Lib/tty.py

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