miqt-docker: conditionally use -it if parent was a tty

cmd/miqt-docker/isatty_linux.go

@@ -0,0 +1,24 @@
+//+build linux
+//go:build linux
+
+package main
+
+import (
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+func isatty() bool {
+	fd := os.Stdout.Fd()
+	req := syscall.TCGETS
+	termios := syscall.Termios{}
+
+	_, _, errno := syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd), uintptr(req), uintptr(unsafe.Pointer(&termios)))
+	if errno != 0 {
+		return false
+	}
+
+	// Successfully got Termios info = stdout is a tty
+	return true
+}

cmd/miqt-docker/isatty_other.go

@@ -0,0 +1,8 @@
+//+build !linux
+//go:build !linux
+
+package main
+
+func isatty() bool {
+	return true
+}

cmd/miqt-docker/main.go

@@ -115,7 +115,11 @@ func main() {
 
 	// Container match found - safe to run our command
 
-	fullCommand := []string{"run", "-it"}
+	fullCommand := []string{"run"}
+
+	if isatty() {
+		fullCommand = append(fullCommand, "-it")
+	}
 
 	if runtime.GOOS != "windows" {
 		userinfo, err := user.Current()