try to load config files from /etc/srslte before checking users's home

lib/include/srslte/common/config_file.h

@@ -35,9 +35,18 @@ bool config_exists(std::string &filename, std::string default_name)
 {
   std::ifstream conf(filename.c_str(), std::ios::in);
   if(conf.fail()) {
-    const char *homedir = NULL;
+    // try to find file in /etc/srslte
     char full_path[256];
     ZERO_OBJECT(full_path);
+    snprintf(full_path, sizeof(full_path), "/etc/srslte/%s", default_name.c_str());
+    filename = std::string(full_path);
+
+    // try to open again
+    conf.open(filename.c_str());
+    if (conf.fail()) {
+      // try home folder
+      const char* homedir = NULL;
+      ZERO_OBJECT(full_path);
       if ((homedir = getenv("HOME")) == NULL) {
         homedir = getpwuid(getuid())->pw_dir;
       }
@@ -53,6 +62,7 @@ bool config_exists(std::string &filename, std::string default_name)
         return false;
       }
     }
+  }
   return true;
 }