From 6e44f4a32631cab2a9081b10e7f17b22b90d988a Mon Sep 17 00:00:00 2001
From: Sebastian Messmer <heinzisoft@web.de>
Date: Tue, 4 Nov 2014 17:40:31 +0100
Subject: [PATCH] Implemented basic fuse interface

---
 src/cryfs_lib/CMakeLists.txt      |   4 +
 src/cryfs_lib/CryDevice.h         |   4 +
 src/cryfs_lib/fuse/CMakeLists.txt |   3 +
 src/cryfs_lib/fuse/Fuse.cpp       | 198 ++++++++++++++++++++++++++++++
 src/cryfs_lib/fuse/Fuse.h         | 168 +++++++++++++++++++++++++
 src/cryfs_lib/fuse/params.h       |   7 ++
 src/main.cpp                      |  10 +-
 7 files changed, 387 insertions(+), 7 deletions(-)
 create mode 100644 src/cryfs_lib/fuse/CMakeLists.txt
 create mode 100644 src/cryfs_lib/fuse/Fuse.cpp
 create mode 100644 src/cryfs_lib/fuse/Fuse.h
 create mode 100644 src/cryfs_lib/fuse/params.h

diff --git a/src/cryfs_lib/CMakeLists.txt b/src/cryfs_lib/CMakeLists.txt
index 4dc2b452..17500cbd 100644
--- a/src/cryfs_lib/CMakeLists.txt
+++ b/src/cryfs_lib/CMakeLists.txt
@@ -1 +1,5 @@
+add_subdirectory(fuse)
+
 add_library(cryfs_lib CryDevice.cpp)
+
+target_link_libraries(cryfs_lib cryfs_fuse)
diff --git a/src/cryfs_lib/CryDevice.h b/src/cryfs_lib/CryDevice.h
index 27076ce6..22822db8 100644
--- a/src/cryfs_lib/CryDevice.h
+++ b/src/cryfs_lib/CryDevice.h
@@ -1,12 +1,16 @@
 #ifndef CRYFS_LIB_CRYDEVICE_H_
 #define CRYFS_LIB_CRYDEVICE_H_
 
+#include "fuse/Fuse.h"
+
 namespace cryfs {
 
 class CryDevice {
 public:
 	CryDevice();
 	virtual ~CryDevice();
+private:
+	Fuse _fuse;
 };
 
