Merge pull request #1235 from scop/refactor/parentwithcontext-ppidwithcontext

[process] implement ParentWithContext using PpidWithContext

Author: shirou

process/process.go

@@ -402,6 +402,15 @@ func (p *Process) Parent() (*Process, error) {
 	return p.ParentWithContext(context.Background())
 }
 
+// ParentWithContext returns parent Process of the process.
+func (p *Process) ParentWithContext(ctx context.Context) (*Process, error) {
+	ppid, err := p.PpidWithContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	return NewProcessWithContext(ctx, ppid)
+}
+
 // Status returns the process status.
 // Return value could be one of these.
 // R: Running S: Sleep T: Stop I: Idle

process/process_darwin.go

@@ -100,15 +100,6 @@ func (p *Process) createTimeWithContext(ctx context.Context) (int64, error) {
 	return k.Proc.P_starttime.Sec*1000 + int64(k.Proc.P_starttime.Usec)/1000, nil
 }
 
-func (p *Process) ParentWithContext(ctx context.Context) (*Process, error) {
-	ppid, err := p.PpidWithContext(ctx)
-	if err != nil {
-		return nil, err
-	}
-
-	return NewProcessWithContext(ctx, ppid)
-}
-
 func (p *Process) StatusWithContext(ctx context.Context) ([]string, error) {
 	r, err := callPsWithContext(ctx, "state", p.Pid, false, false)
 	if err != nil {

process/process_fallback.go

@@ -74,10 +74,6 @@ func (p *Process) CwdWithContext(ctx context.Context) (string, error) {
 	return "", common.ErrNotImplementedError
 }
 
-func (p *Process) ParentWithContext(ctx context.Context) (*Process, error) {
-	return nil, common.ErrNotImplementedError
-}
-
 func (p *Process) StatusWithContext(ctx context.Context) ([]string, error) {
 	return []string{""}, common.ErrNotImplementedError
 }

process/process_freebsd.go

@@ -118,10 +118,6 @@ func (p *Process) createTimeWithContext(ctx context.Context) (int64, error) {
 	return k.Start.Sec*1000 + k.Start.Usec/1000, nil
 }
 
-func (p *Process) ParentWithContext(ctx context.Context) (*Process, error) {
-	return nil, common.ErrNotImplementedError
-}
-
 func (p *Process) StatusWithContext(ctx context.Context) ([]string, error) {
 	k, err := p.getKProc()
 	if err != nil {

process/process_linux.go

@@ -123,17 +123,6 @@ func (p *Process) CwdWithContext(ctx context.Context) (string, error) {
 	return p.fillFromCwdWithContext()
 }
 
-func (p *Process) ParentWithContext(ctx context.Context) (*Process, error) {
-	err := p.fillFromStatusWithContext()
-	if err != nil {
-		return nil, err
-	}
-	if p.parent == 0 {
-		return nil, fmt.Errorf("wrong number of parents")
-	}
-	return NewProcessWithContext(ctx, p.parent)
-}
-
 func (p *Process) StatusWithContext(ctx context.Context) ([]string, error) {
 	err := p.fillFromStatusWithContext()
 	if err != nil {

process/process_openbsd.go

@@ -142,10 +142,6 @@ func (p *Process) createTimeWithContext(ctx context.Context) (int64, error) {
 	return 0, common.ErrNotImplementedError
 }
 
-func (p *Process) ParentWithContext(ctx context.Context) (*Process, error) {
-	return nil, common.ErrNotImplementedError
-}
-
 func (p *Process) StatusWithContext(ctx context.Context) ([]string, error) {
 	k, err := p.getKProc()
 	if err != nil {

process/process_plan9.go

@@ -74,10 +74,6 @@ func (p *Process) CwdWithContext(ctx context.Context) (string, error) {
 	return "", common.ErrNotImplementedError
 }
 
-func (p *Process) ParentWithContext(ctx context.Context) (*Process, error) {
-	return nil, common.ErrNotImplementedError
-}
-
 func (p *Process) StatusWithContext(ctx context.Context) ([]string, error) {
 	return []string{""}, common.ErrNotImplementedError
 }

process/process_solaris.go

@@ -88,10 +88,6 @@ func (p *Process) CwdWithContext(ctx context.Context) (string, error) {
 	return p.fillFromPathCwdWithContext(ctx)
 }
 
-func (p *Process) ParentWithContext(ctx context.Context) (*Process, error) {
-	return nil, common.ErrNotImplementedError
-}
-
 func (p *Process) StatusWithContext(ctx context.Context) ([]string, error) {
 	return []string{""}, common.ErrNotImplementedError
 }

process/process_windows.go

@@ -435,15 +435,6 @@ func (p *Process) CwdWithContext(_ context.Context) (string, error) {
 	return "", nil
 }
 
-func (p *Process) ParentWithContext(ctx context.Context) (*Process, error) {
-	ppid, err := p.PpidWithContext(ctx)
-	if err != nil {
-		return nil, fmt.Errorf("could not get ParentProcessID: %s", err)
-	}
-
-	return NewProcessWithContext(ctx, ppid)
-}
-
 func (p *Process) StatusWithContext(ctx context.Context) ([]string, error) {
 	return []string{""}, common.ErrNotImplementedError
 }