mirror of
git://git.openwrt.org/openwrt/openwrt.git
synced 2024-12-11 17:34:57 +00:00
424 lines
10 KiB
Diff
424 lines
10 KiB
Diff
--- a/Makefile
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+++ b/Makefile
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@@ -7,7 +7,7 @@ DEBUG_TYPECAST=0
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include Makefile.inc
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-LIBS=-lc
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+LIBS=-lc -ldl
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SHLIB_FILE=libuci.$(SHLIB_EXT).$(VERSION)
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define add_feature
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@@ -23,6 +23,7 @@ ucimap.o: ucimap.c uci.h uci_config.h uc
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uci_config.h: FORCE
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@rm -f "$@.tmp"
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+ @echo "#define UCI_PREFIX \"$(prefix)\"" > "$@.tmp"
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$(call add_feature,PLUGIN_SUPPORT)
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$(call add_feature,DEBUG)
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$(call add_feature,DEBUG_TYPECAST)
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@@ -33,10 +34,10 @@ uci_config.h: FORCE
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fi
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uci: cli.o libuci.$(SHLIB_EXT)
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- $(CC) -o $@ $< -L. -luci
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+ $(CC) -o $@ $< -L. -luci $(LIBS)
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uci-static: cli.o libuci.a
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- $(CC) $(CFLAGS) -o $@ $^
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+ $(CC) $(CFLAGS) -o $@ $^ $(LIBS)
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libuci-static.o: libuci.c $(LIBUCI_DEPS)
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$(CC) $(CFLAGS) -c -o $@ $<
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--- a/cli.c
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+++ b/cli.c
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@@ -27,6 +27,7 @@ static enum {
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CLI_FLAG_NOCOMMIT = (1 << 2),
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CLI_FLAG_BATCH = (1 << 3),
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CLI_FLAG_SHOW_EXT = (1 << 4),
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+ CLI_FLAG_NOPLUGINS= (1 << 5),
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} flags;
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static FILE *input;
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@@ -136,6 +137,7 @@ static void uci_usage(void)
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"\t-c <path> set the search path for config files (default: /etc/config)\n"
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"\t-d <str> set the delimiter for list values in uci show\n"
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"\t-f <file> use <file> as input instead of stdin\n"
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+ "\t-L do not load any plugins\n"
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"\t-m when importing, merge data into an existing package\n"
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"\t-n name unnamed sections on export (default)\n"
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"\t-N don't name unnamed sections\n"
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@@ -603,7 +605,7 @@ int main(int argc, char **argv)
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return 1;
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}
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- while((c = getopt(argc, argv, "c:d:f:mnNp:P:sSqX")) != -1) {
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+ while((c = getopt(argc, argv, "c:d:f:LmnNp:P:sSqX")) != -1) {
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switch(c) {
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case 'c':
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uci_set_confdir(ctx, optarg);
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@@ -618,6 +620,9 @@ int main(int argc, char **argv)
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return 1;
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}
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break;
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+ case 'L':
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+ flags |= CLI_FLAG_NOPLUGINS;
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+ break;
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case 'm':
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flags |= CLI_FLAG_MERGE;
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break;
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@@ -662,6 +667,10 @@ int main(int argc, char **argv)
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uci_usage();
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return 0;
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}
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+
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+ if (!(flags & CLI_FLAG_NOPLUGINS))
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+ uci_load_plugins(ctx, NULL);
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+
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ret = uci_cmd(argc - 1, argv + 1);
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if (input != stdin)
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fclose(input);
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--- a/history.c
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+++ b/history.c
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@@ -406,6 +406,17 @@ int uci_save(struct uci_context *ctx, st
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if ((asprintf(&filename, "%s/%s", ctx->savedir, p->e.name) < 0) || !filename)
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UCI_THROW(ctx, UCI_ERR_MEM);
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+ uci_foreach_element(&ctx->hooks, tmp) {
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+ struct uci_hook *hook = uci_to_hook(tmp);
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+
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+ if (!hook->ops->set)
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+ continue;
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+
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+ uci_foreach_element(&p->history, e) {
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+ hook->ops->set(hook->ops, p, uci_to_history(e));
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+ }
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+ }
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+
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ctx->err = 0;
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UCI_TRAP_SAVE(ctx, done);
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f = uci_open_stream(ctx, filename, SEEK_END, true, true);
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--- a/libuci.c
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+++ b/libuci.c
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@@ -22,6 +22,8 @@
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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+#include <dlfcn.h>
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+#include <glob.h>
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#include "uci.h"
