Question

I’m not sure if the title explain the real problem.

I have a shell script load_config.shusing bash shell. This script will load the configuration. Before starting to load the configuration, it prompt the user "Do you want to load all configurations? Y/N ?". If the user choose “N” it does a different job with many questions prompting.

Now the real problem is; I have added this script to run in Makefile as below. My idea is to load all the configuration when I say make install, but then the script would prompt the user. I now donot want the script to prompt and it should take defaul ‘Y’ and install all configuration. How do I make this happen ?

.load_cfg.done : %
        @echo -e "\n* Loading configuration $<"
        $(PIN_HOME)/cfg/load_config.sh $<
        touch $@

Shell : BASH
OS : LINUX

Answer 1

Use the yes command, in order to send a certain string into a user prompt.

For example, say your script looks like this:

$ cat loadConfig.sh
#!/bin/bash
read -p "Load all configuration? " -n 1 -r
if [[ $REPLY =~ ^[Yy]$ ]]
then
   echo "Loading all configuration"
else
   echo "Not loading all configuration"
fi

Pipe yes into your script:

$ yes | loadConfig.sh
Loading all configuration