create minfreespace option. closes #71

src/truncate.cpp

@@ -43,6 +43,7 @@ static
 int
 _truncate(const fs::find::Func  actionFunc,
           const vector<string> &srcmounts,
+          const size_t          minfreespace,
           const string         &fusepath,
           const off_t           size)
 {
@@ -50,7 +51,7 @@ _truncate(const fs::find::Func  actionFunc,
   int error;
   fs::Paths paths;
 
-  rv = actionFunc(srcmounts,fusepath,paths,-1);
+  rv = actionFunc(srcmounts,fusepath,minfreespace,paths);
   if(rv == -1)
     return -errno;
 
@@ -81,6 +82,7 @@ namespace mergerfs
 
       return _truncate(*config.truncate,
                        config.srcmounts,
+                       config.minfreespace,
                        fusepath,
                        size);
     }