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static const char *uci_confdir = UCI_CONFDIR;
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@@ -39,6 +41,7 @@ static const char *uci_errstr[] = {
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};
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static void uci_cleanup(struct uci_context *ctx);
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+static void uci_unload_plugin(struct uci_context *ctx, struct uci_plugin *p);
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#include "uci_internal.h"
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#include "util.c"
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@@ -56,6 +59,8 @@ struct uci_context *uci_alloc_context(vo
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uci_list_init(&ctx->root);
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uci_list_init(&ctx->history_path);
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uci_list_init(&ctx->backends);
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+ uci_list_init(&ctx->hooks);
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+ uci_list_init(&ctx->plugins);
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ctx->flags = UCI_FLAG_STRICT | UCI_FLAG_SAVED_HISTORY;
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ctx->confdir = (char *) uci_confdir;
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@@ -86,6 +91,9 @@ void uci_free_context(struct uci_context
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uci_free_element(e);
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}
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UCI_TRAP_RESTORE(ctx);
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+ uci_foreach_element_safe(&ctx->root, tmp, e) {
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+ uci_unload_plugin(ctx, uci_to_plugin(e));
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+ }
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free(ctx);
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ignore:
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@@ -209,9 +217,16 @@ int uci_commit(struct uci_context *ctx,
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int uci_load(struct uci_context *ctx, const char *name, struct uci_package **package)
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{
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struct uci_package *p;
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+ struct uci_element *e;
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+
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UCI_HANDLE_ERR(ctx);
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UCI_ASSERT(ctx, ctx->backend && ctx->backend->load);
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p = ctx->backend->load(ctx, name);
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+ uci_foreach_element(&ctx->hooks, e) {
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+ struct uci_hook *h = uci_to_hook(e);
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+ if (h->ops->load)
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+ h->ops->load(h->ops, p);
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+ }
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if (package)
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*package = p;
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@@ -280,3 +295,94 @@ int uci_set_backend(struct uci_context *
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ctx->backend = uci_to_backend(e);
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return 0;
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}
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+
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+int uci_add_hook(struct uci_context *ctx, const struct uci_hook_ops *ops)
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+{
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+ struct uci_element *e;
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+ struct uci_hook *h;
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+
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+ UCI_HANDLE_ERR(ctx);
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+
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+ /* check for duplicate elements */
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+ uci_foreach_element(&ctx->hooks, e) {
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+ h = uci_to_hook(e);
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+ if (h->ops == ops)
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+ return UCI_ERR_INVAL;
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+ }
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+
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+ h = uci_alloc_element(ctx, hook, "", 0);
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+ h->ops = ops;
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+ uci_list_init(&h->e.list);
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+ uci_list_add(&ctx->hooks, &h->e.list);
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+
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+ return 0;
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+}
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+
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+int uci_remove_hook(struct uci_context *ctx, const struct uci_hook_ops *ops)
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+{
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+ struct uci_element *e;
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+
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+ uci_foreach_element(&ctx->hooks, e) {
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+ struct uci_hook *h = uci_to_hook(e);
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+ if (h->ops == ops) {
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+ uci_list_del(&e->list);
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+ return 0;
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+ }
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+ }
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+ return UCI_ERR_NOTFOUND;
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+}
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+
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+int uci_load_plugin(struct uci_context *ctx, const char *filename)
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+{
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+ struct uci_plugin *p;
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+ const struct uci_plugin_ops *ops;
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+ void *dlh;
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+
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+ UCI_HANDLE_ERR(ctx);
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+ dlh = dlopen(filename, RTLD_GLOBAL|RTLD_NOW);
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+ if (!dlh)
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+ UCI_THROW(ctx, UCI_ERR_NOTFOUND);
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+
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+ ops = dlsym(dlh, "uci_plugin");
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+ if (!ops || !ops->attach || (ops->attach(ctx) != 0)) {
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+ if (!ops)
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+ fprintf(stderr, "No ops\n");
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+ else if (!ops->attach)
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+ fprintf(stderr, "No attach\n");