 }
diff --git a/src/cryfs_lib/fuse/CMakeLists.txt b/src/cryfs_lib/fuse/CMakeLists.txt
new file mode 100644
index 00000000..7b2999d2
--- /dev/null
+++ b/src/cryfs_lib/fuse/CMakeLists.txt
@@ -0,0 +1,3 @@
+add_library(cryfs_fuse Fuse.cpp)
+
+target_link_libraries(cryfs_fuse fuse)
diff --git a/src/cryfs_lib/fuse/Fuse.cpp b/src/cryfs_lib/fuse/Fuse.cpp
new file mode 100644
index 00000000..7dd0eb8e
--- /dev/null
+++ b/src/cryfs_lib/fuse/Fuse.cpp
@@ -0,0 +1,198 @@
+#include "Fuse.h"
+
+#include <memory>
+
+using std::unique_ptr;
+using std::make_unique;
+using std::string;
+
+#define FUSE_OBJ ((Fuse *) fuse_get_context()->private_data)
+
+namespace {
+int getattr(const char *path, struct stat *stbuf) {
+  return FUSE_OBJ->getattr(path, stbuf);
+}
+
+int fgetattr(const char *path, struct stat *stbuf, fuse_file_info *fileinfo) {
+  return FUSE_OBJ->fgetattr(path, stbuf, fileinfo);
+}
+
+int readlink(const char *path, char *buf, size_t size) {
+  return FUSE_OBJ->readlink(path, buf, size);
+}
+
+int mknod(const char *path, mode_t mode, dev_t rdev) {
+  return FUSE_OBJ->mknod(path, mode, rdev);
+}
+
+int mkdir(const char *path, mode_t mode) {
+  return FUSE_OBJ->mkdir(path, mode);
+}
+
+int unlink(const char *path) {
+  return FUSE_OBJ->unlink(path);
+}
+
+int rmdir(const char *path) {
+  return FUSE_OBJ->rmdir(path);
+}
+
+int symlink(const char *from, const char *to) {
+  return FUSE_OBJ->symlink(from, to);
+}
+
+int rename(const char *from, const char *to) {
+  return FUSE_OBJ->rename(from, to);
+}
+
+int link(const char *from, const char *to) {
+  return FUSE_OBJ->link(from, to);
+}
+
+int chmod(const char *path, mode_t mode) {
+  return FUSE_OBJ->chmod(path, mode);
+}
+
+int chown(const char *path, uid_t uid, gid_t gid) {
+  return FUSE_OBJ->chown(path, uid, gid);
+}
+
+int truncate(const char *path, off_t size) {
+  return FUSE_OBJ->truncate(path, size);
+}
+
+int ftruncate(const char *path, off_t size, fuse_file_info *fileinfo) {
+  return FUSE_OBJ->ftruncate(path, size, fileinfo);
+}
+
+int utimens(const char *path, const timespec times[2]) {
+  return FUSE_OBJ->utimens(path, times);
+}
+
+int open(const char *path, fuse_file_info *fileinfo) {
+  return FUSE_OBJ->open(path, fileinfo);
+}
+
+int release(const char *path, fuse_file_info *fileinfo) {
+  return FUSE_OBJ->release(path, fileinfo);
+}
+
+int read(const char *path, char *buf, size_t size, off_t offset, fuse_file_info *fileinfo) {
+  return FUSE_OBJ->read(path, buf, size, offset, fileinfo);
+}
+
+int write(const char *path, const char *buf, size_t size, off_t offset, fuse_file_info *fileinfo) {
+  return FUSE_OBJ->write(path, buf, size, offset, fileinfo);
+}
+
+int statfs(const char *path, struct statvfs *fsstat) {
+  return FUSE_OBJ->statfs(path, fsstat);
+}
+
+int flush(const char *path, fuse_file_info *fileinfo) {
+  return FUSE_OBJ->flush(path, fileinfo);
+}
+
+int fsync(const char *path, int flags, fuse_file_info *fileinfo) {
+  return FUSE_OBJ->fsync(path, flags, fileinfo);
+}
+
+//int setxattr(const char*, const char*, const char*, size_t, int)
+//int getxattr(const char*, const char*, char*, size_t)
+//int listxattr(const char*, char*, size_t)
+//int removexattr(const char*, const char*)
+
+int opendir(const char *path, fuse_file_info *fileinfo) {
+  return FUSE_OBJ->opendir(path, fileinfo);
+}
+
+int readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset, fuse_file_info *fileinfo) {
+  return FUSE_OBJ->readdir(path, buf, filler, offset, fileinfo);
+}
+
+int releasedir(const char *path, fuse_file_info *fileinfo) {
+  return FUSE_OBJ->releasedir(path, fileinfo);
+}
+
+int fsyncdir(const char *path, int datasync, fuse_file_info *fileinfo) {
+  return FUSE_OBJ->fsyncdir(path, datasync, fileinfo);
+}
+
+void* init(fuse_conn_info *conn) {
+  return FUSE_OBJ->init(conn);
