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Register signal SIGUSR1 to logging connection number or release resource
Signed-off-by: Chenyang Yan <memory.yancy@gmail.com>
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@ -2,3 +2,4 @@ gotty
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builds
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js/dist
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js/node_modules/*
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.idea/*
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@ -141,6 +141,13 @@ To share your current session with others by a shortcut key, you can add a line
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bind-key C-t new-window "gotty tmux attach -t `tmux display -p '#S'`"
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```
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### Signal Notify
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GoTTY have registered `SIGINT`, `SIGTERM` and `SIGUSR1` signal.
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* `SIGINT`, `SIGTERM`: will terminate process or terminate it gracefully.
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* `SIGUSR1`: logging current connection number if activated number is not 0, or will send `SIGINT` signal. Especially useful in releasing resource according to your requirement.
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## Playing with Docker
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When you want to create a jailed environment for each client, you can use Docker containers like following:
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@ -10,8 +10,11 @@ import (
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"log"
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"net"
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"net/http"
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"os"
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"os/signal"
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"regexp"
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"strings"
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"syscall"
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noesctmpl "text/template"
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"time"
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@ -177,6 +180,24 @@ func (server *Server) Run(ctx context.Context, options ...RunOption) error {
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}
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}()
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signalUsr1 := make(chan os.Signal)
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signal.Notify(signalUsr1, syscall.SIGUSR1)
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go func() {
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for {
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value := <-signalUsr1
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number := counter.count()
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if number != 0 {
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log.Printf("signal: %s current connection number: %d/%d", value.String(), number, server.options.MaxConnection)
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continue
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}
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log.Printf("signal: %s current connection number is 0 and then will interrupt process", value.String())
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e := syscall.Kill(os.Getpid(), syscall.SIGINT)
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if e != nil && !errors.Is(e, syscall.ESRCH) {
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log.Printf("signal: %s kill process error: %s", syscall.SIGINT.String(), e)
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}
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break
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}
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}()
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select {
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case err = <-srvErr:
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if err == http.ErrServerClosed { // by gracefull ctx
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