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+ else
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+ fprintf(stderr, "Other weirdness\n");
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+ dlclose(dlh);
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+ UCI_THROW(ctx, UCI_ERR_INVAL);
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+ }
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+
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+ p = uci_alloc_element(ctx, plugin, filename, 0);
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+ p->dlh = dlh;
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+ p->ops = ops;
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+ uci_list_add(&ctx->plugins, &p->e.list);
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+
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+ return 0;
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+}
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+
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+static void uci_unload_plugin(struct uci_context *ctx, struct uci_plugin *p)
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+{
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+ if (p->ops->detach)
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+ p->ops->detach(ctx);
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+ dlclose(p->dlh);
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+ uci_free_element(&p->e);
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+}
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+
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+int uci_load_plugins(struct uci_context *ctx, const char *pattern)
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+{
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+ glob_t gl;
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+ int i;
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+
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+ if (!pattern)
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+ pattern = UCI_PREFIX "/lib/uci_*.so";
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+
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+ memset(&gl, 0, sizeof(gl));
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+ glob(pattern, 0, NULL, &gl);
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+ for (i = 0; i < gl.gl_pathc; i++)
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+ uci_load_plugin(ctx, gl.gl_pathv[i]);
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+
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+ return 0;
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+}
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--- a/uci.h
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+++ b/uci.h
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@@ -56,6 +56,8 @@ struct uci_list
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};
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struct uci_ptr;
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+struct uci_plugin;
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+struct uci_hook_ops;
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struct uci_element;
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struct uci_package;
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struct uci_section;
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@@ -275,6 +277,43 @@ extern int uci_set_backend(struct uci_co
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*/
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extern bool uci_validate_text(const char *str);
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+
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+/**
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+ * uci_add_hook: add a uci hook
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+ * @ctx: uci context
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+ * @ops: uci hook ops
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+ *
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+ * NB: allocated and freed by the caller
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+ */
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+extern int uci_add_hook(struct uci_context *ctx, const struct uci_hook_ops *ops);
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+
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+/**
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+ * uci_remove_hook: remove a uci hook
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+ * @ctx: uci context
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+ * @ops: uci hook ops
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+ */
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+extern int uci_remove_hook(struct uci_context *ctx, const struct uci_hook_ops *ops);
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+
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+/**
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+ * uci_load_plugin: load an uci plugin
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+ * @ctx: uci context
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+ * @filename: path to the uci plugin
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+ *
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+ * NB: plugin will be unloaded automatically when the context is freed
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+ */
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+int uci_load_plugin(struct uci_context *ctx, const char *filename);
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+
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+/**
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+ * uci_load_plugins: load all uci plugins from a directory
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+ * @ctx: uci context
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+ * @pattern: pattern of uci plugin files (optional)
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+ *
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+ * if pattern is NULL, then uci_load_plugins will call uci_load_plugin
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+ * for uci_*.so in <prefix>/lib/
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+ */
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+int uci_load_plugins(struct uci_context *ctx, const char *pattern);
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+
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+
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/* UCI data structures */
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enum uci_type {
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UCI_TYPE_UNSPEC = 0,
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@@ -285,6 +324,8 @@ enum uci_type {
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UCI_TYPE_PATH = 5,
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UCI_TYPE_BACKEND = 6,
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UCI_TYPE_ITEM = 7,
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+ UCI_TYPE_HOOK = 8,
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+ UCI_TYPE_PLUGIN = 9,
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};
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enum uci_option_type {
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@@ -346,6 +387,9 @@ struct uci_context
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bool internal, nested;
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char *buf;
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int bufsz;
