update where shell starts and add override -home setting

README.md

@@ -33,6 +33,7 @@ Change with `-setlogin` before first use.
 | `-log off` | — | Disable file logging (console output always on) |
 | `-mfa <user> on` | — | Enable TOTP MFA for user — prints secret + QR code |
 | `-mfa <user> off` | — | Disable TOTP MFA for user |
+| `-home <path>` | `~` | Starting directory for new shell sessions |
 
 ---
 
@@ -101,26 +102,8 @@ Structured JSON-lines, one entry per login attempt:
 
 ## Run as service
 - `gotermix.service` is pretty limitted, you can change settings there to suit your needs
-```bash
-# 1. Create unprivileged system user (no shell, no home)
-useradd --system --no-create-home --shell /sbin/nologin gotermix
-
-# 2. Deploy binary and set ownership
-mkdir -p /opt/gotermix
-cp gotermix /opt/gotermix/
-chown -R gotermix:gotermix /opt/gotermix
-chmod 750 /opt/gotermix
-chmod 750 /opt/gotermix/gotermix
-
-# 3. Install and enable service
-cp gotermix.service /etc/systemd/system/
-systemctl daemon-reload
-systemctl enable --now gotermix
-
-# 4. Check it's up
-systemctl status gotermix
-journalctl -u gotermix -f
-```
+- there are 2 samples, `gotermix-limitted.service` has many settings what limits what this app and sessions in can do ( you may not even change user)
+- `gotermix.service` is pretty much normal full shell without restriction, run as specific user.
 
 ---
 

internals/config.go

@@ -60,6 +60,7 @@ type Session struct {
 
 var (
 	initialCwd string
+	shellHome  string // starting directory for new shell sessions
 	nopwMode   bool
 	appCreds   storedCreds
 	authSecret []byte

internals/handlers.go

@@ -374,7 +374,7 @@ func handleUpload(w http.ResponseWriter, r *http.Request) {
 
 	destDir := strings.TrimSpace(r.FormValue("dest"))
 	if destDir == "" {
-		destDir = initialCwd
+		destDir = shellHome
 	}
 	destPath := filepath.Join(filepath.Clean(destDir), filepath.Base(header.Filename))
 
@@ -400,7 +400,7 @@ func handleDownload(w http.ResponseWriter, r *http.Request) {
 	}
 	full := filepath.Clean(path)
 	if !filepath.IsAbs(full) {
-		full = filepath.Join(initialCwd, full)
+		full = filepath.Join(shellHome, full)
 	}
 	if _, err := os.Stat(full); err != nil {
 		http.Error(w, "file not found", http.StatusNotFound)

internals/server.go

@@ -15,6 +15,24 @@ import (
 	qrcode "github.com/skip2/go-qrcode"
 )
 
+// expandHome resolves a leading ~ to the current user's home directory.
+func expandHome(p string) (string, error) {
+	if p == "" {
+		return os.UserHomeDir()
+	}
+	if p == "~" {
+		return os.UserHomeDir()
+	}
+	if strings.HasPrefix(p, "~/") {
+		home, err := os.UserHomeDir()
+		if err != nil {
+			return "", err
+		}
+		return filepath.Join(home, p[2:]), nil
+	}
+	return p, nil
+}
+
 // Run is the application entry point, called from main().
 func Run() {
 	addr       := flag.String("addr",      "127.0.0.1:5000", "listen address")
@@ -25,10 +43,24 @@ func Run() {
 	certreset  := flag.Bool("certreset",   false,            "remove stored custom certificate, revert to self-signed")
 	logFlag    := flag.String("log",       "",               "auth log file path; 'off' disables file logging (default: gotermix.log next to binary)")
 	mfaFlag    := flag.String("mfa",       "",               "manage MFA for a user: -mfa <username> on|off")
+	homeFlag   := flag.String("home",      "",               "starting directory for new shell sessions (default: user home ~)")
 	flag.Parse()
 
 	initialCwd, _ = os.Getwd()
 
+	// Resolve shell starting directory.
+	home, err := expandHome(*homeFlag)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error resolving home directory: %v\n", err)
+		os.Exit(1)
+	}
+	info, err := os.Stat(home)
+	if err != nil || !info.IsDir() {
+		fmt.Fprintf(os.Stderr, "error: -home %q is not a valid directory\n", home)
+		os.Exit(1)
+	}
+	shellHome = home
+
 	// Credentials file lives next to the executable.
 	exe, err := os.Executable()
 	if err != nil {

internals/session.go

@@ -67,7 +67,7 @@ func getOrCreate(id string) *Session {
 	} else {
 		cmd = exec.Command("/bin/bash", "-i")
 	}
-	cmd.Dir = initialCwd
+	cmd.Dir = shellHome
 
 	// Build environment: inherit parent env but force TERM so that bash readline
 	// correctly decodes modifier+cursor sequences (Shift+Arrow etc.).