add fgetattr. closes #5

README.md

@@ -18,7 +18,7 @@ Filesystem calls are broken up into 4 functional categories: search, action, cre
 | search | access, getattr, getxattr, listxattr, open, readlink  |
 | action | chmod, link, removexattr, rmdir, setxattr, truncate, unlink, utimens |
 | create | create, mkdir, mknod |
-| none   | fallocate, fsync, ftruncate, ioctl, read, readdir, rename, statfs, symlink, write, release |
+| none   | fallocate, fgetattr, fsync, ftruncate, ioctl, read, readdir, rename, statfs, symlink, write, release |
 
 #### Policy descriptions ####
 | Policy | Description |

src/fgetattr.cpp

@@ -0,0 +1,68 @@
+/*
+   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 <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "config.hpp"
+#include "ugid.hpp"
+#include "fileinfo.hpp"
+
+static
+int
+_fgetattr(const int    fd,
+          struct stat &st)
+{
+  int rv;
+
+  rv = ::fstat(fd,&st);
+
+  return ((rv == -1) ? -errno : 0);
+}
+
+namespace mergerfs
+{
+  namespace fgetattr
+  {
+    int
+    fgetattr(const char            *fusepath,
+             struct stat           *st,
+             struct fuse_file_info *ffi)
+    {
+      const ugid::SetResetGuard  ugid;
+      const config::Config      &config   = config::get();
+      const FileInfo            *fileinfo = (FileInfo*)ffi->fh;
+
+      if(fusepath == config.controlfile)
+        return (*st = config.controlfilestat,0);
+
+      return _fgetattr(fileinfo->fd,
+                       *st);
+    }
+  }
+}

src/fgetattr.hpp

@@ -0,0 +1,38 @@
+/*
+   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 <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+namespace mergerfs
+{
+  namespace fgetattr
+  {
+    int
+    fgetattr(const char            *fusepath,
+             struct stat           *st,
+             struct fuse_file_info *fileinfo);
+  }
+}

src/mergerfs.cpp

@@ -39,6 +39,7 @@
 #include "chown.hpp"
 #include "create.hpp"
 #include "fallocate.hpp"
+#include "fgetattr.hpp"
 #include "fsync.hpp"
 #include "ftruncate.hpp"
 #include "getattr.hpp"
@@ -80,7 +81,7 @@ get_fuse_operations()
   ops.create      = mergerfs::create::create;
   ops.destroy     = NULL;
   ops.fallocate   = mergerfs::fallocate::fallocate;
-  ops.fgetattr    = NULL;
+  ops.fgetattr    = mergerfs::fgetattr::fgetattr;
   ops.flock       = NULL;
   ops.flush       = NULL;       /* called on close() of fd */
   ops.fsync       = mergerfs::fsync::fsync;