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+
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+ struct uci_list hooks;
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+ struct uci_list plugins;
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};
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struct uci_package
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@@ -420,6 +464,31 @@ struct uci_ptr
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const char *value;
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};
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+struct uci_hook_ops
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+{
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+ void (*load)(const struct uci_hook_ops *ops, struct uci_package *p);
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+ void (*set)(const struct uci_hook_ops *ops, struct uci_package *p, struct uci_history *e);
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+};
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+
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+struct uci_hook
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+{
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+ struct uci_element e;
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+ const struct uci_hook_ops *ops;
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+};
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+
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+struct uci_plugin_ops
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+{
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+ int (*attach)(struct uci_context *ctx);
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+ void (*detach)(struct uci_context *ctx);
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+};
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+
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+struct uci_plugin
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+{
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+ struct uci_element e;
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+ const struct uci_plugin_ops *ops;
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+ void *dlh;
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+};
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+
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/* linked list handling */
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#ifndef offsetof
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@@ -490,6 +559,8 @@ struct uci_ptr
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#define uci_type_package UCI_TYPE_PACKAGE
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#define uci_type_section UCI_TYPE_SECTION
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#define uci_type_option UCI_TYPE_OPTION
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+#define uci_type_hook UCI_TYPE_HOOK
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+#define uci_type_plugin UCI_TYPE_PLUGIN
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/* element typecasting */
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#ifdef UCI_DEBUG_TYPECAST
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@@ -499,6 +570,8 @@ static const char *uci_typestr[] = {
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[uci_type_package] = "package",
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[uci_type_section] = "section",
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[uci_type_option] = "option",
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+ [uci_type_hook] = "hook",
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+ [uci_type_plugin] = "plugin",
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};
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static void uci_typecast_error(int from, int to)
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@@ -520,6 +593,8 @@ BUILD_CAST(history)
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BUILD_CAST(package)
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BUILD_CAST(section)
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BUILD_CAST(option)
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+BUILD_CAST(hook)
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+BUILD_CAST(plugin)
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#else
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#define uci_to_backend(ptr) container_of(ptr, struct uci_backend, e)
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@@ -527,6 +602,8 @@ BUILD_CAST(option)
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#define uci_to_package(ptr) container_of(ptr, struct uci_package, e)
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#define uci_to_section(ptr) container_of(ptr, struct uci_section, e)
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#define uci_to_option(ptr) container_of(ptr, struct uci_option, e)
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+#define uci_to_hook(ptr) container_of(ptr, struct uci_hook, e)
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+#define uci_to_plugin(ptr) container_of(ptr, struct uci_plugin, e)
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#endif
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/**
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--- a/lua/uci.c
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+++ b/lua/uci.c
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@@ -765,6 +765,20 @@ uci_lua_add_history(lua_State *L)
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}
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static int
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+uci_lua_load_plugins(lua_State *L)
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+{
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+ struct uci_context *ctx;
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+ int ret, offset = 0;
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+ const char *str = NULL;
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+
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+ ctx = find_context(L, &offset);
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+ if (lua_isstring(L, -1))
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+ str = lua_tostring(L, -1);
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+ ret = uci_load_plugins(ctx, str);
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+ return uci_push_status(L, ctx, false);
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+}
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+
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+static int
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uci_lua_set_savedir(lua_State *L)
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{
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struct uci_context *ctx;
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@@ -831,6 +845,7 @@ static const luaL_Reg uci[] = {
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{ "changes", uci_lua_changes },
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{ "foreach", uci_lua_foreach },
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{ "add_history", uci_lua_add_history },
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+ { "load_plugins", uci_lua_load_plugins },
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{ "get_confdir", uci_lua_get_confdir },
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{ "set_confdir", uci_lua_set_confdir },
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{ "get_savedir", uci_lua_get_savedir },
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