From 35fbe3850592fe247bcd0faef727d783b652df64 Mon Sep 17 00:00:00 2001
From: shirou <shirou.faw@gmail.com>
Date: Sat, 15 Jan 2022 14:09:57 +0000
Subject: [PATCH] [process][linux] Fix error handling on Children.

If pgrep returns error, `CallPgrepWithContext` always returns empty pids. So this Children always returns ErrorNoChildren. This PR fixes that handling.
---
 process/process_linux.go | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/process/process_linux.go b/process/process_linux.go
index af8f232..e425720 100644
--- a/process/process_linux.go
+++ b/process/process_linux.go
@@ -351,11 +351,11 @@ func (p *Process) PageFaultsWithContext(ctx context.Context) (*PageFaultsStat, e
 func (p *Process) ChildrenWithContext(ctx context.Context) ([]*Process, error) {
 	pids, err := common.CallPgrepWithContext(ctx, invoke, p.Pid)
 	if err != nil {
-		if len(pids) == 0 {
-			return nil, ErrorNoChildren
-		}
 		return nil, err
 	}
+	if len(pids) == 0 {
+		return nil, ErrorNoChildren
+	}
 	ret := make([]*Process, 0, len(pids))
 	for _, pid := range pids {
 		np, err := NewProcessWithContext(ctx, pid)