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authorHyungKyu Song <hk76.song@samsung.com>2013-02-16 00:11:35 +0900
committerHyungKyu Song <hk76.song@samsung.com>2013-02-16 00:11:35 +0900
commitb32dea69029f492083f2b11f3a087300ddb2b9e0 (patch)
treecc97cc634e3234446670bc6c7d455bd1be5dd806 /src/module.c
parentc3875cbe2f8e945b837a76ac5f8e6d57bde940bb (diff)
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Diffstat (limited to 'src/module.c')
-rw-r--r--src/module.c138
1 files changed, 138 insertions, 0 deletions
diff --git a/src/module.c b/src/module.c
new file mode 100644
index 0000000..da518d3
--- /dev/null
+++ b/src/module.c
@@ -0,0 +1,138 @@
+/*
+ * UI Gadget
+ *
+ * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd. All rights reserved.
+ *
+ * Contact: Jayoun Lee <airjany@samsung.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <linux/limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <dlfcn.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+#include <app_manager.h>
+
+#include "ug-module.h"
+#include "ug-dbg.h"
+
+#define UG_MODULE_INIT_SYM "UG_MODULE_INIT"
+#define UG_MODULE_EXIT_SYM "UG_MODULE_EXIT"
+
+static int file_exist(const char *filename)
+{
+ FILE *file;
+ if ((file = fopen(filename, "r"))) {
+ fclose(file);
+ return 1;
+ }
+
+ return 0;
+}
+
+struct ug_module *ug_module_load(const char *name)
+{
+ void *handle;
+ struct ug_module *module;
+ char ug_file[PATH_MAX];
+ char *pkg_name = NULL;
+
+ int (*module_init) (struct ug_module_ops *ops);
+
+ module = calloc(1, sizeof(struct ug_module));
+
+ if (!module) {
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ app_manager_get_package(getpid(), &pkg_name);
+
+ do {
+ if (pkg_name) {
+ snprintf(ug_file, PATH_MAX, "/usr/apps/%s/lib/libug-%s.so", pkg_name, name);
+ if (file_exist(ug_file))
+ break;
+ snprintf(ug_file, PATH_MAX, "/opt/apps/%s/lib/libug-%s.so", pkg_name, name);
+ if (file_exist(ug_file))
+ break;
+ }
+ snprintf(ug_file, PATH_MAX, "/usr/ug/lib/libug-%s.so", name);
+ if (file_exist(ug_file))
+ break;
+ snprintf(ug_file, PATH_MAX, "/opt/usr/ug/lib/libug-%s.so", name);
+ if (file_exist(ug_file))
+ break;
+ } while (0);
+
+ if(pkg_name) {
+ free(pkg_name);
+ pkg_name = NULL;
+ }
+
+ handle = dlopen(ug_file, RTLD_LAZY);
+ if (!handle) {
+ _ERR("dlopen failed: %s", dlerror());
+ goto module_free;
+ }
+
+ module_init = dlsym(handle, UG_MODULE_INIT_SYM);
+ if (!module_init) {
+ _ERR("dlsym failed: %s", dlerror());
+ goto module_dlclose;
+ }
+
+ if (module_init(&module->ops))
+ goto module_dlclose;
+
+ module->handle = handle;
+ return module;
+
+ module_dlclose:
+ dlclose(handle);
+
+ module_free:
+ free(module);
+ return NULL;
+}
+
+int ug_module_unload(struct ug_module *module)
+{
+ void (*module_exit) (struct ug_module_ops *ops);
+
+ if (!module) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (module->handle) {
+ module_exit = dlsym(module->handle, UG_MODULE_EXIT_SYM);
+ if (module_exit)
+ module_exit(&module->ops);
+ else
+ _ERR("dlsym failed: %s", dlerror());
+
+ dlclose(module->handle);
+ module->handle = NULL;
+ }
+
+ free(module);
+ return 0;
+}