126 lines
2.3 KiB
Go
126 lines
2.3 KiB
Go
package data
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import (
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"bufio"
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"errors"
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"fmt"
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"github.com/lunixbochs/vtclean"
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"io"
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"os/exec"
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"strings"
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"time"
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)
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// BasicInteractiveShell represents non-PTY interactive shell sampling metadata
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type BasicInteractiveShell struct {
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item *Item
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variables []string
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stdoutCh chan string
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stderrCh chan string
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stdin io.WriteCloser
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cmd *exec.Cmd
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errCount int
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timeout time.Duration
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}
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func (s *BasicInteractiveShell) init() error {
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cmd := exec.Command("sh", "-c", s.item.initScripts[0])
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enrichEnvVariables(cmd, s.variables)
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stdout, err := cmd.StdoutPipe()
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if err != nil {
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return err
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}
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stderr, err := cmd.StderrPipe()
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if err != nil {
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return err
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}
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stdin, err := cmd.StdinPipe()
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if err != nil {
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return err
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}
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stdoutScanner := bufio.NewScanner(stdout)
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stderrScanner := bufio.NewScanner(stderr)
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stdoutCh := make(chan string)
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stderrCh := make(chan string)
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go func() {
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for stdoutScanner.Scan() {
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stdoutCh <- stdoutScanner.Text()
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stderrCh <- stderrScanner.Text()
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}
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}()
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s.stdoutCh = stdoutCh
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s.stderrCh = stderrCh
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s.stdin = stdin
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s.cmd = cmd
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err = cmd.Start()
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if err != nil {
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return err
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}
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for i := 1; i < len(s.item.initScripts); i++ {
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_, err := io.WriteString(s.stdin, fmt.Sprintf(" %s\n", s.item.initScripts[i]))
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if err != nil {
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return err
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}
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time.Sleep(startupTimeout) // TODO wait until cmd complete
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}
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return nil
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}
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func (s *BasicInteractiveShell) execute() (string, error) {
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if s.stdin == nil {
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return "", nil
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}
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_, err := io.WriteString(s.stdin, fmt.Sprintf(" %s\n", s.item.sampleScript))
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if err != nil {
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s.errCount++
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if s.errCount > errorThreshold {
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_ = s.cmd.Wait()
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s.item.basicShell = nil // restart session
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}
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return "", fmt.Errorf("failed to execute command: %s", err)
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}
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timeout := make(chan bool, 1)
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go func() {
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time.Sleep(s.timeout)
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timeout <- true
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}()
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var resultText strings.Builder
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var errorText strings.Builder
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for {
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select {
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case stdout := <-s.stdoutCh:
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if len(stdout) > 0 {
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resultText.WriteString(stdout)
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resultText.WriteString("\n")
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}
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case stderr := <-s.stderrCh:
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if len(stderr) > 0 {
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errorText.WriteString(stderr)
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errorText.WriteString("\n")
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}
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case <-timeout:
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if errorText.Len() > 0 {
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return "", errors.New(errorText.String())
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}
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return s.item.transform(vtclean.Clean(resultText.String(), false))
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}
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}
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}
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