&p->history, e) {
++ hook->ops->set(hook->ops, p, uci_to_history(e));
++ }
++ }
++
+ ctx->err = 0;
+ UCI_TRAP_SAVE(ctx, done);
+ f = uci_open_stream(ctx, filename, SEEK_END, true, true);
+--- a/libuci.c
++++ b/libuci.c
+@@ -22,6 +22,8 @@
+ #include <string.h>
+ #include <stdlib.h>
+ #include <stdio.h>
++#include <dlfcn.h>
++#include <glob.h>
+ #include "uci.h"
+
+ static const char *uci_confdir = UCI_CONFDIR;
+@@ -39,6 +41,7 @@ static const char *uci_errstr[] = {
+ };
+
+ static void uci_cleanup(struct uci_context *ctx);
++static void uci_unload_plugin(struct uci_context *ctx, struct uci_plugin *p);
+
+ #include "uci_internal.h"
+ #include "util.c"
+@@ -56,6 +59,8 @@ struct uci_context *uci_alloc_context(vo
+ uci_list_init(&ctx->root);
+ uci_list_init(&ctx->history_path);
+ uci_list_init(&ctx->backends);
++ uci_list_init(&ctx->hooks);
++ uci_list_init(&ctx->plugins);
+ ctx->flags = UCI_FLAG_STRICT | UCI_FLAG_SAVED_HISTORY;
+
+ ctx->confdir = (char *) uci_confdir;
+@@ -86,6 +91,9 @@ void uci_free_context(struct uci_context
+ uci_free_element(e);
+ }
+ UCI_TRAP_RESTORE(ctx);
++ uci_foreach_element_safe(&ctx->root, tmp, e) {
++ uci_unload_plugin(ctx, uci_to_plugin(e));
++ }
+ free(ctx);
+
+ ignore:
+@@ -209,9 +217,16 @@ int uci_commit(struct uci_context *ctx,
+ int uci_load(struct uci_context *ctx, const char *name, struct uci_package **package)
+ {
+ struct uci_package *p;
++ struct uci_element *e;
++
+ UCI_HANDLE_ERR(ctx);
+ UCI_ASSERT(ctx, ctx->backend && ctx->backend->load);
+ p = ctx->backend->load(ctx, name);
++ uci_foreach_element(&ctx->hooks, e) {
++ struct uci_hook *h = uci_to_hook(e);
++ if (h->ops->load)
++ h->ops->load(h->ops, p);
++ }
+ if (package)
+ *package = p;
+
+@@ -280,3 +295,94 @@ int uci_set_backend(struct uci_context *
+ ctx->backend = uci_to_backend(e);
+ return 0;
+ }
++
++int uci_add_hook(struct uci_context *ctx, const struct uci_hook_ops *ops)
++{
++ struct uci_element *e;
++ struct uci_hook *h;
++
++ UCI_HANDLE_ERR(ctx);
++
++ /* check for duplicate elements */
++ uci_foreach_element(&ctx->hooks, e) {
++ h = uci_to_hook(e);
++ if (h->ops == ops)
++ return UCI_ERR_INVAL;
++ }
++
++ h = uci_alloc_element(ctx, hook, "", 0);
++ h->ops = ops;
++ uci_list_init(&h->e.list);
++ uci_list_add(&ctx->hooks, &h->e.list);
++
++ return 0;
++}
++
++int uci_remove_hook(struct uci_context *ctx, const struct uci_hook_ops *ops)
++{
++ struct uci_element *e;
++
++ uci_foreach_element(&ctx->hooks, e) {
++ struct uci_hook *h = uci_to_hook(e);
++ if (h->ops == ops) {
++ uci_list_del(&e->list);
++ return 0;
++ }
++ }
++ return UCI_ERR_NOTFOUND;
++}
++
++int uci_load_plugin(struct uci_context *ctx, const char *filename)
++{
++ struct uci_plugin *p;
++ const struct uci_plugin_ops *ops;
++ void *dlh;
++
++ UCI_HANDLE_ERR(ctx);
