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package daemon
import (
"fmt"
"bufio"
"io"
"log"
"os"
"os/exec"
"syscall"
"strconv"
"unsafe"
"github.com/gliderlabs/ssh"
"github.com/creack/pty"
)
func setWinsize(f *os.File, w, h int) {
syscall.Syscall(syscall.SYS_IOCTL, f.Fd(), uintptr(syscall.TIOCSWINSZ),
uintptr(unsafe.Pointer(&struct{ h, w, x, y uint16 }{uint16(h), uint16(w), 0, 0})))
}
func RunDaemon(port string) {
ssh.Handle(func(s ssh.Session) {
cmd := exec.Command("bash")
ptyReq, winCh, isPty := s.Pty()
if isPty {
cmd.Env = append(cmd.Env, fmt.Sprintf("TERM=%s", ptyReq.Term))
f, err := pty.Start(cmd)
if err != nil {
panic(err)
}
go func() {
for win := range winCh {
setWinsize(f, win.Width, win.Height)
}
}()
go func() {
io.Copy(f, s) // stdin
}()
io.Copy(s, f) // stdout
cmd.Wait()
} else {
io.WriteString(s, "No PTY requested.\n")
reader := bufio.NewReader(s)
for {
input, _, _ := reader.ReadRune()
io.WriteString(os.Stdout, strconv.QuoteRune(input))
}
s.Exit(1)
}
})
log.Println("starting ssh server on port " + port + " ...")
log.Fatal(ssh.ListenAndServe(":" + port, nil))
}
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