execshim Cmd should provide access to a fakeable Process

execshim/cmd.go

@@ -1,6 +1,7 @@
 package execshim
 
 import (
+	"code.cloudfoundry.org/goshims/osshim"
 	"io"
 	"syscall"
 )
@@ -20,4 +21,5 @@ type Cmd interface {
 	CombinedOutput() ([]byte, error)
 	Pid() int
 	SysProcAttr() *syscall.SysProcAttr
+	Process() osshim.Process
 }

execshim/cmdshim.go

@@ -1,6 +1,7 @@
 package execshim
 
 import (
+	"code.cloudfoundry.org/goshims/osshim"
 	"io"
 	"os/exec"
 	"syscall"
@@ -57,3 +58,10 @@ func (c *cmdShim) SetStdin(b io.Reader) {
 func (c *cmdShim) SetEnv(rhs []string) {
 	c.Cmd.Env = rhs
 }
+
+func (c *cmdShim) Process() osshim.Process {
+	if c.Cmd.Process == nil {
+		return nil
+	}
+	return &osshim.ProcessShim{Process: c.Cmd.Process}
+}

osshim/process.go

@@ -0,0 +1,8 @@
+package osshim
+
+import "os"
+
+//go:generate counterfeiter -o os_fake/fake_process.go . Process
+type Process interface {
+	Signal(sig os.Signal) error
+}

osshim/process_shim.go

@@ -0,0 +1,11 @@
+package osshim
+
+import "os"
+
+type ProcessShim struct {
+	*os.Process
+}
+
+func (p *ProcessShim) Signal(sig os.Signal) error {
+	return p.Signal(sig)
+}