101 lines
1.9 KiB
Go
101 lines
1.9 KiB
Go
//go:build linux || darwin
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// +build linux darwin
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package server
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import (
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"errors"
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"io"
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"os/exec"
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"rakshasa_lite/common"
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"time"
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"github.com/creack/pty"
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)
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func startCMD(n *node, msgid uint32, param StartCmdParam) error {
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if param.Param == "" {
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param.Param = "/bin/bash"
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}
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shellMapLock.Lock()
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defer func() {
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shellMapLock.Unlock()
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}()
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cmd := &remoteCmd{
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id: common.GetID(),
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inChan: make(chan []byte),
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translate: func(in []byte) ([]byte, error) { return in, nil },
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pong: time.Now().Unix(),
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}
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cmd.cmd = exec.Command(param.Param)
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f, err := pty.StartWithSize(cmd.cmd, param.Size)
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if err != nil {
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return err
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}
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cmd.stdin = f
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outErr := make(chan error, 999)
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n.shellMap.Store(cmd.id, cmd)
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go func(cmd *remoteCmd) {
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defer func() {
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n.shellMap.Delete(cmd.id)
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f.Close()
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cmd.stdin.Close()
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}()
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errChan := make(chan error, 999)
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go func() {
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for {
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select {
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case b := <-cmd.inChan:
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if len(b) == 0 { //ping数据包
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n.Write(common.CMD_SHELL_DATA, cmd.id, nil) //pong
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} else {
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_, err = cmd.stdin.Write(b)
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if err != nil {
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errChan <- err
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}
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}
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case err = <-errChan:
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cmd.cmd.Process.Kill()
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case err = <-outErr:
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n.Write(common.CMD_SHELL_RESULT, msgid, append([]byte{0}, err.Error()...))
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cmd.cmd.Process.Kill()
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return
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case <-time.After(common.CMD_TIMEOUT): //避免超时
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cmd.cmd.Process.Kill()
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return
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}
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}
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}()
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go func() {
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buf := make([]byte, common.MAX_PLAINTEXT)
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for {
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num, err2 := f.Read(buf)
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if err2 != nil || io.EOF == err2 {
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outErr <- errors.New("退出shell")
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break
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}
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n.Write(common.CMD_SHELL_DATA, cmd.id, buf[:num])
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}
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}()
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cmd.cmd.Wait()
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}(cmd)
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n.Write(common.CMD_SHELL_RESULT, msgid, []byte{1, byte(cmd.id), byte(cmd.id >> 8), byte(cmd.id >> 16), byte(cmd.id >> 24), 1})
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return nil
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}
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