From befbf3cda533e8caa303465fd23549430d4de4d7 Mon Sep 17 00:00:00 2001
From: Jeff Carr <jcarr@wit.com>
Date: Thu, 9 Mar 2023 14:21:34 -0600
Subject: hostname actually set

Signed-off-by: Jeff Carr <jcarr@wit.com>
---
 bash.go | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 bash.go

(limited to 'bash.go')

diff --git a/bash.go b/bash.go
new file mode 100644
index 0000000..6daacec
--- /dev/null
+++ b/bash.go
@@ -0,0 +1,58 @@
+package main
+
+import (
+        "io"
+        "os"
+        "os/exec"
+        "os/signal"
+        "syscall"
+
+        "github.com/creack/pty"
+        "golang.org/x/term"
+)
+
+func test() error {
+        // Create arbitrary command.
+        c := exec.Command("bash")
+
+        // Start the command with a pty.
+        ptmx, err := pty.Start(c)
+        if err != nil {
+                return err
+        }
+        // Make sure to close the pty at the end.
+        defer func() { _ = ptmx.Close() }() // Best effort.
+
+        // Handle pty size.
+        ch := make(chan os.Signal, 1)
+        signal.Notify(ch, syscall.SIGWINCH)
+        go func() {
+                for range ch {
+                        if err := pty.InheritSize(os.Stdin, ptmx); err != nil {
+                                log("error resizing pty: %s", err)
+                        }
+                }
+        }()
+        ch <- syscall.SIGWINCH // Initial resize.
+        defer func() { signal.Stop(ch); close(ch) }() // Cleanup signals when done.
+
+        // Set stdin in raw mode.
+        oldState, err := term.MakeRaw(int(os.Stdin.Fd()))
+        if err != nil {
+                panic(err)
+        }
+        defer func() { _ = term.Restore(int(os.Stdin.Fd()), oldState) }() // Best effort.
+
+        // Copy stdin to the pty and the pty to stdout.
+        // NOTE: The goroutine will keep reading until the next keystroke before returning.
+        go func() { _, _ = io.Copy(ptmx, os.Stdin) }()
+        _, _ = io.Copy(os.Stdout, ptmx)
+
+        return nil
+}
+
+func mainBash() {
+        if err := test(); err != nil {
+                exit(err)
+        }
+}
-- 
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