1 files changed, 82 insertions, 0 deletions
diff --git a/vendor/github.com/cretz/bine/process/process.go b/vendor/github.com/cretz/bine/process/process.go
new file mode 100644
index 0000000..88c6389
--- /dev/null
+++ b/vendor/github.com/cretz/bine/process/process.go
@@ -0,0 +1,82 @@
+// Package process is the low-level abstraction for a Tor instance.
+//
+// The standard use is to create a Creator with NewCreator and the path to the
+// Tor executable. The child package 'embedded' can be used if Tor is statically
+// linked in the binary. Most developers will prefer the tor package adjacent to
+// this one for a higher level abstraction over the process and control port
+// connection.
+package process
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"os"
+	"os/exec"
+	"strconv"
+	"strings"
+
+	"github.com/cretz/bine/torutil"
+)
+
+// Process is the interface implemented by Tor processes.
+type Process interface {
+	// Start starts the Tor process in the background and returns. It is
+	// analagous to os/exec.Cmd.Start.
+	Start() error
+	// Wait waits for the Tor process to exit and returns error if it was not a
+	// successful exit. It is analagous to os/exec.Cmd.Wait.
+	Wait() error
+	// ControlConn is used for statically linked, embedded processes to create
+	// a controller connection. For non-embedded processes or Tor versions that
+	// don't support embedded control connections, ErrControlConnUnsupported is
+	// returned. Note, this should only be called once per process before
+	// Start, and the connection does not need to be closed.
+	EmbeddedControlConn() (net.Conn, error)
+}
+
+// Creator is the interface for process creation.
+type Creator interface {
+	New(ctx context.Context, args ...string) (Process, error)
+}
+
+type CmdCreatorFunc func(ctx context.Context, args ...string) (*exec.Cmd, error)
+
+// NewCreator creates a Creator for external Tor process execution based on the
+// given exe path.
+func NewCreator(exePath string) Creator {
+	return CmdCreatorFunc(func(ctx context.Context, args ...string) (*exec.Cmd, error) {
+		cmd := exec.CommandContext(ctx, exePath, args...)
+		cmd.Stdout = os.Stdout
+		cmd.Stderr = os.Stderr
+		return cmd, nil
+	})
+}
+
+type exeProcess struct {
+	*exec.Cmd
+}
+
+func (c CmdCreatorFunc) New(ctx context.Context, args ...string) (Process, error) {
+	cmd, err := c(ctx, args...)
+	return &exeProcess{cmd}, err
+}
+
+// ErrControlConnUnsupported is returned by Process.EmbeddedControlConn when
+// it is unsupported.
+var ErrControlConnUnsupported = fmt.Errorf("Control conn not supported")
+
+func (e *exeProcess) EmbeddedControlConn() (net.Conn, error) {
+	return nil, ErrControlConnUnsupported
+}
+
+// ControlPortFromFileContents reads a control port file that is written by Tor
+// when ControlPortWriteToFile is set.
+func ControlPortFromFileContents(contents string) (int, error) {
+	contents = strings.TrimSpace(contents)
+	_, port, ok := torutil.PartitionString(contents, ':')
+	if !ok || !strings.HasPrefix(contents, "PORT=") {
+		return 0, fmt.Errorf("Invalid port format: %v", contents)
+	}
+	return strconv.Atoi(port)
+}