freebsd port

Author: billziss-gh

README.md

@@ -7,7 +7,7 @@
 
 Cgofuse is a cross-platform FUSE library for Go. It is implemented using [cgo](https://golang.org/cmd/cgo/) and can be ported to any platform that has a FUSE implementation.
 
-Cgofuse currently runs on **OSX**, **Linux** and **Windows** (using [WinFsp](https://github.com/billziss-gh/winfsp)).
+Cgofuse currently runs on **OSX**, **FreeBSD**, **Linux** and **Windows** (using [WinFsp](https://github.com/billziss-gh/winfsp)).
 
 ## How to build
 
@@ -19,13 +19,22 @@ Cgofuse currently runs on **OSX**, **Linux** and **Windows** (using [WinFsp](htt
     $ go install -v ./fuse ./examples/memfs ./examples/passthrough
     ```
 
+**FreeBSD**
+- Prerequisites: fusefs-libs, clang
+- Build:
+    ```
+    $ cd cgofuse
+    $ go install -v ./fuse ./examples/memfs ./examples/passthrough
+    ```
+
 **Linux**
 - Prerequisites: libfuse-dev, gcc
 - Build:
     ```
     $ cd cgofuse
     $ go install -v ./fuse ./examples/memfs ./examples/passthrough
     ```
+
 **Windows**
 - Prerequisites: [WinFsp](https://github.com/billziss-gh/winfsp), gcc (e.g. from [Mingw-builds](http://mingw-w64.org/doku.php/download))
 - Build:
@@ -49,6 +58,8 @@ You can easily cross-compile your project using [xgo](https://github.com/karalab
         --targets=darwin/386,darwin/amd64,linux/386,linux/amd64,windows/386,windows/amd64 .
     ```
 
+Cross-compilation only works for OSX, Linux and Windows only.
+
 ## How to use
 
 User mode file systems are expected to implement `fuse.FileSystemInterface`. To make implementation simpler a file system can embed ("inherit") a `fuse.FileSystemBase` which provides default implementations for all operations. To mount a file system one must instantiate a `fuse.FileSystemHost` using `fuse.NewFileSystemHost`.

examples/passthrough/passthrough.go

@@ -1,4 +1,4 @@
-// +build darwin linux
+// +build darwin freebsd linux
 
 /*
  * passthrough.go

examples/passthrough/port_darwin.go

@@ -1,7 +1,7 @@
 // +build darwin
 
 /*
- * struct_darwin.go
+ * port_darwin.go
  *
  * Copyright 2017 Bill Zissimopoulos
  */

examples/passthrough/port_freebsd.go

@@ -0,0 +1,68 @@
+// +build freebsd
+
+/*
+ * port_freebsd.go
+ *
+ * Copyright 2017 Bill Zissimopoulos
+ */
+/*
+ * This file is part of Cgofuse.
+ *
+ * It is licensed under the MIT license. The full license text can be found
+ * in the License.txt file at the root of this project.
+ */
+
+package main
+
+import (
+	"syscall"
+
+	"github.com/billziss-gh/cgofuse/fuse"
+)
+
+func setuidgid() func() {
+	euid := syscall.Geteuid()
+	if 0 == euid {
+		uid, gid, _ := fuse.Getcontext()
+		egid := syscall.Getegid()
+		syscall.Setegid(int(gid))
+		syscall.Seteuid(int(uid))
+		return func() {
+			syscall.Seteuid(euid)
+			syscall.Setegid(egid)
+		}
+	}
+	return func() {
+	}
+}
+
+func copyFusestatfsFromGostatfs(dst *fuse.Statfs_t, src *syscall.Statfs_t) {
+	*dst = fuse.Statfs_t{}
+	dst.Bsize = uint64(src.Bsize)
+	dst.Frsize = 1
+	dst.Blocks = uint64(src.Blocks)
+	dst.Bfree = uint64(src.Bfree)
+	dst.Bavail = uint64(src.Bavail)
+	dst.Files = uint64(src.Files)
+	dst.Ffree = uint64(src.Ffree)
+	dst.Favail = uint64(src.Ffree)
+	dst.Namemax = 255 //uint64(src.Namelen)
+}
+
+func copyFusestatFromGostat(dst *fuse.Stat_t, src *syscall.Stat_t) {
+	*dst = fuse.Stat_t{}
+	dst.Dev = uint64(src.Dev)
+	dst.Ino = uint64(src.Ino)
+	dst.Mode = uint32(src.Mode)
+	dst.Nlink = uint32(src.Nlink)
+	dst.Uid = uint32(src.Uid)
+	dst.Gid = uint32(src.Gid)
+	dst.Rdev = uint64(src.Rdev)
+	dst.Size = int64(src.Size)
+	dst.Atim.Sec, dst.Atim.Nsec = src.Atimespec.Sec, src.Atimespec.Nsec
+	dst.Mtim.Sec, dst.Mtim.Nsec = src.Mtimespec.Sec, src.Mtimespec.Nsec
+	dst.Ctim.Sec, dst.Ctim.Nsec = src.Ctimespec.Sec, src.Ctimespec.Nsec
+	dst.Blksize = int64(src.Blksize)
+	dst.Blocks = int64(src.Blocks)
+	dst.Birthtim.Sec, dst.Birthtim.Nsec = src.Birthtimespec.Sec, src.Birthtimespec.Nsec
+}

examples/passthrough/port_linux.go

@@ -1,7 +1,7 @@
 // +build linux
 
 /*
- * struct_linux.go
+ * port_linux.go
  *
  * Copyright 2017 Bill Zissimopoulos
  */

fuse/fsop.go

@@ -24,11 +24,11 @@
 package fuse
 
 /*
-#if !(defined(__APPLE__) || defined(__linux__) || defined(_WIN32))
+#if !(defined(__APPLE__) || defined(__FreeBSD__) || defined(__linux__) || defined(_WIN32))
 #error platform not supported
 #endif
 
