Here is some shell code extracted from https://github.com/rocky/bash-term-background to get terminal background colors. I'd like to mimic this behavior in Python so it can retrieve the values too:
stty -echo
# Issue command to get both foreground and
# background color
# fg bg
echo -ne '\e]10;?\a\e]11;?\a'
IFS=: read -t 0.1 -d $'\a' x fg
IFS=: read -t 0.1 -d $'\a' x bg
stty echo
# RGB values are in $fg and $bg
I can translate most of this, but the part I'm having problem with is echo -ne '\e]10;?\a\e]11;?\a'.
I would think that:
output = subprocess.check_output("echo -ne '\033]10;?\07\033]11;?\07'", shell=True)
would be a reasonable translation in Python 2.7, but I am not getting any output. Run in bash in an Xterm-compatible terminal gives:
rgb:e5e5e5/e5e5e6
rgb:000000/000000
But in python I am not seeing anything.
Update: As Mark Setchell suggests perhaps part of the problem is running in a subprocess. So when I change the python code to:
print(check_output(["echo", "-ne" "'\033]10;?\07\033]11;?07'"]))
I now see the RGB values output, but only after the program terminates. So this suggests the problem is hooking up to see that output which I guess xterm is sending asynchronously.
2nd Update: based on meuh's code I've placed a fuller version of this in https://github.com/rocky/python-term-background
You need to just write the escape sequence to stdout and read the response on stdin after setting it to raw mode:
#!/usr/bin/python3
import os, select, sys, time, termios, tty
fp = sys.stdin
fd = fp.fileno()
if os.isatty(fd):
old_settings = termios.tcgetattr(fd)
tty.setraw(fd)
print('\033]10;?\07\033]11;?\07')
time.sleep(0.01)
r, w, e = select.select([ fp ], [], [], 0)
if fp in r:
data = fp.read(48)
else:
data = None
print("no input available")
termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
if data:
print("got "+repr(data)+"\n")
else:
print("Not a tty")