/usr/lib/python2.7/dist-packages/pyraf/irafukey.py is in python-pyraf 2.1.14+dfsg-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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implement IRAF ukey functionality
$Id$
"""
from __future__ import division # confidence high
import os, string, sys
import wutil
from stsci.tools import capable, for2to3, irafutils
try:
import termios
except:
if 0==sys.platform.find('win'): # not on win*, but IS on darwin & cygwin
termios = None
else:
raise
# TERMIOS is deprecated in Python 2.1
if hasattr(termios, 'ICANON') or termios==None:
TERMIOS = termios
else:
import TERMIOS
# This class emulates the IRAF ukey parameter mechanism. IRAF calls for
# a ukey parameter and expects that the user will type a character in
# response. The value of this character is then returned to the iraf task
def getSingleTTYChar(): # return type str in all Python versions
"""Returns None if Control-C is typed or any other exception occurs"""
# Ripped off from python FAQ
fd = sys.stdin.fileno()
old = termios.tcgetattr(fd)
new = termios.tcgetattr(fd)
new[3] = new[3] & ~(TERMIOS.ICANON | TERMIOS.ECHO | TERMIOS.ISIG)
new[6][TERMIOS.VMIN] = 1
new[6][TERMIOS.VTIME] = 0
termios.tcsetattr(fd, TERMIOS.TCSANOW, new)
c = None
try:
# allow Tk mainloop to run while waiting...
# vanilla version would be c = os.read(fd, 1)
if capable.OF_GRAPHICS:
c = irafutils.tkread(fd, 1)
else:
c = os.read(fd, 1)
if for2to3.PY3K: c = c.decode('ascii', 'replace')
finally:
termios.tcsetattr(fd, TERMIOS.TCSAFLUSH, old)
return c
def ukey():
"""Returns the string expected for the IRAF ukey parameter"""
# set focus to terminal if it is not already there
wutil.focusController.setFocusTo('terminal')
char = getSingleTTYChar()
if not char:
# on control-C, raise KeyboardInterrupt
raise KeyboardInterrupt
elif char == '\004':
# on control-D, raise EOF
raise EOFError
elif ord(char) <= ord(' '):
# convert to octal ascii representation
returnStr = '\\'+"%03o" % ord(char)
elif char == ':':
# suck in colon string until newline is encountered
done = 0
sys.stdout.write(':')
sys.stdout.flush()
colonString = ''
while not done:
char = getSingleTTYChar()
if (not char) or (char == '\n'):
done = 1
elif char == '\b':
# backspace
colonString = colonString[:-1]
sys.stdout.write('\b \b')
sys.stdout.flush()
elif ord(char) >= ord(' '):
colonString = colonString+char
sys.stdout.write(char)
sys.stdout.flush()
else:
# ignore all other characters
pass
returnStr = ': '+colonString
else:
returnStr = char
return returnStr
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