Read fails after tcpreplay with error: 0: Resource temporarily unavailabl

Question

I have a very simple script to run. It calls tcpreplay and then ask the user to type in something. Then the read will fail with read: read error: 0: Resource temporarily una

Answer 1

While the C solution works, you can turn off nonblocking input in one line from the command-line using Python. Personally, I alias it to "setblocking" since it is fairly handy.

$ python3 -c $'import os\nos.set_blocking(0, True)'

You can also have Python print the previous state so that it may be changed only temporarily:

$ o=$(python3 -c $'import os\nprint(os.get_blocking(0))\nos.set_blocking(0, True)')
$ somecommandthatreadsstdin
$ python3 -c $'import os\nos.set_blocking(0, '$o')'