1 files changed, 67 insertions, 0 deletions
diff --git a/vendor/github.com/mattermost/rsc/fuse/mount_linux.go b/vendor/github.com/mattermost/rsc/fuse/mount_linux.go
new file mode 100644
index 000000000..e5bc58b8a
--- /dev/null
+++ b/vendor/github.com/mattermost/rsc/fuse/mount_linux.go
@@ -0,0 +1,67 @@
+// Copyright 2012 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package fuse
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"os/exec"
+	"syscall"
+)
+
+func mount(dir string) (fusefd int, errmsg string) {
+	fds, err := syscall.Socketpair(syscall.AF_FILE, syscall.SOCK_STREAM, 0)
+	if err != nil {
+		return -1, fmt.Sprintf("socketpair error: %v", err)
+	}
+	defer syscall.Close(fds[0])
+	defer syscall.Close(fds[1])
+
+	cmd := exec.Command("/bin/fusermount", "--", dir)
+	cmd.Env = append(os.Environ(), "_FUSE_COMMFD=3")
+
+	writeFile := os.NewFile(uintptr(fds[0]), "fusermount-child-writes")
+	defer writeFile.Close()
+	cmd.ExtraFiles = []*os.File{writeFile}
+
+	out, err := cmd.CombinedOutput()
+	if len(out) > 0 || err != nil {
+		return -1, fmt.Sprintf("fusermount: %q, %v", out, err)
+	}
+
+	readFile := os.NewFile(uintptr(fds[1]), "fusermount-parent-reads")
+	defer readFile.Close()
+	c, err := net.FileConn(readFile)
+	if err != nil {
+		return -1, fmt.Sprintf("FileConn from fusermount socket: %v", err)
+	}
+	defer c.Close()
+
+	uc, ok := c.(*net.UnixConn)
+	if !ok {
+		return -1, fmt.Sprintf("unexpected FileConn type; expected UnixConn, got %T", c)
+	}
+
+	buf := make([]byte, 32) // expect 1 byte
+	oob := make([]byte, 32) // expect 24 bytes
+	_, oobn, _, _, err := uc.ReadMsgUnix(buf, oob)
+	scms, err := syscall.ParseSocketControlMessage(oob[:oobn])
+	if err != nil {
+		return -1, fmt.Sprintf("ParseSocketControlMessage: %v", err)
+	}
+	if len(scms) != 1 {
+		return -1, fmt.Sprintf("expected 1 SocketControlMessage; got scms = %#v", scms)
+	}
+	scm := scms[0]
+	gotFds, err := syscall.ParseUnixRights(&scm)
+	if err != nil {
+		return -1, fmt.Sprintf("syscall.ParseUnixRights: %v", err)
+	}
+	if len(gotFds) != 1 {
+		return -1, fmt.Sprintf("wanted 1 fd; got %#v", gotFds)
+	}
+	return gotFds[0], ""
+}