initial code commit

src/unlink.cpp

@@ -0,0 +1,85 @@
+/*
+   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 <errno.h>
+#include <unistd.h>
+
+#include <string>
+#include <vector>
+
+#include "ugid.hpp"
+#include "fs.hpp"
+#include "config.hpp"
+#include "assert.hpp"
+
+using std::string;
+using std::vector;
+using mergerfs::Policy;
+
+static
+int
+_unlink(const Policy::Action::Func  searchFunc,
+        const vector<string>       &srcmounts,
+        const string                fusepath)
+{
+  int rv;
+  int error;
+  vector<fs::Path> paths;
+
+  searchFunc(srcmounts,fusepath,paths);
+  if(paths.empty())
+    return -ENOENT;
+
+  rv    = -1;
+  error =  0;
+  for(vector<fs::Path>::const_iterator
+        i = paths.begin(), ei = paths.end(); i != ei; ++i)
+    {
+      rv &= ::unlink(i->full.c_str());
+      if(rv == -1)
+        error = errno;
+    }
+
+  return ((rv == -1) ? -error : 0);
+}
+
+namespace mergerfs
+{
+  namespace unlink
+  {
+    int
+    unlink(const char *fusepath)
+    {
+      const ugid::SetResetGuard  ugid;
+      const config::Config      &config = config::get();
+
+      if(fusepath == config.controlfile)
+        return -EPERM;
+
+      return _unlink(config.policy.action,
+                     config.srcmounts,
+                     fusepath);
+    }
+  }
+}