CODEWITHSUNDEEP
linuxbash
slimjim111
slimjim111

Reputation: 11

Using results of a script in another one

I'm writing a bash script to basically run one script (i.e script called list) that is already made, then take the results of the executed list script and add the listed items into another script that is made (let's call it export).

To break it down

list localhost

(this would then create a list)

0001 
0002
0003 
...

then I want to take the items listed (0001, 0002, 0003) and add them as parameters to another script (called export). This would then needed to be run as many times as there are items listed. So if there are 3 items in the list, export would run 3 times with the name of the items listed.

export 0001
export 0002
export 0003

Upvotes: 1

Views: 211

Answers (4)

hek2mgl
hek2mgl

Reputation: 157937

Alternatively to the read command in a while loop you can use xargs:

./list localhost | xargs -L1 ./export.sh

xargs -L1 calls ./export.sh once for every line of output ./list localhost produces. The line will be subject to word splitting. Meaning if ./list outputs a line like foo bar, xargs will call ./export.sh with two arguments: foo and bar. If you want to pass the whole line as a single argument instead like `./export.sh "foo bar" you can use the newline symbol as delimiter (with GNU xargs):

./list localhost | xargs -L1 -d '\n' ./export.sh

Another, portable, option (thanks mklement0) to control this behaviour is using the -I option to specify a placeholder for the argument and specify how it should be used in the command:

# Will call like ./export.sh "foo bar" (quoted as single argument)
./list localhost | xargs -I '{}' ./export.sh {}

Upvotes: 2

styko
styko

Reputation: 701

./list.sh localhost | while read -r item; do ./export.sh "$item"; done

Explanation:

  • ./list.sh localhost outputs the items
  • read -r item reads one line of the output and save it to the variable $item. -r prevents read from expanding escape sequences in the input. Just in case.
  • we do a while loop over all the lines (while …; do …; done) to call export.sh on all items

Upvotes: 3

mim.ms
mim.ms

Reputation: 112

You can use `` in your command for getting the job done quickly:

for i in `./list localhost`; do ./export $i; done

Upvotes: -1

TeaMonkie
TeaMonkie

Reputation: 169

You can use a 'piped' command to do what you want.

list localhost | myscript.sh

This will push output results from 'list localhost' into 'myscript.sh'.

Upvotes: -1

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