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// Copyright (c) 2022, Sylabs Inc. All rights reserved.
// This software is licensed under a 3-clause BSD license. Please consult the
// LICENSE.md file distributed with the sources of this project regarding your
// rights to use or distribute this software.
package starter
import (
"context"
"net"
"os"
"github.com/sylabs/singularity/v4/internal/pkg/runtime/engine"
"github.com/sylabs/singularity/v4/pkg/sylog"
)
func CleanupHost(cleanupSocket int, e *engine.Engine) {
sylog.Debugf("Entering CleanupHost\n")
comm := os.NewFile(uintptr(cleanupSocket), "unix")
conn, err := net.FileConn(comm)
if err != nil {
sylog.Fatalf("socket communication error: %s\n", err)
}
comm.Close()
defer conn.Close()
ctx := context.TODO()
// Wait for a write into the socket from master to trigger cleanup
data := make([]byte, 1)
if _, err := conn.Read(data); err != nil {
sylog.Fatalf("While reading from cleanup socket: %s", err)
}
if err := e.CleanupHost(ctx); err != nil {
if _, err := conn.Write([]byte{'f'}); err != nil {
sylog.Fatalf("Could not write to master: %s", err)
}
sylog.Fatalf("While cleaning up: %s", err)
}
if _, err := conn.Write([]byte{'c'}); err != nil {
sylog.Fatalf("Could not write to master: %s", err)
}
os.Exit(0)
}
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