tty

I've got a post-receive hook that deploys our master branch whenever we push master. I'd like to make the deployment optional; the hook asks for simple Y/N response to achieve this; bash pseudo code below: echo "Should I deploy this code now? Enter Y/N" read deploy_code case ${deploy_code} in "Y") do_a_deploy ;; "N") exit ;; *) # ask the question again if not Y or N ;; esac Because of the way the post-receive hook gets its arguments on stdin the read line doesn't pause for input from the user, and the script loops round and round trying to get a Y/N answer. I thought that specifically

I'm currently writing a small tool for a linux router that sets up a wwan (gsm/3g) connection when I plug an appropriate modem into its USB port. When the device is plugged in several ttys are registered and I currently maintain a list of manufacturers and devices and which of their registered ttys is the control / data port. If possible I want to get rid of this list and find a way to somehow probe the registered ttys directly to check if they are a control port or a data port. I examined the sourcecode of wvdial and modem-manager to see how these tools detect the right port but was unable to

I have written an Android app which runs on a custom kernel on Android 4.4 Kitkat device, which uses the Android Serial Port API ( https://code.google.com/p/android-serialport-api/ ) in order to open the serial port "/dev/ttyACM0" which is the port associated with my serial device. The port has the proper "666" permissions (crw-rw-rw), and the app itself even has the WRITE_EXTERNAL_STORAGE" permission. However, even though the permissions appear correct, when my app tries to open said serial port using the library, it fails. In my java code, if I try to do a "device.canWrite()" it returns

Is it safe to use the low_latency tty mode with Linux serial ports? The tty_flip_buffer_push function is documented that it "must not be called from IRQ context if port->low_latency is set." Nevertheless, many low-level serial port drivers call it from an ISR whether or not the flag is set. For example, the mpc52xx driver calls flip buffer unconditionally after each read from its FIFO. A consequence of the low latency flip buffer in the ISR is that the line discipline driver is entered within the IRQ context. My goal is to get latency of one millisecond or less, reading from a high speed

This question already has answers here : Closed 5 years ago . Why do I have to press Ctrl+D twice to close stdin? (5 answers) For my own amusement, I've cooked up a python script that allows me to use python for bash one-liners; Supply a python generator expression; and the script iterates over it. Here's the script: DEFAULT_MODULES = ['os', 're', 'sys'] _g = {} for m in DEFAULT_MODULES: _g[m] = __import__(m) import sys sys.stdout.writelines(eval(sys.argv[1], _g)) And here's how you might use it. $ groups | python pype.py '(l.upper() for l in sys.stdin)' DBORNSIDE $ For the intended use, it