+}
+
+void destroy(void *userdata) {
+  return FUSE_OBJ->destroy(userdata);
+}
+
+int access(const char *path, int mask) {
+  return FUSE_OBJ->access(path, mask);
+}
+
+int create(const char *path, mode_t mode, fuse_file_info *fileinfo) {
+  return FUSE_OBJ->create(path, mode, fileinfo);
+}
+
+/*int lock(const char*, fuse_file_info*, int cmd, flock*)
+int bmap(const char*, size_t blocksize, uint64_t *idx)
+int ioctl(const char*, int cmd, void *arg, fuse_file_info*, unsigned int flags, void *data)
+int poll(const char*, fuse_file_info*, fuse_pollhandle *ph, unsigned *reventsp)
+int write_buf(const char*, fuse_bufvec *buf, off_t off, fuse_file_info*)
+int read_buf(const chas*, struct fuse_bufvec **bufp, size_t size, off_T off, fuse_file_info*)
+int flock(const char*, fuse_file_info*, int op)
+int fallocate(const char*, int, off_t, off_t, fuse_file_info*)*/
+
+fuse_operations *operations() {
+  static unique_ptr<fuse_operations> singleton(nullptr);
+
+  if (!singleton) {
+    singleton = make_unique<fuse_operations>();
+    singleton->getattr = &getattr;
+    singleton->fgetattr = &fgetattr;
+    singleton->readlink = &readlink;
+    singleton->mknod = &mknod;
+    singleton->mkdir = &mkdir;
+    singleton->unlink = &unlink;
+    singleton->rmdir = &rmdir;
+    singleton->symlink = &symlink;
+    singleton->rename = &rename;
+    singleton->link = &link;
+    singleton->chmod = &chmod;
+    singleton->chown = &chown;
+    singleton->truncate = &truncate;
+    singleton->utimens = &utimens;
+    singleton->open = &open;
+    singleton->read = &read;
+    singleton->write = &write;
+    singleton->statfs = &statfs;
+    singleton->flush = &flush;
+    singleton->release = &release;
+    singleton->fsync = &fsync;
+  /*#ifdef HAVE_SYS_XATTR_H
+    singleton->setxattr = &setxattr;
+    singleton->getxattr = &getxattr;
+    singleton->listxattr = &listxattr;
+    singleton->removexattr = &removexattr;
+  #endif*/
+    singleton->opendir = &opendir;
+    singleton->readdir = &readdir;
+    singleton->releasedir = &releasedir;
+    singleton->fsyncdir = &fsyncdir;
+    singleton->init = &init;
+    singleton->destroy = &destroy;
+    singleton->access = &access;
+    singleton->create = &create;
+    singleton->ftruncate = &ftruncate;
+  }
+
+  return singleton.get();
+}
+}
+
+Fuse::~Fuse() {
+}
+
+void Fuse::run(int argc, char **argv) {
+  fuse_main(argc, argv, operations(), (void*)this);
+}
diff --git a/src/cryfs_lib/fuse/Fuse.h b/src/cryfs_lib/fuse/Fuse.h
new file mode 100644
index 00000000..5919961b
--- /dev/null
+++ b/src/cryfs_lib/fuse/Fuse.h
@@ -0,0 +1,168 @@
+#pragma once
+#ifndef CRYFS_LIB_FUSE_FUSE_H_
+#define CRYFS_LIB_FUSE_FUSE_H_
+
+#include "params.h"
+#include <fuse.h>
+#include <cstdio>
+#include <string>
+#include <sys/stat.h>
+
+class Fuse {
+public:
+	virtual ~Fuse();
+
+	void run(int argc, char **argv);
+
+	int getattr(const char *path, struct stat *stbuf) {
+	  printf("Called getattr(%s, _)\n", path);
+	  return 0;
+	}
+
+	int fgetattr(const char *path, struct stat *stbuf, fuse_file_info *fileinfo) {
+    printf("Called fgetattr(%s, _, _)\n", path);
+    return 0;
+	}
+
+	int readlink(const char *path, char *buf, size_t size) {
+    printf("Called readlink(%s, _, %d)\n", path, size);
+    return 0;
+	}
+
+	int mknod(const char *path, mode_t mode, dev_t rdev) {
+    printf("Called mknod(%s, %d, _)\n", path, mode);
+    return 0;
+	}
+
+	int mkdir(const char *path, mode_t mode) {
+    printf("Called mkdir(%s, %d)\n", path, mode);
+    return 0;
+	}
+
+	int unlink(const char *path) {
+    printf("Called unlink(%s)\n", path);
+    return 0;
+	}
+
+	int rmdir(const char *path) {
+    printf("Called rmdir(%s)\n", path);
+    return 0;
+	}
+
+	int symlink(const char *from, const char *to) {
+    printf("Called symlink(%s, %s)\n", from, to);
