indexing: create lock / pid file

src/common/rclconfig.cpp

@@ -850,6 +850,10 @@ string RclConfig::getStopfile()
 {
     return path_cat(getConfDir(), "stoplist.txt");
 }
+string RclConfig::getPidfile()
+{
+    return path_cat(getConfDir(), "index.pid");
+}
 
 list<string>& RclConfig::getSkippedNames()
 {

src/common/rclconfig.h

@@ -135,6 +135,8 @@ class RclConfig {
     string getDbDir();
     /** Get stoplist file name */
     string getStopfile();
+    /** Get indexing pid file */
+    string getPidfile();
 
     /** Get list of skipped file names for current keydir */
     list<string>& getSkippedNames();