From dbdd22c2acb7b2f115cd1de01331d12a4766ab49 Mon Sep 17 00:00:00 2001
From: "Zed A. Shaw" <zed.shaw@gmail.com>
Date: Tue, 21 Oct 2025 14:34:03 -0400
Subject: [PATCH] Basic idea for nohup started but needs more research.

---
 nohup/.gitignore |  2 ++
 nohup/Makefile   |  3 +++
 nohup/go.mod     |  7 +++++++
 nohup/go.sum     |  4 ++++
 nohup/main.go    | 45 +++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 61 insertions(+)
 create mode 100644 nohup/.gitignore
 create mode 100644 nohup/Makefile
 create mode 100644 nohup/go.mod
 create mode 100644 nohup/go.sum
 create mode 100644 nohup/main.go

diff --git a/nohup/.gitignore b/nohup/.gitignore
new file mode 100644
index 0000000..698ab92
--- /dev/null
+++ b/nohup/.gitignore
@@ -0,0 +1,2 @@
+nohup
+nohup.exe
diff --git a/nohup/Makefile b/nohup/Makefile
new file mode 100644
index 0000000..e53d913
--- /dev/null
+++ b/nohup/Makefile
@@ -0,0 +1,3 @@
+
+build:
+	go build .
diff --git a/nohup/go.mod b/nohup/go.mod
new file mode 100644
index 0000000..f983e70
--- /dev/null
+++ b/nohup/go.mod
@@ -0,0 +1,7 @@
+module lcthw.dev/go/go-coreutils/nohup
+
+go 1.25.3
+
+require github.com/mattn/go-isatty v0.0.20
+
+require golang.org/x/sys v0.6.0 // indirect
diff --git a/nohup/go.sum b/nohup/go.sum
new file mode 100644
index 0000000..46614ef
--- /dev/null
+++ b/nohup/go.sum
@@ -0,0 +1,4 @@
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+golang.org/x/sys v0.6.0 h1:MVltZSvRTcU2ljQOhs94SXPftV6DCNnZViHeQps87pQ=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
diff --git a/nohup/main.go b/nohup/main.go
new file mode 100644
index 0000000..74ecbf0
--- /dev/null
+++ b/nohup/main.go
@@ -0,0 +1,45 @@
+package main
+
+import (
+  "fmt"
+  "os"
+  "os/exec"
+  "github.com/mattn/go-isatty"
+  "flag"
+  "log"
+  "io"
+)
+
+func main() {
+  flag.Parse()
+  prog := flag.Args()[0]
+
+  // ignore SIGHUP
+
+  if isatty.IsTerminal(os.Stdout.Fd()) {
+    fmt.Println("Is Terminal")
+  } else if isatty.IsCygwinTerminal(os.Stdout.Fd()) {
+    fmt.Println("Is cygwin/msys2 terminal")
+  } else {
+    cmd := exec.Command(prog)
+    if cmd.Err != nil { log.Fatal(cmd.Err) }
+
+    in, err := cmd.StdinPipe()
+    if err != nil { log.Fatal(err) }
+    in.Close()
+
+    stdout, err := cmd.StdoutPipe()
+    if err != nil { log.Fatal(err) }
+
+    stderr, err := cmd.StderrPipe()
+    if err != nil { log.Fatal(err) }
+
+    output := io.MultiReader(stdout, stderr)
+
+    err = cmd.Start()
+    if err != nil { log.Fatal(err) }
+
+    _, err = io.Copy(os.Stdout, output)
+    if err != nil { log.Fatal(err) }
+  }
+}