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| import getopt
import sys
try:
from StringIO import StringIO
except ImportError:
from io import StringIO
def convertToCaretAndMNotation(data):
newdata = StringIO()
if isinstance(data, str):
data = bytearray(data)
for intval in data:
if intval == 9 or intval == 10:
newdata.write(chr(intval))
continue
if intval > 127:
intval = intval -128
newdata.write("M-")
if intval < 32:
newdata.write("^")
newdata.write(chr(intval+64))
elif intval == 127:
newdata.write("^?")
else:
newdata.write(chr(intval))
return newdata.getvalue().encode()
def main(argv):
arguments = argv[1:]
short_options = "v"
long_options = ["show-nonprinting"]
show_nonprinting = False;
try:
options, filenames = getopt.gnu_getopt(arguments, short_options, long_options)
except getopt.GetoptError as err:
sys.stderr.write("Unsupported: 'cat': %s\n" % str(err))
sys.exit(1)
for option, value in options:
if option == "-v" or option == "--show-nonprinting":
show_nonprinting = True;
writer = getattr(sys.stdout, 'buffer', None)
if writer is None:
writer = sys.stdout
if sys.platform == "win32":
import os, msvcrt
msvcrt.setmode(sys.stdout.fileno(),os.O_BINARY)
for filename in filenames:
try:
fileToCat = open(filename,"rb")
contents = fileToCat.read()
if show_nonprinting:
contents = convertToCaretAndMNotation(contents)
writer.write(contents)
sys.stdout.flush()
fileToCat.close()
except IOError as error:
sys.stderr.write(str(error))
sys.exit(1)
if __name__ == "__main__":
main(sys.argv)
|