++ dlh = dlopen(filename, RTLD_GLOBAL|RTLD_NOW);
++ if (!dlh)
++ UCI_THROW(ctx, UCI_ERR_NOTFOUND);
++
++ ops = dlsym(dlh, "uci_plugin");
++ if (!ops || !ops->attach || (ops->attach(ctx) != 0)) {
++ if (!ops)
++ fprintf(stderr, "No ops\n");
++ else if (!ops->attach)
++ fprintf(stderr, "No attach\n");
++ else
++ fprintf(stderr, "Other weirdness\n");
++ dlclose(dlh);
++ UCI_THROW(ctx, UCI_ERR_INVAL);
++ }
++
++ p = uci_alloc_element(ctx, plugin, filename, 0);
++ p->dlh = dlh;
++ p->ops = ops;
++ uci_list_add(&ctx->plugins, &p->e.list);
++
++ return 0;
++}
++
++static void uci_unload_plugin(struct uci_context *ctx, struct uci_plugin *p)
++{
++ if (p->ops->detach)
++ p->ops->detach(ctx);
++ dlclose(p->dlh);
++ uci_free_element(&p->e);
++}
++
++int uci_load_plugins(struct uci_context *ctx, const char *pattern)
++{
++ glob_t gl;
++ int i;
++
++ if (!pattern)
++ pattern = UCI_PREFIX "/lib/uci_*.so";
++
++ memset(&gl, 0, sizeof(gl));
++ glob(pattern, 0, NULL, &gl);
++ for (i = 0; i < gl.gl_pathc; i++)
++ uci_load_plugin(ctx, gl.gl_pathv[i]);
++
++ return 0;
++}
+--- a/uci.h
++++ b/uci.h
+@@ -56,6 +56,8 @@ struct uci_list
+ };
+
+ struct uci_ptr;
++struct uci_plugin;
++struct uci_hook_ops;
+ struct uci_element;
+ struct uci_package;
+ struct uci_section;
+@@ -275,6 +277,43 @@ extern int uci_set_backend(struct uci_co
+ */
+ extern bool uci_validate_text(const char *str);
+
++
++/**
++ * uci_add_hook: add a uci hook
++ * @ctx: uci context
++ * @ops: uci hook ops
++ *
++ * NB: allocated and freed by the caller
++ */
++extern int uci_add_hook(struct uci_context *ctx, const struct uci_hook_ops *ops);
++
++/**
++ * uci_remove_hook: remove a uci hook
++ * @ctx: uci context
++ * @ops: uci hook ops
++ */
++extern int uci_remove_hook(struct uci_context *ctx, const struct uci_hook_ops *ops);
++
++/**
++ * uci_load_plugin: load an uci plugin
++ * @ctx: uci context
++ * @filename: path to the uci plugin
++ *
++ * NB: plugin will be unloaded automatically when the context is freed
++ */
++int uci_load_plugin(struct uci_context *ctx, const char *filename);
++
++/**
++ * uci_load_plugins: load all uci plugins from a directory
++ * @ctx: uci context
++ * @pattern: pattern of uci plugin files (optional)
++ *
++ * if pattern is NULL, then uci_load_plugins will call uci_load_plugin
++ * for uci_*.so in <prefix>/lib/
++ */
++int uci_load_plugins(struct uci_context *ctx, const char *pattern);
++
++
+ /* UCI data structures */
+ enum uci_type {
+ UCI_TYPE_UNSPEC = 0,
+@@ -285,6 +324,8 @@ enum uci_type {
+ UCI_TYPE_PATH = 5,
+ UCI_TYPE_BACKEND = 6,
+ UCI_TYPE_ITEM = 7,
++ UCI_TYPE_HOOK = 8,
++ UCI_TYPE_PLUGIN = 9,
+ };
+
+ enum uci_option_type {
+@@ -346,6 +387,9 @@ struct uci_context
+ bool internal, nested;
+ char *buf;
+ int bufsz;
++
++ struct uci_list hooks;
