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bashfor-loopparameterscatseq

for i in `./script `cat file`` syntax

I have a script which uses parameters. In the shell I run the script like this: ./script 1 2 3 4. I prefer to use a file which contain 1 2 3 4 in a single line and run: ./script `cat file`.

After I call this script in a for loop like this: for i in `./script `cat file` ` but it doesn't work. What is the good syntax?

Solution

  • You cannot nest tilde (command substitution) like this. You can do this bash:

    for i in $(./script $(<file))

    $(<file) is another way of getting the output of $(cat file)