Merge pull request #67 from trapexit/priority

attempt to set priority to -10 on startup. closes #65

src/mergerfs.cpp

@@ -152,10 +152,13 @@ namespace local
   void
   setup_resources(void)
   {
+    const int prio = -10;
+
     std::srand(time(NULL));
     mergerfs::resources::reset_umask();
     mergerfs::resources::maxout_rlimit_nofile();
     mergerfs::resources::maxout_rlimit_fsize();
+    mergerfs::resources::setpriority(prio);
   }
 }
 

src/resources.cpp

@@ -40,7 +40,7 @@ namespace mergerfs
     }
 
     int
-    maxout_rlimit(int resource)
+    maxout_rlimit(const int resource)
     {
       int rv;
       struct rlimit rlim;
@@ -78,5 +78,13 @@ namespace mergerfs
     {
       return maxout_rlimit(RLIMIT_FSIZE);
     }
+
+    int
+    setpriority(const int prio)
+    {
+      const int SELF = 0;
+
+      return ::setpriority(PRIO_PROCESS,SELF,prio);
+    }
   }
 }

src/resources.hpp

@@ -27,8 +27,9 @@ namespace mergerfs
   namespace resources
   {
     int reset_umask(void);
-    int maxout_rlimit(int resource);
+    int maxout_rlimit(const int resource);
     int maxout_rlimit_nofile(void);
     int maxout_rlimit_fsize(void);
+    int setpriority(const int prio);
   }
 }