add test for statfs

src/webfuse/provider.cpp

@@ -4,6 +4,7 @@
 #include <unistd.h>
 #include <sys/stat.h>
 
+#include <cstring>
 #include <iostream>
 
 namespace webfuse
@@ -118,6 +119,9 @@ public:
             case request_type::rmdir:
                 fs_rmdir(reader, writer);
                 break;
+            case request_type::statfs:
+                fs_statfs(reader, writer);
+                break;
             default:
                 std::cout << "unknown request: " << ((int) req_type) << std::endl;
                 break;
@@ -353,6 +357,20 @@ private:
         }
     }
 
+    void fs_statfs(messagereader & reader, messagewriter & writer)
+    {
+        auto const path = reader.read_str();
+        struct statvfs statistics;
+        memset(reinterpret_cast<void*>(&statistics), 0, sizeof(statistics));
+
+        auto const result = fs_.statfs(path, &statistics);
+        writer.write_i32(result);
+        if (0 == result)
+        {
+            writer.write_statistics(&statistics);
+        }
+    }
+
     filesystem_i & fs_;
     ws_client client;
 };

src/webfuse/ws/messagewriter.cpp

@@ -190,6 +190,17 @@ void messagewriter::write_time(timespec const & value)
     write_u32(static_cast<uint32_t>(value.tv_nsec));
 }
 
+void messagewriter::write_statistics(struct statvfs const * statistics)
+{
+    write_u64(statistics->f_bsize);
+    write_u64(statistics->f_frsize);
+    write_u64(statistics->f_blocks);
+    write_u64(statistics->f_bfree);
+    write_u64(statistics->f_bavail);
+    write_u64(statistics->f_files);
+    write_u64(statistics->f_ffree);
+    write_u64(statistics->f_namemax);
+}
 
 unsigned char * messagewriter::get_data(size_t &size)
 {

src/webfuse/ws/messagewriter.hpp

@@ -5,6 +5,7 @@
 #include "webfuse/response_type.hpp"
 
 #include <sys/stat.h>
+#include <sys/statvfs.h>
 
 #include <cinttypes>
 #include <string>
@@ -45,6 +46,7 @@ public:
     void write_gid(gid_t value);
     void write_openflags(int value);
     void write_time(timespec const & value);
+    void write_statistics(struct statvfs const * statistics);
 
     unsigned char * get_data(size_t &size);