-#if defined(__APPLE__) || defined(__linux__)
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__linux__)
 
 #include <errno.h>
 #include <fcntl.h>
@@ -131,14 +131,26 @@ package fuse
 
 #if defined(__linux__) || defined(_WIN32)
 // incantation needed for cgo to figure out "kind of name" for ENOATTR
-#define ENOATTR ((int)ENODATA)
+#define ENOATTR         ((int)ENODATA)
+
+#elif defined(__FreeBSD__)
+
+// ETIME: see https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225324
+// ENODATA: the following is not strictly correct but a lot of project
+//     assume that ENODATA == ENOATTR, just because Linux does so.
+// ENOSTR, ENOSR: these are not defined anywhere; convert to EINVAL
+#define ETIME           ETIMEDOUT
+#define ENODATA         ENOATTR
+#define ENOSTR          EINVAL
+#define ENOSR           EINVAL
+
 #endif
 
 #if defined(__APPLE__) || defined(__linux__)
 #include <sys/xattr.h>
-#elif defined(_WIN32)
-#define XATTR_CREATE  1
-#define XATTR_REPLACE 2
+#elif defined(__FreeBSD__) || defined(_WIN32)
+#define XATTR_CREATE    1
+#define XATTR_REPLACE   2
 #endif
 */
 import "C"

fuse/host.go

@@ -16,22 +16,25 @@ package fuse
 #cgo darwin CFLAGS: -DFUSE_USE_VERSION=28 -D_FILE_OFFSET_BITS=64 -I/usr/local/include/osxfuse/fuse
 #cgo darwin LDFLAGS: -L/usr/local/lib -losxfuse
 
+#cgo freebsd CFLAGS: -DFUSE_USE_VERSION=28 -D_FILE_OFFSET_BITS=64 -I/usr/local/include/fuse
+#cgo freebsd LDFLAGS: -L/usr/local/lib -lfuse
+
 #cgo linux CFLAGS: -DFUSE_USE_VERSION=28 -D_FILE_OFFSET_BITS=64 -I/usr/include/fuse
 #cgo linux LDFLAGS: -lfuse
 
 // Use `set CPATH=C:\Program Files (x86)\WinFsp\inc\fuse` on Windows.
 // The flag `I/usr/local/include/winfsp` only works on xgo and docker.
 #cgo windows CFLAGS: -DFUSE_USE_VERSION=28 -I/usr/local/include/winfsp
 
-#if !(defined(__APPLE__) || defined(__linux__) || defined(_WIN32))
+#if !(defined(__APPLE__) || defined(__FreeBSD__) || defined(__linux__) || defined(_WIN32))
 #error platform not supported
 #endif
 
 #include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
 
-#if defined(__APPLE__) || defined(__linux__)
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__linux__)
 
 #include <spawn.h>
 #include <sys/mount.h>
@@ -191,7 +194,7 @@ static PVOID cgofuse_init_winfsp(VOID)
 
 #endif
 
-#if defined(__APPLE__) || defined(__linux__)
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__linux__)
 typedef struct stat fuse_stat_t;
 typedef struct statvfs fuse_statvfs_t;
 typedef struct timespec fuse_timespec_t;
@@ -257,7 +260,7 @@ static inline void hostAsgnCconninfo(struct fuse_conn_info *conn,
 #if defined(__APPLE__)
 	if (capCaseInsensitive)
 		FUSE_ENABLE_CASE_INSENSITIVE(conn);
-#elif defined(__linux__)
+#elif defined(__FreeBSD__) || defined(__linux__)
 #elif defined(_WIN32)
 #if defined(FSP_FUSE_CAP_STAT_EX)
 	conn->want |= conn->capable & FSP_FUSE_CAP_STAT_EX;
@@ -398,15 +401,15 @@ static int _hostGetxattr(char *path, char *name, char *value, size_t size,
 
 static void hostStaticInit(void)
 {
-#if defined(__APPLE__) || defined(__linux__)
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__linux__)
 #elif defined(_WIN32)
 	InitializeCriticalSection(&cgofuse_lock);
 #endif
 }
 
 static int hostFuseInit(void)
 {
-#if defined(__APPLE__) || defined(__linux__)
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__linux__)
 	return 1;
 #elif defined(_WIN32)
 	return 0 != cgofuse_init_fast(0);
@@ -502,10 +505,10 @@ static int hostMount(int argc, char *argv[], void *data)
 
 static int hostUnmount(struct fuse *fuse, char *mountpoint)
 {
-#if defined(__APPLE__)
+#if defined(__APPLE__) || defined(__FreeBSD__)
 	if (0 == mountpoint)
 		return 0;
-	// darwin: unmount is available to non-root
+	// darwin,freebsd: unmount is available to non-root
 	return 0 == unmount(mountpoint, MNT_FORCE);
 #elif defined(__linux__)
 	if (0 == mountpoint)

fuse/host_unix_test.go

@@ -1,4 +1,4 @@
-// +build darwin linux
+// +build darwin freebsd linux
 
 /*
  * host_unix_test.go