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I am trying to pass a config file asan argument from the command line to a script and not getting the expected results. Thank you :).

config called on command line as:

bash script.sh /path/to/config.txt

contents of /path/to/config.txt

#File1comment
var1=/path/to/file1
#File2comment
var2=/path/to/file2

contents of script.sh

config=$1

. $config

echo -e "$@"
test -n "$1" && set -- a b c

current

/path/to/config.txt

desired --- each file avaliable to script ---

/path/to/file2
/path/to/file2

new code

config=$1

set -- $config
echo -e "$@"
while read line; do
  printf "$line" >script.sh
done <"$config"
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  • 1
    Why aren't you printing $var1 and $var2 in your script? Commented Jan 5, 2020 at 13:56
  • so I just need to printf after the set to print each line in config? Thank you :). Commented Jan 5, 2020 at 14:18
  • I added a new code to the post that if I just print the $line, I do see each var` printed. However when I re-direct it to the script I do not see them. Are they avaliable to the script to use? Thank you :). Commented Jan 5, 2020 at 14:45

1 Answer 1

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1

It's a bit unclear what you want or need to do with your configuration file.

If your configuration file is a file that you wish to source in your script, as you do in one of you examples, then the code in the file name by $config will be executed.

Executing the code in the file name in $config sets the two variables var1 and var2. To use their values, use $var1 and $var2 in the script.

#!/bin/bash

config=$1

. $config

printf 'var1 is %s\n' "$var1"
printf 'var2 is %s\n' "$var2"

If you instead want to parse out the strings after the = characters in the file pointed to by $config, then you would probably not source the file, and instead use sed like so:

#!/bin/bash

config=$1

sed -n '/^#/d; /[^=]*=/s///p' "$config"

The sed command in this script ignores any lines that start with a # character or that does not contain a = character. For every other line, the first = character on the line and all that precedes it is removed and the remaining data is printed.

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  • Thank you very much :) Commented Jan 7, 2020 at 0:52

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