To interact with the terminal, you need to read from `/dev/tty` on Unix
systems, as stdin may be redirected to a non-tty input source. Here's a quick
and dirty adaptation of the `readPasswordFromStdin` code for `/dev/tty`
(warning, I did only minimal testing):
import termios
proc readPasswordfromTty*(prompt: string): string =
var tty = open("/dev/tty", fmReadWrite)
let fd = tty.getFileHandle()
var cur, old: Termios
discard fd.tcgetattr(addr cur)
old = cur
cur.c_lflag = cur.c_lflag and not Cflag(ECHO)
discard fd.tcsetattr(TCSADRAIN, addr cur)
tty.write prompt
tty.flushFile
result = tty.readLine
tty.close
discard fd.tcsetattr(TCSADRAIN, addr old)
import strutils
proc main =
let s = readPasswordfromTty("> ")
echo repeatChar(len(s), '*')
echo s
main()
