Link in FUSE

Start linking FUSE and jumping into FUSE on boot.  Also define a couple
of trivial operations, but don’t actually do filename encoding yet.

7 files changed, 239 insertions, 102 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 785bad0..a664713 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,5 +28,6 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ftrapv")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fstack-protector-strong --param=ssp-buffer-size=4")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Weverything -Wno-c++98-compat")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-weak-vtables")
 
 add_subdirectory(src)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 751bd39..5f1b286 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -32,6 +32,8 @@ set(
 
 add_executable(
   scoville
+  encoding.cc
+  operations.cc
   scoville.cc
 )
 target_include_directories(
diff --git a/src/encoding.cc b/src/encoding.cc
new file mode 100644
index 0000000..93773a6
--- /dev/null
+++ b/src/encoding.cc
@@ -0,0 +1,84 @@
+// Copyright 2016 Benjamin Barenblat
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License.  You may obtain a copy
+// of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+// License for the specific language governing permissions and limitations under
+// the License.
+
+#include "encoding.h"
+
+#include <array>
+#include <cstdlib>
+#include <sstream>
+#include <string>
+
+namespace scoville {
+
+namespace {
+
+void WriteAsciiAsHex(const char c, std::ostringstream* const out) {
+  if (1 < sizeof(c) && 0x100 <= c) {
+    // Not ASCII!
+    throw EncodingFailure("could not encode non-ASCII character '" +
+                          std::string(1, c) + "'");
+  }
+  *out << std::hex << static_cast<int>(c);
+}
+
+char ReadHexAsAscii(std::istringstream* const in) {
+  std::array<char, 3> hex_str;
+  in->get(hex_str.data(), hex_str.size());
+  char* decoded_end;
+  const char result =
+      static_cast<char>(std::strtol(hex_str.data(), &decoded_end, 16));
+  if (decoded_end == hex_str.data()) {
+    throw DecodingFailure("could not decode invalid hex");
+  }
+  return result;
+}
+
+bool IsVfatBadCharacter(const char c) noexcept {
+  return (0 <= c && c < 0x20) || c == '*' || c == '?' || c == '<' || c == '>' ||
+         c == '|' || c == '"' || c == ':' || c == '/' || c == '\\';
+}
+
+}  // namespace
+
+void Encode(std::istringstream* const in, std::ostringstream* const out) {
+  char c;
+  while (!in->get(c).eof()) {
+    if (IsVfatBadCharacter(c)) {
+      *out << '%';
+      WriteAsciiAsHex(c, out);
+    } else if (c == '%') {
+      *out << "%%";
+    } else {
+      *out << c;
+    }
+  }
+}
+
+void Decode(std::istringstream* const in, std::ostringstream* const out) {
+  char c;
+  while (!in->get(c).eof()) {
+    if (c == '%') {
+      if (in->peek() == '%') {
+        in->ignore();
+        *out << "%";
+      } else {
+        *out << ReadHexAsAscii(in);
+      }
+    } else {
+      *out << c;
+    }
+  }
+}
+
+}  // scoville
diff --git a/src/encoding.h b/src/encoding.h
new file mode 100644
index 0000000..717d421
--- /dev/null
+++ b/src/encoding.h
@@ -0,0 +1,39 @@
+// Copyright 2016 Benjamin Barenblat
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License.  You may obtain a copy
+// of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+// License for the specific language governing permissions and limitations under
+// the License.
+
+#ifndef ENCODING_H_
+#define ENCODING_H_
+
+#include <sstream>
+#include <stdexcept>
+
+namespace scoville {
+
+class EncodingFailure : public std::logic_error {
+ public:
+  using std::logic_error::logic_error;
+};
+
+class DecodingFailure : public std::logic_error {
+ public:
+  using std::logic_error::logic_error;
+};
+
+void Encode(std::istringstream*, std::ostringstream*);
+
+void Decode(std::istringstream*, std::ostringstream*);
+
+}  // scoville
+
+#endif  // ENCODING_H_
diff --git a/src/operations.cc b/src/operations.cc
new file mode 100644
index 0000000..a26b868
--- /dev/null
+++ b/src/operations.cc
@@ -0,0 +1,63 @@
+// Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+// Copyright (C) 2011  Sebastian Pipping <sebastian@pipping.org>
+// Copyright (C) 2016  Benjamin Barenblat <benjamin@barenblat.name>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+// FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+// details.
+//
+// You should have received a copy of the GNU General Public License along with
+// this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "operations.h"
+
+#include <cerrno>
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wc++98-compat-pedantic"
+#pragma clang diagnostic ignored "-Wdocumentation"
+#pragma clang diagnostic ignored "-Wpadded"
+#pragma clang diagnostic ignored "-Wunused-macros"
+#define FUSE_USE_VERSION 26
+#include <fuse.h>
+#pragma clang diagnostic pop
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+namespace scoville {
+
+namespace {
+
+int GetAttr(const char* const path, struct stat* output) {
+  if (lstat(path, output) == -1) {
+    return -errno;
+  }
+  return 0;
+}
+
+int ReadLink(const char* const path, char *const output, const size_t output_size) {
+  const ssize_t bytes_written = readlink(path, output, output_size);
+  if (bytes_written == -1) {
+    return -errno;
+  }
+  output[bytes_written] = '\0';
+  return 0;
+}
+
+}  // namespace
+
+fuse_operations FuseOperations() {
+  fuse_operations result;
+  result.getattr = &GetAttr;
+  result.readlink = &ReadLink;
+  return result;
+}
+
+}  // namespace scoville
diff --git a/src/operations.h b/src/operations.h
new file mode 100644
index 0000000..e4672eb
--- /dev/null
+++ b/src/operations.h
@@ -0,0 +1,32 @@
+// Copyright 2016 Benjamin Barenblat
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License.  You may obtain a copy
+// of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+// License for the specific language governing permissions and limitations under
+// the License.
+
+#ifndef OPERATIONS_H_
+#define OPERATIONS_H_
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wc++98-compat-pedantic"
+#pragma clang diagnostic ignored "-Wdocumentation"
+#pragma clang diagnostic ignored "-Wpadded"
+#define FUSE_USE_VERSION 26
+#include <fuse.h>
+#pragma clang diagnostic pop
+
+namespace scoville {
+
+fuse_operations FuseOperations();
+
+}  // namespace scoville
+
+#endif  // OPERATIONS_H_
diff --git a/src/scoville.cc b/src/scoville.cc
index c0d4d79..db39ee8 100644
--- a/src/scoville.cc
+++ b/src/scoville.cc
@@ -1,117 +1,33 @@
-// Copyright 2016 Benjamin Barenblat
+// Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+// Copyright (C) 2011  Sebastian Pipping <sebastian@pipping.org>
+// Copyright (C) 2016  Benjamin Barenblat <benjamin@barenblat.name>
 //
-// Licensed under the Apache License, Version 2.0 (the "License"); you may not
-// use this file except in compliance with the License.  You may obtain a copy
-// of the License at
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
 //
-//     http://www.apache.org/licenses/LICENSE-2.0
+// This program is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+// FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+// details.
 //
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
-// License for the specific language governing permissions and limitations under
-// the License.
-
-#include <array>
-#include <cstdlib>
-#include <sstream>
-#include <stdexcept>
-#include <string>
+// You should have received a copy of the GNU General Public License along with
+// this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include <glog/logging.h>
 
