internal/helper: relocate from helper

This package is ugly and is pending removal only kept alive by xdg-dbus-proxy.

Its exported symbols are made available until v0.4.0 where it will be removed for #24.

Signed-off-by: Ophestra <cat@gensokyo.uk>

1 files changed, 0 insertions, 102 deletions

diff --git a/helper/stub.go b/helper/stub.go
deleted file mode 100644
index c1f97e63..00000000
--- a/helper/stub.go
+++ /dev/null
@@ -1,102 +0,0 @@
-package helper
-
-import (
-	"flag"
-	"fmt"
-	"io"
-	"os"
-	"strconv"
-	"syscall"
-)
-
-// InternalHelperStub is an internal function but exported because it is cross-package;
-// it is part of the implementation of the helper stub.
-func InternalHelperStub() {
-	// this test mocks the helper process
-	var ap, sp string
-	if v, ok := os.LookupEnv(HakureiHelper); !ok {
-		return
-	} else {
-		ap = v
-	}
-	if v, ok := os.LookupEnv(HakureiStatus); !ok {
-		panic(HakureiStatus)
-	} else {
-		sp = v
-	}
-
-	genericStub(flagRestoreFiles(1, ap, sp))
-
-	os.Exit(0)
-}
-
-func newFile(fd int, name, p string) *os.File {
-	present := false
-	switch p {
-	case "0":
-	case "1":
-		present = true
-	default:
-		panic(fmt.Sprintf("%s fd has unexpected presence value %q", name, p))
-	}
-
-	f := os.NewFile(uintptr(fd), name)
-	if !present && f != nil {
-		panic(fmt.Sprintf("%s fd set but not present", name))
-	}
-	if present && f == nil {
-		panic(fmt.Sprintf("%s fd preset but unset", name))
-	}
-
-	return f
-}
-
-func flagRestoreFiles(offset int, ap, sp string) (argsFile, statFile *os.File) {
-	argsFd := flag.Int("args", -1, "")
-	statFd := flag.Int("fd", -1, "")
-	_ = flag.CommandLine.Parse(os.Args[offset:])
-	argsFile = newFile(*argsFd, "args", ap)
-	statFile = newFile(*statFd, "stat", sp)
-	return
-}
-
-func genericStub(argsFile, statFile *os.File) {
-	if argsFile != nil {
-		// this output is checked by parent
-		if _, err := io.Copy(os.Stdout, argsFile); err != nil {
-			panic("cannot read args: " + err.Error())
-		}
-	}
-
-	if statFile != nil {
-		// simulate status pipe behaviour
-		var epoll int
-		if fd, err := syscall.EpollCreate1(0); err != nil {
-			panic("cannot open epoll fd: " + err.Error())
-		} else {
-			defer func() {
-				if err = syscall.Close(fd); err != nil {
-					panic("cannot close epoll fd: " + err.Error())
-				}
-			}()
-			epoll = fd
-		}
-		if err := syscall.EpollCtl(epoll, syscall.EPOLL_CTL_ADD, int(statFile.Fd()), &syscall.EpollEvent{}); err != nil {
-			panic("cannot add status pipe to epoll: " + err.Error())
-		}
-
-		if _, err := statFile.Write([]byte{'x'}); err != nil {
-			panic("cannot write to status pipe: " + err.Error())
-		}
-
-		// wait for status pipe close
-		events := make([]syscall.EpollEvent, 1)
-		if _, err := syscall.EpollWait(epoll, events, -1); err != nil {
-			panic("cannot poll status pipe: " + err.Error())
-		}
-		if events[0].Events != syscall.EPOLLERR {
-			panic(strconv.Itoa(int(events[0].Events)))
-
-		}
-	}
-}