doorgo/door/input_linux.go

package door

import (
	"log"
	"syscall"
)

func Reader(handle int) {
	// I don't need the select anymore.  Let the read block.

	buffer := make([]byte, 1)
	for {
		read, err := syscall.Read(handle, buffer)
		if err != nil {
			log.Printf("Reader ERR: %#v\n", err)
			close(readerChannel)
			break
		}
		if read == 1 {
			readerChannel <- buffer[0]
		} else {
			log.Printf("READ FAILED %d\n", read)
			close(readerChannel)
			break
		}
	}
}

/*
// Low level read key function.
// This gets the raw keys from the client, it doesn't handle extended keys,
// functions, arrows.
// Return key, or -1 (Timeout/No key available), -2 hangup
func (d *Door) getch() int {
	var fdsetRead syscall.FdSet
	clearAll(&fdsetRead)
	set(&fdsetRead, d.READFD)

	// 100 Usec seems like a good value, works with QModem in dosbox.
	timeout := syscall.Timeval{Sec: 0, Usec: 100}
	v, err := syscall.Select(d.READFD+1, &fdsetRead, nil, nil, &timeout)
	if v == -1 {
		// hangup
		return -2
	}
	if v == 0 {
		// timeout
		return -1
	}

	buffer := make([]byte, 1)
	r, err := syscall.Read(d.READFD, buffer)
	if r != 1 {
		// I'm getting write error here... (when disconnected)
		log.Printf("Read said ready, but didn't read a character %d %v.\n", r, err)
		// hangup
		d.Disconnected = true
		return -2
	}
	return int(buffer[0])
}

*/