-namespace {
-
-class EncodingFailure : public std::logic_error {
- public:
-  using std::logic_error::logic_error;
-};
-
-class DecodingFailure : public std::logic_error {
- public:
-  using std::logic_error::logic_error;
-};
-
-void WriteAsciiAsHex(const char c, std::ostringstream* const out) {
-  if (1 < sizeof(c) && 0x100 <= c) {
-    // Not ASCII!
-    throw EncodingFailure("could not encode non-ASCII character '" +
-                          std::string(1, c) + "'");
-  }
-  *out << std::hex << static_cast<int>(c);
-}
-
-char ReadHexAsAscii(std::istringstream* const in) {
-  std::array<char, 3> hex_str;
-  in->get(hex_str.data(), hex_str.size());
-  char* decoded_end;
-  const char result =
-      static_cast<char>(std::strtol(hex_str.data(), &decoded_end, 16));
-  if (decoded_end == hex_str.data()) {
-    throw DecodingFailure("could not decode invalid hex");
-  }
-  return result;
-}
-
-bool IsVfatBadCharacter(const char c) noexcept {
-  return (0 <= c && c < 0x20) || c == '*' || c == '?' || c == '<' || c == '>' ||
-         c == '|' || c == '"' || c == ':' || c == '/' || c == '\\';
-}
-
-void Encode(std::istringstream* const in, std::ostringstream* const out) {
-  char c;
-  while (!in->get(c).eof()) {
-    if (IsVfatBadCharacter(c)) {
-      *out << '%';
-      WriteAsciiAsHex(c, out);
-    } else if (c == '%') {
-      *out << "%%";
-    } else {
-      *out << c;
-    }
-  }
-}
+#include "operations.h"
 
-void Decode(std::istringstream* const in, std::ostringstream* const out) {
-  char c;
-  while (!in->get(c).eof()) {
-    if (c == '%') {
-      if (in->peek() == '%') {
-        in->ignore();
-        *out << "%";
-      } else {
-        *out << ReadHexAsAscii(in);
-      }
-    } else {
-      *out << c;
-    }
-  }
-}
+namespace {
 
 }  // namespace
 
-int main(int, char* const argv[]) {
+int main(const int argc, char* argv[]) {
   FLAGS_logtostderr = true;
   google::InstallFailureSignalHandler();
   google::InitGoogleLogging(argv[0]);
 
-  LOG(INFO) << "Got        " << argv[1];
-
-  std::string result;
-  {
-    std::istringstream in(argv[1]);
-    std::ostringstream out;
-    Encode(&in, &out);
-    result = out.str();
-  }
-  LOG(INFO) << "Encoded to " << result;
-
-  {
-    std::istringstream in(result);
-    std::ostringstream out;
-    Decode(&in, &out);
-    result = out.str();
-  }
-  LOG(INFO) << "Decoded to " << result;
-  return 0;
+  const fuse_operations operations = scoville::FuseOperations();
+  return fuse_main(argc, argv, &operations, nullptr);
 }