From 6e052a5a0b7023ecc6a11face42c9dcbdf43f062 Mon Sep 17 00:00:00 2001
From: naison <895703375@qq.com>
Date: Wed, 30 Oct 2024 09:10:20 +0800
Subject: [PATCH] feat: logs lines support '-' sign means starting log file
 lines (#365)

---
 cmd/kubevpn/cmds/logs.go  | 2 +-
 pkg/daemon/action/logs.go | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/cmd/kubevpn/cmds/logs.go b/cmd/kubevpn/cmds/logs.go
index 677dc41b..4ba32343 100644
--- a/cmd/kubevpn/cmds/logs.go
+++ b/cmd/kubevpn/cmds/logs.go
@@ -58,6 +58,6 @@ func CmdLogs(f cmdutil.Factory) *cobra.Command {
 		},
 	}
 	cmd.Flags().BoolVarP(&req.Follow, "follow", "f", false, "Specify if the logs should be streamed.")
-	cmd.Flags().Int32VarP(&req.Lines, "number", "N", 10, "The location is number lines.")
+	cmd.Flags().Int32VarP(&req.Lines, "number", "N", 10, "Lines of recent log file to display.")
 	return cmd
 }
diff --git a/pkg/daemon/action/logs.go b/pkg/daemon/action/logs.go
index 34668661..5784ea83 100644
--- a/pkg/daemon/action/logs.go
+++ b/pkg/daemon/action/logs.go
@@ -20,7 +20,11 @@ func (svr *Server) Logs(req *rpc.LogRequest, resp rpc.Daemon_LogsServer) error {
 	}
 
 	// only show latest N lines
-	lines -= req.Lines
+	if req.Lines < 0 {
+		lines = -req.Lines
+	} else {
+		lines -= req.Lines
+	}
 
 	config := tail.Config{Follow: req.Follow, ReOpen: false, MustExist: true, Logger: log.New(io.Discard, "", log.LstdFlags)}
 	if !req.Follow {