+    return 0;
+	}
+
+	int rename(const char *from, const char *to) {
+    printf("Called rename(%s, %s)\n", from, to);
+    return 0;
+	}
+
+	int link(const char *from, const char *to) {
+    printf("Called link(%s, %s)\n", from, to);
+    return 0;
+	}
+
+	int chmod(const char *path, mode_t mode) {
+    printf("Called chmod(%s, %d)\n", path, mode);
+    return 0;
+	}
+
+	int chown(const char *path, uid_t uid, gid_t gid) {
+    printf("Called chown(%s, %d, %d)\n", path, uid, gid);
+    return 0;
+	}
+
+	int truncate(const char *path, off_t size) {
+    printf("Called truncate(%s, %d)\n", path, size);
+    return 0;
+	}
+
+	int ftruncate(const char *path, off_t size, fuse_file_info *fileinfo) {
+    printf("Called ftruncate(%s, %d)\n", path, size);
+    return 0;
+	}
+
+	int utimens(const char *path, const timespec times[2]) {
+    printf("Called utimens(%s, _)\n", path);
+    return 0;
+  }
+
+	int open(const char *path, fuse_file_info *fileinfo) {
+    printf("Called open(%s)\n", path);
+    return 0;
+  }
+
+	int release(const char *path, fuse_file_info *fileinfo) {
+    printf("Called release(%s)\n", path);
+    return 0;
+  }
+
+	int read(const char *path, char *buf, size_t size, off_t offset, fuse_file_info *fileinfo) {
+    printf("Called read(%s, _, %d, %d, _)\n", path, size, offset);
+    return 0;
+  }
+
+	int write(const char *path, const char *buf, size_t size, off_t offset, fuse_file_info *fileinfo) {
+    printf("Called write(%s, _, %d, %d, _)\n", path, size, offset);
+    return 0;
+  }
+
+	int statfs(const char *path, struct statvfs *fsstat) {
+    printf("Called statfs(%s)\n", path);
+    return 0;
+  }
+
+	int flush(const char *path, fuse_file_info *fileinfo) {
+    printf("Called flush(%s)\n", path);
+    return 0;
+  }
+
+	int fsync(const char *path, int flags, fuse_file_info *fileinfo) {
+    printf("Called fsync(%s, %d, _)\n", path, flags);
+    return 0;
+  }
+
+	int opendir(const char *path, fuse_file_info *fileinfo) {
+    printf("Called opendir(%s, _)\n", path);
+    return 0;
+  }
+
+	int readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset, fuse_file_info *fileinfo) {
+    printf("Called readdir(%s, _, _, %d, _)\n", path, offset);
+    return 0;
+  }
+
+	int releasedir(const char *path, fuse_file_info *fileinfo) {
+    printf("Called releasedir(%s, _)\n", path);
+    return 0;
+  }
+
+	int fsyncdir(const char *path, int datasync, fuse_file_info *fileinfo) {
+    printf("Called fsyncdir(%s, %d, _)\n", path, datasync);
+    return 0;
+  }
+
+	void* init(fuse_conn_info *conn) {
+    printf("Called init()\n");
+    return this;
+  }
+
+	void destroy(void *userdata) {
+    printf("Called destroy()\n");
+  }
+
+	int access(const char *path, int mask) {
+    printf("Called access(%s, %d)\n", path, mask);
+    return 0;
+  }
+
+	int create(const char *path, mode_t mode, fuse_file_info *fileinfo) {
+    printf("Called create(%s, %d, _)\n", path, mode);
+    return 0;
+  }
+
+};
+
+#endif /* CRYFS_LIB_FUSE_FUSE_H_ */
diff --git a/src/cryfs_lib/fuse/params.h b/src/cryfs_lib/fuse/params.h
new file mode 100644
index 00000000..5a8a9e40
--- /dev/null
+++ b/src/cryfs_lib/fuse/params.h
@@ -0,0 +1,7 @@
+#pragma once
+#ifndef CRYFS_LIB_FUSE_PARAMS_H_
+#define CRYFS_LIB_FUSE_PARAMS_H_
+
+#define FUSE_USE_VERSION 26
+
+#endif /* CRYFS_LIB_FUSE_PARAMS_H_ */
diff --git a/src/main.cpp b/src/main.cpp
index 26fee77a..a8a0a1dc 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -6,14 +6,10 @@
 
 #include "cryfs_lib/CryDevice.h"
 
-int main ()
+int main (int argc, char *argv[])
 {
   printf("Version: %d\n", buildconfig::VERSION::MAJOR);
-  cryfs::CryDevice device;
-  #ifdef NDEBUG
-  printf("Release build");
-  #else
-  printf("Debug build");
-  #endif
+  Fuse fuse;
+  fuse.run(argc, argv);
   return 0;
 }