How can I pass the pathnames in a file as arguments to a shell script?

Question

I have a file ~/filelist, where each line is a file's pathname, which may contain whitespaces:

/path/to/my file1
/another path/to/my file2

I have a script which can accept filenames as arguments:

myscript.sh "/path/to/my file1"  "/another path/to/my file2"

The following commands will not work however

myscript.sh $(cat ~/filelist)

and

arr=($(cat ~/filelist))
myscript.sh "${arr[@]}"

How can I make the script work with ~/filelist? Thanks.

score 3 · Accepted Answer · answered Aug 14 '18 at 21:51

3

The usual word-splitting reasons described in

For that particular case on Bash, using mapfile and the array it provides is cleanest, since you don't need to touch word splitting directly:

$ mapfile -t paths < filelist
$ myscript.sh "${paths[@]}"

Or if you want to, directly with word-splitting:

$ set -o noglob     # disable globbing, same as 'set -f'
$ IFS=$'\n'         # split only on newlines
$ myscript $(cat filelist)

answered Aug 14 '18 at 21:51

ilkkachu

Thanks. In the script there is `ls -l "${@}"`, why does it report error `ls: cannot access '"/path/to/my file1"': No such file or directory` and `ls: cannot access '"/another path/to/my file2"': No such file or directory`? – Tim Aug 14 '18 at 22:25
@Tim, you have the literal quotes there, in the data? You don't need them, and they'd only be useful if you `eval` the command containing the filenames. – ilkkachu Aug 14 '18 at 22:41
Thanks. In `filelist`, I double quoted the pathnames which contain whitespaces – Tim Aug 15 '18 at 02:16

1 Answers1