From 90e2e053d25feabd2dcf384dfc262a8bcdbe3ab8 Mon Sep 17 00:00:00 2001
From: Cody Hiar <cody@hiar.ca>
Date: Sat, 5 Mar 2022 12:53:15 -0700
Subject: Initial Commit

---
 termshare/internal/daemon/daemon.go | 56 +++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 termshare/internal/daemon/daemon.go

(limited to 'termshare/internal/daemon')

diff --git a/termshare/internal/daemon/daemon.go b/termshare/internal/daemon/daemon.go
new file mode 100644
index 0000000..465cdff
--- /dev/null
+++ b/termshare/internal/daemon/daemon.go
@@ -0,0 +1,56 @@
+package daemon
+
+import (
+	"fmt"
+    "bufio"
+	"io"
+	"log"
+	"os"
+	"os/exec"
+	"syscall"
+    "strconv"
+	"unsafe"
+
+	"github.com/gliderlabs/ssh"
+	"github.com/creack/pty"
+)
+
+func setWinsize(f *os.File, w, h int) {
+	syscall.Syscall(syscall.SYS_IOCTL, f.Fd(), uintptr(syscall.TIOCSWINSZ),
+		uintptr(unsafe.Pointer(&struct{ h, w, x, y uint16 }{uint16(h), uint16(w), 0, 0})))
+}
+
+func RunDaemon(port string) {
+	ssh.Handle(func(s ssh.Session) {
+		cmd := exec.Command("bash")
+		ptyReq, winCh, isPty := s.Pty()
+		if isPty {
+			cmd.Env = append(cmd.Env, fmt.Sprintf("TERM=%s", ptyReq.Term))
+			f, err := pty.Start(cmd)
+			if err != nil {
+				panic(err)
+			}
+			go func() {
+				for win := range winCh {
+					setWinsize(f, win.Width, win.Height)
+				}
+			}()
+			go func() {
+				io.Copy(f, s) // stdin
+			}()
+			io.Copy(s, f) // stdout
+			cmd.Wait()
+		} else {
+			io.WriteString(s, "No PTY requested.\n")
+            reader := bufio.NewReader(s)
+            for {
+                input, _, _ := reader.ReadRune()
+                io.WriteString(os.Stdout, strconv.QuoteRune(input))
+            }
+			s.Exit(1)
+		}
+	})
+
+	log.Println("starting ssh server on port " + port + " ...")
+  log.Fatal(ssh.ListenAndServe(":" + port, nil))
+}
-- 
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