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+// SiYuan - Build Your Eternal Digital Garden
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+// Copyright (c) 2020-present, b3log.org
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+//
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+// This program is free software: you can redistribute it and/or modify
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+// it under the terms of the GNU Affero General Public License as published by
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+// the Free Software Foundation, either version 3 of the License, or
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+// (at your option) any later version.
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+//
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+// This program is distributed in the hope that it will be useful,
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+// but WITHOUT ANY WARRANTY; without even the implied warranty of
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+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+// GNU Affero General Public License for more details.
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+//
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+// You should have received a copy of the GNU Affero General Public License
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+// along with this program. If not, see <https://www.gnu.org/licenses/>.
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+
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+package server
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+
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+import (
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+ "fmt"
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+ "net"
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+ "os"
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+ "os/exec"
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+ "path/filepath"
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+ "strconv"
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+ "strings"
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+ "time"
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+
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+ "github.com/88250/gulu"
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+ goPS "github.com/mitchellh/go-ps"
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+ "github.com/siyuan-note/logging"
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+ "github.com/siyuan-note/siyuan/kernel/util"
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+)
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+
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+func killRunningKernel() {
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+ defer logging.Recover()
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+
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+ if "dev" == util.Mode {
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+ return
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+ }
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+
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+ if util.ContainerStd != util.Container {
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+ return
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+ }
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+
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+ processes, err := goPS.Processes()
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+ if nil != err {
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+ logging.LogErrorf("get processes failed: %s", err)
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+ killByPort(util.FixedPort)
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+ return
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+ }
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+
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+ killed := false
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+ for _, process := range processes {
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+ procName := strings.ToLower(process.Executable())
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+ if strings.Contains(procName, "siyuan-kernel") {
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+ kill(fmt.Sprintf("%d", process.Pid()))
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+ killed = true
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+ }
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+ }
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+
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+ if killed {
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+ portJSON := filepath.Join(util.HomeDir, ".config", "siyuan", "port.json")
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+ os.RemoveAll(portJSON)
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+ }
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+}
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+
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+func killByPort(port string) {
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+ if !isPortOpen(port) {
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+ return
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+ }
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+
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+ portJSON := filepath.Join(util.HomeDir, ".config", "siyuan", "port.json")
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+ os.RemoveAll(portJSON)
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+
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+ pid := pidByPort(port)
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+ if "" == pid {
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+ return
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+ }
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+
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+ pidInt, _ := strconv.Atoi(pid)
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+ proc, _ := goPS.FindProcess(pidInt)
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+ var name string
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+ if nil != proc {
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+ name = proc.Executable()
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+ }
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+ kill(pid)
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+ logging.LogInfof("killed process [name=%s, pid=%s]", name, pid)
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+}
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+
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+func isPortOpen(port string) bool {
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+ timeout := time.Second
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+ conn, err := net.DialTimeout("tcp", net.JoinHostPort("127.0.0.1", port), timeout)
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+ if nil != err {
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+ return false
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+ }
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+ if nil != conn {
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+ conn.Close()
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+ return true
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+ }
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+ return false
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+}
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+
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+func kill(pid string) {
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+ var killCmd *exec.Cmd
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+ if gulu.OS.IsWindows() {
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+ killCmd = exec.Command("cmd", "/c", "TASKKILL /F /PID "+pid)
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+ } else {
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+ killCmd = exec.Command("kill", "-9", pid)
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+ }
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+ gulu.CmdAttr(killCmd)
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+ killCmd.CombinedOutput()
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+}
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+
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+func pidByPort(port string) (ret string) {
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+ if gulu.OS.IsWindows() {
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+ cmd := exec.Command("cmd", "/c", "netstat -ano | findstr "+port)
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+ gulu.CmdAttr(cmd)
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+ data, err := cmd.CombinedOutput()
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+ if nil != err {
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+ logging.LogErrorf("netstat failed: %s", err)
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+ return
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+ }
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+ output := string(data)
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+ lines := strings.Split(output, "\n")
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+ for _, l := range lines {
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+ if strings.Contains(l, "LISTENING") {
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+ l = l[strings.Index(l, "LISTENING")+len("LISTENING"):]
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+ l = strings.TrimSpace(l)
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+ ret = l
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+ return
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+ }
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+ }
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+ return
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+ }
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+
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+ cmd := exec.Command("lsof", "-Fp", "-i", ":"+port)
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+ gulu.CmdAttr(cmd)
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+ data, err := cmd.CombinedOutput()
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+ if nil != err {
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+ logging.LogErrorf("lsof failed: %s", err)
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+ return
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+ }
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+ output := string(data)
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+ lines := strings.Split(output, "\n")
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+ for _, l := range lines {
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+ if strings.HasPrefix(l, "p") {
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+ l = l[1:]
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+ ret = l
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+ return
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+ }
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+ }
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+ return
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+}
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