++ struct uci_list plugins;
+ };
+
+ struct uci_package
+@@ -420,6 +464,31 @@ struct uci_ptr
+ const char *value;
+ };
+
++struct uci_hook_ops
++{
++ void (*load)(const struct uci_hook_ops *ops, struct uci_package *p);
++ void (*set)(const struct uci_hook_ops *ops, struct uci_package *p, struct uci_history *e);
++};
++
++struct uci_hook
++{
++ struct uci_element e;
++ const struct uci_hook_ops *ops;
++};
++
++struct uci_plugin_ops
++{
++ int (*attach)(struct uci_context *ctx);
++ void (*detach)(struct uci_context *ctx);
++};
++
++struct uci_plugin
++{
++ struct uci_element e;
++ const struct uci_plugin_ops *ops;
++ void *dlh;
++};
++
+
+ /* linked list handling */
+ #ifndef offsetof
+@@ -490,6 +559,8 @@ struct uci_ptr
+ #define uci_type_package UCI_TYPE_PACKAGE
+ #define uci_type_section UCI_TYPE_SECTION
+ #define uci_type_option UCI_TYPE_OPTION
++#define uci_type_hook UCI_TYPE_HOOK
++#define uci_type_plugin UCI_TYPE_PLUGIN
+
+ /* element typecasting */
+ #ifdef UCI_DEBUG_TYPECAST
+@@ -499,6 +570,8 @@ static const char *uci_typestr[] = {
+ [uci_type_package] = "package",
+ [uci_type_section] = "section",
+ [uci_type_option] = "option",
++ [uci_type_hook] = "hook",
++ [uci_type_plugin] = "plugin",
+ };
+
+ static void uci_typecast_error(int from, int to)
+@@ -520,6 +593,8 @@ BUILD_CAST(history)
+ BUILD_CAST(package)
+ BUILD_CAST(section)
+ BUILD_CAST(option)
++BUILD_CAST(hook)
++BUILD_CAST(plugin)
+
+ #else
+ #define uci_to_backend(ptr) container_of(ptr, struct uci_backend, e)
+@@ -527,6 +602,8 @@ BUILD_CAST(option)
+ #define uci_to_package(ptr) container_of(ptr, struct uci_package, e)
+ #define uci_to_section(ptr) container_of(ptr, struct uci_section, e)
+ #define uci_to_option(ptr) container_of(ptr, struct uci_option, e)
++#define uci_to_hook(ptr) container_of(ptr, struct uci_hook, e)
++#define uci_to_plugin(ptr) container_of(ptr, struct uci_plugin, e)
+ #endif
+
+ /**
+--- a/lua/uci.c
++++ b/lua/uci.c
+@@ -765,6 +765,20 @@ uci_lua_add_history(lua_State *L)
+ }
+
+ static int
++uci_lua_load_plugins(lua_State *L)
++{
++ struct uci_context *ctx;
++ int ret, offset = 0;
++ const char *str = NULL;
++
++ ctx = find_context(L, &offset);
++ if (lua_isstring(L, -1))
++ str = lua_tostring(L, -1);
++ ret = uci_load_plugins(ctx, str);
++ return uci_push_status(L, ctx, false);
++}
++
++static int
+ uci_lua_set_savedir(lua_State *L)
+ {
+ struct uci_context *ctx;
+@@ -831,6 +845,7 @@ static const luaL_Reg uci[] = {
+ { "changes", uci_lua_changes },
+ { "foreach", uci_lua_foreach },
+ { "add_history", uci_lua_add_history },
++ { "load_plugins", uci_lua_load_plugins },
+ { "get_confdir", uci_lua_get_confdir },
+ { "set_confdir", uci_lua_set_confdir },
+ { "get_savedir", uci_lua_get_savedir },
projects / openwrt.git / blobdiff