Add function to get config default search path

Add a function to get default search path for controller json
configuration files.

BUG-AGL: SPEC-3011

Change-Id: Ib19824349eb599332c86c8e0647fe60cb5fb0144
Signed-off-by: Jonathan Aillet <jonathan.aillet@iot.bzh>

2 files changed, 41 insertions, 0 deletions

diff --git a/ctl-lib/ctl-config.c b/ctl-lib/ctl-config.c
index 9039ac5..e6a16b9 100644
--- a/ctl-lib/ctl-config.c
+++ b/ctl-lib/ctl-config.c
@@ -346,3 +346,42 @@ int CtlLoadSections(afb_api_t apiHandle, CtlConfigT *ctlHandle, CtlSectionT *sec
 
     return 0;
 }
+
+char *GetDefaultConfigSearchPath(afb_api_t apiHandle)
+{
+    size_t searchPathLength;
+    char *searchPath, *binderRootDirPath, *bindingParentDirPath;
+
+    if(! apiHandle)
+        return NULL;
+
+    binderRootDirPath = GetAFBRootDirPath(apiHandle);
+    if(! binderRootDirPath)
+        return NULL;
+
+    bindingParentDirPath = GetBindingParentDirPath(apiHandle);
+    if(! bindingParentDirPath) {
+        free(binderRootDirPath);
+        return NULL;
+    }
+
+    /* Allocating with the size of binding root dir path + binding parent directory path
+     * + 1 character for the NULL terminating character + 1 character for the additional separator
+     * between binderRootDirPath and bindingParentDirPath + 2*4 char for '/etc suffixes'.
+     */
+    searchPathLength = strlen(binderRootDirPath) + strlen(bindingParentDirPath) + 10;
+
+    searchPath = malloc(searchPathLength);
+    if(! searchPath) {
+        free(binderRootDirPath);
+        free(bindingParentDirPath);
+        return NULL;
+    }
+
+    snprintf(searchPath, searchPathLength, "%s/etc:%s/etc", binderRootDirPath, bindingParentDirPath);
+
+    free(binderRootDirPath);
+    free(bindingParentDirPath);
+
+    return searchPath;
+}
diff --git a/ctl-lib/ctl-config.h b/ctl-lib/ctl-config.h
index dc98bb2..53a75f4 100644
--- a/ctl-lib/ctl-config.h
+++ b/ctl-lib/ctl-config.h
@@ -111,6 +111,7 @@ extern int CtlConfigExec(afb_api_t apiHandle, CtlConfigT *ctlConfig) ;
 extern CtlConfigT *CtlLoadMetaDataJson(afb_api_t apiHandle,json_object *ctlConfigJ, const char *prefix) ;
 extern CtlConfigT *CtlLoadMetaDataUsingPrefix(afb_api_t apiHandle,const char* filepath, const char *prefix) ;
 extern int CtlLoadSections(afb_api_t apiHandle, CtlConfigT *ctlHandle, CtlSectionT *sections);
+extern char *GetDefaultConfigSearchPath(afb_api_t apiHandle);
 #define CtlLoadMetaData(api, filepath) CtlLoadMetaDataUsingPrefix(api, filepath, NULL)
 
 // ctl-event.c
@@ -129,6 +130,7 @@ extern int PluginConfig(afb_api_t UNUSED_ARG(apiHandle), CtlSectionT *section, j
 extern int PluginGetCB (afb_api_t apiHandle, CtlActionT *action , json_object *callbackJ);
 extern void* getPluginContext(CtlPluginT *plugin);
 extern void setPluginContext(CtlPluginT *plugin, void *context);
+
 #ifdef __cplusplus
 }
 #endif