initial code commit

src/ioctl.cpp

@@ -0,0 +1,89 @@
+/*
+   The MIT License (MIT)
+
+   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+
+   Permission is hereby granted, free of charge, to any person obtaining a copy
+   of this software and associated documentation files (the "Software"), to deal
+   in the Software without restriction, including without limitation the rights
+   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+   copies of the Software, and to permit persons to whom the Software is
+   furnished to do so, subject to the following conditions:
+
+   The above copyright notice and this permission notice shall be included in
+   all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+   THE SOFTWARE.
+*/
+
+#include <fuse.h>
+
+#include <string>
+
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <linux/fs.h>
+
+#include "config.hpp"
+#include "fileinfo.hpp"
+#include "ugid.hpp"
+
+static
+int
+_ioctl(const int           fd,
+       const int           cmd,
+       void               *arg,
+       const unsigned int  flags,
+       void               *data)
+{
+  int rv;
+
+  switch(cmd)
+    {
+    case FS_IOC_GETFLAGS:
+    case FS_IOC_SETFLAGS:
+      rv = ::ioctl(fd,cmd,data);
+      break;
+
+    default:
+      rv = -1;
+      errno = ENOTTY;
+      break;
+    }
+
+  return ((rv == -1) ? -errno : rv);
+}
+
+namespace mergerfs
+{
+  namespace ioctl
+  {
+    int
+    ioctl(const char            *fusepath,
+          int                    cmd,
+          void                  *arg,
+          struct fuse_file_info *fi,
+          unsigned int           flags,
+          void                  *data)
+    {
+      const ugid::SetResetGuard  ugid;
+      const config::Config      &config   = config::get();
+      const FileInfo            *fileinfo = (FileInfo*)fi->fh;
+
+      if(fusepath == config.controlfile)
+        return -EINVAL;
+
+      return _ioctl(fileinfo->fd,
+                    cmd,
+                    arg,
+                    flags,
+                    data);
+    }
+  }
+}