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)