Pass config file to bash script


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Top Forums UNIX for Beginners Questions & Answers Pass config file to bash script
# 8  
Quote:
Originally Posted by cmccabe
Code:
config=$1

set -- $config
echo -e "$@"
while read line; do
  echo "$line" >script.sh
done <"$config"

Code:
config=$1

echo "$@"
while read line; do
  echo "$line"
done <"$config" >other_file

This User Gave Thanks to nezabudka For This Post:
# 9  
So if I am understanding the below should write each line in config to script.sh to be able to use as variables? By sourceing . $config the config into memory, that will not print the actual variables but the script will be able to use them, if I understand correctly. Thank you Smilie.

Code:
config=$1
. $config
echo "$@"
while read line; do
  echo "$line"
done <"$config" >script.sh

# 10  
We are confused. As I understand it, all this is superfluous.
You just need to include the config in start of the script and that's it.
Code:
. $1

After this expression, your config will virtually be written to the script

--- Post updated at 19:18 ---

Do it and look
cat script.sh
Code:
#!/bin/bash
set -x
. $1
... #your commands

And launch
Code:
./script.sh config

This User Gave Thanks to nezabudka For This Post:
# 11  
Got it.... if I want to be able to view these var, for say troubleshooting, canI? They can be virtual I just may need to verify them. Thank you Smilie

I think you beat me to it and just posted.
This User Gave Thanks to cmccabe For This Post:
# 12  
I'd be very worried by this approach. You are inviting someone to put something dangerous in a file and mentioning that as a parameter and then you will call/run that unrestricted code to control the main script. Imaging what damage could be done, especially if your main script is called with sudo or is SUID. This could be an easy exploit to damage/destroy/control your server and/or data.

It makes me think of Little Bobby Tables - explain xkcd





Just a thought,
Robin
This User Gave Thanks to rbatte1 For This Post:
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