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

lib/include/srslte/common/config_file.h

@@ -35,22 +35,32 @@ 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);
-    if ((homedir = getenv("HOME")) == NULL) {
-      homedir = getpwuid(getuid())->pw_dir;
-    }
-    if (!homedir) {
-      homedir = ".";
-    }
-    snprintf(full_path, sizeof(full_path), "%s/.srs/%s", homedir, default_name.c_str());
+    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()) {
-      return false;
+      // try home folder
+      const char* homedir = NULL;
+      ZERO_OBJECT(full_path);
+      if ((homedir = getenv("HOME")) == NULL) {
+        homedir = getpwuid(getuid())->pw_dir;
+      }
+      if (!homedir) {
+        homedir = ".";
+      }
+      snprintf(full_path, sizeof(full_path), "%s/.srs/%s", homedir, default_name.c_str());
+      filename = std::string(full_path);
+
+      // try to open again
+      conf.open(filename.c_str());
+      if (conf.fail()) {
+        return false;
+      }
     }
   }
   return true;