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f32bec9f4d
Refactor Process to track subprocess lifecycle via a done channel, replacing direct cmd.Wait() in Stop() to avoid double-Wait races. RunFrps/RunFrpc now use select on the done channel instead of fixed sleeps, allowing short-lived processes (verify, startup failures) to return immediately while preserving existing timeout behavior for long-running daemons.
91 lines
1.6 KiB
Go
91 lines
1.6 KiB
Go
package process
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import (
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"bytes"
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"context"
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"os/exec"
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)
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type Process struct {
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cmd *exec.Cmd
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cancel context.CancelFunc
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errorOutput *bytes.Buffer
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stdOutput *bytes.Buffer
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done chan struct{}
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waitErr error
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beforeStopHandler func()
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stopped bool
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}
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func New(path string, params []string) *Process {
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return NewWithEnvs(path, params, nil)
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}
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func NewWithEnvs(path string, params []string, envs []string) *Process {
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ctx, cancel := context.WithCancel(context.Background())
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cmd := exec.CommandContext(ctx, path, params...)
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cmd.Env = envs
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p := &Process{
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cmd: cmd,
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cancel: cancel,
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done: make(chan struct{}),
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}
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p.errorOutput = bytes.NewBufferString("")
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p.stdOutput = bytes.NewBufferString("")
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cmd.Stderr = p.errorOutput
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cmd.Stdout = p.stdOutput
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return p
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}
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func (p *Process) Start() error {
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err := p.cmd.Start()
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if err != nil {
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p.waitErr = err
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close(p.done)
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return err
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}
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go func() {
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p.waitErr = p.cmd.Wait()
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close(p.done)
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}()
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return nil
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}
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// Done returns a channel that is closed when the process exits.
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func (p *Process) Done() <-chan struct{} {
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return p.done
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}
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func (p *Process) Stop() error {
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if p.stopped {
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return nil
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}
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defer func() {
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p.stopped = true
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}()
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if p.beforeStopHandler != nil {
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p.beforeStopHandler()
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}
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p.cancel()
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<-p.done
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return p.waitErr
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}
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func (p *Process) ErrorOutput() string {
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return p.errorOutput.String()
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}
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func (p *Process) StdOutput() string {
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return p.stdOutput.String()
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}
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func (p *Process) Output() string {
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return p.stdOutput.String() + p.errorOutput.String()
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}
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func (p *Process) SetBeforeStopHandler(fn func()) {
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p.beforeStopHandler = fn
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}
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