Lib/tty.py

   1 """Terminal utilities."""
   2
   3 # Author: Steen Lumholt.
   4
   5 from termios import *
   6
   7 __all__ = ["setraw", "setcbreak"]
   8
   9 # Indexes for termios list.
  10 IFLAG = 0
  11 OFLAG = 1
  12 CFLAG = 2
  13 LFLAG = 3
  14 ISPEED = 4
  15 OSPEED = 5
  16 CC = 6
  17
  18 def setraw(fd, when=TCSAFLUSH):
  19     """Put terminal into a raw mode."""
  20     mode = tcgetattr(fd)
  21     mode[IFLAG] = mode[IFLAG] & ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON)
  22     mode[OFLAG] = mode[OFLAG] & ~(OPOST)
  23     mode[CFLAG] = mode[CFLAG] & ~(CSIZE | PARENB)
  24     mode[CFLAG] = mode[CFLAG] | CS8
  25     mode[LFLAG] = mode[LFLAG] & ~(ECHO | ICANON | IEXTEN | ISIG)
  26     mode[CC][VMIN] = 1
  27     mode[CC][VTIME] = 0
  28     tcsetattr(fd, when, mode)
  29
  30 def setcbreak(fd, when=TCSAFLUSH):
  31     """Put terminal into a cbreak mode."""
  32     mode = tcgetattr(fd)
  33     mode[LFLAG] = mode[LFLAG] & ~(ECHO | ICANON)
  34     mode[CC][VMIN] = 1
  35     mode[CC][VTIME] = 0
  36     tcsetattr(fd, when, mode)