183 lines
3.9 KiB
Diff
183 lines
3.9 KiB
Diff
--- /dev/null
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+++ b/trigger/Makefile
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@@ -0,0 +1,44 @@
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+include ../Makefile.inc
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+LUA_VERSION=5.1
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+PREFIX_SEARCH=/usr /usr/local /opt/local
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+LUA_PLUGINDIR=$(firstword \
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+ $(foreach ldir,$(subst ;, ,$(shell lua -e 'print(package.cpath)')), \
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+ $(if $(findstring lib/lua/,$(ldir)),$(patsubst %/?.so,%,$(ldir))) \
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+ ) \
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+)
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+
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+# find lua prefix
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+LUA_PREFIX=$(firstword \
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+ $(foreach prefix,$(PREFIX_SEARCH),\
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+ $(if $(wildcard $(prefix)/include/lua.h),$(prefix)) \
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+ ) \
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+)
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+
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+libdir=$(prefix)/libs
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+luadir=$(if $(LUA_PLUGINDIR),$(LUA_PLUGINDIR),$(libdir)/lua/$(LUA_VERSION))
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+luainc=$(shell pkg-config --silence-errors --cflags lua$(LUA_VERSION))
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+
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+CPPFLAGS=-I.. $(if $(luainc),$(luainc), -I$(LUA_PREFIX)/include)
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+LIBS=-L.. -luci $(shell pkg-config --silence-errors --libs lua$(LUA_VERSION))
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+
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+PLUGIN_LD=$(CC)
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+ifeq ($(OS),Darwin)
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+ PLUGIN_LDFLAGS=-bundle
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+else
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+ PLUGIN_LDFLAGS=-shared -Wl,-soname,$(SHLIB_FILE)
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+endif
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+
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+all: uci_trigger.so
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+
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+uci_trigger.so: uci_trigger.o
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+ $(PLUGIN_LD) $(PLUGIN_LDFLAGS) -o $@ $^ $(LIBS)
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+
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+%.o: %.c
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+ $(CC) $(CPPFLAGS) $(CFLAGS) $(FPIC) -c -o $@ $<
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+
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+install:
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+ mkdir -p $(DESTDIR)$(luadir)
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+ $(INSTALL) -m0644 uci_trigger.so $(DESTDIR)$(luadir)/
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+
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+clean:
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+ rm -f *.so *.o uci_trigger.so
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--- /dev/null
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+++ b/trigger/uci_trigger.c
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@@ -0,0 +1,132 @@
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+#include <sys/types.h>
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+#include <sys/time.h>
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+#include <stdbool.h>
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+#include <string.h>
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+#include <stdio.h>
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+#include <lualib.h>
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+#include <lauxlib.h>
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+#include "uci.h"
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+
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+// #define DEBUG
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+
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+static int refcount = 0;
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+static lua_State *gL = NULL;
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+static bool prepared = false;
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+
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+struct trigger_set_op {
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+ struct uci_package *p;
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+ struct uci_history *h;
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+};
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+
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+static int trigger_set(lua_State *L)
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+{
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+ struct trigger_set_op *so =
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+ (struct trigger_set_op *)lua_touserdata(L, 1);
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+ struct uci_package *p = so->p;
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+ struct uci_history *h = so->h;
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+ struct uci_context *ctx = p->ctx;
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+
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+ /* ignore non-standard savedirs/configdirs
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+ * in order to not trigger events on uci state changes */
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+ if (strcmp(ctx->savedir, UCI_SAVEDIR) ||
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+ strcmp(ctx->confdir, UCI_CONFDIR))
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+ return 0;
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+
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+ if (!prepared) {
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+ lua_getglobal(L, "require");
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+ lua_pushstring(L, "uci.trigger");
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+ lua_call(L, 1, 0);
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+
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+ lua_getglobal(L, "uci");
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+ lua_getfield(L, -1, "trigger");
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+ lua_getfield(L, -1, "load_modules");
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+ lua_call(L, 0, 0);
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+ prepared = true;
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+ } else {
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+ lua_getglobal(L, "uci");
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+ lua_getfield(L, -1, "trigger");
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+ }
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+
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+ lua_getfield(L, -1, "set");
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+ lua_createtable(L, 4, 0);
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+
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+ lua_pushstring(L, p->e.name);
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+ lua_rawseti(L, -2, 1);
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+ if (h->section) {
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+ lua_pushstring(L, h->section);
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+ lua_rawseti(L, -2, 2);
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+ }
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+ if (h->e.name) {
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+ lua_pushstring(L, h->e.name);
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+ lua_rawseti(L, -2, 3);
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+ }
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+ if (h->value) {
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+ lua_pushstring(L, h->value);
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+ lua_rawseti(L, -2, 4);
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+ }
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+ lua_call(L, 1, 0);
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+ lua_pop(L, 2);
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+ return 0;
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+}
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+
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+#ifdef DEBUG
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+
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+static int report (lua_State *L, int status) {
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+ if (status && !lua_isnil(L, -1)) {
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+ const char *msg = lua_tostring(L, -1);
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+ if (msg == NULL) msg = "(error object is not a string)";
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+ fprintf(stderr, "ERROR: %s\n", msg);
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+ lua_pop(L, 1);
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+ }
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+ return status;
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+}
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+
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+#else
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+
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+static inline int report(lua_State *L, int status) {
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+ return status;
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+}
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+
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+#endif
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+
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+static void trigger_set_hook(const struct uci_hook_ops *ops, struct uci_package *p, struct uci_history *h)
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+{
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+ struct trigger_set_op so;
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+
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+ so.p = p;
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+ so.h = h;
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+ report(gL, lua_cpcall(gL, &trigger_set, &so));
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+}
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+
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+static struct uci_hook_ops hook = {
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+ .set = trigger_set_hook,
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+};
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+
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+static int trigger_attach(struct uci_context *ctx)
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+{
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+ if (!gL) {
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+ gL = luaL_newstate();
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+ if (!gL)
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+ return -1;
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+ luaL_openlibs(gL);
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+
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+ refcount++;
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+ }
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+ uci_add_hook(ctx, &hook);
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+ return 0;
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+}
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+
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+static void trigger_detach(struct uci_context *ctx)
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+{
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+ if (gL && (--refcount <= 0)) {
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+ lua_close(gL);
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+ gL = NULL;
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+ refcount = 0;
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+ prepared = false;
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+ }
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+}
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+
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+struct uci_plugin_ops uci_plugin = {
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+ .attach = trigger_attach,
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+ .detach = trigger_detach,
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+};
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